CN107180695B - Three-column amorphous iron core with pull plate and manufacturing method thereof - Google Patents
Three-column amorphous iron core with pull plate and manufacturing method thereof Download PDFInfo
- Publication number
- CN107180695B CN107180695B CN201710576786.5A CN201710576786A CN107180695B CN 107180695 B CN107180695 B CN 107180695B CN 201710576786 A CN201710576786 A CN 201710576786A CN 107180695 B CN107180695 B CN 107180695B
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- iron core
- amorphous
- amorphous iron
- plate
- core body
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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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- 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
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
Abstract
The invention discloses a three-column amorphous iron core with a pull plate, which comprises an amorphous iron core body and the pull plate, wherein the amorphous iron core body comprises an outer frame iron core and two inner frame iron cores which are of an integrated structure, and further comprises a grid cloth plate and a composite membrane plate which are arranged between the amorphous iron core body and the pull plate, the grid cloth plate and the composite membrane plate both avoid a lap joint of the amorphous iron core body, and the amorphous iron core body, the grid cloth plate, the composite membrane plate and the pull plate are solidified into a whole through epoxy resin. The invention also discloses a manufacturing method of the three-column amorphous iron core with the pull plate. According to the three-column amorphous iron core with the pull plate, the outer frame iron core and the inner frame iron core are integrally formed before annealing, so that the amount of fragments in the subsequent assembly process is reduced, the no-load loss and noise of a transformer are further effectively reduced, and the insulation resistance value of the transformer can be effectively increased and the stability of the transformer can be ensured by adding the grid cloth plate and the composite membrane plate.
Description
Technical Field
The invention relates to the technical field of manufacturing of amorphous alloy dry-type transformer iron cores, in particular to a three-column amorphous iron core with a pull plate and a manufacturing method thereof.
Background
The amorphous alloy distribution transformer is energy-saving distribution equipment adopting new materials, new structures and new processes, and the iron core material is amorphous alloy, and has outstanding low no-load loss characteristics compared with the traditional silicon steel iron core. The existing three-column amorphous alloy dry-type transformer iron core consists of an outer frame iron core and two identical inner frame iron cores, wherein the two inner frame iron cores are arranged in the outer frame iron core side by side, the outer frame iron cores and the two inner frame iron cores are made of a plurality of layers of amorphous alloy strips in a lap joint mode, and lap joint parts of the outer frame iron cores and the two inner frame iron cores face to the same side.
At present, the three-column type amorphous alloy dry-type transformer iron core is manufactured by separately manufacturing an outer frame iron core and an inner frame iron core, separately exciting and annealing, sleeving the inner frame iron core into the outer frame iron core after annealing, and because the annealed amorphous alloy material is very brittle, the outer frame iron core and the inner frame iron core are easily damaged in the assembly process, a lot of fragments can be generated, so that the transformer has large no-load loss and large noise.
In addition, the amorphous alloy iron core of the small dry-type distribution transformer with the 10kV level and the capacity of 200kVA or less is of a two-frame three-column structure: namely, two inner frame iron cores and one outer frame iron core are adopted; when the capacity is more than or equal to 250kVA, the cross section area of a single iron core is insufficient to meet the magnetic density requirement because the cross section area is limited by 213mm of the width maximum width of the amorphous alloy strip, and the adoption of the amorphous alloy strip is needed: the four inner frame iron cores and the two outer frame iron cores are adhered together by using epoxy resin. Because the iron core and the pull plate, and the upper iron core and the lower iron core are bonded by epoxy resin, the insulation resistance is not high, the burst short circuit resistance is not strong, and the operation stability of the transformer can be reduced.
In view of this, the prior art is still to be improved.
Disclosure of Invention
The invention aims to provide a three-column amorphous iron core with a pull plate, which effectively reduces the loss and noise of the three-column amorphous alloy dry-type transformer iron core and effectively increases the insulation resistance value between two layers of iron cores and between the iron core and the pull plate and ensures the stability of the three-column amorphous alloy dry-type transformer iron core through a novel manufacturing method.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a take three post amorphous iron core of arm-tie, includes amorphous iron core body and arm-tie, amorphous iron core body includes frame iron core and two inside casing iron cores, and two inside casing iron cores set up side by side in the frame iron core, the arm-tie sets up respectively on the upper and lower cross-section plane of amorphous iron core body, and it includes horizontal bottom plate and three riser, three riser interval are perpendicular, coplanar connection on horizontal bottom plate, frame iron core and inside casing iron core be integrated into one piece structure, by the overlap joint of many stacks of amorphous alloy strip form, be annular rectangle, and the overlap joint orientation is with one side, still include net cloth board and the compound lamina membranacea that sets up between amorphous iron core body and arm-tie, net cloth board and compound lamina membranacea all avoid the overlap joint of amorphous iron core body, net cloth board, compound lamina membranacea and arm-tie pass through epoxy solidification as an organic whole.
