US3756739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine-pumps
Assignee: ETUDE SOC DEV TURBINES HYDRAUL
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Filing: 1971-06-09
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Granted: 1973-09-04
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Expires: 1991-06-09
Abstract
Abstract The movable guide vanes of the mobile distributor of the turbine pump are short and so arranged with relation to the fixed guide vanes of the fixed distributor, that when the machine operates as a pump the movable guide vanes bear on the trailing ends of the fixed guide vanes, and when the machine operates as a turbine, the movable guide vanes pivot in a direction to increase the opening necessary to ensure suitable distribution of water over the impeller.
Inventors
- 👤 P Boussuges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:52
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/466; F03; F03B; F03B3/00; F03B3/10; F03B3/103; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
343 words
A reversible pump-turbine comprising a distributor including fixed guide vanes arranged in circumferentially spaced relation around the impeller of the turbine-pump and having outer convexly-shaped sides directed away from the impeller, mobile guide vanes, means for supporting each mobile guide vane intermediate its length for pivotal movement about a fixed axis located in adjacently spaced relation to the trailing end of an associated fixed guide vane, said location of such axis being such that when the reversible pump-turbine is to be operated as a pump the leading end of said mobile guide vane is enabled to be advanced inwardly toward and into contact with the inner trailing end of said associated fixed guide vane reducing the opening between said associated fixed guide vane and that adjacent fixed guide vane which has its side thereof directed toward the impeller disposed in opposed relation to said convexly-shaped side of said associated fixed guide vane, and when the reversible pump-turbine is to be operated as a turbine the leading end of said mobile vane is enabled to be retracted outwardly from said associated fixed guide vane and toward said adjacent fixed guide vane to form a passage between it and said trailing end of said associated fixed guide vane increasing the opening between said adjacent fixed guide vanes to the extent necessary to ensure suitable distribution of water over the impeller, and means operable to advance said mobile guide vanes to advance the leading ends thereof inwardly toward their associated fixed guide vanes to enable the machine to operate as a pump, and to retract the leading ends of said mobile guide vanes away from said associated fixed guide vanes to enable the machine to operate as a turbine, the leading ends of said mobile vanes being shorter than the distance between the opposed sides of said adjacent fixed guide vanes and said mobile vanes being of such length and so arranged in the distributor that they are unable to close the passageways between said adjacent fixed guide vanes, or to cooperate to close the distributor.
Claim 2
Dependent Claim
343 words
A reversible pump-turbine comprising a distributor including fixed guide vanes arranged in circumferentially spaced relation around the impeller of the turbine-pump and having outer convexly-shaped sides directed away from the impeller, mobile guide vanes, means for supporting each mobile guide vane intermediate its length for pivotal movement about a fixed axis located in adjacently spaced relation to the trailing end of an associated fixed guide vane, said location of such axis being such that when the reversible pump-turbine is to be operated as a pump the leading end of said mobile guide vane is enabled to be advanced inwardly toward and into contact with the inner trailing end of said associated fixed guide vane reducing the opening between said associated fixed guide vane and that adjacent fixed guide vane which has its side thereof directed toward the impeller disposed in opposed relation to said convexly-shaped side of said associated fixed guide vane, and when the reversible pump-turbine is to be operated as a turbine the leading end of said mobile vane is enabled to be retracted outwardly from said associated fixed guide vane and toward said adjacent fixed guide vane to form a passage between it and said trailing end of said associated fixed guide vane increasing the opening between said adjacent fixed guide vanes to the extent necessary to ensure suitable distribution of water over the impeller, and means operable to advance said mobile guide vanes to advance the leading ends thereof inwardly toward their associated fixed guide vanes to enable the machine to operate as a pump, and to retract the leading ends of said mobile guide vanes away from said associated fixed guide vanes to enable the machine to operate as a turbine, the leading ends of said mobile vanes being shorter than the distance between the opposed sides of said adjacent fixed guide vanes and said mobile vanes being of such length and so arranged in the distributor that they are unable to close the passageways between said adjacent fixed guide vanes, or to cooperate to close the distributor.
Claim 3
Dependent Claim
40 words
A turbine-pump as defined in claim 1, in which in the advanced position of the leading end of each movable guide vane, such leading end bears on the convex face of the trailing end of the associated fixed guide vane.
Claim 4
Dependent Claim
44 words
A turbine-pump as defined in claim 1, in which in the advanced position of the leading end of each movable guide vane, the outer side surface of such movable guide vane forms a continuation of the convexly-shaped side of the associated fixed guide vane.
Claim 5
Dependent Claim
36 words
A turbine-pump as defined in claim 3, in which said outer side surface of said movable guide vane is convexly-shaped and forms a strictly continuous profile with the convexly-shaped side of the associated fixed guide vane.
Claim 6
Dependent Claim
39 words
A turbine-pump as defined in claim 1, in which the terminus of the trailing end of the associated fixed guide vane is shaped to provide a slanting shoulder against which said leading end of the movable guide vane bears.
Claim 7
Dependent Claim
70 words
A turbine-pump as defined in claim 1, in which the surface of the leading end of each movable guide vane engageable with the surface of the trailing end of the associated fixed guide vane in the advanced position of such leading end, and said latter trailing end surface are configured to define a fluid passageway for by-passing additional flow of water in the retracted position of said movable guide vane.
References Cited (Backward Citations)
US1694481A
Cited
US1771711A
Cited
CH150697A
Cited
US2351516A
Cited
US2440825A
Cited
GB762406A
Cited
GB925968A
Cited
US3162421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |