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Research Papers: Elastohydrodynamic Lubrication

Lubrication and Thermal Failure Mechanism Analysis in High-Speed Angular Contact Ball Bearing

[+] Author and Article Information
Wang Yunlong, Li Yulong, Zhao Ziqiang

School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China

Wang Wenzhong

School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China
e-mail: wangwzhong@bit.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received May 13, 2017; final manuscript received October 15, 2017; published online December 20, 2017. Assoc. Editor: Xiaolan Ai.

J. Tribol 140(3), 031503 (Dec 20, 2017) (11 pages) Paper No: TRIB-17-1186; doi: 10.1115/1.4038356 History: Received May 13, 2017; Revised October 15, 2017

Lubrication analysis of rolling bearing is often conducted with assumed operating conditions, which does not consider the effect of internal dynamics of rolling bearing. In this paper, the effects of the applied load and bearing rotational speed on the lubrication performance in an angular contact ball bearing are conducted, which combines the bearing dynamic analysis and thermo-elastohydrodynamic lubrication (TEHL) analysis. First, the internal motions and contact forces are obtained from the developed bearing dynamic model, and then were integrated into the TEHL model to investigate the lubrication performance of the bearing. The results show that the rotational speed and external load has significant effects on film thickness, temperature, and power loss; if the improper axial load is applied for certain bearing speed, the lubrication performance will deteriorate and thermal failure may occur; there exists critical load or speed to keep good lubrication performance and avoid thermal failure; the skidding contributes to the thermal failure and bad lubrication performance.

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Figures

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Fig. 1

Motion of a ball in an angular contact ball bearing

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Fig. 2

Contact between ball and inner raceway

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Fig. 3

Flowchart of numerical analysis

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Fig. 4

Effect of axial load on lubrication performance: (a) minimum film thickness, (b) central film temperature profiles, (c) maximum temperature, and (d) power losses

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Fig. 5

Motions of ball with different applied axial load

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Fig. 6

Critical axial load for different bearing rotational speed

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Fig. 7

Effect of bearing rotational speed on lubrication performance: (a) maximum temperature, (b) temperature profiles along contact centerline, (c) minimum film thickness, and (d) power losses

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Fig. 8

Variation in motions of ball with bearing rotational speed

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Fig. 9

Variation in film temperature and thickness with axial load in combined loaded condition with radial load of 300 N

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Fig. 10

Variations in contact forces and motions with a radial load of 300 N

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Fig. 11

Variation in film temperature and thickness with axial load in combined loaded condition with radial load of 700 N

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Fig. 12

Variations in contact forces and motions with a radial load of 700 N

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