Study on friction mechanism and performance of disc brakes for mining motor vehicle
Yanan Qin1 , Sen Zhang2 , Xiuping Wei3
1, 2, 3Binzhou University, Binzhou, China
Mathematical Models in Engineering, Vol. 4, Issue 1, 2018, p. 11-17.
Received 26 January 2018; accepted 2 February 2018; published 31 March 2018
According to the convexity theory, the working principle of the disc brake of mining motor vehicle is analyzed. The dry friction force between brake disc and brake block is mainly composed of three mechanisms, such as meshing effect, adhesion effect and furrow effect. The Link NVH 3900 device is used to simulate the long downhill braking condition with bench test method, which can obtain friction performance with high credibility in different brake conditions. The average friction coefficient and friction stability coefficient are chosen as the evaluation parameter for friction performance judgment. Through the research results, it can be known that the average friction coefficient of the brake decreases linearly with brake pressure increases, the friction stability coefficient under different braking pressure showed numerically larger and smaller fluctuations. When the temperature of disc surface exceeds 200 °C, the resin lubricating film will be produced in the brake block, which will decrease the friction coefficient obviously. The actual braking torque does not increase linearly with the increase of braking pressure, especially when the brake speed is high, the friction coefficient will decrease obviously.
Keywords: friction performance, brake; mining motor vehicle, friction coefficient, friction stability coefficient.
- Cuisu K., Fenfen L. Design of brake test bed for mine motor vehicle. Coal Mine Machinery, Vol. 31, Issue 8, 2010, p. 160-161. [CrossRef]
- Xiandong L., Zengjie R. Test and analysis of friction characteristics and brake scream of disc brake. Vibration Test and Diagnosis, Vol. 33, Issue 5, 2013, p. 746-750. [CrossRef]
- Xiangzhou Q., Haixin T. Research on transportation brake system based on coal mine motor vehicle. Engineering Technology: Digest Version, Vol. 44, Issue 5, 2016, p. 318. [CrossRef]
- Rong F., Fei G., et al. Tribological behavior of copper based composites under dry and wet conditions. Journal of Composite Materials, Vol. 27, Issue 1, 2010, p. 79-85. [CrossRef]
- Zhendong D., Qunji X. Thermodynamic study of friction and wear: current situation and prospect. Chinese Science: Technical Science, Vol. 39, Issue 7, 2009, p. 1211-1215. [CrossRef]
- Dengfeng W., Yuwei., Haitao H. Finite element analysis and test of brake scream of disc brake. Automobile Engineering, Vol. 29, 8, p. 705-709. [CrossRef]
- Junwang D., Pingping Y., Xiang X. Effect of pressure on friction and wear properties of space docking friction materials. Nonmetallic Ore, Vol. 29, Issue 5, 2006, p. 59-62. [CrossRef]