Novel 8-shaped rotary engine front and rear end cover sealing structure

Abstract

The invention relates to the technical field of sealing structures, and particularly discloses a novel 8-shaped rotary engine front and rear end cover sealing structure which comprises a cylinder body, a front end cover, a first sealing gasket, a first bolt, a rear end cover and a second sealing gasket. The first sealing gasket is arranged between the front end cover and the cylinder body, the front end cover is fixedly connected with the cylinder body through the first bolt, and the pre-tightening force of the first bolt can enable the first sealing gasket to generate sealing compensation; the second sealing gasket is arranged between the rear end cover and the cylinder body, the rear end cover is fixedly connected with the cylinder body through the second bolt, and the pre-tightening force of the second bolt can enable the second sealing gasket to generate sealing compensation; the problems that an existing gluing seal is small in axial compensation and prone to leakage are solved.

Description

Technical Field

[0001] This invention relates to the field of sealing structure technology, and in particular to a novel sealing structure for the front and rear end caps of an 8-shaped rotor engine. Background Technology

[0002] In the field of power machinery, rotary engines are widely used in automotive, aerospace, and other applications due to their advantages such as compact structure, high power density, and stable operation. Their core working principle involves the rotation of a rotor within an 8-shaped cylinder to achieve a continuous cycle of four strokes: intake, compression, power, and exhaust. The front and rear end caps, as key sealing components of the cylinder block, must isolate the high-temperature, high-pressure combustion gases, circulating coolant, and lubricating oil within the cylinder. If the seals fail, gas leakage will lead to power loss, and the cross-contamination of coolant and oil will damage internal engine components and even cause engine failure. Therefore, a reliable sealing structure for the front and rear end caps is the core guarantee for the stable operation of a rotary engine. However, most existing rotary engine end caps are sealed using an adhesive application method, which has significant drawbacks. Adhesive sealing relies on manual or mechanical application of sealant to the mating surfaces of the end cap and cylinder block. The sealant is achieved by filling the gaps after curing. However, the cured sealant is quite hard and has very little axial sealing compensation capability. When the engine is running, the cylinder block expands due to high temperatures, the end cap vibrates and experiences slight displacement, or there are processing errors on the mating surfaces that cause changes in the gaps. In these situations, the sealant cannot effectively fill the gaps through deformation, easily leading to incomplete sealing. Summary of the Invention

[0003] In view of the technical problem that existing rotary engine front and rear end covers mostly use glue to achieve sealing, which has poor sealing effect, this invention provides a novel sealing structure for the front and rear end covers of an 8-shaped rotary engine.

[0004] The technical solution adopted in this invention is: a novel sealing structure for the front and rear end covers of an 8-shaped rotary engine, comprising a cylinder block, a front end cover, a first sealing gasket, a first bolt, a rear end cover, and a second sealing gasket; the first sealing gasket is disposed between the front end cover and the cylinder block, the front end cover is fixedly connected to the cylinder block by the first bolt, and the preload of the first bolt enables the first sealing gasket to provide sealing compensation; the second sealing gasket is disposed between the rear end cover and the cylinder block, the rear end cover is fixedly connected to the cylinder block by the second bolt, and the preload of the second bolt enables the second sealing gasket to provide sealing compensation; both the first sealing gasket and the second sealing gasket can seal the gas, coolant, and engine oil flowing in the cylinder block of the 8-shaped rotary engine.

[0005] A further provision of the present invention is that the first sealing gasket and the second sealing gasket are both made of non-metallic or metallic materials; when the first sealing gasket is made of non-metallic material, it achieves sealing compensation through the elastic deformation of its own material; when the first sealing gasket is made of metallic material, it achieves sealing compensation through structural deformation.

[0006] A further feature of the present invention is that the first sealing gasket has a single-layer structure or a multi-layer stacked structure; when the first sealing gasket has a multi-layer stacked structure, the layers are bonded together; and the second sealing gasket has the same structure as the first sealing gasket.

[0007] A further provision of the present invention is that the first sealing gasket is provided with a first sealing part, a second sealing part, a third sealing part, a fourth sealing part, and a fifth sealing part corresponding to the sealing gas area, sealing air intake area, sealing exhaust area, sealing coolant area, and sealing oil area of ​​the 8-shaped rotary engine cylinder body, respectively; the second sealing gasket is provided with a sixth sealing part, a seventh sealing part, an eighth sealing part, a ninth sealing part, and a tenth sealing part corresponding to the sealing gas area, sealing air intake area, sealing exhaust area, sealing coolant area, and sealing oil area of ​​the cylinder body, respectively, which are adapted to the first sealing part, the second sealing part, the third sealing part, the fourth sealing part, and the fifth sealing part.

