切割摆动辊系统液压缸抖动故障分析及解决方案  

Fault analysis and solution of hydraulic cylinder jitter in cutting swing roller system

作　　者：韩钰 李颖 邹炳燕 艾同辉 HAN Yu;LI Ying;ZOU Binyan;AI Tonghui(Basic Experimental and Training Center,Tianjin Sino-German University of Applied Sciences,Tianjin 300350,China;Tianjin HANFOOK Precision Hydraulic Technology Co.,Ltd.,Tianjin 300350,China)

机构地区：[1]天津中德应用技术大学基础实验实训中心,天津300350 [2]天津瀚福精密液压技术有限公司,天津300350

出　　处：《机电工程》2025年第2期298-306,共9页Journal of Mechanical & Electrical Engineering

基　　金：天津市科技创新专项资金资助项目(20YDTPJC01940)。

摘　　要：为解决某钢厂切割摆动辊系统中液压缸的抖动问题,对该系统使用的内泄式液控单向阀进行了研究,并给出了增加减压阀或采用外泄式液控单向阀两种解决方案。首先,分析了该液压系统的工作原理,推导了内泄式液控单向阀即将反向开启和维持反向开启的条件;然后,采用AMESim仿真软件搭建了内泄式液控单向阀及切割摆动辊液压系统的仿真模型,对液控单向阀的阀芯位移、液压缸受力等情况进行了仿真分析;最后,在实验室模拟了该液压系统,分别对不带卸荷阀芯和带卸荷阀芯两种结构的内泄式液控单向阀进行了实验验证;并提出了增加减压阀和改用外泄式液控单向阀两种解决方案。研究结果表明:如不满足维持反向开启的条件,内泄式液控单向阀会反复启闭,导致液压缸抖动;实验中液控单向阀A口流量在0.5 L/min~4.5 L/min之间剧烈变化;但采用减压阀将无杆腔压力降至27.5 bar后,液压缸平稳下降;而外泄式液控单向阀只要反向开启就能维持开启,实验中液控单向阀A口流量稳定在0.65 L/min,液压缸平稳运行,切割摆动辊系统采用减压阀消除了液压缸抖动。以上结论可为液控单向阀的工程实际应用提供理论依据。To solve the problem of hydraulic cylinder shaking in the cutting swing roller system of a steel plant,a detailed study was conducted on the pilot operated check valve without drain port used in the system.Two solutions were given:adding a pressure reducing valve or adopting a pilot operated check ralve with drain port.Firstly,the working principle of the hydraulic system was analyzed,and the conditions for the reverse opening and maintenance of the pilot operated check valve without drain port were derived.Secondly,a simulation model of the pilot operated check valve without drain port and hydraulic system for cutting swing roller was built using AMESim simulation software,and the displacement of the valve poppet and the force on the hydraulic cylinder were simulated and analyzed.Finally,the hydraulic system was simulated in the laboratory,and experimental verification was carried out on two structures of pilot operated check valves without drains port,one without pre-opening structure and the other with pre-opening structure.Two solutions were proposed,adding pressure reducing valves and switching to pilot operated check valve with drain port.The research results indicate that if the conditions for maintaining reverse opening are not met,the pilot operated check valve without drain port will repeatedly open and close,causing hydraulic cylinder shaking.In the experiment,the flow rate at A port of the pilot operated check valve changes dramatically between 0.5 L/min and 4.5 L/min.However,after using a pressure reducing valve to reduce the rodless chamber pressure to 27.5 bar,the hydraulic cylinder descends smoothly.The pilot operated check valve with drain port can maintain its opening as long as it is opened in reverse.In the experiment,the flow rate at port A of the pilot operated check valve remaines stable at 0.65 L/min,and the hydraulic cylinder operates smoothly.The cutting swing roller system uses a pressure reducing valve to eliminate hydraulic cylinder shaking,and the above conclusion can provide theoret

关 键 词：切割摆动辊系统 液压缸抖动 内泄式液控单向阀 外泄式液控单向阀 液控单向阀反向开启 减压阀 卸荷阀芯 

分 类 号：TH137[机械工程—机械制造及自动化]