US3751182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide vanes for supersonic turbine blades
Assignee: Westinghouse Electric Corp
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Filing: 1971-08-20
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Granted: 1973-08-07
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Expires: 1991-08-20
Abstract
Abstract Guide vanes are installed between blades of the last stage of blading of a large steam turbine to form converging-diverging openings to minimize losses in this portion of the turbine. The guide vanes are fastened to adjacent blades through a shroud ring and through a lashing ring to connect the blades in such a manner as to reduce vibration and allow thermal expansion of the rotating blade assembly.
Inventors
- 👤 R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:45
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/22; F01D9/00; F01D9/02; F01D9/04; F01D9/041; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A turbine having a rotor and an annular array of circumferentially spaced rotatable blades fastened to said rotor, said blades having a shroud ring, a lashing ring and guide vanes disposed therebetween and cooperatively associated therewith to connect adjacent blades to minimize flow losses, to reduce vibration therein and to provide for thermal expansion of said rotor and blades, one end of each guide vane being fastened to one adjacent blade through the shroud ring, and the other end of each guide vane being fastened to the other adjacent blade through the lashing ring.
Claim 2
Dependent Claim
94 words
A turbine having a rotor and an annular array of circumferentially spaced rotatable blades fastened to said rotor, said blades having a shroud ring, a lashing ring and guide vanes disposed therebetween and cooperatively associated therewith to connect adjacent blades to minimize flow losses, to reduce vibration therein and to provide for thermal expansion of said rotor and blades, one end of each guide vane being fastened to one adjacent blade through the shroud ring, and the other end of each guide vane being fastened to the other adjacent blade through the lashing ring.
Claim 3
Dependent Claim
112 words
A turbine having a rotor and an annular array of circumferentially spaced rotatable blades fastened to said rotor, said blades having a shroud ring, a lashing ring and guide vanes disposed therebetween and cooperatively associated therewith to connect adjacent blades to minimize flow losses, to reduce vibration therein and to provide for thermal expansion of said rotor and blades, each guide vane being fastened to one adjacent blade through the shroud ring and being in slidable engagement with said one adjacent blade through the lashing ring, and being fastened to the other adjacent blade through the lashing ring and being in slidable engagement with the other adjacent blade through the shroud ring.
Claim 4
Dependent Claim
112 words
A turbine having a rotor and an annular array of circumferentially spaced rotatable blades fastened to said rotor, said blades having a shroud ring, a lashing ring and guide vanes disposed therebetween and cooperatively associated therewith to connect adjacent blades to minimize flow losses, to reduce vibration therein and to provide for thermal expansion of said rotor and blades, each guide vane being fastened to one adjacent blade through the shroud ring and being in slidable engagement with said one adjacent blade through the lashing ring, and being fastened to the other adjacent blade through the lashing ring and being in slidable engagement with the other adjacent blade through the shroud ring.
Claim 5
Dependent Claim
38 words
A turbine as set forth in claim 2, wherein the shroud ring has disposed therein means for allowing relative radial movement of the guide vane with respect to one adjacent blade and to prevent relative axial movement therebetween.
Claim 6
Dependent Claim
38 words
A turbine as set forth in claim 2, wherein the lashing ring has disposed therein means for allowing relative radial movement of the guide vane with respect to one adjacent blade and for preventing relative axial movement therebetween.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |