Internal radial brush type-labyrinth sealing device of cycloid rotor engine

Abstract

The invention discloses a radial brush type-labyrinth sealing device in a cycloid rotor engine. The radial brush type-labyrinth sealing device forms a brush type sealing and labyrinth sealing composite labyrinth mechanism. The brush type-labyrinth sealing device is a dynamic sealing system formed by mutual cooperation of a front baffle, a rear baffle, brush wires, a wave spring piece and a labyrinth groove. The labyrinth groove forms a labyrinth effect, the brush wires form brush type sealing, and the wave spring pieces enhance the multi-layer sealing effect. The labyrinth grooves are square, circular and trapezoidal, a labyrinth effect is formed, gas flow is slowed down through a complex path, and the sealing effect is improved. The brush wires are pushed by the wave spring piece, the brush wires are fixed between the front baffle and the rear baffle, and the brush wires make contact with the outer surface of the rotor to form sealing. And the brush wires are made of cobalt-based high-temperature alloy or carbon fiber materials and are uniformly distributed, so that the sealing efficiency is improved. The radial brush type-labyrinth sealing device is stable under high-speed operation, and the sealing performance and reliability of the cycloid rotor engine under different working conditions are optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of engine radial sealing, and relates to a radial brush-labyrinth sealing device inside a cycloid rotor engine. Background Art

[0002] Labyrinth seals are composed of multiple interlaced channels, and the fluid needs to change direction and path when passing through these channels. The complex channels in the labyrinth seal increase the resistance to fluid flow, thereby reducing leakage. The labyrinth seal includes a gap between the rotating component and the fixed component. The shape and size of the gap directly affect the sealing effect; the labyrinth seal effectively controls fluid leakage through these grooves or channels to achieve sealing performance. One of the main defects of using a single labyrinth seal in the radial sealing system of the cycloidal rotor engine is the high leakage rate. Although the purpose of the labyrinth seal is to reduce fluid leakage through multiple grooves and complex channel structures, the limitations of this design are particularly prominent in high-speed and high-temperature environments. When running at high speeds, the fluid will generate greater kinetic energy, resulting in a significant increase in the amount of leakage when the fluid passes through the sealing structure. In aircraft engines such as cycloidal rotor engines, the sealing performance of the labyrinth seal decreases under high temperature and high pressure, which directly affects the overall efficiency and reliability of the equipment. In addition, other defects of the labyrinth seal are the dynamic behavior of the fluid on the sealing performance of the labyrinth seal. When the airflow passes through the channel of the labyrinth seal, vortices are prone to occur, resulting in unstable flow of the fluid in the sealing area and increasing local pressure. This pressure change further weakens the sealing effect, especially in the working conditions of aircraft engines or turbines. The eddy effect causes gas to gather at the seal, thereby exacerbating leakage. When the gas flow is uneven, local high-pressure and low-pressure areas appear, affecting the overall performance of the labyrinth seal.

[0003] Brush seal is a sealing technology widely used in high-performance mechanical equipment, especially in the fields of aircraft engines, gas turbines and steam turbines. Brush seals mainly prevent gas or liquid leakage by the elasticity and friction characteristics of the brush wire. In the radial sealing system of the cycloidal rotor engine, the brush seal is the only sealing means. Its defect is that the brush seal is a contact seal that relies on the elastic deformation of the brush wire to seal. In a high-pressure environment, the contact pressure of the brush wire is not enough to effectively prevent leakage; at the same time, if the brush wire cannot fully fit the moving surface of the rotor in the dynamic application of the rotor engine, the risk of leakage increases. The brush wire is sensitive to the working conditions of the aircraft engine. The brush wire in the brush seal loses its elasticity at high or low temperatures, affecting the sealing effect.

[0004] Maintaining the pressure difference between the air chambers is the key to the normal operation and efficient output of the cycloidal rotor engine. The power output of the cycloidal rotor engine depends on the high-pressure gas generated during the combustion process to drive the rotor to rotate, and the pressure difference between the air chambers is the direct power source for driving the rotor to move. If this pressure difference cannot be maintained, the rotor will not be able to obtain sufficient propulsion, resulting in insufficient power output and reduced efficiency of the engine. Due to the significant pressure difference between the air chambers, several key contact points in the cylinder body of the cycloidal rotor engine must be effectively radially sealed to prevent high-pressure gas from leaking to the adjacent low-pressure air chamber. If the radial seal is poor, the pressure difference between the air chambers will decrease, thereby affecting the power output and overall performance of the cycloidal rotor engine.

[0005] In a cycloidal rotor engine, the key contact point of the seal is the contact position of the inner wall of the rotor housing, which must maintain contact with the inner wall of the housing during rotation. The rotor rotates along the inner wall of the stator and maintains a certain gap. Under the action of the elastic element, the sealing plate always maintains close contact with the outer wall of the rotor to form an effective radial seal. If there is a leak between the air chambers, the high-pressure combustion gas will enter the low-pressure air chamber, resulting in a decrease in combustion efficiency and reducing the power output of the cycloidal rotor engine. More serious leakage will cause the cycloidal rotor engine to be unable to maintain normal compression and combustion processes, and ultimately cause the cycloidal rotor engine to fail, affecting the flight mission of the drone.

[0006] When the cycloid rotor engine is working, the radial sealing plate works in a harsh environment of high temperature, high pressure and lack of lubrication. It has to withstand the inertial force caused by the high-speed rotation of the rotor and the gas pressure during the combustion and power stage of the rotor machine, and there are problems such as wear, movement, and leakage. First, high temperature will cause thermal expansion of the sealing plate and other components. Second, when the rotor rotates at high speed, it will generate huge inertial force; and the friction caused by high-speed rotation will also cause rapid wear of the sealing plate. Third, when the rotor rotates at high speed, slight eccentric movement or vibration will occur, which will cause the radial sealing plate to move or move in the sealing groove, resulting in leakage of high-pressure gas, reducing the compression and combustion efficiency of the cycloid rotor engine, and affecting the overall performance of the seal.

[0007] A Chinese patent (CN106401786A) discloses a solution of using an H-shaped spring sheet as a radial seal. By designing the spring sheet into an H-shape, the structures at both ends and in the middle strengthen its overall rigidity, and selects highly elastic and fatigue-resistant materials to adapt to high-speed operation environments. The defect of this technical solution is that the entire sealing system relies on a single H-shaped spring sheet, which is prone to deformation and fatigue under high-speed operation, resulting in sealing failure. As a result, the spring sheet is subjected to a large load at high speeds and may be over-deformed; after deformation, the spring sheet cannot provide sufficient preload, resulting in reduced sealing performance or even failure.

[0008] A Chinese patent (CN110469424A) discloses a technical solution in which the top of the sealing plate is a combined sealing structure. The top of the sealing plate adopts a combined sealing structure, which is composed of two overlapping sealing plates. The two sealing plates are overlapped to form a whole. When the rotating part (such as a rotor) is running, the sealing plate contacts the surface of the rotating part. And it is attempted to enhance the rigidity and stability of the sealing plate with the overlapping structure to form an effective physical barrier to prevent gas or liquid from leaking through the gap of the sealing plate. The defect of this technical solution is that it has poor resistance to eccentric failure. Specifically, the combined sealing structure cannot effectively adapt to the eccentric movement of the rotor, which easily leads to sealing failure. When the rotor undergoes eccentric movement or slight deformation, the sealing plate cannot maintain continuous close contact, resulting in an increased risk of leakage. Summary of the invention

[0009] The purpose of the present invention is to overcome the defects of the prior art and to propose a radial brush-labyrinth seal device inside a cycloidal rotor engine in order to solve the sealing problems caused by installation, wear, failure, pressure difference and eccentric movement of the rotor during operation.

[0010] The present invention provides a radial brush-labyrinth seal device inside a cycloidal rotor engine, which improves the sealing technology of the cycloidal rotor engine, specifically: First, the brush seal uses the gap formed by the wear-resistant brush wire material and the brush wire structure under high temperature and high pressure environment to form a primary seal, thereby reducing direct gas leakage. Second, the labyrinth seal increases the resistance to gas passage by designing a complex sealing channel, further improving the sealing effect and reducing gas leakage. Third, the brush seal and the labyrinth seal are combined and applied in the radial brush-labyrinth seal device inside the cycloidal rotor engine of the present invention to form a composite sealing structure, thereby optimizing the sealing performance of the cycloidal rotor engine and ensuring its reliability under high temperature, high pressure and high-speed rotation conditions. (2) Specific technical solutions adopted by the present invention

[0011] A radial brush-labyrinth seal device inside a cycloid rotor engine, wherein a rotor mechanism of the cycloid rotor engine is surrounded by three sections of arc-shaped side walls to form a three-petal cavity, is located in the three-petal cavity of a stator, and the outer surface of the rotor contacts a stator sealing sheet to form a contact surface between the rotor and the stator sealing sheet.

[0012] The radial brush-labyrinth seal device is installed in a groove on the stator, fixed between the front baffle plate 103 and the rear baffle plate 102, and remains stationary.

[0013] The radial brush-labyrinth seal device of the present invention is composed of a front baffle 103, a rear baffle 102, a brush 104, a wave spring sheet 101 and a labyrinth groove 105; the specific structure of each component of the radial brush-labyrinth seal device of the present invention is as follows:

[0014] The radial brush-labyrinth sealing device is composed of a front baffle (103), a rear baffle (102), a brush wire (104) and a wave spring sheet (101); the rear baffle (102) and the front baffle (103) are both in an inverted L shape and are spliced ​​together to form a gantry-like structure; a portion of the brush wire (104) is located in an opening of the gantry-like structure, and the wave spring sheet (101) is located at the top of the gantry-like structure; the sealing device is radially fixed to the side wall of the stator through the wave spring sheet (101);

[0015] The wave spring sheet (101) is used to provide a pushing force toward the rotor; the brush wire (104), the rotor, the front baffle plate (103), the rear baffle plate (102), and the wave spring sheet (101) cooperate with each other to form a dynamic sealed cavity; the brush wire (104) works in coordination with the rotational movement of the rotor under the fixed support of the front baffle plate (103) and the rear baffle plate (102), so as to prevent external dust or internal impurities from entering the sealed cavity.

[0016] The front baffle (103) and the rear baffle (102) are respectively located inside and outside the sealing device; the height of one side of the front baffle (103) of the gantry-shaped structure opening is lower than the height of one side of the rear baffle (102); the length of the brush filament (104) is greater than the height of one side of the rear baffle (102); the rear baffle (102) provides support and protection for the brush filament (104) to prevent the brush filament (104) from deforming under high pressure difference; the brush filament (104) on one side of the front baffle (103) can be tilted along the rotation direction of the rotor to reduce the deformation of the brush filament (104); the labyrinth groove (105) on the front baffle (103) forms a labyrinth effect to slow down the flow of gas; the front baffle (103) is at the front, and the brush filament 104 is guided by the labyrinth groove (105) of the front baffle (103) to tilt along the direction of movement;

[0017] A plurality of labyrinth grooves (105) having a labyrinth-shaped structure are radially arranged in the depth direction of the inner side of the opening formed by the front baffle plate (103) and the rear baffle plate (102). The plurality of labyrinth grooves (105) force the gas flow path to become tortuous, forming a labyrinth effect. The labyrinth grooves (105) are symmetrically distributed on the left and right sides, so that the gas flow is subjected to uniform resistance when passing through the front baffle plate (103) and the rear baffle plate (102).

[0018] The wave spring sheet (101) is formed by combining a plurality of wave spring sheets (101) into a wave shape to form a plurality of raised portions, which are elastically deformed under the action of the force generated by the movement of the rotor, and are capable of absorbing and buffering external forces and generating continuous pushing force, thereby maintaining close contact between the brush filaments (104) and the inner wall of the cylinder body.

[0019] The brush filaments (104) are evenly distributed during the arrangement process, and the brush filaments (104) are arranged in bundles with equal spacing; the bundles are arranged in a forked arrangement, a straight arrangement, or a middle straight arrangement and a four-sided forked arrangement; the forked arrangement is a cross arrangement, the density of the brush filaments (104) is high, and the gaps are reduced; the straight arrangement is arranged in a straight line sequence, ensuring that the spacing between each brush filament (104) is uniform and minimal.

[0020] The labyrinth groove shape of the labyrinth groove (105) is square, circular or trapezoidal; each groove of the square labyrinth groove (105) is rectangular or square, and its edge is a straight line; each groove of the circular labyrinth groove (105) is circular or elliptical, and its edge is an arc; each groove of the trapezoidal labyrinth groove (105) is a trapezoid.

[0021] The labyrinth grooves 105 are arranged on the front baffle plate 103 and the rear baffle plate 102, and have a labyrinth groove structure; a plurality of labyrinth grooves 105 force the gas flow path to become tortuous and complex, forming a labyrinth effect; the labyrinth grooves 105 are equidistant, so that the gas flow is subjected to uniform resistance when passing through the front baffle plate 103 and the rear baffle plate 102; the labyrinth grooves 105 are annular or spiral, so that the gas changes direction multiple times when passing through; the labyrinth grooves 105 are divided into a stationary labyrinth groove 1 05 and a rotating labyrinth groove 105; the labyrinth groove 105 is fixed on the stator and does not rotate with the rotor; the labyrinth groove shape of the labyrinth groove 105 is square, circular, or trapezoidal; the square labyrinth groove 105 means that each labyrinth groove 105 is rectangular or square, and the edges are straight lines; the circular labyrinth groove 105 means that each labyrinth groove 105 is circular or elliptical, and the edges are arcs; the trapezoidal labyrinth groove 105 means that each labyrinth groove 105 is trapezoidal, wide at the top and narrow at the bottom, or narrow at the top and wide at the bottom.

[0022] The labyrinth grooves (105) are arranged in a ring or spiral shape on the rotor surface, so that the gas changes direction multiple times when passing through.

[0023] Furthermore, the radial brush-labyrinth seal device of the present invention is composed of a front baffle 103, a rear baffle 102, a brush 104 and a wave spring sheet 101; the connection relationship of each component is as follows:

[0024] The brush wire 104, the front baffle plate 103, the rear baffle plate 102, the wave spring sheet 101 and the sealing cavity cooperate with each other to form a dynamic sealing system; the brush wire 104 is fixedly supported by the front baffle plate 103 and the rear baffle plate 102, and the rotor rotates along the inner wall of the stator while maintaining a certain gap. Under the action of the elastic element, the radial sealing sheet always maintains close contact with the outer wall of the rotor, forming an effective radial seal, thereby preventing external dust or other impurities (debris) from entering the sealing cavity;

[0025] The front baffle 103 and the rear baffle 102 are connected by a fixing device or a notch to form the overall structure of the brush-labyrinth sealing device; the brush wire 104 and the front baffle 103 and the rear baffle 102 are connected by the brush wire 104 passing between the front baffle 103 and the rear baffle 102, and then maintained stable by the pushing force of the wave spring sheet 101; the wave spring sheet 101 and the brush-labyrinth sealing device are fixed to the inner side of the front baffle 103 and the rear baffle 102 by the wave spring sheet 101, forming a continuous pushing force system to ensure the stability of the brush-labyrinth sealing device under high-speed operation;

[0026] The matching relationship between the brush 104 and the front and rear baffles (the front baffle 103 and the rear baffle 102) is mainly reflected in fixation and stability. The brush 104 is fixed by high-performance welding. One end of the brush 104 is fixed on the front baffle 103 or the rear baffle 102 to ensure that its position in the sealed cavity is stable and the brush 104 is not loose; and the front baffle 103 or the rear baffle 102 provides support for the brush 104, ensuring that the brush 104 maintains a stable position during movement and does not deviate from the set track due to the rotation of the rotor along the inner wall of the stator.

[0027] The wave spring sheet 101 is fixed to the top of the rear baffle 102 by mechanical connection or welding; the wave spring sheet 101 transmits uniform and continuous pressure to the brush wire 104 through the rear baffle 102; the wave spring sheet 101, supported by the front baffle 103 and the rear baffle 102, realizes pre-tightening and elastic support of the brush wire 104.

[0028] Furthermore, the radial brush-labyrinth seal device inside the cycloid rotor engine described in the present invention has the following specific parameters:

[0029] Preferably, the spacing between the labyrinth grooves 105 on the same side is 0.3-0.8 mm, and the number of the labyrinth grooves 105 may be 2-5;

[0030] Preferably, the brush filaments are solid cylindrical, and the diameter of each brush filament 104 is between 0.01 mm and 0.1 mm, mainly 0.07 mm, and the length is between 36 mm;

[0031] Preferably, the brush filaments 104 bundle are made of metal materials including cobalt-based high-temperature alloys and carbon fibers.

[0032] Preferably, the number of the wave spring sheets 101 is 3-6 to maintain close contact between the brush filaments 104 and the rotor.

[0033] (3) Working principle and sealing mechanism of the technical solution described in the present invention

[0034] Furthermore, the working principle of the radial brush-labyrinth seal device inside the cycloid rotor engine described in the present invention is:

[0035] First, the sealing principle of the labyrinth seal: The labyrinth seal reduces leakage by increasing the complexity of the gas flow path. The static labyrinth groove 105 requires the gas to change direction multiple times when passing through, increasing the flow resistance. The brush wire 104 provides an additional physical barrier, further improving the sealing effect. This design utilizes the principle that complex paths increase fluid resistance and energy loss, ensuring that it can still provide efficient sealing effects under various working conditions. Specifically, Figure 2 As shown, the gas flows from the high-pressure area to the low-pressure area, passing through the staggered maze grooves 105 and the brush wires 104; the rotor rotation direction indicates the rotor rotation direction, indicating the gas flow path; the layout of the brush wires 104 and the maze grooves 105 shows the staggered arrangement of the maze grooves 105 and the installation position of the brush wires, illustrating the complexity of the gas flow path.

[0036] Second, the sealing principle of the brush seal: The brush seal achieves the sealing effect through the contact between the flexible brush filament 104 and the surface of the rotating part. The brush filament 104 is made of highly flexible and wear-resistant material, which can adapt to the movement and deformation of the rotating part and provide dynamic sealing. The main principle of the brush seal is to use the flexibility and elasticity of the brush filament 104 to form a tight sealing barrier under high-speed rotation and pressure difference conditions to prevent gas or liquid leakage.

[0037] Third, the sealing principle of the "brush-labyrinth" composite seal: In the "brush-labyrinth" composite seal, the static labyrinth seal is responsible for reducing the kinetic energy of the gas through a complex flow path and providing preliminary leakage control; while the dynamic brush seal further blocks the leakage of the remaining gas through flexible contact with the surface of the rotating part. The two work together to form a multi-level sealing system, ensuring that the cycloidal rotor engine can achieve efficient sealing under complex working conditions. This progressive leakage control strategy enables the composite seal to maintain its sealing performance even under high-speed rotation and large pressure differences.

[0038] First, the labyrinth seal provides a static seal. The front baffle 103, the rear baffle 102 and the labyrinth groove 105 are static structures, all fixed on the stator, and do not move with the movement of the rotor. In particular, the labyrinth groove 105 extends the path of gas leakage by means of a static labyrinth groove (labyrinth groove 105) fixed on the stator. When the gas flows from the high-pressure area to the low-pressure area, it must pass through a tortuous path formed by multiple labyrinth grooves 105. These labyrinth grooves 105 are staggered, forcing the gas to change its flow direction in each labyrinth groove 105. Every time the airflow passes through these narrow labyrinth grooves 105, it slows down due to flow resistance, and the kinetic energy is gradually consumed.

[0039] The working principle of the labyrinth seal providing a static seal is as follows: Since the structure of the labyrinth groove 105 is fixed, the path of the gas will be extended each time it passes through a labyrinth groove 105, and the flow direction will continue to change. The fluid needs to overcome greater resistance in these complex paths, and the kinetic energy dissipation gradually increases, thereby reducing the possibility of leakage. The role of the labyrinth seal is to reduce the initial flow kinetic energy of most gases and form a preliminary sealing barrier.

[0040] Secondly, the brush seal provides dynamic sealing: the brush filament 104 is a key dynamic sealing structure, and the brush filament 104 is installed between the labyrinth groove 105 and the rotor surface. The brush filament 104 is made of a material with good elasticity (such as metal wire or synthetic material) and can dynamically adjust its position as the rotor rotates. The brush filament 104 maintains flexible contact with the surface of the rotor. When the rotor rotates at high speed, the brush filament 104 can still stick to the surface of the rotor and play a dynamic sealing role. The flexible design of the brush filament 104 can adapt to the slight eccentricity or deformation of the rotor at any time, so as to always maintain the sealing performance during operation. At the same time, due to the high flexibility of the brush filament 104, it can adapt to the movement of the rotating parts, reduce friction loss, and extend the service life of the sealing component; and then the brush filament 104 further prevents gas leakage through physical contact and maintains the sealing effect under dynamic movement.

[0041] Third, the "brush-labyrinth" composite seal forms a progressive strategy for leakage control: First, there is the initial resistance of the labyrinth seal. After entering the composite sealing system, the gas will first encounter the labyrinth grooves 105. Due to the staggered arrangement of these labyrinth grooves 105, the gas needs to constantly change direction and pass through multiple narrow paths, causing the air flow speed to gradually slow down. This process greatly increases the resistance of the fluid, consumes the kinetic energy of the gas, and significantly slows down the gas leakage rate. Next is the further blocking of the brush seal. After the initial blocking of the labyrinth seal, there is still a certain amount of gas that will continue to flow along the low-pressure area, at which time it will encounter the brush wire 104. The brush wire, as a flexible barrier, is close to the rotor surface and forms a dynamic contact with it. When the gas flows through the brush wire 104, its kinetic energy will be further consumed due to the physical barrier of the brush wire 104, and the possibility of leakage will be further reduced. Furthermore, when the gas passes through the labyrinth seal, the path becomes complicated and the resistance increases, causing its kinetic energy and pressure to gradually decrease; then the brush wire 104 further provides a flexible physical barrier, which further dissipates the kinetic energy of the gas through contact with the rotor surface and elastic deformation of the brush wire 104, thereby effectively preventing gas leakage. The multiple blocking mechanisms of the "brush-labyrinth" composite seal ensure the efficient sealing performance of the cycloid rotor engine.

[0042] Furthermore, in the radial brush-labyrinth seal device inside the cycloid rotor engine described in the present invention, the sealing mechanism formed by the five components is:

[0043] First, the labyrinth seal part: The wave spring sheet 101 mainly serves to increase the contact area of ​​the sealing surface. The wave spring sheet 101 belongs to a labyrinth seal structure. The arc-shaped corrugated structure of the wave spring sheet 101 extends the leakage path of the gas or fluid, thereby increasing the sealing effect. The wave spring sheet 101 is the upper part of the seal, which is used to prevent gas or fluid leakage. In the sealing system of the cycloid rotor engine, the wave spring sheet 101 is similar to a corrugated structure to increase the contact area of ​​the sealing surface, thereby improving the sealing effect.

[0044] The front baffle 103 is part of a labyrinth seal. These staggered structures form a labyrinth seal that prevents or reduces leakage by increasing the length of the path for gas or fluid to pass through. The airflow repeatedly returns between the front baffle 103 structures, improving the sealing effect. The labyrinth seal uses the front baffle 103 to form an intricate flow channel structure, forming a longer sealing path, making it more difficult for gas to leak.

[0045] In the sealing design of the cycloid rotor engine, the labyrinth groove 105 belongs to a labyrinth sealing structure, and works together with other labyrinth sealing elements (such as the front baffle 103) to enhance the sealing effect. The role of the labyrinth groove 105 is to further extend the leakage path of the airflow or liquid, and to form a complex channel through multiple labyrinth grooves 105, thereby increasing the flow resistance of the fluid and reducing leakage.

[0046] Second, the brush seal part: the rear baffle 102 is mainly used to fix the entire sealing device to the engine housing. The rear baffle 102 is an auxiliary structure of the brush seal, ensuring that the brush wire 104 is correctly positioned and tightly fixed in the cycloid rotor engine, and the brush seal is tightly connected to the cycloid rotor engine housing to prevent the components from loosening or moving. The rear baffle 102 plays a role in structural fixing to ensure that the sealing assembly is firmly connected.

[0047] The brush filament 104 is a brush-like structure at the bottom and belongs to a brush seal. The brush seal mainly relies on the contact between the brush filament 104 and the surface of the rotating part to form a flexible physical barrier to prevent gas or liquid leakage. The brush seal is suitable for occasions where flexibility and sealing are required at the same time, especially between rotating parts. The brush filament 104 can fit closely to the surface of the rotating part and maintain a certain preload during operation. The fine gaps and high-density arrangement of the brush filament 104 further prevent direct leakage of gas.

[0048] (4) Compared with the prior art, the present invention has significant technical effects

[0049] The overall advantage of the present invention is that a multi-layer sealing effect is achieved through the combination of the brush 104, the front baffle 103, the rear baffle 102 and the wave spring sheet 101, thereby significantly improving the sealing performance.

[0050] The core function of the radial brush-labyrinth seal device inside the cycloid rotor engine of the present invention is to effectively reduce gas leakage by combining a labyrinth structure and a brush wire structure. In a cycloid rotor engine, due to the pressure difference between the high-pressure and low-pressure areas inside, the gas will naturally tend to leak from the high-pressure area to the low-pressure area. The labyrinth seal increases the complexity of the airflow path, forcing the gas to change direction and narrow the path multiple times when passing through, thereby consuming kinetic energy and slowing down the gas flow speed. The brush wire 104 provides an additional dynamic physical barrier by contacting the rotor surface, further preventing gas leakage.

[0051] Cycloid rotor engines are often in a high pressure differential and high speed rotation working environment during operation, which can cause the seal to produce slight deformation or displacement during movement. Through the flexible structure of the brush filament 104 and the static path design of the labyrinth seal, the composite sealing system can cope with these working conditions. The brush filament 104 is elastic and flexible, and can adapt to the high speed rotation and slight deformation of the rotor, maintain close contact of the seal, and reduce wear and performance degradation caused by high speed friction.

[0052] In a high-speed rotating cycloidal rotor engine, the contact between the seal and the rotor will generate a large friction force, which will cause the wear of the sealing material over time, thereby affecting the sealing performance. Through the combination of the brush wire 104 and the labyrinth structure, the airflow has been dissipated by the kinetic energy of the labyrinth seal before entering the sealing part of the brush wire 104, reducing the pressure directly borne by the brush wire 101, thereby reducing the degree of friction and wear. At the same time, the wave spring sheet 101 can provide uniform pressure, so that the brush wire maintains flexible contact with the rotor surface, further reducing the impact of friction on the brush wire 104 and extending the service life of the seal.

[0053] Since the cycloid rotor engine may experience minor deformation and thermal expansion of the rotor when it is running, the composite sealing system of the present invention can adjust the sealing gap in real time through the elastic deformation of the brush wire 104 and the pressure adjustment of the spring sheet, ensuring that the brush wire 104 can still fit the rotor surface tightly when the rotor is deformed. The elastic support force provided by the wave spring sheet 101 to the brush wire 104 can help the sealing device to continuously adapt to the changes of the rotor in a dynamic environment and prevent leakage caused by deformation.

[0054] The radial brush-labyrinth seal device inside the cycloid rotor engine of the present invention significantly reduces the actual gap in the seal device by combining the complex flow path of the labyrinth seal and the flexible seal of the brush wire 104. The labyrinth seal forces the gas to change direction multiple times in a narrow path, while the brush wire 104 further blocks gas leakage through close arrangement and high-density design. The pushing force provided by the wave spring sheet 101 enhances the contact between the brush wire 104 and the rotor surface, so that when running at high speed, the seal will not cause the gap to increase due to rotor eccentricity or slight deformation.

[0055] Under the complex working conditions of the cycloid rotor engine, external dust or debris may enter the sealed cavity and affect the performance of the engine. The composite seal can not only prevent the leakage of internal gas, but also prevent external impurities from entering through the combination of the labyrinth effect and the brush 104 seal. The close contact between the brush 104 and the rotor forms a barrier to prevent external contaminants from entering the sealed cavity, ensuring the cleanliness of the engine.

[0056] The radial brush-labyrinth sealing device inside the cycloid rotor engine described in the present invention combines the brush wire 104 with the labyrinth structure, so that the sealing device can not only adapt to the complex operating conditions inside the engine (such as temperature, pressure and speed changes), but also the brush wire 104 can be dynamically adjusted under the action of the wave spring sheet 101 even if the labyrinth seal is stationary, ensuring stable sealing performance during long-term use and reducing the risk of sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 A three-dimensional diagram of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention;

[0059] Figure 2 It is an overall plan view of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention;

[0060] Figure 3 A schematic diagram of the front and rear baffles and the square grooves of the radial brush-labyrinth seal device inside the cycloid rotor engine according to the present invention;

[0061] Figure 4 A schematic diagram of the front and rear baffles and circular grooves of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention;

[0062] Figure 5 A schematic diagram of the front and rear baffles and the trapezoidal grooves of the radial brush-labyrinth seal device inside the cycloid rotor engine according to the present invention;

[0063] Figure 6 A schematic diagram of brush wire deflection of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention;

[0064] Figure 7 The present invention is a schematic diagram of the labyrinth sealing principle of a radial brush-labyrinth sealing device inside a cycloidal rotor engine.

[0065] Figure 8 A schematic diagram of a spring sheet of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention.

[0066] Fig. 9 The present invention is a cycloidal rotor engine internal radial brush-labyrinth seal device, showing two arrangements of brush wires 104: staggered (a), sequential (b), and sequential in the middle and staggered around (c).

[0067] Reference numerals: wave spring sheet 101 ; rear baffle 102 ; front baffle 103 ; brush 104 ; labyrinth groove 105 ; brush mounting base 106 . DETAILED DESCRIPTION

[0068] The radial sealing device of the cycloid rotor engine of the present invention, wherein the rotor shape can be quasi-elliptical or cycloid, needs to ensure that the air chambers are separated from each other. Specifically, the rotor can be designed to be quasi-elliptical or cycloid. Compared with the triangular rotor, the quasi-elliptical or cycloid rotor can provide a smoother airflow path and more effective air chamber separation.

[0069] The present invention provides a radial brush-labyrinth seal device inside a cycloidal rotor engine, which improves the sealing technology of the cycloidal rotor engine. First, the brush filaments 104 installed on the brush filament base surface 106 of the internal radial brush-labyrinth seal device of the brush seal form a gap to form a primary seal and reduce direct gas leakage. Second, the labyrinth seal forms grooves 105 with equal spacing by respectively slotting the two sides of the front baffle 103 and the rear baffle 102 that form an inverted L shape and splice them into a gantry-like structure, thereby increasing the resistance to gas passage, further improving the sealing effect, and reducing gas leakage. Third, the brush seal and the labyrinth seal are combined and applied in the radial brush-labyrinth seal device inside the cycloidal rotor engine of the present invention to form a composite sealing structure that synchronously blocks the airflow, thereby optimizing the sealing performance of the cycloidal rotor engine and ensuring reliability under high temperature, high pressure and high-speed rotation conditions.

[0070] The radial brush-labyrinth seal device inside a cycloid rotor engine of the present invention includes the following structural features:

[0071] The radial brush-labyrinth seal device inside the cycloid rotor engine of the present invention is composed of a front baffle 103, a rear baffle 102, a brush wire 104, a wave spring sheet 101, a labyrinth groove 105, and a brush wire installation base 106; the specific structure is as follows:

[0072] The sealing device is composed of a front baffle (103), a rear baffle (102), a brush (104) and a wave spring sheet (101); the rear baffle (102) and the front baffle (103) are both in an inverted L shape and are spliced ​​together to form a gantry-shaped structure; a portion of the brush (104) is located in an opening of the gantry-shaped structure, and the wave spring sheet (101) is located at the top of the gantry-shaped structure; the sealing device is radially fixed to the side wall of the stator through the wave spring sheet (101); the wave spring sheet (101) is used to provide a pushing force toward the rotor; the brush (104), the rotor, the front baffle (103), the rear baffle (102) and the wave spring sheet (101) cooperate with each other to form a dynamic sealing cavity; the brush (104) is fixedly supported by the front baffle (103) and the rear baffle (102) and works in coordination with the rotational movement of the rotor to prevent external dust or internal impurities from entering the sealing cavity.

[0073] (1) The wave spring sheet 101 is located on the back of the brush wire 104, between the front baffle plate 103 and the rear baffle plate 102; a plurality of spring sheets 10 are combined to form a shape similar to a continuous mountain range, and the continuous pushing force ensures that the radial brush-labyrinth seal device will not fail at high speed, thereby maintaining close contact between the brush wire 104 and the inner wall of the cylinder body to prevent gas leakage.

[0074] (2) The rear baffle 102 is located at the rear of the sealing device; the height of the rear baffle 102 is higher than that of the front baffle 103 and is second only to the height of the brush 104, in order to prevent the brush 104 from being deformed under a large pressure difference; the higher design of the rear baffle 102 can prevent the brush 104 from being deformed under a large pressure difference, and at the same time, the gas flow is slowed down by the groove, thereby further reducing leakage;

[0075] (3) The front baffle 103 is located at the front of the sealing device; the front baffle 103 is relatively short, lower than the rear baffle 102 and the brush 104. This is because the brush 104 needs to be deflected along the moving direction of the moving part. The front baffle 103 allows the brush 104 to have a certain tilt angle, while ensuring that the brush 104 will not be greatly deformed; the shorter design of the front baffle 103 allows the brush 104 to tilt along the moving direction of the moving part, reducing the deformation of the brush 104; the labyrinth groove 105 on the front baffle 103 forms a labyrinth effect, slowing down the gas flow and reducing leakage;

[0076] (4) The brush 104 is located between the front baffle 103 and the rear baffle 102, and runs through the entire radial brush-labyrinth seal device; the height of the brush 104 is much higher than the front baffle 103, but slightly higher than the rear baffle 102; the brush 104 bundle is made of highly flexible and wear-resistant material, and the brush 104 is arranged in a forked or straight row to ensure the sealing effect and durability; the brush 104 is deflected along the direction of the moving parts under the guidance of the front baffle 103 to reduce deformation.

[0077] (5) The labyrinth grooves 105 are arranged on the baffle plate 103 and the rear baffle plate 102 to form a labyrinth effect, so that the flowing gas generated by the combustion is decelerated or even stopped when it approaches the radial seal, thereby reducing leakage.

[0078] In addition, the brush installation base 106 is arranged at the central position of the inverted double "L"-shaped gantry guide structure formed by the front baffle 103 and the rear baffle 102, and the brush 104 can be installed on the internal radial brush-labyrinth seal device through the brush installation base 106.

[0079] Furthermore, the radial brush-labyrinth seal device inside the cycloid rotor engine of the present invention has the following overall connection relationship: the radial brush-labyrinth seal device inside the cycloid rotor engine of the present invention is composed of a front baffle 103, a rear baffle 102, a brush wire 104, a wave spring sheet 101 and a labyrinth groove 105;

[0080] Specifically, the spatial position relationship of these five components is as follows: the front baffle 103 is at the front, and the brush wire 104 is guided by the groove of the front baffle to tilt along the direction of movement; the rear baffle 102 is at the rear, providing support and protection to prevent the brush wire 104 from deforming under high pressure difference; the brush wire 104 is located in the middle and fixed by high-performance welding; the wave spring sheet 101 is on the back of the brush wire 104, providing pushing force to ensure the close contact of the brush wire 104; the maze grooves 105 are both arranged on the baffle 103 and the rear baffle 102, so as to form a maze effect.

[0081] Specifically, the connection and matching relationship of these five components is as follows: the front baffle 103 and the rear baffle 102 are connected by the notch of the labyrinth groove 105 to form the overall structure of the brush-labyrinth sealing device; the brush wire 104 and the front baffle 103 and the rear baffle 102 are fixed by high-performance welding through the brush wire 104 passing through the front baffle 103 and the rear baffle 102, and then maintained stable by the pushing pressure of the wave spring sheet 101; the wave spring sheet 101 is fixed to the inner side of the front baffle 103 and the rear baffle 102 to form a continuous pushing force system to ensure the stability of the brush-labyrinth sealing device under high-speed operation.

[0082] Furthermore, the mechanical design principles of each component of the radial brush-labyrinth seal device inside the cycloid rotor engine described in the present invention are as follows:

[0083] Specifically, the wave spring sheet 101 follows the principles of elastic design, stress distribution, and fatigue life. From the perspective of elastic design, the elastic deformation of the wave spring sheet 101 provides a preload force to ensure that the brush wire 104 maintains close contact with the rotor. From the perspective of stress distribution, the shape of the continuous mountains is designed to achieve uniform stress distribution and increase deformation resistance. From the perspective of fatigue life, materials with high fatigue life are selected to ensure the long-term reliability of the wave spring sheet 101 under high frequency and high load conditions.

