电静压系统用内啮合齿轮泵脉动试验与分析

直线共轭内啮合齿轮泵因效率高、噪声低，在电静压系统中应用越来越广泛，尤其是在振动噪声要求苛刻的舰船领域。究其原因，先从理论上得出泵出口流量波动和压力脉动的计算方法，即得到泵源流量脉动 Qs和泵源阻抗 Zs这两个特性值的方法,并用MATLAB编译数据计算处理程序。搭建试验平台，采集数据，按照理论方法测试并分别计算了不同工况下泵出口的实际流量波动量和压力脉动量。汇总各工况数据并分析得出：测试平台合理，测试计算所得数据可信；同一频谱图里，电机泵基频幅值远大于泵齿基频幅值；不同工况下测试得出内啮合齿轮泵基频及其倍频对应的流量波动量和压力脉动量的变化趋势，具体量值均较小，适合用于静音系统中。

Pulsation Test and Analysis of Internal Gear Pump Used in Electro-Hydraulic Actuator

The linear conjugate internal gear pump is widely used in the electro-hydraulic actuator (EHA) system because of its high efficiency and low noise,especially in the ship domain that vibration and noise requirements are very strict.To find out the reason,the calculation method of flow fluctuation and pressure pulsation at the pump outlet was obtained theoretically, that was,the method obtaining pump source flow pulsation Qs and pump source impedance Zs. Meantime, the data calculation and processing program was compiled by MATLAB.Then the test platform was built,the data were collected. According to the theoretical method,the actual flow fluctuation and pressure pulsation at the pump outlet under different working conditions were measured and calculated respectively. The data of each working condition are summarized and analyzed: the test platform is reasonable,the data obtained from the test and calculation are reasonable;under the same frequency spectrum,the amplitude corresponding to the fundamental frequency of the motor pump is much larger than that of the pump tooth;under different working conditions,the variation trends of flow fluctuation and pressure pulsation corresponding to the fundamental frequency and the frequency multiplication of internal gear pump are obtained by testing,the specific values are smaller,suitable for use in silent system.