Cylinder seat assembly with antifouling and pollution discharge capacity

Abstract

The invention discloses a cylinder block assembly with antifouling and pollution discharge capacity, and belongs to the field of airplane wheel brake systems. The air cylinder seat assembly comprises an air cylinder seat, the air cylinder seat is of a symmetrical structure with a symmetry axis, at least five or more than five odd vertexes are arranged on the air cylinder seat, and a set of piston assembly is installed at each vertex. The mounting hole of each piston assembly is communicated with an oil way of the cylinder block, an exhaust port is formed in the piston assembly mounting hole at the highest point of the cylinder block, sewage draining ports are formed in the two piston assembly mounting holes at the lowest point, an exhaust nozzle is mounted at the exhaust port for exhausting, and an exhaust nozzle is mounted at the sewage draining port for draining sewage. The drain outlet is located at the lowest point of the cylinder seat oil way to form an impurity deposition area. According to the air cylinder seat assembly, impurity pollutants in oil liquid in the air cylinder seat assembly are deposited, the pollutants are prevented from flowing back into a hydraulic pressure supply system, the pollutants are conveniently discharged, and the problem that an existing air cylinder seat assembly does not have the antifouling and pollution discharge capacity is solved.

Description

Technical Field

[0001] This invention relates to the field of aircraft wheel braking systems, and more specifically to a cylinder seat assembly with anti-fouling and anti-pollution capabilities. Background Technology

[0002] The aircraft wheel braking system primarily uses hydraulic oil for pressure supply, and the cylinder seat assembly is the main functional component that converts hydraulic oil pressure into braking thrust. The cylinder seat assembly used in aircraft wheels with hydraulic braking systems mainly consists of a cylinder seat, piston assembly, seals, inlet nozzle, and exhaust nozzle. During operation, the aircraft's hydraulic supply system generates hydraulic pressure, pushing the piston assembly in the cylinder seat assembly to extend and press against the brake discs. This causes the brake discs to come into contact with each other, generating friction and achieving braking. After the hydraulic supply system releases the hydraulic pressure, the piston assembly retracts, releasing the brake discs and disengaging the brakes. During the processes of applying and releasing pressure, the oil within the cylinder seat assembly also experiences relative flow, which can carry away residual impurities from various components within the cylinder seat assembly's oil passages. Furthermore, the extension and retraction of the piston assembly can generate wear materials, introducing new contaminants into the oil.

[0003] In recent years, numerous incidents have occurred where hydraulic oil in the cylinder head assembly has become contaminated with impurities. This contamination has led to a series of problems, including jamming of moving parts in the cylinder head and other functional components, accelerated wear of seals causing oil leaks, and blockage of oil passages resulting in unstable pressure supply. These issues have rendered brake wheels inoperable, affecting aircraft braking efficiency and even causing partial loss of function, thus compromising braking safety. Furthermore, impurities in the cylinder head assembly's hydraulic fluid can spread along the hydraulic lines to other components, and if not promptly drained and maintained, this contamination can exacerbate the damage caused by the contamination.

[0004] Meanwhile, aircraft wheels are located under the fuselage of the aircraft, not only at the end of the aircraft's hydraulic pressurization system but also as the lowest-positioned hydraulic functional component within it. This causes impurities and contaminants in the hydraulic system to gradually accumulate at the end over time, further exacerbating the accumulation of impurities and contaminants within the cylinder head assembly. In other words, aircraft wheels operating within the hydraulic pressurization system are inevitably exposed to a hydraulic oil contamination environment, and the oil supplied to the cylinder head assembly by the hydraulic pressurization system itself contains certain impurities.

[0005] Existing aircraft wheel cylinder mount assemblies only have one vent near the highest point for venting the hydraulic pressure supply system; the oil inlet is usually located in the lower middle part of the cylinder mount assembly for hydraulic oil to enter. The entire cylinder mount assembly lacks both drainage and anti-fouling functions. With increasing demands for reliability and maintainability of various aircraft components, higher requirements are being placed on the design, operational stability, and anti-fouling reliability of aircraft wheel cylinder mount assemblies.

