进口压力对正开口配流盘轴向柱塞变量泵斜盘力矩的影响

以某型具有正开口配流盘结构的闭式斜盘轴向柱塞变量泵为例,建立了单柱塞腔可压缩配流模型和斜盘力矩计算公式,得出配流盘吸排油过流断面面积变化曲线和单柱塞腔预升压、预卸压曲线,研究了不同进口压力下斜盘力矩的变化规律.结果发现随着泵进口压力的增大,斜盘绕三个坐标轴上所受力矩平均值均有不同程度的减小,其中变量力矩脉动幅值明显减小,适当增大入口压力有利于减小泵的变量力矩和减弱斜盘的机械振动.

Influences of inlet pressure of axial variable piston pump with cross porting disk on its swash plate moment

Taking axial variable piston pump with close-type swash plate and a mechanism of cross porting valve plate as example, a compressible flow distribution model of single displacement chamber and computation formula of swash plate moment are established, the variation curves of the area of flow passage section of oil suction and discharge of the valve plate and the precompression and preexpansion curve of single displacement chamber are found, and the variation regularity of swash plate moment is studied under different inlet pressure. It is found out by its result that with increase of inlet pressure, the average value of the component of moment of swash plate on three coordinate axes will decrease to some extent, where the ripple amplitude of the variable moment will decreases obviously.Therefore, properly increasing inlet pressure will be of advantage for decreasing variable moment of pump and weakening the mechanical vibration of swash plate.