摘要

鏈傳動是具有中間撓性的嚙合傳動，兼有齒輪傳動與帶傳動的一些特點。它具有結構簡單、傳動力大、效率高、傳動比正確、環(huán)境適應性強，緊湊、經濟、耐用和維修保養(yǎng)容易等優(yōu)點。
鏈條是各種機械上使用十分廣泛的基礎件之一。已應用于國民經濟的各個領域，無論是傳遞動力的傳動鏈，還是搬運物品的輸送鏈，還是提升貨物的起重鏈，都具有良好的使用性能。除了大幅度提高鏈傳動工作能力、擴大鏈傳動使用范圍，一些以鏈條為主要工作部件的產品以及各種有實用價值的鏈條機構，也有了很大的發(fā)展。
目前機械工程界對鏈傳動產品的研制主要是建立模型進行實驗，找出問題后解決。而隨著計算機技術的發(fā)展，有限元理論日益完善，對鏈傳動進行計算機輔助分析，在研制鏈傳動產品中起到了越來越大的作用。
本文具體內容包括：①介紹鏈傳動在國內外的發(fā)展概況、趨勢。包括國內鏈傳動產品現(xiàn)狀和鏈傳動產品技術現(xiàn)狀及發(fā)展趨勢。②簡要地介紹鏈傳動的基原理、嚙合特點、種類和主要傳動形式，分析鏈傳動存在的問題，討論了提高傳動產品性能、品質的方法。③目前關于鏈傳動受力計算中所使用的方法都沒考慮因鏈和鏈輪的加速度變化所引起的附加動載荷效應，作者介紹一組計入鏈鏈輪的加速度變化所引起的附加動載荷效應的關于鏈傳動受力的計算公式,并過具體分析和實例計算證明這組計算公式的必要性和良好的實用性。④運用應力應變理論公式計算外鏈板、銷軸和內鏈板、套筒在載荷情況下的應力值；應用性力學知識計算銷軸、套筒元件接觸應力數(shù)值；計算鏈條和鏈輪嚙合時，鏈輪滾子的接觸應力數(shù)值。⑤以JH125摩托車用的滾子鏈為例，應用CAD/CAE軟件和ANSYS 10.0，依據(jù)有限元理論進行三維實體建模。分析外鏈板、銷軸和內鏈板套筒元件應力應變情況；分析銷軸、套筒元件接觸強度；分析鏈條和鏈輪嚙合時鏈輪和滾子的接觸強度。⑥把常規(guī)計算及有限元分析所得數(shù)值進行比較。


關鍵詞：滾子鏈,鏈輪，CAD/CAE，ANSYS 10.0 有限元法，接觸分析

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，F(xiàn)EA，analysis of contact



目 錄

中文摘要 Ⅰ
ABSTRACT Ⅱ
1緒論 1
1.1鏈條發(fā)展簡介 1
1.1.1傳動鏈分類 1
1.1.2鏈傳動市場的特點 3
1.1.3鏈條前景 3
1.1.4鏈傳動行業(yè)重點發(fā)展 4
1.2國內外鏈條行業(yè)現(xiàn)狀 4
1.3制鏈技術的發(fā)展 5
1.3.1鏈條技術發(fā)展的重點..