螺旋槽机械密封的可控性  

Controllability of Spiral Groove Mechanical Seal

作　　者：周剑锋[1] 顾伯勤[1] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009

出　　处：《机械工程学报》2009年第1期106-110,共5页Journal of Mechanical Engineering

基　　金：江苏省"六大人才高峰"资助项目(07-D-027)。

摘　　要：螺旋槽机械密封动环和静环端面间的液膜厚度为微米级,易受外界干扰而破溃、失效。基于液膜流动、密封环传热和热变形的耦合分析,确定与闭合力对应的液膜几何尺寸,得到密封环温度与泄漏率。将静环内侧温度和泄漏率作为反馈参数、闭合力作为调节参数,建立螺旋槽机械密封的控制方法。依据该方法,结合反馈、调节机械系统,可实现螺旋槽机械密封的可控性运行,从而可以提高螺旋槽机械密封的变工况适应能力。The fluid film in spiral groove mechanical seal is with a micron-size thickness and can easily be broken by external dismrbance. Based on the coupling analysis of the flow of fluid film, the heat transfer and thermal deformation of sealing rings, the geometrical size of the fluid film which corresponds to the given closing force can be determined and then the temperature of the sealing rings and the leakage rate are obtained. The control method of spiral groove mechanical seal is developed by taking the inside temperature of stationary ring and the leakage rate as feedback parameters and the closing force as adjusting parameter. Based on this method as well as feedback and adjustment, the controllable operation of spiral groove mechanical seals can be realized and their adaptability to the variable work condition is improved.

关 键 词：螺旋槽 机械密封 可控性 闭合力 泄漏率 

分 类 号：TB42[一般工业技术]