摘要
通过联立求解质量守恒的广义Reynolds方程、能量方程、固体热传导方程和固体变形方程,建立了轴颈倾斜的径向轴承三维热弹性流体动力润滑(TEHD)模型.在此基础上,深入研究了轴颈倾斜径向轴承的TEHD性能.结果表明,弹性变形和热变形都对轴颈倾斜径向轴承的性能具有显著影响.当只考虑弹性变形时,油膜厚度变化曲线出现了局部"凸"的形状,且最大油膜压力减小;当只考虑热变形时,油膜厚度变化曲线出现了局部"凹"的形状,且最小油膜厚度增大,但热变形对最大油膜压力的影响不大;当同时考虑弹性变形和热变形(即完整的TEHD模型)时,轴颈倾斜径向轴承的所有性能参数都发生了明显的变化,因此,对于重载高速的操作工况,有必要建立轴颈倾斜径向轴承的TEHD模型.
By the synthetic solution of the generalized Reynolds equation, three-dimension energy equation, and heat conduction equations and deformations of the solids, this paper developed the thermoelastohydro- dynamic （TEHD） model of misaligned plain journal bearing （MPJB）. On the basis, series of results were provided to examine the effects of elastic and thermal deformations on the performance of the MPJB. The results show that the elastic and thermal deformations have remarkable influence on the performance of the MPJB. The elastic deformation leads to the creation of the local ＂pocket＂ in the oil film thickness. Under this condition, the maximum oil film pressure decreases significantly. The thermal deformation gives rise to the emergence of the local ＂bowl＂ in the oil film thickness. Therefore, the minimum oil film thickness increases obviously. However, the influence of the thermal deformation on the maximum oil film pressure is very small. All properties of the bearing vary significantly for the complete TEHD simulation, thus, it is essential to develop the TEHD model for analyzing the bearing performance.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2013年第9期1347-1352,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(51175332.50935004
50805091
51205247)
机械系统与振动国家重点实验室资助项目(MSVZD201104)
关键词
轴颈倾斜径向轴承
热弹性流体动力润滑
热变形
弹性变形
misaligned plain journal bearing （MPJB）
thermoelastohydrodynamic （TEHD） lubrication
thermal deformation
elastic deformation