[0084] Specifically, the design of the front baffle 103 and the rear baffle 102 follows the functional design, the maze effect and the principles of fluid mechanics, as well as mechanical design principles such as stiffness and deformation control. From the functional design point of view, when designing the front baffle 103 and the rear baffle 102, their specific functions in the sealing device are considered, including providing support, forming a seal, allowing the brush 104 to deflect, etc. From the maze effect, the resistance to fluid flow is increased and leakage is reduced through complex paths and structures. From the perspective of fluid mechanics, the groove shape of the maze groove 105 forms a maze effect by increasing the complexity of the airflow path, slowing down or even stopping the airflow, thereby reducing leakage. This design follows the principles of fluid mechanics and reduces the probability of gas leakage by increasing the resistance to gas flow and the complexity of the path. From the perspective of stiffness design, the height design of the front baffle 103 and the rear baffle 102 takes into account stiffness and deformation control to ensure that the brush 104 can maintain its shape and position in a high pressure difference environment to achieve effective sealing. In terms of deformation control, the height design of the front baffle 103 allows the brush filament 104 to tilt in the direction of movement, reducing excessive deformation; the height design of the rear baffle 102 prevents the brush filament 104 from deforming under pressure difference, ensuring its sealing effect.

[0085] Specifically, the brush 104 follows the principles of flexible design, sealing design, fluid mechanics and wear control design. From the perspective of flexible design, the brush 104 is made of highly flexible and wear-resistant materials, which can bend and deform under the action of external forces to adapt to the high-speed rotation of the rotor; through material selection and design, it is ensured that the brush 104 can play a role in a dynamic environment. From the perspective of fluid mechanics, the closely arranged brush 104 reduces gas leakage by increasing the resistance to gas flow. This is in line with the principles of fluid mechanics, by controlling the fluid path and resistance; the arrangement of the brush 104 increases the complexity of the gas flow path. From the perspective of wear control design, the selection of highly wear-resistant materials for the brush 104 can effectively reduce the friction and wear between the brush and the rotor and extend the service life.

[0086] Specifically, the main function of the labyrinth groove 105 is to reduce gas leakage through the labyrinth effect. The labyrinth effect refers to the fact that when the gas flows through these labyrinth grooves 105, it is forced to experience a complex and tortuous flow path, so that the kinetic energy and pressure of the gas are gradually dissipated, thereby slowing down the gas flow rate and reducing leakage. The labyrinth groove 105 is designed into various geometric shapes (square, circular, trapezoidal, etc.), which increase the complexity of the airflow path: Case 1 is a square labyrinth groove 105, in which the gas must pass through multiple right-angle turns, and the airflow will experience a change of direction at each turning point, which increases the flow resistance, dissipates the gas kinetic energy, and slows down the flow rate; Case 2 is a circular labyrinth groove 105, although the path of the gas in the circular labyrinth groove 105 is relatively smooth, the circular design causes the airflow direction to change continuously, which also increases the resistance. Case 3 is a trapezoidal labyrinth groove 105, and the width change of the trapezoidal labyrinth groove 105 makes the airflow path wide and narrow, which increases the complexity and resistance of the flow and forces the gas flow rate to further decrease. The number and spacing of the labyrinth grooves 105 can be adjusted according to actual working conditions: the spacing of the labyrinth grooves 105 is usually between 0.3-0.8 mm, and a smaller spacing can increase the resistance of the airflow and the complexity of the path; the number of the labyrinth grooves 105 can be 2-5, depending on the gas pressure and flow rate, and a greater number of labyrinth grooves 105 means that the airflow needs to pass through more paths, further reducing leakage.

[0087] The present invention provides a radial brush-labyrinth seal device inside a cycloid rotor engine, which is described in conjunction with the accompanying drawings and embodiments.

[0088] like Figure 1As shown in the three-dimensional diagram of the brush seal device of the present invention, the brush wire labyrinth seal device achieves an efficient sealing effect through the reasonable design and coordination of the front baffle 103, the rear baffle 102, the brush wire 104, the wave spring sheet 101, and the labyrinth groove 105. The labyrinth groove 105 of the front baffle 103 and the rear baffle 102 is designed to form a labyrinth effect, which significantly reduces the risk of gas leakage; the brush wire 104 with high flexibility and wear-resistant materials ensures long-term stability; the wavy wave spring sheet 101 provides continuous pressure to prevent sealing failure. The entire brush wire 104 sealing device has a compact structure and a stable connection, and is suitable for sealing cycloid rotor engines under high temperature and high pressure conditions.

[0089] The brush-type labyrinth seal device is composed of five components: a front baffle 103, a rear baffle 102, a brush 104, a wave spring sheet 101, and a labyrinth groove 105;

[0090] Front bezel 103: The front baffle plate 103 is located at the front of the device, adjacent to the front of the brush wire 104, and together with the rear baffle plate 102 and the brush wire 104, it forms a sealing structure; the height of the front baffle plate 103 is lower than that of the rear baffle plate 102, which can make the brush wire 104 have a certain inclination angle in the direction of movement, thereby guiding the brush wire 104 to follow the direction of the moving part, reducing the deformation and wear of the brush wire 104; because the front baffle plate 103 is shorter, when the brush wire 104 extends from a fixed position, the front baffle plate 103 will make the brush wire 104 tilt backwards, so that it can fit the surface of the moving part; the inclination angle directly reduces the vibration and deformation of the brush wire 104 during movement.

[0091] The front baffle 103 is designed with a labyrinth groove 105, and a plurality of labyrinth grooves 105 form a labyrinth effect, that is, when the combustion gas or other fluid passes through the front baffle 103, the labyrinth grooves 105 will force the gas flow path to become tortuous and complicated, and the tortuous path will slow down the gas flow, increase the resistance to the gas flow, and even force part of the gas flow to stop, so that the airflow deceleration and blocking effect can significantly reduce the risk of gas leakage and achieve a sealing effect; the shape of the labyrinth groove 105 can be designed to be a square, a circle, a trapezoid, etc. Various geometric shapes; the labyrinth grooves 105 are symmetrically distributed on the left and right, so that the gas flow is subjected to uniform resistance when passing through the front baffle 103; the spacing and number of the labyrinth grooves 105: the distance between the labyrinth grooves 105 on the same side is generally between 0.3-0.8mm, and the number of the labyrinth grooves 105 can be 2-5, and the parameters can be adjusted according to the specific gas pressure and flow rate to achieve the best labyrinth effect.

[0092] The front baffle 103 is made of a high-strength, corrosion-resistant metal material, which ensures the long-term stability and durability of the front baffle 103 in a high-temperature and high-pressure or low-temperature and low-pressure environment during the operation of the cycloidal rotor engine.

[0093] The connection method of the front baffle 103 and the rear baffle 102 is mechanical connection, which can be any one of bolts, clamps and welding; first, the front baffle 103 and the rear baffle 102 can be fixed together by bolts and nuts, the bolts pass through the pre-drilled holes of the front baffle 103 and the rear baffle 102, and the two are tightly connected by tightening the nuts; second, the front baffle 103 and the rear baffle 102 are clamped together using a specially designed clamp; third, spot welding is performed on the contact area of ​​the front baffle 103 and the rear baffle 102 to form a firm connection, and then continuous welding is performed along the contact edge of the front baffle 103 and the rear baffle 102 to ensure the stability and sealing of the structure;

[0094] The connection relationship between the front baffle plate 103 and the rear baffle plate 102 is through mechanical connection or welding, and the front baffle plate and the rear baffle plate form a stable overall structure; this overall structure provides stable support for the brush filaments 104, ensuring that the brush filaments 104 do not deform during operation, thereby effectively supporting and fixing the brush filaments 104, and ensuring the overall stability and sealing effect of the sealing device; the connection method between the front baffle plate 103 and the brush filaments 104 is fixed by high-performance welding or mechanical clamping; specifically, a special clamp is used between the front baffle plate 103 and the rear baffle plate 102 to fix the brush filaments 104; the brush filaments 104 are placed in the clamp, and then the clamp is tightened by bolts or buckles to firmly fix the brush filaments 104 between the front baffle plate 103 and the rear baffle plate 102. Furthermore, when fixing the brush 104, the clamp used can be U-shaped or other shapes, and the brush 104 is firmly fixed between the front baffle 103 and the rear baffle 102 by bolts or buckles; it is also necessary to use a high-strength, high-temperature-resistant and corrosion-resistant adhesive, such as epoxy resin or silicone, to evenly apply the adhesive on the contact area between the front baffle 103 and the rear baffle 102, and then place the brush 104 thereon, and after the adhesive is cured, the brush 104 can be firmly fixed between the front baffle 103 and the rear baffle 102. Through multiple fixation with mechanical clamps or adhesives, the brush 104 is firmly fixed between the front baffle 103 and the rear baffle 102 to prevent loosening or falling off under high pressure and high temperature conditions; the firm fixation of the brush 104 ensures that the brush seal device effectively prevents gas leakage during operation.

[0095] Tailgate 102: The rear baffle 102 is located at the rear of the sealing device, close to the rear of the brush wire 104, providing necessary support for the brush wire 104 to prevent it from being deformed under a high pressure difference; the height of the rear baffle 102 is very close to the height of the brush wire 104; through height matching, the stability of the brush wire 104 is maintained, and the necessary support is provided for the brush wire 104 under a high pressure difference environment to prevent the brush wire 104 from being significantly deformed;

[0096] The rear baffle 102 has a labyrinth groove 105, which cooperates with the front baffle 103 to form a labyrinth effect, which can slow down the gas flow and improve the sealing; the plurality of labyrinth grooves 105 can be square, circular, trapezoidal or other geometric shapes; specifically, the square labyrinth groove 105 means that each labyrinth groove 105 is rectangular or square, and the edges are straight lines; the circular labyrinth groove 105 means that each labyrinth groove 105 is circular or elliptical, and the edges are arcs; the trapezoidal labyrinth groove 105 means that each labyrinth groove 105 is a trapezoid, which is wide at the top and narrow at the bottom, or narrow at the top and wide at the bottom.

[0097] The labyrinth grooves 105 on the rear baffle 102 form a complex airflow path, forcing the gas to constantly change direction during the flow process, and the frequent changes in direction increase the gas flow resistance; because the gas must pass through these complex labyrinth grooves 105 paths, the flow path becomes tortuous and complex, causing the gas kinetic energy to be continuously consumed and the flow rate to slow down; thus forming a labyrinth effect, it is more difficult for the gas to pass through the sealing device, thereby reducing leakage. Specifically, the first situation is that when the gas enters the square labyrinth groove 105, it must pass through multiple right-angle turns. These turning points increase the gas flow resistance and force the gas flow path to become tortuous and complex; specifically, the second situation is that when the gas flows in the circular labyrinth groove 105, although the path is relatively smooth, the circular arc design also forces the gas to constantly change direction, increasing the flow resistance. Specifically, the third situation is that the changing width of the trapezoidal sealing grooves 104105 causes the gas path to continuously narrow or widen during the flow process, increasing the complexity and resistance of the flow path.

[0098] The height of the rear baffle 102 is very close to that of the brush 104, and can provide the necessary support for the brush 104 in a high pressure difference environment to prevent the brush 104 from being significantly deformed; the height of the rear baffle 102 is substantially the same as that of the brush 104; when the brush 104 is fixed between the front baffle 103 and the rear baffle 102, the top of the brush 104 is almost flush with the top of the rear baffle 102; based on the working environment of the sealing device and the material properties of the brush 104, it is ensured that the brush 104 can obtain sufficient support in a high pressure difference environment.

[0099] Specifically, under high pressure difference conditions, the brush filament 104 is easily deformed by the pressure; if the height of the brush filament 104 is much higher than the rear baffle 102, the free section of the brush filament 104 will be more easily bent or deformed due to lack of support; the highly close design ensures that the brush filament 104 is evenly supported under high pressure, reducing the risk of deformation; the highly matched design enables the rear baffle 102 to tightly support the brush filament 104 under high pressure environment; the brush filament 104 remains in a predetermined position and shape during operation; the brush filament 104 is highly close to the rear baffle 102, so that the brush filament 104 will not be obviously bent or deformed when affected by the pressure difference, thereby ensuring that the brush filament 104 can always fit closely to the surface of the moving parts to achieve a stable sealing effect; by providing sufficient support, the brush filament 104 can more effectively control the airflow and reduce gas leakage; the highly matched rear baffle 102 design reduces the deformation of the brush filament 104 under high pressure difference, thereby making the airflow path more controlled and further enhancing the sealing performance of the maze effect.

[0100] Brush 104: The brush filaments 104 are installed between the front baffle plate 103 and the rear baffle plate 102, and the brush filaments 104 extend outward to form a sealing barrier; the brush filaments 104 are cylindrical, and the diameter of each brush filament 104 is between 0.01 mm and 0.1 mm, mainly 0.07 mm, and the length is between 36 mm; the flexible design of the brush filaments 104 allows it to deflect with the movement direction of the rotor, thereby reducing friction and wear and achieving adaptive sealing;

[0101] The brush filaments 104 are evenly distributed during the arrangement process, and the bundles of brush filaments 104 are closely arranged to ensure that there are no obvious gaps in the sealing area; the brush filament bundles are arranged in a forked arrangement or a straight arrangement; the brush filaments 104 are cross-arranged to increase the density of the brush filaments 104 and reduce the gaps; the brush filaments 104 are cross-arranged in a forked arrangement, and this arrangement method can increase the density of the brush filaments 104 and reduce the gaps; the brush filaments 104 are arranged in sequence to ensure that the interval between each brush filament 104 is uniform and minimal.

[0102] The brush 104 is connected by high-performance welding and mechanical clamps between the front baffle 103 and the rear baffle 102; the brush 104 uses a special U-shaped or V-shaped clamp, and the clamp is fixed to the front baffle 103 and the rear baffle 102 by bolts and nuts; a high-strength adhesive is evenly applied to the contact area of ​​the front baffle 103 and the rear baffle 102 to fix the brush 104 thereon.

[0103] The transmission relationship between the brush wire 104 and each component is that the front baffle 103 and the rear baffle 102 achieve gas sealing isolation through the brush wire, and the brush wire 104 connects the two together; the matching relationship between the brush wire 104 and each component is that the brush wire 104 is tightly matched with the front baffle 103 and the rear baffle 102 to ensure that it does not fall off or deform under high-pressure environment; the high-flexibility material of the brush wire 104 adapts to the eccentric movement and high-speed rotation of the rotor, providing a continuous sealing effect.

[0104] Wave Spring 101: The wave spring sheet 101 is installed on the top of the rear baffle 102 to form a continuous wave spring sheet 101 structure, which provides pre-tightening force for the brush filaments 104 through elastic deformation, ensuring that the brush filaments 104 are always in close contact with the rotor surface during rotation; several wave spring sheets 101 are combined into a shape similar to a continuous mountain range, providing uniform and continuous pressure, being able to resist high-pressure deformation, and ensuring that the sealing device will not have spring failure under high-speed operation; the number of wave spring sheets 101 is 3-6, providing sufficient pre-tightening force to maintain close contact between the brush filaments 104 and the rotor.

[0105] The connection relationship of the wave spring sheet 101 is that the wave spring sheet 101 is fixed to the top of the rear baffle 102 by mechanical connection or welding; the wave spring sheet 101 is fixed to the top of the rear baffle 102 by bolts, and tightened by nuts to ensure firmness; then spot welding or continuous welding is performed at the contact points between the wave spring sheet 101 and the rear baffle 102 to ensure that the wave spring sheet 101 is stable.

[0106] The transmission relationship of the wave spring sheet 101 is that the wave spring sheet 101 transmits uniform and continuous pressure to the brush wire 104 through the rear baffle 102, ensuring that the brush wire 104 maintains a sealing effect under high-speed operation.

[0107] The matching relationship of the wave spring sheet 101 is a close fit between the wave spring sheet 101 and the rear baffle 102, ensuring that there is no loosening or failure under high pressure and high temperature environment; the wave-shaped design of the wave spring sheet 101 provides uniform pressure, adapts to the deformation and movement of the brush wire 104, and enhances the sealing effect.

[0108] like Figure 2 As shown, a cross-sectional view of a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention shows the key components of a labyrinth seal system, including a wave spring sheet 101, a front baffle 103, a rear baffle 102, a brush wire 104 and a labyrinth groove 105, forming a complex gas flow path, and achieving efficient sealing by increasing flow resistance and energy loss. The brush wire 104 further enhances the sealing effect, reduces leakage, and ensures that the system can still provide good sealing performance under high temperature, high pressure and high-speed rotation environments.

[0109] The wave spring sheet 101 is located at the top of the figure; it is used to provide a preload to ensure that the radial seal is in close contact with the rotor surface during operation to improve the sealing effect. Specifically, the front baffle 103 is located at the upper left side of the figure, and the front baffle 103 is fixed on the stator, and together with the rear baffle 102, closes the two ends of the labyrinth seal. Specifically, the rear baffle 102 is located at the upper right side of the figure, opposite to the front baffle 103, fixed on the stator, and closes the other end of the labyrinth seal. Specifically, the brush 104 is located at the lower left side of the figure, installed between the labyrinth grooves 105, and contacts the rotating rotor surface; the brush 104 is partially installed between the labyrinth grooves 105, and contacts the surface of the rotor to form a flexible physical barrier; the brush 104 is made of slender metal wire or synthetic material, and can be slightly bent and moved during rotation, so as to adapt to the slight deformation and eccentricity of the rotor and maintain a good sealing effect.

[0110] The stator part belongs to the labyrinth groove 105 which is fixed between the front baffle 103 and the rear baffle 102 and remains stationary.

[0111] like Figure 3-5 As shown in the figure, the design of the front baffle 103 and the rear baffle 102 and the labyrinth grooves 105 of square, circular and trapezoidal structures is shown. The arrangement of the labyrinth grooves 105 increases the flow path and complexity of the gas, and enhances the sealing effect. The brush wire 104 contacts the rotor surface in the labyrinth groove 105, and realizes dynamic sealing through elasticity and flexibility, adapts to the rotation and slight deformation of the rotor, and reduces friction and wear. The labyrinth grooves 105 of the front baffle 103 and the rear baffle 102 significantly reduce gas leakage by extending the path, increasing fluid resistance and generating eddy currents and turbulence, thereby achieving an efficient sealing effect.

