US3609059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isothermal wheel
Assignee: Motors Liquidation Co
•
Filing: 1969-10-03
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Granted: 1971-09-28
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Expires: 1989-10-03
Abstract
Abstract A rotor wheel for a compressor operating at relatively high temperatures is made up of two disks enclosing a cavity between them and mounting blades at the rim of the wheel. A scoop tube projecting into the air path deflects air into the cavity within the wheel, within which it circulates and is exhausted near the rim of the wheel at the lower pressure face of the wheel. The circulating air reduces temperature gradients between the hot rim and the hub portion of the wheel.
Inventors
- 👤 Joseph A Wagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:55
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/021; F01D5/085; F01D5/087; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/321; F04D29/58; F04D29/582; F04D29/584; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
A rotor stage for a turbomachine including a wheel with means for reducing temperature gradients in the wheel comprising, in combination, generally parallel front and rear disks, an inner portion, and a rim portion, the aforementioned defining a wheel with an annular cavity between the disks extending from the inner portion to the rim portion, a ring of blades mounted on and extending radially from the rim portion, gas inlet means defined by scoop means projecting from the rim portion adapted to intercept gas flowing between the blades and direct it into the said cavity, and outlet means for the gas from the cavity defined by the wheel at the lower pressure face of the wheel near the rim portion, so that the intercepted gas is directed in a circuit between the disks inwardly from the inlet means to the inner portion and then outwardly to the outlet means due to differential density and centrifugal force so that the gas so circulated acts as a heat transfer medium to transfer heat to the radially inner portion of the wheel and thus reduce radial thermal gradients in the wheel.
Claim 2
Dependent Claim
188 words
A rotor stage for a turbomachine including a wheel with means for reducing temperature gradients in the wheel comprising, in combination, generally parallel front and rear disks, an inner portion, and a rim portion, the aforementioned defining a wheel with an annular cavity between the disks extending from the inner portion to the rim portion, a ring of blades mounted on and extending radially from the rim portion, gas inlet means defined by scoop means projecting from the rim portion adapted to intercept gas flowing between the blades and direct it into the said cavity, and outlet means for the gas from the cavity defined by the wheel at the lower pressure face of the wheel near the rim portion, so that the intercepted gas is directed in a circuit between the disks inwardly from the inlet means to the inner portion and then outwardly to the outlet means due to differential density and centrifugal force so that the gas so circulated acts as a heat transfer medium to transfer heat to the radially inner portion of the wheel and thus reduce radial thermal gradients in the wheel.
Claim 3
Dependent Claim
29 words
A stage as recited in claim 1 in which the blades have roots mounted in the wheel and the scoop means is mounted on one or more blade roots.
Claim 4
Dependent Claim
21 words
A stage as recited in claim 1 including also thermal insulation on the exterior of the inner portion of the wheel.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |