CN101276677A

CN101276677A - Oil-immersed type power transformer for hatch winding iron core

Info

Publication number: CN101276677A
Application number: CNA2007100107352A
Authority: CN
Inventors: 齐会南; 李毅强; 苟东宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-27
Filing date: 2007-03-27
Publication date: 2008-10-01

Abstract

An open rolled iron core oil-immersed type power transformer, is characterized in that an iron core frame is manufactured by winding silicon steel strip materials via circular, elliptical, tridimensional trigonal open iron core winders which are provided in the invention with the application number of 20060029267.9; a two-square-shaped rectangular frame is constructed by abreast arranging two open rolled iron cores with square shapes and indent semiellipse sections, and the two-square-shaped rectangular frame is packaged in an open rolled iron core rectangular frame with a convex semiellipse section, all of the sections of three columns of the iron core are formed by butt connecting two indent hemicycles and a convex hemicycle, the sections of three columns of the iron core after assembling are ellipse, step-shape or polygon cylinders. Because of the open characteristic of the iron core, the coil can be winded singly, and the coil can be mounted or replaced by opening the iron core at a U-shaped position of an open slot during production and maintaining, so that the transformer is suitable for the capability of 30KVA to 3150KVA and mass production.

Description

Oil-immersed type power transformer for hatch winding iron core

Affiliated technical field

The present invention relates to that capacity is the voltage changer of 30KVA～3150KVA in a kind of high performance power transformer, particularly distribution system.

Background technology

Oil-immersed power transformer comprises three big parts iron cores, coil and fuel tank, the iron core of the oil-filled transformer in the electric power system has stacked, volume iron core formula two classes, the lamination iron core, promptly form by the silicon steel sheet stack, because of all there is many places mitre in the iron core of stack moulding at every layer edge joint place, cause the increase of magnetic resistance and iron loss, exist the exciting current of transformer to increase thereupon, reduce power factor, have a strong impact on defectives such as grid supply quality, up to the source of 45-70 decibel noise, the iron core utilization rate of raw materials was not high yet when this iron core seam still caused the voltage changer operation.Volume iron core formula is applied to the voltage conversion device of electric power system, such as high performance no seam reel iron core transformer, though it is superior more a lot of than laminated transformer on performance, but because the volume iron core does not have seam, also exist such as: the production capacity of manufacturing equipment is limited, safeguard very difficulty of aspect, manufacturing process is quite loaded down with trivial details, exists simultaneously to have limited to satisfy the defectives such as condition of producing power transformer on the production technology.The promotion and application of volume iron core on voltage conversion device have been restricted.

Summary of the invention

Type of the present invention provides a kind of hatch coiled iron core oil-immersed type transformer, has thoroughly solved defective and deficiency on low, the no seam coiled iron core oil-immersed type of the laminated core structure oil-immersed power transformer performance power transformer manufacturing process.The hatch coiled iron core oil-immersed type transformer iron core is to adopt the applicant to provide circle, oval, three-dimensional triangular form open core up-coiler to reel and form at application number in for 200610029267.9; In rolling the iron core process, straight line or the curve billot of being left by silicon strip slitting line and silicon strip broken line cutting machine successively rolling silicon strip after disconnecting continuously through the coiling iron core machine earlier; Wherein a fracture is all arranged in every layer, arrange by regular linear under the automatic control system of coiling iron core machine the position of fracture, sets the position of fracture usually as required, and the position can be located at side column, go up yoke or yoke down.

The cross sectional shape of three stem stems in the open type volume iron core of the present invention is circle, step (external circle), polygon (external circle), the cross sectional shape of corresponding high and low pressure coil cover is circular, the volume iron core has open nature, and whole transformer does not need special-purpose volume iron-core coil spooling equipment in producing and keeping in repair.The capacity of the oil-immersed power transformer of type of the present invention: the capacity of threephase oil immersed transformer can be at 30KVA～3150KVA.

