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齿轮泵的噪声可以采用压力密封滑动轴承的设计来减小。这种型式的齿轮泵已大量生产,并具有效率高、结构紧凑,单位功率重量小和价格低廉的特点(图1)。外啮合齿轮泵产生的噪声外啮合齿轮泵的噪声可以由机械的或液力的原因所引起。由于外啮合齿轮的制造方法不同,机械噪声通常不予考虑。液压噪声可由下述原因造成:1、油腔的油压波动;2、齿轮轮齿之间压力增大;3、齿轮泵流量变化引起的压力脉动。油腔内油压波动可以靠泵中的卸压槽来大大减小。流量变化引起的压力脉动决定于系统的设计(即管路长
Gear pump noise can be reduced with pressure-sealed plain bearings. This type of gear pump has been mass-produced and has the characteristics of high efficiency, compactness, low power consumption per unit weight, and low cost (Figure 1). Noise generated by external gear pump The noise of external gear pump can be caused by mechanical or hydraulic reasons. Due to the different manufacturing methods of external gear, mechanical noise is usually not considered. Hydraulic noise can be caused by the following reasons: 1, oil pressure fluctuations in the oil chamber; 2, the pressure between gear teeth increases; 3, pressure fluctuations caused by gear pump flow changes. The oil pressure fluctuation in the oil chamber can be greatly reduced by the pressure relief groove in the pump. The pressure pulsations caused by flow changes depend on the design of the system (ie the length of the pipe