Mechanical sealing element of engine

Abstract

The invention relates to the technical field of mechanical sealing, in particular to an engine mechanical sealing part which comprises a connecting assembly, a rotating assembly and a sealing assembly, the connecting assembly comprises a static ring part, the static ring part comprises a static ring seat, the rotating assembly comprises a movable ring seat and an elastic compensation part, a crankshaft penetrates through the movable ring seat and is connected to the movable ring seat, and the elastic compensation part comprises a sliding barrel. The side, close to the movable ring base, of the static ring base is provided with a sealing groove allowing the sliding cylinder to stretch into, the sliding cylinder is elastically and slidably connected to the movable ring base, the crankshaft penetrates through the sliding cylinder, and a sealing gap is formed between the side, away from the movable ring base, of the sliding cylinder and the static ring base. The sealing assembly comprises a plurality of sealing pieces, a plurality of hinge grooves are evenly formed in the outer side wall of the sliding cylinder, each sealing piece comprises a rotating plate and a torsional spring, the rotating plates are matched with the hinge grooves and rotationally connected to the sliding cylinder, and the sides, close to the static ring base, of the rotating plates and the sliding cylinder are connected with the multiple rotating plates through the torsional springs to form the fan effect. The invention has the effect of reducing the abrasion loss of the moving ring and the static ring.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical seals, and in particular to an engine mechanical seal. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by maintaining contact and relative sliding between at least one end face perpendicular to the axis of the rotating shaft under the action of fluid pressure, the elastic force of a compensation mechanism, and the cooperation of an auxiliary seal. At present, with the continuous improvement of the degree of industrial automation, the requirements for high efficiency and long life of mechanical equipment are increasing. Especially in core components such as engines, the sealing performance directly affects the stability and safety of the entire system.

[0003] In related technologies, various methods are commonly used to effectively seal the fluid inside the engine. For example, a fixed sleeve is placed on the exterior of the shaft and cooperates with a dynamic ring to form a sealing surface; elastic elements such as springs are used to provide compression to enhance the sealing effect; or special structures such as grooves are machined into the shaft surface to optimize fluid distribution. Furthermore, the overall performance of the sealed shaft is improved by adding auxiliary seals such as static rings and using high-strength materials. These methods are widely used in different application scenarios to meet diverse sealing needs.

[0004] Regarding the above-mentioned related technologies, the sealing shafts in the existing technology generally have the problem of insufficient stability of the sealing contact surface, and there may be a problem of poor sealing due to uneven distribution of sealing oil. In addition, since the sealing oil cannot flow, the heat generated by the high-speed friction between the dynamic ring and the static ring cannot be dissipated in time, which aggravates the wear and loss of the dynamic ring and the static ring. Summary of the Invention

[0005] In order to alleviate the problem of wear and loss of the dynamic ring and the static ring, the present application provides an engine mechanical seal.

[0006] The present application provides an engine mechanical seal that adopts the following technical solution: An engine mechanical seal comprises a connecting assembly, a rotating assembly and a sealing assembly, wherein the connecting assembly comprises a stationary ring, the stationary ring comprises a stationary ring seat, the stationary ring seat is connected to a machine case, a crankshaft is passed through the stationary ring seat, the rotating assembly comprises a dynamic ring seat and an elastic compensating member, the dynamic ring seat is connected to a side of the stationary ring seat away from an inner side of the machine case, the crankshaft is passed through the dynamic ring seat and connected to the dynamic ring seat, the elastic compensating member comprises a sliding cylinder, a sealing groove for the sliding cylinder to extend into is provided on a side of the stationary ring seat close to the dynamic ring seat, the sliding cylinder is elastically slidably connected to the dynamic ring seat, the crankshaft is passed through the sliding cylinder, and a sealing gap is formed between the sliding cylinder and the stationary ring seat on a side away from the dynamic ring seat; The sealing assembly includes multiple sealing members, and multiple hinge grooves are evenly opened on the outer side wall of the sliding cylinder. The sealing members correspond to the hinge grooves one by one. The sealing member includes a rotating plate and a torsion spring. The rotating plate fits into the hinge groove. The rotating plate is rotatably connected to the sliding cylinder. The rotating plate rotates from the sliding cylinder to the static ring seat. The rotating plate is connected to the sliding cylinder through the torsion spring on the side close to the static ring seat. The torsion spring is used to provide rebound force to the rotating plate. The multiple rotating plates form a fan effect.

