基于有限元的不同内圈结构关节轴承径向承载分析

Radial loading analysis on spherical plain bearing with different inner ring structure based on finite element

针对宽内圈关节轴承端部台阶处容易出现应力集中而发生开裂的问题,对GEW12型关节轴承的宽内圈提出4种不同的结构形式,利用有限元法分别对其进行轴承径向受载分析,讨论结构变化对等效应力、第一主应力和整体结构位移的影响。试验测试和仿真分析结果认为:在内孔端部倒角为0.2 mm或倒圆角为1.0 mm时,宽内圈容易产生应力集中而导致开裂,而内孔端部倒斜角或沉槽5.0 mm×0.5 mm的结构未发生失效,故后者可作为宽内圈结构设计的较优选择形式。

Spherical plain bearings with extended inner ring are very likely to have cracks on their shoulders due to stress concentration. To solve this problem, the GEW12 bearing is studied with four different extended inner ring structures, and radial loading analysis are carried out for the bearing with finite element method. The influences on equivalent stress, major principal stress and overall structural displacement according to the structure changes are discussed. The test and simulation results show that, if the inner chamfer is 0.2 mm or the fillet is 1.0 mm, the extended inner rings are very probable to show cracks on their shoulders due to stress concentration; while the structure is still working when the inner chamfer or sinking groove is 5.0 mm×0.5 mm, the latter one should be considered as a better choice for the design of extended inner rings.