[0112] like Figure 6 As shown, a radial brush-labyrinth seal device inside a cycloid rotor engine according to the present invention shows a working state in which the brush filament 104 bends and moves in response to the rotational motion of the rotor, and the brush filament 104 deflects and moves in the rotational direction of the rotor (marked by an arrow as the "rotor motion direction"). Specifically, the cross-sectional view in the figure shows the positional relationship between the brush filament 104, the rotor, the front baffle 103 and the rear baffle 102, and the structure of the sealing cavity; the motion diagram in the figure shows the deflection and movement process of the brush filament 104 when the rotor rotates, and the changes in the contact between the brush filament 104 and the rotor surface.

[0113] Specifically, Figure 6The structural relationship of the components in the figure is: the front baffle 103 and the rear baffle 102 are located in the upper part of the figure, forming a closed shell with a straight and angular design. The brush 104 is located in the lower part of the figure. The brush 104 is a flexible material that can bend, deflect, and follow; the brush 104 extends horizontally to the right, and a single brush 104 is in contact with the rotor surface and the cylinder body; the deflection of the brush 104 means that the brush 104 bends, deflects, and follows in the direction of the rotor movement as the rotor moves; the deflection of the brush 104 is caused by the friction between the brush 104 and the contact surface. The rotor is located in the lower part of the figure, and the arrow marked with "rotor movement direction" indicates its rotation direction; the rotor has a circular cross-section and drives the surrounding airflow when it moves; the rotor movement direction, that is, the arrow indicates the rotational movement direction of the rotor or the component connected to the brush 104.

[0114] Specifically, Figure 6 The connection relationship of the components in is: the front baffle 103 and the rear baffle 102 together form a sealed cavity; this sealed cavity is used to fix the positional relationship between the brush 104 and the rotor, that is, the upper part is connected by a fixed structure to maintain the stability of the entire brush-labyrinth seal structure; the brush 104 is fixed on one side of the sealed cavity and directly connected between the front baffle 103 and the rear baffle 102; one end of the brush 104 is fixed in the sealed cavity, and the other end is free to stretch and contact the surface of the rotor, allowing the brush 104 to deflect and bend during the rotation of the rotor. The rotor is located below the brush 104, and the direction of rotation of the rotor is shown by the arrow, usually clockwise or counterclockwise; when the rotor rotates, it will drive the brush 104 in contact with it to deflect and follow, and the brush 104 will bend and follow during the rotation to achieve the expected sealing function.

[0115] Furthermore, the sealed cavity formed by the front baffle 103 and the rear baffle 102 not only fixes the position of the brush filament 104, but also ensures the effective contact between the brush filament 104 and the rotor, while preventing external dust or other impurities (debris) from entering; one end of the brush filament 104 is fixed, so that the brush filament 104 can flexibly adapt to the surface of the rotor; the rotation of the rotor directly drives the deflection of the brush filament 104, and the brush filament 104 bends with the movement of the rotor, thereby increasing the contact pressure and coverage area with the surface.

[0116] Furthermore, the matching relationship between the brush 104 and the rotor is mainly reflected in two aspects: flexibility and contact pressure. In terms of flexibility, the brush 104 will deflect with the direction of the rotor's movement due to its flexibility; the flexible design enables the brush 104 to automatically adjust its angle and cling to the rotor surface, thereby achieving an effective sealing effect. In terms of contact pressure, when the rotor rotates, the brush 104 maintains continuous contact with the rotor surface; as the rotor rotates, the brush 104 bends to increase the contact area and contact pressure with the rotor surface, thereby enhancing the sealing effect and making it difficult for debris to enter the cylinder.

[0117] Furthermore, the coordination relationship between the brush 104 and the front and rear baffles (the front baffle 103 and the rear baffle 102) is mainly reflected in fixation and stability. One end of the brush 104 is fixed to the front baffle 103 or the rear baffle 102 to ensure that its position in the sealed cavity is stable and that the brush 104 does not loosen. The front baffle 103 or the rear baffle 102 provides the support required by the brush 104 to ensure that the brush 104 maintains a stable position during movement and does not deviate from the set track due to the rotation of the rotor.

[0118] Furthermore, the coordination relationship between the rotor rotation and the sealing cavity is mainly reflected in the rotor rotation process. From the perspective of rotor rotation, the sealing cavity is formed by the front baffle 103 and the rear baffle 102, in which the rotor rotates freely; the sealing cavity ensures continuous contact between the brush 104 and the rotor; when the rotor rotates in the sealing cavity, the brush 104 will deflect with the rotation direction of the rotor to form an adaptive seal. This adaptive process enables the brush 104 to flexibly adjust the contact pressure with the rotor surface, ensuring the consistency and reliability of the sealing effect. From the perspective of adaptive sealing, when the rotor rotates in the sealing cavity, the brush 104 will deflect with the rotation direction of the rotor to form an adaptive seal; this adaptive sealing process enables the brush 104 to flexibly adjust the contact pressure with the rotor surface, ensuring the consistency and reliability of the sealing effect.

[0119] In general, the brush 104, the rotor, the front baffle 103, the rear baffle 102 and the sealing cavity cooperate with each other to form a dynamic sealing system. The brush 104, with the fixed support of the front baffle 103 and the rear baffle 102, works in coordination with the rotation of the rotor to ensure that effective sealing is always maintained during the rotation of the rotor. This sealing system not only fixes the position of the brush 104, but also prevents external dust or other impurities (debris) from entering the sealing cavity, keeping the rotor system clean and running efficiently.

[0120] like Figure 7 As shown, the structure of the labyrinth seal device is: the front baffle 103 is located at the front of the device, and the rear baffle 102 is located at the rear of the device; the front baffle 103 and the rear baffle 102 form the main frame of the sealing cavity and provide support and fixed position. Flexible brush wires 104 are arranged in the labyrinth seal device and contact the rotor surface; the brush wires 104 are tightly attached to the rotor through the pre-tightening force provided by the wave spring sheet 101 to form a seal.

[0121] Furthermore, if Figure 7As shown, the combustion stroke-high pressure area is the high pressure area of ​​the airflow. High pressure gas is generated during the operation of the cycloidal rotor engine. The gas in this area has a high pressure and temperature and needs to be effectively isolated to prevent leakage. The exhaust stroke-low pressure area is the low pressure area of ​​the airflow, and the gas pressure is low; the high pressure area and the low pressure area are separated by the sealing effect of the brush wire 104 and the groove to ensure that the high pressure gas will not leak into the low pressure area, so as to ensure the efficiency and normal operation of the cycloidal rotor engine.

[0122] Furthermore, the separation of the high-pressure area and the low-pressure area will form a comprehensive effect. From the perspective of dynamic sealing, when the rotor rotates, the brush wire 104 adapts to the movement of the rotor through the preload provided by the wave spring sheet 101, always maintains close contact with the rotor, and forms a dynamic seal; the flexible design of the brush wire 104 reduces direct friction with the rotor, reduces wear, and prolongs the service life. From the perspective of multi-layer sealing effect, when the gas passes through the groove, it needs to change direction many times. Each change of direction increases the flow path and resistance, the kinetic energy is gradually dissipated, the flow rate slows down, the pressure is reduced, and the leakage is gradually reduced; multiple changes in direction form eddies and turbulence, increase the flow resistance and energy dissipation of the gas, and further reduce leakage. From the perspective of efficient isolation, through the dual effects of the brush wire 104 and the labyrinth groove 105, the high-pressure gas gradually slows down the flow rate and reduces the pressure during multiple changes in direction and kinetic energy dissipation, and it is difficult to leak smoothly into the low-pressure area; due to the reduction of high-pressure gas leakage, the low-pressure area can maintain a lower pressure, ensuring the smoothness and efficiency of the engine exhaust.

[0123] Furthermore, if Figure 7 As shown, the mark "rotor rotation direction" shows the rotation direction of the rotor, indicating the specific direction in which the rotor drives the surrounding airflow. The rotation of the rotor not only drives its own movement, but also drives the surrounding airflow, causing the airflow to flow along the rotation direction of the rotor. This driving effect makes the path of the airflow more complicated when passing through the labyrinth groove 105 and the brush wire 104, forming multiple direction changes and narrow channels, increasing the flow resistance and kinetic energy dissipation, and ultimately achieving an efficient sealing effect. When the rotor moves, the following direction of the brush wire 104 is always consistent with the movement direction of the rotor; when the rotary engine is running, oil will be sprayed into the air chamber, and the infiltrated fuel fills the entire brush-labyrinth device, and the brush wire 104 is also stained with fuel. At this time, the brush wire 104 can maintain close contact with the rotor or other contact surfaces during movement to prevent leakage of fuel or gas. The brush wire 104 cooperates with the labyrinth seal to further reduce leakage caused by rotation or vibration. On the other hand, the brush wire 104 can recover or wipe excess fuel to prevent excessive fuel from accumulating in one place. The brush wire can help evenly spread the fuel on the rotor surface to ensure continuous lubrication and prevent the occurrence of local dry friction.

[0124] The airflow path of the further rotor rotation is as follows:

[0125] S1. Airflow driving effect: The rotation direction of the rotor drives the surrounding airflow, causing the airflow to flow in a certain direction in the labyrinth sealing device; the rotation of the rotor not only drives its own movement, but also drives the surrounding airflow, causing it to flow along the rotation direction of the rotor; the driving effect of the rotor makes the path of the airflow more complicated when passing through the labyrinth groove 105 and the brush wire 104.

[0126] S2. Complex airflow path: Due to the rotation of the rotor, the airflow not only flows along the curved path designed by the grooves; the airflow is also driven by the rotation of the rotor and needs to adapt to the new flow path, resulting in multiple changes in direction; the airflow is driven by the rotation of the rotor and needs to constantly adjust the flow direction, which increases the flow path and flow resistance.

[0127] S3. Increased resistance and dissipation of kinetic energy: Driven by the rotation of the rotor, the airflow needs to constantly adjust its flow direction, which increases the flow path and flow resistance; the multiple direction changes of the airflow in a complex path increase the flow resistance and consume the kinetic energy of the airflow.

[0128] S4. Formation of eddies and turbulence: The rotation of the rotor causes the airflow to generate eddies and turbulence when passing through the labyrinth grooves 105 and the brush wires 104; the flow phenomena of eddies and turbulence consume the kinetic energy of the airflow; and as the kinetic energy of the airflow is gradually dissipated, the speed and pressure of the airflow will gradually decrease, reducing the leakage of high-pressure gas to the low-pressure area.

[0129] S5. Enhanced sealing effect: Due to the rotation of the rotor and the complex path design of the labyrinth seal, the airflow needs to go through multiple direction changes and narrow channels to form an efficient sealing effect; ensuring the gas isolation between the high-pressure area and the low-pressure area, and improving the performance of the sealing device.

[0130] like Figure 8 As shown, a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention shows a schematic diagram of a wave spring sheet 101, which has a wavy structure and a plurality of raised portions, the number of which is 3 to 6. The wave spring sheet 101 provides continuous pre-tightening force and elastic support for the brush filaments 104 through its elastic deformation, so that the brush filaments 104 can adapt to the movement and slight deformation of the rotor and maintain the sealing effect. When the rotor rotates at high speed, the elastic deformation of the wave spring sheet 101 can absorb and buffer external forces, reduce the wear of the brush filaments 104, and ensure the durability and reliability of the sealing device. The front baffle 103 and the rear baffle 102 provide a fixed position and support for the wave spring sheet 101, ensuring that it can deform and recover normally when subjected to force, thereby achieving pre-tightening and elastic support for the brush filaments 104.

[0131] like Figure 8As shown, the 3D model of the spring sheet and its working principle of resisting deformation are specifically divided into two parts: part a is the 3D model of the spring sheet, and part b is the principle of resisting deformation of the wave spring sheet 101 and the structure and working principle of the labyrinth seal. The front baffle 103 and the rear baffle 102 form a sealing cavity, and the brush wire 104 is tightly attached to the rotor under the preload of the wave spring sheet 101 to form a seal. When the airflow flows from the high-pressure area to the low-pressure area, it must go through multiple changes in direction and narrow channels, the path is extended, the flow resistance increases, eddies and turbulence are formed, the kinetic energy is gradually dissipated, the flow rate and pressure are reduced, and finally the leakage is reduced to achieve efficient sealing. The elastic deformation and adaptive adjustment of the brush wire 104 ensure the stability and reliability of the sealing effect.

[0132] Specifically, the structural features of the wave spring sheet 101 are as follows: the top of the wave spring sheet 101 is a natural shape in an unstressed state, presenting a regular wave-like curve; the middle of the wave spring sheet 101 represents the deformation of the spring sheet when it is subjected to a certain pressure, and the raised part is compressed by the external force; the bottom of the wave spring sheet 101 is in a further compressed state when subjected to the force generated by the movement of the rotor, and the raised part becomes flatter.

[0133] Specifically, the mutual cooperation relationship between the wave spring sheet 101 and other components is: first, the wave spring sheet 101 provides continuous pre-tightening force for the brush filament 104 through its elastic deformation, so that the brush filament 104 can adapt to the movement and slight deformation of the rotor and maintain the sealing effect; the raised part of the wave spring sheet 101 undergoes elastic deformation under the force generated by the movement of the rotor, absorbs and buffers external forces, and reduces the wear of the brush filament. Second, the front baffle 103 and the rear baffle 102 provide a fixed position and support for the wave spring sheet 101 to ensure that it can deform and recover normally when subjected to force; with the support of the front baffle 103 and the rear baffle 102, the wave spring sheet 101 realizes pre-tightening and elastic support for the brush filament 104.

[0134] Furthermore, the functions of the wave spring sheet 101 are as follows: First, it provides elastic restoring force. The wave spring sheet 101 is wavy when not under stress. The naturally shaped wave spring sheet 101 can provide initial elastic restoring force; when subjected to external force, the wave spring sheet 101 undergoes elastic deformation, and the convex part is compressed, converting the external force into elastic potential energy. Second, it provides preload force and elastic support. The wave spring sheet 101 provides continuous preload force for the brush wire 104 through elastic deformation in the sealing device, so that the brush wire 104 can be close to the rotor surface to maintain the sealing effect; when the rotor rotates at high speed, the elastic deformation of the wave spring sheet 101 can adapt to the slight deformation and eccentric movement of the rotor, reducing the wear of the brush wire 104. Third, the transmission and buffering of force. The force generated by the movement of the rotor is transmitted to the wave spring sheet 101 through the brush wire 104. The elastic deformation of the wave spring sheet 101 absorbs and buffers the external force, reducing the force directly acting on the brush wire 104, thereby reducing friction and wear; then the wave spring sheet 101 pushes the brush wire 104 back to its original position through the elastic restoring force, ensuring the continuity and stability of the sealing effect.

[0135] Furthermore, the wavy structure of the wave spring sheet 101 complicates the airflow path and increases the flow resistance. When the airflow passes through the narrow channel between the wave spring sheet 101 and the brush filament 104, it changes direction many times, forming eddies and turbulence, gradually dissipating kinetic energy, reducing flow velocity and pressure. This forms a multi-stage sealing structure, reduces airflow leakage, and achieves an efficient sealing effect. The airflow path formed by using the wave spring sheet 101 is as follows:

[0136] S1. Initial entry of airflow: When the gas enters the sealing device, the first thing it encounters is the combination of the wave spring sheet 101 and the brush wire 104; due to the wavy structure of the wave spring sheet 101 and the arrangement of the brush wire 104, the airflow must change direction many times; when the airflow enters the narrow channel formed by the spring sheet and the brush wire, it first encounters a protrusion (peak) of the spring sheet.

[0137] S2. Airflow flows through the spring sheet: The wave-like structure of the wave spring sheet 101 forces the airflow to fluctuate up and down as it passes through; these up and down fluctuations are equivalent to extending the path of the airflow, allowing the airflow to flow over a longer path.

[0138] S3. Complex path and increased resistance: When the airflow passes through the narrow channel between the wave spring sheet 101 and the brush filament 104, the flow path is further complicated; the airflow needs to change direction at the peak and valley of each wave, which increases the flow resistance; the airflow must bypass this protrusion and flow to the next depression (valley). In this process, the direction of the airflow changes for the first time; when the airflow bypasses the protrusion, the resistance increases because the flow path becomes more complicated; after passing the valley, the airflow needs to bypass the next protrusion again when it continues to flow, and the direction changes again; this process of changing direction is repeated on each wavy structure of the wave spring sheet 101, and the airflow constantly changes direction between peaks and valleys.

[0139] S4. Generation of eddies and turbulence: At each direction change point (peak and valley), the airflow is prone to form local rotating eddies due to the sudden change in direction. These eddies further increase the flow resistance of the airflow; due to the multiple changes in the direction of the airflow and the influence of the narrow channel, eddies are easily generated in each wavy area of ​​the wave spring sheet 101; with the multiple changes in the direction of the airflow and the complex path, the airflow becomes unstable and forms turbulence; turbulence increases the friction and energy dissipation of the airflow, further slowing down the airflow speed; and the instability and complex path of the airflow lead to the generation of turbulence, increasing the resistance and energy dissipation of the airflow.

[0140] S5. Energy dissipation and flow velocity reduction: In the process of passing through the wave spring sheet 101 and the brush wire 104, the kinetic energy of the airflow is gradually converted into heat energy and sound energy, reducing the kinetic energy of the airflow; due to the continuous dissipation of the kinetic energy of the airflow, the speed of the airflow gradually decreases, and the pressure also decreases accordingly.

[0141] S6. Forming a multi-stage seal: The multi-stage sealing structure of the wave spring sheet 101 and the brush wire 104 hinders the airflow at each stage, gradually reducing the pressure and flow rate of the airflow; since the airflow gradually dissipates energy in the multi-stage sealing structure, the amount of gas leaked in the end is very small, achieving effective sealing.

[0142] like Fig. 9 As shown, a radial brush-labyrinth seal device inside a cycloidal rotor engine according to the present invention shows two arrangements of brush wires 104: staggered (a), straight (b), and straight in the middle and staggered around (c).

