摘要
为降低锻压过程中的能量损耗,设计了最大输出压力为25 MN的锻压机液压系统,介绍了单电机驱动的并联双泵液压站,设计了基于双向液压缸的连续增压回路,并进行了设计计算和仿真,完成了基于S7-200smart系列PLC及模拟量扩展模块的控制系统设计。利用AMESim软件建立了并联双泵液压站、连续增压回路和锻压机液压系统模型,并分别对其进行了仿真分析。结果表明:当液压站输出压力升高至4.9 MPa时,通过低压大流量泵卸荷来减小液压站的输出流量,避免了电机过载和溢流损耗;分别设定液压站的不同输出压力值,得到液压站和液压缸上腔的压力值,增压比的计算值均在4左右,与设计增压比k=4基本吻合,增压效果明显,并且在加压增压过程中最大限度地减小了溢流损耗,提高了能源的利用率,为高压液压系统的节能设计提供了参考。
In order to reduce the energy loss during the forging process,a hydraulic system of forging press with a maximum output pressure of 25 MN was designed,and a parallel dual-pump hydraulic station driven by a single motor was introduced.Then,a continuous boosting circuit based on a two-way hydraulic cylinder was designed,the calculation and simulation were conducted,and the control system based on S7-20Osmart series PLC and analog expansion module was designed.Furthermore,the models of parallel dual-pump hydraulic station,continuous boosting circuit and hydraulic system of forging press were established by software AMESim,and the simulation analysis were conducted on them respectively.The results show that when the output pressure of hydraulic station increases to 4.9 MPa,the output flow of hydraulic station is reduced by unloading of the low-pressure and large-flow pump to avoid motor overload and overflow loss.Dfferent output pressure values of hydraulic station are set respectively to obtain the pressure values of hydraulic station and the upper chamber of hydraulic cylinder.The calculated value of boost ratio is around four,which is basically consistent with the design boost ratio k=4,and the boost effect is obvious.The overflow loss is minimized during the pressurization and boosting process,and the energy utilization rate is improved,which provides a reference for energy-saving design of high-pressure hydraulic system.
作者
周鹏
Zhou Peng(Center for Research on the Preparation and Properties of New Functional Materials,Hanjiang Normal University,Shiyan 442000,China;School of Physics and Electronic Engineering,Hanjiang Normal University,Shiyan 442000,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2024年第1期189-195,共7页
Forging & Stamping Technology
基金
湖北省教育厅科学技术研究项目(B2022222)
湖北省高等学校优秀中青年科技创新团队计划项目(T2020024)
汉江师范学院教学改革研究项目(2022B17)。
关键词
锻压机
液压系统
增压回路
输出压力
增压比
forging press
hydraulic system
boost circuit
output pressure
boost ratio
