Overload protection characteristics of cylindrical friction torque limiter in heavy scraper conveyor
Scraper conveyor is the core equipment of fully mechanized mining face.Due to the poor working environment and complex working conditions,faults such as chain stuck and chain broken often occur frequently.The cylindrical friction torque limiter can be used to prevent such faults,which has the advantages of compact structure,precise slip,and fast recovery and high reliability.In order to explore the overload protection performance of the cylindrical friction torque limiter,the whole scraper conveyor model was established with AMESim,and the torque limiter skid control model was built by Matlab/Simulink for co-simulation.The overload protection characteristics of the cylindrical friction torque limiter under impact and stuck chain conditions were studied.The overload protection effect of scraper conveyor was analyzed with torque limiter installed at different positions.The results show that under the impact and chain clamping conditions,due to the friction slip of the torque limiter,the force of the scraper conveyor protected by the torque limiter is relatively stable without sudden increase,and the isolation peak load of the torque limiter is significant.When the torque limiter arranged in the middle of the reducer,the protection effect for the scraper conveyor and its driving system is optimal.
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