轧机液压系统污染平衡机理分析及PBCC策略应用
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摘要
冷轧模拟器是模拟轧机轧制带钢试验设备,其张力液压缸存在抖动现象。根据NAS1638,检测液压油污染浓度处于7级,同时发现截止阀存在严重生锈现象,无法满足系统要求。开展液压系统污染平衡机理分析,首次提出污染平衡协同控制(Pollution Balance Collaborative Control,PBCC)策略并现场实践,同时应用统计学开展方差分析,液压缸抖动现象大幅改善,设备运行的精确性和稳定性显著提高。PBCC策略是一整套前后协调、相互统一的设备液压系统油液污染控制指导方法,可以推广到其他设备作为参考应用。
A cold rolling simulator is a simulated rolling mill strip test equipment, and there is jitter phenomenon in tension hydraulic cylinder. According to the NAS1638 standard, hydraulic oil pollution concentration is at level 7. At the same time, it is found that a shut-off valve is seriously rusted and can not meet the system requirements. We carry out analysis of the pollution balance mechanism of hydraulic system, and put forward pollution balance collaborative control strategy for the first time and practice on site. Using statistical analysis to carry out ANOVA, we make the hydraulic cylinder jitter phenomenon greatly reduce, and the accuracy and stability of equipment operation are significantly improved. The PBCC strategy is a set of collaborative and unified guiding research methods for hydraulic oil pollution control of equipment hydraulic systems, which can be extended to other equipment as a reference application.
A cold rolling simulator is a simulated rolling mill strip test equipment, and there is jitter phenomenon in tension hydraulic cylinder. According to the NAS1638 standard, hydraulic oil pollution concentration is at level 7. At the same time, it is found that a shut-off valve is seriously rusted and can not meet the system requirements. We carry out analysis of the pollution balance mechanism of hydraulic system, and put forward pollution balance collaborative control strategy for the first time and practice on site. Using statistical analysis to carry out ANOVA, we make the hydraulic cylinder jitter phenomenon greatly reduce, and the accuracy and stability of equipment operation are significantly improved. The PBCC strategy is a set of collaborative and unified guiding research methods for hydraulic oil pollution control of equipment hydraulic systems, which can be extended to other equipment as a reference application.
引文
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[2] 葛鹏飞,郑长松,马彪.液压阀污染磨损失效研究及影响因素分析[J].兵工学报,2014,35(3):298-303.GE Pengfei,ZHENG Changsong,MA Biao.Study on the Contamination Wear Failure of Hydraulic Valve and the Influencing Factors [J].Acta Armamentarii,2014,35(3):298-303.
[3] 马纪明,黄怡鸿,郭健,等.恒液压柱塞泵运动副磨损特性研究综述[J].液压与气动,2017,(8):85-94.MA Jiming,HUANG Yihong,GUO Jian,et al.Review of Wear Analyses Research for Main Moving Pairs in Hydraulic Axial Piston Pump [J].Chinese Hydraulics & Pneumatics,2017,(8):85-94.
[4] 马纪明,詹晓燕.具有随机退化特性的柱塞泵性能可靠性分析[J].机械工程学报,2010,46(14):189-193.MA Jiming,ZHAN Xiaoyan.Performance Reliability Analysis of a Piston Pump Affected by Random Degradation [J] .Journal of Mechanical Engineering,2010,46(14):189-193.
[5] GAIEWSKI D C.A Methodology for Determining Degraded Pump Performance Based on In-service Test Criteria or Data [C]//ASME 2011 Power Conference,2011,(2):255-259.
[6] LAMOUREUX B,MASSE J R,MECHBAL N.Diagnostics of an Aircraft Engine Pumping Unit Using a Hybrid Approach Based-on Surrogate Modeling [C]//2013 IEEE Conference on Prognostics and Health Management,2013:1-8.
[7] 王安麟,张小路,刘巍,等.齿轮泵轴向浮动侧板力矩平衡机制改进[J].同济大学学报:自然科学版,2013,41(10):1579-1583.WANG Anlin,ZHANG Xiaolu,LIU Wei,et al.Moment Balance Mechanism of Gear Pump’s Axial Floating Wear Plate [J].Journal of Tongji University (Natural Science),2013,41(10):1579-1583.
[8] LI Bo,FANG Liang,SUN Kun.Variance of Particle Size:Another Monitor to Evaluate Abrasive Wear [J].Tribology Letters,2014,55(3):465-472.
[9] KWON Soon-man,KIM Chang-hyun,SHIN Joong-ho.Optimal Rotor Wear Design in Hypotrochoidal Gear Pump Using Genetic Algorithm [J].Journal of Central South University,2011,18( 3):718-725.
[10] 李昳.离心泵内部固液两相流动数值模拟与磨损特性研究[D].杭州:浙江理工大学,2014.LI Yi.The Research on Numerical Simulation and Abrasion Property of Solid-liquid Two-phase-flow Centrifugal Pump [D].Hangzhou:Zhejiang Scitech University,2014.
[11] 张文龙,刘混举.悬臂式掘进机液压系统污染控制研究[J].液压与气动,2017,(1):12-16.ZHANG Wenlong,LIU Hunju.Contamination Control for Hydraulic System of Cantilever Tunneling Machine [J].Chinese Hydraulics & Pneumatics,2017,(1):12-16.
[12] 王春行.液压控制系统[M].北京:机械工业出版社,2004.WANG Chunxing.Hydraulic Control System [M].Beijing:Mechanical Industry Press,2004.
[13] 杜峰峰,王强.液压系统的污染平衡及其控制[J].机床与液压,2008,36(2):99-102.DU Fengfeng,WANG Qiang.The Contamination Balance and Control of Hydraulic Systems [J].Machine Tool & Hydraulics,2008,36(2):99-102.
[14] 庄楚强.应用数理统计基础[M].广州:华南理工大学出版社,2002.ZHUANG Chuqiang.Applied Mathematical Statistics [M].Guangzhou:South China University of Technology Press,2002.