基于AMESim矿用汽车液压制动系统优化分析  

Optimization Analysis of Hydraulic Braking System in Mining Truck Based on AMESim

作　　者：宋飞[1] 

机构地区：[1]南京信息职业技术学院,江苏南京210046

出　　处：《机械设计与制造》2016年第11期218-222,共5页Machinery Design & Manufacture

基　　金：江苏省自然科学基金(BK2011296)

摘　　要：液压制动系统采用全液压双制动回路,前后制动回路相互独立,蓄能器提供压力,提高了制动系统的可靠性,因此在矿用汽车中应用越来越普遍。蓄能器的容积不仅影响液压泵的启动频次,也对对系统的充液时间具有重要影响。根据液压制动系统工作原理和结构特点,对液压制动系统的制动压力及制动力矩进行分析。基于AMESim搭建矿用汽车液压制动系统分析模型,对整个系统的动态特性及蓄能器的压力变化情况对系统性能影响进行分析。结果表明:蓄能器的容积越大,在液压泵停止工作后可提供的制动次数越多;但蓄能器体积越大充液的时间越长,则在选择蓄能器时应在满足要求的前提下,选择体积较小的;蓄能器的充液时间与蓄能器体积并不是成线性关系;针对所研究车辆,采用8L蓄能器,其可连续制动6次,压力从18MPa降为10.5MPa。分析结果为此类优化设计提供参考。The hydraulic braking system using the full hydraulic double brake circuit, the front and rear brake circuits are independent of each other, and the accumulator provides the pressure, which improves the reliability of the brake system, so it is used more and more widely in the mining truck. The volume of accumulator not only affects the starting frequency of hydraulic pump, but also has important influence on the filling time of the system. According to the working principle and structure characteristics of the hydraulic braking system, the braking pressure and braking torque of hydraulic braking system were analyzed. The analysis model of the hydraulic braking system of mining truck based on AMESim was built, and the dynamic characteristics of the whole system and the pressure change of the accumulator were analyzed. The results show that the capacity of accumulator can provide more time for the hydraulic pump, but the time of accumulator is longer and the volume of accumulator is smaller. The time of charging and storage is not linear. To the research truck, the 8L accumulator can be used continuously for 6 times, the pressure drop from 10.SMPa to 18MPa. The analysis results provide reference for the design of this kind of optimization.

关 键 词：矿用汽车 液压制动系统 蓄能器 模型 优化分析 

分 类 号：TH16[机械工程—机械制造及自动化] TH137.3