含气泡和气穴的液压管路瞬态实验研究

Experiment Research on the Fluid Transient in Hydraulic Pipeline including Cavitation and Gas Bubbles

一端连接阀门、另一端连接油箱的等径液压管路中,当阀门突然关闭时,管路中会产生压力和流量的瞬态脉动过程,本文对这一管路中的瞬态脉动过程进行了观察及测量,利用动态压力传感器记录了管路中的压力脉动过程,记录结果表明,当阀门关闭速度较快时,管路中的压力会降低到大气压以下,甚至达到绝对零压,导致管路中气泡和气穴的产生。

In a hydraulic pipeline with a reservoir at one end and a valve at the other end, after the valve is suddenly shut off, there will be a fluid transient in the pipeline. The fluid transients in low pressure pipeline were researched by means of experiments. Two piezoelectric pressure transducers were used to measure the pressure pulsation. When the valve is closed quickly, the pressure will fall below the atmospheric pressure or even reaches absolute zero, then gas bubbles and cavitation will occur inside the fluid.