基于正交试验法的三点接触球轴承结构参数优化设计

Optimal Design of Structure Parameters for Three Point Contact Ball Bearing Based on Orthogonal Test

以某航空发动机主轴用三点接触球轴承为研究对象,建立以球数、球径、垫片角、内圈沟曲率半径系数、外圈沟曲率半径系数、径向游隙为影响因素,以轴承基本额定寿命为目标函数的优化模型,基于正交试验法对轴承结构参数进行优化设计及分析,结果表明:增大球数、球径和减小内外圈沟曲率半径系数有利于提高轴承寿命;径向游隙、垫片角对寿命的影响规律复杂,应在合理的范围内择优选取。

Taking the three point contact ball bearing for main shaft of an aero engine as a research object,the optimization model is established with ball number,ball diameter,gasket angle,inner ring groove curvature radius coefficient,outer ring groove curvature radius coefficient,radial clearance as influencing factors and basic rating life of the bearing as objective function.Based on orthogonal test,the structure parameters of the bearing are optimally designed and analyzed.The results show that increasing ball number,ball diameter and reducing inner and outer ring groove curvature radius coefficients are beneficial to improve life of the bearing;the influence of radial clearance and gasket angle on life is complex and should be selected within a reasonable range.