【摘要】 针对高速涡轮泵螺旋槽端面密封,建立了综合考虑泄漏和传导的密封热流模型,给出了端面密封静态和动态性能计算方法。通过对水介质下密封性能的计算,研究了工作参数对螺旋槽端面密封的基本静态性能以及刚度、阻尼表征的动态性能的影响规律。结果表明:在小于5μm的正常工作间隙下,转速对开启力、刚度和阻尼影响很大,而对泄漏量的影响很小;工作间隙越小,密封具有越高的刚度、越低的泄漏量,但运行过程中的功耗较高、温升较大。更多还原

【Abstract】 For the mechanical seal with spiral groove on its surface applied in the high-speed turbo-pump,a thermal model of the mechanical seal considering leakage and thermal-conduction had been presented.The solutions of static and dynamic characteristics of this type of mechanical seal were introduced.The influence of working parameters on the basic static characteristics such as opening force,leakage and power loss,and the dynamic characteristics such as stiffness and damping were discussed.The results show when the film thickness is less than 5μm, the rotating speed has great effect on the opening force,stiffness and damping,while has little effect on leakage.When hydrodynamic mechanical seal works under the thinner film thickness(<3μm) conditions,the higher power loss and higher temperature rise are inevitable,but the seal provides higher stiffness and lower leakage.更多还原