CN108461261A - A kind of dry-type power transformer with high-tear strength - Google Patents
A kind of dry-type power transformer with high-tear strength Download PDFInfo
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- CN108461261A CN108461261A CN201810070862.XA CN201810070862A CN108461261A CN 108461261 A CN108461261 A CN 108461261A CN 201810070862 A CN201810070862 A CN 201810070862A CN 108461261 A CN108461261 A CN 108461261A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/204—Di-electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Insulating Bodies (AREA)
- Organic Insulating Materials (AREA)
Abstract
The present invention provides a kind of dry-type power transformers with high-tear strength, upper fixing element including winding assembly, set on winding assembly top and the lower fixing piece set on winding assembly bottom end, winding assembly includes iron core, low pressure winding and high-voltage winding on iron core, insulating paper is equipped between low pressure winding and high-voltage winding, insulating paper includes double-layer structure：Nonwoven layer and high temperature resistance polyester film layer are not easy to be layered between nonwoven layer and high temperature resistance polyester film layer using jointing material bonding；Nonwoven layer includes 5 30wt% aramid fibrids, 60 80wt% aramid pulps and 10 15wt% aramid staple fibers.The dry-type power transformer with high-tear strength of the present invention, due to the dielectricity of jointing material and polyester film, jointly so that insulating paper reaches preferable insulation effect；Using the polyester film that surface is smooth, when being put into motor, reduces the friction between motor, ensure the work quality of motor.
Description
Technical field
The present invention relates to power transformer equipment technical field more particularly to a kind of dry-type powers with high-tear strength
Transformer.
Background technology
Currently, the dry-type power transformer design of the prior art is unreasonable, insulation performance is poor, and loss is high, noise is big, ring
It is poor to protect effect, to affect the electric property and mechanical performance of transformer in use, shortens the use of transformer
Service life；Therefore, people will recognize that is added a kind of insulating paper in transformer, and the insulating capacity of transformer is improved with this；Insulation
Paper can be used as slot insulation, turn-to-turn and the layer insulation of middle and small motor, the liner insulation heart and transformer insulated.It sells on the market at present
Insulating paper level it is various, however multilayer insulation paper is mostly used greatly for the use of insulating paper in micromotor, such as：Three layers absolutely
Edge paper, four layers of insulating paper etc. are put into multilayer, waste material, and one layer of insulating paper cannot also meet since its insulation effect is poor
The demand of people.
Such as Chinese patent CN103325548A discloses a kind of non-packed dry type power transformer, including winding assembly,
Lower fixing piece set on the upper fixing element on the winding assembly top and set on the winding assembly bottom end, the winding assembly
Low pressure winding and high-voltage winding including iron core, on the iron core, are equipped between the low pressure winding and high-voltage winding
Nomex insulating papers, the low pressure winding and high-voltage winding are through H grades of solvent-free insulated paint vacuum pressure impregnations.Wherein, the technology
The Nomex insulating papers used in scheme are Conventional insulation paper used at present, also prodigious for insulation performance
Room for promotion.
Such as Chinese Patent Application No. discloses a kind of low noise dry-type transformer for 201410678408.4 again, installs bottom
There are three windings, the upper and lower ends of winding to be respectively arranged with upper clamping piece and lower clamping piece, the interior peace of lower clamping piece for installation side by side for the upper end of seat
Equipped with cooling blower, low-pressure line-outgoing copper bar and HV Terminal are installed on upper clamping piece, high-voltage tap head is provided on front side of winding, it is high
It is connected by high pressure connecting rod between pressure side and winding, the lower end of mounting seat is installed with array by bolt assembly and subtracts
Device is shaken, the lower end of damper is installed with iron plate, and iron plate lower end is installed with rubber shock-absorbing cushion block.The technical solution increases
Sound-absorbing material reduces noise when transformer work, however for insulation performance, do not carry out great change
It is kind.
Invention content
To overcome insulating paper use cost existing in the prior art big, insulation performance does not protrude and not tender practical joke takes into account
The problem of improving other performance indicators, the present invention provides a kind of dry-type power transformers with high-tear strength.
