CN214384179U

CN214384179U - Internal combustion engine piston ring with textured surface wear-resistant coating

Info

Publication number: CN214384179U
Application number: CN202023038745.7U
Authority: CN
Inventors: 赵健; 马文林; 张裕; 李智勇; 王勋宗; 陈亚刚
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-10-12
Anticipated expiration: 2030-12-14

Abstract

The invention discloses a surface wear-resistant coating textured internal combustion engine piston ring. Comprises a piston ring body, a wear-resistant coating and a surface texture. The outer peripheral surface of the piston ring body is coated with a wear-resistant coating, and the surface of the wear-resistant coating is provided with a surface texture. The surface texture is circular pits and is uniformly distributed along the surface of the coating. According to the invention, the wear-resistant coating and the surface texture are processed on the outer peripheral surface of the piston ring, so that a part of lubricating oil can be stored, the oil film bearing capacity is improved, the wear resistance of the piston ring and the lubricating and antifriction performance of a friction pair are improved, the mechanical efficiency and the working performance of the piston are greatly improved, and the service life of an engine is prolonged.

Description

Internal combustion engine piston ring with textured surface wear-resistant coating

Technical Field

The invention relates to a piston ring, in particular to a piston ring of an internal combustion engine, and belongs to the field of engineering machinery.

Background

The piston ring-cylinder sleeve structure is an important component of a crank connecting rod mechanism of an internal combustion engine and is a typical friction pair structure. The performance of the friction pair directly influences the use efficiency, the use performance, the service life and the like of the internal combustion engine. The research shows that: the energy consumed by the internal combustion engine to overcome the frictional resistance during the operation accounts for 48 percent of the energy generated by the combustion of the fuel, wherein the energy consumed by the frictional resistance of the piston ring-cylinder sleeve sliding pair accounts for 19 percent of the total frictional energy consumed by the internal combustion engine.

The piston ring is an extremely important part of an internal combustion engine, the use condition of the piston ring is complex, the disassembly is extremely inconvenient during maintenance, and the piston ring is subjected to more severe use conditions, and in order to improve the reliability of the piston ring, the working surface of the piston ring needs to be strengthened to prolong the service life of the piston ring. With the explosion of the global energy crisis, the use efficiency of the internal combustion engine is improved, and the method has extremely important significance for improving the frictional wear performance of a piston ring-cylinder sleeve friction pair of the internal combustion engine.

Disclosure of Invention

The purpose of the invention is to reduce friction wear between piston ring and cylinder sleeve and prolong the service life of piston ring. Therefore, the characteristics of the coating resistance, the wear resistance of the piston ring, and the surface texture, the wear resistance of the friction pair are combined, the working performance is greatly improved, and the service life is greatly prolonged.

The invention is realized by the following steps:

a piston ring with a textured surface wear-resistant coating for an internal combustion engine. Comprises a piston ring body, a wear-resistant coating and a surface texture. The outer peripheral surface of the piston ring body is coated with a wear-resistant coating, and the surface of the coating is provided with surface textures.

In order to achieve the purpose, the wear-resistant coating is made of a TIN composite material and is sprayed on the outer peripheral surface of the piston ring body by a plasma spraying technology, and the spraying thickness is 0.2-0.5 mm.

The piston ring with the textured surface wear-resistant coating for the internal combustion engine is characterized in that the surface texture is machined on the surface of the wear-resistant coating by using a laser.

The surface texture is a circular pit, and the surface texture is uniformly distributed on the surface of the wear-resistant coating. The diameter of the surface texture is 50-150 μm, the area ratio of the surface texture is 10-20%, and the depth of the surface texture is 50-80 μm.

The invention has the beneficial effects that:

the wear-resistant coating is sprayed on the peripheral surface of the piston ring, so that abrasive dust and abrasive grains generated in the running process of the piston ring can be greatly reduced, and the frictional wear performance of the piston ring is greatly improved.

The surface texture is prepared on the surface of the wear-resistant coating, so that a lubricating medium, generated abrasive dust and abrasive particles can be stored, secondary wear is avoided, the hydrodynamic lubrication performance and the oil film bearing capacity can be improved through the surface texture, and the service life of a piston ring is prolonged.

Drawings

FIG. 1 is a partial perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a partially enlarged schematic view of the surface texture of the wear-resistant coating;

fig. 4 is a partial assembly view of the present invention.

In the figure: 1-a piston ring body; 2-wear resistant coating; 3-surface texture; 4-cylinder liner; 5-piston.

Detailed Description

In order to make the objects, technical means and advantages of the present invention more apparent, the present invention will be described in detail with reference to specific embodiments. The specific examples described herein are intended to be illustrative of the invention only and are not intended to be limiting.

As shown in fig. 1, 2 and 3, the internal combustion engine piston ring with the textured surface wear-resistant coating is characterized by comprising a piston ring body 1, wherein the piston ring body 1 is provided with an inner peripheral surface and an outer peripheral surface, the outer peripheral surface of the piston ring body is coated with the wear-resistant coating 2, and the wear-resistant coating 2 is provided with the surface texture 3.

The wear-resistant coating 2 is made of a TIN composite material and is sprayed on the outer peripheral surface of the piston ring body 1 by using a plasma spraying technology, and the spraying thickness is 0.5 mm.

The surface texture 3 is a circular pit, and the surface texture 3 is uniformly distributed on the surface of the wear-resistant coating 2.

The diameter of the surface texture 3 is 150 μm, the area ratio of the surface texture 3 is 16%, and the depth of the surface texture 3 is 50 μm.

Fig. 4 is a partial assembly view of the present invention. In the using process, the piston ring body 1 is arranged on the piston 5 and forms a piston ring-cylinder sleeve friction pair with the cylinder sleeve 4. During operation, the piston ring body 1 reciprocates along the cylinder liner 4. The wear-resistant coating 2 can greatly reduce abrasive dust and abrasive particles generated in the running process of the piston ring body 1, so that the frictional wear performance of the piston ring is greatly improved.

The surface texture 3 is prepared on the wear-resistant coating 2, so that a lubricating medium, generated abrasive dust and generated abrasive particles can be stored, secondary wear is avoided, the hydrodynamic lubrication performance and the oil film bearing capacity can be improved through the surface texture 3, and the service life of a piston ring is prolonged.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. The internal combustion engine piston ring with the textured surface wear-resistant coating is characterized by comprising a piston ring body (1), wherein the piston ring body (1) is provided with an inner peripheral surface and an outer peripheral surface, the outer peripheral surface of the piston ring body (1) is coated with a wear-resistant coating (2), and the surface of the wear-resistant coating (2) is provided with a surface texture (3).

2. The internal combustion engine piston ring with the textured surface wear-resistant coating as claimed in claim 1, wherein the wear-resistant coating (2) is a TIN composite material and is sprayed on the outer circumferential surface of the piston ring body (1) by a plasma spraying technology, and the spraying thickness is 0.2-0.5 mm.

3. The piston ring for an internal combustion engine with a textured surface wear-resistant coating as claimed in claim 1, characterized in that the surface texture (3) is machined on the surface of the wear-resistant coating (2) by means of a laser.

4. The piston ring of an internal combustion engine with the textured surface wear-resistant coating as claimed in claim 1, wherein the surface texture (3) is circular pits, and the surface texture (3) is uniformly distributed on the surface of the wear-resistant coating (2).

5. The piston ring for an internal combustion engine with a textured surface wear-resistant coating according to claim 1, wherein the diameter of the surface texture (3) is 50 μm to 150 μm, the area ratio of the surface texture (3) is 10% to 20%, and the depth of the surface texture (3) is 50 μm to 80 μm.