Further, the amorphous iron core bodies are stacked between the two pull plates in sequence, and a grid cloth plate is arranged between the amorphous iron core bodies and is solidified through epoxy resin.
Another object of the present invention is to provide a method for manufacturing a three-column amorphous iron core with a pull plate, which effectively reduces the loss and noise of the three-column amorphous alloy dry-type transformer iron core, and effectively increases the insulation resistance between two layers of iron cores and between the iron core and the pull plate and ensures the stability thereof, the method comprising the steps of:
step 1, forming two identical inner frame iron cores in a lap joint mode by using an amorphous alloy strip material around an inner template, fixing the two inner frame iron cores side by side, forming an outer frame iron core in a lap joint mode by using the amorphous alloy strip material directly around the two inner frame iron cores, and finishing the manufacture of an amorphous iron core body by the lap joint of the outer frame iron core and the inner frame iron core facing to the same side;
step 2, binding the amorphous iron core body by using an outer template and a steel belt, putting the amorphous iron core body into an amorphous iron core special annealing furnace, enabling the centers of the two inner frame iron cores to pass through a copper bar and adding longitudinal magnetic current, and annealing by using a special annealing process;
and 3, taking down an inner template, an outer template and a steel belt on the amorphous iron core body, respectively paving a grid cloth plate and a composite membrane plate which are coated with epoxy resin on the upper section plane and the lower section plane of the amorphous iron core body in sequence, wherein the grid cloth plate and the composite membrane plate are required to avoid the lap joint of the amorphous iron core body, respectively paving two pull plates on the upper composite membrane plate and the lower composite membrane plate, and completing the manufacture of the three-column amorphous iron core with the pull plates after the epoxy resin is solidified.
Further, two amorphous iron core bodies are arranged, a grid cloth plate coated with epoxy resin and a composite membrane plate are sequentially paved on one section plane of the amorphous iron core bodies, the pulling plates are paved on the composite membrane plate, after the epoxy resin is solidified, the two amorphous iron core bodies with pulling plates at one side are stacked, the grid cloth plate coated with the epoxy resin is placed between the two amorphous iron core bodies, the grid cloth plate needs to avoid the lap joint of the amorphous iron core bodies, and after the epoxy resin is solidified, the manufacturing of the three-column amorphous iron core with the pulling plates is completed.
Further, the annealing process in the step 2 is as follows: the exciting current is 1600-1700A, the annealing temperature is 335-358 ℃, and the annealing time is 135-160 minutes.
Further, the epoxy resin is cured by natural drying for 5 hours or by baking at 100 ° for 1 hour.
Compared with the prior art, the invention has the beneficial effects that:
1. because the outer frame iron core and the inner frame iron core are integrally formed before annealing, the outer frame iron core and the inner frame iron core are prevented from being damaged due to large operation actions in the sleeving process, and the amorphous alloy sheets of the outer frame iron core and the inner frame iron core, which are positioned on the overlapping ports, are greatly reduced in the amount of fragments of the amorphous iron core body, and then no-load loss and noise of the transformer are effectively reduced.
2. Because the outer frame iron core is directly formed by lap joint around the two inner frame iron cores, the inner film plate required by independently manufacturing the outer frame iron core is omitted, and the manufacturing method of the sizing shirt and the tightly attached inner frame iron core can effectively save the usage amount of amorphous alloy strips and reduce the material cost.
3. The amorphous iron core body and the pulling plate are placed with the grid cloth plate and the composite film plate, and the epoxy resin is used for curing, so that the insulation resistance value between the amorphous iron core body and the pulling plate can be effectively increased, and the stability of the amorphous iron core body and the pulling plate can be ensured.