The technical solution adopted by the present invention is：A kind of dry-type power transformer with high-tear strength, including winding group
Part, the lower fixing piece set on the upper fixing element on the winding assembly top and set on the winding assembly bottom end, the winding
Component includes iron core, low pressure winding and high-voltage winding on the iron core, between the low pressure winding and high-voltage winding
Equipped with insulating paper, innovative point is：The insulating paper includes double-layer structure：Nonwoven layer and high temperature resistance polyester film layer, institute
It states and is not easy to be layered using jointing material bonding between nonwoven layer and high temperature resistance polyester film layer；The nonwoven layer includes 5-
30wt% aramid fibrids, 60-80wt% aramid pulps and 10-15wt% aramid staple fibers.
The nonwoven layer is adhered to by the jointing material on the high temperature resistance polyester film layer one side therein,
The another side of the high temperature resistance polyester film layer is stained with a nano protective film layer, and the thickness of the nano protective film layer is
1.0-1.8mm；The main material of the nano protective film layer is nano-aluminium oxide.
In some embodiments, the nano protective film layer constituent is 70-90 parts of nano-aluminium oxide, nanometer
0.8-1.1 parts of zirconium oxide, 0.6-1.2 parts of nano zine oxide, 0.9-1.4 parts of nano-titanium oxide, 2.2-3.4 parts of epoxy resin.
In some embodiments, the nonwoven layer is poly- comprising 20wt% aramid fibrids, 70wt% aromatics
Amide paper pulp and 10wt% aramid staple fibers.
In some embodiments, the aramid fibrid is para-aramid fiber.
In some embodiments, the aramid staple fiber is para-aramid staple fiber.
In some embodiments, the aramid pulp is the para-aramid paper with 0.5-6mm length
Slurry.
In some embodiments, the thickness of the nonwoven layer is 0.06mm.
In some embodiments, the raw material of the high temperature resistance polyester film layer are polyethylene terephthalate,
The thickness of the high temperature resistance polyester film layer is 0.06-1.80mm.
In some embodiments, the coating thickness of the jointing material is 0.186~0.196mm.
In some embodiments, the production method of the insulating paper is：First in the high temperature resistance polyester film layer
The jointing material is uniformly smeared in front, by the tiling of ready nonwoven layer to uniformly filling the described resistance to of the jointing material
It is flattened behind the front of high-temperature polyester film layer；It is then placed in baking oven and is toasted, taken out after solidification crystallization；Again in the resistance to height
The reverse side of warm laminated polyester film uniformly fills the jointing material；It is placed again into baking oven and is toasted, taken out after solidification crystallization,
Heatproof temperature is made of the insulating paper of 280-350 degree at this time.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) dry-type power transformer with high-tear strength of the invention, due to Jie of jointing material and polyester film
Electrically, jointly so that insulating paper reaches preferable insulation effect；Using the polyester film that surface is smooth, when being put into motor, subtract
Lack the friction between motor, ensures the work quality of motor.
(2) dry-type power transformer with high-tear strength of the invention, nonwoven layer are poly- comprising 5-30wt% aromatics
Amid fibers, 60-80wt% aramid pulps and 10-15wt% aramid staple fibers.Therefore, to nonwoven layer
Component part be optimized, compared to other combinations, the dielectric strength (being indicated with kV/mm) of non-woven fabrics of the present invention and stretch
Index is greatly improved, that is to say, that nonwoven layer of the invention has good tearing strength.
(3) dry-type power transformer with high-tear strength of the invention gives best numerical value cooperation, can obtain
To best tearing strength and tensile strength, and ensure good insulation preformance, during the entire service life of transformer all
Keep extremely good electric property and mechanical performance.
(4) dry-type power transformer with high-tear strength of the invention, the considered critical composition thickness of each layer, subtracts
Few electrical loss, improves marginal capacity, increases safety and reliability, and reduce the dosage of its material and insulating paper, to reduce
Product size reduces cost, however, most important purpose is, the hardness of the thickness effect insulating paper of each layer, resilience, whether
It is easy to insert the performances such as embedding, in the present invention, each layer thickness finally determined ensure that insulating paper can keep former strong under 280 degree
90% or so of degree persistently remains to keep 80% or so of original intensity using 600h under the conditions of 300 degree, under the conditions of 350 degree
100h is persistently used, remains to keep 65% or so of original intensity, therefore, heat resistance and electric property are all than more prominent.
Description of the drawings
Fig. 1 is the dry-type power transformer structural schematic diagram that the present invention has high-tear strength；
Fig. 2 is the structural schematic diagram of winding assembly of the present invention.
Specific implementation mode
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific examples are only used to explain the present invention, is not intended to limit the present invention.
The present invention discloses a kind of dry-type power transformers with high-tear strength, as shown in Figure 1：Including winding assembly
1a, the upper fixing element 2a set on the tops the winding assembly 1a and the lower fixing piece 3a set on the bottom ends the winding assembly 1a,
The winding assembly 1a includes iron core 4a, the low pressure winding 5a on the iron core 4a and high-voltage winding 6a, the low pressure
Insulating paper 7a is equipped between winding 5a and high-voltage winding 6a, as the inventive point of the present invention, in this embodiment party of the present invention
In formula, the insulating paper 7a includes double-layer structure：Nonwoven layer and high temperature resistance polyester film layer, the nonwoven layer and high temperature resistant
It is not easy to be layered using jointing material bonding between laminated polyester film；In the present invention, due to Jie of jointing material and polyester film
Electrically, jointly so that insulating paper reaches preferable insulation effect；Using the polyester film that surface is smooth, when being put into motor, subtract
Lack the friction between motor, ensures the work quality of motor.As it is further preferred that the present invention this embodiment in,
The nonwoven layer includes 5-30wt% aramid fibrids, 60-80wt% aramid pulps and 10-15wt% virtues
Polyamide staple fiber.In the present invention, the component part of nonwoven layer is optimized, compared to other combinations, the present invention
The dielectric strength (being indicated with kV/mm) and tensile figure of non-woven fabrics are greatly improved, that is to say, that nothing of the invention
Woven fabric layer has good tearing strength.
As it is further preferred that in this embodiment of the present invention, the nonwoven layer is poly- comprising 20wt% aromatics
Amid fibers, 70wt% aramid pulps and 10wt% aramid staple fibers.The present invention gives best numbers
Value cooperation can obtain best tearing strength and tensile strength, and ensure good insulation preformance, in the entire of transformer
Extremely good electric property and mechanical performance are all kept during service life.
Specifically, in this embodiment of the present invention, the nonwoven layer is adhered to described by the jointing material
On high temperature resistance polyester film layer one side therein, the another side of the high temperature resistance polyester film layer is stained with one nanometer of protection
The thickness of film layer, the nano protective film layer is 1.0-1.8mm；The main material of the nano protective film layer aoxidizes for nanometer three
Two aluminium.
Specifically, in this embodiment of the present invention, the nano protective film layer constituent is that nanometer three aoxidizes two
7090 parts of aluminium, 0.81.1 parts of nano zircite, 0.61.2 parts of nano zine oxide, 0.9-1.4 parts of nano-titanium oxide, epoxy resin
2.2-3.4 part.In the present invention, the addition of nanometer protective layer makes primarily to ensureing that insulating paper has efficient insulating properties
It obtains insulating paper and reaches preferable insulation effect；And in the present invention, in order to preferably ensure the insulation performance hair of nanometer protective layer
It waves, the present invention focuses on the raising and improvement of the wear-resisting property of nanometer protective layer, and therefore, the present invention specifies nano protective film layer
Component, the micro addition of nano zircite, nano zine oxide, nano-titanium oxide and epoxy resin, makes the hardened layer of film surface
Reach 9H, it is wear-resisting to be subjected to 0000# steel wools, using the pressure of 5kg, rub 100 times back and forth or more, do not have in anti-scratch layer surface
There is cut, the scratch resistant abrasion resistant effect of the nano protective film is extremely excellent.
