鼓式制动器冷却系统设计.docVIP

诚信申明 本人声明： 我所呈交的本科毕业设计（论文）是本人在导师指导下对四年专业知识而进行的研究工作及全面的总结。尽我所知，除了文中特别加以标注和致谢中所罗列的内容以外，论文中创新处不包含其他人已经发表或撰写过的研究成果，也不包含为获得北京化工大学或其它教育机构的学位或证书而已经使用过的材料。与我一同完成毕业设计（论文）的同学对本课题所做的任何贡献均已在文中做了明确的说明并表示了谢意。 若有不实之处，本人承担一切相关责任。 本人签名： 年 月 日 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 recession.This 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 role.The major influencing factors for experimental design, based on the test, focusing on circuit design and motor selection, air-cooled chip design and design automation.In order to improve driving safety, for the automatic control design.Refrigerant gases generated by the semiconductor chip cooling, the current provided by the battery, the electric motor acts as blast equipment.The project also carried out system design, including: the overall cooling control system design, hardware design and selection, circuit design. Results show that: the cooling device can be effectively carried out in time for brake drums and quickly cooling to prevent high speed by braking or vehicle prior to braking performance