Sealing and lubricating system of rotor engine

Abstract

The invention relates to the technical field of engines, provides a sealing and lubricating system of a rotor engine, and aims at solving the problems that a traditional rotor engine is poor in sealing performance, low in lubricating efficiency, serious in abrasion and the like. The system comprises a radial sealing system, an end face air sealing system and an end face oil sealing system, sliding friction is replaced with rolling friction, friction resistance and abrasion are reduced, meanwhile, a lubricating oil supply channel is optimized, and the lubricating effect is improved. The radial sealing system adopts a radial sealing roller and an elastic supporting structure, the end face sealing system achieves airtight isolation through an end face sealing roller, and the end face oil sealing system forms oil sealing isolation through an end face sealing rotating ring rotating at a high speed. The cylinder body adopts a double-layer structure, and a cooling liquid interlayer is arranged in the middle to enhance the heat dissipation effect; the cylinder body and the end sealing plate are assembled through the concave-convex matching connector and the sealing ring, and the airtight performance, the watertight performance and the structural strength between the cylinder body and the end sealing plate are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a sealing and lubrication system of a rotary engine. Background Art

[0002] Compared with traditional reciprocating piston engines, rotary engines have the advantages of simple structure, high thrust-to-weight ratio, light weight, small displacement and high power, and very high speed and power-to-volume ratio, and are gradually being promoted and applied.

[0003] Since the radial sealing strips and end sealing strips of the rotor are mostly sliding friction, they are severely worn under high-speed operation, resulting in reduced sealing performance. At the same time, the cylinder body and head plate (including the connecting plate) are worn and scratched to form ghost claws, which shortens the engine maintenance cycle and also affects the life of the engine. In addition, since the sealing strip and most of the space on the inner wall of the cylinder body are not in a vertical fit state, there is a certain angle, and theoretically there is also a jamming phenomenon, which has a great impact on the starting of the engine and may even cause it to suffocate. Most of the existing technologies for rotary engines directly spray lubricating oil into the cylinder body, which has a low effective lubrication utilization rate and causes oil burning, which greatly increases the oil consumption and also causes another problem of substandard emissions. One factor is that since the ignition point of lubricating oil is lower than that of fuel, the efficiency of fuel-fuel mixture combustion and explosion is low, reducing the overall power. Therefore, the lubrication system of the rotary engine needs to be improved; the rotary engine cylinder and the head plate (equivalent to the lateral cylinder head) are mostly flatly connected, which is prone to misalignment and affects the working state of the internal rotor. In mild cases, knocking and abnormal operation may occur, and in severe cases, the engine may be damaged. The rotary engine cylinder and the head plate are mostly sealed by flat gaskets. The effective sealing area is the smallest at the through bolt position, which is the weakest link. It is easy for the gasket to be pierced and cracked by the high-pressure gas in the cylinder, causing leakage, reducing output power and affecting the reliable operation of the engine. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a sealing and lubricating system for a rotary engine, which comprises at least one cylinder body and a rotor installed in the cylinder body, and head plates on both sides of the cylinder body, characterized in that the rotor is provided with a radial sealing system, an end face air sealing system, an end face oil sealing system and a sealing lubrication system;

[0005] The radial sealing system is arranged in the radial seal installation groove at the junction of the two rotor working surfaces, and includes:

[0006] Radial sealing roller, radial sealing bearing cage, drag reducing roller. The radial sealing roller is a rolling component, and the radial sealing bearing cage is an elastic support structure. The drag reducing roller is installed on the upper part and is tangent to the radial sealing roller. The elastic support force generated by the radial sealing bearing cage applies a thrust to the radial sealing roller through the drag reducing roller, causing the radial sealing roller to closely fit and roll along the inner wall of the cylinder block, and absorb its vibration energy, thereby completing the sealing and isolation of the rotor and the cylinder block in the radial airtight part between the working surfaces;

[0007] A number of radial oil guiding holes are provided on the radial seal installation groove, which are communicated with the rotor lubricating oil common channel to lubricate and cool the moving components of the radial sealing system.

[0008] In a preferred embodiment, the radial sealing roller is a cylindrical rolling component, and end spring cages and rolling seal balls are built into both ends.

[0009] In a preferred embodiment, the head plate is internally provided with an end face seal ball track groove. The inner part of the end face seal ball track groove is a spherical structure, which is used in cooperation with the rolling seal ball, and a track groove oil supply hole is provided in the groove;

[0010] The rolling seal ball maintains the contact pressure with the end face seal ball track groove provided on the head plate through elastic pre-expansion force, so that the end part of the radial sealing roller maintains sealing and lubrication during the rolling motion, and absorbs the axial vibration energy of the radial sealing roller.

[0011] In a preferred embodiment, an end face air sealing system is provided on the rotor end face, including an end face sealing roller, an end face sealing bearing cage, and an end drag reducing roller, where:

[0012] The end face sealing roller rolls in the end face airtight part installation groove, and end spring cages and end seal beads are provided at both ends;

[0013] The end face sealing bearing cage is an elastic support structure, and an end drag reducing roller is installed. The end drag reducing roller is tangent to the end face sealing roller. The elastic support force of the end face sealing bearing cage is transmitted to the end face sealing roller through the end drag reducing roller and is in close contact with the end face of the head plate, so as to realize the sealing and isolation of the end face airtight part between the working surfaces during the rotation of the rotor;

[0014] A number of end face oil guiding holes are provided in the end face airtight part installation groove, which are communicated with the rotor lubricating oil common channel to lubricate and cool the moving components of the end face air sealing system.

[0015] In a preferred embodiment, an end face oil seal system is provided on the rotor end face, including a rotor end face oil seal groove, an end face sealing rotating ring, and a ring bearing cage; the end face sealing rotating ring and the ring bearing cage are installed in the rotor end face oil seal groove;

[0016] The end face sealing rotating ring is provided with at least one upper groove on the end face sealing ring;

[0017] The ring bearing cage is an elastic closed-loop structure, provided with end face oil seal balls, and is matched with the end face sealing rotating ring in the rotor end face oil seal groove to realize high-speed rotation in a sealed state.

[0018] In a preferred embodiment, the bottom of the rotor end face oil seal groove is provided with a lower groove and an oil guide hole in the oil seal groove; the oil guide hole in the oil seal groove is communicated with the rotor lubricating oil common channel;

[0019] The end face sealing rotating ring is provided with a plurality of rotating ring oil guide holes in the upper groove of the end face sealing ring, which penetrate up and down, and is provided with a lower groove on the end face sealing ring at the lower part;

[0020] The ring bearing cage is a wavy elastic closed-loop structure, with end face oil seal balls arranged at intervals up and down. The end face oil seal balls are matched with the end face sealing rotating ring for limited rotation; the ring bearing cage forms a limited rotation structure through the cooperation of the end face oil seal balls and the lower groove of the end face sealing ring.

[0021] One way of lubricating oil is that the rotor lubricating oil common channel enters the end face oil seal system through the oil guide hole in the oil seal groove for lubrication; the other way is to supply lubricating oil to the upper groove of the sealing ring in the common area between the rotor and the stator through the end face oil supply hole on the head plate, and transfer it to the ring bearing cage through the rotating ring oil guide hole to complete the self-lubrication of the oil seal system; under the dual action of oil pressure and centrifugal force, it then enters the rotor lubricating oil common channel through the oil guide hole in the oil seal groove to supply oil to other lubrication systems.

[0022] In a preferred embodiment, the cylinder block includes: an inner cylinder shell and an outer cylinder shell, forming a double-layer structure, with a coolant interlayer in the middle;

[0023] The head plate includes a head plate outer shell and a head plate inner shell, and forms a double-layer structure, with a head plate coolant interlayer in the middle, and forms an interlocking and matching structure corresponding to the cylinder block structure position;

[0024] An adapter plate and an external watertight interface of the adapter plate are also provided between two or more cylinder blocks;

[0025] And the concave-convex fit between the cylinder block and the head plate or the adapter plate is designed with the convex type for the material with a large coefficient of thermal expansion and the concave type for the material with a small coefficient of thermal expansion; the interface of the cylinder blocks of the same material is designed with the convex type.

[0026] In a preferred embodiment, the inner side of the head plate is provided with a head plate end face; the head plate end face is provided with a head plate end face oil supply hole, and supplies oil to the rotor end face oil seal system through an oil pump;

[0027] An adapter plate is provided between multiple cylinders. Adapter plate surfaces are provided on both sides of the adapter plate. Adapter plate end face oil supply holes are provided on both sides of the adapter plate, and a lubricating oil pump is used to supply oil to the rotor end face oil seal system.

[0028] In a preferred embodiment, the cylinder is provided with an intake passage and an exhaust passage, which are respectively communicated with the intake chamber and the working chamber;

[0029] An injector is provided in the intake chamber; a spark plug is provided in the compression chamber;

[0030] External bolt interfaces are provided on the cylinder block, and it is connected to the head plate through a housing connection bolt group.

[0031] Working method of the sealing and lubrication system of the rotary engine: The head plate end face oil supply hole provided on the head plate or the adapter plate end face oil supply hole provided on the adapter plate is pressurized by a lubricating oil pump and sprayed into the groove in the end face seal ring tangent to the inner ring gear of the rotor and the stator gear, and then flows into the lower groove of the end face seal ring and the ring bearing cage through the oil guiding hole in the end face seal ring, and is transmitted to the moving end face oil seal ball, realizing self-lubrication of the end face oil seal system;

[0032] The lubricating oil passing through the end face seal rotating ring randomly enters the lower groove of the oil seal groove at the bottom of the rotor end face oil seal groove, and enters the rotor lubricating oil common passage through the oil guiding hole in the oil seal groove;

[0033] One way of the lubricating oil enters the end face airtight part installation groove and the end face seal bearing cage through the end face oil guiding hole, and is transmitted to the surface of the moving end face seal roller, thereby completing the lubrication and cooling of the moving parts of the end face airtight seal system;

[0034] Another way of the lubricating oil enters the radial seal part installation groove through the radial oil guiding hole, and is then transmitted to the surface of the moving drag reduction roller through the radial seal bearing cage, and is further transmitted to the radial seal roller by the drag reduction roller. Another way enters the end face seal ball track groove through the track groove lubricating oil supply hole to supply oil and lubricate the end rolling seal ball and the built-in spring cage, thereby completing the lubrication and cooling of the moving parts of the radial seal system.

[0035] The beneficial effects achieved by the present invention are:

[0036] In the present invention, the rotor radial sealing strip and the end face sealing strip are changed from sliding friction to rolling friction, the precise lubricating oil supply channel is improved, the oil supply of the sealing part lubrication system is more reasonable, not only the frictional resistance is reduced, but also the wear between the sealing parts and the cylinder block and the head plate is reduced, the common problems of burning oil and wasting oil in the current rotary engine are reduced, the ghost claw phenomenon of the friction surface between the cylinder block and the head plate / adapter plate is greatly reduced, the service life of the sealing system is improved, and since the lubricating oil channel is provided in the rotor body, the overall heat dissipation effect of the rotor is also improved. More importantly, the working stability and effective life of the rotary engine are greatly improved;

[0037] To avoid the fatal defect of misalignment between the engine block and the head plate or the connecting plate caused by the through connection of long bolts, a concave-convex mating airtight interface and watertight interface are provided at the airtight and watertight interface positions between the cylinder block and the head plate or the connecting plate. By setting an internal sealing ring, the sealing performance is improved. After this structure is assembled, not only is the position accurate without misalignment, but also the structural strength at the interface is mutually improved;

[0038] While changing the radial sealing system and the end face sealing system from the current sliding friction to rolling friction, elastic bearing cages are also provided for all moving parts. This not only keeps the sealing parts close to the inner wall of the cylinder block and the end face of the head plate or the connecting plate, but also absorbs part of the vibration energy generated during operation, enabling automatic compensation for normal wear, thus automatically compensating for the wear gap and the gap caused by local centrifugal force changes; Since dedicated lubricating oil supply channels are provided for all moving parts and a redundant multi-channel design is adopted, the operating parts, especially the radial sealing system and the end face sealing system, have been improved in terms of lubrication, heat dissipation and other technical indicators. Due to the tension of the lubricating oil film, the sealing performance is better, and the working stability and service life of the engine are also greatly improved; The interface between the cylinder block and the head plate / connecting plate adopts a concave-convex inlay structure, which not only improves the airtight and watertight sealing performance between the shells, but also enables the shells to be accurately positioned relative to each other, eliminates the misalignment caused by vibration, and at the same time strengthens the structural strength at the interface. Especially for a rotary engine with a wide cylinder structure, its pressure resistance will be significantly improved; This subversive comprehensive design has high application value in the fields of automobiles, ships, aircraft, etc. Description of the Drawings

[0039] Figure 1 Schematic diagram of the positions of the rotor radial sealing system and the end face sealing system;

[0040] Figure 2 General layout drawing of the connection between the installation base of the rotor sealing system and the lubricating oil path

[0041] Figure 3 Schematic diagram of the main components of the rotor radial sealing system and the end face sealing system;

[0042] Figure 4 Schematic assembly drawing of the main components of the rotary engine;

[0043] Figure 5 General layout drawing of the cylinder block structure;

[0044] Figure 6 General layout drawing of the head plate structure;

[0045] Figure 7 General layout drawing of the connecting plate structure;

[0046] Figure 8 It is a detailed drawing of the assembly structure of the cylinder block and the connecting plate.

[0047] Numbers in the figure:

[0048] 1. Rotor

[0049] 1-1. Rotor working surface; 1-2. Combustion chamber; 1-3. Radial sealing system; 1-3-1. Radial seal installation groove; 1-3-2. Radial seal roller; 1-3-3. Radial seal bearing cage; 1-3-4. Spring cage; 1-3-5. Rolling seal ball; 1-3-6. Drag reduction roller; 1-3-7. Radial oil guiding hole; 1-4. End face gas sealing system; 1-4-1. End face gas seal installation groove; 1-4-2. End face seal roller; 1-4-3. End face seal bearing cage; 1-4-4. End spring cage; 1-4-5. End seal top bead; 1-4-6. End drag reduction roller; 1-4-7. End face oil guiding hole; 1-5. End face oil seal system; 1-5-1. Rotor end face oil seal groove; 1-5-1-1. Lower groove of oil seal groove; 1-5-1-2. Oil guiding hole of oil seal groove; 1-5-1-3. Common rotor lubricating oil passage; 1-5-2. End face seal rotating ring; 1-5-2-1. Upper groove of end face seal ring; 1-5-2-2. Oil guiding hole of end face seal ring; 1-5-2-3. Lower groove of end face seal ring; 1-5-3. Ring bearing cage; 1-5-4. End face oil seal ball; 1-11. Stator; 1-12. Crankshaft

[0050] 2. Cylinder block

[0051] 2-1. Inner shell of cylinder block; 2-2. Outer shell of cylinder block; 2-3. Intake passage; 2-4. Exhaust passage; 2-5. Fuel injector; 2-6. Spark plug; 2-7. Coolant interlayer; 2-10. External connection bolt interface of cylinder block; 2-11. Airtight interface of external connection structure of cylinder block; 2-12. Cylinder block air seal ring; 2-13. Watertight interface of external connection of cylinder block; 2-14. Water seal ring of external connection structure of cylinder block; 2-16. Intake chamber; 2-17. Compression chamber; 2-18. Working chamber

[0052] 3. Head plate

[0053] 3-1. Outer shell of head plate; 3-2. End face of head plate; 3-3. Friction surface of head plate end face; 3-7. Stator installation bolt; 3-9. Airtight interface of external connection of head plate; 3-10. Watertight interface of external connection of head plate; 3-11. External connection bolt interface of head plate; 3-14. Oil supply hole of track groove; 3-15. Coolant interlayer of head plate; 3-17. Track groove of end face seal ball; 3-20. Oil supply hole of head plate end face

[0054] 4. Connecting plate

[0055] 4-1. Adapter housing; 4-2. Adapter inner housing; 4-3. Adapter friction surface; 4-6. External airtight interface of the adapter; 4-7. External watertight interface of the adapter; 4-8. External bolt interface of the adapter; 4-11. Coolant interlayer; 4-15. Oil supply hole at the end face of the adapter; 4-16. Trajectory groove for sealing balls at the end face of the adapter; 4-17. Oil supply hole in the groove at the end face of the adapter

[0056] 5. Housing connection bolt group Specific implementation mode

[0057] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention

[0058] Refer to Figure 1 - Figure 8 , the specific structure of a sealing and lubrication system for a rotary engine is as follows: It includes at least one cylinder block 2, a rotor 1 installed in the cylinder block 2, and end head plates 3 on both sides of the cylinder block 2. It is characterized in that the rotor 1 is provided with a radial sealing system 1-3, an end face airtight sealing system 1-4, an end face oil seal system 1-5, and a seal lubrication system

[0059] The radial sealing system 1-3 is arranged in the radial seal installation groove 1-3-1 at the junction of the two working surfaces 1-1 of the rotor, and includes

[0060] Radial sealing rollers 1-3-2, a radial seal bearing cage 1-3-3, and drag reduction rollers 1-3-6. The radial sealing rollers 1-3-2 are rolling components, and the radial seal bearing cage 1-3-3 is an elastic support structure. The drag reduction rollers 1-3-6 are installed on the upper part and are tangent to the radial sealing rollers 1-3-2. The elastic support force generated by the radial seal bearing cage 1-3-3 applies a thrust to the radial sealing rollers 1-3-2 through the drag reduction rollers 1-3-6, so that the radial sealing rollers 1-3-2 closely fit and roll on the inner wall of the cylinder block 2, and absorb its vibration energy, completing the sealing and isolation of the rotor 1 and the cylinder block 2 in the radial airtight part between the working surfaces

[0061] A number of radial oil guide holes 1-3-7 are provided on the radial seal installation groove 1-3-1, which are connected to the rotor lubricating oil common channel 1-5-1-3 to lubricate and cool the moving components of the radial sealing system 1-3

[0062] The radial sealing rollers 1-3-2 are cylindrical rolling components, and end spring cages 1-4-4 and rolling seal balls 1-3-5 are built into both ends

[0063] The head plate 3 is internally provided with an end face sealing ball track groove 3-17. The inner part of the end face sealing ball track groove 3-17 is a spherical surface structure, which is used in cooperation with the rolling sealing ball 1-3-5. A track groove oil supply hole 3-14 is arranged in the groove.

[0064] The rolling sealing ball 1-3-5 maintains the contact pressure with the end face sealing ball track groove 3-17 provided on the head plate 3 through elastic pre-expansion force, so that the end part of the radial sealing roller 1-3-2 maintains sealing and lubrication during the rolling motion, and absorbs the axial vibration energy of the radial sealing roller 1-3-2.

[0065] An end face gas sealing system 1-4 is arranged on the rotor end face, including an end face sealing roller 1-4-2, an end face sealing bearing cage 1-4-3, and an end part drag reducing roller 1-4-6, where:

[0066] The end face sealing roller 1-4-2 rolls in the end face airtight part installation groove 1-4-1, and end part spring cages 1-4-4 and end part sealing beads 1-4-5 are arranged at both ends;

[0067] The end face sealing bearing cage 1-4-3 is an elastic support structure, on which an end part drag reducing roller 1-4-6 is installed. The end part drag reducing roller 1-4-6 is tangent to the end face sealing roller 1-4-2. The elastic support force of the end face sealing bearing cage 1-4-3 is transmitted to the end face sealing roller 1-4-2 through the end part drag reducing roller 1-4-6, and is in close contact with the end face 3-2 of the head plate, so as to realize the sealing and isolation of the end face airtight part between each working surface during the rotation of the rotor 1;

[0068] A number of end face oil guide holes 1-4-7 are arranged in the end face airtight part installation groove 1-4-1, which are communicated with the rotor lubricating oil common channel 1-5-1-3 to provide lubrication and cooling for the moving parts of the end face gas sealing system 1-4.

[0069] An end face oil seal system 1-5 is arranged on the rotor end face, including a rotor end face oil seal groove 1-5-1, an end face sealing rotating ring 1-5-2, and a circular ring bearing cage 1-5-3; the end face sealing rotating ring 1-5-2 and the circular ring bearing cage 1-5-3 are installed in the rotor end face oil seal groove 1-5-1;

[0070] The end face sealing rotating ring 1-5-2 is provided with at least one end face sealing ring upper groove 1-5-2-1 on the upper part;

[0071] The circular ring bearing cage 1-5-3 is an elastic closed-loop structure, provided with end face oil seal balls 1-5-4, and is matched with the end face sealing rotating ring 1-5-2 in the rotor end face oil seal groove 1-5-1 to realize high-speed rotation in a sealed state.

[0072] The oil seal groove 1-5-1 on the rotor end face is provided with an oil seal groove lower groove 1-5-1-1 and an oil seal groove oil guiding hole 1-5-1-2 at the bottom; the oil seal groove oil guiding hole 1-5-1-2 communicates with the rotor lubricating oil common channel 1-5-1-3;

[0073] For the end face sealing rotating ring 1-5-2, a number of rotating ring oil guiding holes are arranged in the upper groove 1-5-2-1 of the end face sealing ring and penetrate up and down, and a lower groove 1-5-2-3 of the end face sealing ring is provided at the lower part;

[0074] The circular ring bearing cage 1-5-3 is a wavy elastic closed-loop structure, and end face oil seal balls 1-5-4 are arranged at intervals up and down. The end face oil seal balls 1-5-4 cooperate with the end face sealing rotating ring 1-5-2 for limited rotation; the circular ring bearing cage 1-5-3 forms a limited rotation structure through the cooperation of the end face oil seal balls 1-5-4 and the lower groove 1-5-2-3 of the end face sealing ring.

