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鼓式制动器冷却系统设计
摘要
为解决装备鼓式制动器的汽车制动性能热衰退而引起的制动失效,本文设计了制动系抗热衰退自控冷却装置。本设计是通过感应器接收制动踏板动作信号,进而使自动控制空调系统工作,制冷气体流经制动器散热器,吸收制动器的热量,从而对制动器起到制冷作用。
本文首先从制动性能热衰退机理出发,分析了制动器生热和散热过程的换热平衡问题,得出导致制动性能热衰退因素,对生热和散热进行了计算,对试验起到了指导作用。针对主要影响因素进行了试验设计,在试验的基础上,着重对电路系统的设计及电动机的选择,风冷片的设计和自动化控制的设计。为了提高驾驶的安全性,进行了自动控制设计。制冷气体由半导体制冷片产生,电流由蓄电池提供,鼓风设备由电动机充当。本课题还进行了系统设计,主要包括:冷却控制系统整体设计、硬件设计及选型、电路设计。
试验表明:该冷却装置可有效地对制动鼓进行及时、迅速地冷却,可防止因制动前车速高或车辆超载引起的制动性能热衰退,并且该冷却装置安装方便灵活、自动化程度高和成本小等优点。将该冷却装置推广运用,将会获得一定的经济、社会效益。
关键词:鼓式制动器冷却系统
Drum brake cooling system design
Abstract
To address equipment, drum brakes, brake thermal performance brake failure caused the recession, the paper design of the braking system controlled cooling heat design is received by the brake pedal movement sensor signal, thereby enabling automatic control air conditioning system work, placed in the brake cooling gas into the position of the radiator, the heat absorption of the brake, and thus play a brake cooling.
This article first recession mechanism of heat from the braking performance, analyzes the brake heat and cooling process, heat balance, heat fade braking performance result obtained factors, heat and cooling is calculated, the test has played a guiding major influencing factors for experimental design, based on the test, focusing on circuit design and motor selection, air-cooled chip design and design order to improve driving safety, for the automatic control gases generated by the semiconductor chip cooling, the current provided by the battery, the electric motor acts as blast project also carried out system design, including: the overall cooling control system design, hardware design and selection, circuit design.
Results sho