摘要
为探究无油压缩机气缸与填充PTFE活塞环的配对摩擦磨损特性,在Rtec-instruments多功能摩擦磨损试验机上对不同表面处理工艺的不锈钢、铝合金气缸材料与不同配方填充PTFE活塞环材料进行配对摩擦磨损试验。通过对摩擦系数时序曲线的变化规律、摩擦副磨损前后表面形貌特征及填充PTFE磨损量的研究,选择最优摩擦学性能的气缸-活塞环的配对摩擦副。结果表明,铝合金与不锈钢表面进行PCVD处理相对于常规阳极氧化和镀铬更易在摩擦表面形成自润滑转移膜;PTFE填充碳纤维时,其摩擦系数时序曲线随磨合过程降低且较为稳定;考虑摩擦系数与相对磨损量,提出了综合摩擦系数作为配对摩擦副选材的依据;PCVD处理的铝合金材料与填充主材碳纤维PTFE的综合摩擦系数为6.1×10^(-5),具有较低的综合摩擦系数、稳定的摩擦系数时序曲线和良好的表面形貌特征,可作为气缸-活塞环的配对摩擦副的优选方案之一。
In order to explore the friction and wear characteristics between cylinder and filled PTFE piston rings of oil-free compressor,the stainless steel and aluminum alloy cylinder materials with different surface treatments and filled PTFE piston ring materials with different formulations were paired and were tested on a Rtec-instruments multi-functional friction and wear testing machine.By studying the changing tendency of the friction coefficient time sequence curve,the surface topography characteristics of the friction pair before and after wear,and the wear amount of the filled PTFE,the friction pair of the cylinder-piston ring with the optimal tribological performance was selected.The results show that the PCVD treatment on the surface of aluminum alloy and stainless steel was more likely to form a self-lubricating transfer film on the friction surface than conventional anodized and chrome plated surface;when PTFE is filled with carbon fibers,the friction coefficient time sequence curve decreases with the running-in process and is relatively stable;considering the friction coefficient and the relative wear amount,the comprehensive friction coefficient was proposed as the basis for the design and selection of the friction pair of the oil-free compressor;The comprehensive friction coefficient between PCVD-treated aluminum alloy and PTFE filled with carbon fibers is 6.1×10^(-5),which has low comprehensive friction coefficient,stable friction coefficient time sequence curve and good surface topography.It can be used as one of the optimal schemes for the matching friction pairs of cylinder and piston ring.
作者
鲍军
曹斌
李奉誉
方燚
刘志龙
BAO Jun;CAO Bin;LI Fengyu;FANG Yi;LIU Zhilong(State Key Laboratory of Compressor Technology,Hefei General Machinery Institute,Hefei 230031,China)
出处
《流体机械》
CSCD
北大核心
2023年第6期1-5,38,共6页
Fluid Machinery
基金
安徽省重点研究与开发计划项目(202004a05020006)。
关键词
无油压缩机
摩擦磨损
活塞环
表面形貌
综合摩擦系数
oil-free compressor
friction wear
piston ring
surface topography
comprehensive friction coefficient