[0075] One way of the lubricating oil is that the rotor lubricating oil common channel 1-5-1-3 enters the end face oil seal system 1-5 through the oil seal groove oil guiding hole 1-5-1-2 for lubrication; the other way is that lubricating oil is supplied to the upper groove of the sealing ring in the common area of the rotor 1 and the stator 1-11 through the end face oil supply hole 3-20 of the head plate, and is transmitted to the circular ring bearing cage 1-5-3 through the rotating ring oil guiding hole to complete the self-lubrication of the oil seal system; under the dual action of oil pressure and centrifugal force, it then enters the rotor lubricating oil common channel 1-5-1-3 through the oil seal groove oil guiding hole 1-5-1-2 to supply oil to other lubrication systems.

[0076] The cylinder block 2 includes: an inner cylinder shell 2-1 and an outer cylinder shell 2-2, which form a double-layer structure, and a coolant interlayer 4-11 is in the middle;

[0077] The head plate 3 includes a head plate outer shell 3-1 and a head plate inner shell 3-2, and forms a double-layer structure. A head plate coolant interlayer 3-15 is in the middle, and it forms an interlocking and matching structure corresponding to the structure position of the cylinder block 2;

[0078] An adapter plate 4 and an external watertight interface 4-7 of the adapter plate are also provided between two or more cylinder blocks 2;

[0079] For the concave-convex fit between the cylinder block 2 and the head plate 3 or the adapter plate 4, the one with a large coefficient of thermal expansion of the material is designed as a convex type, and the one with a small coefficient of thermal expansion of the material is designed as a concave type; the cylinder block 2 of the same material is designed as a convex type interface.

[0080] The inner side of the head plate 3 is provided with a head plate end face 3-2; the head plate end face 3-2 is provided with a head plate end face oil supply hole 3-20, and lubricating oil is supplied to the rotor end face oil seal system 1-5 through an oil pump;

[0081] An adapter plate 4 is provided between multiple cylinder blocks 2. Adapter plate surfaces are provided on both sides of the adapter plate 4. Adapter plate end face oil supply holes 4-15 are provided on both sides of the adapter plate 4, and oil is supplied to the rotor end face oil seal system 1-5 through an oil pump.

[0082] The cylinder block 2 is provided with an intake passage 2-3 and an exhaust passage 2-4, which are respectively communicated with an intake chamber 2-16 and a working chamber 2-18;

[0083] An injector 2-5 is provided in the intake chamber 2-16; a spark plug 2-6 is provided in the compression chamber 2-17;

[0084] The cylinder block has an external connection bolt interface 2-10, and is connected to the head plate 3 through a housing connection bolt group 5.

[0085] The working method of the sealing and lubrication system of the rotary engine: The head plate end face oil supply hole 3-20 provided on the head plate 3 or the adapter plate end face oil supply hole 4-15 provided on the adapter plate 4 is pressurized and sprayed by an oil pump onto the groove 1-5-2-1 in the end face seal ring where the inner ring gear of the rotor 1 is tangent to the gear of the stator 1-11, and then flows into the lower groove 1-5-2-3 of the end face seal ring and the annular bearing cage 1-5-3 through the end face seal ring oil guide hole 1-5-2-2, and is transmitted to the moving end face oil seal ball 1-5-4, realizing the self-lubrication of the end face oil seal system 1-5;

[0086] The lubricating oil passing through the end face seal rotating ring 1-5-2 randomly enters the lower groove 1-5-1-1 at the bottom of the rotor end face oil seal groove 1-5-1, and enters the rotor lubricating oil common channel 1-5-1-3 through the oil seal groove oil guide hole 1-5-1-2;

[0087] One way of the lubricating oil enters the end face airtight part installation groove 1-4-1 and the end face seal bearing cage 1-4-3 through the end face oil guide hole 1-4-7, and is transmitted to the surface of the moving end face seal roller 1-4-2, thus completing the lubrication and cooling of the moving parts of the end face airtight system 1-4;

[0088] Another way of the lubricating oil enters the radial seal part installation groove 1-3-1 through the radial oil guide hole 1-3-7, and is then transmitted to the surface of the moving drag reduction roller 1-3-6 through the radial seal bearing cage 1-3-3, and is transmitted from the drag reduction roller 1-3-6 to the radial seal roller 1-3-2. Another way enters the end face seal ball track groove 3-17 through the track groove lubricating oil supply hole, and supplies oil for lubrication to the end rolling seal ball 1-3-5 and the built-in spring cage 1-3-4, thus completing the lubrication and cooling of the moving parts of the radial seal system 1-3.

[0089] The following is a detailed description of the composition and connection relationship of the specified reference numerals and structures:

[0090] The rotor 1, which is the main working component of the engine, is equivalent to the piston of a reciprocating piston engine.

[0091] The radial sealing system 1-3 includes a radial seal mounting groove 1-3-1, which is located at the junction of two adjacent working surfaces of the rotor 1 and is used to install the components of the radial sealing system 1-3.

[0092] The radial sealing roller 1-3-2 rolls within the radial seal bearing cage 1-3-3, reducing friction and forming a seal with the inner wall of the cylinder block 2.

[0093] The radial seal bearing cage 1-3-3 supports the stable operation of the radial sealing roller 1-3-2. It has an elastic structure and can absorb the vibration energy during operation.

[0094] The spring cage 1-3-4 and the rolling seal ball 1-3-5 are arranged at both ends of the radial sealing roller 1-3-2, forming a rolling friction structure, reducing the friction resistance, reducing wear, increasing the working life of the seal, absorbing vibration energy, and enhancing the sealing effect.

[0095] The drag-reducing roller 1-3-6 is tangent to the radial sealing roller 1-3-2, further reducing the friction resistance, delivering lubricating oil to the radial sealing roller 1-3-2, and transmitting pressure to the radial sealing roller 1-3-2 to ensure the sealing performance.

[0096] The radial oil guiding hole 1-3-7 is connected to the lubricating oil channel and provides lubricating oil for the radial sealing system 1-3.

[0097] The end face gas sealing system 1-4 includes an end face airtight part mounting groove 1-4-1, which is used to install the end face sealing roller 1-4-2 and provide a lubricating oil path.

[0098] The end face sealing roller 1-4-2 rolls within the end face airtight part mounting groove 1-4-1 to form an airtight isolation.

[0099] The end face seal bearing cage 1-4-3 supports the stable operation of the end face sealing roller 1-4-2. It has an elastic structure and absorbs the vibration energy of the end face sealing roller 1-4-2.

[0100] The end spring cage 1-4-4 and the end seal top bead 1-4-5 are arranged at both ends of the end face sealing roller 1-4-2 to enhance the sealing effect.

[0101] The end drag-reducing roller 1-4-6 is tangent to the end face sealing roller 1-4-2, reducing the friction resistance and delivering lubricating oil.

[0102] The end face oil guiding hole 1-4-7 is connected to the lubricating oil channel and provides lubricating oil for the end face gas sealing system 1-4.

[0103] End face oil seal system 1-5, including

[0104] Rotating shaft end face oil seal groove 1-5-1: Located on the rotating shaft end face, used for installing the end face seal ring 1-5-2.

[0105] Lower groove 1-5-1-1 of the oil seal groove: Limit the movement of the ball bearings.

[0106] Oil guiding hole 1-5-1-2 of the oil seal groove: Connected to the lubricating oil channel, providing lubricating oil for the end face oil seal system 1-5.

[0107] Rotating shaft lubricating oil common channel 1-5-1-3: Connects each lubricating oil channel to ensure uniform distribution of lubricating oil.

[0108] End face seal ring 1-5-2: Rotates at high speed with the rotating shaft 1, forming an oil seal isolation between the rotating shaft end face and the head plate 3 / connection plate 4.

