Author:
Sun Xianguang,Xin Xicheng
Abstract
Purpose
The purpose of this study is to establish a fractal model of thermal contact conductance (TCC) of micro-segment gear considering friction coefficient.
Design/methodology/approach
The influences of friction coefficient, fractal dimension, fractal roughness and contact type on the TCC of the rough surface were studied by using numerical simulation.
Findings
The results show that with the increase of the friction coefficient, the TCC of the rough surface will decrease. As the fractal dimension increases or the fractal roughness decreases, the rough surface becomes smoother and the TCC becomes larger. Under the same load conditions, the TCC of the internal contact type is greater than that of the external contact type. In engineering practice, the desired TCC can be achieved by changing the contact type.
Originality/value
A fractal model of TCC of micro-segment gear considering friction coefficient was established in this study. The achievements of this study provide some theoretical basis for the investigation of the TCC of the gear.
Subject
Surfaces, Coatings and Films,General Energy,Mechanical Engineering
Reference30 articles.
1. Thermal contact conductance of elastically deforming nominally flat surfaces using fractal geometry;Industrial Lubrication and Tribology,2013
2. Using metallic coatings to enhance thermal contact conductance of electronic packages;Heat Transfer Engineering,1988
3. Chen, Q. (2010), “Research on gear contact strength analysis of automobile gearbox by fractal theory”, PhD Thesis, Hefei University of Technology, Hefei.
4. Fractal prediction model of thermal contact conductance of rough surfaces;Chinese Journal of Mechanical Engineering,2013
5. An analytical model of thermal contact resistance based on the Weierstrass–Mandelbrot fractal function;Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science,2010