Piston assembly

Abstract

The piston assembly comprises a piston body and a cooling oil duct, a piston rod is movably connected to the interior of one end of the piston body, and a first assembly clamping groove, a second assembly clamping groove, a third assembly clamping groove and a fourth assembly clamping groove are sequentially formed in the end, away from the piston rod, of the piston body. When the multi-stage supporting sealing protection structure is used, the first assembling clamping groove, the second assembling clamping groove, the third assembling clamping groove and the fourth assembling clamping groove are sequentially formed in the piston body, and the air sealing ring for oil sealing, the oil scraping ring, the piston ring and the supporting ring are sequentially arranged in the four installing groove structures in a sleeved mode, so that the multi-stage supporting sealing protection structure is achieved; the oil scraper ring, the air seal ring for the oil seal, the supporting ring and the piston ring can be conveniently sleeved on the piston body through the installation reserved notches, and the sealing effect of the piston structure and the cylinder wall can be guaranteed through the shielding between the adjacent installation reserved notches through the staggered arrangement of the four installation reserved notches on the piston body.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield and mine, and specifically relates to a piston assembly. Background Technique

[0002] The piston assembly is one of the most important structures inside the compressor used in oilfield and mine. Its performance directly affects the efficiency, reliability and emission level of the compressor. The piston assembly can often achieve energy conversion, seal the combustion chamber, heat transfer function and guiding function. However, there are still some defects when the piston assembly is specifically used.

[0003] When the piston assembly reciprocates inside the compressor, there are often problems of frictional damage and large heat loss, which will cause the piston assembly to be easily deformed and damaged. Moreover, the protective structure on the piston assembly is single, and it generally does not integrate an oil seal with a gas seal ring, an oil scraping ring, a piston ring and a support ring to achieve comprehensive multi-stage support and sealing protection. Based on this, we propose a new type of piston assembly to provide better use effects. Content of the Utility Model

[0004] The purpose of the utility model is to provide a piston assembly to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A piston assembly includes a piston body and a cooling oil passage. A piston rod is movably connected inside one end of the piston body. The end of the piston body away from the piston rod is sequentially provided with a first assembly slot, a second assembly slot, a third assembly slot and a fourth assembly slot. An oil seal with a gas seal ring is sleeved on the first assembly slot, an oil scraping ring is sleeved on the second assembly slot, a piston ring is sleeved on the third assembly slot, and a support ring is sleeved on the fourth assembly slot. Ball head connecting rods are evenly arranged between the support ring and the piston ring. Adaptive guiding vanes are evenly connected to the piston ring. A spring support spring is arranged between the adaptive guiding vane and the piston ring. The cooling oil passage is arranged at the middle position inside the piston body. A main oil pipe is fixed inside the cooling oil passage. One end of the main oil pipe is evenly connected with branch oil pipes, and the other end of the main oil pipe is provided with an oil inlet threaded pipe.

[0006] Preferably, a rotary bearing is arranged between the piston rod and the piston body.

[0007] Preferably, balls are evenly arranged on the outer side wall of the support ring.

[0008] Preferably, the adaptive guiding vanes are arranged at equal angles on the outer side wall of the piston ring.

[0009] Preferably, installation reserved notches are provided on the oil scraping ring, the air sealing ring for the oil seal, the support ring, and the piston ring. The installation reserved notches are arranged in a staggered manner on the piston body, which not only facilitates the sleeving of the oil scraping ring, the air sealing ring for the oil seal, the support ring, and the piston ring on the piston body by using the installation reserved notches, but also ensures the sealing effect between the piston structure and the cylinder wall through the staggered arrangement of the four installation reserved notches on the piston body and the shielding between adjacent installation reserved notches.

[0010] Preferably, a connecting hose is threadedly connected to the oil inlet threaded pipe, and a reserved through port matching the connecting hose is provided on one side of the cooling oil passage, making it convenient for the oil inlet threaded pipe to be externally connected to an oil pump through the connecting hose.

[0011] Preferably, a one-way valve is installed on the oil inlet threaded pipe.

[0012] Preferably, there are 6 branch oil pipes. One end of each branch oil pipe penetrates through the side wall of the cooling oil passage and extends to the outer side wall of the piston body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) By installing branch oil pipes and the like, the piston structure optimizes its own performance. The user can connect the connecting hose passing through the reserved through port to an oil pump. During subsequent operation, the oil pump is started to continuously pump cooling oil into the main oil pipe, and then it is evenly sprayed onto the outer wall of the piston body through six evenly distributed branch oil pipes, realizing the functions of heat dissipation protection and friction lubrication. This improves the use effect of the piston structure and reduces the deformation and damage problems caused by heat loss and friction.

[0015] (2) By installing an air sealing ring for the oil seal and the like, the piston structure optimizes its own structure. On the one hand, the thermal expansion effect of the air sealing ring for the oil seal is used to enhance the oil seal protection of the piston body, and the oil scraping ring is used to achieve oil scraping protection and reduce the problem of viscous blockage. On the other hand, the self-adaptive guiding blades evenly arranged on the piston ring and connected by spring struts can make the self-adaptive guiding blades adapt to the shape of the cylinder wall depending on the elastic action of the spring struts to ensure the control of the oil film thickness. Moreover, by setting a support ring connected by a ball head connecting rod on the piston ring, the piston ring can be limited and guided. Then, combined with the rolling contact of the balls arranged on the outer wall of the support ring on the cylinder wall, the piston body and the cylinder wall can be supported and guided, avoiding the problem of large local friction caused by side deviation and extending the service life.

[0016] (3) By providing a second assembly card slot and other components, when the piston assembly is in use, a first assembly card slot, a second assembly card slot, a third assembly card slot, and a fourth assembly card slot are sequentially arranged on the piston body, and an air seal ring for oil seal, an oil scraping ring, a piston ring, and a support ring are sequentially sleeved inside these four installation slot structures, realizing a multi-stage support sealing protection structure. Moreover, by using the installation reserved notch, it is convenient to sleeve the oil scraping ring, the air seal ring for oil seal, the support ring, and the piston ring on the piston body. Also, through the staggered arrangement of the four installation reserved notches on the piston body and the shielding between adjacent installation reserved notches, the sealing effect between the piston structure and the cylinder wall can be ensured. Brief Description of the Drawings

[0017] Figure 1 It is a front view partial sectional structure schematic diagram of the present utility model;

[0018] Figure 2 It is a rear view structure schematic diagram of the piston rod of the present utility model;

[0019] Figure 3 It is a front view partial sectional structure schematic diagram of the cooling oil passage of the present utility model;

[0020] Figure 4 It is a side view structure schematic diagram of the air seal ring for oil seal of the present utility model;

[0021] Figure 5 For the present utility model Figure 1 The enlarged structure schematic diagram at position A in it.

[0022] In the figure: 1. Piston rod; 2. Piston body; 3. Oil scraping ring; 4. First assembly card slot; 5. Second assembly card slot; 6. Third assembly card slot; 7. Fourth assembly card slot; 8. Cooling oil passage; 9. Air seal ring for oil seal; 10. Rotary bearing; 11. Connecting hose; 12. Oil inlet threaded pipe; 13. Check valve; 14. Main oil pipe; 15. Branch oil pipe; 16. Reserved through hole; 17. Installation reserved notch; 18. Ball; 19. Support ring; 20. Ball head connecting rod; 21. Adaptive guide vane; 22. Spring support spring; 23. Piston ring. Detailed Description of the Preferred Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-5, An embodiment provided by the present utility model: A piston assembly includes a piston body 2 and a cooling oil passage 8. One end of the piston body 2 is movably connected with a piston rod 1 inside. At the end of the piston body 2 away from the piston rod 1, a first assembly card slot 4, a second assembly card slot 5, a third assembly card slot 6, and a fourth assembly card slot 7 are sequentially arranged;

[0025] An air seal ring 9 for oil seal is sleeved on the first assembly card slot 4, an oil scraping ring 3 is sleeved on the second assembly card slot 5, a piston ring 23 is sleeved on the third assembly card slot 6, and a support ring 19 is sleeved on the fourth assembly card slot 7;