Drawings
Fig. 1 is a schematic structural view of an amorphous core body according to the present invention;
FIG. 2 is a schematic view of the structure of the pulling plate of the present invention;
fig. 3 is a schematic diagram of the front structure of the three-column amorphous iron core with pull plate of the present invention;
fig. 4 is a schematic side view of a three-pole amorphous iron core with a pulling plate according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a partial enlarged view at B in FIG. 4;
reference numerals illustrate: 1-an amorphous core body; 2-an outer frame iron core; 3-an inner frame core; 4-pulling plates; 5-a transverse bottom plate; 6-risers; 7-grid cloth plate; 8-a composite membrane plate; 9-pouring holes; 10-pull-in holes and 11-lap joints.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
Examples:
as shown in fig. 1 to 5, a three-leg amorphous core with a pull plate includes an amorphous core body 1, a pull plate 2, a mesh cloth plate 7, and a composite mold plate 8. The amorphous iron core body 1 comprises an outer frame iron core 2 and two inner frame iron cores 3, the two inner frame iron cores 3 are arranged in the outer frame iron core 1 side by side, the outer frame iron core 2 and the inner frame iron cores 3 are of an integrated structure, each of the outer frame iron cores 2 and the inner frame iron cores 3 is formed by overlapping a plurality of stacks of amorphous alloy strips and is in an annular rectangle, and the lap joint 11 faces the same side, in the embodiment, the amorphous iron core body 1 is two, and the two layers are stacked up and down. The pull plate 2 is respectively positioned on the bottom surface of the lower amorphous iron core body 1 and the top surface of the upper amorphous iron core body 1, and comprises a transverse bottom plate 5 and three vertical plates 6, wherein the three vertical plates 6 are vertically spaced and connected on the transverse bottom plate 5 in the same plane, the pull plate 1 is also provided with a pouring hole 9 and a pull connection hole 10, the pull connection hole 10 can be used for installing a positioning pin, and the functions and the specific structures of the pull plate are not repeated here. Be provided with net cloth board 7 between upper and lower two-layer amorphous iron core body 1, all be provided with net cloth board 7 and compound lamina membranacea 8 between amorphous iron core body 1 and arm-tie 2, and net cloth board 7 and amorphous iron core body 1 laminating, compound lamina membranacea 8 and arm-tie 2 laminating, and net cloth board 7 and compound lamina membranacea 8 all need avoid the overlap joint 11 of amorphous iron core body 1, net cloth board 7, compound lamina membranacea 8 and arm-tie 2 pass through epoxy solidification as an organic wholely.
Wherein, the grid cloth plate 7 is made of glass fiber and epoxy resin, the thickness is 0.6mm, the composite template 8 is made of polyester film and glue, the thickness is 1.1mm, the color is white, and the color of the epoxy resin is gray.
The three-column amorphous iron core with the pull plate provided by the embodiment is specifically manufactured through the following steps:
step 1, forming two identical inner frame iron cores in a lap joint mode by using an amorphous alloy strip material around an inner template, fixing the two inner frame iron cores side by side, forming an outer frame iron core in a lap joint mode by using the amorphous alloy strip material directly around the two inner frame iron cores, and finishing the manufacture of an amorphous iron core body by the lap joint of the outer frame iron core and the inner frame iron core facing to the same side;
step 2, binding the amorphous iron core body by using an outer template and a steel belt, putting the amorphous iron core body into an amorphous iron core special annealing furnace, enabling the centers of the two inner frame iron cores to pass through a copper bar and add longitudinal magnetic current, and carrying out annealing treatment by using a special annealing process, wherein the annealing process is as follows: the exciting current is 1600-1700A, the annealing temperature is 335-358 ℃, and the annealing time is 135-160 minutes;
step 3, taking down an inner template, an outer template and a steel belt on the amorphous iron core body, and sequentially paving a grid cloth plate and a composite membrane plate which are coated with epoxy resin on one section plane of the amorphous iron core body, wherein the grid cloth plate and the composite membrane plate are required to avoid an overlap joint of the amorphous iron core body, paving a pull plate on the composite membrane plate, and standing for 5 hours or baking for 1 hour through 100 DEG to completely solidify the epoxy resin;
and 4, stacking the two solidified amorphous iron core bodies with the pull plates at one side, and placing a grid cloth plate coated with epoxy resin between the two amorphous iron core bodies, wherein the grid cloth plate needs to avoid the lap joint of the amorphous iron core bodies, and placing for 5 hours or baking for 1 hour through 100 degrees to completely solidify the epoxy resin, so that the manufacturing of the three-column amorphous iron core with the pull plates is completed.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a take three post amorphous iron core of arm-tie, includes amorphous iron core body and arm-tie, amorphous iron core body includes frame iron core and two inside casing iron cores, and two inside casing iron cores set up side by side in the frame iron core, the arm-tie sets up respectively on the upper and lower section plane of amorphous iron core body, and it includes horizontal bottom plate and three riser, and three riser interval are perpendicular, with the planar connection on horizontal bottom plate, its characterized in that: the outer frame iron core and the inner frame iron core are of an integrated structure, are formed by overlapping a plurality of stacks of amorphous alloy strips and are in an annular rectangle, the lap joint faces the same side, the outer frame iron core and the inner frame iron core are further provided with grid cloth plates and composite membrane plates which are arranged between the amorphous iron core body and the pull plates, the grid cloth plates and the composite membrane plates avoid the lap joint of the amorphous iron core body, and the amorphous iron core body, the grid cloth plates, the composite membrane plates and the pull plates are solidified into a whole through epoxy resin;
the amorphous iron core comprises two amorphous iron core bodies, wherein the amorphous iron core bodies are sequentially stacked between two pull plates, and a grid cloth plate is arranged between the amorphous iron core bodies and is solidified through epoxy resin;
the grid cloth plate is made of glass fiber and epoxy resin, and the composite template is made of polyester film and glue.
