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軸的臨界轉速計算示例

2014-07-28 18:22 作者:管理員9 來源:未知 瀏覽: 字號:

摘要:例1 圖12.5-2所示為由兩個軸承支承的鼓風機的轉子,其各段的直徑與長度尺寸,以及4個圓盤所受的W1~W4重力均列于表12.5-5。試計算轉子的一階臨界轉速ncr1 。 解 由于W1~W44個盤所受的重力遠大于軸上其他零件所受的重力,故其他零件都不作為盤來考慮,而只將其

    例1  圖12.5-2所示為由兩個軸承支承的鼓風機的轉子,其各段的直徑與長度尺寸,以及4個圓盤所受的W1~W4重力均列于表12.5-5。試計算轉子的一階臨界轉速ncr1 。
    解  由于W1~W44個盤所受的重力遠大于軸上其他零件所受的重力,故其他零件都不作為盤來考慮,而只將其重力加在相應的軸段上。
    本例可利用表12.5-1所列公式分別算出只考慮軸自重及每個圓盤時的臨界轉速,然后用式(12.5-2)或式(12.5-3)計算轉子的臨界轉速。階梯軸的當量直徑dv用式(12. 5-1 )計算。計算過程及結果列于表12.5-5。
鼓風機轉子
計算結果1
計算結果2
計算結果3
(責任編輯:laugh521521)
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