Approximate Solution of Load-Carrying Capacity of Turbulent Flow Sliding Bearing

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (7) : 181-186.

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Approximate Solution of Load-Carrying Capacity of Turbulent Flow Sliding Bearing

ZHANG Yong-fang1,2,LIU Cheng1, WANG Dong3, WU Peng4

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Abstract

More and more sliding bearings operate in turbulent regime due to the requirements of higher speed, higher power in rotating machinery. In order to analyze the lubrication characteristics of sliding bearings efficiently and save computational cost, an approximate solution of load-carrying capacity of oil film of finite length turbulent flow bearing is proposed based on Sommerfeld and Ocvirk number. Reynolds equation in lubrication of finite length turbulent journal bearing is solved based on multi-parametric perturbation principle. Load-carrying capacity of nonlinear oil film is obtained and comparison of the results obtained by different methods is made. The validation of the proposed method is verified. Then the influence of the change of the eccentricity and the width-to-diameter ratio on the load-carrying capacity and pressure distribution is discussed. The numerical results show that the proposed method not only approximates the load-carrying capacity of sliding bearings with varied width-to-diameter ratios efficiently, but also is suitable for those situations with large eccentricity ratio and high load.

Key words

Turbulent sliding bearing / Load-carrying capacity of nonlinear oil film / Multi-parametric perturbation principle

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ZHANG Yong-fang;LIU Cheng;WANG Dong;WU Peng. Approximate Solution of Load-Carrying Capacity of Turbulent Flow Sliding Bearing [J]. Journal of Vibration and Shock, 2014, 33(7): 181-186