当节流阀前后压力比过大时,将发生空穴现象,为防止出现空穴,本文提出一种多级节流器的结构,并对其工作原理及设计方法作了详细分析。按该方法设计的节流器曾用于某钢厂真空精炼炉电极的电液伺服控制系统上的乳化液防冻装置中,并取得了良好的效果,每年为国家增产数百万元。 When the pressure ratio before and after the throttle is too large, will occur hole phenomenon, in order to prevent the occurrence of holes, this paper presents a multi-stage structure of the throttle, and its working principle and design methods were analyzed in detail. The throttling device designed according to this method has been used in the emulsion antifreeze device on the electro-hydraulic servo control system of the electrode of a vacuum refining furnace in a steel mill and has achieved good results. It has increased the output of the country by several million yuan every year.