CN101271756A

CN101271756A - Hatch coiled iron core oil-immersed type transformer

Info

Publication number: CN101271756A
Application number: CNA2007100381696A
Authority: CN
Inventors: 齐侠
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-19
Filing date: 2007-03-19
Publication date: 2008-09-24

Abstract

The invention provides an open coiled iron core oil dipped transformer, comprising an oil tank, a high voltage bushing (13), a low voltage bushing (11), a grounded wire (16), an oil gauge (15), an exhaust device (12), a tapping switch (10) and four groups of radiators (14). The iron core consists of two single-phase open coiled iron cores which are provided with semi-round section and arranged in parallel, a single-phase open coiled iron core which is enwrapped outside the two iron cores and provided with a frame-shaped section. During the production process, as the opening of the iron core, the coil can be individually enwound, and the iron core can be opened to carry out the installation or to replace the coil at the opening gap during the production and maintenance process.

Description

Hatch coiled iron core oil-immersed type transformer

Affiliated technical field

Type of the present invention relates to a kind of high performance power transformer.

Background technology

The iron core major part of at present domestic traditional oil-filled transformer is a laminated structure, is formed by the silicon steel sheet stack.Because all there is many places mitre in the iron core of stack moulding in junction, every layer of limit, thereby causes the increase of magnetic resistance and iron loss, and the exciting current of transformer is also increased, and has reduced power factor, has had a strong impact on the power supply quality of electrical network.The transformer core seam has also caused the big problem of running noises.In order to overcome the defective of above-mentioned laminated core structure, domestic in recent years have many producers to adopt the takeup type appendiron core transformer, this transformer core is that the silicon strip continuous reeling by definite shape forms, and transformer performance has a certain upgrade, and is mainly reflected in that no-load loss is low, noise is little.But because the takeup type iron core is a jointless structure, also there are problems, as: manufacturing equipment production capacity is limited, needs special-purpose spooling equipment during the transformer coil coiling, and be with iron core to wind the line, winding process difficulty, complexity, production efficiency are low.Especially can't solve big-and-middle-sized transformer coiling and paint-dipping process.The maintenance aspect is very difficult especially, in case the transformer coil breaks down, just can't take off coil from iron core and change, and must cause scrapping of whole transformer.Owing to have above-mentioned shortcoming, restricted the popularization and the use of no seam volume iron core.

Summary of the invention

Type of the present invention provides a kind of hatch coiled iron core oil-immersed type transformer, thoroughly solves the low shortcoming of laminated core structure oil-filled transformer performance and no seam coiled iron core oil-immersed type transformer and has defective on the manufacturing process.Open coil iron core is exactly in the iron core manufacture process, the curve silicon steel sheet billot of being left by the transformer curve cutting machine of special use carries out successively turning to continuously the open coil iron core that the cross section is a quasi-circular after disconnection, a fracture is arranged in every layer, by clocklike carrying out linear array, fracture site is located at yoke or yoke down under coiling iron core machine automatic control system for every layer of fracture site.The cross sectional shape of three stem stems in the described transformer core of type of the present invention is circle, step (external circle) or polygon (external circle), and the cross sectional shape of corresponding high and low pressure coil cover is circular.Because the open nature that iron core has makes whole transformer not need special-purpose volume iron-core coil spooling equipment in producing and keeping in repair.The type of the oil-immersed power transformer of type of the present invention and capacity: the capacity of threephase oil immersed transformer can be at 30KVA～3150KVA.