[0143] The implementation steps of the brush wire 104 are as follows: First, fix the brush wire 104, fix one end of each brush wire 104 on the front baffle 103, and fix the other end on the rear baffle 102. The fixing method can be high-performance welding or mechanical buckle. Ensure that the spacing between each brush wire 104 meets the design requirements to ensure the tightness and neatness of the arrangement. Next, assemble the sealed cavity, tightly combine the front baffle 103 and the rear baffle 102 to form a sealed cavity. Use high-strength screws or rivets to fix the baffle to ensure the stability and sealing of the sealed cavity. Add a sealing strip or sealing ring at the joint of the front baffle 103 and the rear baffle 102 to further improve the sealing performance and prevent dust and impurities from entering the cavity. Finally, install it to the rotor system. The assembled brush wire 104 is installed in three ways: fork arrangement (a), straight arrangement (b), and straight arrangement in the middle and fork arrangement around (c). The brush wire 104 is installed on the rotor system to ensure that the brush wire 104 is effectively in contact with the rotor surface. By adjusting the installation positions of the front baffle plate 103 and the rear baffle plate 102 , it is ensured that the brush wire 104 can generate appropriate pressure and coverage area when the rotor rotates.

[0144] (1) Arrangement of brush filaments 104: cross-stack (a)

[0145] The brush filaments 104 are arranged in a staggered manner, and the brush filaments 104 are arranged in a V-shape; the brush filaments 104 are arranged in a staggered manner so that each brush filament 104 is staggered with the adjacent brush filaments 104, forming more intersections and paths; the brush filaments 104 in each row have a horizontal displacement relative to the brush filaments 104 in the adjacent row. This displacement prevents the airflow from passing through the brush filaments 104 along a straight path, but must constantly change direction in the narrow channels between the brush filaments 104.

[0146] Furthermore, due to the staggered arrangement of the brush filaments 104, the airflow must pass through a more complex path, and the airflow path must undergo multiple changes in direction, that is, the airflow needs to change direction when passing through each row of brush filaments 104; each change in direction will increase the flow resistance and energy loss. Specifically, due to the staggered arrangement of the brush filaments 104, the airflow must pass through a more complex path, thereby extending the gas flow path. Compared with the straight row, the airflow in the cross row needs to pass through a longer path to reach the other end; the extended path increases friction and energy loss, thereby reducing the leakage.

[0147] Furthermore, the staggered arrangement of the brush filaments 104 causes the airflow to form eddies and turbulence when passing through, which further increases the flow resistance and energy loss. When the airflow contacts the staggered brush filaments 104, due to the positional offset between each layer of brush filaments 104, the airflow cannot move in a straight line, but is constantly obstructed and guided by the brush filaments 104. The staggered arrangement of the brush filaments 104 causes the airflow to have an irregular movement path, forming eddies and turbulence.

[0148] Furthermore, in this staggered arrangement of brush filaments 104, when the airflow passes through each layer of brush filaments 104, it is forced to change direction, forming eddies and turbulence:

[0149] S1. Vortex formation at the entrance: When the airflow enters the brush filament 104 array, vortices are first formed around the first layer of brush filaments 104; these vortices rotate between the brush filaments 104, causing the airflow path to become more complicated;

[0150] S2. Staggered arrangement exacerbates turbulence: When the airflow passes through the second and subsequent layers of brush filaments 104, it is affected by the staggered arrangement, forming a more unstable turbulence; the random changes in airflow speed and direction further increase the flow resistance;

[0151] S3. Multiple detours and dispersions: The airflow continuously detours and disperses in the gaps between each layer of brush wires 104 , forming new eddies and turbulences each time it encounters a brush wire 104 , causing the overall path to become extremely complex.

[0152] Furthermore, the airflow path of the cross-arranged brush filaments 104 is as follows:

[0153] S1. Airflow contacts brush wires 104 at the entrance: When airflow enters the brush wire array 104, it first contacts the first layer of brush wires 104. These brush wires 104 are arranged in a staggered manner, so that the airflow cannot directly pass through the brush wire array.

[0154] S2. Airflow collision, dispersion and diversion: The airflow first encounters the first layer of brush filaments 104 and is divided into several small fluid units. These units are forced to change direction and bypass the first layer of brush filaments 104. These diverted airflow units encounter the second layer of brush filaments 104 again and are diverted and changed direction again. Since the brush filaments 104 are staggered, the airflow will find gaps to pass through, but these gaps are blocked by the second layer of brush filaments 104, so that the airflow needs to be further dispersed and diverted.

[0155] S3. Path complexity: Each layer of brush filaments 104 is staggered with the previous and next layers of brush filaments 104. This staggered arrangement requires the airflow to constantly change direction when passing through the brush filament 104 array, forming a complex path; the airflow will be blocked and diverted each time it encounters the brush filament 104, resulting in a complex path. When passing through the brush filament 104 array, the airflow needs to bypass multiple obstacles, forming a path that changes multiple times.

[0156] S4. Kinetic energy consumption and speed reduction: Since the airflow needs to constantly detour and change direction, its kinetic energy is consumed by the brush wires 104, resulting in a reduction in the airflow speed; the dense arrangement of the brush wires 104 causes the airflow to be obstructed multiple times when passing through, further reducing the speed of the airflow and increasing the difficulty of the airflow passing through the brush wire 104 array.

[0157] S5. The airflow is finally discharged: After multiple detours and dispersions, the airflow finally passes through the brush wire 104 array and enters the sealed cavity; at this time, the kinetic energy of the airflow is greatly weakened, and the flow rate is also significantly reduced, thereby achieving a sealing effect.

[0158] Furthermore, the cross-row brush wires 104 hinder the airflow: the brush wires 104 not only form a physical obstacle to the airflow mechanically, but also increase the resistance of the airflow. First, direct contact resistance is generated. When the airflow passes through the brush wires 104104, it rubs against the surface of the brush wires 104104, which directly slows down the speed of the airflow. Second, gap resistance is generated. The gap between each brush wire 104 is very small (no more than 0.007 mm), and the airflow must pass through these narrow gaps, which increases the difficulty and resistance of the flow. Third, energy dissipation. When the airflow changes direction multiple times and passes through narrow gaps, the kinetic energy is gradually converted into heat energy and sound energy, thereby dissipating part of the energy, causing the kinetic energy and pressure of the airflow to gradually decrease.

[0159] (2) Arrangement of brush filaments 104: sequential arrangement (b)

[0160] The brush wires 104 are arranged in a straight line, and the brush wires 104 are arranged in neat rows and parallel to each other; the brush wires 104 are arranged in a straight line so that the gas can pass through the brush wires 104 along a relatively straight path, and the complexity of the path is relatively low. Although the gas flow path is relatively simple, due to the small spacing between each brush wire 104 (no more than 0.007 mm), a certain sealing effect can still be provided.

[0161] In the arrangement of the brushes 104 in a straight line (b), the brushes 104 are arranged in neat rows and columns, and the intervals between the brushes 104 are equal. The airflow path of the brushes 104 in a straight line is relatively simple, but it also has a certain blocking effect. The airflow path of the brushes 104 in a straight line is as follows:

[0162] S1. The airflow contacts the brush wires 104 at the entrance: When the airflow enters the brush wire 104 array, it first contacts the first row of brush wires 104. Since the brush wires 104 are neatly arranged, the airflow will find a path to pass through along the gaps between the brush wires 104.

[0163] S2. Airflow dispersion: When the airflow passes through each row of brush filaments 104, it needs to be dispersed and flow along the gaps between the brush filaments 104. Since the brush filaments 104 are arranged neatly, the airflow path is relatively regular, but it is still hindered by the brush filaments 104.

[0164] S3. Simple airflow path: The airflow can find a relatively direct path between the brush wires 104 , but still needs to bypass each row of brush wires 104 .

[0165] S4. Flow resistance and kinetic energy consumption: Each row of brushes 104 will produce a certain resistance to the airflow. When the airflow passes through, the kinetic energy is consumed and the speed is slowed down. Although the path is relatively simple, the arrangement density and spacing of the brushes 104 determine the flow resistance of the airflow.

[0166] S5. Kinetic energy consumption: After being blocked by multiple rows of brush wires 104, the airflow finally passes through the array of brush wires 104 and enters the sealed cavity. Due to the arrangement density of the brush wires 104, the kinetic energy of the airflow is consumed and the flow rate is slowed down, thereby achieving a sealing effect.

[0167] S6. Final discharge: After being blocked by multiple rows of brush wires 104, the airflow finally passes through the array of brush wires 104 and enters the sealed cavity. Due to the arrangement density of the brush wires 104, the kinetic energy of the airflow is consumed and the flow rate is slowed down, thereby achieving a sealing effect.

[0168] Embodiment 1 Specific embodiment of the labyrinth seal in the radial brush-labyrinth seal device

[0169] (1) The labyrinth groove 105 in the front baffle 103 and the labyrinth effect produced by it

[0170] In a specific embodiment, the front baffle 103 is installed on a cycloidal rotor engine and tested under high temperature and high pressure conditions. First, the processed front baffle 103 is installed on the front of the brush seal device to form an integral sealing structure with the rear baffle 102 and the brush wire 104. Then, the sealing device is installed on the cycloidal rotor engine to verify the labyrinth groove 105 of the front baffle 103 and the labyrinth effect it produces.

[0171] The front baffle 103 is installed at the front of the brush seal device, and the height of the front baffle 103 is lower than that of the rear baffle 102; the front baffle 103 is made of high-strength, high-temperature-resistant and corrosion-resistant stainless steel. Three square labyrinth grooves 105 are processed on the front baffle 103, and the depth of each labyrinth groove 105 is 0.5 mm and the width is 0.3 mm. The distance between the labyrinth grooves 105 is 0.5 mm, ensuring that the labyrinth grooves 105 are evenly distributed; multiple labyrinth grooves 105 are arranged on the front baffle, and a plurality of labyrinth grooves 105 form a labyrinth effect.

[0172] The labyrinth grooves 105 are arranged symmetrically, and the gas is forced to change the flow path when passing through the front baffle 103. When the combustion gas or other fluid enters the first labyrinth groove 105, the gas flow speed slows down due to the tortuosity of the path. As the gas enters the second and third labyrinth grooves 105, the flow path becomes more complicated, the gas flow speed further slows down, and the flow resistance increases. In a complex airflow path, part of the gas will stagnate due to the slow flow speed, thereby forming a "gas plug", which further blocks the flow of subsequent gas.

[0173] Test verification: After passing through the labyrinth groove 105 of the front baffle 103, the gas flow rate is significantly reduced, and the flow rate is reduced by about 80%, effectively preventing gas leakage. Compared with the front baffle 103 without a groove design, the labyrinth effect formed by the present invention significantly improves the overall sealing effect of the sealing device and reduces the leakage.

[0174] Conclusion: This embodiment designs a labyrinth groove 105 on the front baffle 103, and utilizes the labyrinth effect to make the flow path of the combustion gas or other fluid tortuous and complex, thereby reducing speed, increasing flow resistance, and blocking the flow of part of the gas. Experimental results show that this design significantly reduces the risk of gas leakage, improves the overall sealing effect of the sealing device, and is suitable for the sealing of cycloid rotor engines under high temperature and high pressure conditions.

[0175] (2) Airflow path generated by the maze effect formed by the front baffle 103

[0176] S1. Initial gas inflow: When the combustion gas or other fluid enters the front baffle 103, it first encounters the labyrinth groove 105 on the front baffle 103, and the gas path begins to become tortuous; the gas enters the first labyrinth groove 105 and begins to change its originally straight flow path, slowing down and increasing flow resistance.

[0177] S2. Path tortuosity: When the gas flows in the first labyrinth groove 105, it is forced to flow in a tortuous manner along the shape of the labyrinth groove 105; after flowing out of the first labyrinth groove 105, the gas immediately enters the next labyrinth groove 105 (the second labyrinth groove 105), repeating the tortuous flow process and continuing to flow along the shape of the labyrinth groove 105; each time the gas passes through a labyrinth groove 105, the gas needs to constantly change direction, which increases the frictional resistance of the gas; each labyrinth groove 105 forces the gas to change direction, which increases the path length and complexity of the gas flow.

[0178] S3. Flow deceleration and increased resistance: During each change of direction, the kinetic energy of the gas will be lost and the flow speed will gradually slow down; the tortuous path and frequent changes in direction increase the resistance to gas flow, and the gas flow rate gradually slows down in each maze groove 105; the friction generated by the wall surface inside the maze groove 105 further increases the resistance to gas flow, causing continuous loss of gas kinetic energy.

[0179] S4. Formation of gas plug effect: Under low flow rate or high resistance conditions, part of the gas will stagnate in certain labyrinth grooves 105, forming a gas plug effect; the stagnant gas further blocks the flow of subsequent gas, increases the resistance to the subsequent gas flow, and forces more gas to slow down or stop flowing.

[0180] S5. Final outflow: After a series of tortuous flows and deceleration in the labyrinth grooves 105, the remaining gas finally flows out from the labyrinth grooves 105 of the front baffle 103; since the gas flow rate and flow rate are greatly reduced, the amount of leaked gas is significantly reduced and the sealing effect is enhanced.

[0181] (3) Specific airflow path of labyrinth seal

[0182] Furthermore, in the labyrinth seal device, after the gas enters from the high pressure area, it needs to pass through the passage formed between the multiple narrow labyrinth grooves 105. In this process, each change of direction consumes the kinetic energy of the gas, causing the gas to gradually slow down and reduce pressure.

[0183] S1. Air flow enters the high-pressure area: In the initial state, the gas is in the high-pressure area with higher pressure and kinetic energy, and the gas is driven into the inlet of the labyrinth seal device.

[0184] S2. The gas enters the labyrinth seal: The gas enters the entrance of the labyrinth seal and begins to pass through a plurality of narrow grooves and the channels formed by the grooves; then, the gas first encounters the first narrow labyrinth groove 105. The narrow size of the labyrinth groove 105 increases the resistance of the airflow, slowing down the airflow speed and converting part of the kinetic energy into heat energy.

[0185] S3. Airflow changes direction: After the airflow passes through the first labyrinth groove 105, it needs to change direction to continue moving forward. The change of direction increases the complexity of the flow path and further consumes the kinetic energy of the gas; each change of direction consumes part of the kinetic energy of the gas, causing the airflow speed to gradually slow down.

[0186] S4. Passing through the subsequent labyrinth grooves 105 and labyrinth grooves 105: The gas passes through the subsequent multiple narrow labyrinth grooves 105 in sequence; each labyrinth groove 105 forms an obstacle to the airflow, forcing the airflow to slow down. After passing through each labyrinth groove 105, the airflow needs to change direction multiple times, and each change of direction consumes more kinetic energy.

[0187] S5. Formation of eddies and turbulence: Every time the airflow changes direction, it is easy to form small eddies on the labyrinth groove 105 and the edge of the labyrinth groove 105; these eddies increase the complexity and resistance of the airflow path. As the airflow passes through more labyrinth grooves 105 and changes direction, the turbulence phenomenon becomes more obvious, and the turbulence increases the instability and kinetic energy consumption of the airflow.

[0188] S6. Deceleration and pressure reduction: As the airflow continuously passes through the multiple labyrinth grooves 105 and changes direction, the kinetic energy is continuously consumed and the airflow speed gradually slows down; the deceleration of the airflow is accompanied by a gradual decrease in pressure, and eventually the gas enters the low-pressure area from the high-pressure area.

[0189] S7. Passing through the low-pressure zone outlet of the labyrinth seal: The gas finally passes through the outlet of the labyrinth seal and enters the low-pressure zone. At this time, the kinetic energy and pressure of the airflow have been significantly reduced, and the flow speed of the gas has also been greatly slowed down.

[0190] Embodiment 2 Specific embodiment of the labyrinth groove shape (labyrinth groove 105)

[0191] In a specific embodiment, a radial brush-labyrinth sealing device is installed inside a cycloidal rotor engine described in the present invention. First, a labyrinth groove structure is machined on the front baffle 103 and the rear baffle 102. The groove type of the labyrinth groove 105 is designed to be bilaterally symmetrical, and ensure that the distance between the grooves is between 0.3 and 0.8 mm. The processing method can adopt precision milling, wire cutting or laser cutting and other processes to ensure the dimensional accuracy and shape of the groove type. Then, the front baffle 103 and the rear baffle 102 are assembled. The front baffle 103 and the rear baffle 102 are tightly connected by screws or rivets to form a closed sealed cavity. A sealing strip or sealing ring is added at the joint of the front baffle 103 and the rear baffle 102 to further improve the sealing performance and prevent dust and impurities from entering the cavity. Next, install the brush 104 and fix it between the front baffle 103 and the rear baffle 102 in a sequential manner, ensuring that the brush 104 cooperates with the labyrinth groove structure of the labyrinth groove 105 to form a complex airflow path; ensure that the spacing between each brush 104 meets the design requirements to ensure the tightness and neatness of the arrangement. Finally, install the brush 104 to the rotor system, and install the assembled brush 104 sequential sealing device to the rotor system to ensure that the brush 104 is in effective contact with the rotor surface; by adjusting the installation position of the front baffle 103 and the rear baffle 102, ensure that the brush 104 can generate appropriate pressure and coverage when the rotor rotates.

[0192] Furthermore, in the labyrinth seal device, after the gas enters from the high pressure area, it needs to pass through the channels formed between the multiple narrow labyrinth grooves 105. In this process, each change of direction consumes the kinetic energy of the gas, causing the gas to gradually slow down and reduce pressure. The specific airflow path of the labyrinth seal is as follows:

[0193] S1. Air flow enters the high-pressure area: In the initial state, the gas is in the high-pressure area with higher pressure and kinetic energy, and the gas is driven into the inlet of the labyrinth seal device.

[0194] S2. The gas enters the labyrinth seal: The gas enters the entrance of the labyrinth seal and begins to pass through a plurality of narrow grooves and the channels formed by the grooves; then, the gas first encounters the first narrow labyrinth groove 105. The narrow size of the labyrinth groove 105 increases the resistance of the airflow, slowing down the airflow speed and converting part of the kinetic energy into heat energy.

[0195] S3. Airflow changes direction: After the airflow passes through the first labyrinth groove 105, it needs to change direction to continue moving forward. The change of direction increases the complexity of the flow path and further consumes the kinetic energy of the gas; each change of direction consumes part of the kinetic energy of the gas, causing the airflow speed to gradually slow down.

[0196] S4. Passing through the subsequent labyrinth grooves 105 and labyrinth grooves 105: The gas passes through the subsequent multiple narrow labyrinth grooves 105 in sequence; each labyrinth groove 105 forms an obstacle to the airflow, forcing the airflow to slow down. After passing through each labyrinth groove 105, the airflow needs to change direction multiple times, and each change of direction consumes more kinetic energy.

[0197] S5. Formation of eddies and turbulence: Every time the airflow changes direction, it is easy to form small eddies on the labyrinth groove 105 and the edge of the labyrinth groove 105; these eddies increase the complexity and resistance of the airflow path. As the airflow passes through more labyrinth grooves 105 and changes direction, the turbulence phenomenon becomes more obvious, and the turbulence increases the instability and kinetic energy consumption of the airflow.

[0198] S6. Deceleration and pressure reduction: As the airflow continuously passes through the multiple labyrinth grooves 105 and changes direction, the kinetic energy is continuously consumed and the airflow speed gradually slows down; the deceleration of the airflow is accompanied by a gradual decrease in pressure, and eventually the gas enters the low-pressure area from the high-pressure area.

[0199] S7. Passing through the low-pressure zone outlet of the labyrinth seal: The gas finally passes through the outlet of the labyrinth seal and enters the low-pressure zone. At this time, the kinetic energy and pressure of the airflow have been significantly reduced, and the flow speed of the gas has also been greatly slowed down.

[0200] (1) Low speed operation

[0201] In a specific embodiment, when the rotor runs at a low speed, the airflow enters the labyrinth groove structure and passes through multiple curved paths, so that the kinetic energy of the airflow is gradually consumed, the airflow speed is slowed down, and the sealing effect is enhanced. The contact between the brush wire 104 and the rotor surface ensures the basic sealing effect during low-speed operation to prevent gas and lubricating oil leakage.

[0202] (2) Medium speed operation

[0203] In a specific embodiment, when the rotor runs at medium speed, the airflow forms eddies and turbulence in the labyrinth groove structure, further increasing the complexity of the airflow path and the flow resistance. The enhanced sealing effect effectively prevents the leakage of gas and lubricating oil during medium speed operation, while preventing external dust and debris from entering the sealed cavity.

[0204] (3) High-speed operation

[0205] In a specific embodiment, when the rotor is running at high speed, the kinetic energy of the airflow is significantly consumed when passing through the labyrinth groove structure, and the airflow speed is significantly slowed down. At high speed, the brush wire 104 forms a higher contact pressure and a larger contact area with the rotor surface, ensuring the strongest sealing effect at high speed. The airflow and debris inside and outside the cycloid rotor engine system increase, and the combination of the labyrinth groove structure and the brush wire 104 can effectively prevent external dust and debris from entering the sealing cavity.

[0206] Furthermore, in the labyrinth seal device, after the gas enters from the high pressure area, it needs to pass through the channels formed between the multiple narrow labyrinth grooves 105. In this process, each change of direction consumes the kinetic energy of the gas, causing the gas to gradually slow down and reduce pressure. The specific airflow path of the labyrinth seal is as follows:

[0207] S1. Air flow enters the high-pressure area: In the initial state, the gas is in the high-pressure area with higher pressure and kinetic energy, and the gas is driven into the inlet of the labyrinth seal device.

[0208] S2. The gas enters the labyrinth seal: The gas enters the entrance of the labyrinth seal and begins to pass through a plurality of narrow grooves and the channels formed by the grooves; then, the gas first encounters the first narrow labyrinth groove 105. The narrow size of the labyrinth groove 105 increases the resistance of the airflow, slowing down the airflow speed and converting part of the kinetic energy into heat energy.

[0209] S3. Airflow changes direction: After the airflow passes through the first labyrinth groove 105, it needs to change direction to continue moving forward. The change of direction increases the complexity of the flow path and further consumes the kinetic energy of the gas; each change of direction consumes part of the kinetic energy of the gas, causing the airflow speed to gradually slow down.

[0210] S4. Passing through the subsequent labyrinth grooves 105 and labyrinth grooves 105: The gas passes through the subsequent multiple narrow labyrinth grooves 105 in sequence; each labyrinth groove 105 forms an obstacle to the airflow, forcing the airflow to slow down. After passing through each labyrinth groove 105, the airflow needs to change direction multiple times, and each change of direction consumes more kinetic energy.

[0211] S5. Formation of eddies and turbulence: Every time the airflow changes direction, it is easy to form small eddies on the labyrinth groove 105 and the edge of the labyrinth groove 105; these eddies increase the complexity and resistance of the airflow path. As the airflow passes through more labyrinth grooves 105 and changes direction, the turbulence phenomenon becomes more obvious, and the turbulence increases the instability and kinetic energy consumption of the airflow.

[0212] S6. Deceleration and pressure reduction: As the airflow continuously passes through the multiple labyrinth grooves 105 and changes direction, the kinetic energy is continuously consumed and the airflow speed gradually slows down; the deceleration of the airflow is accompanied by a gradual decrease in pressure, and eventually the gas enters the low-pressure area from the high-pressure area.

[0213] S7. Passing through the low-pressure zone outlet of the labyrinth seal: The gas finally passes through the outlet of the labyrinth seal and enters the low-pressure zone. At this time, the kinetic energy and pressure of the airflow have been significantly reduced, and the flow speed of the gas has also been greatly slowed down.

[0214] Embodiment 3 Specific embodiments of labyrinth grooves 105 of different shapes on the front baffle 103 and the rear baffle 104

[0215] In different implementations, the labyrinth groove 105 provided on the front baffle plate 103 and the rear baffle plate 104 may be square, circular or trapezoidal.

[0216] (1) Square maze groove 105

[0217] In a specific embodiment, the grooves provided on the front baffle plate 103 and the rear baffle plate 104 are square labyrinth grooves 105. When the cycloid rotor engine is in operation, the square labyrinth grooves 105 ensure that the gas does not generate turbulence or uneven flow paths when flowing at the radial seal through uniform resistance, thereby reducing the risk of gas leakage and ensuring the pressure in the combustion chamber.

[0218] From the gas flow path, the compressed air and fuel mixture enters the combustion chamber through the intake duct. After ignition, the high-pressure gas formed drives the rotor to rotate. The radial sealing strip in the square labyrinth groove 105 can effectively seal the combustion chamber, prevent the leakage of high-pressure gas, and ensure the power output and efficiency of the engine. This sealing effect is crucial to maintaining the high-pressure environment in the combustion chamber, which directly affects the power and fuel efficiency of the cycloid rotor engine.

[0219] Furthermore, the rotor of the cycloid rotor engine rotates in the cylinder, and the edge of the radial seal is susceptible to wear due to high-frequency operation. The flow of gas at the edge will cause local wear concentration. The square labyrinth groove 105 can disperse stress, reduce wear concentration caused by high-frequency friction, and directly reduce wear on the edge of the radial seal strip.

[0220] (2) Circular maze groove 105

[0221] In a specific embodiment, the labyrinth groove 105 provided on the front baffle plate 103 and the rear baffle plate 104 is a circular labyrinth groove 105. When the cycloidal rotor engine is in operation, when the compressed air and fuel mixture enters the combustion chamber through the intake duct, part of the gas will contact the radial seal and try to pass through the circular labyrinth groove 105. Since the circular labyrinth groove 105 has no sharp edges, the airflow will enter the circular labyrinth groove 105 in a smooth manner.

[0222] From the gas flow path, the airflow flows along a curved path. The airflow path in the circular labyrinth groove 105 is curved. The curved path requires the gas to follow the groove curve trajectory when flowing in the circular labyrinth groove 105. When the gas flows in a curved path, its kinetic energy will gradually dissipate because the curved path increases the resistance to gas flow. In the circular labyrinth groove 105, the path length and friction resistance of the gas flow increase, and the speed of the airflow will slow down. The smooth curve shape reduces turbulence and turbulence, allowing the gas to flow in a more uniform manner and reducing pressure fluctuations. For several consecutive circular labyrinth grooves 105, the airflow will need to pass through each circular labyrinth groove 105, which further increases the path length and resistance of the airflow. The curved path of each circular labyrinth groove 105 will gradually dissipate the energy of the gas, thereby forming a gradually decreasing pressure gradient in each circular labyrinth groove 105.

[0223] Furthermore, after the airflow passes through the circular maze groove 105, due to the increase in energy dissipation and path resistance, the kinetic energy of the gas is greatly reduced, the flow velocity is reduced, and the remaining gas will eventually leave the circular maze groove 105 with lower kinetic energy and velocity; ultimately, the circular maze groove 105 effectively reduces gas leakage and achieves effective sealing.

[0224] (3) Trapezoidal labyrinth groove 105

[0225] In a specific embodiment, the labyrinth groove 105 provided on the front baffle 103 and the rear baffle 104 is a trapezoidal labyrinth groove 105. When the compressed air and fuel mixture enters the combustion chamber through the intake duct, part of the gas will contact the radial seal and try to pass through the trapezoidal labyrinth groove 105. The entrance of the trapezoidal labyrinth groove 105 is wider, and the airflow is easier to enter, but as the gas flow path gradually narrows, the flow characteristics of the gas change.

[0226] From the perspective of the gas flow path, when the gas flows in the trapezoidal labyrinth groove 105, the path gradually narrows, which increases the resistance to the gas flow and slows down the gas flow speed. The sidewalls and bottom of the trapezoidal labyrinth groove 105 guide the gas to flow along the shape of the labyrinth groove 105, causing the gas flow path to gradually narrow and the path length to increase. The gradually narrowing structure of the trapezoidal labyrinth groove 105 increases the friction resistance of the gas flow, thereby slowing down the flow speed of the gas.

[0227] Furthermore, for a number of continuous trapezoidal labyrinth grooves 105, the airflow will need to pass through each gradually narrowing trapezoidal labyrinth groove 105, further increasing the path length and resistance of the airflow; the gradually narrowing path of each trapezoidal labyrinth groove 105 will gradually dissipate the kinetic energy of the gas, thereby forming a gradually decreasing pressure gradient in each trapezoidal labyrinth groove 105. After the airflow passes through the trapezoidal labyrinth groove 105, due to the narrowing path and increased resistance, the kinetic energy of the gas is greatly reduced, the flow speed is reduced, and the remaining gas will eventually leave the groove with lower kinetic energy and speed.

[0228]

[0229]

[0230] Conclusion: The square labyrinth groove 105 finds a balance between sealing effect and flow smoothness, providing a good gas sealing effect while reducing stress concentration and wear; the circular labyrinth groove 105 performs better in reducing wear and has higher flow smoothness, but its sealing effect under high pressure conditions is slightly inferior to that of the square labyrinth groove 105; the trapezoidal labyrinth groove 105 has advantages in contact area and sealing effect, but has the problems of increased flow resistance and wear concentration, and is currently the best choice after improvement.

[0231] Example 4: Description of the structure of the front baffle 103 and the rear baffle 102 processed in one piece in different working conditions

[0232] The wave spring sheet 101 is fixed above the front baffle 103 and the rear baffle 102, and is designed to provide a constant preload force in both static and dynamic conditions; the wave spring sheet 101 applies downward pressure to the brush wire 104 in a static state, so that the brush wire 104 is in close contact with the rotor surface.

[0233] (1) Static condition (cycloid rotor engine not running)

[0234] In a specific embodiment, in a static working condition (when the engine is not running), the wave spring sheet 101 is installed above the front baffle 103 and the rear baffle 102, and applies a pre-tightening force to the brush wire 104 under static conditions through its elastic action; the brush wire 104 is ensured to always fit the rotor surface due to the pre-tightening effect of the wave spring sheet 101, preventing air or other media from leaking through the gap between the brush wire 104 and the rotor; the pre-tightening force of the wave spring sheet 101 makes the brush wire 104 fit the rotor surface tightly, forming a preliminary seal; the contact point of the preliminary seal ensures that there is no gap between the brush wire 104 and the rotor when the cycloid rotor engine is not running, laying the foundation for the sealing effect after starting. This pre-tightening contact can quickly form an effective seal when the engine is started, reducing the risk of leakage at the moment of starting.

[0235] The front baffle 103 and the rear baffle 102 are manufactured by an integrated molding process, and adopt a high-precision machining or casting process to ensure the coaxiality and surface flatness of the front baffle 103 and the rear baffle 102. The wave spring sheet 101 is installed above the front and rear baffles (103 and 102), and applies a pre-tightening force to the brush wire 104 under static conditions through its elastic action. Since there is no assembly seam, the sealing device has better integrity and reduces possible leakage paths.

[0236] The front baffle 103 and the rear baffle 102 are formed as one piece, which ensures the overall strength and stability of the entire sealing device; the front baffle 103 and the rear baffle 102 are formed as one piece, which reduces possible assembly errors and potential leakage paths at the joints; the size and position accuracy of the front baffle 103 and the rear baffle 102 are ensured, so that the sealing device can be more accurately installed in the cycloid rotor engine, thereby improving the overall sealing performance.

[0237] (2) Starting conditions (when the cycloid rotor engine is started)

[0238] In a specific embodiment, when the cycloid rotor engine is started, the rotor begins to turn from a stationary state to a rotating state; at this time, the surface speed of the rotor gradually increases, and the centrifugal force and airflow force generated exert initial mechanical stress on the sealing device; because the wave spring sheet 101 has applied a pre-tightening force to the brush wire 104 under static working conditions, the brush wire 104 is closely attached to the rotor surface. Further, when the cycloid rotor engine is started, this pre-tightening force ensures that the brush wire 104 is immediately in close contact with the rotor surface to form a preliminary seal to prevent leakage when the rotor just starts to rotate; as the rotor starts to rotate, the brush wire 104 relies on the pre-tightening force of the wave spring sheet 101 to quickly form a sealing effect to prevent gas leakage.

[0239] Since the front baffle 103 and the rear baffle 102 are integrally processed, the overall strength and stability of the entire sealing device are guaranteed. When the cycloid rotor engine is started, the rotation of the rotor will generate initial mechanical stress on the sealing device; the integrally processed front baffle 103 and rear baffle 102 structure has higher mechanical strength, can effectively withstand these stresses, and maintain structural integrity. Due to the high precision and stability of the integral processing, the front baffle 103 and the rear baffle 102 will not deform or displace during the startup process, ensuring that the brush filament 104 can always maintain stable contact with the rotor surface and maintain the initial sealing effect.

[0240] (3) Normal operating conditions (when the cycloid rotor engine rotates at high speed)

[0241] When the cycloid rotor engine rotates at high speed, the brush wire 104 can always fit closely to the rotor surface due to the preload and deformation resistance provided by the wave spring sheet 101. The brush wire 104 effectively separates the high-pressure area of ​​the combustion shield from the low-pressure area of ​​the exhaust shield, forming a physical barrier to prevent high-pressure gas from leaking into the low-pressure area, ensuring efficient sealing. The high flexibility of the brush wire 104 and the continuous preload of the wave spring sheet 101 enable it to adapt to the high-speed rotation and slight deformation of the rotor and maintain the sealing effect.

[0242] Furthermore, as the rotor rotates at high speed, the gas passes through the complex path of the labyrinth grooves 105 and the brush wires 104 on the front and rear baffles 102. The staggered arrangement of the labyrinth grooves 105 and the structure of the labyrinth grooves 105 require the gas to change direction multiple times during the flow process and gradually dissipate kinetic energy. When the gas passes through the labyrinth grooves 105 and the brush wires 104, the kinetic energy is gradually dissipated, forming vortices and isobaric expansion, causing the air flow velocity to gradually decrease, and finally achieving a sealing effect. The labyrinth grooves 105 on the front baffle 103 and the rear baffle 102 are staggered to form a complex gas flow path, which increases the resistance and kinetic energy dissipation of the air flow. When the gas passes through the labyrinth grooves 105 and the brush wires 104, due to multiple changes in the path and the expansion of the labyrinth grooves 105, vortices are formed, and the kinetic energy of the air flow is gradually dissipated, resulting in a decrease in velocity, and finally achieving a sealing effect.

[0243] When the cycloid rotor engine is running at high speed, the wave spring sheet 101 exhibits good anti-deformation ability under high-speed rotation conditions. The wave spring sheet 101 can maintain its shape and elasticity under high-frequency vibration and centrifugal force, and continuously provide preload force, so that the brush wire 104 always clings to the rotor surface; the preload force and anti-deformation ability provided by the wave spring sheet 101 enable the brush wire 104 to adapt to the high-speed movement and slight deformation of the rotor, prevent seal failure, and ensure efficient sealing effect.

[0244] (4) High temperature and high pressure conditions

[0245] Under high temperature and high pressure environment, the materials of the front baffle 103 and the rear baffle 102 will expand and contract due to heat and cold. The integrated structure of the front baffle 103 and the rear baffle 102 has better thermal stability and uniformity, and can adapt to the expansion at high temperature and the contraction at low temperature. The integrated structural design allows the front baffle 103 and the rear baffle 102 to be evenly stressed during thermal expansion and contraction, avoiding deformation differences in different parts and maintaining the stability of the overall structure and the sealing effect. Due to the high stability of the integrated structure, the brush 104 can always remain in the designed position and maintain close contact with the rotor surface, thereby effectively maintaining the sealing performance. The wave spring sheet 101 is usually made of highly elastic and heat-resistant materials, which can maintain its elasticity and preload under high temperature and high pressure environments. Under high temperature and high pressure, the wave spring sheet 101 continuously provides preload, so that the brush 104 is always in close contact with the rotor surface to ensure the sealing effect.

[0246] (5) Low temperature and low pressure conditions

[0247] Under low temperature conditions, the materials of the front baffle 103 and the rear baffle 102 shrink, and the integrated structure ensures that the brush 104 is in close contact with the rotor surface, avoiding gaps and maintaining sealing performance. The front baffle 103 and the rear baffle 102 are usually made of alloy materials with good shrinkage adaptability in low temperature environments. Through integrated processing and molding, the stability and uniformity of the materials of the front baffle 103 and the rear baffle 102 at low temperatures are ensured. The integrated structural design allows the front baffle 103 and the rear baffle 102 to be evenly stressed during the low-temperature shrinkage process, avoiding deformation differences in different parts, and maintaining the stability of the overall structure and the sealing effect.

[0248] Furthermore, the integrated structure of the front baffle 103 and the rear baffle 102 can ensure that the brush 104 remains in the designed position and is in close contact with the rotor surface, ensuring effective sealing in a low-temperature environment. The wave spring sheet 101 continues to provide preload force in a low-temperature and low-pressure environment, so that the brush 104 is in close contact with the rotor surface; the wave spring sheet 101 material can still maintain elasticity and preload force in a low-temperature environment, ensuring close contact between the brush 104 and the rotor; in a low-temperature and low-pressure environment, the preload force of the wave spring sheet 101 enables the brush 104 to adapt to the contraction changes of the rotor and maintain the sealing effect.

