全液压制动系统继动阀动态特性研究  

Study on Dynamic Characteristics of Relay Valve in Hydraulic Brake System

作　　者：王同建 付德龙 张美荣 陈晋市 张飞[3] 王一川 WANG Tongjian;FU Delong;ZHANG Meirong;CHEN Jinshi;ZHANG Fei;WANG Yichuan(School of Mechanical and Aerospace Engineeringr,Jilin University,Changchun 130025,China;State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,China;Inner Mongolia First Machinery Group Co.,Ltd,Baotou 014000,China)

机构地区：[1]吉林大学机械与航空航天工程学院,吉林长春130025 [2]吉林大学汽车仿真与控制国家重点实验室,吉林长春130025 [3]内蒙古第一机械集团有限公司科研所,内蒙古包头014000

出　　处：《湖南大学学报（自然科学版）》2021年第4期126-134,共9页Journal of Hunan University:Natural Sciences

基　　金：装备预先研究项目(301051103)。

摘　　要：为验证继动阀的可靠性(输出压力12.0 MPa,响应时间0.2 s),并研究继动阀动态特性对全液压制动系统制动性能的影响,以某型号越野车开发的全液压制动系统为研究对象,建立了继动阀理论分析模型,运用AMESim软件建立了全液压制动系统仿真模型,分析了阀芯摩擦力、节流口的初始遮盖量、复位弹簧初始压缩量和弹簧刚度对制动性能的影响,并通过实验验证了仿真模型的准确性.研究结果表明:继动阀应用于液压制动系统可以满足制动要求(输出压力12.0 MPa,响应时间0.2 s);阀芯摩擦力过大会使继动阀的开启压力增大,导致继动阀的比例滞环增大,影响阀芯的复位性能;继动阀节流口的初始遮盖量越大,打开节流口克服的摩擦力越大,制动系统的响应时间越长;通过调节继动阀复位弹簧初始压缩量和弹簧刚度可实现制动压力的微调节.理论模型和仿真模型为全液压制动系统的进一步优化提供了可靠依据.To test and verify the reliability of relay valve(with output pressure of 12.0 MPa and response time of 0.2 s),and to study the influence of dynamic characteristics of the relay valve on braking performance of the full hydraulic braking system,taking a type off-road vehicles fully hydraulic braking system as the research object,a theoretical analysis model of the relay valve was established.A simulation model of the full hydraulic brake system was established by applying the software AMESim,and the influence of the spool friction,initial cover,return spring the initial amount of compression and spring stiffness on braking performance was analyzed.The accuracy of the simulation model was verified by experimental results.The comparison shows that the relay valve applied to the hydraulic braking system can meet the braking requirements(output pressure of 12.0 MPa and response time of 0.2s).Excessive friction of the spool increases the opening pressure of the relay valve,which leads to the increase of proportional hysteresis of the relay valve and affects the reset performance of the spool.The greater the initial cover of the relay valve orifice is,the greater the friction to be overcome by opening the orifice becomes,and the longer the response time of the braking system is required.By adjusting the initial compression of the reset spring of the relay valve and the stiffness of the spring,the fine tuning of the brake pressure can be realized.The theoretical model and simulation model provide a reliable basis for further optimization of the full hydraulic braking system.

关 键 词：液压制动 继动阀 AMESIM仿真 动态特性 

分 类 号：TH137.5[机械工程—机械制造及自动化]