Dynamic performance analysis of trilobe raceway cylindrical roller bearings with thermo-mechanical coupling

ZHOU Mingzhe; DENG Si'er; CUI Yongcun; LI Wenchao; GAO Lixia

doi:10.16578/j.issn.1004.2539.2026.04.012

Abstract：[Objective]The trilobe raceway cylindrical roller bearing forms a negative clearance through three low points of the raceway profile,that can solve the problem of high-speed light-load slip in bearings.However,temperature variation can significantly affect the magnitude of the negative clearance.Therefore,a thermo-mechanical coupled dynamic model for non-circular raceway cylindrical roller bearings was established for trilobe raceway cylindrical roller bearings based on heat transfer theory and rolling bearing dynamic theory.[Methods]Firstly,the dynamic differential equations were solved using the Gear stiff variable-step integration algorithm with a'predictor-corrector'scheme,and the temperature field of the bearing was calculated by the finite element method.Secondly,the influences of rotational speed,ambient temperature,outer ring mounting rotation angle,and raceway profile parameters on the performance of trilobe raceway bearings were analyzed.Finally,test verification was carried out on an aero-engine main shaft bearing test rig.[Results]The results show that the contact stresses between the roller and the inner/outer races increase by 18%-20%when the thermo-mechanical coupling effect is considered.With the increase of inner ring rotational speed,the growth rate of cage slip ratio is relatively small under the consideration of thermo-mechanical coupling effect.As the ambient temperature rises,the base circle clearance decreases gradually,and the contact stresses between the roller and the inner/outer races increase significantly.When the outer ring mounting rotation angle is 60°,the stress in the load zone is minimized and the rated life of the bearing is maximized.The raceway profile parameters can significantly affect bearing performance,and the bearing exhibits better performance when the base circle radius is 60.54 mm and the distance between the high and low points of the raceway profile is(0.173±0.007)mm.