基于AMESim预塑背压阀的压力特性研究  

Study of Pressure Characteristics of Pre-plastic Back Pressure Valves Based on AMESim

作　　者：刘立柱 高杰林 高世权 王兴天 庄俭[2] LIU Lizhu;GAO Jielin;GAO Shiquan;WANG Xingtian;ZHUANG Ji an(Haitian Plastics Machinery Group Co, Ltd, Ningbo 315801, China;College of Mechanical and Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]海天塑机集团有限公司,浙江宁波315801 [2]北京化工大学机电工程学院,北京100029

出　　处：《中国塑料》2017年第12期101-106,共6页China Plastics

摘　　要：以注塑机液压系统中背压回路为研究对象,利用AMESim软件搭建模型,通过改变溢流阀阻尼孔以及改善溢流阀阻尼配比,数值模拟背压阀中不同弹簧刚度、有无阻尼孔以及不同阻尼孔大小条件下先导阀与主阀压力变化情况。结果表明,适当的减小先导阀的弹簧刚度可以改善预塑背压系统中压力上升的问题;当阻尼孔直径由2 mm减小到0.5mm时,预塑背压阀上、下腔的压力变化均在0.02 MPa以内,且没有压力上升的趋势,可通过改变增加阻尼提高液压控制系统的稳定性。This paper studied the back-pressure loops in the hydraulic system of an injection molding machine, and several models were established by an AMESim software through changing thedamping hole and the damping ratio of relief valves. The back pressures of the pilot valve and main valve were analyzed under different conditions, which included spring stiffness, damping holes and its sizes. The simulation results indicated that a proper reduction in spring ratcould reduce the rise of pressure in the pre-plastic back pressure system. When the diameter damping orifice was reduced from 2 mm to 0. 5 mm, the pressures of the upper and lower chambers in the pre-plastic back pressure valve varied within 0. 02 MPa. The rise of pressure no longer took place. The damping hole not only reduced the rise of pressure in the back pressure valve but also improved the stability of the hydraulic control system.

关 键 词：注塑机 液压系统 预塑背压 压力特性 阻尼配比 

分 类 号：TH137.5[机械工程—机械制造及自动化] TQ320.52[化学工程—合成树脂塑料工业]