CN221169761U

CN221169761U - Piston ring

Info

Publication number: CN221169761U
Application number: CN202323262440.8U
Authority: CN
Inventors: 姚剑鸣; 李科志; 郑立铧; 黄治情; 蒋凯威
Original assignee: Qingyuan Wanlifeng Piston Ring Co ltd
Current assignee: Qingyuan Wanlifeng Piston Ring Co ltd
Priority date: 2023-12-01
Filing date: 2023-12-01
Publication date: 2024-06-18
Anticipated expiration: 2033-12-01

Abstract

The utility model relates to a piston ring, which belongs to the technical field of engines and comprises a ring body, wherein the ring body comprises an upper ladder surface and a lower ladder surface, the horizontal direction inclined angle of the upper ladder surface is 3-10 degrees larger than the horizontal direction inclined angle of the lower ladder surface, at least one groove for filling lubricant is arranged on the outer circle surface of the ring body, at least one bulge is arranged on the inner circle surface of the ring body, the bulge is used for increasing friction, and the angle difference between the upper ladder surface and the lower ladder surface is arranged, so that the downward channeling of gas in a combustion chamber can be effectively prevented in the up-down process of the ring body, the air leakage and the engine oil consumption of the engine are reduced, and the service lives of the ring body and a piston are greatly prolonged.

Description

Piston ring

Technical Field

The utility model belongs to the technical field of engines, and particularly relates to a piston ring.

Background

The ring body is one of key parts of internal combustion engine, and its working characteristics directly affect the performance of engine, and its main functions are sealing, heat-conducting, uniformly distributing lubricating oil and supporting piston. The ring body moves back and forth in the cylinder along with the piston, is one of the components with the worst working condition in the engine, and is characterized in that the working temperature is high, the ring body slides at high speed under high mechanical load, the ring body is subjected to strong abrasion, the performance improvement of the ring body is the key for the working performance of the engine, and the working surface of the ring body is plated with hard chromium, so that the surface hardness and the abrasion resistance can be improved, but the heat conduction of the ring body in the cylinder sleeve is slow, the ring body is easy to abrade, and the oil distribution is uneven.

The existing piston ring is large in abrasion in the using process after being installed, the service life is short, and the performance of an engine cannot be improved.

Disclosure of utility model

In order to solve the problems in the prior art, the utility model provides a piston ring, which solves the problems of larger abrasion and shorter service life in the use process of the existing piston ring.

The aim of the utility model can be achieved by the following technical scheme:

The piston ring comprises a ring body, wherein the ring body comprises an upper ladder surface and a lower ladder surface, the horizontal direction inclined angle of the upper ladder surface is 3-10 degrees larger than that of the lower ladder surface, at least one groove for filling lubricant is formed in the outer circle surface of the ring body, at least one protrusion is formed in the inner circle surface of the ring body, and the protrusion is used for increasing friction.

Preferably, the ring body is provided in an open structure, and the ring body is made of polyimide.

Preferably, an oxide film is arranged on the surface of the ring body.

Preferably, the surface of the ring body is provided with a chromium plating layer, the outer surface of the chromium plating layer is provided with a loose mesh, and the surface of the ring body is provided with chromium layer mesh grooves.

Preferably, the chromium layer reticulate pattern groove is inlaid with hard particles.

Preferably, the multi-element co-permeation compound layer with the thickness of 0.05-0.15 mm is fixedly arranged on the outer circular surface of the ring body.

The beneficial effects of the utility model are as follows:

1. By arranging the angle difference between the upper stair surface and the lower stair surface, the downward channeling of gas in the combustion chamber can be effectively prevented in the upward and downward running processes of the ring body, so that the air leakage and the engine oil consumption of the engine are reduced, and the service lives of the ring body and the piston are greatly prolonged.

2. The friction can be reduced, the sealing performance is improved, the alloy material with high strength and wear resistance has good mechanical property and fatigue resistance, and the service life and stability of the ring body can be ensured; the lubricant can be uniformly distributed on the surface of the ring body from the grooves, so that friction and abrasion are reduced, and the service life of the piston ring is prolonged.

Drawings

The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.

FIG. 1 is a schematic diagram of a piston ring in a front view according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a piston ring according to an embodiment of the present utility model;

FIG. 3 is a schematic side view of a piston ring according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a piston ring according to an embodiment of the present utility model;

Legend: 1. a ring body; 11. a step-up surface; 12. a lower stair surface; 2. a protrusion; 3. a groove; 4. an oxide layer; 5. a chromium plating layer; 51. a reticulate pattern groove; 6. a layer of a multi-component co-penetrating compound.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.