[0008] A further configuration of the present invention is that multiple first bolts are spaced apart circumferentially along the front end cover, each first bolt passing through the front end cover axially and being threadedly fixedly connected to the front end of the cylinder body; multiple second bolts are spaced apart circumferentially along the rear end cover, each second bolt passing through the rear end cover axially and being threadedly fixedly connected to the rear end of the cylinder body.

[0009] A further provision of the present invention is that the deformation compensation method of the second sealing gasket is the same as that of the first sealing gasket.

[0010] A further configuration of the present invention is as follows: the end face of the front cover facing the cylinder body is the front cover fitting surface, the end face of the cylinder body facing the front cover is the cylinder front fitting surface, the thickness of the first sealing gasket is adapted to the preset gap size between the end face of the front cover and the end face of the cylinder body, and one end face of the first sealing gasket is fitted with the end face of the front cover, while the other end face is completely fitted with the end face of the cylinder body; the end face of the rear cover facing the cylinder body is the rear cover fitting surface, the end face of the cylinder body facing the rear cover is the cylinder rear fitting surface, the thickness of the second sealing gasket is adapted to the preset gap size between the end face of the rear cover and the end face of the cylinder body, and one end face of the second sealing gasket is fitted with the end face of the rear cover, while the other end face is fitted with the end face of the cylinder body.

[0011] A further configuration of the present invention is that the front end cover and the cylinder body are detachably fixedly connected; the rear end cover and the cylinder body are detachably fixedly connected by removing each of the first bolts; and the second bolts are removed.

[0012] A further provision of the present invention is that both the first sealing gasket and the second sealing gasket have an oxidation-resistant, corrosion-resistant, and high-temperature-resistant coating.

[0013] The beneficial effects of the present invention are as follows: The present invention solves the problems of small axial compensation and easy leakage of existing adhesive sealant. The front end cover and the second sealing gasket generate deformation compensation through the pre-tightening force of the mounting bolts. Compared with the hard and brittle sealant after curing, the axial sealing compensation capability is greatly improved. It can adapt to the gap changes caused by the thermal expansion of the cylinder block and the vibration of the end cover during engine operation, and avoid poor sealing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the first sealing gasket in this invention; Figure 2 This is a schematic diagram of the cylinder block structure in this invention. Figure 1 ; Figure 3 This is a schematic diagram of the cylinder block structure in this invention. Figure 2 ; Figure 4 This is an exploded structural diagram of the first sealing gasket, the second sealing gasket, and the 8-shaped rotor engine in this invention; Figure 5 This is a schematic diagram of the structure of the second sealing gasket in this invention.

[0015] The diagram is marked as follows: 1. Second sealing gasket; 2. Cylinder block; 3. Sealed combustion gas area; 4. Sealed exhaust gas area; 5. Sealed engine oil area; 6. Sealed coolant area; 7. Sealed intake area; 8. Front cover; 9. Rear cover; 10. First bolt; 11. First sealing gasket; 12. Second bolt; 13. First sealing part; 14. Second sealing part; 15. Third sealing part; 16. Fourth sealing part; 17. Fifth sealing part. Detailed Implementation

[0016] In the description of this invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0017] The following is in conjunction with the appendix Figure 1-4 Further explanation of the present invention. To address the problems mentioned in the background art, the present invention provides a novel sealing structure for the front and rear end covers 9 of an 8-shaped rotary engine, including a cylinder body 2, a front end cover 8, a first sealing gasket 11, a first bolt 10, a rear end cover 9, and a second sealing gasket 1; the first sealing gasket 11 is disposed between the front end cover 8 and the cylinder body 2, and the front end cover 8 is fixedly connected to the cylinder body 2 by the first bolt 10, the preload of the first bolt 10 enabling the first sealing gasket 11 to provide sealing compensation; the second sealing gasket 1 is disposed between the rear end cover 9 and the cylinder body 2, and the rear end cover 9 is fixedly connected to the cylinder body 2 by the second bolt 12, the preload of the second bolt 12 enabling the second sealing gasket 1 to provide sealing compensation; both the first sealing gasket 11 and the second sealing gasket 1 can seal the gas, coolant, and engine oil flowing in the cylinder body 2 of the 8-shaped rotary engine.

