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壓力供油徑向圓形軸承

2014-08-14 15:27 作者:管理員9 來源:未知 瀏覽: 字號:

摘要:徑向滑動軸承,若軸瓦孔的各橫截面均為圓或圓弧,稱為圓形軸承。軸瓦包角為360者,為全圓軸 ,若軸瓦是不完整的圓弧形,即其包角小于360,稱其為部分瓦軸承(圖13.6-1)。 當軸頸中心偏離軸瓦孔的中心時,軸承間隙呈現出收斂楔形。壓力供油提供充足的潤滑油,可

  徑向滑動軸承,若軸瓦孔的各橫截面均為圓或圓弧,稱為圓形軸承。軸瓦包角為360°者,為全圓軸
,若軸瓦是不完整的圓弧形,即其包角小于360°,稱其為部分瓦軸承(圖13.6-1)。
部分瓦軸承
    當軸頸中心偏離軸瓦孔的中心時,軸承間隙呈現出收斂楔形。壓力供油提供充足的潤滑油,可以構成動力潤滑,成為動壓軸承。間隙最大處的油膜厚度為最大油膜厚度h1,間隙最小處的油膜厚度為最小油膜厚度h2,軸頸中心偏離軸瓦孔中心的距離稱為偏心距e。軸承的半徑間隙為CR,它等于軸瓦孔半徑R與軸頸半徑r之差,即CR=R一r,偏心距
e與半徑間隙CR的比為偏心率ε,即ε=e/CR。軸頸處于同心狀態時ε=0,其油膜厚度為ho,因而,h0=CR。
 

(責任編輯:laugh521521)
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