As shown in fig. 1 to 4, a piston ring comprises a ring body 1, wherein the ring body 1 comprises an upper ladder surface 11 and a lower ladder surface 12, the horizontal inclination angle of the upper ladder surface 11 is 3-10 degrees larger than the horizontal inclination angle of the lower ladder surface 12, the slope surface of the existing ring body 1 is a symmetrical ladder surface, the upper ladder angle and the lower ladder angle are symmetrically arranged, the tolerance generated by ladder angles in actual production is added, the radial vibration is received when the ring body 1 moves, the lower ladder surface 12 of the ring body 1 is in contact with a piston mounting groove rather than an intimate surface, but is in uncertain line contact, a pre-designed sealing effect cannot be realized, poor sealing of the lower ladder surface 12 is caused, air leakage and burning of an engine are caused, The oil channeling causes low energy utilization rate, potential safety hazards exist at the same time of waste, the piston makes reciprocating rectilinear motion in the engine, the ring body 1 mounted on the piston is contacted with the inner wall of the engine in the motion process, when the ring body 1 moves, the outer wall of the ring body 1 rubs with the inner wall of the engine, when the ring body 1 moves upwards, the outer wall of the ring body 1 is subjected to downward friction, when the ring body 1 moves downwards, the outer wall of the ring body 1 is subjected to upward friction, the ring body 1 is mounted in the piston, the inner side of the ring body 1 is limited by the mounting groove, the force applied to the outer side of the ring body 1 is larger than the force applied to the inner side of the ring body 1, so that the stress between the inner side and the outer side of the piston is unbalanced, the whole ring body 1 and the piston relatively move, the displacement of the outer side of the ring body 1 is larger than the displacement of the inner side of the ring body 1, and then the ring body 1 is changed into line contact from surface contact, so that the cutting amount of the upper ladder surface 11 of the ring body 1 is larger than that of the lower ladder surface 12 when the ring body 1 generates friction force with the movement of the inner wall of an engine, the actual positive torsion of the upper ladder surface 11 in the movement of the ring body 1 is formed, the angle difference can offset the stress difference between the outer side and the inner side of the ring body 1, the probability of the ring body 1 in line contact with a piston is reduced, the contact frequency of the ring body 1 and the piston surface is improved, the downward channeling of gas in a combustion chamber can be effectively prevented in the upward and downward processes of the ring body 1, the leakage amount and the engine oil consumption of the engine are reduced, the service life of the ring body 1 and the piston is greatly prolonged; due to positive torsion formed by the difference of the upper ladder angle and the lower ladder angle, when the ring body 1 moves up and down, the contact area and the pressure distribution of the upper ladder surface and the lower ladder surface can be changed; when the inclination angle of the upper stair surface 11 in the horizontal direction and the inclination angle of the lower stair surface 12 in the horizontal direction are smaller than 3 degrees, the power output of the engine can be influenced because the inclination angle of the upper stair surface and the lower stair surface of the ring body 1 are too small, the sealing performance between the ring body 1 and the cylinder wall is reduced mainly because the inclination angle of the upper stair surface 11 in the horizontal direction is larger than 10 degrees, the ring body 1 is possibly difficult to install, the ring body cannot be tightly attached to the cylinder wall, the reliability is reduced, the combustion efficiency of the engine is further influenced, the middle contact area and the pressure can be increased by properly increasing the inclination angle of the upper stair surface, the inclined angle of the lower stair surface is reduced, so that the contact area and pressure of the middle part can be reduced, the elastic force distribution of the ring body 1 can be optimized, the elastic force is more uniform, and the sealing performance and the fitting degree are improved; the ring body 1 is made of high-strength and wear-resistant alloy material, and the outer circumferential surface of the ring body 1 is provided with at least one groove 3 for accommodating lubricant; meanwhile, the inner circumferential surface of the ring body 1 is provided with at least one bulge 2, so that friction between the ring body 1 and a piston can be increased, sealing performance is improved, and the alloy material with high strength and wear resistance has good mechanical performance and fatigue resistance, and can ensure the service life and stability of the ring body 1; the lubricant can be uniformly distributed on the surface of the ring body 1 from the grooves 3, so that friction and abrasion are reduced; meanwhile, the contact area between the ring body 1 and the cylinder wall can be effectively reduced by the bulge 2, so that friction force is increased, and abrasion of the ring body 1 caused by large relative displacement of the ring body 1 and the piston ring in the moving process is avoided.

