新型扭转寿命试验机设计（本科毕业论文设计）.doc

摘    要
　　　离合器位于发动机和变速箱之间的飞轮壳内，用螺钉将离合器总成固定在飞轮的后平面上，离合器的输出轴就是变速箱的输入轴。在汽车行驶过程中，驾驶员可根据需要踩下或松开离合器踏板，使发动机与变速箱暂时分离和逐渐接合，以切断或传递发动机向变速器输入的动力。
　　离合器作为汽车传动系统的重要部件，离合器的功用主要有3个：保证汽车平稳起步前汽车处于静止状态；便于换档，汽车行驶过程中，经常换用不同的变速箱档位，以适应不断变化的行驶条件；防止传动系过载。
　　　离合器从动盘是离合器的重要部件之一。其性能的优劣直接影响离合器的性能。为了确保离合器的工作性能，使其处于良好的工作状态，在离合器装配前需要对从动盘进行性能检测，其中，对其做疲劳寿命试验是一个重要的步骤。
　　　汽车离合器从动盘扭转寿命试验机是汽车零部件寿命试验的重要试验设备。研究开发自动化程度较高的此类试验机，对于提高汽车离合器甚至是整台汽车的产品质量有着较广泛的实用性。同时它对促进国内汽车零部件工业的发展有着重要意义。
　　　目前国内的大多数试验机都是在离合器盘总成固定的情况下进行试验的,这并不符合离合器盘总成的实际工况，论文提出了一种新型汽车离合器从动盘扭转寿命试验机——离合器盘高速旋转疲劳寿命试验机。该试验机可以是在盘高速旋转的情况下进行试验的,更符合离合器的实际工况。
　　　论文详细介绍了新型扭转疲劳寿命试验机的选型分析、研制过程、性能特点、组成及测控原理。
　　　

关键词：离合器, 高速旋转, 疲劳寿命试验机

　　
ABSTRACT
　　
　　Clutch pedal in the engine and gearbox between the flywheel shell, with screw will be fixed in the clutch assembly after the plane of the flywheel, clutch gearbox output shaft is the input shaft. In the process of moving vehicle, the driver may need to push or release the clutch pedal so that the engine and gearbox temporary separation and progressive joint, to cut off the engine or transmission to the transmission input power.
　　Clutch Transmission System as an important vehicle parts, the clutch has three main functions: to ensure a smooth start before the vehicle in a stationary vehicle; facilitate the shift, the process of moving car, often used for the transmission of different stalls to adapt to changing The traffic conditions prevent the transmission of the overload.
　　This machine is one of the important parts. It directly impact on the performance of the merits of clutch performance. In order to ensure that the work of clutch performance, it is good working condition, in the clutch assembly before the need for a performance-driven detection, which do their fatigue life test is an important step.
　　Car driven clutch reverse the life-testing machine is the life test of automotive components important test equipment. A higher degree of automation research and development of such testing machine for raising automobile clutch or even the entire automotive product quality has a wider relevance. At the same time its domestic auto parts industry to promote the development of great significance.
　　Most of the current domestic testing machine is fixed in the clutch disc assembly of the circumstances test, this does not meet the clutch disc assembly of the actual conditions, paper puts forward a new car driven clutch reverse-life test machine -- -- High-speed rotating disc clutch fatigue life testing machine. The testing machine can be set in the high-speed rotation of the circumstances of the trial, more in line with the actual conditions clutch.
　　Papers detail on the new plane reversed fatigue life test of the selection, development process, features, composition and monitoring principles.

Key words: clutch, high-speed rotation, fatigue life testing machine

目录
摘    要..........................................................................................I
ABSTRACT.........................................................................................II
1  绪论.............................................................................................1
　　1.1 汽车离合器从动盘简介..................................................................1
　　1.2 机械零部件疲劳寿命试验系统的组成及发展趋势......................................3
　　1.2.1 机械零部件疲劳寿命试验系统的一般组成......................................3
　　1.2.2 机械零部件疲劳寿命试验系统的发展...........................................5
　　1.3 本课题研究的意义........................................................................6
　　1.4 本课题的研究内容........................................................................8
2  新型试验机方案讨论..................................................................9
3  试验机的基本结构及组成..........................................................10
　　3.1试验机的主要性能参数..................................................................10
　　3.2 试验步骤.................................................................................10
　　3.3 疲劳寿命试验机的系统功能............................................................10
　　3.4疲劳寿命试验机的机械结构.............................................................11
　　3.4.1 传统疲劳寿命试验机的结构....................................................11
　　3.4.2 新型疲劳寿命试验机的结构....................................................12
　　3.5 设计计算.................................................................................13
　　3.5.1 丝杠螺母副的选择与校核.......................................................13
　　3.5.2 丝杠单螺母的分析与计算.......................................................16
　　3.5.3 主轴承的选择与校核............................................................17
4  试验机的测控原理.....................................................................19
　　4.1 试验机的检测原理......................................................................19
4.1.1 扭转次数的检测.................................................................19
　　4.1.2 从动盘的摆角测量...............................................................19
　　4.1.3 扭矩的测量......................................................................20
　　4.2 电机变频驱动原理......................................................................22
　　4.2.1 交流异步电机变频调速原理.....................................................22
　　4.2.2 变频器.............................................................................24
　　4.3 试验机的控制系统......................................................................26
5  结论..........................................................................................28
参考文献........................................................................................29