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行星齒輪傳動的傳動比

2014-07-29 14:51 作者:管理員11 來源:未知 瀏覽: 字號:

摘要:行星齒輪傳動的傳動比代號含意如下: 行星傳動的傳動比計算多采用轉化機構法。所謂轉化機構就是給整個行星齒輪傳動機構加上一個-nH:轉速(nH行星架轉速),使整個機構相當于行星架不動的定軸輪系。這樣用計算定軸輪系的傳動比公式計算轉化機構的傳動比,然后再

    行星齒輪傳動的傳動比代號含意如下:

        行星傳動的傳動比計算多采用轉化機構法。所謂轉化機構就是給整個行星齒輪傳動機構加上一個-nH:轉速(nH—行星架轉速),使整個機構相當于行星架不動的定軸輪系。這樣用計算定軸輪系的傳動比公式計算轉化機構的傳動比,然后再計算行星齒輪傳動的傳動比。
        轉化機構的傳動比計算公式

    同理,如果給予整個傳動機構(參看表9.1-1中序號為4的簡圖)以某構件(a或e)大小相等方向相反的轉速時,可將式(9.1-4)擴大為

    式(9.1一5)、式(9.1-6〕相加便導出普遍什算式
    式(9.1-4)中的m表示a, b間外嚙合齒輪的對數。式(9.1-4)~式(9.1-6)中的na、nb、ne分別代表行星齒輪傳動中的構件a、b、e的轉速。
    例1 求齒輪b固定時NGW型行星齒輪傳動的傳動比的計算式《簡圖見表9.1-1)。
    解 由式〔9.1-4)得

    由式〔9.1-7)得



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