Reciprocating pump is one of the main equipments to acquire vaccum. Balance pipe is its important part, it largely affects the working efficiency and energy consumption of vacuum pump. Its flow is very complicated.

• 往复式真空泵是获得真空的主要设备之一,平衡通道是它的很重要组成部分,它对真空泵的工作效率和能量消耗有很大影响,且流动复杂,以前对它的设计都采用经验的方法。