阅读说明：本技术 一种带有平行凹坑织构的内燃机活塞环 (Internal combustion engine piston ring with parallel pit texture ) 是由 马旋 孟祥旭 卢熙群 李彤阳 焦博文 孙文 王永强 于 2020-05-07 设计创作，主要内容包括：本发明一种带有平行凹坑织构的内燃机活塞环,包括活塞环本体,所述活塞环本体具有上、下环岸和内、外周面,且上、下环岸设有倒角,所述活塞环本体外周面上开设有两列正方形凹坑织构,所述两列正方形凹坑织构沿所述活塞环本体厚度方向的中面对称,凹坑序列Ⅰ和凹坑序列Ⅱ与所述活塞环本体外周面边缘平行,所述凹坑序列Ⅰ、凹坑序列Ⅱ沿周向等距分布,间距L在2～5mm之间,数量在20～50之间；本发明通过在活塞环外周面加工平行正方形凹坑织构,能够储存一部分润滑油,增大油膜承载力,减小粘性摩擦力和端泄,表面织构的存在一定程度上降低了微凸体密度,从而降低接触摩擦力,提高机械效率,对指导活塞环摩擦副的低摩擦设计具有重要意义。(The invention relates to an internal combustion engine piston ring with parallel pit textures, which comprises a piston ring body, wherein the piston ring body is provided with an upper ring bank, a lower ring bank, an inner peripheral surface and an outer peripheral surface, chamfers are arranged on the upper ring bank and the lower ring bank, two rows of square pit textures are arranged on the outer peripheral surface of the piston ring body, the two rows of square pit textures are symmetrical along the middle plane of the thickness direction of the piston ring body, a pit sequence I and a pit sequence II are parallel to the edge of the outer peripheral surface of the piston ring body, the pit sequence I and the pit sequence II are equidistantly distributed along the circumferential direction, the distance L is 2-5 mm, and the number; according to the invention, the parallel square pit texture is 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 increased, the viscous friction force and end leakage are reduced, and the density of the micro-convex body is reduced to a certain extent due to the surface texture, so that the contact friction force is reduced, the mechanical efficiency is improved, and the parallel square pit texture has important significance for guiding the low friction design of a piston ring friction pair.)

1. The internal combustion engine piston ring with the parallel pit textures is characterized by comprising a piston ring body (1), wherein the piston ring body (1) is provided with an upper ring land, a lower ring land, an inner peripheral surface and an outer peripheral surface, chamfers (4) are arranged on the upper ring land and the lower ring land and used for reducing the contact area of a piston ring and a cylinder sleeve, two lines of square pit textures are arranged on the outer peripheral surface of the piston ring body (1), the two lines of square pit textures are symmetrical along the middle plane of the piston ring body (1) in the thickness direction, and a pit sequence I (2) and a pit sequence II (3) are parallel to the edge of the outer peripheral surface of the piston ring body.

2. The piston ring with the parallel pit texture for the internal combustion engine as claimed in claim 1, wherein the pit trains I (2) and II (3) are equally distributed along the circumferential direction, the distance L is 2-5 mm, and the number is 20-50.

3. The piston ring with parallel pit texture for internal combustion engine as claimed in claim 1 or 2, wherein the length of pit sequence I (2) from the edge of the outer circumferential surface of the piston ring body (1) is L_TThe width of the piston ring body (1) is W and L_TThe ratio of/W represents the position of the groove, the pit sequence I (2) L_TThe range of/W is 0.2 to 0.8.

4. The piston ring with parallel pits for internal combustion engine as claimed in claim 1 or 2, wherein the width of pit train i (2) and pit train ii (3) is 0.05-0.20 mm and the depth is 0.3-3 μm.

5. The piston ring with parallel pit texture for internal combustion engine as claimed in claim 3, wherein said pit series I (2) and pit series II (3) have a width of 0.05-0.20 mm and a depth of 0.3-3 μm.

Technical Field

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

Background

The internal combustion engine has the advantages of high working efficiency, strong reliability, good economy and the like, and is widely applied to the fields of traffic, national defense, agriculture and fishery and the like. Currently, the market puts higher demands on the performance of the internal combustion engine, and high strengthening technology is derived. With the continuous improvement of the strengthening index of the internal combustion engine, especially the rotation speed, the explosion pressure and the energy density borne by a structural member of the internal combustion engine are greatly improved, the internal combustion engine has tribology problems of obviously increased friction power consumption, aggravated abrasion, serious cylinder pulling tendency and the like, and the problem becomes a bottleneck problem restricting the development of new advanced power in China.

The piston ring-cylinder sleeve friction pair is one of key friction pairs of an internal combustion engine, is an important part influencing the economical efficiency, the dynamic property and the reliability of the internal combustion engine, and the performance of the internal combustion engine is directly influenced by the performance of the working performance of the internal combustion engine. In recent years, with the development of internal combustion engines toward high rotation speed and high load, the working environment of piston rings in cylinders is increasingly severe, and the performance requirements of piston rings are also increasingly severe. The research shows that: the piston ring-cylinder sleeve friction pair of the internal combustion engine is the main part of friction power loss of the internal combustion engine, and when the piston ring-cylinder sleeve is seriously worn, high-temperature and high-pressure gas in the cylinder can be caused to flow downwards, and even a serious person can cause accidents such as crankcase explosion and the like. During the compression, combustion and expansion processes, the cylinder sleeve and the piston ring are subjected to various friction states such as hydrodynamic lubrication, mixed lubrication, boundary lubrication, dry friction and the like under high mechanical load and high thermal load, and are typical representatives of the friction wear problem in each friction pair of the internal combustion engine, and the problems are more prominent after the strengthening coefficient of the internal combustion engine is improved. Therefore, the reasonable structural design is needed to enhance the wear resistance and the lubricating property of the piston ring, prolong the service life and the reliability of the piston ring-cylinder sleeve, and have great significance for improving the overall working performance, the reliability and the economical efficiency of the internal combustion engine.