[0007] By adopting the above technical solution, the connecting assembly connects the static ring seat to the chassis, the dynamic ring seat in the rotating assembly is connected to the machine shaft and cooperates with the static ring seat, the sliding cylinder of the elastic compensation part is elastically slidably connected to the dynamic ring seat and forms a sealing gap with the static ring seat, the rotating plate and the sliding cylinder in the sealing assembly are hinged and provided with rebound force by the torsion spring, and multiple rotating plates form a fan effect. The engine mechanical seal can realize the rotation seal of the machine shaft, and the spring can elastically compensate for the slight changes in the sealing part to ensure the sealing effect; the torsion spring provides rebound force for the rotating plate, and when there is no wear between the sliding cylinder and the static ring seat, the rotating plate fits in the hinge groove, and when it is worn, the rotating plate rotates; multiple rotating plates form a fan effect, which helps the sealing oil to flow and dissipate heat evenly, reduces the wear loss of the dynamic ring and the static ring, improves the reliability and stability of the sealing device, and solves the problem that the existing technology cannot effectively deal with the wear of the sealing components and cause medium leakage.

[0008] In a specific embodiment, the sealing assembly further comprises an elastic member, and when the rotating plate rotates, the radial dimension of the elastic member can be expanded to compensate for the sealing gap.

[0009] By adopting the above technical solution, when a gap is generated between the sliding cylinder and the static ring seat of the engine mechanical seal due to wear, the rotating plate rotates to expand the radial size of the elastic member, which can compensate for the sealing gap, continue to achieve the sealing effect, and improve the reliability and stability of the sealing device.

[0010] In a specific possible implementation scheme, the elastic member is a hoop spring, which is connected to the end of the rotating plate away from the torsion spring, and a sealing ring is provided on the outside of the hoop spring.

[0011] By adopting the above technical solution, the rotating plate and the sliding cylinder in the sealing assembly are hinged and the torsion spring provides rebound force. Multiple rotating plates form a fan effect. On this basis, the elastic member adopts a hoop spring to connect the rotating plate. When the rotating plate rotates, the radial dimension of the hoop spring can be expanded to compensate for the sealing gap. The sealing ring sleeved on the outside of the hoop spring can further enhance the sealing effect, effectively deal with the problem of medium leakage caused by wear of the sealing components, and improve the reliability and stability of the sealing device.

[0012] In a specific embodiment, an oil storage groove is provided in the stationary ring seat, and the oil storage groove is provided on the contact surface between the stationary ring seat and the sliding cylinder to release sealing oil to form an oil film; The stationary ring seat is connected with an oil guide wedge ring in the sealing groove, and the oil guide wedge ring is coaxially arranged with the sliding cylinder.

[0013] By adopting the above technical solution, the oil storage tank can release the sealing oil to form an oil film to seal between the sliding cylinder and the static ring seat; the oil guide wedge ring enables the sealing oil in the oil storage tank to be evenly distributed to different contact surfaces, thereby enhancing the sealing effect.

[0014] In a specific embodiment, the stationary ring further comprises a support seat, and the support seat is located on a side of the stationary ring seat close to the inner side of the chassis; The connecting assembly further includes a fixing member, which includes a fixing screw and a decompression gasket. The decompression gasket is clamped between the support seat and the stationary ring seat and fixed by the fixing screw.

[0015] By adopting the above technical solution, the static ring can be firmly installed on the engine case, and the pressure between the static ring seat and the case fixing screws can be reduced by using the pressure relief gasket, thereby protecting the static ring seat from damage due to excessive pressure.

[0016] In a specific possible implementation scheme, the elastic compensation part includes multiple springs and a gasket, and the dynamic ring seat is provided with a ring groove on the side close to the static ring seat, and the ring groove is coaxially arranged with the machine shaft. The multiple springs are all located in the ring groove, and the multiple springs are evenly spaced along the circumference of the ring groove in the ring groove. The springs are distributed from the dynamic ring seat to one side of the static ring seat, one end of the spring is connected to the dynamic ring seat, and the other ends of the multiple springs are connected to the gasket, the machine shaft passes through the gasket, and the sliding cylinder is connected to the gasket.