[0018] The cylinder block 2 is the core load-bearing component of the engine. The front and rear end caps 9 are used to seal the front and rear openings of the cylinder block 2, respectively. The sealing gaskets are the key medium for achieving a seal between the end caps and the cylinder block 2. The first sealing gasket 11 is sandwiched between the front end cap 8 and the cylinder block 2. When the first bolt 10 is tightened, the preload of the bolt acts on the front end cap 8, thereby compressing the first sealing gasket 11 and causing it to deform to fill the tiny gap between the front end cap 8 and the cylinder block 2. This "sealing compensation" effectively eliminates the risk of leakage caused by machining errors or assembly gaps. The second sealing gasket 1 works on the same principle as the first sealing gasket 11, achieving deformation compensation through the preload of the second bolt 12, ensuring reliable sealing at the rear end. The first and second sealing gaskets 11 can simultaneously seal gases (such as high-temperature combustion gases), coolant (used to cool the cylinder block 2), and engine oil (used to lubricate components).

[0019] In this embodiment, the side face of the front cover 8 facing the cylinder 2 is the front cover 8 mating surface, and the side face of the cylinder 2 facing the front cover 8 is the cylinder 2 front mating surface. The thickness of the first sealing gasket 11 is adapted to the preset gap size between the front cover 8 mating surface and the cylinder 2 front mating surface. One side face of the first sealing gasket 11 is mated to the front cover 8 mating surface, and the other side face is completely mated to the cylinder 2 front mating surface. The side face of the rear cover 9 facing the cylinder 2 is the rear cover 9 mating surface, and the side face of the cylinder 2 facing the rear cover 9 is the cylinder 2 rear mating surface. The thickness of the second sealing gasket 1 is adapted to the preset gap size between the rear cover 9 mating surface and the cylinder 2 rear mating surface. One side face of the second sealing gasket 1 is mated to the rear cover 9 mating surface, and the other side face is mated to the cylinder 2 rear mating surface.

[0020] Although the mating surfaces of the front cover 8 and the cylinder 2, and the rear cover 9 and the cylinder 2, are machined, minor flatness errors or assembly gaps are inevitable. If the thickness of the sealing gasket does not match the gap, an excessively thick gasket will be over-compressed and damaged, while an excessively thin gasket will not fill the gap and leakage will still occur. In this embodiment, the thickness of the first sealing gasket 11 and the second sealing gasket 1 is precisely matched with the preset gap, ensuring that the first sealing gasket 11 and the second sealing gasket 1, under the action of bolt pre-tightening force, precisely fill the gap between the mating surfaces, and the two end faces are completely fitted with the mating surfaces of the end cover and the cylinder 2, respectively, maximizing the sealing contact area. This avoids the local gaps caused by insufficient fit of traditional sealing gaskets, further reducing the risk of multi-media leakage, and also reducing the situation of excessive local stress on the sealing gasket, extending its service life. For example, when there is a slight depression on the front mating surface of the cylinder 2, the sealing gasket of the appropriate thickness can naturally fill the depression after being compressed, ensuring the continuity of the seal.

[0021] The front end cover 8 is detachably fixed to the cylinder body 2; the rear end cover 9 is detachably fixed to the cylinder body 2 by removing the first bolts 10; and the second end cover 9 is detachably fixed to the cylinder body 2 by removing the second bolts 12. Both the first sealing gasket 11 and the second sealing gasket 1 have oxidation-resistant, corrosion-resistant and high-temperature-resistant coatings.

[0022] The detachable connection greatly facilitates engine maintenance and repair: when the gasket ages or is damaged and needs replacement, or when internal components of the cylinder block 2 need repair, the entire engine does not need to be disassembled; simply removing the corresponding mounting bolts allows for the separation of the front cover 8 or the rear cover 9. This simple operation saves maintenance time. The oxidation-resistant, corrosion-resistant, and high-temperature-resistant coatings on the first gasket 11 and the second gasket 1 are designed for the harsh operating conditions of the 8-rotor engine—during engine operation, the internal temperature of the cylinder block 2 is extremely high, and corrosive gases, coolant, and engine oil produced by combustion are present. Traditional gaskets are prone to oxidation and hardening at high temperatures and aging and breaking down in corrosive media, leading to seal failure. This coating effectively isolates the gasket body from the erosion of high temperatures and corrosive substances, slowing down the aging rate of the gasket.