Disclosure of Invention

The invention aims to solve the tribological problem of a piston ring friction pair to a certain extent. Therefore, the invention provides the internal combustion engine piston ring friction pair with the parallel pit texture, which has the advantages of good lubricating effect, small mechanical loss and high volume efficiency under the working conditions of high speed and heavy load in an oil lubricating environment. The invention is based on the fluid dynamic pressure principle, and parallel pit textures are processed on the surface of a piston ring of an internal combustion engine.

The invention is realized by the following steps:

the internal combustion engine piston ring with the parallel pit textures is characterized by comprising a piston ring body, wherein the piston ring body is provided with an upper ring bank, a lower ring bank, an inner peripheral face and an outer peripheral face, chamfers are arranged on the upper ring bank and the lower ring bank and are used for reducing the contact area of a piston ring and a cylinder sleeve, two lines of square pit textures are arranged on the outer peripheral face of the piston ring body, the two lines of square pit textures are symmetrical along the middle plane of the piston ring body in the thickness direction, and a pit sequence I and a pit sequence II are parallel to the edge of the outer peripheral face of.

The invention also includes such features:

the pit sequences I and the pit sequences II are distributed at equal intervals along the circumferential direction, the distance L is 2-5 mm, and the number is 20-50;

the length of the pit sequence I from the edge of the outer peripheral surface of the piston ring body is L_TThe width of the piston ring body is W and L_TThe ratio/W represents the position of the groove, the pit sequence IL_TThe range of/W is 0.2-0.8;

the width of the pit sequence I and the pit sequence II is 0.05-0.20 mm, and the depth of the pit sequence I and the pit sequence II is 0.3-3 mu m.

The invention has the beneficial effects that:

according to the fluid dynamic pressure principle, the surface of the piston ring is designed into a surface with a parallel pit texture, and the knowledge of fluid mechanics shows that the dynamic pressure generated by a step plane is stronger than planes in other shapes; under the action of the step effect, the anti-overturning moment generated by an oil film pressure field can be better ensured, and the working reliability of the piston ring is enhanced. In addition, the pits can store a part of lubricating oil, the oil film bearing capacity is increased, the viscous friction force and end leakage are reduced, and the density of the micro-convex bodies is reduced to a certain extent due to the existence of the surface texture, so that the contact friction force is reduced, the mechanical efficiency is improved, and the method has important significance for guiding the low-friction design of the piston ring friction pair.

The invention improves the lubricating property of the piston ring friction pair only through the structural design without adding parts, and has the advantages of simple structure and good economical efficiency. In addition, the structure also has the characteristic of wide applicability, and parallel pit textures with different distributions and sizes can be selected according to different working conditions, so that the piston ring is ensured to have excellent working performance.

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 view showing an assembled state of the present invention

Detailed Description

The present invention will be described in detail with reference to specific embodiments.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and are not intended to be limiting.

The embodiment provides an internal combustion engine piston ring with parallel pit textures, which comprises a piston ring body 1, wherein the piston ring body is provided with an upper ring bank, a lower ring bank, an inner peripheral surface and an outer peripheral surface, chamfers 4 are arranged on the upper ring bank and the lower ring bank and used for reducing the contact area of a piston ring and a cylinder sleeve, two lines of square pit textures are arranged on the outer peripheral surface of the piston ring body 1, the two lines of square pit textures are symmetrical along the middle plane of the piston ring body in the thickness direction, and a pit sequence I2 and a pit sequence II 3 are parallel to the edge of the outer peripheral surface of the piston.

The pit sequences I2 and the pit sequences II 3 are distributed at equal intervals along the circumferential direction, the distance L is 2-5 mm, and the number is 20-50;

the pit sequence I2L_TThe range of/W is 0.2 to 0.8.

The pit sequence I (2) and the pit sequence II (3) have the width of 0.05-0.20 mm and the depth of 0.3-3 mu m.

Fig. 3 is a view of an assembled partial state of the present invention. The piston ring body 1 is arranged in a piston ring groove 6 in the using process, meanwhile, a friction matching pair is formed between the outer peripheral surface of the piston ring body 1 and the inner peripheral surface of a cylinder sleeve 7, in the working process, the piston ring body 1 and a piston 5 do reciprocating motion along the cylinder sleeve 7 in the piston ring groove 6, and parallel pit textures are processed on the outer peripheral surface of the piston ring body 1, so that the oil film bearing capacity can be improved, the mechanical loss is reduced, the leakage is reduced, and the lubricating state is improved.

The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In summary, the following steps: the invention relates to a piston ring with parallel pit textures for an internal combustion engine, which comprises a piston ring body, wherein the piston ring body is provided with an upper ring land, a lower ring land, an inner peripheral surface and an outer peripheral surface, chamfers are arranged on the upper ring land and the lower ring land and are used for reducing the contact area of a piston ring and a cylinder sleeve, two rows of square pit textures are arranged on the outer peripheral surface of the piston ring body, the two rows of square pit textures are symmetrical along the middle plane of the thickness direction of the piston ring body, and a pit sequence I and a pit sequence II are parallel to the edge of. According to the invention, the parallel square pit texture is 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 increased, the viscous friction force and end leakage are reduced, and the density of the micro-convex body is reduced to a certain extent due to the surface texture, so that the contact friction force is reduced, the mechanical efficiency is improved, and the parallel square pit texture has important significance for guiding the low friction design of a piston ring friction pair.