带式输送机断带抓捕装置缓冲系统制动性能研究

Research on Braking Performance of the Buffer System of the Broken Belt Catching Device for Belt Conveyors

文章针对断带抓捕装置沿线布置问题,提出一种将溢流阀和液压锁叠加集成缓冲液压缸的带式输送机断带抓捕装置液压缓冲系统。通过对现有带式输送机断带抓捕缓冲系统进行优化改进,合理选用并建立了皮带弹性阻尼模型;再基于AMESIM软件准确搭建了系统仿真模型,以此分析了溢流阀开启压力及不同液压缸尺寸参数对系统制动时间,输送带制动位移、速度及缓冲液压缸制动力的影响;针对缸径、杆径较大的缓冲液压缸,可通过减小溢流阀的设定压力进行制动性能优化。研究结果表明,溢流阀设定压力增加时,输送带制动位移减小,且制动时间逐渐缩短,当缓冲液压缸缸径选取100 mm、杆径选取70 mm时,溢流阀的最小设定值约为15 MPa。

Considering the layout of the broken belt catching device along the line,a hydraulic buffering system for the broken belt catching device of a belt conveyor is proposed,which integrates the overflow valve and hydraulic lock into a buffering hydraulic cylinder.The existing broken belt catching and buffering system of the belt conveyor is optimized and improved,and a belt elastic damping model is reasonably selected and established.A system simulation model is accurately built based on AMESIM.The influence of the overflow valve opening pressure on the system braking time,the conveyor belt braking displacement,speed,acceleration and the braking force of the buffer hydraulic cylinder are analyzed.For the buffering hydraulic cylinders with larger cylinder diameter and rod diameter,the braking performance is optimized by reducing the set pressure of the relief valve.The research results show that as the set pressure of the relief valve increases,the braking displacement of the conveyor belt decreases,and the braking time gradually shortens.When the cylinder diameter of the buffering hydraulic cylinder is 100 mm and the rod diameter is 70 mm,the minimum set value of the relief valve is about 15 MPa.