某型摩托车用套筒滚子链的有限元分析（本科毕业论文设计）.doc

摘要

链传动是具有中间挠性的啮合传动，兼有齿轮传动与带传动的一些特点。它具有结构简单、传动力大、效率高、传动比正确、环境适应性强，紧凑、经济、耐用和维修保养容易等优点。
链条是各种机械上使用十分广泛的基础件之一。已应用于国民经济的各个领域，无论是传递动力的传动链，还是搬运物品的输送链，还是提升货物的起重链，都具有良好的使用性能。除了大幅度提高链传动工作能力、扩大链传动使用范围，一些以链条为主要工作部件的产品以及各种有实用价值的链条机构，也有了很大的发展。
目前机械工程界对链传动产品的研制主要是建立模型进行实验，找出问题后解决。而随着计算机技术的发展，有限元理论日益完善，对链传动进行计算机辅助分析，在研制链传动产品中起到了越来越大的作用。
本文具体内容包括：①介绍链传动在国内外的发展概况、趋势。包括国内链传动产品现状和链传动产品技术现状及发展趋势。②简要地介绍链传动的基原理、啮合特点、种类和主要传动形式，分析链传动存在的问题，讨论了提高传动产品性能、品质的方法。③目前关于链传动受力计算中所使用的方法都没考虑因链和链轮的加速度变化所引起的附加动载荷效应，作者介绍一组计入链链轮的加速度变化所引起的附加动载荷效应的关于链传动受力的计算公式,并过具体分析和实例计算证明这组计算公式的必要性和良好的实用性。④运用应力应变理论公式计算外链板、销轴和内链板、套筒在载荷情况下的应力值；应用性力学知识计算销轴、套筒元件接触应力数值；计算链条和链轮啮合时，链轮滚子的接触应力数值。⑤以JH125摩托车用的滚子链为例，应用CAD/CAE软件和ANSYS 10.0，依据有限元理论进行三维实体建模。分析外链板、销轴和内链板套筒元件应力应变情况；分析销轴、套筒元件接触强度；分析链条和链轮啮合时链轮和滚子的接触强度。⑥把常规计算及有限元分析所得数值进行比较。


关键词：滚子链,链轮，CAD/CAE，ANSYS 10.0 有限元法，接触分析

ABSTRACT

Chain drive is a flexible middle of the mating drive; both gear transmission and belt drive features. It is simple in structure, large-power, high efficiency and accurate transmission ration, environmental adaptability, compact, economic, durable and easy maintenance advantages.
Chain, as one of the basic mechanical parts, now is wildly used in many fields of national economy. While used as, for example, driving chain for transferring power, transmission chain for conveying items and raising chain for heaving cargo, chain has presented many useful capabilities. Furthermore, above form the working ability of chain being optimized greatly and the use fields of chain being enlarged, many chain products and frameworks hake been developed greatly.
At present, the development of the chain product is being in traditional phase in mechanical engineering all over the world, that is to say: first set up a model, then test it to find if there are any problems, and ameliorate it at last. With the development of computer at a very fast speed and the progress of the theory of FEA increasingly, assembling model and FEA model to analyze the chain transmission now become feasible. This now is becoming more and more important in the development of chain.
This topic comprises of the following parts:
①Survey the present　development and trend of the chain all over the world, Including chain products and chain technologies.
②Explain the basic transmission theory, mesh characters, chain types and the main transmission models briefly, analyze the existent problems, and propose some means to improve the chain products’ capability and performance.
③The present method applied in calculating the power transmission between the chain products has not consider the effects of the appending dynamical load produced by the accelerating speed of mesh between the chain and sprocket wheel. Author presented a suite of functions to calculate the stress brought by the effects of the appending dynamical load produced by the accelerating speed of mesh between the chain and sprocket wheel. Author has proved theses functions to be necessary and usable through analysis and instance.
④Calculate the stress of the chain plate, shaft plug and sleeve while being loaded via the functions of stress and displacement theory, get the contact stress value between the shaft plug and sleeve parts from the elastic mechanical theory, and calculate the contact stress value between the sprocket wheel and roller while in meshing process.
⑤Bring forward a real model:JH125 motorcycle. Use CAD/CAE and ANSYS 10.0 to build a 3-D model according with FEA theory. Analyze the displacement of the chain plates (including outer and inner), shaft plug, and sleeve parts. Analyze the contact strength of the shaft plug and sleeve parts. And analyze the contact strength of the roller and sprocket wheel while in meshing process.
⑥compare the results of the theory with that of FEA analysis.


Keyword: roller chain，sprocket wheel，CAD/CAE，FEA，analysis of contact



目 录

中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1链条发展简介 1
1.1.1传动链分类 1
1.1.2链传动市场的特点 3
1.1.3链条前景 3
1.1.4链传动行业重点发展 4
1.2国内外链条行业现状 4
1.3制链技术的发展 5
1.3.1链条技术发展的重点..