The technical solution used in the present invention: open core is to adopt the applicant to provide circular at application number in for 200610029267.9, the three-dimensional triangular form open core of ellipse up-coiler rolls and forms, be wound into circle earlier after hydraulic press is pressed into profile is the semicircular iron core of indent for " mouth " font and cross section, with two is the rectangle framework of " mouth " font open coil iron core horizontal stroke of formation placed side by side " mouth " font, indent semicircle rectangle framework with horizontal " mouth " font is interior core, again with up-coiler in its framework outside with straight line or curve silicon strip be wound into the cross section be the open coil iron core framework of semicircle big " mouth " font of evagination closely coiling is solid, finish the process that rolls of horizontal stroke " day " type three post three-phase transformer iron cores.The method that whole coiling iron core adopted is the silicon strip billot to be carried out continuous reeling rapidly form after cutting off, three stem stem cross sections of iron core be by the indent of two circles or step (external semicircle) or polygon (external semicircle) semicircle and one to dock and become the cross section with the identical shaped evagination semicircle of indent semicircle be round cylinder.The iron core opening part successively can be opened respectively after adopting said structure to roll up the annealed PROCESS FOR TREATMENT of three-phase three stem stem open coil iron cores of fabrication of iron core, be ' U ' type structure, the folded good epoxy resin of coiling that inserts after the iron core taking-up of opening back ' U ' type is done change or the non-needed primary of dried change, the secondary coil sealed, carry out PROCESS FOR TREATMENT such as suit, dipping lacquer, oven dry then, the iron core device body that assembles coil is put into fuel tank add upper cover and draw four groups of fin of terminals and be distributed on four sides, produce hatch coiled iron core oil-immersed type transformer.

Effect of the present invention.The cross section is that step, polygon, circular open coiled iron core oil-immersed type power transformer have that magnetic circuit is short, performance good, power factor is high, save the material material, characteristics such as little, the anti-sudden short circuit ability of volume is strong, good manufacturability.Do not need the spooling equipment of special-purpose volume iron core special use in production technology, coil coiling has separately improved production efficiency.During the transformer user used, in a single day transformer coil broke down, and the transformer core opening part can be opened back taking-up coil and keep in repair and change, and had thoroughly solved the problems that the volume iron core produces owing to no seam.

Description of drawings

Be further specifying below to drawings and Examples.

Fig. 1 is the iron core view of type of the present invention; Fig. 2 is that core post of the present invention is circular stem stem cross sectional view; Fig. 3 is that core post of the present invention is the stem stem cross sectional view of step (external circle); Fig. 4 is that core post of the present invention is the stem stem cross sectional view of polygon (external circle); Fig. 5 fracture site is at the view of the iron core of last yoke; Fig. 6 fracture site is at the view of the iron core of following yoke; Fig. 7 fracture site is at the view of the iron core of side column; The outside drawing of Fig. 8 type of the present invention; The view of every layer of silicon steel sheet of the single-phase iron core of Fig. 9.

The scope of the size range of the iron core of corresponding different capabilities: H is that 400mm is to 2000mm among Fig. 1; The scope of H1 is that 350mm is to 1800mm; The scope of Hw is that 300mm is to 1500mm; The scope of L1 is that 125mm is to 450mm; The scope of L is that 400mm is to 950mm; The scope of Mo is that 170mm is to 750mm; The yoke wide region is that 100mm is to 350mm.

Corresponding different capabilities transformer core column section circular diameter scope is that 60mm is to 500mm among Fig. 2.

The number of steps of Fig. 3 SMIS column section is referred to as the progression (representing with n) of iron core, and the scope of corresponding different capabilities transformer n is 5～19, the diameter range of cross section circumscribed circle be 60mm to 500mm, the n=11 among the figure.

The scope of the polygon number of corresponding different capabilities transformer core column section is 8～50 among Fig. 4, and the diameter range of cross section circumscribed circle is that 60mm is to 500mm.

The transformer apparent size scope of corresponding different capabilities among Fig. 8: the scope of h is that 700mm is to 2800mm; The scope of h1 is that 200mm is to 1200mm; The scope of b1 is that 500mm is to 2500mm; The scope of b2 is that 400mm is to 1800mm.

