CN104934197A - Clamping and noise reducing structure for epoxy cast dry-type transformer core - Google Patents
Clamping and noise reducing structure for epoxy cast dry-type transformer core Download PDFInfo
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- CN104934197A CN104934197A CN201510363318.0A CN201510363318A CN104934197A CN 104934197 A CN104934197 A CN 104934197A CN 201510363318 A CN201510363318 A CN 201510363318A CN 104934197 A CN104934197 A CN 104934197A
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Abstract
The invention discloses a clamping and noise reducing structure for an epoxy cast dry-type transformer core. The structure comprises pull belts, pull belt supporting plates and tightening bolts. The pull belt supporting plates are arranged on the upper end face and the lower end face of an upper clamping piece and the upper end face and the lower end face of a lower clamping piece, open grooves are formed in the ends of the tightening bolts, and the two ends of the pull belts are connected in the open grooves. Connecting holes are formed in the pull belt supporting plates, the pull belts are tightly clamped in a yoke part of the core through the tightening bolts arranged in the connecting holes, and pull belt insulators are arranged between the pull belts and the core. The clamping and noise reducing structure is simple and easy to implement, the assembling reliability is sufficiently ensured, the running noise is low, and the production market requirement is met.
Description
Technical field
The invention belongs to transformer manufacture technology, relate to a kind of epoxy cast dry transformer iron core clamping denoising structure.
Background technology
The iron core clamping structure of conventional epoxies dry-type transformer as shown in Figures 1 to 4.Upper clamping piece 11 and lower clamping piece 12 medium position upper and lower end face have notch 13, after iron core 14 lamination completes, penetrate and draw hoop 15, be provided with insulation buckle 18 drawing on hoop, to draw hoop tightens up the iron yoke position that screw rod 17 clamps iron core, then strain folder both ends folder screw rod 16, the iron yoke position of secured core, draw hoop with iron core between be provided with draw hoop insulation 19.All the time, the cross section of iron core is based on circle, and iron core diameter is relatively large, and clamping channel-section steel specification used is also corresponding higher, so only the clamping force of clamping screw is enough abundant, iron yoke draws hoop only to help out in assembling.
In recent years since, along with the raising of design level, the improvement of processing technology, the structure of transformer coil is progressively toward Long Circle transition.Core section is synchronously changed along with loop construction, and oval straight line position lengthens, and iron core diameter reduces thereupon, and channel-section steel model synchronously reduces.Resultant problem is exactly: channel-section steel specification is little, the stiffness of itself is difficult to meet the demands, the required clamping force of iron yoke clamping just not, iron core noise becomes large thereupon, and the operation noise of dry-type transformer is the dry considerable index of operation that becomes, consequent problem has had a strong impact on the quality of product; And the gap smaller of channel-section steel notch, draw the assembly space of hoop limited, the cuff structure that draws originally assembles difficulty.
Summary of the invention
The object of this invention is to provide a kind of epoxy cast dry transformer iron core clamping denoising structure, this is simple for structure, and fully ensure that the reliability of assembling, runs noise little, meets the production market demand.
Object of the present invention is achieved through the following technical solutions:
A kind of epoxy cast dry transformer iron core clamping denoising structure, is characterized in that: this structure comprises drawstring, drawstring support plate and tightening bolt, and described drawstring support plate is arranged on the upper and lower end face of upper clamping piece and lower clamping piece; Be provided with fluting in tightening bolt end, drawstring two ends are connected in fluting; Drawstring support plate is provided with connecting hole, and drawstring is clamped in the iron yoke position of iron core by the tightening bolt be arranged in connecting hole; Drawstring insulation is set between drawstring and iron core.
In the present invention, drawstring support plate is welded on the upper and lower end face of upper clamping piece and lower clamping piece.Drawstring is made up of flat strip shaped corrosion resistant plate, and be provided with fluting in tightening bolt end, corrosion resistant plate is welded in notch.
Connecting hole aperture on high and low pressure side drawstring support plate is different, and a side position large in connecting hole aperture arranges insulating case.
The present invention cancels and formerly draws cuff structure, uses pulling belt structure instead.Cancel original-pack joining and draw hoop slotted eye used, at the upper and lower end face of folder weldering drawstring support plate.The perforate of high and low pressure side drawstring support plate differs.Arm-tie welds tightening bolt by flat strip shaped corrosion resistant plate two ends and forms, and slot in tightening bolt end, corrosion resistant plate is welded in notch, to ensure enough weld strengths.
