Leakage-proof combined piston ring

Abstract

The utility model discloses a leakproof combined piston ring which comprises a main ring assembly, the main ring assembly comprises a main sealing ring, the outer wall of the main sealing ring is provided with an extrusion slope, the periphery of the extrusion slope is provided with an auxiliary ring assembly, the auxiliary ring assembly comprises an auxiliary sealing ring, and the auxiliary sealing ring is arranged on the periphery of the extrusion slope. The inner wall of the auxiliary sealing ring is provided with an extrusion groove, the extrusion slope is matched with the extrusion groove, the main sealing ring is made of tungsten steel, and the auxiliary sealing ring is made of nitrile rubber. According to the leakage-proof combined type piston ring, extrusion force is generated between the main sealing ring and the auxiliary sealing ring through small changes of the size of the inner wall of the air cylinder, and part of the extrusion force pushes the extrusion grooves to extend towards the two sides through the extrusion slopes, so that the sealing performance between the auxiliary sealing ring and a piston groove is improved, and the sealing effect of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of piston ring technology, specifically a leak-proof combined piston ring. Background Technology

[0002] The leak-proof modular piston ring design aims to improve the sealing performance of piston rings in engines, mechanical equipment, etc., by optimizing material selection, structural design, and working principle, thereby reducing leakage and improving system efficiency and reliability.

[0003] An existing patent (publication number: CN201092898Y) discloses a leak-proof combined piston ring. This device solves the problem of piston rings needing to be aligned during installation and failing to seal effectively by locking the sealing boss.

[0004] However, when the above-mentioned device is in use, due to the setting of the opening and locking sealing boss, when the inner wall size of the cylinder changes slightly under conditions such as high temperature and vibration, gaps will be generated between the opening and the locking sealing boss, which reduces the sealing effect of the device.

[0005] Therefore, there is an urgent need for a leak-proof combined piston ring to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a leak-proof combined piston ring to solve the problem mentioned in the background art, where the connection between the opening and the locking sealing boss will produce gaps when the cylinder inner wall size changes slightly under conditions such as high temperature and vibration, thus reducing the sealing effect of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof combined piston ring, comprising a main ring assembly, the main ring assembly comprising a main sealing ring, the outer wall of the main sealing ring having a compression bevel, an auxiliary ring assembly being provided around the compression bevel, the auxiliary ring assembly comprising an auxiliary sealing ring, the auxiliary sealing ring being provided around the compression bevel, the inner wall of the auxiliary sealing ring having a compression groove, the compression bevel and the compression groove being compatible.

[0008] Preferably, the main sealing ring is made of tungsten carbide, and the auxiliary sealing ring is made of nitrile rubber.

[0009] Preferably, the interior of the extrusion slope is provided with a plurality of expansion grooves, and a connecting rod is provided inside the expansion groove, the connecting rod being fixed to the auxiliary sealing ring.

[0010] Preferably, a limiting groove is formed on the surface of the extrusion slope, and a limiting rod is fixedly connected inside the extrusion groove. The limiting groove and the limiting rod are adapted to each other and slidably connected.

[0011] Preferably, the outer wall of the auxiliary sealing ring is provided with a connecting bevel, and a scraper ring assembly is provided around the connecting bevel.

[0012] Preferably, the scraper ring assembly includes an oil scraper ring, which is fixed to the connecting inclined surface. The inner wall of the oil scraper ring is provided with a connecting groove, which is adapted to the connecting inclined surface.

[0013] Preferably, the oil scraper ring is made of polytetrafluoroethylene.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The present invention provides a leak-proof combined piston ring, which generates a squeezing force between the main sealing ring and the auxiliary sealing ring by a slight change in the inner wall size of the cylinder. Part of the squeezing force pushes the squeezing groove to extend to both sides with the help of the squeezing inclined surface, thereby increasing the sealing performance between the auxiliary sealing ring and the piston groove and improving the sealing effect of the device.

[0016] 2. The present invention provides a leak-proof combined piston ring. When the extrusion slope pushes the extrusion groove to extend to both sides, the connecting rod will continuously pull the auxiliary sealing ring to maintain the connection between the main sealing ring and the auxiliary sealing ring. The expansion groove adapts to the different expansion coefficients between the main sealing ring and the auxiliary sealing ring. In order to prevent the relative movement between the main sealing ring and the auxiliary sealing ring from shifting, the limiting groove and the limiting rod are used to limit the shift, thereby improving the stability of the device. Attached Figure Description

[0017] Figure 1 This is an axial view of the present invention;

[0018] Figure 2 This is a schematic diagram of the main ring assembly structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the auxiliary ring assembly structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the scraper ring assembly structure of this utility model.

[0021] In the diagram: 1. Main ring assembly; 101. Main sealing ring; 102. Extrusion slope; 103. Expansion groove; 104. Connecting rod; 105. Limiting groove; 2. Auxiliary ring assembly; 201. Auxiliary sealing ring; 202. Extrusion groove; 203. Limiting rod; 204. Connecting slope; 3. Scraper ring assembly; 301. Oil scraper ring; 302. Connecting groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 The present invention provides a leak-proof combined piston ring, including a main ring assembly 1, the main ring assembly 1 including a main sealing ring 101, the outer wall of the main sealing ring 101 having a compression slope 102, the compression slope 102 being surrounded by an auxiliary ring assembly 2, the auxiliary ring assembly 2 including an auxiliary sealing ring 201, the auxiliary sealing ring 201 being disposed around the compression slope 102, the inner wall of the auxiliary sealing ring 201 having a compression groove 202, the compression slope 102 and the compression groove 202 being compatible with each other.

