高速轴承腔磁力密封温度场和变形场数值分析及试验研究  

Numerical analysis and limit condition study of temperature and deformationfields of high-speed bearing cavity magnetic seals

作　　者：潘君 邹国峰 苏志敏 刘安 程仁义 李双喜[2] PAN Jun;ZOU Guofeng;SU Zhimin;LIU An;CHENG Renyi;LI Shuangxi(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002 [2]北京化工大学机电工程学院,北京100029

出　　处：《机电工程》2025年第4期667-676,共10页Journal of Mechanical & Electrical Engineering

基　　金：国家重点研发计划项目(2018YFB2000800)。

摘　　要：在高温、高转速等极端工况条件下,磁力密封会出现摩擦热温度过高、端面变形严重的现象,导致滑油泄漏甚至密封失效等问题。为此,针对磁力密封温度场及变形场,采用有限元分析及试验验证相结合的方法,对某型磁力密封结构进行了理论分析、仿真模拟及试验研究;基于磁力密封端面密封性能,讨论了磁力密封的极限工况条件。首先,采用了有限元数值分析软件,针对磁力密封建立了其磁固热耦合分析模型;然后,基于静磁学和传热学理论,对比分析了主轴转速、介质温度、介质压力对磁力密封温度场、变形场的影响程度;最后,探讨了磁力密封的适用工况范围,并通过试验对数值分析的准确性进行了验证。研究结果表明:在标准工况14 050 r/min、150℃、0.07 MPa下,单一参数达到极限转速27 000 r/min、极限介质温度175℃、极限压力0.12 MPa时,密封端面温度和端面变形量大幅上升,密封存在失效的风险;同时90℃为滑油敏感温点,低于该温度,则端面摩擦热主导温升,高于该温度,则滑油介质影响更明显。该研究结果获得了磁力密封的适用工况范围,可用于磁力密封的设计。Under extreme working conditions,such as high temperature and high speed,the friction heat temperature of the magnetic seal will be too high and the end face will be seriously deformed,which will lead to the leakage of lubricating oil and even the failure of the seal.Therefore,aiming at the temperature field and deformation field of magnetic seal,the theoretical analysis,simulation and experimental study of a magnetic seal structure were carried out by combining finite element analysis with experimental verification.Based on the sealing performance of magnetic seal,the limit working conditions of magnetic seal were discussed.Firstly,a magnetic solid thermal coupling analysis model for magnetic seals was established using finite element numerical analysis software.Then,an analysis was carried out to evaluate the impact of rotational speed,medium pressure and medium temperature on the temperature and deformation fields of the magnetic seal,employing the principles of static magnetism and heat transfer.Finally,the applicable operational parameters for the magnetic seal were identified and the precision of the numerical analysis was validated through experimentation.The research results of the study show that under standard working conditions 14050 r/min,150℃,0.07 MPa,when a single parameter reaches the limiting speed of 27000 r/min,the limiting temperature of 175℃,the limiting pressure of 0.12 MPa,the temperature and deformation of the seal end face increase significantly,it increases the risk of seal failure.At the same time,the temperature of 90℃represents the sensitive temperature point of the slippery oil.The frictional heat of the end face dominates the temperature rise below this temperature.The influence of the slippery oil medium is evident above this temperature.This leads to the formulation of a range of applicable conditions that can be used in the design of magnetic seals.

关 键 词：磁力密封失效 高温高速 磁固热耦合 主轴转速 介质温度 介质压力 端面密封性能 

分 类 号：TH134[机械工程—机械制造及自动化] V233[航空宇航科学与技术—航空宇航推进理论与工程]