US3936681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling arrangement for electric generators of underwater power plants
Assignee: Siemens AG
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Filing: 1973-11-16
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Granted: 1976-02-03
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Expires: 1993-11-16
Abstract
Abstract A cooling arrangement is provided for an electric generator of an underwater power plant contained in a body wherein a coolant is circulated for cooling the generator. The cooling arrangement includes a cowl that covers the end-face of the generator and forms a portion of the body. The outer surface of the cowl is exposed to the turbine water and the inner surface of the cowl defines a path for conducting the coolant therealong for recooling the coolant. A plurality of cooling fins are provided and each of the fins has two end-portions bent toward each other to give the fin a hook-like configuration. Each fin is fixedly mounted to the inner surface of the cowl at one of the end-portions thereof. The fins are short relative to the length of the path.
Inventors
- 👤 Wolfgang Liebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
F; F03; F03B; F03B13/00; F03B13/10; F03B13/105; H; H02; H02K; H02K7/00; H02K7/18; H02K7/1807; H02K7/1823; H02K9/00; H02K9/10; H02K9/12; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
In an underwater electric generator contained in a body wherein coolant is circulated for cooling the generator, a cooling arrangement including a cowl covering the end-face of the generator and forming a portion of the body, the outer surface of the cowl being exposed to the turbine water and the inner surface of the cowl defining an arcuate path for conducting the coolant therealong for recooling the coolant, the improvement in said cooling arrangement comprising: a plurality of cooling fins, each of the fins being made from a flat member and having two end-portions bent toward each other to give the fin a hook-like configuration, each of the fins being fixedly mounted to the inner surface of the cowl at one of said end-portions thereof and being short relative to the length of the path.
Claim 2
Dependent Claim
135 words
In an underwater electric generator contained in a body wherein coolant is circulated for cooling the generator, a cooling arrangement including a cowl covering the end-face of the generator and forming a portion of the body, the outer surface of the cowl being exposed to the turbine water and the inner surface of the cowl defining an arcuate path for conducting the coolant therealong for recooling the coolant, the improvement in said cooling arrangement comprising: a plurality of cooling fins, each of the fins being made from a flat member and having two end-portions bent toward each other to give the fin a hook-like configuration, each of the fins being fixedly mounted to the inner surface of the cowl at one of said end-portions thereof and being short relative to the length of the path.
Claim 3
Dependent Claim
24 words
The cooling arrangement of claim 1, said cooling fins being arranged with their flat surfaces parallel to the direction of flow of the coolant.
Claim 4
Dependent Claim
35 words
The cooling arrangement of claim 1, said cooling fins being arranged one behind the other in the direction of the flow of the coolant, each succeeding fin being displaced with respect to the preceding fin.
Claim 5
Dependent Claim
20 words
The cooling arrangement of claim 3, said cooling fins being arranged parallel to the direction of flow of the coolant.
Claim 6
Dependent Claim
43 words
The cooling arrangement of claim 1, said cooling fins being arranged into a plurality of groups one behind the other, the cooling fins of each of the groups being displaced relative to the cooling fins of the immediate preceding group of cooling fins.
Claim 7
Dependent Claim
20 words
The cooling arrangement of claim 5, said cooling fins being arranged parallel to the direction of flow of the coolant.
Claim 8
Dependent Claim
46 words
The cooling arrangement of claim 1, the end-portions of each of said cooling fins defining respective leg portions of the fin, one of said leg portions being longer than the other one of said leg portions, said longer leg portions being fixedly attached to the cowl.
Claim 9
Dependent Claim
19 words
The cooling arrangement of claim 1, said cooling fins being made of a material having good heat conductive quality.
Claim 10
Dependent Claim
14 words
The cooling arrangement of claim 8 wherein said cooling fins are made of copper.
References Cited (Backward Citations)
US1373002A
Cited
GB737990A
Cited
US2634375A
Cited
FR1022783A
Cited
DE1280392B
Cited
DE1218050B
Cited
US3476180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |