第52卷第10期 2016年5月
机械工程学报
JOURNALOFMECHANICALENGINEERING
DOI:10.3901/JME.2016.10.199
Vol.52 May
基于两级压力源的液压机快锻节能控制研究
李彬3孔祥东1,2,3
姚静1,2,32
(1.燕山大学河北省重型机械流体动力传输与控制实验室秦皇岛
066004
2.燕山大学先进制造成形技术及装备国家地方联合工程研究中心秦皇岛066004
3.燕山大学机械工程学院秦皇岛066004)
No.10 2016
摘要：针对传统电液比例阀控快锻液压机系统功率浪费严重的间题，采用四象限负载轨迹分析方法，对其快锻工况下能量分配及流动情况进行研究，得到不同执行器的负载特性，并以满足不同执行器的负载匹配为目标，同时兼顾快锻过程中的能量回收及再利用，提出一种基于两级压力源的新型液压机快锻节能系统。研究两级压力源的参数设计及匹配间题，给出两级压力源构成元件的模型和参数计算方法。采用功率键合图的建模方法，建立快锻液压机系统的数学模型，对两级压力源快锻液压机系统的功率流进行伤真分析：基于0.6MN液压机试验台，对该快锻系统的控制和节能特性进行试验验证。结果表明，基于两级压力源的新型液压机快锻系统加载时控制精度达到1.5mm，有用功提高至24.4%。与传统的电液比例阅控系统和采用蓄能器的液压机快锻系统相比，该系统不仅满足了不同执行器的负载匹配需求，而且具其有能量存储和再利用的功能，大大降低了装机功率和节流损失，且实现了零溢流。
关键词：两级压力源；锻造液压机：节能：蓄能器中图分类号：TH137
EnergySavingand Control ofHydraulicPressFastForgingSystem
BasedontheTwo-stagePressureSource YAO Jing,*2.3 LI Bin’KONG Xiangdong*.23
(1. Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control)
Yanshan University, Qinhuangdao 066004;
2. National and Local Joint Engineering Center for Advanced Forging Press Forming Technology and Equipment,
Yanshan University, Qinhuangdao 066004;
3. School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004)
Abstract: The poor energy efficiency is a big issue in the conventional electro-hydraulic proportional valve controlled fast forging system due to the huge throttling losses and overflow losses. Aimed to address this problem, the energy flow distribution of fast forging process is obtained by adopting the load force and velocity analysis method of duty cycle. Through analyzing the energy flow of the different actuators, at the same time considering the load match of the different actuators and energy storage and regeneration, a novel energy-saving fast forging system schematic of two-stage pressure source is proposed. The rules of two-stage pressure's parameters design and match are formulated, giving the key components model and parameters computing method. Adopting the method of power band graphs, the mathematical model of fast forging system based on two-stage pressure is found to simulate and analyze the power flow. In order to validate the control and energy- saving characteristics, the test is carried on using the 0.6 MN hydraulic forging press platform and the results show that the displacement control precision of this new system based on two-stage pressure source is 1.5 mm and the useful work rate of the new system is improved to 24.4%. What is more significant is that compared with the traditional electro-hydraulic proportional valve controlled system and fast forging hydraulic press with accumulator system, this new system not only greatly reduces the installed power and throttling loss, but also makes zero overflow possible.
Key words: two-stage pressure source; forging hydraulic press; energy-saving: accumulator
前言 0
液压机是工业生产中必不可少的工作母机，广
+国家自然科孕基金(51575471)和燕山大孕青年教师自主研究计划课题理工A炎(14LGA006)资助项目，20150626收到初稿，20151214收到修改障
泛应用于航空航天、舰船、核电以及能源等领域的装备制造中，具有明确的战略意义[1-2]。阀控系统是锻造液压机液压控制系统中历史最为悠久，应用最为广泛的系统形式。随着电液比例技术的应用，这类系统很好地实现了压机平稳、快速、准确控制，然而传动效率低却始终困扰着这类系统"。
近几年，有关锻造液压机液压控制系统(阀控系