US3914630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat removal apparatus for dynamoelectric machines
Assignee: Westinghouse Electric Corp
•
Filing: 1973-10-23
•
Granted: 1975-10-21
•
Expires: 1993-10-23
Abstract
Abstract A dynamoelectric machine has a hollow shaft for transferring heat from within a rotor of the machine to a finned heat remover. The finned heat remover is rotated by separate power, in close relationship with respect to the shaft. A lubricant in a porous bushing maintains a heat transfer relationship between the rotating finned heat remover and the shaft. A fluid within the hollow shaft evaporates at the hot end of the shaft which is radially inwardly of the rotor. The evaporated fluid then passes through the hollow portion of the shaft to its cooler end where it condenses, giving off heat to the finned heat remover. The condensed liquid then returns to the hot end and repeats the evaporative condensing cycle.
Inventors
- 👤 Wayne B Lloyd
- 👤 Dale R Logan
- 👤 Yu-Sun Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/22; H02K9/225
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
Apparatus for removing heat from a dynamoelectric machine comprising a housing, a stator and a rotor; said appparatus for removing heat comprising an elongated heat conductable hollow shaft having a wick therein, said shaft having an evaporator end and a condenser end, said rotor being fixedly attached to said evaporator end of said shaft, a finned heat remover rotatably disposed about the condenser end of said shaft, said rotor conducting heat to said fixedly attached hollow shaft, said hollow shaft having a fluid therein that condenses at the finned heat remover end, said condensed fluid passing through said wick member in said hollow shaft to the evaporative end where said fluid evaporates within said shaft, said fluid receiving heat from said rotor and passing as a gas through the center of said shaft to the condenser end to renew the condensation evaporation cycle, said finned heat remover rotating about said hollow shaft in a heat transfer relationship, said finned heat remover being rotated by a power source separate from the dynamoelectric machine.
Claim 2
Dependent Claim
172 words
Apparatus for removing heat from a dynamoelectric machine comprising a housing, a stator and a rotor; said appparatus for removing heat comprising an elongated heat conductable hollow shaft having a wick therein, said shaft having an evaporator end and a condenser end, said rotor being fixedly attached to said evaporator end of said shaft, a finned heat remover rotatably disposed about the condenser end of said shaft, said rotor conducting heat to said fixedly attached hollow shaft, said hollow shaft having a fluid therein that condenses at the finned heat remover end, said condensed fluid passing through said wick member in said hollow shaft to the evaporative end where said fluid evaporates within said shaft, said fluid receiving heat from said rotor and passing as a gas through the center of said shaft to the condenser end to renew the condensation evaporation cycle, said finned heat remover rotating about said hollow shaft in a heat transfer relationship, said finned heat remover being rotated by a power source separate from the dynamoelectric machine.
Claim 3
Dependent Claim
61 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said heat transfer relationship between said rotating finned heat remover and said hollow shaft includes a liquid lubricant interface therebetween, said lubricant being disposed in a porous bushing, said finned heat remover rotating with respect to said hollow shaft to force additional cooling air over said machine.
Claim 4
Dependent Claim
21 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said dynamoelectric machine comprises an electric motor.
Claim 5
Dependent Claim
22 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said finned heat remover includes helical disposed fins.
Claim 6
Dependent Claim
22 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said fluid in said hollow shaft comprises sodium.
Claim 7
Dependent Claim
34 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said wick comprises an inner meshed spiral screen of stainless steel disposed about the inner walls of said hollow shaft.
Claim 8
Dependent Claim
31 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 1, wherein said hollow shaft has a palladium getter tube disposed in the condenser end of said hollow shaft.
Claim 9
Dependent Claim
22 words
Apparatus for removing heat from a dynamoelectric machine as recited in claim 2, wherein said fluid in said hollow shaft comprises water.
References Cited (Backward Citations)
US2330121A
Cited
US3078805A
Cited
US3135211A
Cited
US3150277A
Cited
US3318253A
Cited
US3517730A
Cited
US3441757A
Cited
US3610975A
Cited
US3765480A
Cited
US3700551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |