CN105047383A - Anti-short circuit oil-immersed transformer body and fabrication method thereof - Google Patents
Anti-short circuit oil-immersed transformer body and fabrication method thereof Download PDFInfo
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- CN105047383A CN105047383A CN201510515253.7A CN201510515253A CN105047383A CN 105047383 A CN105047383 A CN 105047383A CN 201510515253 A CN201510515253 A CN 201510515253A CN 105047383 A CN105047383 A CN 105047383A
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Abstract
The invention relates to an anti-short circuit oil-immersed transformer body, which comprises an iron core and a coil, wherein a gap is formed between the iron core and the coil; the anti-short circuit oil-immersed transformer body is characterized in that a reinforcing material layer which winds around the periphery of the iron core is arranged in the gap; and the gap is also filled with an insulator capable of splicing the iron core, the reinforcing material layer and the coil into a whole. The invention further relates to a fabrication method of the transformer body. According to the transformer body provided by the invention, the iron core, the reinforcing material layer and the coil are spliced into a whole by the insulator, so that the global stability of the transformer body is enhanced; and the anti-short circuit ability of the transformer is enhanced. According to the fabrication method provided by the invention, the gap between the lower end of the coil and the iron core is filled with an end cap; the lower end of the gap is sealed by the end cap, so that injection of the insulator with the mobility from the upper end of the gap is facilitated; the preparation method is simple in technology and low in cost; and the market competitiveness of the anti-short circuit oil-immersed transformer body is enhanced to a certain extent.
Description
Technical field
The present invention relates to transformer technology field, specifically refer to a kind of Short Circuit withstand oil-filled transformer device body, the invention still further relates to the preparation method of this transformer body.
Background technology
Transformer is the vitals of composition electrical network, primarily of unshakable in one's determination and coil composition.Owing to there is gap between coil and iron core, poor stability, when being short-circuited, transformer interior loop is yielding, affects transformer and normally runs, and seriously causes transformer to burn.Guo Wang company has higher requirement to the anti-short circuit capability of transformer after proposing the requirement of sturdy power grid.
In order to solve the problem, the means adopted in prior art are generally insert fagging between coil and iron core, utilize fagging stretching coil, but, due to the uncertainty of gap length between coil and iron core, aforesaid way can not according to the even stretching coil of Theoretical Design, and due to fagging be supporting without on direction, instead of in whole interstice coverage inner support, cause not having the coil of the position of stretching to be subject to short-circuit force distortion.
Also have patent by coil around on skeleton, in the hope of solving the problem of coil uniform force, but such mode adds the production cost of transformer on the one hand, still there is the gap between skeleton and iron core on the other hand.Application publication number is a kind of method that Chinese invention patent application " a kind of assembly method of transformer body and structure " (application number: CN201410809137.1) of CN104576012A proposes resolver body steadiness, although it is more effective than prior art, but still there is the problem can not filling gap in dipping lacquer insufficient strength and operating process completely, the steadiness of its body of transformer still has much room for improvement.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, provides the Short Circuit withstand oil-filled transformer device body that a kind of steadiness is good, anti-short circuit capability is strong.
Another technical problem to be solved by this invention is the present situation for prior art, and provide a kind of preparation method of above-mentioned Short Circuit withstand oil-filled transformer device body, transformer body steadiness prepared by the method is good, anti-short circuit capability is strong.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of Short Circuit withstand oil-filled transformer device body, comprise iron core and coil, between described iron core and coil, there is gap, it is characterized in that: in described gap, be provided with the armature bed of material be wound around around periphery unshakable in one's determination, be also filled with in described gap and can make the bonding as a whole insulator of iron core, the armature bed of material and coil.
As improvement, the described armature bed of material comprises insulating barrier and reinforced layer, and described insulating barrier is wound around around periphery unshakable in one's determination and equal with the height of inside casing unshakable in one's determination, and described reinforced layer is wound around around insulating barrier periphery and equal with the height of coil.Adopt such structure, insulating barrier and reinforced layer all have insulation and strengthen the effect of transformer steadiness, insulating barrier is equal with the height of inwall unshakable in one's determination, highlights its insulating effect further, and reinforced layer is equal with the height of coil highlights its booster action further.
As preferably, between described coil lower end and the armature bed of material of periphery unshakable in one's determination, be provided with the plug that lower end, gap can be sealed.Adopt such structure, be convenient to unshakable in one's determination with the gap of coil in fill insulator.
Described insulator finger ring epoxy resins, insulating varnish or other insulating material that can solidify.
A preparation method for Short Circuit withstand oil-filled transformer device body, is characterized in that comprising the following steps:
(1) iron core is prepared, insulating barrier is formed at periphery unshakable in one's determination writhing number layer insulating material, the height of this insulating barrier is equal with the height of inside casing unshakable in one's determination, continues to form reinforced layer at insulating barrier periphery writhing number layer reinforcement material, and the height of this reinforced layer is equal with the height of coil;
(2) outer around to coil at reinforced layer, insert plug in the gap then between coil lower end and the insulating barrier of periphery unshakable in one's determination, to make the gap sealing between coil lower end and iron core;
(3) insulator of mobility is injected in gap from the slit aperture of coil and upper end unshakable in one's determination, make the insulator being full of mobility in gap, the transformer body assembled is put into vacuum drying room dry, after insulator solidification, take out transformer body.
As preferably, the insulating material described in step (1) is the one in cable paper, cardboard, DMD, film, and the thickness of insulating material is 0.04 ~ 1.5mm.
Preferably, grid cloth or the glass fabric of to be thickness the be 0.04 ~ 2mm of the reinforcement material described in step (1).
Preferably, the plug described in step (2) is gelatinous epoxy resin.Also other material of oil resistant, insulation can be adopted.
In such scheme, described gelatinous epoxy resin epoxy resin, curing agent, promoter, silicon powder is mixed according to weight ratio 1:1:0.1:2 ~ 3 and is heated to 75 ~ 85 DEG C, stir 0.5 ~ 2h to fully mixing, then be warming up to 85 ~ 130 DEG C of insulations to there is no mobility gained.
In above-mentioned each preferred version, described in step (3), insulator is the epoxy resin of mobility, the epoxy resin of this mobility refers to and epoxy resin, curing agent, promoter, silicon powder to be mixed according to weight ratio 1:1:0.1:2 ~ 3 and to be heated to 75 ~ 85 DEG C, stirs 0.5 ~ 2h to fully mixing gained.
Compared with prior art, the invention has the advantages that:
Transformer of the present invention is wound with the armature bed of material having insulating effect and booster action concurrently in periphery unshakable in one's determination, and insulator is filled with in the gap between unshakable in one's determination and coil, thus by as a whole for iron core, reinforced layer and coil bonding, add the steadiness of transformer body entirety, enhance the anti-short circuit capability of transformer;
Preparation method of the present invention is first wound with reinforced layer and coil outward successively at iron core, then plug is filled in the gap between coil lower end and iron core, lower end, gap seals by this plug, be convenient to the insulator injecting mobility from upper end, gap, after injection, baking and curing can utilize insulator by as a whole for iron core, reinforced layer and coil bonding, thus strengthens the steadiness of transformer body entirety; And this preparation method's technique is simple, cost is low, enhances the competitiveness of product in market to a certain extent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the vertical view of part B in Fig. 1;
Fig. 3 is the phantom along A-A direction in Fig. 2;
Fig. 4 is the partial enlarged drawing (being filled with the epoxy resin of mobility) in Fig. 3.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in figures 1-4, Fig. 1 shows a kind of three-phase transformer, and the transformer in the present embodiment also can be single-phase transformer, and the number of phases of transformer does not affect the structure of said transformer body in the present embodiment.
The Short Circuit withstand oil-filled transformer device body of the present embodiment comprises iron core 1, coil 2 and the armature bed of material 3, between unshakable in one's determination 1 and coil 2, there is gap 10, the armature bed of material 3 is arranged in gap 10, concrete, the armature bed of material 3 comprises insulating barrier 31 and reinforced layer 32, insulating barrier 31 by insulating material around 1 periphery writhing number layer gained unshakable in one's determination, insulating barrier 31 is equal with the height of 1 inside casing unshakable in one's determination, reinforced layer 32 is by reinforcement material around insulating barrier 31 periphery writhing number layer gained, and reinforced layer 32 is equal with the height of coil 2.Insulating material in the present embodiment can be the one in cable paper, cardboard, DMD, film, the thickness of insulating material is 0.04 ~ 1.5mm, DMD is specially the soft composite insulating foil of polyester film and polyester fibre non woven fabric, is the three-layer insulated material be composited by two layers polyester nonwoven fabrics therebetween one deck insulation polyester film.Grid cloth or the glass fabric of reinforcement material to be thickness be 0.04 ~ 2mm.Insulating barrier 31 and reinforced layer 32 all have insulation and strengthen the effect of transformer steadiness, and insulating barrier 31 is equal with the height of 1 inwall unshakable in one's determination, highlights its insulating effect further, and reinforced layer 32 is equal with the height of coil 2 highlights its booster action further.
Be filled with in gap 10 and can make iron core 1, the armature bed of material 3 and the bonding as a whole insulator of coil 2.Be provided with the plug 20 that lower end, gap 10 can be sealed between the armature bed of material 3 of coil 2 lower end and 1 periphery unshakable in one's determination to unshakable in one's determination 1 with the gap 10 of coil 2 in fill insulator.
In the present embodiment, the preparation method of Short Circuit withstand oil-filled transformer device body comprises the following steps:
(1) unshakable in one's determination 1 is prepared, insulating barrier 31 is formed at 1 periphery writhing number layer insulating material unshakable in one's determination, the height of this insulating barrier 31 is equal with the height of 1 inside casing unshakable in one's determination, continues to form reinforced layer 32 at insulating barrier 31 periphery writhing number layer reinforcement material, and the height of this reinforced layer 32 is equal with the height of coil 2;
(2) outer around to coil 2 at reinforced layer 32, gelatinous epoxy resin is inserted in the position, gap 10 then between coil 2 lower end and the insulating barrier 31 of 1 periphery unshakable in one's determination, forms the plug 20 that the gap 10 bottom coil 2 and between unshakable in one's determination 1 can be sealed;
Above-mentioned gelatinous epoxy resin epoxy resin, curing agent, promoter, silicon powder is mixed according to weight ratio 1:1:0.1:2 ~ 3 and is heated to 75 ~ 85 DEG C, stir 0.5 ~ 2h to fully mixing, then be warming up to 85 ~ 130 DEG C of insulations to there is no mobility gained;
(3) epoxy resin 100 of mobility is injected in gap 10 from coil 2 and 10 mouthfuls, the gap of 1 upper end unshakable in one's determination, make the epoxy resin 100 being full of mobility in gap 10, then with adhesive tape by end closure on gap 10, the transformer body assembled is put into vacuum drying room dry, after epoxy resin cure, take out transformer body tear adhesive tape;
The epoxy resin of above-mentioned mobility refers to and epoxy resin, curing agent, promoter, silicon powder to be mixed according to weight ratio 1:1:0.1:2 ~ 3 and to be heated to 75 ~ 85 DEG C, stirs 0.5 ~ 2h to fully mixing gained.
Claims (10)
1. a Short Circuit withstand oil-filled transformer device body, comprise iron core and coil, between described iron core and coil, there is gap, it is characterized in that: in described gap, be provided with the armature bed of material be wound around around periphery unshakable in one's determination, be also filled with in described gap and can make the bonding as a whole insulator of iron core, the armature bed of material and coil.
