Vacuum ejector with tripped diverging exit flow
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United States of America Patent
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Sep 8, 2020
Grant Date -
Nov 5, 2015
app pub date -
Dec 18, 2013
filing date -
Dec 21, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A multistage ejector is provided for generating a vacuum from a source of compressed air. The compressed air is passed through a series of nozzles, which entrains air so as to form a jet flow in two or more stages and generating a vacuum across each stage. The ejector outlet is formed as a nozzle extending to the outlet end of the ejector and arranged to receive the jet flow from the final stage of the ejector. The ejector outlet nozzle includes a diverging section extending at an angle of divergence to the direction of airflow, the diverging section terminating in a stepwise expansion in the cross-sectional flow area, as viewed in a direction perpendicular to the direction of airflow through the ejector outlet nozzle.
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