[0024] In this embodiment, under conditions such as high temperature and vibration, the inner wall size of the cylinder undergoes slight changes. At this time, a compressive force is generated between the main sealing ring 101 and the auxiliary sealing ring 201. Part of the compressive force pushes the extrusion groove 202 to extend to both sides with the help of the extrusion inclined surface 102, thereby increasing the sealing performance between the auxiliary sealing ring 201 and the piston groove and improving the sealing effect of the device.

[0025] The main sealing ring 101 is made of tungsten carbide, and the auxiliary sealing ring 201 is made of nitrile rubber.

[0026] Tungsten steel has high hardness and strong wear resistance, making it suitable for high-pressure and high-speed operating environments; nitrile rubber is suitable for sealing oils, fuels and other liquids, and has strong oil resistance.

[0027] The interior of the extrusion slope 102 is provided with several expansion grooves 103, and a connecting rod 104 is provided inside the expansion groove 103. The connecting rod 104 and the auxiliary sealing ring 201 are fixed together.

[0028] In this embodiment, when the extrusion slope 102 pushes the extrusion groove 202 to extend to both sides, the connecting rod 104 will continuously pull the auxiliary sealing ring 201 to maintain the connection between the main sealing ring 101 and the auxiliary sealing ring 201, and adapt to the different expansion coefficients between the main sealing ring 101 and the auxiliary sealing ring 201 through the expansion groove 103.

[0029] A limiting groove 105 is formed on the surface of the extrusion slope 102, and a limiting rod 203 is fixedly connected inside the extrusion groove 202. The limiting groove 105 and the limiting rod 203 are compatible and slidably connected.

[0030] In this embodiment, in order to prevent the relative movement between the main sealing ring 101 and the auxiliary sealing ring 201 from causing displacement, the device is limited by the limiting groove 105 and the limiting rod 203, thereby preventing displacement and improving the stability of the device.

[0031] The outer wall of the auxiliary sealing ring 201 is provided with a connecting slope 204. A scraper ring assembly 3 is provided around the connecting slope 204. The scraper ring assembly 3 includes an oil scraper ring 301. The oil scraper ring 301 is fixed to the connecting slope 204. The inner wall of the oil scraper ring 301 is provided with a connecting groove 302. The connecting groove 302 is adapted to the connecting slope 204.

[0032] In this embodiment, the oil scraper ring 301 is used to remove excess lubricating oil from the piston surface to prevent contamination or incomplete combustion caused by oil-gas mixing.

[0033] The oil scraper ring 301 is made of polytetrafluoroethylene.

[0034] Polytetrafluoroethylene (PTFE) is resistant to high temperatures and corrosion, and has good self-lubricating properties, making it suitable for oil scraper rings.

[0035] Working principle:

[0036] First, the main sealing ring 101 is located between the piston and the cylinder wall and is responsible for the most important sealing work to prevent gas leakage.

[0037] Next, the auxiliary sealing ring 201 is located outside the main sealing ring to serve as a supplementary seal, enhance sealing performance, and reduce air leakage.

[0038] Then, the oil scraper ring 301 is used to remove excess lubricating oil from the piston surface to prevent contamination or incomplete combustion caused by oil-air mixing;

[0039] Finally, as shown in announcement number CN201092898Y, the installation work between this device and the piston groove is completed.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A leak-proof combination piston ring characterized by: The utility model provides a sealing ring, including primary ring assembly (1), primary ring assembly (1) includes main sealing ring (101), the outer wall of main sealing ring (101) is equipped with extrusion slope (102), and the periphery of extrusion slope (102) is provided with auxiliary ring assembly (2), auxiliary ring assembly (2) includes auxiliary sealing ring (201), auxiliary sealing ring (201) is arranged in the periphery of extrusion slope (102), and the inner wall of auxiliary sealing ring (201) is equipped with extrusion groove (202), and extrusion slope (102), extrusion groove (202) are matched.

2. A leakage-proof combined piston ring according to claim 1, characterized in that: The material of the main sealing ring (101) is tungsten steel, and the material of the auxiliary sealing ring (201) is butyronitrile rubber.

3. A leakage-proof combined piston ring according to claim 1, characterized in that: The inside of the extrusion slope (102) is provided with a plurality of expansion grooves (103), and the inside of the expansion groove (103) is provided with a connecting rod (104), and the connecting rod (104) and the auxiliary sealing ring (201) are fixed.

4. A leakage-proof combined piston ring according to claim 1, characterized in that: The surface of the extrusion slope (102) is provided with a limiting groove (105), and the inside of the extrusion groove (202) is fixedly connected with a limiting rod (203), and the limiting groove (105) and the limiting rod (203) are matched and slidably connected.

5. A leakage-proof combined piston ring according to claim 1, characterized in that: The outer wall of the auxiliary sealing ring (201) is provided with a connecting slope (204), and the periphery of the connecting slope (204) is provided with a scraping ring assembly (3).

6. A leakage-proof combined piston ring according to claim 5, characterized in that: The scraping ring assembly (3) includes an oil scraping ring (301), and the oil scraping ring (301) and the connecting slope (204) are fixed. The inner wall of the oil scraping ring (301) is provided with a connecting groove (302), and the connecting groove (302) and the connecting slope (204) are matched.

7. A leakage-proof combined piston ring according to claim 6, characterized in that: The material of the oil scraping ring (301) is polytetrafluoroethylene.

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