摘要
针对现有设备无法实现对冲击地压矿井防冲支架进行静-动复合动力冲击加载实验的问题,提出一种基于液压蓄能及快放原理实现大吨位快速静-动复合加载的动力冲击试验机设计方法。提出了加载试验机的结构组成及工作原理,设计了液压加载系统,并给出液压加载系统的工作原理。该试验机能够实现被压试件的准静态加载、动态加载和静-动复合加载。运用AMESim软件建立了液压加载系统的仿真模型,对其加载特性进行了仿真分析;提出了一种实现高压超大流量开关阀的新型结构,运用FULUNET软件对超大流量开关阀进行了结构优化与流场研究,确定了额定压力31.5 MPa,流量达到120000 L/min的超大流量阀的结构参数;推导了防冲液压立柱的冲击波动方程及其定解条件;建立了液压动力加载系统的AMESim仿真模型,并进行了动力冲击仿真分析。根据理论分析结果完成了6500 kN高速液压冲击实验机样机的研制,并对样机进行了实验测试,实验结果表明,该试验机最大冲击力为6500 kN,最大冲击速度8.2 m/s,从静止到最大速度加速时间小于25 ms,超大流量开关阀的额定流量达到了121179.8 L/min,开启时间小于15 ms。通过对实验样机的实验,验证了设计方案的正确性。
Aiming at the problem that the existing test equipment can’t perform the static-dynamic combined dynamic impact loading test on the anti-impact bracket in the rock burst mine,this study has developed a dynamic impact test bench to realize large-tonnage fast static-dynamic combined loading based on the principle of hydraulic energy storage and fast discharge.The structure and working principle of the loading test bench were proposed,its hydraulic loading system was designed,and the action principle of the hydraulic loading system was given.The quasi-static loading,dynamic loading and static-dynamic combined loading of the test piece could be realized on the bench.The simulation model of the hydraulic loading system was established,and its loading characteristics were simulated using AMESim.A new structure of switch valve was proposed to realize the high pressure and large flow.The structure optimization and flow field research of the ultra-high-flow fast-release valve was performed using FULUNET.The structural parameters of the valve with a rated pressure of 31.5 MPa and a flow rate of 120000 L/min were determined.The shock wave equation of the anti-impact hydraulic column and its definite conditions were deduced.The AMESim simulation model of the hydraulic power loading system was established and the dynamic impact simulation analysis was performed.Based on the results of theoretical analysis,the prototype of the 6500 kN high-speed hydraulic impact test bench had been developed and tested.The experimental results show that the test bench has a maximum impact force of 6500 kN and a maximum impact speed of 8.2 m/s.The acceleration time from static to maximum speed is less than 25 ms,the rated flow rate of the ultra-high-flow fast-release valve reaches 121179.8 L/min,and the opening time is less than 15 ms.The correctness of the design scheme was verified by experiments on a prototype test machine.
作者
张建卓
王洁
潘一山
齐庆新
王爱文
王洪英
ZHANG Jianzhuo;WANG Jie;PAN Yishan;QI Qingxin;WANG Aiwen;WANG Hongying(College of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China;School of Environment,Liaoning University,Shenyang 110136,China;Deep Mining and Rockburst Branch,China Academy of Coal Science,Beijing 100013,China;School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China;Beijing Chengtian Hengye Coal Mine Equipment Co.,Ltd.,Beijing 102308,China)
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2020年第5期1648-1658,共11页
Journal of China Coal Society
基金
国家重点研发计划资助项目(2017YFC0804205)
国家自然科学基金面上资助项目(51574140)
新疆维吾尔自治区高层次人才引进工程(柔性人才)支撑计划资助项目。
关键词
防冲支架
冲击试验机
液压加载
静载加载
静-动复合加载
anti-impact bracket
impact test bench
hydraulic loading
static loading
static-dynamic combined loading
