US4028653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical equipment having radial cooling channels with means for guiding cooling fluid through the channels
Assignee: ABB Norden Holding AB
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Filing: 1976-04-01
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Granted: 1977-06-07
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Expires: 1996-04-01
Abstract
Abstract In electrical equipment having windings with radial channels therethrough, which may be formed by spacing coils apart in the axial direction, and which coils are spaced from the inner and outer insulating cylinders, there are provided alternately along the length of the device guide members which have head portions which fill the spaces between the coils and the insulating cylinders and fit against the insulating cylinders, together with downwardly projecting wedge-like tongues which provide spaces of gradual decreasing cross-section, the tongues over-lapping at least two of the passages so that the flowing coolant is distributed between the passages as equally as possible.
Inventors
- 👤 Tage Carlsson
- 👤 Wolfgang Lampe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:39
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/322; H01F27/08; H01F27/10; H01F27/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
In electrical equipment having inner and outer insulating cylinders and a winding between the cylinders having a plurality of passages therethrough axially spaced with respect to the cylinders for passage therethrough of a cooling fluid, the winding being separated from one of the cylinders by a space, and a cooling fluid guide member in said space having first and second surfaces and having an enlarged head filling the space, said head including upper and lower flanges engaging a layer of said winding for securing said guide member to the winding, one of said surfaces engaging against the cylinder, and having a wedge-formed projection extending axially from the head with respect to the cylinders by a distance at least equal to the axial distance between two of said passages, said projection having the second surface forming with the winding a space decreasing in area towards the head, whereby the flow of cooling fluid is distributed between such passages.
Claim 2
Dependent Claim
157 words
In electrical equipment having inner and outer insulating cylinders and a winding between the cylinders having a plurality of passages therethrough axially spaced with respect to the cylinders for passage therethrough of a cooling fluid, the winding being separated from one of the cylinders by a space, and a cooling fluid guide member in said space having first and second surfaces and having an enlarged head filling the space, said head including upper and lower flanges engaging a layer of said winding for securing said guide member to the winding, one of said surfaces engaging against the cylinder, and having a wedge-formed projection extending axially from the head with respect to the cylinders by a distance at least equal to the axial distance between two of said passages, said projection having the second surface forming with the winding a space decreasing in area towards the head, whereby the flow of cooling fluid is distributed between such passages.
Claim 3
Dependent Claim
33 words
In equipment as claimed in claim 1 having a winding formed of a plurality of layers with support members extending radially thereacross, said guide member extending angularly between two of such support members.
Claim 4
Dependent Claim
25 words
In equipment as claimed in claim 1, having both cylinders spaced from the winding, a plurality of such guide members arranged alternately along the winding.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |