US4352034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator core with axial and radial cooling for dynamoelectric machines wth air-gap stator windings
Assignee: General Electric Co
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Filing: 1980-12-22
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Granted: 1982-09-28
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Expires: 2000-12-22
Abstract
Abstract A stator core for a dynamoelectric machine comprises a plurality of coaxially aligned annular module sections with axial cooling passages therethrough. The modules are spaced apart and fluid coupling means are disposed between the aligned axial passages in adjacent modules in a selective fashion to provide cooling flow paths which are both axially and radially directed.
Inventors
- 👤 Barry L. Karhan
- 👤 James B. Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; H02K1/00; H02K1/06; H02K1/12; H02K1/20; H02K9/00; H02K9/10; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877; Y10S505/878
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A gas-cooled stator core for a dynamoelectric machine, especially a machine exhibiting a high air-gap magnetic flux, said core comprising: a plurality of annular modules each including a a plurality of laminations arranged coaxially, the exterior surfaces of boundary laminations of said modules possessing radially oriented struts and circumferential struts affixed to the planar surfaces thereof so as to maintain an axial separation between said modules, said modules also possessing axially directed passages therethrough, said passages being similarly arranged in each module so as to permit partial axial gas flow through said core; means for selectively coupling less than all of said adjacently aligned passages in adjacent modules; and means for selectively closing other passages to provide combined partialcircumferential, partial axial and partial radial gas cooling flow paths through said core.
Claim 2
Dependent Claim
131 words
A gas-cooled stator core for a dynamoelectric machine, especially a machine exhibiting a high air-gap magnetic flux, said core comprising: a plurality of annular modules each including a a plurality of laminations arranged coaxially, the exterior surfaces of boundary laminations of said modules possessing radially oriented struts and circumferential struts affixed to the planar surfaces thereof so as to maintain an axial separation between said modules, said modules also possessing axially directed passages therethrough, said passages being similarly arranged in each module so as to permit partial axial gas flow through said core; means for selectively coupling less than all of said adjacently aligned passages in adjacent modules; and means for selectively closing other passages to provide combined partialcircumferential, partial axial and partial radial gas cooling flow paths through said core.
Claim 3
Dependent Claim
45 words
The stator core of claim 1 in which said selective coupling means comprises a plurality of insertable collars disposed between the aligned passages of adjacent modules, each of said collars having a lip extending into said passage so as to hold the same in position.
Claim 4
Dependent Claim
32 words
The stator core of claim 1 in which said laminations comprise a radially outer metallic portion and a radially inner nonmetallic portion having nonmetallic teeth extending therefrom in a radially inner direction.
Claim 5
Dependent Claim
55 words
The stator core of claim 2 in which at least some of said collars are closed over to provide a plurality of gas blocking plugs disposed between aligned passages of adjacent modules, so as to provide means partially blocking axial passage of cooling gas and the boundary lamination of said module becomes a blocking lamination.
Claim 6
Dependent Claim
20 words
The stator core of claim 4 in which said closed collars comprise blocking laminations with passage-defining holes in selected locations.
Claim 7
Dependent Claim
47 words
The stator core of claim 5 further including: a surrounding pressurizable housing with interior supports and baffles so as to divide the core into several regions, so that a cooling fluid can be made to flow radially inward in some regions and radially outward in other regions.
Claim 8
Dependent Claim
28 words
The stator core of claim 6 in which said housing possesses at least one duct for supplying cooling fluid to a central region surrounding said coaxially arranged modules.
Claim 9
Dependent Claim
15 words
The stator core of claim 1 in which said laminations comprise a unitary metallic structure.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |