US3734639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine cooling
Assignee: Motors Liquidation Co
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Filing: 1968-01-25
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Granted: 1973-05-22
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Expires: 1988-01-25
Abstract
Abstract A gas turbine engine in which the hotter parts of the engine are cooled by circulation of a cold fuel. The fuel cools parts of the combustion chamber wall, the exhaust duct, the struts which extend across the exhaust duct, and the nozzle vanes and turbine wheel, including the turbine blades. This is a regenerative cooling system, since the heat imparted to the fuel is recovered in the combustion and expansion processes. The turbine wheel cooling embodies a circuit in which cold fuel flows radially outward of both faces of the turbine wheel, radially outward in the leading portion of the turbine blades, radially inward in the trailing portion of the turbine blades, and radially inward behind the turbine wheel to the coolant outlet. Preferably the fluid is vaporized in effecting the cooling.
Inventors
- 👤 F Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:29
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/185; F02C7/16; F02C7/22; F02C7/224; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
153 words
A turbine rotor comprising, in combination, a wheel having a rim, an annular row of hollow blades mounted on and extending from the rim, supply and return conduits for a coolant terminating adjacent the wheel at the wheel axis, a first annular shroud on one face of the wheel defining with the wheel a chamber connected to and supplied from the supply conduit, means within the blades providing a coolant circulation loop having an entrance connected to the said chamber and having an exit, second and third mutually spaced annular shrouds on the other face of the wheel defining between them a coolant return path connecting the blade coolant circulation loops to the coolant return conduit, the second shroud being between the wheel and the third shroud and defining a wheel cooling space with the wheel, and means connecting the wheel cooling space to the coolant supply conduit and the coolant return conduit.
Claim 2
Dependent Claim
153 words
A turbine rotor comprising, in combination, a wheel having a rim, an annular row of hollow blades mounted on and extending from the rim, supply and return conduits for a coolant terminating adjacent the wheel at the wheel axis, a first annular shroud on one face of the wheel defining with the wheel a chamber connected to and supplied from the supply conduit, means within the blades providing a coolant circulation loop having an entrance connected to the said chamber and having an exit, second and third mutually spaced annular shrouds on the other face of the wheel defining between them a coolant return path connecting the blade coolant circulation loops to the coolant return conduit, the second shroud being between the wheel and the third shroud and defining a wheel cooling space with the wheel, and means connecting the wheel cooling space to the coolant supply conduit and the coolant return conduit.
Claim 3
Dependent Claim
21 words
A rotor as recited in claim 1 in which the said first and third shrouds are removably mounted on the wheel.
Claim 4
Dependent Claim
21 words
A rotor as recited in claim 2 including tension members mutually coupling the peripheral portions of the first and third shrouds.
Claim 5
Dependent Claim
158 words
A high temperature turbomachine including a row of fluid directing airfoil members exposed to hot motive fluid, each airfoil member having a leading edge, a trailing edge, and two sides extending from the leading edge to the trailing edge, the airfoil member being hollow so as to define an internal cavity between the sides, two walls extending spanwise of the airfoil member from side to side so as to divide the cavity into three passages, one adjacent the leading edge, one adjacent the trailing edge, and an intermediate passage between the other two passages, means for distributing a cooling fluid into the leading edge and intermediate passages at one end of the airfoil member for flow spanwise through the member, means connecting the leading eDge and intermediate passages to the trailing edge passage at the other end of the airfoil member, and means providing an outlet for the cooling fluid at the said one end of the airfoil.
Claim 6
Dependent Claim
158 words
A high temperature turbomachine including a row of fluid directing airfoil members exposed to hot motive fluid, each airfoil member having a leading edge, a trailing edge, and two sides extending from the leading edge to the trailing edge, the airfoil member being hollow so as to define an internal cavity between the sides, two walls extending spanwise of the airfoil member from side to side so as to divide the cavity into three passages, one adjacent the leading edge, one adjacent the trailing edge, and an intermediate passage between the other two passages, means for distributing a cooling fluid into the leading edge and intermediate passages at one end of the airfoil member for flow spanwise through the member, means connecting the leading eDge and intermediate passages to the trailing edge passage at the other end of the airfoil member, and means providing an outlet for the cooling fluid at the said one end of the airfoil.
Claim 7
Dependent Claim
18 words
A turbomachine as recited in claim 4 in which the said connecting means is within the airfoil member.
Claim 8
Dependent Claim
28 words
A turbomachine as recited in claim 4 including an annular shroud connected to the said other end of each airfoil member, the shroud defining the said connecting means.
Claim 9
Dependent Claim
21 words
A turbomachine as recited in claim 4 in which the distributing means includes metering orifices providing entrances to the said passages.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |