介质温升条件下流体静压型机械密封的瞬态响应研究  

Research on Transient Response of a Hydrostatic Mechanical Seal during Sealed Medium Temperature Rise

作　　者：方艳峰[1] 彭旭东[1,2] 孟祥铠[1,2] 白少先[1,2] 盛颂恩[1] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310032 [2]浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310032

出　　处：《润滑与密封》2010年第12期32-35,47,共5页Lubrication Engineering

基　　金：国家自然科学基金资助项目(50775206);浙江省杰出青年人才基金项目(R1090833);浙江省自然科学基金项目(Y1090807);浙江省高校中青年学科带头人资助项目(G0701102008610)

摘　　要：考虑润滑液膜黏温效应与黏压效应,建立介质温升条件下流体静压型机械密封的热流体润滑动力学模型,采用有限差分法对广义瞬态Reynolds方程、能量方程和热传导方程等进行联合求解,采用Newmark法和时间步进法对动力学方程进行数值计算,分析在介质温升条件下机械密封性能参数的瞬态响应。结果表明,介质温度瞬时升高会破坏机械密封原有的平衡状态,密封性能参数将在很短时间内从原有稳定值振荡迁移到另一稳定值。Considering the effects of sealed medium viscosity varying with temperature and pressure,a thermal-hydrodynamic lubrication model was presented for a hydrostatic mechanical seal with both convergent face and sealing dam onto its surface during a temperature rise of sealed medium.Finite difference method was used to obtain the joint solution for the generalized Reynolds equation,energy equation,and thermal conduction equation.Newmark method and time-marching method were used to solve the equation of motion.Transient response of sealing performance parameters with the temperature rise was analyzed.The results show that a temperature rise can disturb the initial stability of such a mechanical seal.Sealing performance parameters would oscillate and transfer from the initial stable value to another in a short time due to the temperature rise.

关 键 词：机械密封 流体静压润滑 瞬态响应 介质温升 核主冷泵 

分 类 号：TH117.2[机械工程—机械设计及理论]