Axial flow water turbine
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United States of America Patent
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Apr 24, 2018
Issued Date -
N/A
app pub date -
Mar 20, 2014
filing date -
Apr 24, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An axial flow water turbine according to an embodiment includes a discharge ring and a runner vane. When seen in the runner meridional cross section, a straight line that passes a border between a cylindrical surface and a spherical surface of the discharge ring and that is perpendicular to a water turbine rotation axis is denoted as A. A crossing point between the straight line A and the water turbine rotation axis is denoted as B. A straight line inclined by an angle θ of 10 degrees or less is denoted as C. A cross point between the straight line C and the external peripheral end surface of the runner vane is denoted as D. In this case, the external peripheral end of the forward edge of the runner vane is located on the crossing point D.
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