[0109] Upper groove 1-5-2-1 of the end face seal ring: Serves as an airtight and oil seal isolation groove.

[0110] Oil guiding hole 1-5-2-2 of the end face seal ring: Realizes the transfer of lubricating oil.

[0111] Lower groove 1-5-2-3 of the end face seal ring: Cooperates with the circular ring bearing cage 1-5-3 to form a central limit rotational movement.

[0112] Circular ring bearing cage 1-5-3: Supports the stable operation of the end face seal ring 1-5-2, having an elastic wavy closed-loop structure.

[0113] End face oil seal ball 1-5-4: Reduces the frictional resistance for supporting the operation of the end face seal ring 1-5-2.

[0114] Cylinder block 2;

[0115] Inner cylinder block shell 2-1 and outer cylinder block shell 2-2: Constitutes the main structure of the cylinder block 2. The inner cylinder block shell 2-1 cooperates with the rotating shaft 1 to complete all strokes of the engine.

[0116] Intake passage 2-3: Introduces fresh air for mixing with fuel.

[0117] Exhaust passage 2-4: Discharges the exhaust gas after combustion.

[0118] Fuel injector 2-5: Sprays fuel into the combustion chamber 1-2.

[0119] Spark plug 2-6: Ignites the mixed gas.

[0120] Coolant sandwich 4-11: Accommodates coolant to cool the cylinder block 2.

[0121] The external connection bolt interface 2-10 of the cylinder block is connected to the head plate 3 through the housing connection bolt group 5, and can also be used for the overall assembly of the engine and the connection of other components.

[0122] The airtight interface 2-11 and the watertight interface 2-13 of the external connection structure of the cylinder block: Connect to the head plate 3 or the connecting plate 4 to ensure airtightness and watertightness.

[0123] The air sealing ring 2-12 and the water sealing ring of the cylinder block: Enhance the sealing performance of the connection.

[0124] The intake chamber 2-16, the compression chamber 2-17, and the working chamber 2-18: Complete the intake, compression, and working processes respectively.

[0125] Head plate 3;

[0126] The head plate housing 3-1 and the end face: Constitute the main structure of the head plate 3.

[0127] The friction surface 3-3 of the head plate end face: Contacts the seal of the rotor 1.

[0128] The mounting groove and mounting bolt holes for the stator 1-11: Used to mount the stator 1-11 gear.

[0129] The through-hole for the crankshaft 1-12: Allows the crankshaft 1-12 to pass through.

[0130] The external connection airtight interface 3-9 and the watertight interface of the head plate: Connect to the corresponding interfaces of the cylinder block 2 to ensure sealing performance.

[0131] The external connection bolt interface 3-11 of the head plate: Used for the overall assembly of the engine and the connection of other components.

[0132] The coolant sandwich 4-11: Holds the coolant and conducts heat exchange for circulating cooling.

[0133] The oil supply hole 3-20 on the head plate end face: Provides lubricating oil for the end face sealing system.

[0134] Connecting plate 4;

[0135] The connecting plate housing 4-1 and the end face: Constitute the main structure of the connecting plate 4.

[0136] The friction surface 4-3 of the connecting plate: Contacts the seal of the rotor 1.

[0137] The external connection airtight interface 4-6 and the external connection watertight interface 4-7 of the connecting plate: Connect to the corresponding interfaces of the cylinder block 2 to ensure sealing performance.

[0138] The external connection bolt interface 4-8 of the connecting plate: Used for the connection with the cylinder block 2 and the connection of other components.

[0139] The mounting bracket of the connecting plate 4: Used for the load-bearing and support of the cylinder block 2.

[0140] Cooling liquid interlayer 4-11: contains cooling liquid and performs circulating cooling.

[0141] Oil supply hole 4-15 on the end face of the connecting plate: provides lubricating oil for the rotor end face sealing system.

[0142] Casing connecting bolt group 5; mainly used for the assembly of the rotary engine.

[0143] The rolling seal structure includes a radial seal roller 1-3-2: installed in the radial seal installation groove 1-3-1 at the intersection of the rotor working surface 1-1, and realizes rolling contact with the inner wall of the cylinder body 2 through the spring retainer 1-3-4 and the rolling seal ball 1-3-5.

[0144] End face sealing roller 1-4-2: Located on the end face of the rotor, it rolls in the end face airtight component mounting groove 1-4-1, and forms a dynamic seal with the end face friction surface 3-3 of the head plate through the end sealing top bead 1-4-5.

[0145] Drag reduction roller 1-3-6 and end drag reduction roller: installed on radial seal bearing retainer 1-3-3 and end face seal bearing retainer 1-4-3, tangent to the main seal roller, apply thrust through the elastic support structure to ensure that the seal roller always fits the contact surface and absorbs vibration energy at the same time.

[0146] The rolling friction design significantly reduces the friction resistance of traditional sliding seals and reduces wear. The spring cage 1-3-4 and the elastic bearing cage provide adaptive pressure to compensate for the gap caused by thermal expansion or wear and maintain sealing performance.

[0147] The interface structure of the watertight and airtight interfaces is a concave-convex matching design:

[0148] The cylinder body external connection structure airtight interface 2-11 and the cylinder body external connection watertight interface 2-13: the convex interface and the concave interface are precisely matched, and the cylinder body air sealing ring 2-12 and the water sealing ring are built-in.

[0149] Thermal expansion compensation: The material with a larger thermal expansion coefficient is designed with a convex structure. The expansion during operation makes the convex interface more tightly embedded in the concave interface, thereby enhancing the sealing. For the same material, the convex structure of the cylinder body 2 is given priority, because the cylinder body 2 of the engine is the first to contact the heat source when it is working, and its temperature is higher than the head plate 3 or the connecting plate 4.

[0150] The concave-convex structure is combined with a sealing ring to prevent combustion gas from leaking from between the cylinder body 2 and the head plate 3. This annular sealing ring is not affected by the penetration of the connecting bolts and has independent sealing performance. It can also improve the compressive strength when arranged in the groove, and its service life is also long when arranged in a closed space.

[0151] Watertight Isolation: The coolant in the coolant sandwich 4-11 is in a closed-loop circulation state through the external watertight interface 2-13 of the cylinder block, the external watertight interface 3-10 of the end head plate, and the external watertight interface 4-7 of the connecting plate. The sealing ring prevents the coolant from seeping into the combustion chamber 1-2 or the external environment.

[0152] Linkage Lubrication System:

[0153] The design of the oil seal ring avoids the leakage of lubricating oil from the lubrication channel and prevents external pollutants from entering the sealed area.

[0154] Lubrication Oil Supply Path and Lubrication Process Oil Supply Path:

[0155] Initial Oil Supply: The lubricating oil pump injects lubricating oil through the oil supply hole 3-20 on the end face of the end head plate of the end head plate 3 or the oil supply hole 4-15 on the end face of the connecting plate of the connecting plate 4.

[0156] Enter the End Face Oil Seal System 1-5: The lubricating oil flows into the oil guide hole 1-5-2-2 of the end face seal ring of the end face seal rotating ring 1-5-2 and enters the bottom of the rotor end face oil seal groove 1-5-1.

[0157] Distributed to the Common Channel: The lubricating oil enters the rotor lubricating oil common channel 1-5-1-3 through the oil guide hole 1-5-1-2 of the oil seal groove.

