Abstract
This paper developed a coupled model, incorporating the quasistatic model, fatigue life model, and mixed lubrication model, to investigate the effect of misalignment angle on high-speed cylindrical roller bearings. The model is verified by comparing with the published literature results. Then, a parametric analysis is carried out. The results show that as the misalignment increases, the load distribution is basically unchanged, but the fatigue life of the roller bearing decreases due to the variation of contact pressure, and the skewing moment of single roller contact pair increases. Furthermore, the optimal design of roller profile needs to consider the effect of lubrication in order to improve the fatigue life of roller bearings. In general, the optimal crown drop is too small according to the design from the slicing technique.
Highlights
Cylindrical roller bearings are often used in high-speed engine applications
Experiments by Tallian [6] and Liu et al [7] have demonstrated that the film thickness has a significant effect on the fatigue life of rolling bearings
Shi and Wang [11] coupled the quasidynamic model with the elasto-hydrodynamic lubrication model to evaluate the lubrication performance of cylindrical roller bearings
Summary
Cylindrical roller bearings are often used in high-speed engine applications. In these applications, cylindrical roller bearings are very sensitive to the misalignment of the ring which can lead to the reduction of fatigue life and the cage instability. Warda and Chudzik [4] applied the quasistatic model to obtain the load distribution and evaluated the fatigue life under misalignment by calculating the subsurface stresses. E coupled quasistatic and mixed lubrication model will be applied to evaluate the load distribution, lubrication condition, fatigue life, and skewing moments of the single roller contact pair under a misaligned operating condition. E skewing moment is caused by nonuniform shear stress, as shown, and can be calculated by Once these three models are connected, the coupled model outputs the following useful variables to evaluate the tribological performance of high-speed cylindrical roller bearings under misalignment:. (a) e inner/outer ring contact load in different misalignment angles (b) e film pressure/thickness profile in different misalignment angles (c) e fatigue life of high-speed cylindrical roller bearing under misalignment (d) e skewing moment of single roller contact pairs under misalignment
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