[0249]

[0250] Test verification 1: Under static working conditions, the overall structural stability and high precision of the sealing device are ensured by the integrated processing of the front baffle 103 and the rear baffle 102. The preload force provided by the wave spring sheet 101 enables the brush wire 104 to maintain close contact with the rotor surface when not running, ensuring the initial sealing effect and laying the foundation for efficient sealing after the cycloid rotor engine is started. This design not only improves the reliability of the sealing device, but also reduces the potential risk of leakage, ensuring the stable operation of the cycloid rotor engine under various working conditions.

[0251] Test Verification 2: When the cycloid rotor engine is started, the rotor begins to rotate, and the brush wire 104 relies on the preload force of the wave spring sheet 101 to cling to the rotor surface, quickly forming a preliminary seal to prevent initial gas leakage. The structure of the integrated front baffle 103 and rear baffle 102 can withstand the initial mechanical stress during the startup process, maintain stable contact between the brush wire 104 and the rotor, and ensure the efficient sealing effect of the sealing device during the engine startup phase. This design not only improves the reliability of the sealing device, but also reduces the risk of leakage at the moment of startup, providing a guarantee for the stable operation of the cycloid rotor engine.

[0252] Test Verification 3: When the cycloidal rotor engine rotates at high speed, the brush wire 104 relies on the preload and anti-deformation force provided by the wave spring sheet 101 to fit tightly to the rotor surface, separate the high-pressure area and the low-pressure area, and maintain the sealing effect. The gas passes through the complex path of the labyrinth groove 105 and the brush wire 104, and the kinetic energy is gradually dissipated, forming eddy currents and isobaric expansion, and finally achieving a sealing effect. The wave spring sheet 101 exhibits good anti-deformation ability under high-speed rotation conditions, allowing the brush wire 104 to adapt to the high-speed movement and slight deformation of the rotor, ensuring an efficient sealing effect.

[0253] Test verification 4: Under high temperature and high pressure conditions, the integrated structure of the front baffle 103 and the rear baffle 102 can adapt to thermal expansion and contraction changes due to its good thermal stability and uniformity, and maintain the effective sealing of the brush wire 104. The wave spring sheet 101 provides continuous preload force under high temperature and high pressure environment, so that the brush wire 104 always clings to the rotor surface, adapts to the thermal expansion and contraction changes of the rotor, and ensures the sealing effect.

[0254] Test verification 5: Under low temperature and low pressure conditions, the integrated structure of the front baffle 103 and the rear baffle 102 can adapt to the shrinkage changes under low temperature due to its good thermal stability and uniformity, and maintain the effective sealing of the brush wire 104. The wave spring sheet 101 provides continuous pre-tightening force under low temperature and low pressure environment, so that the brush wire 104 is close to the rotor surface, adapting to the shrinkage changes of the rotor and ensuring the sealing effect.

[0255] Example 5 Brush seal in radial brush-labyrinth seal device

[0256] (1) Cycloid rotor engine running at low speed

[0257] When the cycloid rotor engine is in low-speed operation, the rotor speed is relatively slow. Low-speed operation usually occurs during the startup phase of the cycloid rotor engine, idling or low-load conditions. Due to the low speed, the temperature of the sealing system of the cycloid rotor engine is also relatively low. This is because at low speeds, the heat brought by friction and airflow is less, and the heat load of the entire system is lower.

[0258] In a specific embodiment, under the condition of low speed operation, the cycloid rotor engine has a low rotation speed and a low system temperature, the brush wire 104 will be slightly deflected, and the slow rotation of the rotor drives the brush wire 104 to slightly deflect. Although the deflection amplitude is small, the contact between the brush wire 104 and the rotor surface is still stable and continuous.

[0259] From the slight deflection of the brush 104, the slow rotation of the rotor drives the brush 104 to slightly deflect. Due to the low rotation speed, the deflection amplitude of the brush 104 is small. The flexible design of the brush 104 enables it to adapt to the rotation direction of the rotor. Although the deflection amplitude is small, it can still maintain effective contact with the rotor surface. The contact between the brush 104 and the rotor surface is continuous and stable, and the slight deflection ensures that the brush 104 can still play its sealing role when running at a low speed.

[0260] In terms of flexibility, the brush wire 104 is in close contact with the rotor surface through flexibility to achieve effective sealing. When running at a low speed, the gas and lubricating oil in the sealing cavity will not leak easily, so as to maintain the stable operation of the system.

[0261] From the internal seal of the cycloid rotor engine, the gas and lubricating oil in the sealed cavity will not leak easily under low-speed conditions; the flexibility and adaptability of the brush wire 104 enable it to form an effective seal with the rotor surface to maintain the stability of the internal medium. The brush wire sealing effect is particularly important during low-speed operation, because the pressure difference between the rotor and the sealed cavity is small at this time, and the effective contact and sealing of the brush wire 104 can prevent the internal medium from escaping.

[0262] In terms of dust and impurity prevention, when running at low speed, the intrusion of external dust or debris is small. The sealed cavity and the brush wire 104 work together to form an effective barrier to prevent external impurities from entering the system and keep the system clean. The sealed cavity can effectively prevent these impurities from entering. The sealed cavity formed by the front baffle 103 and the rear baffle 102 provides a physical barrier to prevent external impurities from entering the cavity. The brush wire 104 itself also plays a certain barrier role, forming a protective barrier between the rotor surface and the external environment, further preventing external dust and debris from entering the system.

[0263] (2) Cycloid rotor engine running at medium speed

[0264] Under the condition of medium speed operation, the operation of the cycloid rotor engine is characterized by moderate speed and moderate system temperature. The cycloid rotor engine operates within the medium speed range and the rotor speed is moderate. At this time, the engine operates in a normal working state, which is suitable for general operation and operation under load. When running at medium speed, the sealing system temperature of the cycloid rotor engine is moderate. The pressure of lubricating oil and gas is within the normal range, and the heat load is moderate, which ensures the stable operation of the system under standard working conditions.

[0265] In a specific embodiment, as the rotor rotates at a medium speed, the deflection amplitude of the brush filaments 104 increases, and the bending degree is further enhanced. The bending and deflection of the brush filaments ensure that they are in close contact with the rotor surface, forming a stronger sealing effect.

[0266] From the perspective of increased deflection of the brush 104, the medium-speed rotation of the rotor causes an increase in the deflection amplitude of the brush 104. As the rotation speed increases, the degree of bending of the brush 104 in the direction of rotor movement increases. As a result, the deflection and contact cause the bending of the brush 104 to further increase the contact area with the rotor surface. Due to the flexibility of the brush 104 material, it can be adaptively adjusted with the direction of rotor rotation to ensure close contact.

[0267] In terms of the increase in contact area and pressure, the bending of the brush 104 increases the contact area and contact pressure with the rotor surface, further enhancing the sealing effect. The increased contact area and pressure can effectively prevent the leakage of gas or lubricating oil during medium-speed operation. The gas and lubricating oil in the sealing cavity are tightly sealed by the brush 104 under medium pressure, reducing the risk of leakage. In terms of long-term sealing, the brush 104 continues to closely contact the rotor surface, ensuring the continuity and reliability of the sealing effect.

[0268] In terms of preventing impurities from entering, when running at medium speed, the continuous contact between the brush 104 and the rotor surface and the adaptive seal can effectively prevent external dust and debris from entering the sealed cavity. The sealed cavity is formed by the front baffle 103 and the rear baffle 102, which provides a physical barrier to prevent the intrusion of external impurities. The close contact of the brush 104 further enhances this protection. When running at medium speed, the airflow inside the system is strong, and the dust and debris in the external environment may increase. The brush 104 and the sealed cavity work together to ensure that these impurities are blocked out and the inside of the system is kept clean. When running at medium speed, the airflow inside the system is strong, and the dust and debris in the external environment may increase. The brush 104 and the sealed cavity work together to ensure that these impurities are blocked out and the inside of the system is kept clean.

[0269] (3) Cycloid rotor engine high-speed operation

[0270] Under high-speed operation, the cycloid rotor engine is running at a high speed under the conditions of high speed and high system temperature. At this time, the cycloid rotor engine is running at a high load or maximum power state, which is suitable for high-speed operation or heavy load conditions. Due to high-speed operation, the temperature of the system is high. At high speed, the heat brought by friction and airflow increases, and the pressure of internal gas and lubricating oil also increases accordingly.

[0271] In a specific embodiment, as the rotor rotates at high speed, the deflection amplitude of the brush filaments 104 reaches a maximum, and the bending degree increases significantly. The significant bending and deflection of the brush filaments ensure that they can flexibly adapt to the high-speed movement of the rotor and maintain close contact with the rotor surface. The bending of the brush filaments 104 increases the contact area and contact pressure with the rotor surface, forming the strongest sealing effect. When running at high speed, the high contact pressure of the brush filaments can effectively prevent the leakage of gas and lubricating oil, ensuring the stability of the inside of the sealing cavity.

[0272] From the maximum deflection of the brush 104, when rotating at high speed, the brush 104 deflects to the maximum extent driven by the rotor. The high-speed movement of the rotor significantly increases the bending degree of the brush 104. From the deflection and contact, the brush 104 bends greatly along the rotation direction of the rotor and maintains close contact with the rotor surface. This large deflection ensures that the brush 104 can flexibly adapt to the high-speed movement of the rotor.

[0273] In terms of contact pressure and contact area, the cycloid rotor engine forms a higher contact pressure and a larger contact area with the rotor surface at high speed. The bending and pressure increase of the brush 104 enhance the sealing effect. The flexible design of the brush 104 ensures that it can flexibly adapt to the high-speed movement of the rotor and provide reliable sealing.

[0274] In terms of preventing leakage, during high-speed operation, the high contact pressure of the brush wire 104 can effectively prevent the leakage of gas or lubricating oil. The high-pressure gas and lubricating oil in the sealed cavity are tightly sealed by the brush wire to prevent escape.

[0275] In terms of efficient dust and impurity prevention, when the system is running at high speed, the airflow and debris inside and outside the sealing system increase. High-speed airflow and rotor movement may bring more external dust and debris. The sealing cavity is formed by the front baffle 103 and the rear baffle 102, which provide a physical barrier to prevent the intrusion of external impurities. The brush 104 can still maintain a seal with the rotor surface during high-speed rotation. The close contact and adaptive seal of the brush 104 can effectively prevent external dust and debris from entering the sealing cavity, keeping the system running efficiently and clean. Even under high-speed operation, the system can maintain good working condition.

[0276]

[0277] Test verification conclusion: Under different working conditions, the radial brush-labyrinth seal device forms a dynamic sealing system through the cooperation of the brush wire 104, the rotor, the front baffle 103, the rear baffle 102 and the sealing cavity. Through the coordinated work of the above components, the radial brush-labyrinth seal device can provide a stable and reliable sealing effect under different operating conditions of the cycloid rotor engine, ensuring the efficient operation and long service life of the cycloid rotor engine.

[0278] Example 6 Example of Rotor Rotation and Follow-up Deflection of Brush 104

[0279] In a specific embodiment, in a high-performance cycloid rotor engine, in order to improve the sealing effect, a combined structure of brush wires 104 and labyrinth grooves 105 is used. The friction force generated by the rotation of the rotor causes the brush wires 104 to deflect.

[0280] Before conducting a sealing test, prepare the materials first: the rotor is made of a high-strength alloy material with wear-resistant and high-temperature resistant characteristics; the surface of the rotor is precisely machined to ensure smoothness and wear resistance. The brush wire 104 uses a flexible and highly elastic material, such as a high-strength synthetic fiber or metal wire; the brush wire 104 has a diameter of 0.1 mm and a length of 10 mm, and is densely arranged, with hundreds of brush wires 104 per square centimeter. The labyrinth groove 105 is made of a high-temperature and wear-resistant alloy material, and is designed as multiple curved and narrow channels. The wave spring sheet 101 is made of a high-elastic alloy material with a wavy structure, and each wave has a peak height of 2 mm, a valley depth of 2 mm, and a wave spacing of 4 mm.

[0281] Before conducting a sealing test, specific installation is performed: first, the brush wire 104 is installed and fixed in the groove of the labyrinth groove 105 to ensure that the brush wire 104 is in contact with the rotor surface; the brush wire 104 forms a preliminary seal with the rotor surface through the pre-tightening force provided by the wave spring sheet 101; then the rotor is installed and installed in the engine so that it can rotate freely to ensure that there is appropriate contact pressure between the rotor surface and the brush wire 104; then the labyrinth groove 105 is installed and installed between the front and rear baffles to form a sealed cavity; and then the labyrinth groove 105 and the brush wire 104 are arranged neatly and fit closely with the rotor surface.

[0282] In a specific embodiment, the cycloid rotor engine is started, the rotor begins to rotate, and friction is generated between the surface of the rotor and the brush wire; the direction of the friction force is consistent with the rotation direction of the rotor, and acts on the brush wire 104, pushing the brush wire 104 to deflect in the rotation direction of the rotor. Due to its flexible material properties, the brush wire 104 bends and deforms under the action of friction. As the rotor continues to rotate, the brush wire 104 gradually deflects in the rotation direction of the rotor to form a dynamic seal; the contact area and contact angle between the deflected brush wire 104 and the rotor surface change, so that the brush wire 104 fits the rotor surface more closely; the closer contact increases the resistance of the gas passing through the gap of the brush wire 104, thereby reducing gas leakage.

[0283] Furthermore, in terms of dynamic adaptability, the deflection of the brush 104 enables it to dynamically adapt to the slight deformation and irregularity of the rotor, maintaining a continuous sealing effect; the elastic deformation of the wave spring sheet 101 provides a continuous preload, so that the brush 104 can effectively respond to the changes of the rotor under different working conditions. Finally, under high temperature and high pressure environment, the combined structure of the brush 104 and the labyrinth groove 105 effectively reduces gas leakage and achieves efficient sealing through path complexity, increased flow resistance, and the formation of eddies and turbulence.

[0284]

[0285]

[0286] Verification test conclusion: The relationship between the rotation of the rotor and the deflection of the brush 104 is achieved through the transmission of friction and the flexible response of the brush 104. The friction generated by the rotation of the rotor pushes the brush 104 to deflect, and the contact between the deflected brush 104 and the rotor surface is enhanced, the sealing effect is improved, the gas leakage is effectively reduced, and the high efficiency performance of the sealing device is ensured.

[0287] Embodiment 7 Specific embodiment of the wave spring sheet 101 in the radial brush-labyrinth seal device

[0288] In a specific embodiment, the wave spring sheet 101 realizes continuous pre-tightening force and elastic support for the brush wire under high temperature and high pressure conditions through its wave-shaped structure and high elasticity and high heat resistance material design. The wave-shaped structure of the wave spring sheet 101 complicates the airflow path, increases flow resistance, generates eddies and turbulence, gradually dissipates airflow energy, reduces leakage, and ensures the efficient sealing effect and durability of the sealing device.

[0289] Specifically, the manufacturing and assembly method of the wave spring sheet 101 is: select stainless steel materials with high elasticity and high heat resistance, cut into rectangular sheets with a length of 40 mm and a width of 10 mm; use precision molds to process the stainless steel sheets into a wave-like structure. The peak height of the wave is 2 mm, the valley depth is 2 mm, and the wave spacing is 4 mm; after processing, the wave spring sheet 101 has a uniform wave shape, and each wave structure is symmetrically arranged.

[0290] Specifically, the specific installation method of the wave spring sheet 101 is: a fixing clip is installed at one end of the wave spring sheet 101 to fix the wave spring sheet 101 to the inner side of the front and rear baffles; the fixing clip is fixed with high-strength screws and nuts to ensure that the wave spring sheet 101 will not loosen under high temperature and high pressure. The other end of the wave spring sheet 101 contacts the brush wire 104, and provides continuous pre-tightening force for the brush wire through its elastic deformation, so that the brush wire 104 is close to the rotor surface; ensure that the contact between the wave spring sheet 101 and the brush wire 104 is uniform to avoid excessive local pressure causing wear of the brush wire 104.

[0291] In a specific embodiment, when the cycloid rotor engine is not running, the spring sheet maintains a natural wavy structure, and the brush wires are initially in contact with the rotor surface through the preload force of the wavy spring sheet 101. When the cycloid rotor engine is started, the rotor begins to rotate, and the brush wires 104 are tightly attached to the rotor surface due to the elastic support of the wavy spring sheet 101; the wavy structure of the wavy spring sheet 101 allows the brush wires to adapt to the initial movement of the rotor to form a preliminary seal.

[0292] In a specific embodiment, when the cycloid rotor engine rotates at high speed, the wave spring sheet 101 continuously provides pre-tightening force to the brush wire 104 through its elastic deformation, so that the brush wire 104 adapts to the high-speed rotation and slight deformation of the rotor and maintains the sealing effect. The wave-like structure of the wave spring sheet 101 causes the airflow to change direction multiple times when passing through, forming a complex flow path, increasing flow resistance, generating eddies and turbulence, gradually dissipating airflow energy, reducing airflow speed and pressure, and reducing leakage.

[0293] In a specific embodiment, under high temperature and high pressure environment, the high heat resistance and high elasticity of the wave spring sheet 101 material ensure that it can withstand environmental changes and maintain elastic deformation ability; the wave spring sheet 101 continuously provides pre-tightening force for the brush wire 104 to ensure the stability and reliability of the sealing effect.

[0294] In a specific embodiment, when the cycloid rotor engine stops running, the wave spring sheet 101 returns to its natural wave-like structure, and the contact force between the brush wire 104 and the rotor is reduced to avoid excessive wear; the wave spring sheet 101 ensures that the contact between the brush wire 104 and the rotor can quickly form an effective seal when it is started next time through its elastic recovery force.

[0295] Embodiment 8 The anti-deformation capability provided by the wave spring sheet 101 enables the brush filament 104 to adapt to different working conditions

[0296] The brush-labyrinth seal is precisely fixed at the top of the cycloid rotor engine. This fixing method ensures the accurate position of the seal when the cycloid rotor engine is not running, laying the foundation for efficient sealing after startup. The structural design and fixing method of the seal ensure stability and will not be displaced or deformed due to external environment or vibration. (1) Under static working conditions (when the cycloid rotor engine is not running)

[0297] Under static conditions (when the cycloidal rotor engine is not running), the main purpose of the brush-labyrinth seal device is to ensure structural stability and initial sealing effect, laying the foundation for engine starting and normal operation.