2. The manufacturing method of the three-column amorphous iron core with the pull plate is characterized by comprising the following steps of:
step 1, forming two identical inner frame iron cores by overlapping an amorphous alloy strip around an inner template, fixing the two inner frame iron cores side by side, forming an outer frame iron core by overlapping the amorphous alloy strip directly around the two inner frame iron cores, and finishing the manufacture of an amorphous iron core body by the overlapping joint of the outer frame iron core and the inner frame iron core facing the same side;
step 2, binding the amorphous iron core body by using an outer template and a steel belt, putting the amorphous iron core body into an amorphous iron core special annealing furnace, enabling the centers of the two inner frame iron cores to pass through a copper bar, adding exciting current, and annealing by using a special annealing process;
step 3, taking down an inner template, an outer template and steel strips on the amorphous iron core bodies, wherein the number of the amorphous iron core bodies is two, a grid cloth plate and a composite membrane plate which are coated with epoxy resin are sequentially paved on one section plane of each amorphous iron core body, wherein the grid cloth plate and the composite membrane plate are required to avoid the lap joint of the amorphous iron core bodies, the pulling plate is paved on the composite membrane plate, after the epoxy resin is solidified, the two amorphous iron core bodies with pulling plates at one side are stacked, the grid cloth plate coated with the epoxy resin is placed between the two amorphous iron core bodies, the lap joint of the amorphous iron core bodies is required to be avoided, and after the epoxy resin is solidified, the manufacture of the three-column amorphous iron core with the pulling plate is completed.
3. The method for manufacturing a three-column amorphous iron core with a pull plate according to claim 2, wherein the annealing process in step 2 is as follows: the exciting current is 1600-1700A, the annealing temperature is 335-358 ℃, and the annealing time is 135-160 minutes.
4. A method of manufacturing a three-leg amorphous iron core with a pull plate according to claim 3, wherein the epoxy resin is cured by natural drying for 5 hours or by baking for 1 hour at 100 ℃.
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| CN201710576786.5A CN107180695B (en) | 2017-07-14 | 2017-07-14 | Three-column amorphous iron core with pull plate and manufacturing method thereof |
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| CN201710576786.5A CN107180695B (en) | 2017-07-14 | 2017-07-14 | Three-column amorphous iron core with pull plate and manufacturing method thereof |
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| CN107180695A CN107180695A (en) | 2017-09-19 |
| CN107180695B true CN107180695B (en) | 2023-10-20 |
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| CN108172391B (en) * | 2017-09-21 | 2020-03-13 | 佛山市中研非晶科技股份有限公司 | Assembling method of three-column amorphous alloy dry-type transformer with pulling plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845641U (en) * | 2010-08-31 | 2011-05-25 | 西安非晶中西变压器有限公司 | Iron core structure of three-phase and three-column type amorphous transformer |
| CN203218076U (en) * | 2013-04-19 | 2013-09-25 | 上海日港置信非晶体金属有限公司 | Three-phase and three-column type amorphous alloy dry-type transformer and iron cores thereof |
| CN105097234A (en) * | 2015-08-13 | 2015-11-25 | 王永法 | Anti-short-circuit amorphous-alloy oil-immersed transformer and preparation method thereof |
| CN106158281A (en) * | 2015-04-16 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of three post drawplate type dry-type amorphous alloy transformers |
| CN207038306U (en) * | 2017-07-14 | 2018-02-23 | 佛山市中研非晶科技股份有限公司 | A kind of three post amorphous cores with arm-tie |
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- 2017-07-14 CN CN201710576786.5A patent/CN107180695B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845641U (en) * | 2010-08-31 | 2011-05-25 | 西安非晶中西变压器有限公司 | Iron core structure of three-phase and three-column type amorphous transformer |
| CN203218076U (en) * | 2013-04-19 | 2013-09-25 | 上海日港置信非晶体金属有限公司 | Three-phase and three-column type amorphous alloy dry-type transformer and iron cores thereof |
| CN106158281A (en) * | 2015-04-16 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of three post drawplate type dry-type amorphous alloy transformers |
| CN105097234A (en) * | 2015-08-13 | 2015-11-25 | 王永法 | Anti-short-circuit amorphous-alloy oil-immersed transformer and preparation method thereof |
| CN207038306U (en) * | 2017-07-14 | 2018-02-23 | 佛山市中研非晶科技股份有限公司 | A kind of three post amorphous cores with arm-tie |
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