CN110391071B - Transformer core and assembly method thereof - Google Patents
Transformer core and assembly method thereof Download PDFInfo
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- CN110391071B CN110391071B CN201910730927.3A CN201910730927A CN110391071B CN 110391071 B CN110391071 B CN 110391071B CN 201910730927 A CN201910730927 A CN 201910730927A CN 110391071 B CN110391071 B CN 110391071B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 103
- 238000003475 lamination Methods 0.000 claims abstract description 67
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims description 18
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H01F27/245—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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention provides a transformer iron core and an assembly method thereof, wherein the transformer iron core is composed of a plurality of first silicon steel sheets and second silicon steel sheets which are stacked, both ends of the first silicon steel sheets are provided with first sharp angles, and both sides of the first sharp angles are respectively provided with a first bevel edge and a second bevel edge; the two ends of the second silicon steel sheet are provided with second sharp angles, and the two side edges of the second sharp angles are third bevel edges; the first sharp angle and the second sharp angle are both 45 degrees, the length of the first inclined edge is larger than that of the second inclined edge, and the length of the second inclined edge is equal to that of the third inclined edge; a pair of parallel first silicon steel sheets and a pair of parallel second silicon steel sheets are sequentially connected end to form a first lamination, and a first sharp angle is connected with the tip end of a corresponding second sharp angle; the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, and the first lamination and the second lamination are alternately stacked.
Description
Technical Field
The invention relates to the field of transformers, in particular to a transformer core and an assembly method thereof.
Background
The transformer manufacturing industry has been a history of development for over a hundred years, but has not changed much in terms of its basic principles and overall structure. With the invention and continuous improvement of the silicon steel sheet, the performance of the silicon steel sheet is greatly improved. The grain structure of the silicon steel sheet material is improved, and the effect of reducing hysteresis loss is remarkable. Good materials are subject to lamination processes, and the traditional staggered lamination technology has large air gaps at joints, so that magnetic flux is easy to be in a magnetic saturation state, and the no-load loss and iron core noise are greatly influenced. Meanwhile, the iron core formed by stacking has sharp edges at corners, so that the iron core is easy to scratch or knock, and is not beneficial to carrying and mounting.
Disclosure of Invention
The invention aims to provide a transformer iron core and an assembly method thereof, wherein corners of the iron core are beveled, and sharp edges are avoided.
In order to achieve the above object, the present invention proposes a transformer core composed of a plurality of stacked first and second silicon steel sheets, wherein:
the two ends of the first silicon steel sheet are respectively provided with a first sharp angle, the first sharp angles at the two ends are symmetrical with the center of the first silicon steel sheet, the two sides of the first sharp angle are respectively provided with a first bevel edge and a second bevel edge, the first sharp angle is 45 degrees, and the included angles between the first bevel edge and the second bevel edge and the central axis of the first silicon steel sheet are 45 degrees;
the two ends of the second silicon steel sheet are respectively provided with a second sharp angle, the second sharp angles at the two ends are symmetrical with the central axis of the second silicon steel sheet, the two side edges of the second sharp angle are third sharp edges, the second sharp angle is 45 degrees, and the included angle between the third oblique edge and the central axis of the second silicon steel sheet is 45 degrees;
the length of the first bevel edge is a, the length of the second bevel edge is b, and the length of the third bevel edge is c, wherein a is greater than b=c;
the pair of parallel first silicon steel sheets and the pair of parallel second silicon steel sheets are sequentially connected end to form a square frame-shaped first lamination, and the first sharp angle is connected with the tip end of the corresponding second sharp angle; the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are in a horizontal symmetrical shape, and the first lamination and the second lamination are alternately stacked.
Further, in the transformer core, a groove is formed in the center of one side, opposite to the first silicon steel sheet, of the first silicon steel sheet, a third silicon steel sheet is arranged on a symmetrical axis between the second silicon steel sheets, both ends of the third silicon steel sheet are respectively provided with a third sharp angle, the shape of the groove is matched with that of the third sharp angle, and both ends of the third silicon steel sheet are respectively embedded and clamped in the groove opposite to the first silicon steel sheet.
Further, in the transformer core, the shape and the size of the third sharp angle are consistent with those of the second sharp angle.
Further, in the transformer core, the length of the third silicon steel sheet is equal to the length of the second silicon steel sheet, and the groove is in a sharp angle U shape.
Further, in the transformer core, the length of the third silicon steel sheet is smaller than that of the second silicon steel sheet, and the groove is V-shaped.
Further, in the transformer core, a=2b.
