0
Research Papers: Contact Mechanics

The Tribological Characteristics of Cu-Based Friction Pairs in a Wet Multidisk Clutch Under Nonuniform Contact

[+] Author and Article Information
Er-hui Zhao

School of Mechanical Engineering,
Beijing Institute of Technology,
5 South Zhongguancun Street,
Haidian District,
Beijing 100081, China
e-mail: zhaoerhui@yahoo.com

Biao Ma

School of Mechanical Engineering,
Beijing Institute of Technology,
Collaborative Innovation Center of
Electric Vehicles in Beijing,
5 South Zhongguancun Street,
Haidian District,
Beijing 100081, China
e-mail: mabiao@bit.edu.cn

He-yan Li

School of Mechanical Engineering,
Beijing Institute of Technology,
Collaborative Innovation Center of
Electric Vehicles in Beijing,
5 South Zhongguancun Street,
Haidian District,
Beijing 100081, China
e-mail: lovheyan@bit.edu.cn

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 15, 2016; final manuscript received April 27, 2017; published online July 21, 2017. Assoc. Editor: James R. Barber.

J. Tribol 140(1), 011401 (Jul 21, 2017) (9 pages) Paper No: TRIB-16-1387; doi: 10.1115/1.4036720 History: Received December 15, 2016; Revised April 27, 2017

This work is devoted to investigate the effects of thermal buckling on the tribological characteristics of a Cu-based wet clutch by artificially modifying friction pairs into different contact ratios. A thermal lubrication model is provided, and corresponding experiments are conducted on the wet clutch comprehensive test bench. The friction results from measurements and simulations for such modified friction pairs are analyzed. The results show that, as the contact ratio reduces, surface temperature rises obviously, and friction coefficient increases dramatically, so that local friction torque and total output torque grow significantly. In addition, the vibration of the output torque becomes more severe as the contact ratio reduces. Therefore, the nonuniform contact after thermal buckling exacerbates the friction characteristics of friction pairs severely and accelerates the failure of wet clutches.

FIGURES IN THIS ARTICLE
<>
Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic diagram of Cu-based friction pair

Grahic Jump Location
Fig. 2

Elevated temperature chamber for rotary drives

Grahic Jump Location
Fig. 3

Test samples of pin and friction disk

Grahic Jump Location
Fig. 4

Comprehensive test bench of a wet multidisk clutch

Grahic Jump Location
Fig. 5

Arrangement of thermocouples in the steel disk

Grahic Jump Location
Fig. 6

Schematic diagram of coordinate system

Grahic Jump Location
Fig. 7

Computational flowchart

Grahic Jump Location
Fig. 8

Friction plates with different contact ratios after testing

Grahic Jump Location
Fig. 9

Surface temperature rise of friction plates with different contact ratios: P = 0.5 MPa, V = 500 rpm, t = 5 s

Grahic Jump Location
Fig. 10

Test results of surface temperature rise on steel disks with different contact ratios: P = 0.5 MPa, V = 500 rpm, t = 0 ∼ 5 s

Grahic Jump Location
Fig. 11

Local friction coefficient of Cu-based friction pairs with different contact ratios: P = 0.5 MPa, V = 500 rpm, t = 5 s

Grahic Jump Location
Fig. 12

Local friction torque of Cu-based friction pairs with different contact ratios: P = 0.5 MPa, V = 500 rpm, t = 5 s

Grahic Jump Location
Fig. 13

Calculation results of wet clutch output torques with different contact ratios: P = 0.2 ∼ 0.5 MPa, V = 200 ∼ 500 rpm, t = 0 ∼ 5 s

Grahic Jump Location
Fig. 14

Test results of wet clutch output torques with different contact ratios: P = 0.2 ∼ 0.5 MPa, V = 200 ∼ 500 rpm, t = 0 ∼ 5 s

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In