Effect of the Lubrication Parameters on the Ceramic Ball Bearing Vibration in Starved Conditions

Abstract

The thickness of the oil film in ceramic ball bearings varies greatly at starved lubrication conditions, thus leading to non-uniform contact between the balls and raceways in the circumference. The lubrication parameters have a direct impact on the thickness of the oil film and then affect the dynamic characteristics of the ceramic ball bearings. A nonlinear dynamic model of ceramic ball bearing with limited lubrication is presented in this paper, and parametric studies on the effect of lubrication parameters are conducted. In starved conditions, the uneven contact between the ball and ring leads to changes in vibration, and the inner ring vibration is applied to evaluate the degree of starved lubrication. The results show that as the oil quantity increases, the bearing stiffness increases and results in increased peak frequency. As the oil quantity decreases, the thickness of the oil film reduces, resulting in the bearing vibration increase. The research findings provide a theoretical reference for ceramic ball bearing design and have guided significance for improving the service performance of ceramic ball bearings.

Friction Properties and Distribution Rule of Lubricant Film of Full Ceramic Ball Bearing Under Different Service Condition

“…The lubricating oil viscosity is affected by the shear thinning effect. The relationship between the shear rate and the lubricating oil viscosity can be expressed by the Cross formula: (9) where μ 1 and μ h are the viscosity of the lubricating oil at low and high shear rates, n 1 and n 2 are the fitting parameters related to the lubricating oil, γ • is the shear rate.…”

“…Because full ceramic ball bearings work at high speed, frequently start-stop, have variable loads, overload, are subject to vibrations and go through other harsh working conditions, they often operate in a state of mixing and boundary lubrication [4][5][6][7][8], which causes pitting wear on the rolling body and raceway surface of the ring, and then leads to the failure of the full ceramic ball bearings. According to statistics, the failure of full ceramic ball bearings caused by poor lubrication accounts for about 72.2 % [9][10].…”

The effect of lubricant viscosity on the performance of full ceramic ball bearings

“…As a basic guarantee for the operation of full ceramic ball bearings, optimal lubrication conditions are one of the important parameters affecting their performance. According to statistics, the failure ratio of full ceramic ball bearings caused by poor lubrication was about 72.2% [5,6]. For full ceramic ball bearings, lubrication theory and methods are a vital part of the overall process of design, manufacturing and application.…”

Experimental Research on the Influence of Working Conditions on Vibration and Temperature Rise of Si3N4 Full‐Ceramic Bearing Motors

“…Applying proper axial preloads [8] to the bearing can not only reduce the axial clearance of the bearing but also improve the stiffness of the shaft system to reduce vibration and noise [13]. Suitable lubrication [14,15] can ensure effective lubrication of spindle motor bearings and reduce bearing wear and the generation of heat by friction, improving the performance and life of bearings. erefore, it is of great significance to carry out researches on spindle motor vibration and temperature rise, starting from the bearing material, preload, and lubrication conditions.…”