液压助力制动系统设计与仿真研究  

Design and Simulation of Hydraulic Assist Braking System

作　　者：魏星 李亮 张斌 景斌 Wei Xing;Li Liang;Zhang Bin;Jing Bin(Changsha Zoomlion Environmental Industry Co.,Ltd.,Changsha 410205,China)

机构地区：[1]长沙中联重科环境产业有限公司,长沙410205

出　　处：《机电工程技术》2022年第6期158-161,共4页Mechanical & Electrical Engineering Technology

基　　金：省科技创新领军人才项目:湖南省科技创新计划资助项目(编号:2020RC4029)。

摘　　要：小型低速电动环卫设备尤其是小型电动扫路机,其驾驶室周边需装配各种专用工作装置,空间极其有限,其整机制动系统常采用纯机械液压制动,该技术成熟,所占空间不大,但其制动脚感差,制动性能低,虽然配合真空助力可极大提高制动性能,但相比传统燃油车发动机进气系统附带的真空度效果,在电动车上需要另外配置真空度产生与维持装置,其所需驾驶室底部装配空间相对较大,而对于空间受限的小型电动扫路机,无法安装真空盘等助力装置。设计了一种纯液压助力集成制动系统,不用过多改变原系统,无需占用驾驶室底部空间,且可以利用扫路机上装已有动力源实现助力制动,同时对该系统进行了仿真建模与对比分析,用以验证并提高整机制动性能。Small low-speed electric sanitation equipment, especially small electric road sweeper, its cab around the need to be equipped with a variety of special working devices, space is extremely limited, the braking system often uses pure mechanical hydraulic braking, mature technology, the empty part is not large, but its braking foot feeling is poor, braking performance is low, although liquid pressure braking with vacuum assistance is widely used because of its technical maturity and stability, but compared with the vacuum effect attached to the air intake system of the traditional fuel vehicle engine, on electric vehicles, it is necessary to configure a vacuum generation and maintenance device separately, which require relatively large assembly space around the cab, however, for small electric road sweepers with limited space, it is impossible to install vacuum discs and other assist devices. Based on the above situation, a hydraulic assist braking system was designed,without too much change of the original system, without occupying the cab bottom space, and could use the existing power source installed on the road sweeper to achieve assist braking. At the same time, the system was simulated modeled and comparatively analyzed to verify and improve the dynamic performance of the whole machine.

关 键 词：低速电动环卫设备 小型电动扫路机 液压力 液压助力制动系统 

分 类 号：U463.5[机械工程—车辆工程]