摘要
惯性力对液压支架这种重型机械的稳定性的影响不容忽视。基于达朗贝尔原理建立了液压支架稳定性力学模型,采用数值计算分析了支架静态稳定性和动态稳定性的影响因素,给出了增加支架稳定性的方案,对优化方案进行了验证。结果表明:顶梁质心位置对支架稳定性的影响最为明显,其他因素依次为掩护梁质心位置、前连杆质心位置、后连杆质心位置、支架高度;顶梁和掩护梁质心位置越靠近顶掩铰接点方向,越有利于支架的稳定性,但应兼顾支架的整体质心位置;前、后排立柱同时升降,且两者的加速度达到合理的匹配有助于提高支架的稳定性;采取滞后支护方式以缩短顶梁长度、立柱上腔加装单向锁和安全阀、保证系统稳压供液都能改善支架的稳定性。该研究为四柱液压支架的优化设计提供理论指导。
Effects of inertial force on stability of heavy machinery,such as,hydraulic support can’t be ignored.Here,based on D’Alembert’s principle,the stability mechanical model of a hydraulic support was established.The influence factors on the static stability and dynamic stability of the support were analyzed with numerical calculation,and the scheme to increase the support stability was deduced.The optimization scheme was verified with tests.The results showed that the top beam mass center position has the most obvious influence on the support stability,and the other factors are shield beam mass center position,front link one,rear link one and support height in turn;the closer to direction of top cover hinge joint the mass centers of top beam and shield,the more beneficial to the support stability,but the overall mass center position of the support should be taken into account;the support stability can be improved if front and rear columns rise and fall simultaneously and their accelerations match reasonably;the support stability can be improved by adopting the lagging support method to shorten top beam length,installing one-way lock and safety valve in column upper chamber and ensuring system steady pressure and liquid supply;this study can provide a theoretical guidance for optimization design of four-column hydraulic support.
作者
胡相捧
刘新华
HU Xiangpeng;LIU Xinhua(School of Mechatronic&Information Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China;Institute of Intelligent Mines and Robotics,China University of Mining&Technology-Beijing,Beijing 100083,China;Coal Mining and Designing Department,Tiandi Science&Technology Co.,Ltd.,Beijing 100013,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2021年第19期1-11,25,共12页
Journal of Vibration and Shock
基金
国家重点研发计划(2017YFC0603005)
国家自然科学基金联合基金(U1610251)。
关键词
达朗贝尔原理
四柱液压支架
稳定性
质心
加速度
D’Alembert’s principle
four-column hydraulic support
stability
mass center
acceleration
作者简介
第一作者:胡相捧,男,博士生,高级工程师,1983年生。