[0017] By adopting the above technical solution, multiple springs are evenly spaced circumferentially in the ring groove, providing stable elastic support for the gasket; the setting direction of the spring enables it to expand and contract when axial displacement occurs between the dynamic ring seat and the static ring seat, adjust the position of the gasket and the sliding cylinder, and ensure the sealing stability; the sliding cylinder is connected to the gasket, and the elastic compensation effect of the spring can be transmitted to the sliding cylinder through the gasket, so that the sliding cylinder can better adapt to changes in the sealing part and maintain the stability of the sealing gap.

[0018] In a specific possible implementation scheme, the sliding cylinder is provided with a placement groove near the end of the rotating plate away from the torsion spring, and the rotating plate is provided with a fixing groove at the end away from the torsion spring. When the rotating plate is engaged with the hinge groove, multiple fixing grooves and one placement groove form a guide groove, and the hoop spring is located in the guide groove.

[0019] By adopting the above technical solution, a guide groove is formed when the rotating plate and the hinge groove are engaged, allowing the hoop spring to be located in the guide groove, which can provide an accurate installation position for the hoop spring, making it easier for the rotating plate to drive the hoop spring to expand when rotating to compensate for the sealing gap, thereby enhancing the stability and sealing of the engine mechanical seal.

[0020] In a specific possible implementation scheme, the tip of the oil-guiding wedge ring faces the oil storage groove, and the bottom of the sealing groove smoothly transitions to the outer wall of the stationary ring seat to form an oil film flow channel.

[0021] By adopting the above technical solution, the oil-guiding wedge ring can evenly distribute the sealing oil in the oil storage groove to different contact surfaces; the oil film flow channel formed by the smooth transition between the bottom of the sealing groove and the outer wall of the stationary ring seat can allow excess sealing oil on the contact surface to flow to the oil storage groove under the action of extrusion, so that the sealing oil is effectively in dynamic flow, forming a continuous oil film to achieve the best sealing effect, and at the same time, taking away the heat generated by the high-speed friction between the dynamic ring and the stationary ring during the flow of the sealing oil.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The designed engine mechanical seal can realize the rotating seal of the engine shaft. The spring can elastically compensate for slight changes in the sealing part to ensure the sealing effect. The torsion spring provides rebound force for the rotating plate. When there is no wear between the sliding cylinder and the static ring seat, the rotating plate fits into the hinge groove. When it is worn, the rotating plate rotates. Multiple rotating plates form a fan effect, which helps to evenly flow the sealing oil and dissipate heat, thereby improving the reliability and stability of the sealing device and solving the problem that the existing technology cannot effectively deal with medium leakage caused by wear of sealing components.

[0023] 2. Designed engine mechanical seal, when a gap is generated between the sliding cylinder and the static ring seat of the engine mechanical seal due to wear, the rotating plate rotates to expand the radial size of the elastic member, which can compensate for the sealing gap, continue to achieve the sealing effect, and improve the reliability and stability of the sealing device.

[0024] 3. The engine mechanical seal is designed with an elastic member connected to the rotating plate using a hoop spring. When the rotating plate rotates, the radial dimension of the hoop spring can be expanded to compensate for the sealing gap. The sealing ring sleeved on the outside of the hoop spring can further enhance the sealing effect, effectively addressing the problem of medium leakage caused by wear of the sealing components, and improving the reliability and stability of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the engine mechanical seal according to an embodiment of the present application.

[0026] Figure 2 yes Figure 1 A magnified view of center.

[0027] Figure 3 It is a cross-sectional view in this embodiment.

[0028] Figure 4 Schematic diagram of the structure of the sliding cylinder in this embodiment.

[0029] Figure 5 Schematic diagram of the structure of the rotating plate in this embodiment.

