Patent US976207A successfully refreshed from Google Patents.
Patent US3740596A successfully refreshed from Google Patents.
US3740596A
Expired / Lapsed
US
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Liquid cooled rotor for dynamoelectric machines
Assignee: Westinghouse Electric Corp
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Filing: 1971-09-21
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Granted: 1973-06-19
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Expires: 1991-09-21
Abstract
Abstract A liquid cooled rotor for dynamoelectric machines in which a coolant liquid such as water circulates through passages in the rotor and is discharged through an axial bore and radial passages in the rotor shaft, and in which flow restricting arrangement are provided in the radial passages for controlling the flow of liquid due to the self-pumping action of the radial passages and for improving the pumping action, the flow restricting arrangement having a curved and convergent orifice which changes the direction of the discharged liquid from radial to a direction approaching the tangential and opposite to the direction of rotation of the rotor.
Inventors
- 👤 L Curtis
- 👤 S Ying
- 👤 G Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
H; H02; H02K; H02K9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
In a rotor member for a dynamoelectric machine, said rotor member having passages for circulation of a liquid coolant therethrough, said passages including an axial passage and opposed radial passages communicating with the axial passage and extending to the surface of the rotor for discharging liquid therefrom, and means in each of said radial passages for restricting the flow of liquid therethrough and discharging the liquid in a non-radial direction approaching the tangential and opposite to the direction of rotation of the rotor.
Claim 2
Dependent Claim
83 words
In a rotor member for a dynamoelectric machine, said rotor member having passages for circulation of a liquid coolant therethrough, said passages including an axial passage and opposed radial passages communicating with the axial passage and extending to the surface of the rotor for discharging liquid therefrom, and means in each of said radial passages for restricting the flow of liquid therethrough and discharging the liquid in a non-radial direction approaching the tangential and opposite to the direction of rotation of the rotor.
Claim 3
Dependent Claim
24 words
The combination defined in claim 1 in which the restricting means has a curved discharge passage which converges in size toward the discharge exit.
Claim 4
Dependent Claim
47 words
The combination defined in claim 1 in which said flow restricting means comprises a plug member secured in each radial passage adjacent the surface of the rotor, each plug member having an orifice extending therethrough adapted to restrict the flow of liquid and to change its direction.
Claim 5
Dependent Claim
33 words
The combination defined in claim 3 in which said orifice is a curved passage which changes direction from substantially radial at the entrance to a direction approaching the tangential at the discharge exit.
Claim 6
Dependent Claim
17 words
The combination defined in claim 3 in which said orifice converges in area toward the discharge exit.
Claim 7
Dependent Claim
21 words
The combination defined in claim 4 in which said orifice decreases in diameter from the entrance end to the discharge exit.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |