滑靴副润滑油膜成膜特性的理论与试验研究

Theoretical and Experimental Research on the Formation of Lubrication Film for Slipper Bearings of Axial Piston Pumps

为使滑靴副具有良好的摩擦性能,应使滑靴副处于全膜润滑状态.通过耦合流体动力润滑方程、膜厚方程、任一点速度方程、流量平衡方程以及滑靴所受的力和力矩平衡方程,建立了滑靴的摩擦动力学模型,设计了滑靴副模型试验装置,仿真分析与试验研究了工作转速与压力对滑靴副油膜特性(中心膜厚、最小膜厚以及倾斜方位角)的影响.仿真与试验结果表明,滑靴副的油膜厚度随工作转速的升高而增大,但增大趋势逐渐变缓;滑靴副油膜厚度随工作压力的升高而减小;低速高压下,滑靴副易处于混合润滑状态.

In order to improve the friction properties,the slipper bearings need to operate in the condition of full film lubrication.A friction dynamic model of slipper bearing was presented by coupling the hydrodynamic lubrication equation,oil film thickness equation,velocity equation of arbitrary point,flow quantity balance equations,force and moment equilibrium equations.An experiment modelling the slipper bearing device was designed and tested to provide experimental study.The two methods developed were used to investigate influences of rotating speed and pressure on the characteristics of the film including central film thickness,minimum film thickness and tilt directional angle.Both of the simulation results and test results show that,the film thickness increases with the rotating speed,but the increasing tendency turns smooth,at the same time,the film thickness decreases as the pressure increase.The slipper bearing often operates in the state of mixing lubrication at low rotating speed and high pressure condition.