2. Short Circuit withstand oil-filled transformer device body according to claim 1, it is characterized in that: the described armature bed of material comprises insulating barrier and reinforced layer, described insulating barrier is wound around around periphery unshakable in one's determination and equal with the height of inside casing unshakable in one's determination, and described reinforced layer is wound around around insulating barrier periphery and equal with the height of coil.
3. Short Circuit withstand oil-filled transformer device body according to claim 1 and 2, is characterized in that: be provided with the plug that lower end, gap can be sealed between described coil lower end and the armature bed of material of periphery unshakable in one's determination.
4. Short Circuit withstand oil-filled transformer device body according to claim 1 and 2, is characterized in that: described insulator finger ring epoxy resins, insulating varnish or other insulating material that can solidify.
5. a preparation method for Short Circuit withstand oil-filled transformer device body, is characterized in that comprising the following steps:
(1) iron core is prepared, insulating barrier is formed at periphery unshakable in one's determination writhing number layer insulating material, the height of this insulating barrier is equal with the height of inside casing unshakable in one's determination, continues to form reinforced layer at insulating barrier periphery writhing number layer reinforcement material, and the height of this reinforced layer is equal with the height of coil;
(2) outer around to coil at reinforced layer, insert plug in the gap then between coil lower end and the insulating barrier of periphery unshakable in one's determination, to make the gap sealing between coil lower end and iron core;
(3) insulator of mobility is injected in gap from the slit aperture of coil and upper end unshakable in one's determination, make the insulator being full of mobility in gap, the transformer body assembled is put into vacuum drying room dry, after insulator solidification, take out transformer body.
6. the preparation method of Short Circuit withstand oil-filled transformer device body according to claim 5, is characterized in that: the insulating material described in step (1) is the one in cable paper, cardboard, DMD, film.
7. the preparation method of Short Circuit withstand oil-filled transformer device body according to claim 5, is characterized in that: grid cloth or the glass fabric of to be thickness the be 0.04 ~ 2mm of the reinforcement material described in step (1).
8. the preparation method of Short Circuit withstand oil-filled transformer device body according to claim 5, is characterized in that: the plug described in step (2) is gelatinous epoxy resin.
9. the preparation method of Short Circuit withstand oil-filled transformer device body according to claim 8, it is characterized in that: described gelatinous epoxy resin epoxy resin, curing agent, promoter, silicon powder is mixed according to weight ratio 1:1:0.1:2 ~ 3 and is heated to 75 ~ 85 DEG C, stir 0.5 ~ 2h to fully mixing, then be warming up to 85 ~ 130 DEG C of insulations to there is no mobility gained.
10. the preparation method of Short Circuit withstand oil-filled transformer device body according to claim 5, it is characterized in that: the insulator described in step (3) is the epoxy resin of mobility, the epoxy resin of this mobility refers to and epoxy resin, curing agent, promoter, silicon powder to be mixed according to weight ratio 1:1:0.1:2 ~ 3 and to be heated to 75 ~ 85 DEG C, stirs 0.5 ~ 2h to fully mixing gained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510515253.7A CN105047383B (en) | 2015-08-20 | 2015-08-20 | A kind of resistance to shorting oil-immersed transformer device body and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510515253.7A CN105047383B (en) | 2015-08-20 | 2015-08-20 | A kind of resistance to shorting oil-immersed transformer device body and preparation method thereof |
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| CN105047383A true CN105047383A (en) | 2015-11-11 |
| CN105047383B CN105047383B (en) | 2018-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113130190A (en) * | 2021-03-18 | 2021-07-16 | 上海波亮电器制造有限公司 | Air-core reactor, manufacturing equipment and manufacturing method thereof |
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| CN105047383B (en) | 2018-05-08 |
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