闭式泵控马达系统反拖工况缓速制动系统设计  

Hydraulic Braked System Design for Closed Pump Control Motor System on Anti-dragged Working Condition

作　　者：何刘宇[1,2] 李运华[2] 

机构地区：[1]北京航天发射技术研究所,北京100076 [2]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《液压与气动》2015年第6期35-40,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51475019)

摘　　要：针对应用于隧道管片运输车上的闭式泵控马达静液驱动系统,为了使车辆能够适应具有一定坡度的长距离下坡工况,设计了一套由定量泵、比例溢流阀构成的液压缓速持续制动装置嵌入到液压驱动行走系统中,以弥补车辆长时间采用刹车制动造成刹车片过热因而易导致刹车失灵的缺陷;推导了通过控制缓速制动液压系统压力对闭式泵控马达驱动系统实现速度控制的数学模型,提出了对马达速度的稳速控制策略;同时,对此设计方案进行了仿真分析,并采用泵控单个马达搭建了最小实验系统进行了实验验证。仿真和实验结果表明,所设计的液压缓速系统能够稳定、可靠地实现在下坡工况下对车辆的缓速制动控制。The hydrostatic driving closed hydraulic system is used on the tunnel segments transportation vehicle.In order to fit the downhill working conditions of long distance with a certain gradient,a hydraulic continued brake equipment that consists of the constant displacement pump and the proportional relief valve is designed and embedded into the driving mobile hydraulics system to compensate the defect of brake failure caused by brake pads overheat when the vehicle brakes too long on the downhill.The mathematical model of closed pump control motor hydraulic system and the brake speed limit hydraulic system are deduced and the motor rotation speed control strategy is proposed.The simulation and experiment results show that the hydraulic continued brake system could realize the speed limit control for the segments transportation vehicle steadily and reliably on the downhill working conditions.

关 键 词：隧道管片车 静液驱动 闭式液压系统 缓速制动 比例溢流阀 

分 类 号：TH137.7[机械工程—机械制造及自动化]