US4159562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for securing winding components in the slot of a rotary electric machine
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1977-10-12
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Granted: 1979-07-03
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Expires: 1997-10-12
Abstract
Abstract A method of securing one or more insulated winding components in the slots of a rotary electrical machine against any displacement during operation in which one or more inserts which have a deformable and heat-hardenable characteristic such as is established by a fibrous material impregnated with a heat-hardenable resin in the B-state, are inserted in the slot in contact with the adjoining side of a winding component. The winding components and non-hardened inserts are then subjected to pressure to effect a deformation matching any tolerance irregularity in the profile of the adjacent surface of the winding component, this step being followed by a gradual heating of the inserts while still under pressure so as to harden the same, and the entrance to the slot is then closed in the usual manner by insertion of a wedge.
Inventors
- 👤 Gabor Liptak
- 👤 Roland Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:20
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
The method of securing insulated winding components in the slots of a rotary electrical machine against displacement which includes the steps of substantially filling the slot with the insulated winding components, there being included in the slot at least one deformable and heat-hardenable insert in contact with an adjoining side of one of the winding components, subjecting the winding components and non-hardened insert to pressure applied at the entrance of the slot thereby to effect a deformation thereof to match any tolerance irregularity in the profile of the adjacent surface of the winding component, heating the insert while under pressure to harden the same, and closing off the entrance to the slot by means of a wedge after completion of the insert hardening operation.
Claim 2
Independent Claim
124 words
The method of securing insulated winding components in the slots of a rotary electrical machine against displacement which includes the steps of substantially filling the slot with the insulated winding components, there being included in the slot at least one deformable and heat-hardenable insert in contact with an adjoining side of one of the winding components, subjecting the winding components and non-hardened insert to pressure applied at the entrance of the slot thereby to effect a deformation thereof to match any tolerance irregularity in the profile of the adjacent surface of the winding component, heating the insert while under pressure to harden the same, and closing off the entrance to the slot by means of a wedge after completion of the insert hardening operation.
Claim 3
Dependent Claim
46 words
The method as defined in claim 1 for securing insulated winding components in the slots of a rotary electrical machine wherein the step of heating the insert under pressure is carried out at a temperature gradient of from 1 to 5° K/h and preferably 2° K/h.
Claim 4
Dependent Claim
44 words
The method as defined in claim 1 for securing insulated winding components in the slots of a rotary electrical machine wherein the step of subjecting the non-hardened insert to pressure is carried out at a pressure of from 200 to 400 N/cm 2 .
Claim 5
Dependent Claim
48 words
The method as defined in claim 1 for securing insulated winding components in the slots of a rotary electrical machine wherein said deformable and heat-hardenable insert includes a strip of hard material and a layer of deformable and heat hardenable material applied to at least one side thereof.
Claim 6
Dependent Claim
43 words
The method as defined in claim 4 for securing insulated winding components in the slots of a rotary electrical machine wherein said layer of deformable and heat hardenable material is comprised of a fibrous substance impregnated with a heat-hardenable resin in the B-state.
Claim 7
Dependent Claim
25 words
The method as defined in claim 5 wherein the fibrous substance in said layer of deformable and hardenable material is constituted by a glass fabric.
Claim 8
Dependent Claim
25 words
The method as defined in claim 5 wherein the fibrous substance in said layer of deformable and hardenable material is constituted by a glass fleece.
Claim 9
Dependent Claim
25 words
The method as defined in claim 5 wherein the fibrous substance in said layer of deformable and hardenable material is constituted by a polyester fleece.
Claim 10
Dependent Claim
21 words
The method as defined in claim 5 wherein the impregnating heat-hardenable resin included in said material is of the polyester type.
Claim 11
Dependent Claim
21 words
The method as defined in claim 5 wherein the impregnating heat-hardenable resin included in said material is of the epoxide type.
Claim 12
Dependent Claim
28 words
The method as defined in claim 4 wherein said strip of hard material comprises a fiber-reinforced material such as a glass impregnated with a synthetic resin and hardened.
Claim 13
Dependent Claim
44 words
The method as defined in claim 4 wherein the height of said deformable and heat hardenable material is greater than one half the depth of any irregularities which may exist in the surface of the adjacent winding component, and smaller than two-fold such depth.
Claim 14
Dependent Claim
36 words
The method as defined in claim 4 wherein said layer of deformable and heat hardenable material is applied to only one side of said strip of hard material, the opposite side of said strip being planar.
Claim 15
Dependent Claim
22 words
The method as defined in claim 13 wherein the planar surface of said strip of hard material is coated with a lubricant.
Claim 16
Dependent Claim
23 words
The method as defined in claim 14 wherein the lubricant on the planar surface of said strip of hard material is a silicone.
Claim 17
Dependent Claim
28 words
The method as defined in claim 14 wherein the lubricant on the planar surface of said strip of hard material is a fluoride wax in an organic solvent.
Claim 18
Dependent Claim
30 words
The method as defined in claim 4 wherein said deformable and heat hardenable insert is coated with an elastic varnish comprising a base of silicone and a filling of graphite.
Claim 19
Dependent Claim
28 words
The method as defined in claim 4 wherein said strip of hard material comprises a fiber-reinforced material such as a polyester impregnated with a synthetic resin and hardened.
Claim 20
Dependent Claim
31 words
The method as defined in claim 4 wherein said deformable and heat hardenable insert is coated with an elastic varnish comprising a base of silicone and a filling of lamp black.
Claim 21
Dependent Claim
30 words
The method as defined in claim 4 wherein said deformable and heat hardenable insert is coated with an elastic varnish comprising a base of polyurethane and a filling of graphite.
Claim 22
Dependent Claim
31 words
The method as defined in claim 4 wherein said deformable and heat hardenable insert is coated with an elastic varnish comprising a base of polyurethane and a filling of lamp black.
References Cited (Backward Citations)
US3391294A
Cited
US3952406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |