轴瓦热弹变形对大直径重载滑动轴承性能的影响  

The Performance Study on Thermo-elastic Deformation of Journal Bearing With Large Diameter and Heavy Load

作　　者：张帆[1] 钟海权 孙丽军[1] 官永胜 袁小阳[1] 

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049 [2]东方电气集团东方电机有限公司,四川德阳618000

出　　处：《机械设计与研究》2014年第2期59-64,共6页Machine Design And Research

基　　金：国家科技重大专项子课题下属专题(2010ZX06004-013-04-08)

摘　　要：针对大直径重载实际椭圆轴承进行热弹性能研究,含静特性和动特性,变形影响的讨论主要是个案,并由此适度拓展提出了变形控制思想和初步技术。计算中,采用课题组轴承计算FORTRAN软件和商用ANSYS软件联合仿真考虑瓦块变形下的轴承特性,结果表明:表面弹性变形对轴承的间隙、最小油膜厚度和温度分布等静特性的影响较小;相比弹性变形,轴承瓦面热变形对轴承静特性影响较大,特别是功耗和最小油膜厚度,变形量与最小油膜厚度量级相同。对于较大变形的影响,提出了通过改变瓦块约束方式或结构参数两种控制变形技术来改善轴承性能,这为重载轴承的优化设计和承载能力提升提供了新的思路。因此大直径重载轴承设计时,应考虑轴承在运行时的热效应,转速越高、载荷越大时,热效应越显著。Thermo-elastic deformation of bearing pad surface has a significant effect on journal bearing with large diameter and heavy load. The static and dynamic performances of the bearing for pad deformations are researched in this paper, and some deformation control ideas and preliminary technique are proposed. The bearing calculation software and ANSYS simulation software were jointly used to calculate the bearing performances in considering of the deformations. The simulation results show that the surface elastic deformations have a small effect on the bearing clearance, minimum film thickness and temperature distribution and other static characteristics; on the contrary, the thermal deformations have a greater impact on the bearing static performance, especially on the bearing power consumption and minimum film thickness, and the deformation has a same order of magnitude with the minimum film thickness. Two deformation control ideas, changing pad restraint or the structure parameters, have proposed to improve bearing performances for the thermal deformation, which provide a new way of thinking for the optimization techniques and carrying capacity of heavy load bearing.

关 键 词：椭圆轴承 大直径 重载 热弹变形 

分 类 号：TH122[机械工程—机械设计及理论]