[0026] Installation reserved notches 17 are provided on the oil scraping ring 3, the air seal ring 9 for oil seal, the support ring 19, and the piston ring 23. The installation reserved notches 17 are arranged in a staggered manner on the piston body 2, which not only facilitates the sleeving of the oil scraping ring 3, the air seal ring 9 for oil seal, the support ring 19, and the piston ring 23 on the piston body 2 by using the installation reserved notches 17, but also ensures the sealing effect between the piston structure and the cylinder wall through the staggered arrangement of the four installation reserved notches 17 on the piston body 2 and the shielding between adjacent installation reserved notches 17;

[0027] During use, by sequentially arranging the first assembly card slot 4, the second assembly card slot 5, the third assembly card slot 6, and the fourth assembly card slot 7 on the piston body 2, and sequentially sleeving the air seal ring 9 for oil seal, the oil scraping ring 3, the piston ring 23, and the support ring 19 inside these four installation slot structures, a multi-stage support sealing protection structure is realized. Moreover, the oil seal protection of the piston body 2 is improved by using the thermal expansion effect of the air seal ring 9 for oil seal, and the oil scraping protection is realized by using the oil scraping ring 3, reducing the problem of viscous blockage;

[0028] Ball head connecting rods 20 are evenly arranged between the support ring 19 and the piston ring 23. Adaptive guiding vanes 21 are evenly connected to the piston ring 23. A spring strut 22 is arranged between the adaptive guiding vanes 21 and the piston ring 23;

[0029] Ball beads 18 are evenly arranged on the outer side wall of the support ring 19;

[0030] During use, the adaptive guiding vanes 21 evenly arranged on the piston ring 23 and connected by the spring strut 22 can rely on the elastic action of the spring strut 22 to make the adaptive guiding vanes 21 adapt to the shape of the cylinder wall, ensuring the control of the oil film thickness. Moreover, by arranging the support ring 19 connected by the ball head connecting rods 20 on the piston ring 23, the piston ring 23 can be limited and guided. Coupled with the rolling contact action of the ball beads 18 arranged on the outer wall of the support ring 19 on the cylinder wall, the piston body 2 and the cylinder wall can be supported and guided, avoiding the problem of large local friction caused by side deviation, and extending the service life;

[0031] The cooling oil passage 8 is arranged at the middle position inside the piston body 2. A main oil pipe 14 is fixed inside the cooling oil passage 8. One end of the main oil pipe 14 is evenly connected with branch oil pipes 15, and the other end of the main oil pipe 14 is provided with an oil inlet threaded pipe 12;

[0032] An oil inlet threaded pipe 12 is threadedly connected with a connecting hose 11. A reserved through port 16 matching the connecting hose 11 is arranged on one side of the cooling oil passage 8, so that it is convenient for the oil inlet threaded pipe 12 to be externally connected to an oil pump through the connecting hose 11;

[0033] A check valve 13 is installed on the oil inlet threaded pipe 12;

[0034] There are 6 branch oil pipes 15. One end of each branch oil pipe 15 penetrates through the side wall of the cooling oil passage 8 and extends to the outer side wall of the piston body 2;

[0035] During use, the user can connect the connecting hose 11 passing through the reserved through port 16 to an installed oil pump. During subsequent operation, the oil pump is started to continuously pump cooling oil into the interior of the main oil pipe 14, and then it is evenly sprayed onto the outer wall of the piston body 2 through the six evenly distributed branch oil pipes 15, realizing the functions of heat dissipation protection and friction lubrication, which improves the use effect of the piston structure and reduces the deformation and damage problems caused by heat loss and friction;

[0036] A rotary bearing 10 is arranged between the piston rod 1 and the piston body 2;

[0037] The adaptive guide vanes 21 are arranged at equal angles on the outer side wall of the piston ring 23.