The invention also provides an assembling method of the transformer core, which comprises the following steps of:
step S1: setting up a stacking workbench, and placing an upper clamping piece, a lower clamping piece, a pull plate, pull plate insulation and clamping piece insulation;
step S2: stacking iron cores;
step S2.1: performing assembly of the first laminate
Step S2.1.1: sequentially connecting a pair of parallel first silicon steel sheets and a pair of parallel second silicon steel sheets end to form a square frame shape;
step S2.1.2: measuring the flatness of the first laminate by a level gauge, and adjusting if the first laminate is uneven until the first laminate is horizontal;
step S2.1.3: measuring the diagonal of the first laminated iron core window by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.1.4: after the first lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.1.5: repeating the step S2.2 and the step S2.3;
step S2.2: performing assembly of the second laminate
Step S2.2.1: assembling another pair of parallel first silicon steel sheets and another pair of parallel second silicon steel sheets above the first lamination, and sequentially connecting the first silicon steel sheets and the second silicon steel sheets end to form a square frame shape, wherein the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are horizontally symmetrical;
step S2.2.2: measuring the flatness of the second laminated layer by using a level meter, and adjusting if the second laminated layer is uneven until the second laminated layer is horizontal;
step S2.2.3: measuring the diagonal of the second laminated iron core window by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.2.4: after the second lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.3: sequentially repeating the step S2.1 and the step S2.2, and performing staggered stacking of the first lamination and the second lamination until the iron core lamination is completed;
step S3: the upper clamping piece, the lower clamping piece, the pull plate insulation and the clamping piece insulation are arranged, and the footing insulation and the footing are arranged in sequence;
step S4: hanging the iron core away from the stacking workbench, turning over and standing upright, and detecting the tightness;
step S5: and (3) gluing and/or painting the iron core.
Further, in the assembling method of the transformer core, in step S1, a clamping channel steel is provided between the upper clamping piece and the lower clamping piece, three clamps are placed at the center line position of the pulling plate, the clamps are perpendicular to the upper clamping piece and the lower clamping piece, and the upper clamping piece, the lower clamping piece and the clamps are at the same height.
Further, in the method of assembling a transformer core, the pull plate insulation and the outer opening surfaces of the upper and lower clips are flat.
Compared with the prior art, the invention has the beneficial effects that: the first silicon steel sheet and the second silicon steel sheet are used for half-straight and half-oblique joint assembly, the straight joints and the oblique joints are alternately arranged in the iron core lamination, the oblique joints are 45 degrees, and the end angle of the silicon steel sheet is provided with one side with one short side and two oblique edges, so that the corners of the iron core form an oblique section, the structure is reliable, the shearing and stacking are also convenient, and the silicon steel sheet utilization rate is high.
Drawings
Fig. 1 is a schematic structural diagram of a first lamination of a transformer core according to the present invention;
fig. 2 is a schematic structural diagram of a second lamination of a transformer core according to the present invention;
fig. 3 is a schematic structural view of a first lamination of another transformer core according to the present invention;
fig. 4 is a schematic structural diagram of a second lamination of another transformer core according to the present invention.
Wherein: the steel plate comprises a first silicon steel plate 1, a first sharp angle 2, a second silicon steel plate 3, a second sharp angle 4, a third silicon steel plate 5, a third sharp angle 6 and a groove 7.
Detailed Description
The transformer core and the method of assembling the same of the present invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, it being understood that the invention described herein may be modified by those skilled in the art while still achieving the advantageous effects of the invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
As shown in fig. 1 to 4, the present invention proposes a transformer core composed of a plurality of stacked first silicon steel sheets 1 and second silicon steel sheets 3, wherein:
the two ends of the first silicon steel sheet 1 are respectively provided with a first sharp angle 2, the first sharp angles 2 at the two ends are symmetrical with the center of the first silicon steel sheet 1, the two sides of the first sharp angle 2 are respectively provided with a first oblique angle and a second oblique angle, the first sharp angle 2 is 45 degrees, and the included angles between the first oblique angle and the second oblique angle and the central axis of the first silicon steel sheet 1 are respectively 45 degrees;
the two ends of the second silicon steel sheet 3 are respectively provided with a second sharp angle 4, the second sharp angles 4 at the two ends are symmetrical by the central axis of the second silicon steel sheet 3, the two side edges of the second sharp angle 4 are third bevel edges, the second sharp angle 4 is 45 degrees, and the included angle between the third bevel edges and the central axis of the second silicon steel sheet 3 is 45 degrees;
the length of the first bevel edge is a, the length of the second bevel edge is b, and the length of the third bevel edge is c, wherein a > b=c, preferably a=2b=2c;
a pair of parallel first silicon steel sheets 1 and a pair of parallel second silicon steel sheets 3 are sequentially connected end to form a square frame-shaped first lamination, and a first sharp angle 2 is connected with the tip of a corresponding second sharp angle 4; the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are horizontally symmetrical, and the first lamination and the second lamination are alternately stacked.
Meanwhile, a groove 7 is formed in the center of one side, opposite to the first silicon steel sheet 1, of the third silicon steel sheet 5, the third silicon steel sheet 5 is arranged on a symmetrical shaft between the second silicon steel sheets 3 opposite to the first silicon steel sheet, third sharp corners 6 are formed in two ends of the third silicon steel sheet 5, the shape of the groove 7 is matched with that of the third sharp corners 6, two ends of the third silicon steel sheet 5 are respectively clamped in the groove 7 opposite to the first silicon steel sheet 1 in an embedded mode, and the shape and the size of the third sharp corners 6 are consistent with those of the second sharp corners 4, namely, the shapes of the third silicon steel sheet 5 and the second silicon steel sheet 3 are consistent. As shown in fig. 1 to 2, when the length of the third silicon steel sheet 5 is equal to the length of the second silicon steel sheet 3, the groove 7 has a pointed U shape; as shown in fig. 3 to 4, when the length of the third silicon steel sheet 5 is smaller than the length of the second silicon steel sheet 3, the groove 7 has a V shape.
The invention also provides an assembling method of the transformer core, which comprises the following steps of:
step S1: setting up a stacking workbench, and placing an upper clamping piece, a lower clamping piece, a pull plate, pull plate insulation and clamping piece insulation; and a clamping channel steel is arranged between the upper clamping piece and the lower clamping piece, three clamps are placed at the central line position of the pulling plate, the clamps are perpendicular to the upper clamping piece and the lower clamping piece, and the upper clamping piece, the lower clamping piece and the clamps are at the same height. The outer opening surfaces of the pull plate insulation and upper clamping piece and the lower clamping piece are flat;
step S2: stacking iron cores;
step S2.1: splicing of first laminate
Step S2.1.1: a pair of parallel first silicon steel sheets 1 and a pair of parallel second silicon steel sheets 3 are connected end to end in sequence to form a square frame shape;
step S2.1.2: measuring the flatness of the first laminated layer by using a level meter, and adjusting if the first laminated layer is uneven until the first laminated layer is horizontal;
step S2.1.3: measuring the diagonal of the first laminated iron core window by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.1.4: after the first lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.1.5: repeating the step S2.2 and the step S2.3;
step S2.2: splicing the second laminate
Step S2.2.1: assembling another pair of parallel first silicon steel sheets 1 and another pair of parallel second silicon steel sheets 3 above the first lamination, and sequentially connecting the first silicon steel sheets and the second silicon steel sheets end to form a square frame shape, wherein the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are horizontally symmetrical;
step S2.2.2: measuring the flatness of the second lamination by using a level meter, and adjusting if the second lamination is uneven until the second lamination is horizontal;
step S2.2.3: measuring the diagonal of the window of the second laminated iron core by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.2.4: after the second lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.3: sequentially repeating the step S2.1 and the step S2.2, and performing staggered stacking of the first lamination and the second lamination until the iron core lamination is completed;
step S3: mounting an upper clamping piece, a lower clamping piece, a pull plate, pull plate insulation and clamping piece insulation, and sequentially mounting a footing insulation and a footing;
step S4: clamping the iron core by using a clamp, putting proper channel steel into the clamp to clamp and clamp the straight core column so as to prevent the iron core column from bending in perpendicularity, hanging the iron core away from the stacking workbench by matching with the clamp, turning over and standing, and detecting the tightness;
step S5: gluing and/or painting the iron core;
step S6: and dismantling the vertical channel steel at two sides, and then clamping and clamping the channel steel.
In summary, in the transformer core and the assembly method thereof provided in this embodiment, the first silicon steel sheet and the second silicon steel sheet are assembled by half straight and half oblique seams, the straight seams and the oblique seams are alternately formed in the core lamination, the oblique seams are 45 degrees, and the end angles of the silicon steel sheets are provided with one side with one short two oblique cutting edges, so that the corners of the core form the oblique cutting surfaces, the structure is reliable, the shearing and stacking are also convenient, and the silicon steel sheet utilization rate is high.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the invention without departing from the scope of the technical solution of the invention, and the technical solution of the invention is not departing from the scope of the invention.
