In order to solve the problem of too big vibration and noise caused by pressure pulsation from periodic discharge flow variation of piston pumps,a new type of wave absorber combining the accumulator group and the orifice plate was designed.The parameters of the accumulator group were optimized by theoretical calculation and numerical simulation.The results show that the accumulators can effectively decrease the pressure pulsation under different working conditions effectively by combining accumulators with different pressures,and the attenuation ratio is about 50%;The wave absorber with combined accumulators and orifice plates can effectively decrease the pressure pulsation in the fluid,especially in the frequency band under 250 Hz.The insertion loss can reach more than 7 dB for different discharge back pressures.The research results of this article have reference value for the noise reduction optimization design of plunger pumps.
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