Impulse turbine stage with reduced secondary losses
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United States of America Patent
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Jun 30, 1992
Grant Date -
N/A
app pub date -
May 13, 1991
filing date -
May 14, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impulse turbine stage comprising a set (1) of fixed vanes (2) fixed to the stator (3) of the turbine and supporting a diaphragm (4), followed by a set (7) of moving vanes (8) mounted on a disc (9) fixed to the rotor (6) of the turbine, the stage being characterized in that said disk (9) is provided with through ducts (12) parallel to the axis of the rotor (6) and in that the inlets to the ducts (12) opening out into the gap between the diaphragm (6) and the disk (9) are provided with scoops (15) open sideways in the direction of rotation to direct fluid into the ducts (12). The invention serves to reduce the secondary losses of an impulse turbine.
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