Claims (7)
1. The transformer core is characterized by comprising a plurality of first silicon steel sheets and second silicon steel sheets which are stacked, wherein:
the two ends of the first silicon steel sheet are respectively provided with a first sharp angle, the first sharp angles at the two ends are symmetrical with the center of the first silicon steel sheet, the two sides of the first sharp angle are respectively provided with a first bevel edge and a second bevel edge, the first sharp angle is 45 degrees, and the included angles between the first bevel edge and the second bevel edge and the central axis of the first silicon steel sheet are 45 degrees;
the two ends of the second silicon steel sheet are respectively provided with a second sharp angle, the second sharp angles at the two ends are symmetrical with the central axis of the second silicon steel sheet, the two side edges of the second sharp angle are third sharp edges, the second sharp angle is 45 degrees, and the included angle between the third oblique edge and the central axis of the second silicon steel sheet is 45 degrees;
the length of the first bevel edge is a, the length of the second bevel edge is b, and the length of the third bevel edge is c, wherein a is greater than b=c, and a=2b;
the pair of parallel first silicon steel sheets and the pair of parallel second silicon steel sheets are sequentially connected end to form a square frame-shaped first lamination, and the first sharp angle is connected with the tip end of the corresponding second sharp angle; the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are horizontally symmetrical, and the first lamination and the second lamination are alternately stacked;
the center of one side opposite to the first silicon steel sheet is provided with a groove, a third silicon steel sheet is arranged on a symmetrical shaft between the second silicon steel sheets opposite to the first silicon steel sheet, both ends of the third silicon steel sheet are provided with third sharp corners, the shape of the groove is matched with that of the third sharp corners, and both ends of the third silicon steel sheet are respectively embedded and clamped in the groove opposite to the first silicon steel sheet.
2. The transformer core according to claim 1, wherein the third sharp corner and the second sharp corner are both shaped and sized in conformity.
3. The transformer core according to claim 2, wherein the length of the third silicon steel sheet is equal to the length of the second silicon steel sheet, and the groove has a pointed U shape.
4. The transformer core according to claim 2, wherein the length of the third silicon steel sheet is smaller than the length of the second silicon steel sheet, and the groove is V-shaped.
5. A method of assembling a transformer core as set forth in claim 1, comprising the steps of:
step S1: setting up a stacking workbench, and placing an upper clamping piece, a lower clamping piece, a pull plate, pull plate insulation and clamping piece insulation;
step S2: stacking iron cores;
step S2.1: performing assembly of the first laminate;
step S2.1.1: sequentially connecting a pair of parallel first silicon steel sheets and a pair of parallel second silicon steel sheets end to form a square frame shape;
step S2.1.2: measuring the flatness of the first laminate by a level gauge, and adjusting if the first laminate is uneven until the first laminate is horizontal;
step S2.1.3: measuring the diagonal of the first laminated iron core window by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.1.4: after the first lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.1.5: repeating the step S2.2 and the step S2.3;
step S2.2: performing assembly of the second laminate;
step S2.2.1: assembling another pair of parallel first silicon steel sheets and another pair of parallel second silicon steel sheets above the first lamination, and sequentially connecting the first silicon steel sheets and the second silicon steel sheets end to form a square frame shape, wherein the assembling direction of the second lamination is opposite to the assembling direction of the first lamination, namely the first lamination and the second lamination are horizontally symmetrical;
step S2.2.2: measuring the flatness of the second laminated layer by using a level meter, and adjusting if the second laminated layer is uneven until the second laminated layer is horizontal;
step S2.2.3: measuring the diagonal of the second laminated iron core window by using a tape measure, wherein the length of the diagonal is completely consistent, and if the diagonal is inconsistent, the diagonal must be immediately adjusted until the length is consistent;
step S2.2.4: after the second lamination is assembled, the knocking plate is padded at the outer side edge, and a hammer is used for knocking the knocking plate, so that the outer side edge is kept neat;
step S2.3: sequentially repeating the step S2.1 and the step S2.2, and performing staggered stacking of the first lamination and the second lamination until the iron core lamination is completed;
step S3: the upper clamping piece, the lower clamping piece, the pull plate insulation and the clamping piece insulation are arranged, and the footing insulation and the footing are arranged in sequence;
step S4: hanging the iron core away from the stacking workbench, turning over and standing upright, and detecting the tightness;
step S5: and (3) gluing and/or painting the iron core.
6. The method of assembling a transformer core according to claim 5, wherein in step S1, a clamping channel is provided between the upper clamping member and the lower clamping member, three clamps are disposed at the center line of the pulling plate, the clamps are perpendicular to the upper clamping member and the lower clamping member, and the upper clamping member, the lower clamping member, and the clamps are at the same height.
7. The method of assembling a transformer core according to claim 5, wherein the pull plate insulation and the upper clip member are flat with the outer opening surface of the lower clip member.
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| CN201910730927.3A CN110391071B (en) | 2019-08-08 | 2019-08-08 | Transformer core and assembly method thereof |
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