拔长工艺中锻造操作机液压系统能耗分析
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摘要
扩展了锻造操作机整机的能量流模型和能耗计算模型,研究了拔长工艺下锻造操作机液压系统的控制特性和能耗特性,得出了液压系统的能耗分布规律,分析了能量浪费的关键环节,为锻造操作机液压控制系统的优化以及节能控制方法的提出提供指导。研究结果表明,锻造操作机液压系统的能耗特性具有如下特点:夹钳上升和旋转动作的能量传递效率较高,均可达60%以上;大车行走动作的能量传递效率仅为17%;夹钳下降时重力势能几乎全部转化为升降控制阀的节流损失;多执行器不同负载与单压力源不能合理匹配会造成巨大的节流损失。
For the purposes of providing guidance for optimization of hydraulic control systems and energy saving control methods for forging manipulators,the model of energy flow and calculation model of energy for forging manipulators were extended,and the control characteristics and energy dissipation characteristics of forging manipulator hydraulic systems were analyzed under stretching processes.The distribution laws of energy dissipation in hydraulic systems were found out,and the key points of low energy efficiency were analyzed.The results show that the energy dissipation characteristics of the forging manipulator hydraulic systems have following features.The energy transfer efficiency of clamp lifting and rotation may be higher than 60%.The energy transfer efficiency of walking motion of cart is only 17%.When the clamp drops,the gravitational potential energy is almost converted to the throttling losses of the lift control valves.If single system pressure driving mode does not match different loads of multi actuator reasonably,there will be huge throttling losses.
For the purposes of providing guidance for optimization of hydraulic control systems and energy saving control methods for forging manipulators,the model of energy flow and calculation model of energy for forging manipulators were extended,and the control characteristics and energy dissipation characteristics of forging manipulator hydraulic systems were analyzed under stretching processes.The distribution laws of energy dissipation in hydraulic systems were found out,and the key points of low energy efficiency were analyzed.The results show that the energy dissipation characteristics of the forging manipulator hydraulic systems have following features.The energy transfer efficiency of clamp lifting and rotation may be higher than 60%.The energy transfer efficiency of walking motion of cart is only 17%.When the clamp drops,the gravitational potential energy is almost converted to the throttling losses of the lift control valves.If single system pressure driving mode does not match different loads of multi actuator reasonably,there will be huge throttling losses.
引文
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[2] HO T H,AHN K K.Design and Control of a Closed-loop Hydraulic Energy-regenerative System[J].Automation in Constrution,2012,22(4):444-458.
[3] YOON J I,KWAN A K,TRUONG D Q.A Study on an Energy Saving Electro-Hydraulic Excavator[C]//2009ICCAS-SICE.Fukuoka,2009:3825-3830.
[4] LI X,LUO W,YANG X,et al.Research on Energy-saving Control for Hydraulic Excavators Based on FNN[C]//2010International Conference on Measuring Technology and Mechatronics Automation.Changsha,2010:66-69.
[5]何春栋.200kN正弦泵控操作机机液系统联合仿真及节能特性研究[D].秦皇岛:燕山大学,2010.HE Chundong.Mechanical and Hydralic System Co-simulation and Energy Saving Character Research on 200kN Sine Pump Controling Forging Manipulator[D].Qinhuangdao:Yanshan University,2010.
[6]武宏伟,权龙.负载敏感型挖掘机液压系统能耗分析[J].液压气动与密封,2009,28(6):34-39.WU Hongwei,QUAN Long.Energy Loss Research of Load-sensing Excavator’s Hydraulic System[J].Hydraulics Pneumatics&Seals,2009,28(6):34-39.
[7] BJORN E,MARCUS R,JAN-OVE P.Energy Saving System Utilizing LQ-technique Design[C]//The 7th International Conference on Fluid Power Transmission and Control.Hangzhou,2009:40-41.
[8] BJORN E.Control Strategy for Energy Efficient Fluid Power Actuators:Utilizing Individual Metering[D].Link9ping:Link9ping University,2007.
[9]黄新年,张志生,陈忠强.负载敏感技术在液压系统中的应用[J].流体传动与控制,2007,34(5):28-30.HUANG Xinnian, ZHANG Zhisheng, CHEN Zhongqiang.Application of Load Sensing Technique in Hydraulic Systems[J].Fluid Power Transmission and Control,2007,34(5):28-30.
[10]景俊华.负载敏感系统的原理及其应用[J].流体传动与控制,2010(6):21-24.JING Junhua.Principle and Aplications of Loadsensing System[J].Fluid Power Transmission and Control,2010(6):21-24.
[11] ZHAO K,LIU Z,YU S,et al.Analytical Enegy Dissipation in Large and Medium-sized Hydraulic Press[J].Journal of Cleaner Production,2015,103:908-915.
[12]郭悦.阀控油压机快锻液压系统能耗机理及节能控制研究[D].秦皇岛:燕山大学,2014.GUO Yue.Research on the Energy Consumption Mechanism and Energy-saving Control of Fast Forging Hydraulic System in Valve-control Press[D].Qinhuangdao:Yanshan University,2014.