AN ENERGETIC METHOD TO DETERMINE EXISTENCE OF THE RACEWAY CONTROL IN AN ANGULAR CONTACT BALL BEARING OPERATING AT LOW AXIAL LOAD

Abstract

In an angular contact ball bearing the value of the angular speed of the ball and the angular position of the angular speed of the ball are usually determined by considering the control on the outer race or on the inner race, depending of the angular speed of the inner race and axial load. In a very low axial load there is a possibility that an oscillation to appear between the outer race control and inner race control. The authors developed an energetic methodology based on the analytical power losses in the both ball-races contacts as function of angular speed of the ball (ωb) and as function of angular position (β). Based on a computer program the values of the ωb and β have been determined by imposing that the total power loss generated by the friction in ball races contacts to have minimum value. For low axial load and low rotational speed, pivoting motion on both contact ellipses have been obtained without any race control.