Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel
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United States of America Patent
Stats
-
Nov 25, 2014
Issued Date -
N/A
app pub date -
Mar 4, 2009
filing date -
Mar 5, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This wheel comprises a plurality of vanes (2) arranged on a crown (3) and is equipped with a tip-forming member (10) attached to a central region (32) of the crown or hub of the wheel (1), radially inside the vanes (2), the crown defining a wet surface (31) for guiding a flow (E) passing between the vanes. The tip-forming member (10) is provided with at least one opening (121) for diverting a fraction (E1) of the flow towards the internal volume (V10) of this member. This member comprises a frustoconical annular skirt (11) and at least one fin (15) arranged in its internal volume (V10) and able to modify the path of the flow fraction (E1) entering this volume through the opening (121). This fin (15) extends as far as the edge (112) of the skirt (11) which defines an outlet opening (14) of the member (10) for the flow fraction (E1).
First Claim
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International Classification(s)
- 2009 Application Filing Year
- F03B Class
- 317 Applications Filed
- 191 Patents Issued To-Date
- 60.26 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F03B Class
- 0 % this patent is cited more than
- 11 Age
Maintenance Fees
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|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 25, 2026 |
