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汽车离合器膜片弹簧的设计分析.doc

发布:2021-07-17约1.86万字共37页下载文档
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汽车离合器膜片弹簧的设计分析 摘要:汽车离合器是汽车传动系中重要的组成部分,其主要作用是保证汽车平稳起步,并使传动系换档时工作平稳。膜片弹簧离合器因其具有独特的非线性特性、结构简单、工作稳定等优点而得到广泛应用。本文就以车用离合器膜片弹簧为目标,主要完成对其力学性能进行设计工作。设计参照长安轿车膜片弹簧离合器的相关数据,在满足工作性能的前提下,通过A-L 法进行膜片弹簧的结构设计,然后根据设计尺寸运用 PRO/E 软件建立实体模型,利用ANSYS分析软件完成膜片弹簧的有限元强度分析并与理论分析结果进行比较。 关键词:膜片弹簧,设计,特性曲线 Analysis and design?of automobile clutch diaphragm spring Abstract: The clutch is an important component in the transmission of a car, whose main function is to guarantee the smooth start of the car and steady run when the transmission has a gear change. Among various clutches, the work demand is almost all met through separation and connection of the driving disc and driven disc. Due to the unique nonlinear characteristic, simple structure and stable operation, the diaphragm spring clutch has wide applications. So, taking automobile-used clutch diaphragm spring as the goal, this article mainly accomplishes the research on the optimal design of its mechanical properties. Through confirming the corresponding restraint conditions, the corresponding mathematical model has been established, which is then optimized by software. Design uses PRO/E software to analyze the board shell model and the solid model, so as to calculate compaction strength – distortion characteristic curve and compare with the theoretical results to analyze the causes of differences. Also, the reason why Almen-Laszlo formula still has wide use in design practice has been pointed out. Keyword: Diaphragm spring, Optimization design, Characteristic curve 目 录 TOC \o 1-3 \h \z \u 1 绪 论.. 1 1.1 课题研究的目的和意义 1 1.2 国内外汽车离合器的发展现状 3 1.2.1 国内汽车离合器与膜片弹簧技术的发展 3 1.2.2 国外离合器与膜片弹簧技术的发展 4 1.3 本文主要研究的内容 5 2 膜片弹簧离合器. 6 2.1 膜片弹簧离合器的总体构成 6 2.2 膜片弹簧离合器的工作原理 9 2.3 膜片弹簧的特点 9 2.3.1 膜片弹簧的工作状态 9 3 离合器膜片弹簧设计参数 11 3.1离合器基本性能关系式 11 3.2摩擦片外径D与内径d 11 3.3 离合器后备系数的确定 13 3.4 单位压力P的确定 13 3.5 离合器基本参数的约束条件 15 4 膜片弹簧设计 16 4.1 膜片弹簧主要参数的选择 16 4.1.1 H/h选择 16 4.1.2 选择 16 4.1.3 圆锥底角 16 4.1.4膜片弹簧工作
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