[0298] Before starting the cycloid rotor engine, the brush-labyrinth seal is fixed at the top of the engine, which is usually one of the most critical areas for the sealing effect. Through precise installation, the accurate position of the seal in static conditions is ensured to ensure the sealing effect. Specifically, the wave spring sheet 101 is installed above the seal to provide basic preload and resistance to deformation. In static conditions, the brush 104 is kept in initial contact with the rotor to ensure that a sealing effect can be quickly formed when the cycloid rotor engine is started. Specifically, the brush 104 is installed between the front baffle 103 and the rear baffle 102 to contact the rotor surface. Under static conditions, the brush 104 needs to maintain initial contact with the rotor surface to form a preliminary seal.

[0299] The wave spring sheet 101 provides a basic preload force in static conditions. This preload force ensures that the brush filaments 104 maintain initial contact with the rotor surface. In static conditions, the main task of the wave spring sheet 101 is to provide sufficient force so that the brush filaments 104 can adapt to and cling to the rotor surface, and maintain a certain sealing effect even when the rotor is not rotating. In static conditions, the brush filaments 104 rely on the preload force of the wave spring sheet 101 to closely contact the rotor surface to form a preliminary physical barrier. Although this contact does not need to be completely sealed in static conditions. The flexible design of the brush filaments 104 enables it to cling to the rotor surface in static conditions, and quickly adapt to its movement when the rotor starts to rotate, forming a more effective seal.

[0300] (2) Starting conditions (when the cycloid rotor engine is started)

[0301] Under starting conditions, the engine starts running from a stationary state and the rotor gradually accelerates. At this time, the brush-labyrinth seal device needs to quickly form a sealing effect to prevent gas leakage.

[0302] When the cycloid rotor engine is started, the rotor gradually begins to rotate from a stationary state. As the rotor speed increases, the brush filaments 104 must quickly adapt to this change to maintain close contact with the rotor. In the early stage of the rotor's rotation, the brush filaments 104 are already in close contact with the rotor surface due to the preload of the wave spring sheet 101. This initial seal helps prevent gas from leaking from the high-pressure area to the low-pressure area during the startup process. Furthermore, when the brush filaments 104 are in contact with the rotor, the brush filaments 104 can effectively separate the air chambers of different pressures and prevent high-pressure gas from leaking into the low-pressure area; the brush filaments 104 have high flexibility and can adapt to the initial rotational motion of the rotor, maintain stable contact with the rotor surface, and ensure the sealing effect.

[0303] Furthermore, when the cycloid rotor engine starts, the wave spring sheet 101 begins to show its ability to resist deformation. Due to the preload of the wave spring sheet 101, the brush wire 104 can always be in close contact with the rotor surface when the rotor starts to rotate, preventing gas leakage. The elastic design of the wave spring sheet 101 enables it to adapt to the initial acceleration of the rotor and maintain the stability and sealing performance of the brush wire 104.

[0304] (3) Normal operating conditions (when the cycloid rotor engine rotates at high speed)

[0305] Under normal operating conditions, the engine enters a high-speed rotation state, and the sealing device needs to continue to maintain an efficient sealing effect to ensure that the gas in the high-pressure and low-pressure areas does not leak.

[0306] When the cycloid rotor engine rotates at high speed, the brush wire 104 always closely fits the rotor surface under the preload and deformation resistance provided by the wave spring sheet 101, ensuring the effective separation of the high-pressure area and the low-pressure area to prevent gas leakage. The brush wire 104 forms a continuous sealing barrier on the high-speed rotating rotor surface, effectively separating the high-pressure area and the low-pressure area to prevent gas leakage; the brush wire 104 has high flexibility and can adapt to the high-speed rotation and slight deformation of the rotor to maintain a stable sealing effect.

[0307] Furthermore, the staggered arrangement of the labyrinth grooves 105 and the brush wires 104 forms a complex gas flow path, which requires the gas to change direction multiple times when passing through the sealing device, forming vortices and gradually dissipating kinetic energy; when the gas passes through the labyrinth grooves 105 and the brush wires 104, due to the multiple changes in the path and the physical resistance of the brush wires 104, the kinetic energy is gradually dissipated, forming vortices and isobaric expansion, causing the air flow velocity to gradually decrease, and ultimately achieving a sealing effect.

[0308] Furthermore, under high-speed rotation conditions, the wave spring sheet 101 continues to provide pre-tightening force, so that the brush filaments 104 are close to the rotor surface to maintain sealing; the wave spring sheet 101 has good anti-deformation ability, and can maintain its shape and elasticity under high-frequency vibration and centrifugal force, ensuring that the brush filaments 104 can adapt to the high-speed movement of the rotor and prevent seal failure; the wave spring sheet 101 exhibits good anti-deformation ability under high-speed rotation and high-frequency vibration conditions, ensuring that the brush filaments 104 can adapt to the high-speed movement and slight deformation of the rotor and prevent seal failure.

[0309] (4) High temperature and high pressure conditions

[0310] Under high temperature and high pressure environment, the materials of brush wire 104 and wave spring sheet 101 must be able to maintain their elasticity and mechanical properties to ensure the sealing effect. Highly flexible brush wire 104 can adapt to the deformation of the rotor under high temperature and high pressure, maintain close contact with the rotor surface, and prevent gas leakage.

[0311] Furthermore, the rotor is prone to thermal expansion and contraction. Due to its high flexibility, the brush wire 104 can adapt to the changes of the rotor and always maintain the sealing effect; the brush wire 104 can effectively separate the high-pressure area and the low-pressure area, prevent gas leakage between the air chambers, and ensure the normal operation of the cycloid rotor engine. Specifically, the wave spring sheet 101 can continuously provide preload force in a high-temperature and high-pressure environment to ensure that the brush wire 104 is close to the rotor surface and maintains the sealing effect; the wave spring sheet 101 has good deformation resistance and can maintain its elasticity and mechanical properties in a high-temperature and high-pressure environment, ensuring the durability and reliability of the sealing device. Specifically, in a high-temperature and high-pressure environment, the labyrinth groove 105 further increases the complexity of the gas flow path, causing the gas to change direction multiple times when passing through the labyrinth groove 105 and the brush wire 104, and the kinetic energy is gradually dissipated, forming vortices and isobaric expansion, and finally achieving a sealing effect.

[0312] Test verification 1: Under static working conditions, the brush-labyrinth seal device is precisely fixed at the vertex inside the cycloid rotor engine to ensure accurate position and stable structure. The wave spring sheet 101 provides basic preload and deformation resistance, so that the brush wire 104 maintains initial contact with the rotor surface to form a preliminary sealing effect.

[0313] Test Verification 2: When the cycloid rotor engine is started, the rotor starts to rotate from a stationary state. Under the preload provided by the wave spring sheet 101, the brush wire 104 closely fits the rotor surface and quickly forms a preliminary sealing effect. The wave spring sheet 101 demonstrates its ability to resist deformation, ensuring that the brush wire 104 can adapt to the initial movement of the rotor and prevent gas leakage. The high flexibility design of the brush wire 104 enables it to dynamically adapt to the rotational movement of the rotor, separate the air chamber, and achieve an effective flexible sealing effect.

[0314] Test Verification 3: When the cycloidal rotor engine rotates at high speed, the brush wire 104, under the continuous preload and anti-deformation force provided by the wave spring sheet 101, fits tightly to the rotor surface, separates the high-pressure area and the low-pressure area, and maintains the seal. The gas passes through the complex path of the labyrinth groove 105 and the brush wire 104, and the kinetic energy is gradually dissipated, forming eddy currents and isobaric expansion, and finally achieving the sealing effect. The wave spring sheet 101 exhibits good anti-deformation ability under high-speed rotation conditions, allowing the brush wire 104 to adapt to the high-speed movement and slight deformation of the rotor, ensuring the continuity and reliability of the sealing effect.

[0315] Test Verification 4: Under high temperature and high pressure conditions, the brush-labyrinth seal device maintains an efficient sealing effect through the elasticity and mechanical properties of the brush wire 104 and the wave spring sheet 101. The highly flexible brush wire 104 can adapt to the thermal expansion and contraction of the rotor, always maintain close contact with the rotor surface, and prevent gas leakage. The wave spring sheet 101 provides continuous preload and anti-deformation ability under high temperature and high pressure environments to ensure the durability and reliability of the sealing device. Through the complex path design of the labyrinth groove 105 and the brush wire 104, the kinetic energy of the gas is gradually dissipated, and finally an efficient sealing effect is achieved.

[0316] Example 9 Specific example of the cross arrangement of brush filaments 104

[0317] In a specific embodiment, the brush wires 104 are arranged in a staggered manner for a brush wire 104 staggered sealing device of a cycloidal rotor engine. The brush wires 104 are arranged in a staggered manner, and the positions of the brush wires 104 in each row are staggered from the positions of the brush wires 104 in the adjacent row. The interval between each brush wire 104 does not exceed 0.007 mm, ensuring that the brush wires 104 are closely arranged and interconnected to prevent gas leakage.

[0318] The implementation steps of the staggered arrangement of the brush filaments 104 are as follows: First, fix the brush filaments 104 by fixing one end of each brush filament 104 on the front baffle 103 and the other end on the rear baffle 102. The fixing method can be high-performance welding, glue bonding or mechanical snap-on; ensure that the spacing between each brush filament 104 meets the design requirements, and ensure the tightness and staggered arrangement. Next, assemble the sealed cavity by tightly combining the front baffle 103 and the rear baffle 102 to form a sealed cavity. Use high-strength screws or rivets to fix the baffle to ensure the stability and sealing of the sealed cavity; add a sealing strip or sealing ring at the joint of the front baffle 103 and the rear baffle 102 to further improve the sealing performance and prevent dust and impurities from entering the cavity. Finally, install it to the rotor system and install the assembled brush wire 104 cross-row sealing device to the rotor system to ensure that the brush wire 104 is in effective contact with the rotor surface; by adjusting the installation position of the front and rear baffles, ensure that the brush wire 104 can generate appropriate pressure and coverage area when the rotor rotates.

[0319] (1) Low speed operation

[0320] In a specific embodiment, when the rotor is running at a low speed, the brush wire 104 has a small deflection amplitude due to the low rotation speed, but still maintains effective contact with the rotor surface to achieve a basic sealing effect. At low speed, the gas and lubricating oil in the sealed cavity will not leak easily, and external dust and debris are difficult to enter.

[0321] (2) Medium speed operation

[0322] In a specific embodiment, when the rotor runs at medium speed, the deflection amplitude of the brush 104 increases, the bending degree is significantly improved, and the contact area and contact pressure with the rotor surface are increased. At medium speed, the sealing effect of the brush 104 is further enhanced, effectively preventing the leakage of gas and lubricating oil, and preventing external dust and debris from entering the sealing cavity.

[0323] (3) High-speed operation

[0324] In a specific embodiment, when the rotor is running at high speed, the deflection of the brush 104 reaches the maximum, forming a higher contact pressure and a larger contact area, ensuring the sealing effect during high-speed operation. At high speed, the flexible design of the brush 104 ensures that it can flexibly adapt to the high-speed movement of the rotor and provide reliable sealing. At the same time, the airflow and debris inside and outside the system increase, and the brush 104 can still maintain the seal with the rotor surface to prevent external dust and debris from entering the sealing cavity.

[0325] Embodiment 10 Specific embodiment of brush filaments 104 arranged in sequence

[0326] In a specific embodiment, the brush filaments 104 are arranged in a straight line, and the brush filaments 104 in each row and column are aligned to form a regular grid structure. The interval between each brush filament 104 does not exceed 0.007 mm, ensuring that the brush filaments 104 are closely arranged and interconnected to prevent gas leakage.

[0327] The implementation steps of the brush filaments 104 are as follows: First, fix the brush filaments 104, fix one end of each brush filament 104 on the front baffle 103, and fix the other end on the rear baffle 102. The fixing method can be high-performance welding or mechanical clips. Ensure that the spacing between each brush filament 104 meets the design requirements to ensure the tightness and neatness of the arrangement. Next, assemble the sealed cavity and tightly combine the front baffle 103 and the rear baffle 102 to form a sealed cavity. Use high-strength screws or rivets to fix the baffle to ensure the stability and sealing of the sealed cavity. Add a sealing strip or sealing ring at the joint of the front baffle 103 and the rear baffle 102 to further improve the sealing performance and prevent dust and impurities from entering the cavity. Finally, install it to the rotor system. Install the assembled brush filament 104 sequential sealing device on the rotor system to ensure that the brush filaments 104 are in effective contact with the rotor surface. By adjusting the installation positions of the front baffle plate 103 and the rear baffle plate 102 , it is ensured that the brush wire 104 can generate appropriate pressure and coverage area when the rotor rotates.

[0328] (1) Low speed operation

[0329] In a specific embodiment, when the rotor is running at a low speed, the brush wire 104 has a small deflection amplitude due to the low rotation speed, but still maintains effective contact with the rotor surface to achieve a basic sealing effect. At low speed, the gas and lubricating oil in the sealed cavity will not leak easily, and external dust and debris are difficult to enter.

[0330] (2) Medium speed operation

[0331] In a specific embodiment, when the rotor runs at medium speed, the deflection amplitude of the brush 104 increases, the bending degree is significantly improved, and the contact area and contact pressure with the rotor surface are increased. At medium speed, the sealing effect of the brush 104 is further enhanced, effectively preventing the leakage of gas and lubricating oil, and preventing external dust and debris from entering the sealing cavity.

[0332] (3) High-speed operation

[0333] In a specific embodiment, when the rotor runs at high speed, the deflection of the brush 104 reaches the maximum, forming a higher contact pressure and a larger contact area, ensuring the sealing effect during high-speed operation. At high speed, the flexible design of the brush 104 ensures that it can flexibly adapt to the high-speed movement of the rotor and provide reliable sealing. At the same time, the airflow and debris inside and outside the system increase, and the brush 104104 can still maintain the seal with the rotor surface to prevent external dust and debris from entering the sealing cavity.

Claims

1. A radial brush-labyrinth seal device inside a cycloid rotor engine, the rotor engine comprising a rotor and a stator, the stator comprising three arc-shaped side walls, characterized in that: The sealing device is composed of a front baffle (103), a rear baffle (102), a brush wire (104) and a wave spring sheet (101); the rear baffle (102) and the front baffle (103) are both in an inverted L shape and are spliced ​​together to form a gantry-like structure; a portion of the brush wire (104) is located in an opening of the gantry-like structure; and the wave spring sheet (101) is located at the top of the gantry-like structure; the sealing device is radially fixed to the side wall of the stator through the wave spring sheet (101); The wave spring sheet (101) is used to provide a pushing force toward the rotor; the brush wire (104), the rotor, the front baffle plate (103), the rear baffle plate (102), and the wave spring sheet (101) cooperate with each other to form a dynamic sealed cavity; the brush wire (104) works in coordination with the rotational movement of the rotor under the fixed support of the front baffle plate (103) and the rear baffle plate (102), so as to prevent external dust or internal impurities from entering the sealed cavity.

2. According to claim 1, a radial brush-labyrinth seal device inside a cycloid rotor engine is characterized in that: The front baffle (103) and the rear baffle (102) are respectively located inside and outside the sealing device; the height of one side of the front baffle (103) of the gantry-shaped structure opening is lower than the height of one side of the rear baffle (102); the length of the brush filament (104) is greater than the height of one side of the rear baffle (102); the rear baffle (102) provides support and protection for the brush filament (104) to prevent the brush filament (104) from deforming under high pressure difference; the brush filament (104) on one side of the front baffle (103) can be tilted along the rotation direction of the rotor to reduce the deformation of the brush filament (104); the labyrinth groove (105) on the front baffle (103) forms a labyrinth effect to slow down the flow of gas; the front baffle (103) is at the front, and the brush filament 104 is guided by the labyrinth groove (105) of the front baffle (103) to tilt along the direction of movement; A plurality of labyrinth grooves (105) having a labyrinth-shaped structure are radially arranged in the depth direction of the inner side of the opening formed by the front baffle plate (103) and the rear baffle plate (102). The plurality of labyrinth grooves (105) force the gas flow path to become tortuous, forming a labyrinth effect. The labyrinth grooves (105) are symmetrically distributed on the left and right sides, so that the gas flow is subjected to uniform resistance when passing through the front baffle plate (103) and the rear baffle plate (102).

3. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 2, characterized in that: The wave spring sheet (101) is formed by combining a plurality of wave spring sheets (101) into a wave shape to form a plurality of raised portions, which are elastically deformed under the action of the force generated by the movement of the rotor, and are capable of absorbing and buffering external forces and generating continuous pushing force, thereby maintaining close contact between the brush filaments (104) and the inner wall of the cylinder body.

4. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 2, characterized in that: The brush filaments (104) are evenly distributed during the arrangement process, and the brush filaments (104) are arranged in bundles with equal spacing; The bundles are arranged in a staggered arrangement, a straight arrangement, or a straight arrangement in the middle and a staggered arrangement around the edges; The forked rows are arranged crosswise, the density of the brush wires (104) is high, and the gap is reduced; The sequential arrangement is in a straight line, ensuring that the intervals between each brush filament (104) are uniform and minimal.

5. The radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 2, characterized in that: The labyrinth groove shape of the labyrinth groove (105) is square, circular or trapezoidal; each groove of the square labyrinth groove (105) is rectangular or square, and its edge is a straight line; each groove of the circular labyrinth groove (105) is circular or elliptical, and its edge is an arc; each groove of the trapezoidal labyrinth groove (105) is a trapezoid.

6. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 2, characterized in that: The labyrinth grooves (105) are arranged in a ring or spiral shape on the rotor surface, so that the gas changes direction multiple times when passing through.

7. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 3, characterized in that: The number of the wave spring sheets (101) is 3-6, so as to maintain close contact between the brush filaments (104) and the rotor.

8. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 4, characterized in that: The brush filaments (104) are solid cylindrical, and the diameter of each brush filament (104) is between 0.01 mm and 0.1 mm.

9. A radial brush-labyrinth seal device inside a cycloid rotor engine according to claim 5, characterized in that: The spacing between the labyrinth grooves (105) on the same side is 0.3-0.8 mm, and the number of the labyrinth grooves (105) is 2-5.

10. The internal radial brush-labyrinth seal device of a cycloidal rotor engine according to claim 2, characterized in that: The brush filament (104) bundle is made of cobalt-based high-temperature alloy or carbon fiber.

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