CN206947139U - Insulation encapsulated transformer and its high pressure winding skeleton - Google Patents

Insulation encapsulated transformer and its high pressure winding skeleton Download PDF

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Publication number
CN206947139U
CN206947139U CN201720847980.8U CN201720847980U CN206947139U CN 206947139 U CN206947139 U CN 206947139U CN 201720847980 U CN201720847980 U CN 201720847980U CN 206947139 U CN206947139 U CN 206947139U
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China
Prior art keywords
skeleton
pressure winding
high pressure
retaining wall
wall
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CN201720847980.8U
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Chinese (zh)
Inventor
温飞
薛军
贾月超
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SHENZHEN PRC ELMMEDICARE MEDICAL ELECTRONIC INSTRUMENT CO Ltd
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SHENZHEN PRC ELMMEDICARE MEDICAL ELECTRONIC INSTRUMENT CO Ltd
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Priority to CN201720847980.8U priority Critical patent/CN206947139U/en
Priority to PCT/CN2017/094895 priority patent/WO2019010731A1/en
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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
    • H01F27/325—Coil bobbins
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

The utility model discloses a kind of high pressure winding skeleton, the skeleton is the straight tubular construction of both ends insertion, and at least radial direction extension from the outer wall of described skeleton one end along the skeleton is formed with the retaining wall of straight tubular construction.The utility model discloses a kind of insulation encapsulated transformer.By above-mentioned embodiment, the insulation path of insulator interface is effectively increased, it improves the complexity and injection molding difficulty without increase skeleton injection mold, while saves material, while the insulating properties of transformer are improved, reduces cost.