[0006] Therefore, there is a need to provide a cylinder block assembly with anti-pollution and anti-pollution maintenance capabilities to solve the above problems. Summary of the Invention

[0007] The technical problem to be solved: To avoid the shortcomings of the prior art, the present invention provides a cylinder seat assembly with anti-fouling and sewage discharge capabilities. Through the structural design of the cylinder seat assembly, impurities and contaminants in the oil inside the cylinder seat assembly are deposited, preventing contaminants from flowing back into the hydraulic pressure supply system and facilitating the discharge of contaminants, thus solving the problem that the existing cylinder seat assemblies do not have anti-fouling and sewage discharge capabilities.

[0008] The technical solution of this invention is: a cylinder seat assembly with anti-fouling and sewage discharge capabilities, comprising: The cylinder block has a polygonal symmetrical structure with an axis of symmetry passing through a vertex of the polygon and an edge opposite to that vertex. The axis of symmetry is located along the centerline of the aircraft landing gear column, and the vertex it passes through is the highest point of the cylinder block. The edge of the cylinder block forms at least five or more odd-numbered vertices, with reinforcing ribs connecting adjacent vertices. Each reinforcing rib contains an oil passage, and the oil passages are connected to form the cylinder block oil circuit. A piston assembly mounting hole is located at the intersection of adjacent oil passages, and the piston assembly mounting hole connects to the cylinder block oil circuit. The reinforcing rib through which the axis of symmetry passes is a zigzag structure with a high middle and low ends. Its internal oil passage follows the shape of the zigzag reinforcing rib, with the middle being higher than the ends. An oil inlet is located in the middle of the zigzag reinforcing rib, which passes through the internal oil passage and is located on the axis of symmetry of the cylinder block. An exhaust port connecting to the cylinder block oil circuit is located at the highest point of the cylinder block, and a drain port connecting to the cylinder block oil circuit is located at the lowest point on both sides of the axis of symmetry at the bottom of the cylinder block. Piston assembly, with piston assembly mounting holes in the cylinder block, is used to push the brake disc for braking under hydraulic pressure; The oil inlet nozzle is installed at the oil inlet hole and is used to connect the hydraulic pressure supply system and the cylinder seat oil circuit. There are three exhaust nozzles: one is installed at the exhaust port for exhausting oil passages; the other two are installed at the drain ports to remove impurities deposited in the cylinder block oil passages.

[0009] A further technical solution of the present invention is as follows: the reinforcing rib through which the axis of symmetry passes is referred to as the first reinforcing rib, which includes a left half reinforcing rib and a right half reinforcing rib that are symmetrical about the axis of symmetry; the oil passage inside the first reinforcing rib is referred to as the first oil passage, which includes a left half oil passage and a right half oil passage that are symmetrical about the axis of symmetry and are connected to each other; a boss facing away from the highest point of the cylinder seat is provided in the middle of the first reinforcing rib, and an oil inlet hole is provided along the axis of symmetry on the boss. The oil inlet hole is connected to the first oil passage, and the intersection point of the two is higher than the lowest point of the left half oil passage and the right half oil passage.

[0010] A further technical solution of the present invention is: the diameter of the oil passages in each reinforcing rib is the same, and the intersection of the oil inlet hole and the first oil passage is at least three times the diameter of the oil passage at the lowest point of the left half oil passage and the right half oil passage.

[0011] A further technical solution of the present invention is as follows: the end of the left half of the oil passage away from the oil inlet and the intersection with the second oil passage is a piston assembly mounting hole at the bottom of the cylinder block; the second oil passage is an oil passage provided within the reinforcing rib adjacent to the left half of the reinforcing rib; the end of the right half of the oil passage away from the oil inlet and the intersection with the third oil passage is another piston assembly mounting hole at the bottom of the cylinder block; the third oil passage is an oil passage provided within the reinforcing rib adjacent to the right half of the reinforcing rib; the two piston assembly mounting holes at the bottom of the cylinder block are the lowest points in the cylinder block oil passage, and impurity deposition areas are formed at the two lowest points of the cylinder block oil passage; the two drain ports are respectively connected to the lowest points of the cylinder block oil passage.