[0038] When the embodiment of the present application is in use: The user can install the piston body 2 inside the cylinder wall of an automobile engine, and then install the piston rod 1, which is movably connected to the front end of the piston body 2 through a rotary bearing 10, on the driving mechanism. During actual use, a first assembly slot 4, a second assembly slot 5, a third assembly slot 6, and a fourth assembly slot 7 are sequentially arranged on the piston body 2, and an air seal ring 9 for oil seal, an oil scraping ring 3, a piston ring 23, and a support ring 19 are sequentially sleeved inside these four installation slot structures, realizing a multi-stage support and sealing protection structure. Moreover, the oil seal protection of the piston body 2 is enhanced by the thermal expansion effect of the air seal ring 9 for oil seal, and the oil scraping protection is realized by the oil scraping ring 3, reducing the problem of viscous blockage. The self-adaptive guide vanes 21 uniformly arranged on the piston ring 23 and connected by a spring strut 22 can rely on the elastic action of the spring strut 22 to make the self-adaptive guide vanes 21 adapt to the shape of the cylinder wall, ensuring the control of the oil film thickness. And, by arranging a support ring 19 connected through a ball head link 20 on the piston ring 23, the piston ring 23 can be limited and guided. Coupled with the rolling contact effect of the balls 18 arranged on the outer wall of the support ring 19 on the cylinder wall, the piston body 2 and the cylinder wall can be supported and guided, avoiding the problem of large local friction caused by side deviation and extending the service life. In addition, the user can connect and install an oil pump to the connection hose 11 passing through the reserved through port 16. During subsequent operation, the oil pump is started to continuously pump the cooling oil into the main oil pipe 14, and then it is uniformly sprayed onto the outer wall of the piston body 2 through six uniformly distributed branch oil pipes 15, realizing the functions of heat dissipation protection and friction lubrication. This improves the use effect of the piston structure and reduces the deformation and damage problems caused by heat loss and friction force.

Claims

1. A piston assembly, characterized in that: The invention comprises a piston body (2) and a cooling oil passage (8), wherein one end of the piston body (2) is movably connected to a piston rod (1), and the end of the piston body (2) away from the piston rod (1) is provided with a first assembly slot (4), a second assembly slot (5), a third assembly slot (6) and a fourth assembly slot (7) in sequence, wherein the first assembly slot (4) is provided with an oil seal gas seal ring (9), the second assembly slot (5) is provided with an oil scraper ring (3), the third assembly slot (6) is provided with a piston ring (23), and the fourth assembly slot (7) is provided with a support ring (19). ), a ball head connecting rod (20) is evenly arranged between the support ring (19) and the piston ring (23), an adaptive guide vane (21) is evenly connected to the piston ring (23), a spring support spring (22) is arranged between the adaptive guide vane (21) and the piston ring (23), the cooling oil channel (8) is arranged at a middle position inside the piston body (2), a main oil pipe (14) is fixed inside the cooling oil channel (8), one end of the main oil pipe (14) is evenly connected to a branch oil pipe (15), and the other end of the main oil pipe (14) is provided with an oil inlet threaded pipe (12).

2. A piston assembly according to claim 1, characterized in that: A rotary bearing (10) is provided between the piston rod (1) and the piston body (2).

3. A piston assembly according to claim 1, characterized in that: The outer side wall of the support ring (19) is evenly provided with balls (18).

4. A piston assembly according to claim 1, characterized in that: The adaptive guide blades (21) are arranged at equal angles on the outer side wall of the piston ring (23).

5. A piston assembly according to claim 1, characterized in that: The oil scraper ring (3), the oil seal gas seal ring (9), the support ring (19) and the piston ring (23) are all provided with reserved installation notches (17), and the reserved installation notches (17) are arranged in a staggered manner on the piston body (2).

6. A piston assembly according to claim 1, characterized in that: A connecting hose (11) is threadedly connected to the oil inlet threaded pipe (12), and a reserved opening (16) matching the connecting hose (11) is provided on one side of the cooling oil channel (8).

7. A piston assembly according to claim 1, characterized in that: A one-way valve (13) is installed on the oil inlet threaded pipe (12).

8. A piston assembly according to claim 1, characterized in that: Six branch oil pipes (15) are provided, and one end of each branch oil pipe (15) penetrates the side wall of the cooling oil channel (8) and extends to the outer side wall of the piston body (2).

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