| 旋涡泵的内容 |
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kailiang43 发表于 2013-2-27 14:42:00 |
旋涡泵（也称涡流泵）是一种叶片泵。主要由叶轮、泵体和泵盖组成。叶轮是一个圆盘，圆周上的叶片呈放射状均匀排列。泵体和叶轮间形成环形流道，吸入口和排出口均在叶轮的外圆周处。吸入口与排出口之间有隔板，由此将吸入口和排出口隔离开。
我们将泵内的液体分为两部分：叶片间的液体和流道内的液体。当叶轮旋转时，在离心力的作用下，叶轮内液体的圆周速度大于流道内液体的圆周速度，故形成图1所示的“环形流动”。又由于自吸入口至排出口液体跟着叶轮前进，这两种运动的合成结果，就使液体产生与叶轮转向相同的图2（绿色）示的“纵向旋涡”。因而得到旋涡泵之名。需要特别指出的是，液体质点在泵体流道内的圆周速度小于叶轮的圆周速度。
在纵向旋涡过程中，液体质点多次进入叶轮叶片间（图2），通过叶轮叶片把能量传递给流道内的液体质点。液体质点每经过一次叶片，就获得一次能量。这也是相同叶轮外径情况下，旋涡泵比其它叶片泵扬程高的原因。并不是所有液体质点都通过叶轮,随着流量的增加，“环形流动”减弱。当流量为零时，“环形流动”最强，扬程最高。
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阅读全文 | 回复(13) | 引用通告 | 编辑 |
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| Re:在漫画中识别身边的违章 |
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omegk(游客)发表评论于2017-2-19 23:27:04 |
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| Re:在漫画中识别身边的违章 |
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lafhk(游客)发表评论于2016-10-23 14:30:53 |
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| Re:在漫画中识别身边的违章 |
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| Re:在漫画中识别身边的违章 |
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| Re:在漫画中识别身边的违章 |
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| Re:在漫画中识别身边的违章 |
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qndil(游客)发表评论于2016-10-10 3:22:59 |
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| Re:在漫画中识别身边的违章 |
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lbfhl(游客)发表评论于2016-10-9 0:21:09 |
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| 原创 |
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原创(游客)发表评论于2016-9-30 14:33:05 |
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| 原创 |
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原创(游客)发表评论于2016-9-28 19:52:40 |
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| Re:在漫画中识别身边的违章 |
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kjxbf(游客)发表评论于2016-9-24 13:50:49 |
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| 原创 |
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原创(游客)发表评论于2016-9-6 20:15:29 |
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时间记忆