Description

Insulation encapsulated transformer and its high pressure winding skeleton
Technical field
The structure design and technique that the utility model is related to insulation encapsulated transformer manufacture, more particularly to a kind of insulation encapsulated Transformer and its high pressure winding skeleton.
Background technology
Insulation encapsulated transformer is a kind of dry-type transformer of special construction, is mainly used in a variety of high-tension apparatuses and high pressure Instrument.
The main member of transformer is armature winding, secondary windings, skeleton, insulation system and iron core（Magnetic core）.Insulation fills The effect of envelope is the space for making solid insulating material fill up between winding, skeleton and iron core, improves transformer in high-pressure work bar Dielectric strength under part.The advantages of solid insulating material is dielectric strength height, and major defect is that insulation is once damaged, can not Recover.In insulation encapsulated transformer insulation structure, the interface that can be formed between different materials between skeleton and Embedding Material.Such as Fruit forms chemical bond crosslinking between different insulating materials molecules, is insulated along the dielectric strength at interface and two kinds of materials weaker The dielectric strength ratio of material, it is essentially identical.But consider actual dosing technology, under the working condition of most of product, embedding Material and other insulating materials are intermolecular simply partly to form chemical bond, while miscellaneous caused by production environment interface is unclean The defects of matter, micro-bubble, dielectric strength of the real material interface along interface are far below the dielectric strength of material.As long as interface It is not vertical with direction of an electric field, it is easy for occurring along interface shelf depreciation, causes insulation constantly to decline, aging, until breakdown.
The high pressure Winding Design of conventional high-tension transformer is passed through frequently with layer coiling.The advantages of layer coiling is turn-to-turn voltage Low, voltage between layers is easily separated, and turn-to-turn insulation, layer insulation easily solve, and skeleton structure is simple, can make straight tube shape, such as Shown in Fig. 1.Straight tube skeleton can be molded production, and mould and production cost are relatively low.
Straight tube skeleton is in high-tension transformer using extensive.Current insulation encapsulated design of transformer, straight tube skeleton are enclosed on On iron core, skeleton one end contacts with iron core, the other end contacts with secondary framework, and winding and iron core or secondary framework is exhausted after embedding Edge is on the interface between Embedding Material and skeleton, and interface length is exactly air line distance of the winding to side iron core, such as Fig. 2 institutes Show.Therefore, using the insulation encapsulated transformer of such a design, only using longer core window and longer skeleton, insulation Intensity just can guarantee that, cause volume of transformer bigger than normal, cost is higher.
Utility model content
The utility model provides a kind of insulation encapsulated transformer and its high pressure winding skeleton, energy to solve above-mentioned technical problem The insulation path of insulator interface is enough effectively increased, it improves the complexity and injection molding hardly possible without increase skeleton injection mold Degree, while material is saved, while the insulating properties of transformer are improved, reduce cost.
In order to solve the above technical problems, the utility model provides a kind of high pressure winding skeleton, the skeleton penetrates for both ends Straight tubular construction, the radial direction extension at least from the outer wall of described skeleton one end along the skeleton is formed with straight tube shape The retaining wall of structure.
Further, extend from the outer wall at the skeleton both ends respectively along the radial direction of the skeleton formed with an institute State retaining wall.
Further, two of the skeleton both ends mutually symmetrical structures of retaining wall.
Further, the outside of the retaining wall and the end face of the skeleton.
Further, axial direction of the end face of described skeleton one end formed with the retaining wall along skeleton further prolongs Stretch the step for being formed with straight tubular construction；The roof of the step between outer wall and the skeleton of the skeleton inwall it Between.
Further, the wall thickness n of the skeleton is 4mm；The high pressure winding and the retaining wall being wound on the skeleton Length L1 between inner side is 1mm, and the height L2 in the radially inside direction of the retaining wall is 4mm, and the retaining wall is in axial side Upward length L3 is 3mm, and the height L4 in the direction radially outside of the retaining wall is 7mm, and the step is in the axial direction Length L5 be 2mm.
Further, the outside of the retaining wall does not flush close to the end face of the skeleton, but with the end face of the skeleton.
