提升机过放被动式吸能系统设计与仿真

Design and simulation on passive energy absorption system of hoist over-discharge

针对提升机过放箕斗的强冲击问题,对提升机过放吸能系统进行了研究。提出并设计了一种提升机过放被动式液压吸能系统,对吸能缸关键参数进行了计算,利用AMESIM软件对提升机过放被动式吸能系统仿真模型进行了搭建,初始参数下仿真得到了箕斗速度位移和吸能缸缓冲腔压力流量特性曲线,分析研究了不同吸能缸活塞直径、溢流阀通径和弹簧压缩量对箕斗位移及吸能缸缓冲腔压力的影响规律。研究结果表明:在箕斗不撞缸的前提下,较小的吸能缸活塞直径、较大的溢流阀通径和较小的溢流阀压缩量有利于降低吸能缸缓冲腔压力峰值,并增大被动式吸能系统有效吸能量。

Aiming at the problem of the strong impact of hoist over discharge skip,the over-discharge energy absorption system of hoist was studied.A passive hydraulic energy absorption system was proposed and designed.The key parameters of energy absorption cylinder were calculated.The simulation model of over-discharge passive energy absorption system of hoist was built by AMESIM.The velocity displace-ment of skip and pressure-flow characteristic curves on buffer chamber of energy absorption cylinder were obtained by simulation under initial parameters.The influence of piston diameter,relief valve diameter and spring compression on skip displacement and pressure on buffer chamber of energy absorption cylinder was studied.The results indicate that on the premise of the skip not hitting cylinder,smaller piston di-ameter of energy absorption cylinder,larger relief valve diameter and smaller relief valve compression are beneficial to reducing the peak pressure on buffer chamber of the energy cylinder and increasing the effective energy absorption of the passive energy absorption system.