[0030] Explanation of the accompanying drawings: 1. Connecting assembly; 11. Stationary ring; 111. Support seat; 112. Stationary ring seat; 1121. Sealing groove; 1122. Oil storage groove; 1123. Oil guide wedge ring; 12. Fixing member; 121. Fixing screw; 122. Pressure reducing gasket; 2. Rotating assembly; 21. Moving ring seat; 211. Ring groove; 22. Elastic compensation member; 221. Spring; 222. Gasket; 223. Sliding cylinder; 2231. Hinge groove; 3. Sealing assembly; 31. Sealing member; 311. Rotating plate; 3111. Rotating groove; 3112. Connecting rod; 312. Torsion spring; 32. Elastic member. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The embodiment of the present application discloses an engine mechanical seal.

[0033] Reference Figure 1 An engine mechanical seal includes a connecting component 1 and a rotating component 2, wherein the connecting component 1 is arranged on the engine casing, and the rotating component 2 is arranged on the crankshaft.

[0034] Reference Figure 1 and Figure 2, the connecting assembly 1 includes a static ring 11 and a fixing part 12, the static ring 11 includes a support seat 111 and a static ring seat 112, the crankshaft is passed through the support seat 111, the support seat 111 is fixedly connected to the engine box wall by screws, the support seat 111 is generally made of metal, such as stainless steel, which has good strength and corrosion resistance, the static ring seat 112 is located on the side of the support seat 111 away from the engine box, the support seat 111 and the static ring seat 112 are connected by a fixing part 12, the fixing part 12 includes a fixing screw 121 and a decompression gasket 122, the fixing screw 121 is sequentially passed through the support seat 111 and the static ring seat 112, and the fixing screw 121 is threadedly connected to the support seat 111 and the static ring seat 112 in turn, and the fixing screw 121 can fix the support seat 111 and the static ring seat 11 2 fixed, the decompression gasket 122 is located on the side of the fixing screw 121 close to the support seat 111, and the fixing screw 121 is passed through the decompression gasket 122. The decompression gasket 122 is used to reduce the pressure between the static ring seat 112 and the chassis fixing screw 121; the decompression gasket 122 can also be replaced by a silicone gasket 222, which has better flexibility and temperature resistance. The combination logic of the static ring 11 and the fixing part 12 is that the support seat 111 is first fixed to the engine case wall, and then the static ring seat 112 is connected to the support seat 111 through the fixing part 12 to ensure the stable installation of the static ring seat 112 and provide a basis for subsequent sealing work. This combination method enables the connecting assembly 1 to be firmly installed on the engine and protect the static ring seat 112 from damage due to excessive pressure.

[0035] Reference Figure 1 and Figure 2 In this embodiment, in addition to the fixing screws 121 and the pressure-reducing gaskets 122, the fixing member 12 can also adopt a snap-on connection method, wherein the snap-on connection component 1 includes a card block and a card slot, the card block is arranged on the support seat 111, and the card slot is arranged on the static ring seat 112. The card block is generally made of elastic plastic material and has a certain deformation ability. The shape of the card slot is adapted to the card block. When installing, the card block is aligned with the card slot and pressed into the card slot. The card block is clamped in the card slot under the elastic action to achieve the connection between the support seat 111 and the static ring seat 112. This snap-on connection method is easy and quick to install, does not require the use of tools, and can save installation time and labor costs. At the same time, the snap-on connection also has a certain buffering effect, which can reduce the impact of vibration on the connection part to a certain extent. Compared with the connection method of fixing screws 121 and pressure-reducing gaskets 122, the snap-on connection is more suitable for some scenarios with higher requirements for installation speed.

