摘要
为探索混合型表面织构对缸套-活塞环摩擦副减摩性能的影响,考虑均匀面积率和变面积率两种密度形式,利用活动模板电解加工技术,在有机械珩磨条纹的缸套试件表面继续加工出具有不同直径及面积率参数的微凹坑织构组成混合织构,并与活塞环试件进行往复式摩擦试验。研究结果表明:相比仅有机械珩磨条纹的试件,具有适当参数的混合织构试件可以继续减小摩擦。其中,直径为300μm、面积率为5%的均匀密度混合织构试件,在试验条件下继续减小摩擦达17%;面积率组合为5%-15%-5%的变密度混合织构试件可进一步减小摩擦达26%。当微凹坑深度及载荷一定时,微凹坑直径对混合织构的减摩效果影响较大,微凹坑面积率次之。在一定条件下,适当组合的变密度织构比均匀密度织构的减摩效果更显著。
In order to study effect of mixed surface texture on friction reduction performance of piston ring-cylinder liner tribopair, the micro-pit array was regularly made on the cylinder inner wall having the honing stripes machined by electrochemical machining technology to achieve a mixed texture with different diameters and area coverage rate and dimple densities reciprocating friction tests were carried out on the cylinder liner-piston ring tribopair. The results show that the mixed texture surface specimen with appropriate parameters can better reduce friction compared to only mechanically honed specimen. In this test the even density mixed texture specimen with diameter 300μm and area eoverage rate 5 % can further reduce friction by 17%, and the specimen with variable density mixed texture of 5%-15%-5% reaches 26%. Under constant micro-pit depth and load conditions, the friction reduction effect of micro-pit diameter is more obviously than area coverage rate. In certain conditions, using variable density texture can decrease friction better than even density texture.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2014年第5期113-118,共6页
Chinese Internal Combustion Engine Engineering
基金
国家自然科学基金项目(U1134003
51175246)
南京航空航天大学基本科研业务费专项科研资助项目(NP2011028)
关键词
内燃机
缸套
混合织构
密度
减摩
往复运动
IC engine
cylinder liner
mixed texture
density
friction reduction reciprocation
