The mechanical seal utilized in submarine's weapon ejection pump works under fluctuant working pressure and is used in low frequency, and high reliability is indispensable.
水下舰艇武器推进泵的机械密封装置的工作压力波动、使用频率小，并要求可靠性高。
The mechanical system is composed of testing mechanical assembly, hydraulic loading pump station, pressure increasing and holding device for tested media, and sensors.
其中，机械系统由试验台架、液压加载泵站、试验介质增压保压装置和传感器等部件组成；
Discusses the relationship between pumping speed and inlet pressure of an oil-sealed mechanical pump and the reason why its pumping efficiency drops down.
该文介绍了油封机械泵的抽速与入口压力的关系、泵抽气效率下降的原因，指出泵入口管道的流导和油蒸汽逆流是造成泵抽速下降的主要原因。
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