摘 要： 恒压式径向柱塞泵的工作状态可分为为恒流状态和恒压状态，而定子在这两个工作状态下表现出不同的振动频率特性。首先建立了径向柱塞泵定子的动力学模型，然后对其在两个状态下的位移振动频率特性进行分析，并设计振动测试装置对JB32H型径向柱塞泵定子的进行振动试验研究。分析及试验结果表明：无论在恒流状态还是在恒压状态，定子振动具有周期性；由于恒压控制系统的作用，恒压状态下的位移振动频带要比恒流状态下的位移振动频带窄；在恒压状态的频带范围内，恒流状态下的幅值要小于恒压状态下的幅值。研究的结果有助于柱塞泵的振动噪声控制。

Abstract The working mode of constant-pressure radial piston pump includes mode of constant flow and constant pressure. The dynamic model was established and analysis was made on displacement vibration in frequency domain to the two modes. Measurement mechanism was designed to test the vibration of stator of JB32H-type radial piston pump. It is concluded from analysis and test results that the displacement of stator vibrates periodically on the two modes. The frequency band is narrower on the mode of constant pressure than that on the mode of constant flow because of action of constant pressure control system. The amplitude on the mode of constant flow is smaller than the one on the mode of constant pressure in the range of the frequency band of the mode of constant pressure. The conclusions will be helpful to the noise and vibration control of piston pump.