下运带式输送机断带抓捕液压缓冲系统研究
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摘要
为有效吸收下运带式输送机断带抓捕过程存在的冲击,提出了一种下运带式输送机断带抓捕液压缓冲系统,分析了系统工作原理,基于AMESim建立了系统仿真模型,仿真分析了溢流阀开启压力、液压软管通径及长度、蓄能器气囊容积及充气压力对液压缸位移及液压缸有杆腔压力的影响规律。仿真结果表明,溢流阀开启压力越大,液压缸位移越小,液压缸有杆腔压力峰值越大;液压软管通径越大,液压缸位移越大,液压缸有杆腔压力峰值越小,但当液压软管通径增大到一定程度,其对液压缸位移的影响程度减小;液压软管长度越大,液压缸位移和有杆腔压力峰值越小;蓄能器气囊容积越大,液压缸位移略有减小,液压缸有杆腔压力峰值无变化;蓄能器充气压力越大,液压缸位移略有增大,液压缸有杆腔压力峰值基本不变。
In order to effectively absorb impact existed in broken belt catch process of downward belt conveyor,a hydraulic buffer system of broken belt catch for downward belt conveyor was proposed.Working principle of the system was analyzed,and a simulation model of the system was established based on AMESim.The influences of opening pressure of relief valve,diameter and length of hydraulic hose,bladder volume and charge pressure of accumulator on displacement and rod cavity pressure of hydraulic cylinder were simulated and analyzed.The simulation results show that the larger the opening pressure of relief valve is,the smaller the displacement of hydraulic cylinder is,and the larger the rod cavity pressure peak of hydraulic cylinder is.The larger the hydraulic hose diameter is,the larger the displacement of hydraulic cylinder is,and the smaller the rod cavity pressure peak of hydraulic cylinder is.However,the influence of hydraulic hose diameter on displacement of hydraulic cylinder decreases when hydraulic hose diameter increases to a certain value.The longer the hydraulic hose is,the smaller the displacement and rod cavity pressure peak of hydraulic cylinder are.The larger the accumulator bladder volume is,the smaller the displacement of hydraulic cylinder is,and rod cavity pressure peak of hydraulic cylinder is unchanged.The larger the accumulator charge pressure is,the larger the displacement of hydraulic cylinder is,and rod cavity pressure peak of hydraulic cylinder is basically unchanged.
In order to effectively absorb impact existed in broken belt catch process of downward belt conveyor,a hydraulic buffer system of broken belt catch for downward belt conveyor was proposed.Working principle of the system was analyzed,and a simulation model of the system was established based on AMESim.The influences of opening pressure of relief valve,diameter and length of hydraulic hose,bladder volume and charge pressure of accumulator on displacement and rod cavity pressure of hydraulic cylinder were simulated and analyzed.The simulation results show that the larger the opening pressure of relief valve is,the smaller the displacement of hydraulic cylinder is,and the larger the rod cavity pressure peak of hydraulic cylinder is.The larger the hydraulic hose diameter is,the larger the displacement of hydraulic cylinder is,and the smaller the rod cavity pressure peak of hydraulic cylinder is.However,the influence of hydraulic hose diameter on displacement of hydraulic cylinder decreases when hydraulic hose diameter increases to a certain value.The longer the hydraulic hose is,the smaller the displacement and rod cavity pressure peak of hydraulic cylinder are.The larger the accumulator bladder volume is,the smaller the displacement of hydraulic cylinder is,and rod cavity pressure peak of hydraulic cylinder is unchanged.The larger the accumulator charge pressure is,the larger the displacement of hydraulic cylinder is,and rod cavity pressure peak of hydraulic cylinder is basically unchanged.
引文
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[15]王占宇,尹文军,杨寅威,等.基于AMESim的断带抓捕液压系统仿真研究[J].煤炭工程,2017,49(8):123-125.WANG Zhanyu,YIN Wenjun,YANG Yinwei,et al.Simulation and research on hydraulic system of broken belt catcher for belt conveyor based on AMESim[J].Coal Engineering,2017,49(8):123-125.
[2]张子良.钢丝绳芯输送带可视断带诊断系统的研究[J].工矿自动化,2012,38(5):19-22.ZHANG Ziliang.Research of visible belt-broken diagnosis system of steel rope core belt[J].Industry and Mine Automation,2012,38(5):19-22.
[3]白宝国.钢丝绳芯输送带在线监测系统在马脊梁煤矿的应用[J].工矿自动化,2012,38(4):76-78.BAI Baoguo.Application of on-line monitoring system of conveyor belt of steel rope core in Majiliang Coal Mine[J].Industry and Mine Automation,2012,38(4):76-78.
[4]杨会伟,陶云芳,路国运.输送带全断面断带抓捕器抓捕过程研究[J].煤炭科学技术,2016,44(10):136-140.YANG Huiwei,TAO Yunfang,LU Guoyun.Study on catching process for full section broken belt catcher of converyor belt[J].Coal Science and Technology,2016,44(10):136-140.
[5]李学伟.带式输送机断带抓捕器的应用现状与技术探讨[J].煤矿机械,2013,34(8):225-226.LI Xuewei.Application status and discussion of belt catch for broken belt conveyor[J].Coal Mine Machinery,2013,34(8):225-226.
[6]葛雨霞.带式输送机柔性断带抓捕装置的设计[J].煤矿机械,2014,35(7):13-14.GE Yuxia.Design of flexible tape-break capture device of belt conveyor[J].Coal Mine Machinery,2014,35(7):13-14.
[7]曹亚光.断带抓捕液压系统的液压冲击研究[J].机床与液压,2018,46(4):101-103.CAO Yaguang.Research on hydraulic impact of broken belt catch system[J].Machine Tool&Hydraulics,2018,46(4):101-103.
[8]杨寅威,王忠宾,司垒,等.一种下运带式输送机断带抓紧吸能装置及其吸能方法:201410224274.9[P].2015-04-08.
[9]金学良.基于AMESim的液压抗冲击系统设计与仿真[D].哈尔滨:哈尔滨工业大学,2011.
[10]张齐生,李红杰,张兴华,等.绞吸式挖泥船绞刀系统液压冲击研究[J].液压与气动,2015(3):113-116.ZHANG Qisheng,LI Hongjie,ZHANG Xinghua,et al.Hydraulic shock of cutter-suction dredger reamer system[J].Chinese Hydraulics&Pneumatics,2015(3):113-116.
[11]刘作凯,韦建军.蓄能器对一种液压系统动态特性的影响研究[J].机械设计与制造,2018(11):216-220.LIU Zuokai,WEI Jianjun.Research on the accumulator influence on the dynamic characteristics of a hydraulic system[J].Machinery Design&Manufacture,2018(11):216-220.
[12]赵卫,叶骞.新型复式皮囊蓄能器动态性能分析[J].液压与气动,2018(1):96-103.ZHAO Wei,YE Qian.Analysis of dynamic performance for new double-bladder accumulator[J].Chinese Hydraulics&Pneumatics,2018(1):96-103.
[13]李延民,李坤.防止液压冲击基本回路的特性分析[J].机床与液压,2014,42(19):149-151.LI Yanmin,LI Kun.Characteristics analysis of basic circuit of preventing hydraulic shock[J].Machine Tool&Hydraulics,2014,42(19):149-151.
[14]庞明鑫.基于AMESim的断带抓捕装置液压缸系统动态特性仿真研究[J].煤矿机械,2016,37(11):160-162.PANG Mingxin.Simulation of dynamic characteristics of hydraulic cylinder system of belt capture device based on AMESim[J].Coal Mine Machinery,2016,37(11):160-162.
[15]王占宇,尹文军,杨寅威,等.基于AMESim的断带抓捕液压系统仿真研究[J].煤炭工程,2017,49(8):123-125.WANG Zhanyu,YIN Wenjun,YANG Yinwei,et al.Simulation and research on hydraulic system of broken belt catcher for belt conveyor based on AMESim[J].Coal Engineering,2017,49(8):123-125.