Patent US3575528A successfully refreshed from Google Patents.
US3575528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine rotor cooling
Assignee: Motors Liquidation Co
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Filing: 1968-10-28
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Granted: 1971-04-20
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Expires: 1988-10-28
Abstract
Abstract Flow of cooling air through the rotor of a gas turbine is varied by a valve mounted in the rotor including a bimetal ring which warps as a function of temperature to vary an annular valve opening. Centrifugal force also may affect the valve to a desired extent.
Inventors
- 👤 Paul E Beam Jr
- 👤 Esten W Spears Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:20
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A turbine rotor comprising, in combination, an annular bladecarrying body mounted for rotation about its axis, a ring of hollow blades mounted on the body, means for conducting cooling fluid to the blades including means on the rotor defining an annular chamber with entrance means for cooling fluid and exit means for cooling fluid to the blades, and an annular valve member extending across the chamber between the entrance and exit means adapted to regulate flow of cooling fluid, the valve member being a bimetallic ring coaxial with the rotor adapted to flex in response to changes in the temperature of the ring, such flexion causing a change in clearance between the valve member and a wall of the chamber.
Claim 2
Dependent Claim
120 words
A turbine rotor comprising, in combination, an annular bladecarrying body mounted for rotation about its axis, a ring of hollow blades mounted on the body, means for conducting cooling fluid to the blades including means on the rotor defining an annular chamber with entrance means for cooling fluid and exit means for cooling fluid to the blades, and an annular valve member extending across the chamber between the entrance and exit means adapted to regulate flow of cooling fluid, the valve member being a bimetallic ring coaxial with the rotor adapted to flex in response to changes in the temperature of the ring, such flexion causing a change in clearance between the valve member and a wall of the chamber.
Claim 3
Dependent Claim
20 words
A rotor as recited in claim 1 including means to provide a circulation of cooling fluid over the valve member.
Claim 4
Dependent Claim
19 words
A rotor as recited in claim 2 in which the last-mentioned means includes a bypass around the valve member.
Claim 5
Dependent Claim
20 words
A rotor as recited in claim 2 in which the last-mentioned means is provided by holes through the valve member.
Claim 6
Dependent Claim
41 words
A rotor as recited in claim 1 in which the valve member is disposed so as to respond to centrifugal force due to rotation of the rotor to effect the clearance between the member and the said wall of the chamber.
Claim 7
Dependent Claim
14 words
A rotor as recited in claim 5 in which the valve member is dished.
Claim 8
Dependent Claim
15 words
A rotor as recited in claim 5 in which the valve member is substantially cylindrical.
Claim 9
Dependent Claim
126 words
A turbine rotor comprising, in combination, an annular body mounted for rotation about its axis, a ring of hollow blades mounted on the body, means for conducting cooling fluid to the blades including means on the rotor defining an annular chamber with entrance means for cooling fluid and exit means for cooling fluid to the blades, and an annular valve member extending across the chamber between the entrance and exit means adapted to regulate flow of cooling fluid, the valve member being a metallic ring coaxial with the rotor adapted to vary in form relative to the rotor in response to centrifugal force due to rotation of the rotor, such variation causing a change in clearance between the valve member and a wall of the chamber.
Claim 10
Dependent Claim
126 words
A turbine rotor comprising, in combination, an annular body mounted for rotation about its axis, a ring of hollow blades mounted on the body, means for conducting cooling fluid to the blades including means on the rotor defining an annular chamber with entrance means for cooling fluid and exit means for cooling fluid to the blades, and an annular valve member extending across the chamber between the entrance and exit means adapted to regulate flow of cooling fluid, the valve member being a metallic ring coaxial with the rotor adapted to vary in form relative to the rotor in response to centrifugal force due to rotation of the rotor, such variation causing a change in clearance between the valve member and a wall of the chamber.
Claim 11
Dependent Claim
37 words
A rotor as recited in claim 8 in which the valve member responds differentially to the rotor to temperature of the cooling fluid to effect the clearance between the member and the said wall of the chamber.
Claim 12
Dependent Claim
14 words
A rotor as recited in claim 8 in which the valve member is dished.
Claim 13
Dependent Claim
15 words
A rotor as recited in claim 8 in which the valve member is substantially cylindrical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |