Self-priming pump
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United States of America Patent
Stats
-
Mar 17, 1981
Grant Date -
N/A
app pub date -
Dec 22, 1978
filing date -
Dec 24, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a self-priming centrifugal pump that consists of at least one fully-loaded pump or turbine stage with a horizontal shaft and one priming or ventilator stage that is fixed to the same shaft outside the main delivery stream, in the form of a lateral channel or liquid ring pump. In certain specific applications there is no flow through the ventilator stage during normal operation of the pump, and for this reason the ventilator stage is not cooled. The ventilator stage is cooled by virtue of the fact that the suction side of this stage is not only connected to the suction area of the fully loaded turbine stage, in which the gases that are to be removed usually collect, but is also connected to the pressure side of the pump, so that during normal operation a stream of liquid that has a cooling action is formed, and this passes by the suction opening of the ventilator stage.
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