CN101599676B - Stripping method of stator coil - Google Patents
Stripping method of stator coil Download PDFInfo
- Publication number
- CN101599676B CN101599676B CN200910054136XA CN200910054136A CN101599676B CN 101599676 B CN101599676 B CN 101599676B CN 200910054136X A CN200910054136X A CN 200910054136XA CN 200910054136 A CN200910054136 A CN 200910054136A CN 101599676 B CN101599676 B CN 101599676B
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- mould
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- polyester film
- stator coil
- silicone grease
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- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention provides a stripping method of a stator coil. The stripping method of the stator coil is characterized by comprising the following concrete steps that: firstly, the stator coil after vacuum pressure impregnation treatment is half lapped with a polytetrafluoroethylene film and then is half lapped with a polyester film to obtain a coating coil; a mixture layer of silicone grease and gasoline is coated and brushed on the surface of a mould; a layer of polyester film layer is laid on the surface of the mould; the coating coil is put into the mould and is wrapped with the polyester film layer, and the polyester film layer is fixed by using a transparent rubber belt; and mould combination is carried out from the middle of the mould to both ends. The invention has the advantages that by adding a layer of polyester film between the coil and the mould in the mould pressing process, the problem of the stripping of a generator VPI stator coil is effectively solved, the effect is good, and the major insulation of the coil is protected from being influenced; and by the invention, the stripping process can be successfully carried out, the operation is more convenient, the use quantity of the silicone grease is reduced, and the hidden danger of safe production is removed.
Description
Technical field
The present invention relates to a kind of novel release method of stator coil, be used to make few glue VPI (vacuum pressure impregnation processing) the stator coil molded curing of generator after the demoulding easier, avoid winding deformation to cause insulating impaired, belong to technical field of generators.
Background technology
In the high-rating generator field, the insulation of stator coil is directly connected to the operational reliability of generator, life-span and technical-economic index, belongs to core component.At present, one of large-sized electricity generator stator coil main insulation technological development direction is attenuate main insulation gradually, improves conductive coefficient, improves the generator operation economic index.
After the few glue main insulation wrapping of large-sized electricity generator stator coil is finished, need VPI to handle, on mould, carry out molded curing then, be cooled to proper temperature behind the molded curing after, needing to break away from from mould be the demoulding.Carry out smoothly for the assurance demoulding, need prevent that stator coil and mould from bonding together.Original stripping means is at coil surface half-stack package polytetrafluoroethylene film (thick and thick each one deck of 0.1mm of 0.05mm) and 0.5mm thick polyester film before the coil molded curing, and be coated with the mixture (silicone grease and gasoline weight ratio 2: 1) of last layer silicone grease and gasoline at die surface, but owing to have resin to flow to die surface in the coil solidification process, along with coil sticks together coil and mould after together solidifying, influence carrying out smoothly of the demoulding.
Original stripping means shortcoming has: 1) stripping result is undesirable, mass of coil is produced bigger influence, after the attenuate that particularly insulate; 2) can produce a large amount of micelle and silicone grease after the coil demoulding, if can not remove totally and can exert an influence to the next group mass of coil; 3) silicone grease is scattered in mill floor and can brings hidden danger to safety in production.
Carry out smoothly for the demoulding of realization generator VPI stator coil, must develop novel stripping means, make coil unaffected, easier carrying out in the knockout course quality.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can effectively stop the impaired novel release method of insulation in the VPI stator coil knockout course.
In order to achieve the above object, technical scheme of the present invention has provided a kind of stator coil release method, it is characterized in that,
Concrete steps are:
The first step: the thick polytetrafluoroethylene film of the stator coil half-stack package 0.1mm of elder generation after will handling through vacuum pressure impregnation, the polyester film that half-stack package 0.05mm is thick obtains coating coil again;
Second step: at the mixture layer of die surface brushing silicone grease and gasoline, wherein, the weight ratio of silicone grease and gasoline is 1: 2 in the mixture layer of described silicone grease and gasoline; At the thick laminated polyester film of die surface tiling one deck 0.05mm of the mixture layer that scribbles silicone grease and gasoline, the length of laminated polyester film is identical with mould, and width coats the Zhou Changda 30mm of coil section;
The 3rd step: will coat coil and put into mould, with laminated polyester film wraparound coating coil, with the fixing laminated polyester film of adhesive tape;
The 4th step: in the middle of mould, begin to the two ends matched moulds.
Advantage of the present invention is: 1) effectively solve generator VPI stator coil release problems by in mold process, between coil and mould, having increased one deck polyester film, and respond well, protected coil main insulation unaffected; 2) by the invention enables knockout course to carry out smoothly, more convenient operation has reduced the consumption of silicone grease, has got rid of the hidden danger of safety in production.
Description of drawings
Fig. 1 is a kind of stator coil demoulding schematic diagram.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
As shown in Figure 1, be a kind of stator coil demoulding schematic diagram, the release method of described stator coil is:
The first step: the thick polytetrafluoroethylene film of the stator coil half-stack package 0.1mm of elder generation after will handling through vacuum pressure impregnation, the polyester film that half-stack package 0.05mm is thick obtains coating coil 1 again;
Second step: at the thick silicone grease of mould 5 external coatings 0.05～0.2mm and the mixture layer 2 of gasoline, wherein, the weight ratio of silicone grease and gasoline is 1: 2 in the mixture layer 2 of described silicone grease and gasoline; At the thick laminated polyester film 3 of mould 5 surface tiling one deck 0.05mm of the mixture layer 2 that scribbles silicone grease and gasoline, the length of laminated polyester film 3 is identical with mould 5, and width coats the Zhou Changda 30mm of coil 1 cross section;
The 3rd step: will coat coil 1 and put into mould 5, and coat coil 1, and use fixedly laminated polyester film 3 of adhesive tape 4 with laminated polyester film 3 wraparounds;
The 4th step: pour resin in the middle of the mould 5 and begin matched moulds, treat that resin flows out after, again with the two ends matched moulds of mould 5.
Claims (1)
1. a stator coil release method is characterized in that, concrete steps are:
The first step: the thick polytetrafluoroethylene film of the stator coil half-stack package 0.1mm of elder generation after will handling through vacuum pressure impregnation, the polyester film that half-stack package 0.05mm is thick obtains coating coil (1) again;
Second step: at the mixture layer (2) of mould (5) external coating silicone grease and gasoline, wherein, the weight ratio of silicone grease and gasoline is 1: 2 in the mixture layer of described silicone grease and gasoline (2); At the thick laminated polyester film (3) of mould (5) surface tiling one deck 0.05mm of the mixture layer that scribbles silicone grease and gasoline (2), the length of laminated polyester film (3) is identical with mould (5), and width coats the Zhou Changda 30mm of coil (1) cross section;
The 3rd step: will coat coil (1) and put into mould (5), and coat coil (1), and use fixedly laminated polyester film (3) of adhesive tape (4) with laminated polyester film (3) wraparound;
The 4th step: pour resin in the middle of the mould (5) and begin matched moulds, treat that resin flows out after, again with the two ends matched moulds of mould (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910054136XA CN101599676B (en) | 2009-06-30 | 2009-06-30 | Stripping method of stator coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910054136XA CN101599676B (en) | 2009-06-30 | 2009-06-30 | Stripping method of stator coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101599676A CN101599676A (en) | 2009-12-09 |
| CN101599676B true CN101599676B (en) | 2011-07-13 |
Family
ID=41420977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910054136XA Active CN101599676B (en) | 2009-06-30 | 2009-06-30 | Stripping method of stator coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101599676B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882846B (en) * | 2010-06-30 | 2012-07-04 | 上海电气电站设备有限公司 | Method for forming end insulation of stator coil by vacuum pressure impregnation |
| CN101916649B (en) * | 2010-09-13 | 2012-07-04 | 无锡亿能电力设备有限公司 | Demoulding mechanism of poured coil |
| CN105269723A (en) * | 2014-07-23 | 2016-01-27 | 贵州航天林泉电机有限公司 | Liquid release agent and application thereof |
| EP3419150B1 (en) | 2017-06-22 | 2020-02-19 | General Electric Company | Stator bar mold insert |
| CN114123691B (en) * | 2021-10-30 | 2022-11-08 | 中国长江动力集团有限公司 | Nimble detachable VPI device |
-
2009
- 2009-06-30 CN CN200910054136XA patent/CN101599676B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101599676A (en) | 2009-12-09 |
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