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Impact dynamics of axially moving chains with tensioners.

機(jī)譯：帶張緊器的軸向運動鏈條的沖擊動力學(xué)。

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摘要

Chain drives have been widely used since they are one of the most efficient power transmission mechanisms. However, the noise and the vibration created by the chain drives has always been a problem, especially in today's high speed, light weight and high quality products. The impact in the chain/sprocket meshing process has been identified as a major noise source. In many chain drive systems, a tensioner is used to improve performance by eliminating flop and sway on the slack side and reducing noise and vibration on the tight side. In spite of the production use of tensioners, the effects of tensioners on the chain/sprocket impact dynamics has not been researched.; A comprehensive dynamic model of chain drives with tensioners has been derived. Based on the model, the tensioner effects on the impact dynamics is investigated. It is found that the impact dynamics can be significantly affected by the tensioner mass, stiffness and location along the chain span. The amplitude fluctuation related to meshing impact with respect to sprocket speed can be reduced by tuning the tensioner parameters. A design optimization strategy to reduce the fluctuation with respect to sprocket speeds is developed and proposed.; Experimental investigations have been performed to investigate the dynamic characteristics of the chain drive system under the effects of tensioners. The first natural frequency of the chain drive is measured with different chain tensions and different tensioner parameters. The results from the tests show that the fundamental behavior of the analytical model is valid. Furthermore, experimental investigation of a chain drive system with a tensioner correlates with trends predicted in the analytical model.
機(jī)譯：鏈傳動是最有效的動力傳輸機(jī)制之一，因此已被廣泛使用。但是，鏈傳動裝置產(chǎn)生的噪音和振動一直是個問題，特別是在當(dāng)今的高速，輕巧和高質(zhì)量產(chǎn)品中。鏈條/鏈輪嚙合過程中的影響已被確定為主要噪聲源。在許多鏈傳動系統(tǒng)中，張緊器用于消除松弛側(cè)的晃動和晃動并減小緊側(cè)的噪聲和振動，從而提高性能。盡管在生產(chǎn)中使用了張緊器，但尚未研究過張緊器對鏈條/鏈輪沖擊動力學(xué)的影響。推導(dǎo)了帶有張緊器的鏈傳動的綜合動力學(xué)模型?；谠撃Ｐ?，研究了張緊器對沖擊動力學(xué)的影響。已經(jīng)發(fā)現(xiàn)，張緊器的質(zhì)量，剛度和沿鏈條跨度的位置會顯著影響沖擊動力學(xué)?？梢酝ㄟ^調(diào)整張緊器參數(shù)來減少與嚙合沖擊有關(guān)的鏈輪速度有關(guān)的振幅波動。提出并提出了一種減少鏈輪速度波動的設(shè)計優(yōu)化策略。已經(jīng)進(jìn)行了實驗研究以研究在張緊器的作用下鏈傳動系統(tǒng)的動態(tài)特性。在不同的鏈條張力和不同的張緊器參數(shù)下測量鏈傳動的第一固有頻率。測試結(jié)果表明分析模型的基本行為是有效的。此外，帶有張緊器的鏈傳動系統(tǒng)的實驗研究與分析模型中預(yù)測的趨勢相關(guān)。

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  • 作者

    Kim, Hyoungnam.;

  • 作者單位

    The Pennsylvania State University.;

  • 授予單位 The Pennsylvania State University.;
  • 學(xué)科 Engineering Mechanical.
  • 學(xué)位 Ph.D.
  • 年度 1997
  • 頁碼 165 p.
  • 總頁數(shù) 165
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 機(jī)械、儀表工業(yè);
  • 關(guān)鍵詞

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