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Hydraulic servo system has the characteristics of large power, fast response and high precision, in which the hydraulic roll gap automatic control system, namely AGC system, is the typical representative of hydraulic technique application in all metallurgical equipment. The stability of system back pressure plays the key role in the action of hydraulic cylinder and the precise control of valve in AGC system, and through the transformation for oil supply way of system back pressure, from the valve relief for oil supply to the pump for direct transformation, makes back pressure is more stable in use.

, authors=Jun-lan SUN¹, Hao HU², Wei-ping WANG², authorsList=Jun-lan SUN, Hao HU, Wei-ping WANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1319263278463832145, articleId=1319263276693835855, tenantId=1146029695717560320, journalId=1185652524569653253, language=CN, title=轧机AGC液压系统中背压的改进, columnId=1185882040256840459, journalTitle=包钢科技, columnName=设备与自动化, runingTitle=null, highlight=null, articleAbstract=

液压伺服系统以其功率大、响应快、精度高的特点，其中液压自动控制辊缝系统，即AGC系统是所有冶金设备中液压技术应用的典型代表，系统背压的稳定性，对AGC系统中液压缸动作、阀的精准控制起关键性作用，通过对系统的背压供油方式从阀减压供油改为泵直供的改造，让背压在使用中更加稳定。

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孙俊兰（1971-），女，内蒙古包头市人，高级讲师，现从事机械教学工作。

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孙俊兰（1971-），女，内蒙古包头市人，高级讲师，现从事机械教学工作。

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