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1、 .摘 要制动主缸是制动系统的重要组成部分，制动主缸的制动效能、制动稳定性，直接影响到汽车行驶的安全性。因此，在确定其结构方案时提出几个备选方案，并通过对其进行比较和分析，确定出了最正确传动系统的设计方案。本次设计采用液动理论与机械设计理论对制动主缸进行设计，结构采用双管路液压制动主缸，包括缸体，缸体里设有前后两个主缸，每个主缸中设有油腔和活塞，以与与贮油箱连通的补偿孔和与活塞配套使用的密封圈。其中后主缸的油腔里还设有一个与后轮缸连通的油孔和回位弹簧，其特征是在前、后主缸之间还设有一个增压缸，该增压缸包括增压油腔和增压活塞，增压油腔与前油腔之间设有回油孔和限压油路，增压油腔里还设有一个与前轮缸
2、连通的油孔和回位弹簧，前油腔里设有泄压油路。最后，经校核计算，结构满足要求。关键词：液动理论；制动效能；制动主缸AbstractBraking main cylinder is an important part of the cylinder brake system, braking performance and braking stability directly affect the safety of the car; Therefore, in its structure scheme needs to proposed several alternatives and thro
3、ugh comparison and analysis of it, which can determine the optimum transmission system design scheme.This design uses dynamic theory and mechanism design theory of brake main cylinder structure to design, which also uses dual-pipes hydraulic brake main cylinderincluding the cylinder block, it has tw
4、o main cylinder, every main cylinder has a piston and an oil storage tank, as well as connecting with the compensation and the supporting the use of piston ring. Among the chambers oil cylinder, thereis a rear wheel cylinder connected with the oil hole and return spring, its characteristic is betwee
5、n, each cylinder, there is a pressurized cylinder, the pressurized cylinder is made up of pressurization oil chamber pressurization piston, pressure and oil chamber and former oil chamber between oil and oil pressure, the oil chamber pressurization has a front wheel cylinder connected with the oil h
6、ole and return spring, before the cavity pressure oil with oil. Finally, after checking computation, the structure satisfy the requirement.Keywords: hydraulic theory, Braking performance, Braking main cylinder目 录摘 要IABSTRACTII第1章 绪论11.1 项目研究的意义11.2 国外发展情况1第2章 刹车泵总体设计52.1 刹车泵概述52.2 刹车泵设计要求52.3 刹车泵方案的
7、确定与其工作原理62.4 总体方案评价7第3章 制动系的主要参数与其选择103.1 汽车参数的选择103.2 汽车质量的确定103.3 汽车最小制动力的确定103.4 前后制动器的制动力分配比例113.5各轮缸输入力的确定123.5.1 前轮盘式制动器的输入力的确定133.5.2后轮鼓式制动器轮缸输入力的计算13第4章制动主缸直径D的确定164.1 对于前轮轮缸直径d1164.2 后轮轮缸直径的确定164.3 制动主缸直径d0的设计计算16第5章 前轮轮缸主要结构参数的设计计算195.1 工作压力P195.2 流量的确定195.3缸筒的设计205.3.1 缸筒径205.3.2 缸筒壁厚215.
8、3.3 缸盖厚度的确定225.3.4 工作行程的确定235.3.5 最小导向长度的确定235.3.6 活塞宽度的确定235.3.7 缸体长度的确定235.4 活塞的设计235.4.1 结构形式245.4.2 活塞与活塞杆的连接245.4.3 活塞材料245.5 密封圈245.6 活塞杆245.6.1 活塞杆要在导向套中滑动245.6.2 活塞杆的计算245.7 活塞杆的导向套、密封、防尘255.7.1 导向套长度的确定255.7.2 加工要求255.8 油口255.9 密封件、防尘圈的选用26第6章 后轮轮缸的设计计算286.1 后轮工作压力P286.2 缸筒的设计286.2.1 缸筒壁厚28
9、6.2.2 缸筒壁厚验算286.2.3 缸体底部厚度286.2.4 缸体头部法兰厚度296.2.5 液压缸工作行程的确定296.2.6 最下导向长度296.2.7 缸体长度的确定296.3 活塞的设计296.4 活塞杆的设计306.5 活塞杆的导向套、密封、防尘306.6 油口30第7章 制动主缸的设计计算337.1 主缸主要供油量的计算337.2 第一段长度的确定337.3 缸筒的结构参数的确定337.3.1 缸筒壁厚的确定337.3.2 缸筒连接方式347.4 第一缸活塞直径的确定347.5 第二缸的设计357.6 导向套、密封357.7 油口的选择357.8 选取弹簧36第8章制动踏板力
10、的校核36第9章 管道尺寸37结论38致39参考文献40Catalogue ABSTRACTIICHAPTER1 INTRODUCTION11.1The significance of research projects11.2Domestic development situation1CHAPTER 2 BRAKE PUMP DESIGN52.1The brake pump52.2The brake pump design requirements52.3The brake pump design and work principle62.3Overall scheme evaluatio
11、n7CHAPTER 3 OF THE MAIN PARAMETERS OF BRAKING ANDCHOICE93.1 Auto parameter selection93.2The quality of the car93.3 Minimum force of car93.4 The brake system and dynamic allocation proportion103.5All round the input VAT113.5.1Front disc brake force of the input123.5.2The rear wheel cylinder drum brak
12、e force of the input12CHAPTER 4 BRAKING MAIN CYLINDER DIAMETERS D154.1For front wheel cylinder diameters D154.2 The rear wheel cylinder diameters154.3 Braking main cylinder diameters d design calculation15CHAPTER 5 FRONT WHEEL CYLINDER STRUCTURE PARAMETERDESIGN CALCULATION185.1Work stress P185.2The
13、flow185.3Cylinder design195.3.1Diameter cylinder205.3.2Inner cylinder205.3.3The thickness of the cylinder215.3.4The work schedule225.3.5The minimum length guide225.3.6The width of the pistons225.3.7The length of cylinder225.4 The piston design235.4.1Structure235.4.2The piston and piston rod connecti
14、ons235.4.3The piston material235.5 Sealing ring235.6 The piston rod235.6.1The piston rod to guide in sliding235.6.2The piston rod245.7 The piston rod guide, sealing, dustproof245.7.1The length of orientation245.7.2Processing requirements245.8 Oil mouth255.9 Seals, dustproof circle25CHAPTER 6 REAR WH
15、EEL CYLINDER DESIGN CALCULATION276.1The rear pressure P276.2Cylinder design276.2.1Inner cylinder276.2.2Inner cylinder thick276.2.3Block bottom thickness276.2.4Cylinder head flange thickness286.2.5Hydraulic cylinder work schedule286.2.6The minimum length guide286.2.7The length of cylinder286.3 The piston design286.4 Pi