[0012] A further technical solution of the present invention is: one drain outlet is set on the axis of the second oil passage, and the other drain outlet is set on the axis of the third oil passage.

[0013] A further technical solution of the present invention is that the lower end face of the boss is at least 5mm higher than the center of the drain ports on both sides of the bottom of the cylinder seat.

[0014] A further technical solution of the present invention is: the exhaust port is arranged along the axis of symmetry, and the exhaust port is connected to the piston assembly mounting hole at the highest point of the cylinder seat.

[0015] A further technical solution of the present invention is: the drain port of the cylinder seat is provided with an oil drain mark, and the exhaust port is provided with an exhaust mark.

[0016] A further technical solution of the present invention is that the cylinder seat is provided with a plurality of weight-reducing holes, which are used to reduce the weight of the cylinder seat.

[0017] A further technical solution of the present invention is that a sealing ring is installed in both the exhaust port and the drain port of the cylinder seat, and the sealing ring is used for sealing connection between the cylinder seat and the exhaust port.

[0018] The beneficial effects of this invention are as follows: This invention provides a cylinder seat assembly with anti-fouling and sewage discharge capabilities. By improving the cylinder seat structure, especially its internal oil passage, and by setting a drain port at the lowest point of the oil passage and an exhaust port at the highest point, and placing the oil inlet in the middle of the two drain ports, so that the oil inlet is higher than the drain port, the exhaust and sewage discharge of impurities in the oil are achieved. Furthermore, by adapting and installing a piston assembly that connects to the cylinder seat oil passage, a cylinder seat assembly with anti-fouling and sewage discharge capabilities is constructed. The cylinder seat assembly forms a sedimentation point for impurities at the drain port, which facilitates the discharge of contaminants in the oil. At the same time, the design of the internal oil passage of the cylinder seat with the oil inlet higher than the drain port prevents the deposited oil from rolling back into the working oil flow, thereby avoiding the backflow of contaminants into the hydraulic pressure supply system. It has the dual functions of anti-fouling and sewage discharge.

[0019] Compared with the prior art, the present invention has the following advantages: 1. The cylinder block has at least five or more odd-numbered vertices, with a piston assembly mounting hole at each vertex. This is to facilitate the mirror-symmetric structure of the cylinder block, using the landing gear column centerline as the axis of symmetry, so that the cylinder block can be installed in accordance with the aircraft landing gear installation. This results in a unique highest point and two symmetrical lowest points. The piston assembly mounting hole at the highest point is located at the highest point of the cylinder block's oil passage, and an exhaust port is provided here to connect to this piston assembly mounting hole, facilitating the venting of the hydraulic system. The two piston assembly mounting holes at the two lowest points are mirror-symmetric along the axis of symmetry. The positions of these two piston assembly mounting holes at the lowest points of the cylinder block's oil passage allow residual contaminants and residues in the oil passage to deposit and accumulate under gravity, and then be discharged through the drain port.

[0020] 2. The cylinder seat of the present invention has a symmetrical structure, so there is no need to distinguish between left and right parts. During installation, the position of the piston assembly mounting hole at the lowest position of the cylinder seat assembly on the left and right landing gears remains unchanged. Therefore, the left and right landing gears can use the same cylinder seat assembly, and there is no need to design additional cylinder seat assemblies with left and right structural features.

[0021] 3. The oil circuit design of the cylinder block effectively prevents contaminants and residues from entering the working oil circuit of the hydraulic power supply system. Specifically, the intersection of the oil inlet and the oil circuit inside the cylinder block should be at least three oil circuit diameters higher than the lowest point of the oil circuits on both sides, typically about 15mm. This height difference ensures that even if contaminants and residues deposited at the lowest point bounce or float in a vibration environment, they will not rise more than two oil circuit diameters along the inclined oil circuit, effectively preventing contaminants and residues from entering the connected hydraulic power supply system oil circuit, thus achieving the purpose of preventing contamination. The mounting plane of the oil inlet, i.e., the convex lower end face, should be at least 5mm higher than the two lowest drain ports, so that the interface position connecting to the hydraulic power supply system, i.e., the oil inlet, is not located at the lowest point of the cylinder block oil circuit, avoiding the accumulation and deposition of contaminants and residues at the oil inlet.

