真空泵的传动方式和或原理 真空泵的结构有哪些分类

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  • Publication time:2022-12-09 09:17:44

真空泵的传动方式和或原理 真空泵的结构有哪些分类

一、真空泵的传动方式和或原理

        真空泵的两个转子是通过一对高精度齿轮来实现其相对同步运转的。主动轴通过联轴器与电机联接。在传动结构布置上主要有以下两种:其一是电动机与齿轮放在转子的同一侧如图。从动转子由电动机端齿轮直接传过去带动,这样主动转子轴的扭转变形小,则两个转子之间的间隙不会因主动轴的扭转变形大而改变,故使转子之间的间隙在运转过程中均匀。这种传动方式的大缺点是:

        

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a.主动轴上有三个轴承,增加了泵的加工和装配难度,齿轮的拆装及调整也不便;

        b.整体结构不匀称,泵的重芯偏向电动机和齿轮箱一侧。

二、真空泵的总体结构和分类

        真空泵的泵体的布置结构决定了真空泵的总体结构。

        立式真空泵结构的进、排气口水平设置,装配和连接管路都比较方便。但真空泵的重芯较高,在高速运转时稳定性差,故这种型式多用于小泵。

        卧式真空泵的进气口在上,排气口在下。有时为了真空系统管道安装连接方便,可将排气口从水平方向接出,即进、排气方向是相互垂直的。此时,排气口可以从左或右两个方向开口,除接排气管道一端外,另一端堵死或接旁通阀。这种泵结构重芯低,高速运转时稳定性好。一般大、中型泵多采用此种结构。

    真空泵的两个转子轴与水平面垂直安装。这种结构装配间隙容易控制,转子装配方便,真空泵占地面积小。但真空泵重芯较高且齿轮拆装不便,润滑机构也相对复杂。


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