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首頁 >> 新聞動態 >>軸承知識 >> 剖分式滑動軸承的潤滑原理
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剖分式滑動軸承的潤滑原理

剖分式滑動軸承又稱對開式滑動軸承,由軸承器、軸承座、對開軸瓦、墊片、螺栓等組成,了解該形式軸承結構、潤滑原理及安裝工藝,對大型設備的維護、保養是一項重要的工作。

剖分式滑動軸承的潤滑原理

 

1 潤滑原理

 

這種軸承潤滑形成大致有3個過程,軸靜止時由于自身重量而處于最低位置,潤滑油被軸頸擠出,薄壁軸承與軸頸側面之間形成楔型游隙,當軸頸旋轉時,由于油的粘性在金屬表面附著力,油層隨軸一起旋轉,油層經過楔形游隙時,由于分子受到擠壓和本身動能,對軸產生壓力將軸向上抬起,當達到一定速度時,油對軸壓力增大,軸與軸承表面完全被油膜隔開,從而形成了液體動壓潤滑。


剖分式滑動軸承的潤滑原理

形成液體動壓潤滑的條件是:

 

① 軸頸與軸承配合后應有一定間隙,一般等于頸直徑的1/1000~3/1000;

② 軸頸必須有一定的線速度,以建立足夠的油楔壓力;

③ 兩工作面間必須連續充滿一定粘度潤滑油。


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