[0158] Shunted to the Sealing System:

[0159] Radial Sealing System 1-3: Lubricate the radial sealing roller 1-3-2 and the drag reduction roller 1-3-6 through the oil guide hole.

[0160] End Face Gas Sealing System 1-4: Lubricate the end face sealing roller 1-4-2 and the end drag reduction roller 1-4-6 through the oil guide hole.

[0161] The lubricating oil forms an oil film on the rolling seal contact surface, reducing the friction coefficient and dissipating heat. The oil film tension enhances the sealing effect and reduces gas leakage. The redundant oil guide hole design ensures that the lubricant evenly covers all moving parts and avoids local dry friction.

[0162] Sealing and Lubrication Linkage:

[0163] The drag reduction roller 1-3-6 of the rolling seal relies on the lubricating oil to reduce friction, and the design of the lubrication path ensures that the oil accurately covers the seal contact surface.

[0164] The rotational movement of the end face oil seal rotating ring isolates the combustion chamber 1-2 from the external environment through the oil film and lubricates the balls of the bearing cage at the same time.

[0165] Watertight / Airtight and Structural Strength Linkage:

[0166] The concave-convex interface not only achieves sealing but also enhances the connection strength between the cylinder block 2 and the head plate 3 through mechanical interlocking, preventing misalignment caused by vibration.

[0167] The circulating coolant in the coolant sandwich 4-11 dissipates heat through the water-tight interface cylinder block external water-tight interface 2-13 and the adapter plate external water-tight interface 4-7, preventing the seal from failing due to high temperature.

[0168] The elastic bearing cage automatically adjusts the position of the sealing rollers during thermal expansion or wear, maintaining the contact pressure. Lubricating oil dynamically compensates for the gap generated by seal wear through a common channel.

[0169] The rolling seals of the rotary engine are mainly embodied in the radial seal system 1-3 and the end face seal system.

[0170] Radial seal system 1-3: Installed in the radial seal member mounting groove 1-3-1 at the junction of two adjacent working surfaces of the rotor 1, it consists of radial seal rollers 1-3-2 and a radial seal bearing cage 1-3-3. The radial seal rollers 1-3-2 roll within the bearing cage, reducing friction.

[0171] End face seal system: Composed of an end face gas seal system 1-4 and an end face oil seal system 1-5. The end face gas seal system 1-4 adopts a rolling friction seal structure, consisting of end face seal rollers 1-4-2 and an end face seal bearing cage 1-4-3; the end face oil seal system 1-5 achieves oil seal isolation through an end face oil seal rotating ring that can rotate at high speed.

[0172] Sealing process: During engine operation, the radial seal rollers 1-3-2 and the end face seal rollers 1-4-2 roll within their respective bearing cages, maintaining close contact with the cylinder block 2 and the head plate 3 to form an effective seal, preventing high-pressure gas leakage. At the same time, rolling friction greatly reduces the wear and frictional resistance of traditional sliding seals.

[0173] Water-tight and air-tight: Water-tight and air-tight interfaces: Special water-tight and air-tight interfaces are provided at the joints of the cylinder block 2, the head plate 3, and the adapter plate 4, such as the cylinder block external water-tight interface 2-13 and the air-tight interface of the cylinder block 2, as well as the corresponding water-tight and air-tight interfaces of the head plate 3 and the adapter plate 4.

[0174] Special sealing rings are equipped at these interfaces to ensure water-tightness and air-tightness at the joints.

[0175] Sealing process:

[0176] When all components are tightened by bolt connection, the sealing ring is compressed at the interface, forming an effective water-tight and air-tight barrier. This design not only improves the sealing performance but also effectively prevents misalignment problems caused by component vibration.

[0177] Lubricating oil supply path and lubricating oil supply path of the lubricating process:

[0178] Oil supply starting point: The lubricating oil is pumped from the external oil tank into the engine through the lubricating oil pump.

[0179] End face oil supply hole: The lubricating oil first enters the engine through the end face oil supply holes on the head plate 3 or the connecting plate 4.

[0180] Lubrication of the oil seal system: The lubricating oil first enters the end face oil seal system 1-5 to lubricate the end face oil seal rotating ring and the oil seal bearing cage, and at the same time forms an oil film isolation to prevent gas leakage.

[0181] Common lubricating oil passage: The lubricating oil after being lubricated by the oil seal system flows into the rotor lubricating oil common passage 1-5-1-3 through the oil guide hole 1-5-1-2 of the oil seal groove.

[0182] Lubrication of the radial and end face gas seal systems 1-4: The lubricating oil in the common lubricating oil passage then flows into the radial seal system 1-3 and the end face gas seal system 1-4 through the oil guide holes respectively to lubricate the rolling seals of these systems.

[0183] During the operation of the engine, the lubricating oil continuously circulates to continuously lubricate all components that need to be lubricated. The rolling seals operate with low friction under the lubrication of the lubricating oil. At the same time, the lubricating oil can also carry away the heat generated by friction, playing a cooling role. In addition, the formation of the lubricating oil film enhances the sealing performance and further prevents gas leakage. The rolling seals, watertight, airtight, and lubricating systems of the rotary engine are an integrated whole that works closely together. The rolling seals reduce friction and wear and improve the sealing performance; the watertight and airtight designs ensure the stable operation of the engine under various working conditions; and the optimized lubricating system ensures the long-term reliable operation of all components. The comprehensive application of these technologies makes the rotary engine perform excellently in terms of power, efficiency, and lifespan.

[0184] The assembly method of the present invention is as follows:

[0185] ① Installation and positioning of the first head plate 3: Place the head plate 3 with the wear-resistant plate of the head plate 3 installed first onto the corresponding positioning taper pins on the fixed platform bracket according to the structural positioning requirements, lay it flat on the fixed platform bracket and level it. Place the crankshaft 1-12 bearing into the crankshaft 1-12 bearing sleeve, place the stator 1-11 gear into the stator 1-11 installation groove, and use the stator installation bolt 3-7 holes;

[0186] ②Assembly of the first cylinder block 2: Insert the cylinder block air sealing ring 2-12 and the external connection structure water sealing ring 2-14 of the cylinder block into the airtight interface 2-11 of the external connection structure on both sides of the first cylinder block 2 and the external connection water-tight interface 2-13 of the external connection of the cylinder block 2 respectively. Then, put the first cylinder block 2 onto the positioning taper pins at the corresponding positions on the fixed platform bracket. At the same time, align the airtight interface 2-11 of the external connection structure of the first cylinder block 2 and the external connection water-tight interface 2-13 of the external connection of the cylinder block 2 with the external connection airtight interface 3-9 of the head plate and the external connection head plate external connection water-tight interface 3-10 of the head plate 3 respectively, and then insert them into each other;

[0187] ③Assembly of the rotor 1: Assemble the inner ring gear of the rotor 1, the oil seal system of the rotor 1, the end face airtight system of the rotor, and the radial seal system 1-3 of the rotor 1 in sequence according to the design principle, and pre-check the lubricating oil channel;

[0188] Then, put the assembled rotor 1 into the first cylinder block 2, and make the inner ring gear of the rotor 1 engage with the gear of the stator 1-11;

[0189] ④Assembly of the crankshaft 1-12: Pass the crankshaft 1-12 through the rotor 1, the stator 1-11 and the first head plate 3 respectively, so that the eccentric shaft fits well with the bushing of the rotor 1, and ensure that the crankshaft 1-12 and the rotor 1 can rotate synchronously;

