摘要
为了研究滑动轴承轴瓦变形对轴颈中心位置测量结果的影响,考虑气液两相流、温黏效应等因素,建立了滑动轴承温度场、压力场求解模型,以某滑动轴承为例,对轴瓦内温度、压力及两者导致的轴瓦变形量进行了计算,分析了轴瓦变形对轴颈中心位置测量结果的影响。结合某工程实例,解释了升速和带负荷运行过程中发生的轴颈中心位置异常偏移现象。结果表明:温度和压力均会导致轴瓦变形,温度导致的变形量远大于压力导致的变形量,若不考虑温度导致的轴瓦热变形,会对轴颈中心位置测量结果产生较大误差。
To study the influence of sliding bearing shell deformation on the measurement result of journal center position,a solution model of temperature and pressure fields of the sliding bearing was established considering the gas-liquid two-phase flow,the temperature-viscous effect.Taking a sliding bearing as an example,temperature and pressure distribution of the bearing shell and the deformation caused by the former were calculated while the effect of bearing shell deformation on journal center position was furtherly analyzed.Moreover,combined with an engineering project,the abnormal deviation of journal center position occurred in the process of speed-up and operation under load was explained.Results show that bearing shell can be deformed by temperature and pressure,and the amount of deformation due to the temperature is greatly higher than the pressure.Unconsidering the bearing shell thermal deformation caused by temperature,a large measurement error of journal center position can occur.
作者
许泽玮
杨建刚
沈德明
XU Zewei;YANG Jiangang;SHEN Deming(National Engineering Research Center of Turbo-Generator Vibration,Southeast University,Nanjing210096,China;Nanjing Sciyon Wisdom Technology Group Co.,Ltd,,Nanjing 211102,China;Key Laboratory of Thermal Process Intelligent Control of Jiangsu Province,Nanjing 211102,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第3期208-213,共6页
Journal of Chinese Society of Power Engineering
关键词
滑动轴承
计算流体力学
热变形
轴颈中心位置测量
sliding bearing
computational fluid dynamics
thermal deformation
measurement of journal center position
