新型气体离心密封的试验研究

针对密封气体时普通离心密封出现的问题,提出了一种带有连续注排密封液结构的离心密封装置,介绍了该密封的工作原理及其特点。设计并研制了离心密封试验样机,测量并采集了密封介质压力、密封液流量、温度等密封性能参数,研究了性能参数随主轴转速以及密封液注入压力的变化规律。研究表明,新型离心密封适用于高转速下密封气体的场合,而且转速越高,可以密封的介质的压力越高,但搅拌热也越大;而增加密封液注入压力,有利于增大密封液流量,带走更多的搅拌热量。

Experimental Research on New Type of the Centrifugal Seal for Sealing Gas

Based on the problems of the common centrifugal seal for sealing gas,a structural configuration of the new-type centrifugal seal device with continuous injection and elimination of the sealing fluid is proposed,and the operating principle and feature of the seal is established.The experimental equipment of the centrifugal seal are designed and manufactured.The parameters,including the pressure of the sealing medium,the flow rate and the temperature of the sealing fluid,are measured and collected.The changing regularity of the performance parameter with the spindle speed and the injection pressure of the sealing fluid is considered.The research shows that the new type centrifugal seal is suit for the condition of gas seal at high speed.The higher the speed is,the higher sealing pressure of the medium is and the greater the heat of stirring is.The flow of the sealing fluid is increased and the heat of stirring is carried away by increasing the pressure of the injection sealing fluid.