[0190] ⑤Assembly of the connecting plate 4: Put the center of the connecting plate 4 assembled with the bushing bearing and the wear-resistant plate onto the crankshaft 1-12 and lower it to the first cylinder block 2, so that it is docked with the external connection airtight interface and the external connection water-tight interface corresponding to the installed sealing ring;

[0191] ⑥Assembly of the second cylinder block 2: Install the second cylinder block 2 and the second rotor in the above sequence;

[0192] ⑦Installation and positioning of the second head plate 3: Perform the reverse operation of ①;

[0193] ⑧Assembly of peripheral components: Install the spark plug 2-6, the fuel injector 2-5, the intake and exhaust pipes, the fuel pump, the oil pump, the cooling pump, the external connection drive system, the starting motor, etc.;

[0194] ⑨Installation and commissioning: Install it on the suspension bracket of the application equipment according to the usage, connect the fuel tank, the lubricating oil tank, the ignition controller, the external power supply, the temperature control sensor, the air filter at the air intake, the clutch, the external equipment such as the load shaft coupling, etc., and connect the overall rotor engine into one body through the long and short bolt groups respectively, and tighten the torque of the bolt groups according to the design requirements.

[0195] ⑩Pre-start inspection: Perform the attitude inspection, mechanical fit inspection, oil circuit and circuit detection, smooth idling inspection, water-tight and air-tight inspection, etc. respectively, so that it has all the reliable conditions for starting and running.

[0196] The detailed working process of the rotary engine sealing and lubrication system is as follows:

[0197] I. Sealing and lubrication of the radial sealing system 1-3;

[0198] The core components include radial sealing rollers 1-3-2, drag reduction rollers 1-3-6, and rolling sealing balls 1-3-5;

[0199] Sealing process: The radial sealing roller 1-3-2 forms a rolling contact with the inner wall of the cylinder block 2 through the supporting force of the elastic cage and transmits pressure through the drag reduction roller 1-3-6. Both ends of the roller are matched with the track grooves of the end head plate 3 through the rolling sealing balls 1-3-5 to absorb axial vibration. Chamber isolation: The roller rolls along the inner wall of the cylinder block 2 to separate the combustion chamber 1-2 from the adjacent compression chamber 2-17 and prevent gas leakage.

[0200] Lubrication process: Main lubrication path: Lubricating oil enters the installation groove from the common channel through the radial oil guide hole 1-3-7 to lubricate the contact surfaces of the roller and the drag reduction roller 1-3-6. End lubrication: The oil supply hole 3-14 in the track groove injects oil into the track groove to lubricate the rolling sealing balls 1-3-5 and the spring cage 1-3-4.

[0201] II. Dynamic sealing of the end face gas sealing system 1-4;

[0202] The core components include end face sealing rollers 1-4-2, end drag reduction rollers 1-4-6, and end sealing beads 1-4-5;

[0203] Sealing process: The elastic cage applies pressure to the sealing roller through the end drag reduction roller 1-4-6 to make it closely adhere to the end face of the end head plate 3-2. End face isolation: The sealing roller rolls along the end face of the end head plate 3-2 to separate different working chambers.

[0204] Lubrication process: Lubricating oil injection: The common channel supplies oil to the installation groove through the end face oil guide hole 1-4-7 to form an oil film between the roller and the end face. End lubrication: The lubricating oil penetrates to the end sealing beads 1-4-5 to reduce axial friction.

[0205] III. Oil film isolation of the end face oil seal system 1-5;

[0206] The core components include end face sealing rotating rings 1-5-2, ring bearing cages 1-5-3, and oil seal groove oil guide holes 1-5-1-2;

[0207] Oil sealing process: Dynamic oil film formation: The sealing rotating ring rotates at a high speed with the rotor 1, and the centrifugal force causes the lubricating oil to form an oil film between the rotating ring and the end head plate 3 to isolate the gas from the external environment. Ball support: The ring bearing cage 1-5-3 supports the rotating ring through the end face oil seal balls 1-5-4, and the balls roll in the lower groove to reduce the frictional resistance.

[0208] Lubrication path: Direct oil supply: The lubricating oil pump sprays lubricating oil onto the groove on the rotating ring through the oil supply hole on the end head plate 3. Circulating lubrication: The lubricating oil flows into the lower groove through the oil guiding hole on the rotating ring. After lubricating the balls, it returns to the common channel through the oil guiding hole 1-5-1-2 of the oil seal groove.

[0209] IV. Composite seal between the cylinder block 2 and the end head plate 3;

[0210] The core components include the airtight interface 2-11 of the external connection structure of the cylinder block, the airtight external connection interface 3-9 of the end head plate, and the cylinder block air seal ring 2-12;

[0211] Airtight process: Concave-convex engagement: The convex part of the airtight interface of the cylinder block 2 is embedded in the concave notch of the end head plate 3, and the built-in sealing ring is compressed and deformed to form a multi-stage gas seal. Thermal expansion compensation: The thermal expansion coefficient of the material of the cylinder block 2 is greater than that of the end head plate 3. At high temperatures, the convex part expands and further compresses the sealing ring.

[0212] Watertight process: Coolant circulation: The coolant flows between the sandwich layers of the cylinder block 2 and the end head plate 3, and leakage is prevented through the watertight interface and the sealing ring. Structural reinforcement: The concave-convex interface design enables the cylinder block 2 and the end head plate 3 to form a mechanical interlock, avoiding vibration misalignment.

[0213] V. Global coordination process of the lubrication system;

[0214] Key path: Oil supply hole on the end head plate 3 → Groove on the rotating ring → Common channel → Each sealing system

[0215] Startup stage: The lubricating oil pump sprays lubricating oil onto the rotating ring through the oil supply hole, and the lubricating oil enters the common channel through the oil guiding hole.

[0216] Operation stage: Radial seal lubrication: Common channel → Radial oil guiding hole 1-3-7 → Drag reduction roller 1-3-6 → Roller. End face gas seal lubrication: Common channel → End face oil guiding hole 1-4-7 → End drag reduction roller 1-4-6 → Roller. Circulating recovery: The excess lubricating oil in each system returns to the lubricating oil sump through the oil guiding hole 1-5-1-2 of the oil seal groove. The coolant sandwich layer 4-11 circulates through the watertight interface of the cylinder block 2 to cool the temperature of the cylinder block 2.

[0217] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sealing and lubricating system for a rotary engine, which comprises at least one cylinder block, a rotor installed in the cylinder block, and end head plates on both sides of the cylinder block, and is characterized in that, The rotor is provided with a radial sealing system, an end face gas sealing system, an end face oil sealing system and a seal lubrication system; The radial sealing system is arranged in the radial seal installation groove at the junction of the working surfaces of the two rotors and includes: Radial sealing rollers, a radial sealing bearing cage, and drag reduction rollers. The radial sealing rollers are rolling components, and the radial sealing bearing cage is an elastic support structure. The drag reduction rollers are installed on the upper part and are tangent to the radial sealing rollers. The elastic support force generated by the radial sealing bearing cage applies a thrust to the radial sealing rollers through the drag reduction rollers, so that the radial sealing rollers are in close contact with the inner wall of the cylinder and roll, and absorb their vibration energy, completing the sealing and isolation of the rotor and the cylinder in the radial airtight part between the working surfaces; A number of radial oil guide holes are provided on the radial seal installation groove, which are connected to the common rotor lubricating oil channel to lubricate and cool the moving parts of the radial sealing system.

