Influence of Surface Textured Piston Ring on Tribological Performance of Cylinder Liner-Piston Ring
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摘要: 为了改善缸套-活塞环的摩擦性能，通过激光刻蚀技术在活塞环工作面加工出不同形状的表面织构。在同一转速、不同载荷下通过微机控制的往复式摩擦磨损试验机研究不同表面织构活塞环对缸套-活塞环摩擦学性能的影响。试验结果表明：在载荷为400 N工况下，活塞环的椭圆、圆形、方形织构摩擦系数分别可以降低1.1%、18.3%、14.1%；载荷600 N工况下，3种织构分别可以降低35.3%、35.3%、19.1%；综合分析摩擦系数、表面形貌、接触电阻，圆形凹坑织构的活塞环在降低摩擦系数、提高油膜润滑状态等方面效果最优。Abstract: In order to improve the friction performance of cylinder liner piston ring, the surface textures of different shapes were machined through laser etching technology. Under the same rotational speed and different applied loads, the influence of the piston rings with different surface textures on the tribological performance of cylinder liner-piston ring was studied with a computer-controlled reciprocating friction and wear tester. The experimental results show that the friction coefficients of elliptical, circular and square textures of piston rings reduced by 1.1%, 18.3% and 14.1% respectively at a load of 400 N, and 35.3%, 35.3% and 19.1% at a load of 600 N respectively. Through the comprehensive analysis of friction coefficient, surface topography and contact resistance, the piston ring of circular pit texture has the best performance in reducing the friction coefficient and wear and improving the lubrication condition of oil film.
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Key words:
- piston ring /
- surface texture /
- friction /
- oil film thickness
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表 3 活塞环表面织构的设计参数
活塞环织构形状 打标次数 表面占有率/% 参数名称 数值/mm 椭圆 20 13.7 半长轴a
半短轴b10.5 圆形 20 13.7 半径r 0.5 方形 20 13.7 边长a 1.253 
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表 4 试验后表面参数平均值
活塞环织构形状 载荷/N Sq/μm Sds(个峰·mm-2) Svi 原始 200
400
6002.29
3.60
2.34249.33
167.575
234.282.80
1.52
2.00椭圆 200
400
6002.43
2.40
1.95279.02
278.80
278.612.53
2.71
2.28圆形 200
400
6002.32
2.37
1.17271.70
285.91
274.953.84
2.53
2.71方形 200
400
6001.24
3.58
2.02333.52
229.40
245.702.69
2.56
2.08
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