关键词: 限矩器, 柱面摩擦副, 有限元法, 热力耦合

Abstract: To remedy the low reliability and short lifespan caused by poor overload protection performance of scraper conveyors of fully mechanized working faces in coal mines, a new type of high-power density cylindrical friction torque limiter is proposed. A thermal coupling model of cylindrical friction pairs is built by employing ABAQUS to study the changes in temperature and stress fields of cylindrical friction pairs during sliding. The direct coupling method is used to analyze the temperature and stress fields of the copper sleeve and bushing of the friction pair under different loads and working conditions. The results reveals that, the temperature and stress of the copper sleeve and bushing of the friction pair increase continuously with sliding time under continous sliding conditions. There is a maximum stress concentration at the edge of the copper sleeve contact surface, while the stress of the copper bushing experiences alternating changes. Under slip-synchronous working conditions, the stress and temperature of the friction pair decrease gradually as the slip stops. Under both operating conditions, the temperature of the friction pair increases with the rise of the applied load. The study can provide a theoretical basis for the optimized design and prediction of the fatigue life of cylindrical friction torque limiter.