[0023] In this embodiment, both the first sealing gasket 11 and the second sealing gasket 1 are made of non-metallic or metallic materials. When the first sealing gasket 11 is made of non-metallic material, it achieves sealing compensation through the elastic deformation of its own material. When the first sealing gasket 11 is made of metallic material, it achieves sealing compensation through structural deformation. The deformation compensation method of the second sealing gasket 1 is the same as that of the first sealing gasket 11.

[0024] Non-metallic gaskets commonly include nitrile rubber gaskets and fluororubber gaskets. Nitrile rubber has good elasticity and oil resistance, making it suitable for sealing oil-related areas in engines. When the bolts are pre-tightened, the nitrile rubber gasket deforms due to its elasticity, tightly filling the gaps between the mating surfaces to achieve sealing compensation. Fluororubber gaskets have superior high-temperature resistance and corrosion resistance, making them suitable for sealing near combustion gas areas. Even in high-temperature combustion gas environments, they maintain their elastic deformation capacity, preventing seal failure. Metallic gaskets are mostly copper gaskets and stainless steel-coated gaskets. Copper gaskets are relatively soft and undergo slight structural deformation (such as surface micro-deformation) under pre-tightening force, conforming to the irregular patterns of the mating surfaces. Copper also has strong high-temperature resistance, making it suitable for high-temperature and high-pressure combustion gas sealing areas. Stainless steel-coated gaskets have a stainless steel outer layer and are filled with flexible material inside. During pre-tightening, the outer stainless steel layer deforms according to the shape of the mating surface, while the internal flexible material helps fill tiny gaps, combining the high-temperature resistance of metal with the sealing compensation capability of flexible material. The two materials and corresponding deformation compensation methods can be flexibly selected according to the working conditions of different parts of the engine (such as temperature, pressure, and medium type).

[0025] In this embodiment, the first sealing gasket 11 has a single-layer structure or a multi-layer stacked structure; when the first sealing gasket 11 has a multi-layer stacked structure, the layers are bonded together; the structure of the second sealing gasket 1 is the same as that of the first sealing gasket 11.

[0026] The single-layer structure of the first sealing gasket 11 is suitable for areas in the engine with relatively low sealing requirements and mild operating conditions (such as parts of the coolant circulation channels). The single-layer gasket can quickly deform under preload, achieving a basic seal. Multi-layer structures (such as multi-layered metal sheets or composite metal and non-metal sheets) offer superior sealing performance and durability: the contact surfaces between multiple layers further increase the sealing contact area, reducing leakage paths; when facing large gaps in the contact surfaces, the multi-layer structure can more fully fill the gaps through the synergistic deformation of each layer, and the multi-layer design can disperse local pressure, preventing damage from excessive stress on a single surface. For example, in the combustion gas sealing area, a gasket with multiple layers of stainless steel sheets can adapt to the gaps through the structural deformation of each metal layer, and the superimposed strength of the multi-layer structure can resist the impact of high-temperature, high-pressure combustion gases, extending the gasket's service life. This flexible structural design can be selected according to the sealing needs of different areas of the engine, balancing sealing performance and cost control.

[0027] In this embodiment, the first sealing gasket 11 is provided with a first sealing part 13, a second sealing part 14, a third sealing part 15, a fourth sealing part 16, and a fifth sealing part 17 corresponding to the sealing gas region 3, sealing air intake region 7, sealing exhaust region 4, sealing coolant region 6, and sealing oil region 5 of the 8-shaped rotary engine cylinder 2; the second sealing gasket 1 is provided with a sixth sealing part, a seventh sealing part, an eighth sealing part, a ninth sealing part, and a tenth sealing part, which are adapted to the first sealing part 13, the second sealing part 14, the third sealing part 15, the fourth sealing part 16, and the fifth sealing part 17, respectively.

[0028] The internal media characteristics and sealing requirements of different regions within the cylinder block 2 of the 8-rotor engine vary greatly: the gas combustion sealing region 3 has high pressure and high temperature, requiring extremely strong sealing performance; the intake sealing region 7 has lower pressure, but needs to prevent external impurities from entering; the exhaust sealing region 4 has high temperature and corrosive gases; the coolant sealing region 6 needs to prevent coolant leakage; and the oil sealing region 5 needs to be oil-resistant and leak-proof. The first sealing part 13 (corresponding to the gas combustion region) can use a thicker metal material or a multi-layer structure to enhance its resistance to high temperature and high pressure; the fourth sealing part 16 (corresponding to the coolant region) can use a non-metallic material with strong water resistance to improve the leak-proof effect. Each sealing part works independently yet collaboratively, effectively blocking cross-flow between different media (such as preventing gas combustion from seeping into the coolant channel and contaminating the coolant, and preventing oil leakage into the exhaust region and causing combustion), ensuring the independent and stable operation of each system of the engine, and significantly improving the overall sealing reliability.

[0029] Multiple first bolts 10 are spaced apart along the circumference of the front end cover 8. Each first bolt 10 passes through the front end cover 8 along the axial direction and is threadedly fixed to the front end of the cylinder body 2. Multiple second bolts 12 are spaced apart along the circumference of the rear end cover 9. Each second bolt 12 passes through the rear end cover 9 along the axial direction and is threadedly fixed to the rear end of the cylinder body 2.

[0030] In this embodiment, the mounting bolts are spaced apart circumferentially along the end cover, ensuring that the bolt preload is evenly distributed on the end cover and the gasket. If the bolts are unevenly distributed, insufficient preload in some areas will lead to inadequate deformation of the gasket and leakage; while excessive preload in some areas may damage the gasket or the end cover. Multiple bolts axially penetrate the end cover and are threaded to the cylinder block 2, which can stably fix the end cover to the cylinder block 2, preventing the end cover from shifting due to vibration during engine operation, thereby damaging the sealing structure.

[0031] The usage method of this embodiment is as follows: First, prepare the matching first sealing gasket 11, second sealing gasket 1, and corresponding mounting bolts. Check whether the oxidation-resistant, corrosion-resistant, and high-temperature-resistant coating on the surface of the sealing gasket is intact. Confirm that the material (such as non-metallic fluororubber gasket or metallic copper gasket), structural form (single layer or multiple layers), and partitioned sealing parts (such as first sealing part 13, fourth sealing part 16, etc.) of the sealing gasket match the corresponding areas of the engine cylinder block 2. Then, place the engine cylinder block 2 on a stable assembly platform and install the first sealing gasket 11 first: The first sealing gasket 11... Sealing parts 13, 14, 15, 16, and 17 are respectively aligned with the sealing gas area 3, intake area 7, exhaust area 4, coolant area 6, and oil area 5 on the front end contact surface of the cylinder block 2, ensuring that the sealing gaskets are fully in contact with the front end contact surface of the cylinder block 2 without any misalignment; then, the front end cover 8 is placed on top, so that the contact surface of the front end cover 8 is fully in contact with the other end face of the first sealing gasket 11, and the first bolt 10 is inserted through the bolt holes along the circumference of the front end cover 8, aligning with the threaded holes at the front end of the cylinder block 2. Then screw it in, gradually applying preload in a "diagonally evenly tightened" sequence until the bolt preload causes the first sealing gasket 11 to produce appropriate sealing compensation (slight elastic deformation is observed in non-metallic gaskets, and fine structural deformation is observed in metallic gaskets), ensuring that the front end cover 8 is firmly fixed to the cylinder body 2 and the seal is reliable; then install the second sealing gasket 1 and the rear end cover 9: using the same method as the front end cover 8, align the sixth to tenth sealing parts of the second sealing gasket 1 with the corresponding areas of the rear end contact surface of the cylinder body 2, and after covering the rear end cover 9, insert the second bolt 12, and tighten it diagonally evenly as well. Apply pre-tightening force in a tight manner to make the second sealing gasket 1 produce sealing compensation; after installation, perform air tightness and sealing tests on the engine (such as introducing test gas to check for leakage in the combustion gas area, introducing coolant to check for leakage in the coolant area, and injecting engine oil to check for leakage in the engine oil area). Once it is confirmed that there is no leakage, it can be put into use; when maintenance or replacement of the sealing gasket is required, first remove the mounting bolts of the corresponding end cover (remove the first bolt 10 for the front end cover 8, and the second bolt 12 for the rear end cover 9), remove the end cover, replace the new sealing gasket, and then reassemble according to the above installation steps.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Although embodiments of the invention have been shown and described, the scope of the invention will be defined by the appended claims and their equivalents by those skilled in the art.

