Effect of Geometrical Size of Oil Groove on Bearing Stress

Aiming at the problem of selecting the appropriate oil groove size of axle box bearing, the HyperMesh software was used to establish the bearing finite element model according to the radial load distribution of the axle box bearing, and the dimension L of the bearing oil groove in the raceway direction was analyzed by the finite element method (L is 1.2, 1.5, 1.8, 2.1, 2.4 and 2.7 mm) on the bearing Von Mises stress and the maximum orthogonal shear stress. The results show that the change range and rate of Von Mises stress of each part of the bearing are different when the size L of the bearing oil groove changes in the raceway direction. When the size of the oil groove in the raceway direction L is about 2.1mm, it can not only provide lubrication and reduce wear, but also reduce the Von Mises stress of each part of the bearing. The maximum orthogonal shear stress of the bearing inner ring is obviously higher than that of the bearing outer ring and roller. When the geometric dimension of the oil groove in the raceway direction L is 2.1mm, the maximum orthogonal shear stress of the bearing can be greatly reduced and the fatigue life of the bearing can be improved.