Further, the skeleton is skeleton made of PBT material.
In order to solve the above technical problems, the utility model also provides a kind of insulation encapsulated transformer, including：Iron core；And two End insertion is in the low pressure winding skeleton of straight barrel type；Also include：The both ends insertion described in any one embodiment is in straight barrel type as described above High pressure winding skeleton；Wherein, the high pressure winding skeleton and the low pressure winding skeleton it is end to end on the same line and Alignment, the iron core passes through the high pressure winding skeleton and the low pressure winding skeleton, and the high pressure winding skeleton is set The one end for having retaining wall is connected on the iron core；It is arranged with the high pressure winding skeleton of high pressure winding and is arranged with low pressure winding The low pressure winding skeleton and the iron core between gap embedding insulating materials formed insulating barrier.
Further, the insulating materials for forming the insulating barrier is epoxy resin.
Insulation encapsulated transformer of the present utility model and its high pressure winding skeleton, have the advantages that：
By radially extending to form retaining wall in skeleton outer wall, due to retaining wall presence so that in skeleton in the radial direction SI semi-insulation path is added, therefore the insulation path of insulator interface is effectively increased compared to prior art skeleton structure, its The complexity and injection molding difficulty without increase skeleton injection mold are improved, while saves material, is improving transformer While insulating properties, cost is reduced.
Brief description of the drawings
Fig. 1 is the structural representation of prior art high pressure winding skeleton.
Fig. 2 is sectional structure chart of the transformer formed using skeleton shown in Fig. 1 along A-A directions.
Fig. 3 is the structural representation of the utility model high pressure winding skeleton.
Fig. 4 is sectional structure chart of the transformer formed using skeleton shown in Fig. 3 along B-B directions.
Embodiment
The utility model is described in detail with embodiment below in conjunction with the accompanying drawings.
Refering to Fig. 3 and Fig. 4, the utility model provides a kind of high pressure winding skeleton, and skeleton 2 is the straight tube shape knot of both ends insertion Structure, the radial direction extension at least from the outer wall 21 of the one end of skeleton 2 along skeleton 2 are formed with the retaining wall 20 of straight tubular construction. Because the retaining wall 20 for extending formation on the outer wall 21 of skeleton 2 at least adds the insulation path of skeleton 2 in radial directions, Jin Eryou Effect increases the insulation path of insulator interface.Wherein, insulator interface refers specifically to skeleton 2 and embedding in the outer wall 21 of the skeleton 2 The interface formed between insulating materials, insulation path refer specifically to the length of insulator interface.
Preferably, extend from the outer wall 21 at the both ends of skeleton 2 respectively along the radial direction of skeleton 2 formed with a retaining wall 20. More preferably, two retaining walls, the 20 mutually symmetrical structure at the both ends of skeleton 2, refers specifically to the length phase of two retaining walls 20 in the axial direction With and height in radial directions it is identical.Using such structure, can not have to be applied to the skeleton 2 with distinguishing direction The installation of transformer, and ensure the length of insulation path.
Wherein, skeleton 2 can be generally selected as PBT（Polybutylene terephthalate, poly terephthalic acid fourth Diol ester）Skeleton 2 made of material, when transformer is subsequently made on the skeleton 2 for be arranged with high pressure winding 3 embedding insulating materials The insulating barrier 4 formed, the insulating materials can generally select epoxy resin.
In one embodiment, the outside 202 of retaining wall 20 and the end face of skeleton 2.Using such structure design, The sectional dimension of skeleton 2 slightly becomes big, can ensure the length of insulation path.
Preferably, axial direction of the end face of one end of skeleton 2 formed with retaining wall 20 along skeleton 2 further extends to be formed The step 24 of promising straight tubular construction, the roof 241 of step 24, should between the outer wall 21 of skeleton 2 and the inwall 22 of skeleton 2 The setting of step 24 causes the height in the outside 202 of retaining wall 20 to also become insulation path.More preferably, the bottom wall 242 of step 24 Flush further to increase insulation path, and further carry out as example as described below with the inwall 22 of skeleton 2.
For example, the operating voltage of high pressure winding 3 may be up to 10kV, under this operational voltage level, using PBT materials Skeleton 2 made of material and be about 10KV/mm using the highest work field strength of the long-term work of insulating barrier 4 made of epoxy resin, bone Frame 2 and the insulation minimum safe thickness of the long-term work of insulating barrier 4 are 1mm.Safety coefficient（Actual insulation thickness and dielectric are most The ratio between small safe thickness）Usually 4, the thickness of skeleton 2（Refer specifically to wall thickness）n=1mm×4=4mm.
