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1. 发明授权

US4627792A Rotating flow pump with a feed pump unit formed as an ejector 失效
标题翻译：旋转流量泵具有作为喷射器形成的进料泵单元
公开(公告)号：US4627792A
公开(公告)日：1986-12-09
申请号：US775160
申请日：1985-09-12
申请人： Niels D. Jensen , Gunnar Langgaard
发明人： Niels D. Jensen , Gunnar Langgaard
IPC分类号： F04D9/06 , F04F5/42 , F04F5/46 , F04B23/14
CPC分类号： F04F5/42 , F04D9/06 , F04F5/464
摘要： A rotating flow pump such as a centrifugal pump is provided with a feed pump unit formed as an ejector. The feed pump unit comprises an inlet portion, a nozzle, and a diffuser arranged in succession, and the diffuser is connected to the inlet opening of the flow pump. The inlet portion, the nozzle, and the diffuser of the ejector are situated in a plane perpendicular to the shaft of the flow pump. The diffuser comprises an inner channel of a uniformly increasing flow cross section at least over part of its length. Furthermore the diffuser comprises an outer jacket situated substantially coaxially about the above channel. Thus the jacket is formed in such a manner that a substantially 180.degree. almost mushroom-shaped turning of the flow direction for the liquid flowing through the diffuser is obtained at the same time as a uniformly increasing flow cross section--seen in the flow direction--is obtained within the annular chamber between the channel and the jacket. In this manner the diffusing capacity of the ejector can be very high at the same time as the flow pump takes up relatively little room.
摘要翻译：诸如离心泵的旋转流量泵设置有形成为喷射器的进料泵单元。进料泵单元包括连续排列的入口部分，喷嘴和扩散器，并且扩散器连接到流量泵的入口。喷射器的入口部分，喷嘴和扩散器位于与流量泵的轴垂直的平面中。扩散器包括在其长度的至少一部分上具有均匀增加的流动横截面的内部通道。此外，漫射器包括围绕上述通道大致同轴地设置的外部护套。因此，夹套的形成方式是在与流动方向相同的流动截面的同时获得流过扩散器的液体的流动方向大致为180度的几乎蘑菇状的转动，在通道和护套之间的环形室内获得。以这种方式，喷射器的扩散能力可以非常高，同时流动泵占据相对较小的空间。

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