压出壳是6618型潜水泵的重要零件之一。图1为该件简图,其结构实际是由压出壳与末级中壳组合而成,因此,大大增加了铸件复杂程度和生产难度。中壳部分内装叶轮,压出壳部分的法兰盘与出水管相接,它既承受静、动载荷、又承受高压。8枚扭曲叶片均布, Pressure shell is one of the important parts of 6618 submersible pump. Figure 1 is the simplified diagram of the structure, the structure is actually composed of the extrusion shell and the end of the middle shell combination, thus greatly increasing the casting complexity and the difficulty of production. Part of the shell in the impeller, the shell part of the pressure out of the flange connected to the outlet pipe, which both withstand static and dynamic load, but also to withstand high pressure. 8 twisted leaves uniform,