摘 要
本文选用大众迈腾2.0T制动器展开了以下设计。第一制动系的参数：包括制动力分配系数、同步附着系数、制动强度、附着系数利用率以及最大制动力矩等参数的选择计算；第二制动器及其零部件：制动盘、制动钳体、摩擦衬块等制动器零部件的尺寸计算与材料选择；第三驻车制动：本设计选用了后轮驻车制动，在后轮盘式制动器上加装了驻车制动的机械结构；第四制动驱动机构：制动轮缸、制动主缸、以及踏板行程的设计计算。对所设计的制动器进行了制动减速度与制动距离的验算，对制动效能的稳定性以及制动时的方向稳定性进行了分析，并用MATLAB绘图功能绘制出了前后轴制动力分配曲线，上述均符合设计要求，验证了该制动器设计的合理性。最后，根据设计与计算用CAD绘制出了该迈腾2.0T制动器的装配图和制动钳体、制动盘、活塞、摩擦衬块等零件图，并对其进行了三维建模。本论文简单介绍了制动驱动机构的结构型式选择，制动主缸，制动管路的多回路系统的选择以及制动器的研究现状及发展前景。
大众迈腾汽车制动器，进行具体设计与分析，主要内容有：总体设计，确定制动器的型式； 设计制动器的制动方案；确定制动器的总体结构，绘制总装图。零部件的结构设计和分析，零部件的设计计算和校核；零部件的结构设计，绘制部装图、零件图；主要零件的三维造型和有限元分析。
关键词： 迈腾2.0T制动器；CAD；MATLAB；设计；建模
Abstract
In this paper, VW Maiteng 2.0 T brake is selected to carry out the following design.The parameters of the first braking system include the selection and calculation of parameters such as braking force distribution coefficient, synchronous adhesion coefficient, braking strength, utilization ratio of attachment coefficient and maximum braking moment, etc.; the second brake and its components include brake disc, brake clamp body, etc.Dimension calculation and material selection of brake parts such as friction liner block; third parking brake: the rear wheel parking brake is used in this design, and the mechanical structure of parking brake is added to the rear wheel disc brake;Fourth brake drive mechanism: brake wheel cylinder, brake main cylinder, and pedal stroke design calculation.For the design of the brake The brake deceleration and braking distance are checked and calculated, the stability of braking efficiency and the directional stability during braking are analyzed, and the distribution curve of braking force between front and rear axles is drawn with MATLAB drawing function. The above all meet the design requirements.The rationality of the brake design is verified.Finally, according to the design and calculation, the assembly drawing of the Maiteng 2.0T brake and the parts drawings of the brake clamp, brake disc, piston and friction liner are drawn with CAD, and the 3D modeling is carried out.This paper briefly introduces the choice of the structure type of the brake drive mechanism, the choice of the multi-loop system of the brake main cylinder and the brake pipe. And brake research status and development prospects.
The main contents are as follows: the general design, the determination of the type of brake, the design of braking scheme, the determination of the overall structure of the brake, and the drawing of the final assembly diagram.Structural design and analysis of parts, design calculation and verification of parts, structural design of parts, drawing of parts and parts drawings, 3D modeling and finite element analysis of main parts.
Key words: Maiteng 2.0T brake CAD MATLAB; Design; Modeling
目 录
第1章 绪论 1
1.1 制动系统的基本概念 1
1.2 制动系统研究现状 2
1.3 课题主要内容 4
1.4 课题研究方案 4
第2章 制动器的结构形式选择 6
2.1 鼓式制动器结构形式简介 6
2.2 盘式制动器结构形式简介 8
2.3 盘式制动器的优缺点 9
2.4 迈腾2.0T制动器结构的最终选择 10
第3章 迈腾2.0T制动器主要参数及其选择 11
3.1 制动力与制动力分配系数 11
3.2 同步附着系数 16
3.3 制动强度和附着系数利用率 17
3.4 制动器最大制动力矩 18
3.5 制动器因数 20
3.6 盘式制动器主要参数的确定 20
第4章 制动器的设计计算 22
4.1摩擦衬块的磨损特性计算 22
4.1.1比能量耗散率 22
4.1.2 比滑磨功 23
4.2 制动器的热容量和温升核算 24
4.3盘式制动器制动力矩的计算 25
4.4驻车制动计算 26
第5章 制动器主要零部件的结构设计 28
5.1 制动盘 28
5.2制动钳 29
5.3制动块 29
5.4摩擦材料 29
5.5 制动轮缸 31
5.6制动器间隙的调整方法及相应机构 31
第6章 制动驱动机构的结构形式选择与设计计算 32
6.1制动驱动机构的结构型式选择 32
6.2制动管路的多回路系统 37
6.3液压制动驱动机构的设计计算 38
6.3.1制动轮缸直径与工作容积 39
6.3.2制动主缸直径与工作容积 40
6.3.3制动踏板力与踏板行程 40
第7章 制动有限元分析 43
7.1 制动有限元评价指标 43
7.1.1 制动效能 43
7.1.2 制动效能的恒定性 44
7.1.3 制动时汽车的方向稳定性 44
7.2制动器制动力分配曲线分析 45
结 论 47
致 谢 48
参考文献 49
附录A MATLAB编制制动力分配曲线 50