[0022] 4. The highest-positioned vent nozzle is located at the highest point on the axis of symmetry, facilitating the upward movement of residual gas in the oil circuit and concentrating it at the highest vent nozzle. This makes it easier to expel residual gas during venting, resulting in better venting efficiency. The two lowest-positioned vent nozzles are installed at the lowest point on the machine, allowing residual residue and other contaminants in the oil circuit to accumulate at these two vent nozzles. Loosening these two vent nozzles allows for easy removal of accumulated contaminants and residue, facilitating routine maintenance and venting. The two vent nozzles for discharging contaminants, residue, and waste oil are symmetrically placed on the cylinder block assembly, allowing for easy operation from both the left and right landing gears.

[0023] 5. The cylinder block oil circuit is a single-channel oil circuit, which can be achieved using traditional machining methods and has good machinability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional schematic diagram of the overall structure of the cylinder seat assembly in this invention; Figure 2 This is a schematic diagram of the cylinder seat structure and the overall layout of the cylinder seat oil circuit in this invention; Figure 3 This is a schematic diagram showing the height difference between the oil inlet and the drain outlet of the cylinder seat in this invention. Figure 4 This is a schematic diagram of the arrangement of the three exhaust nozzles in the cylinder block assembly of the present invention; Figure 5 This is a schematic diagram showing the markings for exhaust or oil discharge at the installation locations of each exhaust nozzle on the cylinder block of the present invention; Figure 6 This is a three-dimensional structural diagram of the cylinder seat in this invention.

[0026] In the diagram: 1. Cylinder seat, 11. Axis of symmetry, 12. Reinforcing rib, 121. Left half reinforcing rib, 122. Right half reinforcing rib, 13. Cylinder seat oil passage, 131. Left half oil passage, 132. Right half oil passage, 133. Second oil passage, 134. Third oil passage, 14. Piston assembly mounting hole, 15. Oil inlet, 16. Exhaust port, 17. Drain port, 18. Boss, 19. Weight reduction hole, 2. Piston assembly, 3. Oil inlet, 4. Exhaust port, 5. Sealing ring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] An embodiment of the cylinder seat assembly with anti-fouling and sewage discharge capabilities according to the present invention, such as... Figure 1 As shown, it includes a cylinder block 1, a piston assembly 2, an oil inlet 3, an exhaust port 4, and a sealing ring 5.

[0029] like Figure 2 As shown, the cylinder seat 1 serves as a mounting support for the piston assembly 2, and it is provided with a mounting port for mounting the piston assembly 2 and an oil passage connecting the piston assembly 2 and the aircraft hydraulic pressure supply system.

[0030] The cylinder block 1 has a polygonal symmetrical structure with an axis of symmetry 11 passing through a vertex of the polygon and an edge corresponding to that vertex. The polygonal structure of the cylinder block 1 forms at least five or more odd-numbered vertices, and a set of piston assemblies 2 is installed at each vertex. In this embodiment, ... Figure 2 Taking the five vertices shown as an example, the cylinder seat 1 has its axis of symmetry 11 set along the center line of the aircraft landing gear column, and the vertices it passes through are the highest points of the cylinder seat 1. Reinforcing ribs 12 connect adjacent vertices, and each reinforcing rib contains an oil passage. These oil passages connect sequentially to form the cylinder seat oil passage 13. Piston assembly mounting holes 14 are located at the intersection of adjacent oil passages, connecting to the cylinder seat oil passage 13. In the cylinder seat structure with five vertices, a total of five piston assembly mounting holes 14 are formed. There is one piston assembly mounting hole 14 at the highest point. The two ends of the reinforcing rib through which the axis of symmetry 11 passes are the two lowest piston assembly mounting holes 14 of the cylinder seat 1. The reinforcing rib through which the axis of symmetry 11 passes is the side corresponding to the highest point.

