Hydroelectric generator having retractable runner
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United States of America Patent
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Jun 28, 1988
Grant Date -
N/A
app pub date -
Jun 2, 1987
filing date -
Jun 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydroelectric generator is provided with a retractable runner and, optionally, with a retractable distributor. This is accomplished by mounting the runner on a runner shaft which is axially movable in order to permit selective retraction and extension of the runner exteriorly of the generator housing. In this way, the runner may be selectively withdrawn from the inlet to its associated draft tube in order to clear the inlet and increase its water flow rate capacity during periods of flood or excessive high water. The distributor, i.e., the wicket gates, may optionally also be carried on the runner shaft for axial retraction and extension therewith.
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