Design and simulation of hoist's over release fixed-length hydraulic buffer system
Since the hoist skip's over release buffer displacement is greatly affected by the over release working conditions,a hoist's over release fixed-length buffer system is proposed in this article.The fixed-length buffer principle is explored,the max-imum buffer capacity of the hoist's over release fixed-length buffer system is calculated.AMESIM is used to set up the simulation model of the hoist's over release fixed-length buffer system.The simulation research is carried out with linear reduction of throttle valve opening;The fixed-length buffer performance with initial parameters is worked out.Efforts are made to simulate and analyze the effects of the over release mass and speed on the skip's buffer displacement and buffer speed as well as the hydraulic cylin-der's buffer chamber pressure.The results show that the hoist's over release fixed-length buffer system ensures controllable buff-er displacement.The error between the skip's buffer displacement and the set value is 1％.During the ever-changing over release mass and speed,the skip's buffer displacement remains 0.1 m.When the fixed-length buffer system reaches the maximum buffer capacity,the skip's buffer displacement and buffer speed as well as the hydraulic cylinder's buffer chamber pressure begin to fluctuate obviously.This study provides theoretical guidance for research and development of the hoist's over release fixed-length buffer system.
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