[0031] The piston assembly 2 has 5 sets, each installed in one of the 5 piston assembly mounting holes 14 on the cylinder seat 1. The piston assembly 2 is used to push the brake disc for braking under hydraulic pressure. In this embodiment, the piston assembly 2 adopts a conventional structure, which will not be described in detail here.

[0032] like Figure 3As shown, the reinforcing rib through which the axis of symmetry 11 passes is a zigzag structure with a high middle and low ends. Its internal oil channels follow the shape of the zigzag reinforcing rib, with the middle being higher than the ends. The reinforcing rib through which the axis of symmetry 11 passes is designated as the first reinforcing rib. The first reinforcing rib includes a left half reinforcing rib 121 and a right half reinforcing rib 122, symmetrical about the axis of symmetry 11, which converge at the axis of symmetry 11. The internal oil channels of the first reinforcing rib are designated as the first oil channels. The first oil channels include a left half oil channel 131 and a right half oil channel 132, symmetrical about the axis of symmetry 11 and connected. The left half oil channel 131 and the right half oil channel 132 converge at the middle axis of symmetry 11, with the convergence point higher than the ends.

[0033] The first reinforcing rib has a boss 18 in the middle facing away from the highest point of the cylinder block. The boss 18 has an oil inlet hole 15 along the axis of symmetry, which is connected to the first oil passage. That is, the oil inlet hole 15 intersects with the first oil passage at the highest point, so that the intersection point is higher than the lowest point of the left half of the oil passage 131 and the lowest point of the right half of the oil passage 132.

[0034] In this embodiment, the oil passages inside each reinforcing rib are straight oil passages, machined from the outside of the cylinder seat 1 inward along the reinforcing rib. The diameter of each oil passage is the same. The intersection of the oil inlet hole 15 and the first oil passage is at least 3 oil passage diameters higher than the lowest point of the left half oil passage 131 and the right half oil passage 132. In this embodiment, an oil passage with a diameter of 5mm is used. Therefore, the intersection of the oil inlet hole 15 and the first oil passage is at least 15mm higher than the lowest point of the left half oil passage 131 (i.e., at the axis of the outer end face of the left half oil passage 131). The structures on the left and right sides are symmetrical, that is, the intersection of the oil inlet hole 15 and the first oil passage is at least 15mm higher than the lowest point of the right half oil passage 132.

[0035] An oil inlet nozzle 3 is installed at the oil inlet hole 15 to connect the hydraulic pressure supply system and the cylinder seat oil circuit 13. The oil inlet nozzle 3 is inserted into the oil inlet hole 15 and is fixedly connected to the lower end face of the boss 18 by fasteners. In other embodiments, the oil inlet nozzle 3 can also be replaced by a shuttle-shaped valve, which is installed on the lower end face of the boss 18, and the outlet end of the shuttle-shaped valve is connected to the oil inlet hole 15.

[0036] The cylinder block 1 has an exhaust port 16 at its highest point, which connects to the cylinder block oil passage, and a drain port 17 at its lowest point on both sides of the axis of symmetry 11. The exhaust port 16 and the drain port 17 are threaded holes for threaded connection with the exhaust nozzle 4.

