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Research Papers: Hydrodynamic Lubrication

Thermal Behavior of Multidisk Friction Pairs in Hydroviscous Drive Considering Inertia Item

[+] Author and Article Information
Fangwei Xie

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: xiefangwei@ujs.edu.cn

Jianzhong Cui

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: cuijianzhong21@163.com

Gang Sheng

School of Mechanical Engineering,
iangsu University,
Zhenjiang 212013, China
e-mail: 1264336520@qq.com

Cuntang Wang

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: ctwang@ujs.edu.cn

Xianjun Zhang

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: zxj19884228@126.com

1Corresponding authors.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received November 13, 2013; final manuscript received July 14, 2014; published online August 4, 2014. Assoc. Editor: Jordan Liu.

J. Tribol 136(4), 041707 (Aug 04, 2014) (11 pages) Paper No: TRIB-13-1232; doi: 10.1115/1.4028062 History: Received November 13, 2013; Revised July 14, 2014

Considering the influence of the inertia item on temperature distribution of multidisk friction pairs in hydroviscous drive (HVD), transient temperature models are derived with the aim of revealing the effect of engagement pressure, lubricant viscosity, viscosity–temperature correlation, surface roughness and the ratio of inner and outer radius of disks on temperature distribution. The results indicate that unsteady temperature gradient can be avoided by matching the suitable materials for multidisk friction pairs. The average temperature for the case of neglecting the inertia item is lower than that of the case of including the inertia item. It is shown that during the soft-start, the temperature along the radial direction achieves its peak value near the outlet and keeps decreasing along the axial direction; while after the engaging process, the temperature distribution tends to be uniform. It is also shown that the decrease of engagement pressure, surface roughness and the ratio of inner and outer radius of disks can reduce temperature gradient effectively as well as the increase of lubricant viscosity. The average temperature for the case of including the viscosity–temperature correlation is much higher than that for other cases.

Copyright © 2014 by ASME
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References

Figures

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Fig. 1

Two-dimensional multidisk friction pairs model

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Fig. 2

Schematic diagram of HVD model for the soft-start

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Fig. 3

Mechanical load during the soft-start process

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Fig. 4

Schematic diagram of torque calculation on the disks

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Fig. 5

Schematic diagram of the heat exchange system

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Fig. 6

Overall flow chart of finite element analysis

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Fig. 7

Temperature contours of two-dimensional multidisk friction pairs at selected time intervals when neglecting the inertia item

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Fig. 8

Temperature contours of two-dimensional multidisk friction pairs at selected time intervals when including the inertia item

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Fig. 9

Temperature variations along the radial direction at selected time intervals

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Fig. 10

Temperature variations along the axial direction at selected time intervals

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Fig. 11

Effect of engagement pressure on temperature variations

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Fig. 12

Effect of oil viscosity on temperature variations

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Fig. 13

Effect of viscosity–temperature correlation on temperature variations

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Fig. 14

Effect of surface roughness on temperature variations

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Fig. 15

Effect of the ratio of inner and outer radius temperature variations

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