[0036] Reference Figure 1 and Figure 3The rotating assembly 2 includes a dynamic ring seat 21 and an elastic compensation member 22. The dynamic ring seat 21 is located on the side of the static ring seat 112 away from the support seat 111. The machine shaft is passed through the dynamic ring seat 21. The dynamic ring seat 21 is fixedly connected to the machine shaft by screws, and the dynamic ring seat 21 is clamped with the static ring seat 112. The dynamic ring seat 21 is annular, and the elastic compensation member 22 includes multiple springs 221, a gasket 222 and a sliding cylinder 223. The dynamic ring seat 21 is provided with a ring groove 211 on the side close to the static ring seat 112. The ring groove 211 is coaxially arranged with the machine shaft. Multiple springs 221 are all located in the ring groove 211, and multiple springs 221 are evenly spaced along the circumference of the ring groove 211 in the ring groove 211. The spring 221 is distributed from the dynamic ring seat 21 to one side of the static ring seat 112. One end of the spring 221 is welded to the dynamic ring seat 21, and the other ends of multiple springs 221 are welded to the gasket 222. The machine shaft is passed through the gasket 222. In this embodiment, the spring 221 is a coil spring or a corrugated spring. The coil spring has the advantages of simple structure, good elasticity and low cost. Its free length is greater than 1.5 times the axial clearance of the sealing ring. This can ensure that the spring 221 has sufficient elastic deformation space during operation, providing a stable elastic force for the gasket 222. The corrugated spring has the characteristics of small size and uniform elasticity, and can provide a larger elastic force in a smaller space.

[0037] Reference Figure 3The sliding cylinder 223 is located on the side of the gasket 222 away from the spring 221, the shaft is passed through the sliding cylinder 223, the sliding cylinder 223 is fixedly connected to the gasket 222 at one end thereof by screws, the stationary ring seat 112 is provided with a sealing groove 1121 for the sliding cylinder 223 to extend into the end thereof away from the gasket 222 at one side thereof, the sliding cylinder 223 forms a sealing gap with the stationary ring seat 112 at the side thereof away from the gasket 222, and an oil storage groove 1122 is provided in the stationary ring seat 112, and the oil storage groove 1122 is provided at the stationary ring seat 112. 12 and the contact surface of the sliding cylinder 223 to release the sealing oil to form an oil film; the stationary ring seat 112 is provided with an oil guide wedge ring 1123 in the sealing groove 1121. The oil guide wedge ring 1123 is coaxially arranged with the sliding cylinder 223. The oil guide wedge ring 1123 is fixedly connected to the stationary ring seat 112 by screws. When the sealing oil flows out of the oil storage groove 1122, the oil guide wedge ring 1123 enables the sealing oil in the oil storage groove 1122 to be evenly distributed to different contact surfaces. The tip of the oil guide wedge ring 1123 faces the oil storage groove 1122. The bottom of the sealing groove 1121 and the outer wall of the static ring seat 112 smoothly transition to form an oil film flow channel. When there is too much sealing oil on the contact surface, it flows into the oil storage groove 1122 (at this time, the oil storage groove 1122 is a low-pressure area) due to the effect of extrusion. Therefore, in order to facilitate the flow of sealing oil, the oil storage groove 1122 needs to be set near the contact surface. The setting of the oil storage groove 1122 allows the sealing oil on the contact surface to be in effective dynamic flow, thereby forming a continuous oil film (neither the loss of sealing oil will lead to the inability to form a continuous oil film, nor will the increase in the amount of sealing oil cause the oil film to pass and affect the sealing effect) to achieve the best sealing effect. During the flow of sealing oil, it can take away part of the heat generated by the high-speed friction between the dynamic ring and the static ring; the combination logic of the dynamic ring seat 21 and the elastic compensation part 22 is that the dynamic ring seat 21 rotates with the machine shaft, and the spring 221 provides elastic support for the gasket 222 and the sliding cylinder 223. When there is a slight change in the sealing part, the spring 221 can perform elastic compensation to ensure the sealing effect. For example, when there is a slight axial displacement between the dynamic ring seat 21 and the static ring seat 112 , the spring 221 can be expanded or contracted to adjust the positions of the gasket 222 and the sliding cylinder 223 to maintain the stability of the seal.

[0038] Reference Figure 3 、 Figure 4 and Figure 5, an engine mechanical seal also includes a sealing assembly 3, the sealing assembly 3 is arranged on the rotating assembly 2, the sealing assembly 3 includes a plurality of sealing members 31 and an elastic member 32, a hinge groove 2231 is opened on the outer wall of the sliding cylinder 223, the hinge groove 2231 is inclined, and the opening direction of the hinge groove 2231 is at a certain angle (not 0°) to the axis of the sliding cylinder 223, and the plurality of hinge grooves 2231 are evenly spaced along the circumference of the sliding cylinder 223, the hinge groove 2231 can be a curved groove, an arc groove, or a rectangular groove. In this embodiment, the hinge groove 2231 is a rectangular groove, and the sealing member 31 corresponds to the hinge groove 2231 one by one. The sealing member 31 includes a rotating plate 311 and a torsion spring 312, the rotating plate 311 is located in the hinge groove 2231, the rotating plate 311 fits in the hinge groove 2231, and the rotating plate 311 rotates When the cam 312 is in the unlock position, the lever 314 is in the unlock position, and the spring 316 is in the unlock position, so that the cam 314 can be unlocked when the cam 316 is unlocked.

