合理确定齿轮泵的工作转速，使齿轮与轴的转动避开啮合共振频率，可以防止噪声加剧。

Rationally define the work gear pump speed, gear and the axis of rotation to avoid engaging resonance frequency, can prevent noise intensified.

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改进后大大缩短了轴的长度，使轴的临界转速远在运行转速之上，泵由两个密封改为一个密封。

The modification resulted in a much shorter shaft with a critical speed well above the running speed, and a pump with only one instead of two seals.

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