Further, need to prevent d positions from stomata occur and influenceing d position correspondences during embedding insulating materials Then d is greater than 2mm and makes it effectively the validity of this section of insulation path, and d is less than and is equal to (1/2) M, and then M minimum value is 4mm, meanwhile, if considering interface problem, M needs the thickness n more than skeleton 2.Wherein, d be step 24 in the axial direction Length（That is length of the end face 243 of step 24 to the outside 202 of retaining wall 20）, M be improvement as shown in Figure 2 before skeleton 2 ' it is exhausted The insulation path at edge interface（The air line distance that high pressure winding 3 ' is arrived between iron core 1 ' i.e. on skeleton 2 '）.
In the utility model embodiment, on the premise of the above situation is met, as shown in figure 4, can suitably shorten skeleton 2 Length in the axial direction itself is simultaneously maintained by extending the length of the retaining wall 20 and step 24 that are formed in the axial direction Skeleton 2 is overall（Including skeleton 2, retaining wall 20 and step 24）Total length is constant in the axial direction.For ease of understanding, in axial direction On direction, high pressure winding 3 can be divided into the air line distance of the side of iron core 1：High pressure winding 3 arrives the interior of retaining wall 20 on skeleton 2 Length L1, the length L5 of the length L3 and step 24 of retaining wall 20 in the axial direction in the axial direction of wall 22（L5=d）, And meet L1+L3+L5=M.Preferably, M=6mm can be selected, L5=d=2mm, L1=1mm, then L3=M-L1-L5=6-1-2=3mm, And select L2=4mm, L2 is the height radially of inner side 201 of retaining wall 20, at the same by step 24 radial direction thickness Minimum safe thickness 1mm is arranged to, then L4=7mm, L4 is the height of the outside 202 of retaining wall 20 radially.Thus insulation circle Insulation path L=L1+L2+L3+L4+L5=1+4+3+7+2=the 17mm in face.It can be seen that insulator interface of the present utility model after improvement Nearly 3 times of insulation path L=17mm equal to insulation path M=6mm of the insulator interface of prior art before improving.
In another specific embodiment, the outside 202 of retaining wall 20 is but uneven with the end face of skeleton 2 close to the end face of skeleton 2 It is flat.Using such structure design, make due to adding the height of retaining wall 20 in inner side 201 and outside 202 in radial directions For a part for insulation path, it can also ensure the length of insulation path.
In the various embodiments described above, ensureing each several part minimum safe thickness of skeleton 2 and occurring without the premise of stomata problem Under, any rational assignment can be carried out.
The utility model also provides a kind of insulation encapsulated transformer, including：Iron core 1；And both ends insertion is in the low of straight barrel type Press winding skeleton 6；Also include：The both ends insertion of any one embodiment is in the high pressure winding skeleton 2 of straight barrel type as described above；Wherein, High pressure winding skeleton 2 and low pressure winding skeleton 6 is end to end on the same line and both center line（That is axis）Alignment row Row, iron core 1 passes through high pressure winding skeleton 2 and low pressure winding skeleton 6, and high pressure winding skeleton 2 is provided with one end abutting of retaining wall 20 In on iron core 1；It is arranged with the high pressure winding skeleton 2 of high pressure winding 3 and is arranged with the low pressure winding skeleton 6 and iron of low pressure winding 5 Embedding insulating materials in gap forms insulating barrier 4 between core 1.Wherein, the insulating materials of the formation insulating barrier 4 can be asphalt mixtures modified by epoxy resin Fat.In addition, iron core 1 is generally coated by insulation crust 7, the insulation crust 7 is usually plastic shell.In the embodiment, When insulation encapsulated transformer overall structure is constant, the insulation path of insulator interface can be effectively increased after embedding.
Insulation encapsulated transformer of the present utility model and its high pressure winding skeleton, have the advantages that：
By radially extending to form retaining wall 20 in the outer wall 21 of skeleton 2, due to retaining wall 20 presence so that in the footpath of skeleton 2 SI semi-insulation path is added on to direction, therefore the exhausted of insulator interface is effectively increased compared to the structure of prior art skeleton 2 Edge path, it improves the complexity and injection molding difficulty without the increase injection mold of skeleton 2, while saves material, is carrying While the insulating properties of high transformer, cost is reduced.
Embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, every profit The equivalent structure or equivalent flow conversion made with the utility model specification and accompanying drawing content, or directly or indirectly it is used in it The technical field of his correlation, is similarly included in scope of patent protection of the present utility model.