2. The sealing and lubricating system of the rotary engine according to claim 1, characterized in that, The radial sealing roller is a cylindrical rolling component, and end spring cages and rolling seal balls are built into both ends.

3. The sealing and lubrication system of a rotary engine according to claim 2, wherein The head plate is internally provided with an end face seal ball track groove. The inner part of the end face seal ball track groove is a spherical structure, which is used in cooperation with the rolling seal ball. A track groove oil supply hole is provided in the groove; the rolling seal ball maintains the contact pressure with the end face seal ball track groove provided on the head plate through elastic pre-expansion force, so that the end of the radial sealing roller maintains sealing and lubrication during rolling movement and absorbs the axial vibration energy of the radial sealing roller.

4. The sealing and lubricating system of the rotary engine according to claim 1, characterized in that, An end face gas sealing system is provided on the rotor end face, including end face sealing rollers, an end face sealing bearing cage, and end drag reduction rollers, wherein: The end face sealing rollers roll in the end face airtight part installation groove, and end spring cages and end seal beads are provided at both ends; the end face sealing bearing cage is an elastic support structure, and end drag reduction rollers are installed. The end drag reduction rollers are tangent to the end face sealing rollers. The elastic support force of the end face sealing bearing cage is transmitted to the end face sealing rollers through the end drag reduction rollers and is in close contact with the end face of the head plate, so as to realize the sealing and isolation of the end face airtight part between the working surfaces during the rotation of the rotor; a number of end face oil guide holes are provided in the end face airtight part installation groove, which are connected to the common rotor lubricating oil channel to lubricate and cool the moving parts of the end face gas sealing system.

5. The sealing and lubrication system of the rotary engine according to claim 1, characterized in that, An end face oil sealing system is provided on the rotor end face, including a rotor end face oil seal groove, an end face sealing rotating ring, and a ring bearing cage; the end face sealing rotating ring and the ring bearing cage are installed in the rotor end face oil seal groove; The end face sealing rotating ring is provided with at least one upper end face seal ring groove; The ring bearing cage is an elastic closed-loop structure, provided with end face oil seal balls, and rotates at a high speed in a sealed state in the rotor end face oil seal groove in cooperation with the end face sealing rotating ring.

6. The end face oil sealing system according to claim 5, wherein The bottom of the rotor end face oil seal groove is provided with a lower oil seal groove and an oil seal groove oil guide hole; the oil seal groove oil guide hole is connected to the common rotor lubricating oil channel; The end face sealing rotating ring is provided with a number of rotating ring oil guiding holes in the groove of the end face sealing ring, which penetrate up and down, and a lower groove of the end face sealing ring is provided at the lower part; The circular ring bearing cage is a wavy elastic closed-loop structure, and end face oil seal balls are arranged at intervals up and down. The end face oil seal balls cooperate with the end face sealing rotating ring to limit rotation; the circular ring bearing cage forms a limit rotation structure by cooperating with the lower groove of the end face sealing ring through the end face oil seal balls; One way of the lubricating oil is that the common rotor lubricating oil passage enters the end face oil seal system through the oil guiding hole of the oil seal groove for lubrication; the other way is to supply lubricating oil to the upper groove of the sealing ring in the common area of the rotor and the stator through the oil supply hole on the end face of the head plate, and transfer it to the circular ring bearing cage through the rotating ring oil guiding hole to complete the self-lubrication of the oil seal system; under the dual action of oil pressure and centrifugal force, it then enters the common rotor lubricating oil passage through the oil guiding hole of the oil seal groove to supply oil to other lubricating systems.

7. The sealing and lubrication system of the rotary engine according to claim 1, characterized in that, The cylinder block includes: an inner cylinder block shell and an outer cylinder block shell, forming a double-layer structure, with a coolant sandwich layer in the middle; The head plate includes a head plate outer shell and a head plate inner shell, and forms a double-layer structure, with a head plate coolant sandwich layer in the middle, and forms an interlocking and mating structure corresponding to the cylinder block structure position; A connecting plate is also provided between two or more cylinder blocks, and the structural forms on both sides of the connecting plate are similar to the inner side of the head plate; At the airtight interface position of the cylinder block and the head plate, a convex-concave mating cylinder block external connection structure airtight interface and a cylinder block airtight seal ring are provided; At the watertight interface position of the cylinder block and the head plate, a convex-concave mating cylinder block external connection structure watertight interface and a cylinder block external connection structure water seal ring are provided; Similarly, at the airtight and watertight interface positions of the head plate and the cylinder block, corresponding convex-concave mating head plate external connection airtight interface and head plate external connection watertight interface are provided; At the airtight and watertight interface positions of the connecting plate and the cylinder block, corresponding convex-concave mating connecting plate external connection airtight interface and connecting plate external connection watertight interface are provided; Moreover, for the convex-concave mating of the cylinder block and the head plate or the connecting plate, the one with a large coefficient of thermal expansion of the material is designed as a convex type, and the one with a small coefficient of thermal expansion of the material is designed as a concave type; the cylinder blocks of the same material are designed as convex type interfaces.

8. The sealing and lubricating system of the rotary engine according to claim 1, characterized in that, On the inner side of the head plate, there is a head plate end face; the head plate end face is provided with a head plate end face oil supply hole, and lubricating oil is supplied to the rotor end face oil seal system through an oil pump; A connecting plate is arranged between multiple cylinder blocks, and connecting plate end faces are provided on both sides of the connecting plate. Connecting plate end face oil supply holes are provided on both sides of the connecting plate, and lubricating oil is supplied to the rotor end face oil seal system through an oil pump.

9. The sealing and lubrication system of the rotary engine according to claim 1, wherein: The cylinder block is provided with an intake passage and an exhaust passage, which are respectively communicated with the intake chamber and the working chamber; An injector is arranged in the intake chamber; a spark plug is arranged in the compression chamber; Cylinder block external connection bolt interfaces are connected to the head plate through a group of housing connection bolts.

10. The working method of the sealing and lubricating system of the rotary engine according to claim 1, characterized in that, It includes the following steps: The head plate end face oil supply hole arranged on the head plate or the connecting plate end face oil supply hole arranged on the connecting plate is pressurized and sprayed by an oil pump into the upper groove of the end face sealing ring at the tangent connection end face of the inner ring gear of the rotor and the stator gear, and then flows into the lower groove of the end face sealing ring and the circular ring bearing cage through the end face sealing ring oil guiding hole, and is transmitted to the moving end face oil seal balls to achieve the self-lubrication of the end face oil seal system; The lubricating oil passing through the end face sealing rotating ring randomly enters the lower recess of the oil seal groove at the bottom of the oil seal groove of the rotor end face, and enters the common rotor lubricating oil passage through the oil guiding hole of the oil seal groove; One way for the lubricating oil is to pass through the end face oil guiding hole to enter the end face airtight part installation groove and the end face seal bearing cage, and is transmitted to the surface of the moving end face seal roller, thus completing the lubrication and cooling of the moving parts of the end face airtight system; Another way for the lubricating oil is to enter the radial seal part installation groove through the radial oil guiding hole, and then is transmitted to the surface of the moving drag reduction roller through the radial seal bearing cage, and then is transmitted to the radial seal roller by the drag reduction roller. Another way is to enter the end face seal ball track groove through the track groove lubricating oil supply hole to supply oil for lubrication to the end rolling seal ball and the built-in spring cage, thus completing the lubrication and cooling of the moving parts of the radial seal system.

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