Specifically, in this embodiment of the present invention, the aramid fibrid is that para-aramid class is fine
Dimension.The aramid staple fiber is para-aramid staple fiber.The aramid pulp is with 0.5-6mm long
The para-aramid paper pulp of degree.Select the insulating paper of above-mentioned fiber, insulating paper is non-aging, it is resistance to contraction and it is incompressible, in addition
Elastic force extra-heavy even if after it is hereby ensured that transformers using the several years, coil still holding structure is close, and is capable of short circuit
Pressure.In addition, using the smooth polyester film in surface, when being put into motor, reduce the friction between motor, the work of micromotor
Make quality.
In test, it was noticed that the thickness of each composition of insulating paper, mechanical performance to insulating paper itself and electrical
Performance has a very big impact, and therefore, in this embodiment of the present invention, the thickness of the nonwoven layer is 0.06mm；Into
One step, the raw material of the high temperature resistance polyester film layer are polyethylene terephthalate, the high temperature resistance polyester film
The thickness of layer is 0.06-1.80mm, and further, the coating thickness of the jointing material is 0.186~0.196mm.In this hair
In bright, the considered critical composition thickness value or thickness range of each layer can effectively reduce transformer electrical loss, improve transformer
Marginal capacity increases safety and reliability, and reduces the dosage of its material and insulating paper, to reduce product size, reduces
Cost, however, most important purpose is, whether the hardness of the thickness effect insulating paper of each layer resilience, is easy to insert the property such as embedding
Can, in the present invention, each layer thickness finally determined, the hardness height of insulating paper, resilience are good, are easy to slotting embedding, ensure that insulation
Paper can keep 90% or so of former intensity under 280 degree, persistently remain to keep original intensity using 600h under the conditions of 300 degree
80% or so, under the conditions of 350 degree persistently use 100h, remain to keep 65% or so of original intensity, therefore, heat resistance and
Electric property is all than more prominent.
It is a further object of the present invention to provide the production methods of above-mentioned insulating paper：
The jointing material is uniformly smeared in the front of the high temperature resistance polyester film layer first, by ready non-woven fabrics
It is flattened after layer tiling to the front for the high temperature resistance polyester film layer for uniformly filling the jointing material；It is then placed in baking oven
(baking temperature is 60 degree, baking time 10min) is toasted, is taken out after solidification crystallization；It is thin in the high temperature resistance polyester again
The reverse side of film layer uniformly fills the jointing material；It is placed again into baking oven and is toasted that (baking temperature is 100 degree, when baking
Between be 3min), solidification crystallization after take out, heatproof temperature is made of the insulating paper of 280-350 degree at this time.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations, modification and
Environment, and can be changed by the above teachings or related fields of technology or knowledge in the scope of the invention is set forth herein
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of the claims.
Claims (10)
1. a kind of dry-type power transformer with high-tear strength, including winding assembly (1a), it is set to the winding assembly
The upper fixing element (2a) on the top (1a) and the lower fixing piece (3a) for being set to the bottom end the winding assembly (1a), the winding assembly
(1a) includes iron core (4a), the low pressure winding (5a) on the iron core (4a) and high-voltage winding (6a), the low pressure around
Insulating paper (7a) is equipped between group (5a) and high-voltage winding (6a), it is characterised in that：The insulating paper (7a) includes double-layer structure：
Nonwoven layer and high temperature resistance polyester film layer are bonded between the nonwoven layer and high temperature resistance polyester film layer using jointing material
It is not easy to be layered；The nonwoven layer include 5-30wt% aramid fibrids, 60-80wt% aramid pulps and
10-15wt% aramid staple fibers；
The nonwoven layer is adhered to by the jointing material on the high temperature resistance polyester film layer one side therein, described
The another side of high temperature resistance polyester film layer is stained with a nano protective film layer, and the thickness of the nano protective film layer is 1.0-
1.8mm；The main material of the nano protective film layer is nano-aluminium oxide.
2. the dry-type power transformer according to claim 1 with high-tear strength, it is characterised in that：The nanometer is protected
Cuticular layer constituent is 70-90 parts of nano-aluminium oxide, 0.8-1.1 parts of nano zircite, nano zine oxide 0.6-1.2
Part, 0.9-1.4 parts of nano-titanium oxide, 2.2-3.4 parts of epoxy resin.