[0039] Reference Figure 3 and Figure 4 When wear occurs between the outer wall of the sliding cylinder 223 and the static ring seat 112, it means that a gap occurs between the sliding cylinder 223 and the static ring seat 112. At this time, the rotating plate 311 rotates from the sliding cylinder 223 to the static ring seat 112, which can make up for the gap caused by the wear between the outer wall of the sliding cylinder 223 and the static ring seat 112, and continue to achieve the sealing effect; when the rotating plate 311 rotates from the sliding cylinder 223 to the static ring seat 112, an oil inlet gap is formed between the rotating plate 311 and the hinge groove 2231. During the rotation of the machine shaft, the oil inlet gap is a low-pressure area, and the sealing oil can enter the oil inlet gap, thereby making the sealing oil flow evenly and enhancing the sealing effect. When the rotating plate 311 rotates, multiple rotating plates 311 form a fan. During the rotation of the sliding cylinder 223, on the one hand, the sealing oil can be blown into the sealing gap, making the sealing oil flow more evenly; on the other hand, the heat generated by the high-speed friction between the dynamic ring and the static ring seat 112 can be cooled.

[0040] Reference Figure 3 and Figure 4When the cam 311 is in the unlock state, the cam 312 is unlocked, and the lock 311 is unlocked, so the cam 312 is unlocked. When the cam 311 is unlocked, the lock 311 is unlocked, and the lock 312 is unlocked. When the cam 311 is unlocked, the lock 311 is unlocked, and the lock 312 is unlocked.

[0041] The implementation principle of an engine mechanical seal in an embodiment of the present application is as follows: when the engine is working, the crankshaft can drive the dynamic ring seat 21 to rotate. During the rotation, when the sealing oil flows out of the oil storage groove 1122, the oil guide wedge ring 1123 enables the sealing oil in the oil storage groove 1122 to be evenly distributed to different contact surfaces, thereby sealing the sliding cylinder 223 and the static ring seat 112. When there is no wear between the outer wall of the sliding cylinder 223 and the static ring seat 112, the rotating plate 311 is located in the hinge groove 2231. At this time, the rotating plate 311 is in engagement with the hinge groove 2231. When the outer wall of the sliding cylinder 223 is in engagement with the static ring seat 112, the rotating plate 311 is in engagement with the hinge groove 2231. When wear occurs between the seats 112, it means that a gap occurs between the sliding cylinder 223 and the static ring seat 112. At this time, the rotating plate 311 rotates from the sliding cylinder 223 to the static ring seat 112. The rotating plate 311 drives the hoop spring to expand, so that the hoop spring has potential energy. The fan effect formed by the rotation of the rotating plate 311 contributes to the uniform flow and heat dissipation of the sealing oil, improves the reliability and stability of the sealing device, and solves the problem that the existing technology cannot effectively deal with the medium leakage caused by the wear of the sealing components. The sealing ring can make up for the gap caused by the wear between the outer wall of the sliding cylinder 223 and the static ring seat 112, and continue to achieve the sealing effect.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An engine mechanical seal, characterized in that: The invention comprises a connecting assembly (1), a rotating assembly (2) and a sealing assembly (3), wherein the connecting assembly (1) comprises a stationary ring (11), the stationary ring (11) comprises a stationary ring seat (112), the stationary ring seat (112) is connected to a chassis, and a shaft is passed through the stationary ring seat (112), and the rotating assembly (2) comprises a dynamic ring seat (21) and an elastic compensation member (22), the dynamic ring seat (21) is connected to a side of the stationary ring seat (112) away from the chassis, and the shaft is passed through the dynamic ring seat (21). The elastic compensating member (22) is connected to the dynamic ring seat (21), and includes a sliding cylinder (223). A sealing groove (1121) for the sliding cylinder (223) to extend into is provided on the side of the static ring seat (112) close to the dynamic ring seat (21). The sliding cylinder (223) is elastically slidably connected to the dynamic ring seat (21), and the machine shaft is passed through the sliding cylinder (223). A sealing gap is formed between the sliding cylinder (223) and the static ring seat (112) on the side away from the dynamic ring seat (21); The sealing assembly (3) includes a plurality of sealing members (31), and a plurality of hinge grooves (2231) are evenly provided on the outer side wall of the sliding cylinder (223). The sealing members (31) correspond to the hinge grooves (2231) one by one. The sealing member (31) includes a rotating plate (311) and a torsion spring (312). The rotating plate (311) fits in the hinge groove (2231). The rotating plate (311) is rotatably connected to the sliding cylinder (223). The rotating plate (311) rotates from the sliding cylinder (223) to the stationary ring seat (112). The rotating plate (311) is connected to the sliding cylinder (223) by the torsion spring (312) on the side close to the stationary ring seat (112). The torsion spring (312) is used to provide a rebound force to the rotating plate (311). The plurality of rotating plates (311) form a fan effect.