Claims

1. A novel sealing structure for the front and rear end covers of an 8-shaped rotary engine, characterized in that, The system includes a cylinder block (2), a front end cover (8), a first sealing gasket (11), a first bolt (10), a rear end cover (9), and a second sealing gasket (1). The first sealing gasket (11) is disposed between the front end cover (8) and the cylinder block (2). The front end cover (8) is fixedly connected to the cylinder block (2) by the first bolt (10). The preload of the first bolt (10) can cause the first sealing gasket (11) to produce sealing compensation. The second sealing gasket (1) is disposed between the rear end cover (9) and the cylinder block (2). The rear end cover (9) is fixedly connected to the cylinder block (2) by the second bolt (12). The preload of the second bolt (12) can cause the second sealing gasket (1) to produce sealing compensation. Both the first sealing gasket (11) and the second sealing gasket (1) can seal the gas, coolant, and engine oil flowing in the cylinder block (2) of the 8-shaped rotor engine.

2. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, The first sealing gasket (11) and the second sealing gasket (1) are both made of non-metallic or metallic materials. When the first sealing gasket (11) is made of non-metallic material, it achieves sealing compensation through the elastic deformation of its own material. When the first sealing gasket (11) is made of metallic material, it achieves sealing compensation through structural deformation.

3. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, The first sealing gasket (11) has a single-layer structure or a multi-layer stacked structure; when the first sealing gasket (11) has a multi-layer stacked structure, the layers are bonded together; the second sealing gasket (1) has the same structure as the first sealing gasket (11).

4. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, The first sealing gasket (11) is provided with a first sealing part (13), a second sealing part (14), a third sealing part (15), a fourth sealing part (16) and a fifth sealing part (17) respectively corresponding to the sealing gas area (3), sealing air intake area (7), sealing exhaust area (4), sealing coolant area (6) and sealing oil area (5) of the 8-shaped rotor engine cylinder (2); the second sealing gasket (1) is provided with a sixth sealing part, a seventh sealing part, an eighth sealing part, a ninth sealing part and a tenth sealing part respectively corresponding to the sealing gas area (3), sealing air intake area (7), sealing exhaust area (4), sealing coolant area (6) and sealing oil area (5) of the cylinder (2).

5. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, Multiple first bolts (10) are spaced apart circumferentially along the front end cover (8), and each first bolt (10) passes through the front end cover (8) axially and is threadedly fixed to the front end of the cylinder body (2); multiple second bolts (12) are spaced apart circumferentially along the rear end cover (9), and each second bolt (12) passes through the rear end cover (9) axially and is threadedly fixed to the rear end of the cylinder body (2).

6. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 2, characterized in that, The deformation compensation method of the second sealing gasket (1) is the same as that of the first sealing gasket (11).

7. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, The end face of the front cover (8) facing the cylinder body (2) is the fitting surface of the front cover (8), and the end face of the cylinder body (2) facing the front cover (8) is the fitting surface of the front end of the cylinder body (2). The thickness of the first sealing gasket (11) is adapted to the preset gap size between the fitting surface of the front cover (8) and the fitting surface of the front end of the cylinder body (2). One end face of the first sealing gasket (11) is fitted with the fitting surface of the front cover (8), and the other end face is completely fitted with the fitting surface of the front end of the cylinder body (2). The end face of the rear cover (9) facing the cylinder (2) is the mating surface of the rear cover (9), and the end face of the cylinder (2) facing the rear cover (9) is the mating surface of the cylinder (2). The thickness of the second sealing gasket (1) is adapted to the preset gap size between the mating surface of the rear cover (9) and the mating surface of the cylinder (2). One end face of the second sealing gasket (1) is mated to the mating surface of the rear cover (9), and the other end face is mated to the mating surface of the cylinder (2).

8. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, The front end cover (8) and the cylinder body (2) are detachably fixedly connected; by removing each of the first bolts (10), the rear end cover (9) and the cylinder body (2) are detachably fixedly connected; by removing each of the second bolts (12).

9. The novel 8-shaped rotor engine front and rear end cover sealing structure according to claim 1, characterized in that, Both the first sealing gasket (11) and the second sealing gasket (1) have oxidation-resistant, corrosion-resistant and high-temperature-resistant coatings.

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