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。其次,还对油封机械泵的消耗功率与入口压力的关系进行了分析,指出最大功率时所对应的入口压力,同时还对泵油温度对功率的影响作了分析;给出对泵油性能的要求。 This paper introduces the relationship between pumping speed and inlet pressure of oil - sealed mechanical pump and the reason of decreasing pumping efficiency. It is pointed out that the leading of pump inlet pipe and the reverse flow of oil steam are the main reasons for the pump pumping speed decreasing. Secondly, the relationship between the power consumption of the oil seal mechanical pump and the inlet pressure is also analyzed. The inlet pressure corresponding to the maximum power is also pointed out. At the same time, the influence of the oil temperature on the power is also analyzed. Claim.