Study on characteristics of external load of transmission system for cutting unit of shearer under multiple load cases
Yong Wang1, 2, Dongye Sun1, Changzhao Liu1
COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12D) 326-330
1The State Key Laboratory of Mechanical Transmission, Chongqing University, Chong Qing, China
2Dept. of Automotive Eng., Chongqing College of Electronic Engineering, Chong Qing, China
To improve the accuracy of dynamics analysis, anti-fatigue design and reliability calculation of transmission system for cutting part of shearer, the accurate external load model of transmission system for cutting unit is required to be firstly built. In this study, the system dynamics model of cutting unit including drum, transmission system and motor is built, the impact of drum load and motor on external load of transmission system is comprehensively considered, and external load characteristics of transmission system during tilt and straight cutting of front and rear drums are studied, when the model is built, the impact of changes in the actual attack angle caused by the axial tilt angle on the cutting resistance is considered. The case analysis is conducted with this model, and the impact of changes in the actual attack angle caused by the axial tilt angle on the cutting resistance is mainly considered, the result shows that: during tilt cutting, the external load acting on the transmission system gradually increases and the fluctuation range also increases; while during straight cutting, the external load acting on the transmission system remains stable; the load of transmission system of front cutting unit is worse than that of transmission system of back cutting unit.