[0037] Specifically, such as Figure 4 , Figure 5As shown, there is one exhaust port 16, which is arranged along the axis of symmetry 11 and connects to the piston assembly mounting hole 14 at the highest point of the cylinder block 1. There are two drain ports 17, located at the two piston assembly mounting holes 14 at the bottom of the cylinder block 1, respectively. The two piston assembly mounting holes 14 at the bottom of the cylinder block 1 are symmetrical with respect to the axis of symmetry 11. The end of the left half oil passage 131 furthest from the oil inlet 15 intersects with the second oil passage 133 to form one piston assembly mounting hole 14 at the bottom of the cylinder block 1. The second oil passage 133 is an oil passage located within the reinforcing rib adjacent to the left side of the left half reinforcing rib 121. The end of the right half oil passage 132 furthest from the oil inlet 15 intersects with the third oil passage 134 to form another piston assembly mounting hole 14 at the bottom of the cylinder block 1. The third oil passage 134 is an oil passage located within the reinforcing rib adjacent to the right side of the right half reinforcing rib 122. The two piston assembly mounting holes 14 at the bottom of the cylinder block 1 are the lowest points in the cylinder block oil passage 13. Impurity deposition areas are formed at the two lowest points of the cylinder block oil passage 13. The two drain ports 17 are respectively connected to the lowest points of the cylinder block oil passage 13. One drain port 17 is located on the axis of the second oil passage 133, and the other drain port 17 is located on the axis of the third oil passage 134.

[0038] There are three exhaust nozzles 4. One is installed at the highest point of the cylinder block 1 (exhaust port 16), which is used for venting the hydraulic system. The other two exhaust nozzles 4 are installed at drain ports 17, which are used to remove excess contaminants, residues, and other impurities deposited in the cylinder block oil passage 13. The exhaust nozzles 4 have different functions and uses depending on their installation location. To facilitate understanding the functions of different exhaust nozzles 4, as follows... Figure 5 As shown, an oil drain mark is provided at the drain port 17 of the cylinder block 1, and an exhaust mark is provided at the exhaust port 16.

[0039] To prevent impurities from accumulating at the oil inlet 15, in this embodiment, the lower end face of the boss 18 is set at least 5mm higher than the center of the drain ports 17 on both sides of the bottom of the cylinder seat 1.

[0040] A sealing ring 5 is installed in both the exhaust port 16 and the drain port 17 of the cylinder seat 1. The sealing ring 5 is used for sealing connection between the cylinder seat 1 and the exhaust nozzle 4 to ensure the airtightness of the cylinder seat oil circuit.

[0041] The cylinder block 1 has a mounting hole at its center for mounting with the brake housing. Around the center mounting hole are multiple weight-reducing holes 19, which are used to reduce the weight of the cylinder block 1. Figure 6As shown, the weight reduction hole 19 is located near the center of the cylinder seat 1, and the hole is a through hole near the reinforcing rib 12 of the cylinder seat 1. The blind hole forms a flat plate structure at the bottom of the cylinder seat. The height difference between this flat plate structure and the surrounding rib structure can form an effective stiffness enhancement effect, fully exploiting the strength and stiffness characteristics of the structure. The hollow structure in between can also effectively reduce the weight of the product.

