A Study of the Effect of the Discharge Line on the Amplitude of Pressure Pulsations in Axial-Piston Pumps

The problem of pressure pulsations in axial piston pumps is considered in this article. The review of literature shows that existing theoretical models do not take into account such external factors as the operation of the pump control valve and the discharge line characteristics on the level of pressure pulsations. A mathematical model of pressure pulsations in an axial-piston pump is developed that takes into account the influence of non-stationary processes in the discharge line on the magnitude of pressure pulsations. Experimental studies of the operation of the pump with a discharge line having different characteristics have shown the presence of non-stationary processes and confirmed the influence of the discharge line characteristics on the level of pressure pulsations. It is established that the pressure pulsations caused by the non-stationary processes can be several times higher than the amplitude of pressure pulsations due to the unevenness of the flow. The results of calculations and experimental studies have shown a close relationship of the levels of amplitudes and frequencies of pressure pulsations of the pump flow. The developed mathematical model can be applied when designing other axial piston pumps using the presented phase distribution system.

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