轴向柱塞泵回程装置对滑靴动态特性的影响研究

考虑了滑靴的倾斜以及滑靴底面的弹流润滑效应，同时引入了滑靴与不同回程装置间的相互作用，对轴向柱塞泵滑靴副润滑油膜的动态规律进行了数学建模，研究不同回程装置对滑靴动态油膜特性的影响。实现滑靴动力学特性与摩擦特性的耦合求解，获得了缸体转动周期内滑靴润滑油膜的变化规律，探讨了中心弹簧回程机构以及固定间隙回程机构对滑靴动态油膜特性的影响。分析结果表明:高速运转下，滑靴在低压区会发生严重倾斜。采用中心弹簧回复装置在减缓滑靴倾斜程度时会减小滑靴在高低压区的工作膜厚。使用固定间隙回程机构不仅不影响滑靴在高压工作区的膜厚状态，还可以提高滑靴低压工作区的最小膜厚，因而显著改善滑靴倾斜程度。 

Effects of Hold Down Device on the Slipper's Dynamic Characteristics

The effects of hold down device on the slipper''s dynamic film was presented. Considering slipper''s tilt and pressure-elasticity effect of slipper''s lubrication surface, introducing the interaction between slipper and different hold-down device and according to the external forces and moments on slipper, the dynamic equations to describe micro-movement of slipper were established. Variation laws of the slipper''s film thickness within a complete rotating period of the barrel were obtained by solving the kinetic equation and lubrication governing equation simultaneously. The different hold-down device''s effect on slipper''s dynamic characteristics was discussed. The results show that oil-film thickness decreases if the hold down device with central spring is used to alleviate the slipper''s tilt. Hold down device with fixed clearance doesn''t influence the oil-film''s thickness during the delivery region and slipper''s minimum film can be increased at suction region. Therefore the effect to alleviate the slipper''s tilt is remarkable.