鹤管气阻与泵汽蚀分析

鹤管气阻与泵汽蚀所指的对象不同,但两者具有相同的物理意义,都是指当液体介质的绝对压力小于其实时饱和蒸气压时所体现的物理现象。阐述了鹤管气阻的原因及目前解决的措施,分析了离心泵汽蚀方程的物理意义。根据能量平衡方程,推导出吸入系统管道不发生气阻的安装高度方程,并与泵不发生汽蚀的安装高度方程进行了对比分析。最后得出结论,要保证离心泵正常工作,必须同时满足吸入系统工艺管道安装高度要求以及泵安装高度要求。

Analyses on Vapor Lock of Swing Arm and Cavitation Bubble Collapse of Pump

Though vapor lock of swing arm and cavitation bubble collapse of pump indicate different objects, they have same physical significance, i. e. , they all indicate the same physical phenomena of the absolute pressure of liquid less than its saturated vapor tension. The paper expatiates the reasons of swing arm vapor lock and its avoiding measures presently, and analyzes the physical significance of the cavitation equation. According to the energy equilibrium equation, the pipeline fitting altitude equation avoiding vapor lock is deduced, and the contrast analyses to pump fitting altitude is done. At last, the paper gets the conclusion that it is necessary to satisfy simultaneously with the pipeline fitting altitude and pump fitting altitude in order to make pump work in gear.