[0042] Specific working principle: During operation, hydraulic oil from the aircraft's hydraulic pressure supply system enters the cylinder block oil passage 13 from bottom to top through inlet 3, driving the piston assembly 2 to push the brake disc. When depressurized, the hydraulic oil flows back through inlet 3. Throughout the entire process of pressurizing and depressurizing, residue in the cylinder block oil passage 13 will accumulate at the two lowest points of the oil passage and be discharged through the vent nozzle 4 of drain port 17. This design prevents impurities from flowing back into the hydraulic pressure supply system and spreading to other components with the hydraulic oil passage, while also ensuring timely discharge of impurities. Draining through drain port 17 is integrated with routine mechanical maintenance. First, apply low pressure to the hydraulic pressure supply system, then loosen the two vent nozzles 4 marked for draining oil at the lowest positions to remove accumulated contaminants and residue. Once the discharged oil is clear and free of contaminants, tighten the vent nozzles 4 to stop draining.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cylinder seat assembly with anti-fouling and sewage discharge capabilities, characterized in that, include: The cylinder block has a polygonal symmetrical structure with an axis of symmetry passing through a vertex of the polygon and an edge opposite to that vertex. The axis of symmetry is located along the centerline of the aircraft landing gear column, and the vertex it passes through is the highest point of the cylinder block. The edge of the cylinder block forms at least five or more odd-numbered vertices, with reinforcing ribs connecting adjacent vertices. Each reinforcing rib contains an oil passage, and the oil passages are connected to form the cylinder block oil circuit. A piston assembly mounting hole is located at the intersection of adjacent oil passages, and the piston assembly mounting hole connects to the cylinder block oil circuit. The reinforcing rib through which the axis of symmetry passes is a zigzag structure with a high middle and low ends. Its internal oil passage follows the shape of the zigzag reinforcing rib, with the middle being higher than the ends. An oil inlet is located in the middle of the zigzag reinforcing rib, which passes through the internal oil passage and is located on the axis of symmetry of the cylinder block. An exhaust port connecting to the cylinder block oil circuit is located at the highest point of the cylinder block, and a drain port connecting to the cylinder block oil circuit is located at the lowest point on both sides of the axis of symmetry at the bottom of the cylinder block. Piston assembly, with piston assembly mounting holes in the cylinder block, is used to push the brake disc for braking under hydraulic pressure; The oil inlet nozzle is installed at the oil inlet hole and is used to connect the hydraulic pressure supply system and the cylinder seat oil circuit. And there are three exhaust nozzles, one of which is installed at the exhaust port for exhausting oil circuit; the other two are installed at the drain port to discharge impurities deposited in the cylinder block oil circuit.

2. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 1, characterized in that, The reinforcing rib through which the axis of symmetry passes is designated as the first reinforcing rib, which includes a left half reinforcing rib and a right half reinforcing rib that are symmetrical about the axis of symmetry. The oil passage inside the first reinforcing rib is designated as the first oil passage, which includes a left half oil passage and a right half oil passage that are symmetrical about the axis of symmetry and are connected to each other. The first reinforcing rib has a boss in the middle that faces away from the highest point of the cylinder block. The boss has an oil inlet hole along the axis of symmetry. The oil inlet hole is connected to the first oil passage. The intersection of the two is higher than the lowest point of the left half oil passage and the right half oil passage.

3. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 2, characterized in that, The diameter of the oil passages inside each reinforcing rib is the same, and the intersection of the oil inlet hole and the first oil passage is at least three oil passage diameters higher than the lowest point of the left half oil passage and the right half oil passage.

4. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 2, characterized in that, The end of the left half of the oil passage furthest from the oil inlet, where it intersects with the second oil passage, forms a piston assembly mounting hole at the very bottom of the cylinder block. The second oil passage is an oil passage located within the reinforcing rib adjacent to the left half of the reinforcing rib. The end of the right half of the oil passage furthest from the oil inlet, where it intersects with the third oil passage, forms another piston assembly mounting hole at the very bottom of the cylinder block. The third oil passage is an oil passage located within the reinforcing rib adjacent to the right half of the reinforcing rib. The two piston assembly mounting holes at the very bottom of the cylinder block are the lowest points in the cylinder block oil passage. Impurity deposition areas are formed at these two lowest points of the cylinder block oil passage. The two drain ports are connected to the lowest points of the cylinder block oil passage.

5. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 4, characterized in that, One drain outlet is located on the axis of the second oil passage, and the other drain outlet is located on the axis of the third oil passage.

6. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 2, characterized in that, The lower end face of the boss is at least 5mm higher than the center of the drain ports on both sides of the bottom of the cylinder seat.

7. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 1, characterized in that, The exhaust port is positioned along the axis of symmetry and is connected to the piston assembly mounting hole at the highest point of the cylinder block.

8. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 1, characterized in that, The cylinder block has an oil drain mark at the drain port and an exhaust mark at the exhaust port.

9. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 1, characterized in that, The cylinder seat has sealing rings installed in both the exhaust port and the drain port. The sealing rings are used for sealing the connection between the cylinder seat and the exhaust port.

10. The cylinder seat assembly with anti-fouling and sewage discharge capabilities according to claim 1, characterized in that, The cylinder seat is provided with multiple weight-reducing holes, which are used to reduce the weight of the cylinder seat.

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