The ring body 1 is provided with an opening structure, and the opening can facilitate the installation and the disassembly of the piston ring. When the piston ring is installed, the piston ring can be easily sleeved on the piston through the opening, and is attached to the cylinder wall; the piston ring can be easily detached through the opening, and the opening can prevent the piston ring from being blocked on the cylinder wall. If the piston ring has no opening, when the piston ring is closely adhered to the cylinder wall, the piston ring may be blocked on the cylinder wall due to friction force, so that the normal operation of the piston ring is affected, and the opening can increase the elasticity and the adaptability of the piston ring; when the engine works, the piston ring can be worn by the cylinder wall, the opening can increase the elasticity and adaptability of the piston ring, so that the piston ring can better adapt to the shape and the size of the cylinder wall, the ring body 1 is made of polyimide, the polyimide has excellent high temperature resistance and can keep stable mechanical properties at high temperature, so that the piston ring can adapt to the engine working environment with high load and high rotating speed, the polyimide has excellent wear resistance and self-lubricating property, the friction and wear between the piston ring and the cylinder wall can be reduced, the efficiency and the service life of the engine are improved, meanwhile, the polyimide also has excellent chemical stability and corrosion resistance, the internal corrosion and the chemical corrosion of the engine can be resisted, and the shape and the dimensional stability of the piston ring are kept.

With the continuous improvement of the output power of the engine, the thermal stress and the mechanical stress born by the piston also correspondingly rise, so that the ring body 1 is cracked and ablated, the hard oxidized oxide film can effectively improve the heat resistance of the top surface of the aluminum piston, and has extremely good effect on inhibiting the heat cracking, in one embodiment, the surface of the ring body 1 is provided with the oxide layer 4, so that the inner circular side wall and the outer circular side wall of the ring body 1 are fully treated at the same time, the contact pressure distribution of the ring body 1 is improved, the problems of unbalanced residual stress caused by single-sided nitriding and carburizing of the outer circular side wall of the ring body 1 are avoided, the oxidation treatment of the ring body 1 can improve the precision of the ring body 1 and reduce the heat treatment rejection rate of the ring body 1, the oxide layer 4 can isolate high temperature, the protection piston cannot be affected by high temperature, the oxide layer 4 can improve the wear resistance and elasticity of the piston, and simultaneously can also insulate heat, prevent corrosion, improve the sealing performance of the ring body 1, reduce the friction resistance between the ring body 1 and the outer circular side wall, improve the performance of the engine and the performance and the fuel economy, so as to solve the cracking and ablation phenomena of the ring body 1.

The ring body 1 will generally rub with the engine, if the hardness of the ring body 1 is insufficient, in the long-term friction process, the ring body 1 is continuously rubbed and lost, resulting in the performance reduction of the engine, in an embodiment, the surface of the body of the ring body 1 is provided with a chromium plating layer 5, so that the hardness and the corrosion resistance of the ring body 1 can be enhanced, and the service life of the ring body is prolonged; in addition, the chrome plating layer 5 can also improve the wear resistance of the ring body 1, reduce heat and energy loss generated during friction and improve the efficiency and the power performance of the engine.

The reticulate pattern groove 51 is inlaid with hard particles, the hard particles are made of alumina, the melting point of the alumina is high, and the reticulate pattern groove is a ceramic material with good performance and has the characteristics of high hardness, high wear resistance, high corrosion resistance and the like. Ceramic particles such as alumina are inlaid on the surface of the ring body 1, so that the wear resistance and hardness of the ring body 1 can be remarkably improved, and meanwhile, the corrosion resistance of the ring body 1 can be enhanced, and the service life of the ring body is prolonged. In addition, ceramic particles such as alumina are inlaid, so that the sealing performance of the ring body 1 can be improved, the combustion efficiency and the emission performance of the engine are improved, and the efficiency and the power performance of the engine are improved.

The multi-element co-permeation compound layer 6 with the thickness of 0.05-0.15 mm is fixedly arranged on the outer circular surface of the ring body 1, so that the wear resistance and corrosion resistance of the ring body 1 are improved, and compared with the traditional hard chrome plating product, the engine oil consumption and emission of an engine provided with the ring body 1 are greatly reduced, and the environment-friendly multi-element co-permeation compound layer is beneficial to large-scale industrial production.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. The piston ring is characterized by comprising a ring body (1), wherein the ring body (1) comprises an upper ladder surface (11) and a lower ladder surface (12), the horizontal direction inclined angle of the upper ladder surface (11) is 3-10 degrees larger than that of the lower ladder surface (12), at least one groove (3) for filling lubricant is formed in the outer circular surface of the ring body (1), at least one protrusion (2) is arranged on the inner circular surface of the ring body (1), and the protrusion (2) is used for increasing friction.

2. A piston ring according to claim 1, wherein the ring body (1) is provided in an open structure, the ring body (1) being made of polyimide.

3. A piston ring according to claim 1, characterized in that the ring body (1) is provided with an oxide layer (4) on its surface.

4. A piston ring according to claim 1, characterized in that the surface of the ring body (1) is provided with a chrome coating (5), and the outer surface of the chrome coating (5) is provided with reticulate grooves (51).

5. A piston ring according to claim 4, characterized in that the reticulate grooves (51) are embedded with hard particles.

6. A piston ring according to claim 1, characterized in that the outer circumferential surface of the ring body (1) is fixedly provided with a layer (6) of a multicomponent co-penetrating compound having a thickness of 0.05-0.15 mm.