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本文工作是作者对密封水泵强度一系列研究的延续．在论文‘圆柱与球壳连接的压力容器强度分析’的基础上着手，提出一种新的技术，计算连接刚性抽水管的水泵底部单位球单元的应力．该方法用复变量表示抽水机工作时产生的内力．
The work of this paper is a continuation of the author’s series of researches on the intensity of hermetic pump. Based on the analysis of the strength of the pressure vessel connected with the cylinder and the spherical shell, a new technique was proposed to calculate the stress of the unit ball at the bottom of the pump connected to the rigid suction pipe. The method uses complex variables that exert internal forces generated by the pump.