TY - JOUR
TI - Thermal behavior of double arc groove friction pairs in hydro-viscous drive under soft start-up condition
AU - Wang Qiliang
AU - Cui Hongwei
AU - Lian Zisheng
AU - Li Long
JN - Thermal Science
PY - 2019
VL - 23
IS - 2
SP - 835
EP - 847
PT - Article
AB - Three-dimensional transient heat conduction equations with boundary-value  problems were established for numerical simulation to explore the thermal  behavior of double arc groove friction pairs. The heat flux of the contact  face decelerated with time, and its distributions were formulated with  intensity proportional to the thermal parameters of the materials.  Additionally, the theoretical expression of the friction disc’s speed was  deduced. Subsequently, a numerical solution was obtained using the finite  difference method to predict the temperature field distributions of the  friction pairs and to determine the location of the maximum temperature under  different start-up times. The results indicate that the friction disc and  steel disc are approximately similar regarding the temperature field  distributions. However, the temperature and radial temperature gradient of  the latter are several times those of the former. The central region  temperatures for each rhombus at the surface of the friction disc are higher  than those of the surrounding area. The longer the time to soft start-up is,  the higher is the generated temperature, and the greater is the radial  temperature gradient. The analysis results provide theoretical reference and  technical support for the selection of the start-up time by considering the  actual working conditions of scraper conveyor.