Execution mode

Transformer core of the present invention is the rectangle framework of the semicircular open coil iron core of indent (1), (2) horizontal strokes of formation placed side by side ' day ' font by two face shapings for the hollow cross section, and another cross section is that the semicircular open coil iron core rectangle of evagination framework (3) is wrapped up (1), (2) in it.Referring to Fig. 2, the cross section of three stem stems of iron core all is cylindrical to being connected into by two indents semicircles and an evagination semicircle, and the cross section of three stem stems of iron core that assembling finishes is circle.Three the single-phase iron cores that whole iron core adopted of reeling all are that silicon strip continuous coiling after cut-out forms, rather than the iron core that coiling is good successively cuts off.Referring to Fig. 3, if the cross sectional shape of every open coil iron core is step (an external semicircle), the cross section of three stem stems of iron core that assembling finishes is step (external circle).Referring to Fig. 4, if the cross sectional shape of every open coil iron core is polygon (an external semicircle), the cross section of three stem stems of iron core that assembling finishes is polygon (external circle).The cross sectional shape of corresponding coil cover is circular.Referring to Fig. 5, Fig. 6, Fig. 7, the iron core opening part is to have the fracture and the billot that evenly distributes to reel successively by silicon strip to form, and aperture position can be in side column (10)～(12), and aperture position can be in last yoke (4)～(6), and aperture position also can be in following yoke (7)～(9).Referring to Fig. 8, assembly unit finishing type iron core is heat-treated after shaping, again open core is opened into a U type at the aperture slots place, the high and low pressure coil that coiling is good is packed in three iron core column, then the closed layer by layer recovery colligation of iron core is fixedly mounted folder and puts into fuel tank and add upper cover, draw three bushings (13) and three low-tension bushings (19) and ground wire (16) from the top, oil level indicator (15), exhaust apparatus (18), shunting switch (17), four groups of fin (14) are distributed on four sides.Referring to Fig. 9, (20)～(21) are fracture site monolithic silicon steel sheet view on side column; (22)～(23) be the monolithic silicon steel sheet view of fracture site at last yoke; (24)～(25) be the monolithic silicon steel sheet view of fracture site at following yoke.

Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, relevant expert, insider, engineers and technicians under the situation that does not break away from the spirit and scope of the present invention, all can make various modification or perfect.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.

Claims

1. high performance oil-immersed type power transformer for hatch winding iron core, it is characterized in that iron core is the semicircular open coil iron core of indent (1) by two face shapings for ' mouth ' font cross section, (2) the rectangle framework of a horizontal stroke of formation placed side by side ' day ' font, another cross section is that the semicircular open coil iron core rectangle of evagination framework (3) is with (1), (2) wrap up in it, the cross section of three stem stems of iron core all is cylindrical to being connected into by two indents semicircles and an evagination semicircle, for circular, corresponding different capabilities transformer core column section diameter of a circle scope is that 60mm is to 500mm entirely in the cross section of three posts of iron core that assembly unit finishes.

2. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1, the cross sectional shape that it is characterized in that every single-phase open coil iron core (1), (2), (3) is step (an external semicircle), the cross section of three posts of iron core that assembly unit finishes is step (external circle) entirely, the scope of corresponding different capabilities transformer n is 5～19, and the diameter range of cross section circumscribed circle is that 60mm is to 500mm.

3. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1, the cross sectional shape that it is characterized in that every single-phase open coil iron core (1), (2), (3) is polygon (an external semicircle), the cross section of three posts of iron core that assembly unit finishes is polygon (external circle) entirely, the scope of the polygon number of corresponding different capabilities transformer core column section is 8～50, and the diameter range of cross section circumscribed circle is that 60mm is to 500mm.

4. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1 is characterized in that the fracture site of iron core can be three positions, in side column (10)～(12), in last yoke (4)～(6), in following yoke (7)～(9).

5. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1, it is characterized in that every single-phase iron core be by silicon strip after cut-out continuously coiling form, reel silicon strip thickness that every single-phase iron core adopted between 0.18mm～0.35mm.

6. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1 is characterized in that the size range of the iron core of corresponding different capabilities, and the scope of H is that 400mm is to 2000mm; The scope of H1 is that 350mm is to 1800mm; The scope of Hw is that 300mm is to 1500mm; The scope of L1 is that 125mm is to 450mm; The scope of L is that 400mm is to 950mm; The scope of Mo is that 170mm is to 750mm; The yoke wide region is that 100mm is to 350mm.

7. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1 is characterized in that the apparent size scope of corresponding different capabilities transformer, and the scope of h is that 700mm is to 2800mm; The scope of h1 is that 200mm is to 1200mm; The scope of b1 is that 500mm is to 2500mm; The scope of b2 is that 400mm is to 1800mm.

8. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1, three bushings (13) that it is characterized in that the transformer outer tip end are first row, oil level indicator (15), exhaust apparatus (18), shunting switch (17) are second row, three low-tension bushings (19) and ground wire (16) are the 3rd row, and four groups of fin (14) are distributed on four sides.

9. oil-immersed type power transformer for hatch winding iron core as claimed in claim 1 is characterized in that the kind and the capacity of related transformer, three-phase oil-immersed power transformer, and capacity is at 30KVA～3150KVA.