并对改进后传动轴的临界转速进行了测定分析。

Critical rotary speed of the revamped driving shaft is also measured and analyzed.

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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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从机械振动理论出发，用可靠性设计中的联结方程，得出了其在常用工况下按传动轴的临界转速进行可靠性设计的公式。

The paper starts from the theory of mechanical vibration, with tie equipment in the reliability design, and obtains a formula of design on critical speed in common use situation.

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