After core lamination stack completes, in iron yoke M0 center, drawstring is installed.During drawstring assembling, insulating case is placed on the side that the perforate of folder arm-tie is large, the little side of folder arm-tie perforate does not fill, and to ensure folder one point earth, can not produce floating potential, affect transformer partial discharge.Drawstring insulation is placed, to ensure iron core one point earth between drawstring and iron core.Drawstring tighten up reach design fastening force after, tighten up folder both ends folder screw rod, complete assembling.
The advantage of this structure is: drawstring is made up of stainless steel band, can not increase extra stray loss, and drawstring stiffness can be regulated through row by the width and thickness of stainless steel belt.According to transformer capacity changeable drawstring quantity, to ensure that iron yoke has enough clamping forces, fully ensure that the reliability of assembling, run noise little.Drawstring one end is provided with insulating case, both ensure that the ground connection of folder, ensures again to form short-circuited conducting sleeve, effectively ensure that the electric property of iron core.
Accompanying drawing explanation
Fig. 1 is the iron core clamping structure schematic diagram of conventional epoxies dry-type transformer.
Fig. 2 is the iron core clamping position schematic diagram of conventional epoxies dry-type transformer.
Fig. 3 draws cuff structure schematic diagram in the iron core clamping structure of conventional epoxies dry-type transformer.
Fig. 4 tightens up screw-rod structure schematic diagram in the iron core clamping structure of conventional epoxies dry-type transformer.
Fig. 5 is structural representation of the present invention.
Fig. 6 is iron core clamping position schematic diagram in the present invention.
Fig. 7 is the connection diagram of drawstring and tightening bolt in the present invention.
Fig. 8 is the structural representation of insulating case in the present invention.
Embodiment
A kind of epoxy cast dry transformer iron core clamping denoising structure, see Fig. 5 to Fig. 8, this structure comprises drawstring 1, drawstring support plate 2 and tightening bolt 3, and drawstring support plate 2 is welded on the upper and lower end face of upper clamping piece 6 and lower clamping piece 7; Drawstring is made up of flat strip shaped corrosion resistant plate, and be provided with fluting in tightening bolt 3 end, corrosion resistant plate two ends are welded in notch, to ensure enough weld strengths.Drawstring support plate is provided with connecting hole, and drawstring is clamped in the iron yoke position of iron core 8 by the tightening bolt 3 be arranged in connecting hole; Drawstring insulation 4 is set between drawstring and iron core.Connecting hole aperture on high and low pressure side drawstring support plate is different, and a side position large in connecting hole aperture arranges insulating case 5.
After core lamination stack completes, in iron yoke M0 center, drawstring is installed.During drawstring assembling, insulating case is placed on the side that the perforate of folder arm-tie is large, the little side of folder arm-tie perforate does not fill, and to ensure folder one point earth, can not produce floating potential, affect transformer partial discharge.Drawstring insulation is placed, to ensure iron core one point earth between drawstring and iron core.Drawstring tighten up reach design fastening force after, tighten up folder both ends folder screw rod 9, complete assembling.
Use the no-load running noise of the later dry-type transformer of this structure on average to reduce 3-4dB, facts have proved, this structure is highly effective, fully ensure that the reliability of assembling, runs noise little.
Claims (4)
1. an epoxy cast dry transformer iron core clamping denoising structure, is characterized in that: this structure comprises drawstring (1), drawstring support plate (2) and tightening bolt (3), and described drawstring support plate (2) is arranged on the upper and lower end face of upper clamping piece and lower clamping piece; Be provided with fluting in tightening bolt (3) end, drawstring (1) two ends are connected in fluting; Drawstring support plate (2) is provided with connecting hole, and drawstring (1) is clamped in the iron yoke position of iron core by the tightening bolt (3) be arranged in connecting hole; Drawstring is set between drawstring (1) and iron core and insulate (4).
2. epoxy cast dry transformer iron core clamping denoising structure according to claim 1, is characterized in that: drawstring support plate (2) is welded on the upper and lower end face of upper clamping piece and lower clamping piece.
3. epoxy cast dry transformer iron core clamping denoising structure according to claim 1, it is characterized in that: drawstring (1) is made up of flat strip shaped corrosion resistant plate, be provided with fluting in tightening bolt (3) end, corrosion resistant plate is welded in notch.