Claims (10)

  1. A kind of 1. high pressure winding skeleton, it is characterised in that：
    The skeleton is the straight tubular construction of both ends insertion, at least the radial direction from the outer wall of described skeleton one end along the skeleton Direction extends the retaining wall for being formed with straight tubular construction.
  2. 2. high pressure winding skeleton according to claim 1, it is characterised in that：
    Extend from the outer wall at the skeleton both ends respectively along the radial direction of the skeleton formed with a retaining wall.
  3. 3. high pressure winding skeleton according to claim 2, it is characterised in that：
    Two mutually symmetrical structures of retaining wall at the skeleton both ends.
  4. 4. the high pressure winding skeleton according to any one of claims 1 to 3, it is characterised in that：
    The outside of the retaining wall and the end face of the skeleton.
  5. 5. high pressure winding skeleton according to claim 4, it is characterised in that：
    Further extension is formed with directly axial direction of the end face of described skeleton one end formed with the retaining wall along skeleton The step of tubular construction；The roof of the step is between the outer wall of the skeleton and the inwall of the skeleton.
  6. 6. high pressure winding skeleton according to claim 5, it is characterised in that：
    The wall thickness n of the skeleton is 4mm；Length between the high pressure winding being wound on the skeleton and the inner side of the retaining wall L1 is 1mm, and the height L2 in the radially inside direction of the retaining wall is 4mm, and the length L3 of the retaining wall in the axial direction is 3mm, the height L4 in the direction radially outside of the retaining wall is 7mm, and the length L5 of the step in the axial direction is 2mm.
  7. 7. the high pressure winding skeleton according to any one of claims 1 to 3, it is characterised in that：
    The outside of the retaining wall does not flush close to the end face of the skeleton, but with the end face of the skeleton.
  8. 8. high pressure winding skeleton according to claim 1, it is characterised in that：
    The skeleton is skeleton made of PBT material.
  9. 9. a kind of insulation encapsulated transformer, including：
    Iron core；
    And both ends insertion is in the low pressure winding skeleton of straight barrel type；
    Characterized in that, also include：
    Both ends insertion as described in any one of claim 1~8 is in the high pressure winding skeleton of straight barrel type；
    Wherein, the high pressure winding skeleton and low pressure winding skeleton is end to end on the same line and alignment, institute State iron core and pass through the high pressure winding skeleton and the low pressure winding skeleton, and the high pressure winding skeleton is provided with one end of retaining wall It is connected on the iron core；
    The high pressure winding skeleton for being arranged with high pressure winding and the low pressure winding skeleton that is arranged with low pressure winding with it is described Gap embedding insulating materials between iron core forms insulating barrier.
  10. 10. insulation encapsulated transformer according to claim 9, it is characterised in that：
    The insulating materials for forming the insulating barrier is epoxy resin.
CN201720847980.8U 2017-07-13 2017-07-13 Insulation encapsulated transformer and its high pressure winding skeleton Active CN206947139U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201720847980.8U CN206947139U (en) 2017-07-13 2017-07-13 Insulation encapsulated transformer and its high pressure winding skeleton
PCT/CN2017/094895 WO2019010731A1 (en) 2017-07-13 2017-07-28 Insulated encapsulated transformer and high voltage winding bobbin thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720847980.8U CN206947139U (en) 2017-07-13 2017-07-13 Insulation encapsulated transformer and its high pressure winding skeleton

Publications (1)

Publication Number Publication Date
CN206947139U true CN206947139U (en) 2018-01-30

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CN (1) CN206947139U (en)
WO (1) WO2019010731A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113963919A (en) * 2021-11-22 2022-01-21 无锡晶磊电子有限公司 Three-phase alternating current reactor takes gasket skeleton certainly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678428A (en) * 1971-05-17 1972-07-18 Westinghouse Electric Corp Interwinding shield for power transformers
CN100422614C (en) * 2005-08-17 2008-10-01 浙江三花制冷集团有限公司 Electromagnetism coil in use for electromagnetism valve
CN101196251A (en) * 2006-12-08 2008-06-11 浙江三花制冷集团有限公司 Electromagnetic coil for solenoid valve
KR101240854B1 (en) * 2011-11-11 2013-03-11 삼성전기주식회사 Transformer
CN105405612A (en) * 2015-11-11 2016-03-16 铜陵瑞博电子科技有限公司 Transformer for high-voltage output

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113963919A (en) * 2021-11-22 2022-01-21 无锡晶磊电子有限公司 Three-phase alternating current reactor takes gasket skeleton certainly
CN113963919B (en) * 2021-11-22 2023-06-02 无锡晶磊电子有限公司 Self-provided gasket framework of three-phase alternating current reactor

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Publication number Publication date
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