基于往复阀减振的轴向柱塞泵压力特性分析

Pressure Characteristics Analysis of Axial Piston Pump with Vibration Reduction of Reciprocating Valve

采用传统三角槽配流盘的轴向柱塞泵在过渡区不能完全消除由于换向产生的压力脉动,同时由于节流的影响,会产生明显的流量倒灌现象。在不对缸体或配流盘进行颠覆性设计的情况下,提出一种压力控制往复阀结构串联于各柱塞腔之间,从而缓冲过渡区的压力脉动,减小过渡区产生的振动,并取消配流盘的三角槽结构,从而减少流量倒灌。给定往复阀的直径等参数,通过仿真分析发现,该结构在过渡区产生的压力脉动仅为2.5%,相对于三角槽配流盘可以有效的降低轴向柱塞泵在高低压过渡区过程中的压力脉动。

The axial piston pump with the traditional triangular groove valve plate can not completely eliminate the pressure pulsation caused by reversing in the transition zone,and will produce obvious flow backflow phenomenon due to the throttling effect.Thus,the pressure pulsation in the transition zone is buffered,the vibration generated in the transition zone is reduced,and the triangular groove structure of the valve plate is cancelled to reduce the flow backflow.Given the diameter and other parameters of the reciprocating valve,it is found through simulation analysis that the pressure pulsation generated by the structure in the transition zone is only 2.5%,which can effectively reduce the pressure pulsation of the axial piston pump in the process of high and low pressure transition zone compared to the triangular groove valve plate.