Self-Regulating Water Turbine Runner, Water Turbine Equipped with Sub-Runner Located Upstream of the Main Runner and Water Turbine Comprising the Same
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United States of America Patent
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Issued Date -
Dec 15, 2022
app pub date -
Oct 22, 2020
filing date -
Oct 22, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a turbine sub-runner that is positioned to be within the vortex zone of a turbine wicket gates (zone “S—R”, FIG. 1). The sub-runner includes at least two sub-runner blades, configured to monitor the relative flow of the vortex created by the wicket gates. A control mechanism is connected to the sub-runner shaft via gear and threaded interface, and is capable of transferring the relative (vs main-runner) rotational energy of the sub-runner into angular movement of the main runner blades. As the sub-runner interacts with the changing conditions of the main vortex within the zone “S—R”, it will act to automatically regulate, adjust, and control the angle of the main runner blades to optimize the performance of the turbine. The sub-runner uses the energy of the vortex existing in the zone “S—R” to perform the monitoring, regulation, adjustment and control of the main runner through regulating angular position of main runner blades.
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