润滑薄油膜承载力的测量  

Measurement of Load-carrying Capacity of Thin Lubricating Films

作　　者：李霞[1] 郭峰[1] 杨淑燕[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《摩擦学学报》2012年第2期139-143,共5页Tribology

基　　金：国家自然科学基金(50875136);教育部博士点基金(20093721110001)资助~~

摘　　要：利用面接触润滑油膜测量系统研究了固定倾角滑块轴承承载力问题.在滑块倾角和载荷固定不变的条件下测得油膜厚度与速度的关系,经过参数转换,得到无量纲承载量曲线.这不同于传统方法中在不同收敛比下对油膜压力的直接测量.结果表明:在薄油膜条件下实际承载量曲线和理论曲线表现了相同的变化趋势;实测值小于理论值;理论认为无量纲承载量唯一由收敛比决定,而实验结果表明无量纲承载量曲线受滑块倾角、载荷和润滑油性质的影响.The load - carrying capacity of a fixed - inclined slider bearing has been evaluated by film thickness measurement using an oil film thickness tester in conform contacts. In the measurement, under fixed inclination and load, film thickness values at different speeds are obtained, and the curve of load - carrying capacity is derived by a dimensionless parameter group. This approach is quite different from the previous methods whereby the pressure of oil film is measured under different convergence ratios and the load can be obtained by integration. The measured load - carrying capacity curve and the theoretical analysis show the same tendency, and however the measured value is lower than the theoretical value. The theory holds that the load -carrying capacity is determined only by the convergence ratio. However, the experimental results show the dimensionless load - carrying capacity is affected by the inclination angle of the slider, load and the properties of lubricating oils.

关 键 词：流体动压效应 承载量 收敛比 面接触 

分 类 号：TH117[机械工程—机械设计及理论]