Gear pump pulsation, noise, and efficiency are the three major indicators for evaluating pump performance. They are interrelated and interact with each other. The fluid noise of the pump is mainly caused by the flow pulsation of the pump. Therefore, the noise and pulsation of the gear pump are closely related. While controlling the flow pulsation of the gear pump, the noise of the pump can be reduced. While reducing the noise and pulsation of the pump, care should be taken to prevent the volume ratio of the pump from decreasing. In the method of pulsation and noise, the cost of volumetric efficiency is often sacrificed. Therefore, when improving the performance of a gear pump, the effects of the three should be considered in order to obtain the best results.

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