流体润滑状态下磨粒尺寸对液压泵磨损的影响

本文研究了流体润滑状态下磨粒尺寸对液压泵磨损的影响。结果表明,在液压系统中,泵的磨损主要决定于磨粒与泵内关键运动副动态间隙之间的尺寸关系:尺寸小于动态间隙的磨粒影响很小;尺寸明显比动态间隙大的磨粒不会对泵产生磨损作用;尺寸与动态间隙很接近的磨粒能使泵发生严重磨损。作者还利用扫描电子显微镜对流体润滑状态下三体磨粒磨损中的磨屑形貌进行了观察与分析,并且提出了控制液压系统中磨粒损磨的可行施措。

The Effect of Particle Size on the Wear of Hydraulic Pumps under Liquid Lubrication Condition

In this paper the effect of particle size on the wear of hydraulic pumps was investigated. The test results show that the wear of the pump in a hydraulic system mainly depends on the relation between the size of abrasive particles and the dynamic clearance dimension of the key moving parts.The particles smaller than the dynamic clearance produce mild wear.The particles larger than the dynamic clearance do not produce wear. The particles near to the dynamic clearance dimension generate severe wear.The dynamic clearance dimension of the key moving parts in the pump can be used as a parameter to evaluate t he pump cont a-minant sensitivity and to determine the filter rating of the system. The formation mechanism of the wear debris of three body abrasive wear under liquid lubrication condition was analysed by means of a scanning electron microscope.To protect hydraulic pumps from abrasive wear, the system filter should be capable of removing particles near to the dynamic clearance dimension of the kev moving parts.