4. epoxy cast dry transformer iron core clamping denoising structure according to claim 1, is characterized in that: the connecting hole aperture on high and low pressure side drawstring support plate (2) is different, and a side position large in connecting hole aperture arranges insulating case (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363318.0A CN104934197A (en) | 2015-06-26 | 2015-06-26 | Clamping and noise reducing structure for epoxy cast dry-type transformer core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363318.0A CN104934197A (en) | 2015-06-26 | 2015-06-26 | Clamping and noise reducing structure for epoxy cast dry-type transformer core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104934197A true CN104934197A (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510363318.0A Pending CN104934197A (en) | 2015-06-26 | 2015-06-26 | Clamping and noise reducing structure for epoxy cast dry-type transformer core |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920627A (en) * | 2019-04-24 | 2019-06-21 | 四川智翔电器有限公司 | A kind of stacked iron core of the three-phase stereo of three-phase reactor |
| CN114388248A (en) * | 2022-01-26 | 2022-04-22 | 广州市一变电气设备有限公司 | Low-noise dry-type transformer |
| EP4006926A1 (en) * | 2020-11-26 | 2022-06-01 | Siemens Energy Global GmbH & Co. KG | Press frame for a yoke of a transformer core |
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| CN2697806Y (en) * | 2004-03-26 | 2005-05-04 | 特变电工衡阳变压器有限公司 | Puller strap structure for 1500-core of transformer |
| CN2938347Y (en) * | 2006-05-22 | 2007-08-22 | 北海银河高科技产业股份有限公司 | Iron yoke stainless steel pull band clamping device of power transformer |
| CN201478060U (en) * | 2009-08-01 | 2010-05-19 | 三变科技股份有限公司 | Clamping device of transformer yoke |
| CN202018873U (en) * | 2011-03-23 | 2011-10-26 | 上海一电变压器有限公司 | Drawstring support plate device of resin-insulation pouring dry-type transformer |
| CN202084391U (en) * | 2011-04-28 | 2011-12-21 | 浙江临高电气实业有限公司 | Clamping device for transformer yoke |
| JP4987627B2 (en) * | 2007-08-28 | 2012-07-25 | 株式会社東芝 | Transformer core tightening structure |
| CN203721443U (en) * | 2014-03-19 | 2014-07-16 | 中骏电气（泉州）有限公司 | Clamping structure of dry type transformer |
| CN204695935U (en) * | 2015-06-26 | 2015-10-07 | 镇江天力变压器有限公司 | A kind of epoxy cast dry transformer iron core clamping denoising structure |
-
2015
- 2015-06-26 CN CN201510363318.0A patent/CN104934197A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2697806Y (en) * | 2004-03-26 | 2005-05-04 | 特变电工衡阳变压器有限公司 | Puller strap structure for 1500-core of transformer |
| CN2938347Y (en) * | 2006-05-22 | 2007-08-22 | 北海银河高科技产业股份有限公司 | Iron yoke stainless steel pull band clamping device of power transformer |
| JP4987627B2 (en) * | 2007-08-28 | 2012-07-25 | 株式会社東芝 | Transformer core tightening structure |
| CN201478060U (en) * | 2009-08-01 | 2010-05-19 | 三变科技股份有限公司 | Clamping device of transformer yoke |
| CN202018873U (en) * | 2011-03-23 | 2011-10-26 | 上海一电变压器有限公司 | Drawstring support plate device of resin-insulation pouring dry-type transformer |
| CN202084391U (en) * | 2011-04-28 | 2011-12-21 | 浙江临高电气实业有限公司 | Clamping device for transformer yoke |
| CN203721443U (en) * | 2014-03-19 | 2014-07-16 | 中骏电气（泉州）有限公司 | Clamping structure of dry type transformer |
| CN204695935U (en) * | 2015-06-26 | 2015-10-07 | 镇江天力变压器有限公司 | A kind of epoxy cast dry transformer iron core clamping denoising structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920627A (en) * | 2019-04-24 | 2019-06-21 | 四川智翔电器有限公司 | A kind of stacked iron core of the three-phase stereo of three-phase reactor |
| EP4006926A1 (en) * | 2020-11-26 | 2022-06-01 | Siemens Energy Global GmbH & Co. KG | Press frame for a yoke of a transformer core |
| CN114388248A (en) * | 2022-01-26 | 2022-04-22 | 广州市一变电气设备有限公司 | Low-noise dry-type transformer |
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Application publication date: 20150923 |
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| WD01 | Invention patent application deemed withdrawn after publication |