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测试液压泵的压力脉动,关键是观察其波形是否失真,然后再量其峰值的大小。波形正确,峰值大小就肯定,其值才真实。若波形受到干扰,其峰值就毫无意义,完完全不能反映泵的脉动性能指标。液压泵输出的流量受阻而建立起压力,压力脉动即来源于流量的脉动。任何类型的液压泵,输出的流量均是脉动的。螺杆泵和凸轮转子叶片泵理论上无脉动或脉动甚小,但由于工艺制造误差使泵的内泄不均匀,流量脉动仍然存在。衡量泵的脉动特性,应测流量的脉动。但目前的流量计难以满足频响特性要求,都以测其压力脉动来衡量流量脉动特
Test the pressure pump hydraulic pulsation, the key is to observe whether the waveform distortion, and then measure the size of its peak. The waveform is correct, the peak size is positive, its value is real. If the waveform is disturbed, the peak value is meaningless, absolutely can not reflect the pump pulsation performance index. Hydraulic pump output flow blocked and established pressure, pressure pulsation that is derived from the flow pulsation. Any type of hydraulic pump, the output flow is pulsating. Screw pump and cam rotor vane pump theoretically no pulsation or pulsation is very small, but due to process manufacturing error so that the internal pump leakage is not uniform, the flow pulsation still exists. Measure the pulsation characteristics of the pump and measure the pulsation of the flow rate. However, the current flow meter is difficult to meet the requirements of frequency response, both to measure the pressure pulsation to measure the flow pulsation