Accession Number : AD0655030

Title :   MOMENTS ORIGINATING FROM ERRORS IN THE FORM OF ROLLING SURFACES OF A BALL BEARING,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Rodionov,E. M.

Report Date : 23 DEC 1966

Pagination or Media Count : 30

Abstract : The paper proposes, in a general form, a method for determining the translational displacements and additional moments of friction affecting rotation in ball bearings which are produced by translational motion (in addition to the vibration of fast moving shafts) of the rotating ring due to defects in the shape of the rolling surfaces of rings and balls as well as to the presence of a radial clearance, a bearing stiffness which varies with the angle of rotation, and other causes. These additional moments resisting the rotation of a ball bearing vary with the angle of rotation and, in contrast to the moments due to frictional forces, do not change their sign when reversing the bearing motion and do not decrease with vibration. The magnitude and character of the variation in these moments with the angle of rotation is closely related to the initial relative position of bearing parts as well as to the positions of balls as a result of vibration, clogging up, etc., and therefore these moments change when the relative position of the rings changes. The instability of the additional moments causes random errors in instruments, and unstable drift of gyroscopes which cannot be eliminated by balancing or correction. The translational displacements of the rotating ring and the additional moments are examined analytically for the case of an actual ball bearing.

Descriptors :   (*BALL BEARINGS, FRICTION), USSR, MOMENTS, DEFECTS(MATERIALS), SURFACE PROPERTIES, RINGS, SPHERES, GYROSCOPES, ERRORS, ROTATION

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE