摘要
基于断带发生机理,提出了断带抓捕装置的基本设计原则,提出用差动回路控制差动缸对输送带进行快速压射抓捕,液压泵仅在差动缸缩回时工作,蓄能器存储保压和抓捕过程的能量。本系统在保证压射回路抓捕速度的同时,降低了设备成本,使液压控制系统功率由11 k W降低到7.5 k W,达到了节能的效果。通过对液压压射回路的仿真和试验研究表明,在一定的管路和系统压力下,蓄能器充液体积在满足差动缸需求的前提下,蓄能器的充气压力对抓捕速度几乎不产生影响;而在蓄能器充气压力一定时,液压系统的额定压力越大,抓捕速度越快,即抓捕时间越短。
On the basis of belt breaking mechanism, the general principle of designing the broken-belt catcher was put forward, and differential circuit was applied to control the differential cylinder so as to rapidly inject and catch the conveyance belt. The hydraulic pump worked only at the time of the differential cylinder retracting, and the accumulator stored the energy during pressure-holding and catching process. In the premise of the catching speed of the injection circuit being guaranteed, the system was contributive to decrease of equipment cost, which brought about the power of the hydraulic control system decreased from 11 k W to 7.5 k W, thus the energy-saving effects were obtained. The simulation results and test study on the hydraulic injection circuit showed: in the case of a fixed pressure of pipeline and system, in the premise of the volume of the charging liquid in the accumulator satisfying the demand of the differential cylinder, the charging pressure of the accumulator had little impact on the catching speed; while in the case of a fixed charging pressure of the accumulator, the greater the rated pressure of the hydraulic system was, the higher the catching speed was, that was the shorter the catching duration was.
出处
《矿山机械》
2015年第5期65-70,共6页
Mining & Processing Equipment
基金
新世纪优秀人才支持计划资助项目(NCET-12-1038)
山西省回国留学人员科研资助项目(2013-重点4)
山西省高等学校优秀青年学术带头人资助项目(20120428)
关键词
断带抓捕
压射回路
蓄能器
快速抓捕
broken-belt catching
injection circuit
accumulator
rapid catching