2. The engine mechanical seal according to claim 1, characterized in that: The sealing assembly (3) further comprises an elastic member (32), and when the rotating plate (311) rotates, the radial dimension of the elastic member (32) can be expanded to compensate for the sealing gap.

3. The engine mechanical seal according to claim 2, characterized in that: The elastic member (32) is a hoop spring connected to one end of the rotating plate (311) away from the torsion spring (312), and a sealing ring is sleeved on the outside of the hoop spring.

4. The engine mechanical seal according to claim 2, characterized in that: An oil storage groove (1122) is provided in the stationary ring seat (112), and the oil storage groove (1122) is provided on the contact surface between the stationary ring seat (112) and the sliding cylinder (223) to release sealing oil to form an oil film; The stationary ring seat (112) is connected to an oil guide wedge ring (1123) in the sealing groove (1121), and the oil guide wedge ring (1123) is coaxially arranged with the sliding cylinder (223).

5. The engine mechanical seal according to claim 1, characterized in that: The stationary ring component (11) further comprises a support seat (111), and the support seat (111) is located on a side of the stationary ring seat (112) close to the inner side of the chassis; The connecting assembly (1) further comprises a fixing member (12), wherein the fixing member (12) comprises a fixing screw (121) and a decompression gasket (122), wherein the decompression gasket (122) is sandwiched between the support seat (111) and the stationary ring seat (112) and is fixed by the fixing screw (121).

6. The engine mechanical seal according to claim 1, characterized in that: The elastic compensation part (22) includes a plurality of springs (221) and a gasket (222). The dynamic ring seat (21) is provided with a ring groove (211) on one side close to the static ring seat (112). The ring groove (211) is coaxially arranged with the machine shaft. The plurality of springs (221) are all located in the ring groove (211). The plurality of springs (221) are evenly spaced along the circumference of the ring groove (211) in the ring groove (211). The springs (221) are distributed from the dynamic ring seat (21) to one side of the static ring seat (112). One end of the spring (221) is connected to the dynamic ring seat (21), and the other ends of the plurality of springs (221) are all connected to the gasket (222). The machine shaft passes through the gasket (222), and the sliding cylinder (223) is connected to the gasket (222).

7. The engine mechanical seal according to claim 3, characterized in that: The sliding cylinder (223) is provided with a placement groove at one end close to the rotating plate (311) and away from the torsion spring (312), and the rotating plate (311) is provided with a fixing groove at one end away from the torsion spring (312). When the rotating plate (311) is engaged with the hinge groove (2231), a plurality of fixing grooves and one placement groove form a guide groove, and the hoop spring is located in the guide groove.

8. The engine mechanical seal according to claim 4, characterized in that: The tip of the oil-guiding wedge ring (1123) faces the oil storage groove (1122), and the bottom of the sealing groove (1121) and the outer wall of the stationary ring seat (112) smoothly transition to form an oil film flow channel.

Images