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Applications

Load Calculation and Life Prediction for Auto Water Pump Bearing

[+] Author and Article Information
Zhengmei Li, Qiong Zhou

School of Mechanical and Power Engineering,  East China University of Science and Technology, Shanghai 200237, China

Jianping Tang, Jianwen Wang

Jiangsu Rongtianle Machinery Co., Ltd., Changzhou 213000, ChinaSchool of Mechanical and Power Engineering,  East China University of Science and Technology, Shanghai 200237, China

Qi An1

Jiangsu Rongtianle Machinery Co., Ltd., Changzhou 213000, Chinaanqi@ecust.edu.cnSchool of Mechanical and Power Engineering,  East China University of Science and Technology, Shanghai 200237, Chinaanqi@ecust.edu.cn

1

Corresponding author.

J. Tribol 134(4), 041103 (Sep 04, 2012) (8 pages) doi:10.1115/1.4003764 History: Received August 18, 2010; Revised March 03, 2011; Published September 04, 2012; Online September 04, 2012

Taking the water pump bearing with one roller row (WR)-type auto water pump bearing as a research sample, an analytical calculation method is developed to improve the accuracy and efficiency of the current calculations for the bearing loads and life in engineering application. Considering the misalignment due to the deflection of the bearing spindle, the bearing internal loads and deformations under the action of the complicated external space loads are obtained. The bearing fatigue life including the lives of the rollers and the balls is also calculated with considering the non-normal load distribution caused by the spindle deflection and the roller tilt. The bearing load and life calculation results are compared with those calculated by the traditional method in which the deflection of the bearing spindle and the roller tilt are ignored. The effects of the bearing spindle deflection on the load distribution and the life of the auto water pump bearing are analyzed and discussed. The life decrease in the auto water pump bearing is significant due to the deflection of the bearing spindle and it is recommended to give more attention to this deflection for the high quality of the bearing design and calculation.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Mechanical model of WR auto water pump bearing

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Figure 2

Global deformation of WR auto water pump bearing

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Figure 3

Serial number and azimuth of each rolling element

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Figure 4

Roller-raceway geometrical interference due to spindle misalignment and roller tilt at the angular position ψj. (a) Geometrical interference between roller and raceway and (b) schematic of the roller.

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Figure 5

Ball-raceway contact deformations at a ball azimuth

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Figure 6

Load per unit length along the roller-outer raceway contacts

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Figure 7

Load distributions among the rollers and the balls

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