3. the dry-type power transformer according to claim 1 with high-tear strength, it is characterised in that：The non-woven fabrics
Layer includes 20wt% aramid fibrids, 70wt% aramid pulps and 10wt% aramid staple fibers.
4. the dry-type power transformer according to claim 1 or 3 with high-tear strength, it is characterised in that：The virtue
Polyamide fiber is para-aramid fiber.
5. the dry-type power transformer according to claim 1 or 3 with high-tear strength, it is characterised in that：The virtue
Polyamide staple fiber is para-aramid staple fiber.
6. the dry-type power transformer according to claim 1 or 3 with high-tear strength, it is characterised in that：The virtue
Polyamide paper pulp is the para-aramid paper pulp with 0.5-6mm length.
7. the dry-type power transformer according to claim 6 with high-tear strength, it is characterised in that：The non-woven fabrics
The thickness of layer is 0.06mm.
8. the dry-type power transformer according to claim 6 with high-tear strength, it is characterised in that：The high temperature resistant
The raw material of laminated polyester film are polyethylene terephthalate, and the thickness of the high temperature resistance polyester film layer is 0.06-
1.80mm。
9. the dry-type power transformer according to claim 6 with high-tear strength, it is characterised in that：The bonding material
The coating thickness of material is 0.186~0.196mm.
10. the dry-type power transformer according to claim 9 with high-tear strength, it is characterised in that：The insulation
The production method of paper (7a) is：The jointing material is uniformly smeared in the front of the high temperature resistance polyester film layer first, it will be accurate
It is flattened after the nonwoven layer tiling to the front for the high temperature resistance polyester film layer for uniformly filling the jointing material got ready；So
After be put into baking oven and toasted, taken out after solidification crystallization；Again institute is uniformly filled in the reverse side of the high temperature resistance polyester film layer
State jointing material；It is placed again into baking oven and is toasted, taken out after solidification crystallization, heatproof temperature is the exhausted of 280-350 degree at this time
Edge paper is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070862.XA CN108461261A (en) | 2018-01-24 | 2018-01-24 | A kind of dry-type power transformer with high-tear strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070862.XA CN108461261A (en) | 2018-01-24 | 2018-01-24 | A kind of dry-type power transformer with high-tear strength |
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| CN108461261A true CN108461261A (en) | 2018-08-28 |
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ID=63238923
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| CN201810070862.XA Pending CN108461261A (en) | 2018-01-24 | 2018-01-24 | A kind of dry-type power transformer with high-tear strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741938A (en) * | 2018-12-21 | 2019-05-10 | 苏州太湖电工新材料股份有限公司 | A method of preparing the epoxy PET insulating cylinder for the dry-type transformer that is suitable for casting |
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| CN204054840U (en) * | 2014-07-29 | 2014-12-31 | 湖北云峰绝缘材料有限公司 | Insulating paper |
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| JPH0869937A (en) * | 1994-08-31 | 1996-03-12 | Osaka Denki Co Ltd | Manufacture of welding transformer for resistance welding |
| CN102452206A (en) * | 2010-11-01 | 2012-05-16 | 常熟市鑫特都制衣有限公司 | Multifunctional nanometer fiber fabric |
| CN104798144A (en) * | 2012-11-23 | 2015-07-22 | 帝人芳纶有限公司 | Electrical insulating paper |
| CN103325548A (en) * | 2013-07-22 | 2013-09-25 | 江苏源通电气有限公司 | Non-encapsulated dry type power transformer |
| CN204054840U (en) * | 2014-07-29 | 2014-12-31 | 湖北云峰绝缘材料有限公司 | Insulating paper |
| CN105216392A (en) * | 2015-11-18 | 2016-01-06 | 南通中菱绝缘材料有限公司 | Insulating paper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741938A (en) * | 2018-12-21 | 2019-05-10 | 苏州太湖电工新材料股份有限公司 | A method of preparing the epoxy PET insulating cylinder for the dry-type transformer that is suitable for casting |
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