水压元件柱塞摩擦副的抗卡紧研究  

Research on the Anti-chucking of the Water Hydraulic Component Piston Friction Pairs

作　　者：刘桓龙[1] 王国志[1] 徐著华 柯坚[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]四川海洋特种技术研究所,四川成都600000

出　　处：《润滑与密封》2006年第9期58-61,共4页Lubrication Engineering

基　　金：国家863计划青年基金项目(2004AA616240);西南交通大学校基金项目(2005A09)

摘　　要：针对水润滑普通间隙密封柱塞副在工作过程中出现的卡紧现象,提出了基于静压支撑的双阻尼效应柱塞副,并对其抗卡紧特性和流量特性进行了分析。结果表明:水的流动惯性和表面粗糙度的共同作用使得间隙摩擦副流场内可能产生局部紊流或整体紊流,计算时不能采用层流模型,需考虑惯性和表面粗糙度效应;提出的双阻尼效应柱塞副具有一定的抗卡紧能力,能实现柱塞的自动对中和平衡,防止卡紧,减小启动摩擦力;双阻尼效应柱塞副比同等密封长度的普通柱塞副的泄漏流量更小。Aimed at the chucking phenomena happened when the common water hydraulic piston friction pairs work, the double damping effect piston friction pairs based on the hydraulic supporting principle were presented and the anti-chucking and flow rate characteristics were analyzed. The results indicate that the co-operation between the flowing inertia and surface roughness makes that the local turbulence or the whole one possibly happens in the flow field of the clearance friction pairs, so the laminar flow model can＇ t be used and the inertia and surface roughness effect should be considered ;the presented double damping effect piston friction pairs have certain anti-chucking ability and the piston can center and balance automatically in the piston hole preventing chucking and decreasing the starting-up fiction force;the leakage flow rate of the double damping effect piston friction pairs is smaller than that of the common one with the same sealing length.

关 键 词：水压元件 柱塞摩擦副 双阻尼效应 卡紧 泄漏 

分 类 号：TH117[机械工程—机械设计及理论]