The technical scheme that its technical problem that solves type of the present invention adopts is: the iron core of this transformer is the semicircular single-phase open coil iron core of the indent rectangle framework of forming a horizontal stroke ' day ' font placed side by side by two face shapings for its cross section of ' mouth ' font, is that the semicircular single-phase open coil iron core frame structure of evagination closely wraps reality in their outsides by a cross section, and whole iron core adopts thickness to roll to the cold rolled silicon steel billot of 0.35mm at 0.18mm and forms.Three the single-phase iron cores that whole iron core adopted of reeling all be silicon strip after cut-out continuously coiling form, rather than the iron core that coiling is good successively cuts off, the advantage of coiling is to make iron core more closely reach the iron core fracture neatly not have burr continuously.The cross section of three stem stems of iron core all is to be formed by two indents semicircles and the semicircle butt joint of evagination, and three stem stem cross sections are circular.The cross sectional shape of every single-phase open coil iron core that type of the present invention is above-mentioned can also be step (external semicircle) or polygon (external semicircle), and the cross section of three stem stems of iron core that assembly unit finishes is corresponding to be step (external circle) or polygon (external circle).The aperture position of every single-phase open coil iron core can be at last yoke or following yoke.Can respectively the iron core opening part successively be opened after the annealed PROCESS FOR TREATMENT of three-phase three stem stem open coil iron cores that the single-phase open coil iron core of employing said structure is made and be ' U ' type structure, the good transformer of coiling required elementary, secondary coil are inserted in three stem stems, then that iron core is closed layer by layer and folder is installed, the iron core that assembles is put into fuel tank add upper cover and draw terminals, four groups of fin are distributed on four sides.

The beneficial effect of type of the present invention is, hatch coiled iron core oil-immersed type transformer possesses good characteristics such as magnetic circuit is shorter, power factor is higher, volume is littler, the ability of anti-sudden short circuit is strong, process conditions are good, and the transformer of doing capacity of the same race can descend more than 10% than the production cost of traditional transformer.Do not need the spooling equipment of special-purpose volume iron core special use in manufacturing process, coil coiling has separately improved production efficiency.In a single day transformer in use coil breaks down, and the transformer core opening part can be opened, and takes out coil then and keeps in repair and change, and has fundamentally solved the problems that the volume iron core produces owing to no seam.

Description of drawings

Below in conjunction with drawings and Examples type of the present invention is further specified.

Fig. 1 is the iron core view of type of the present invention.

Fig. 2 is that core column section of the present invention is circular view.

Fig. 3 is that core column section of the present invention is the view of step (external circle).

Fig. 4 is that core column section of the present invention is the 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.

The view of the iron core that assembling finishes in Fig. 7 type of the present invention.

The external view 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 in the iron core stem stem cross section of transformer is referred to as the progression (representing with n) of iron core among Fig. 3, 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 Fig. 3.

The scope of the polygon number in the iron core stem stem cross section of corresponding different capabilities transformer 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.

Specific embodiments

Referring to Fig. 1, this transformer core is the rectangle framework of the semicircular single-phase open coil iron core of indent (1), (2) horizontal strokes of formation placed side by side ' day ' font by two face shapings for ' mouth ' font cross section, and another cross section is that the semicircular single-phase open coil iron core rectangle framework of evagination (3) is wrapped up (1), (2) in it.Referring to Fig. 2, the cross section of three stem stems of iron core all is circular by two indents semicircles and the semicircle butt joint of evagination, 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. 9, the iron core opening part is to have the fracture and the billot that evenly distributes to reel successively by silicon strip to form, aperture position can be when last yoke (4)～(6), the shape (18) of every silicon steel sheet of a shape of every silicon steel sheet of two single-phase iron cores of internal layer (17) and an outer single-phase iron core; Referring to Fig. 6, Fig. 9, aperture position also can be in following yoke (7)～(9), the shape (19) of every silicon steel sheet of a shape of every silicon steel sheet of two single-phase iron cores of internal layer (20) and an outer single-phase iron core.Referring to Fig. 7, assembly unit finishing type iron core is heat-treated after shaping, again open core is opened into a U type layer by layer at the aperture slots place, the high and low pressure coil that coiling is good is packed in three iron core column, then with iron core closed layer by layer restore colligation fixed installation folder and put into fuel tank add upper cover.Referring to Fig. 8, draw three bushings (13) and three low-tension bushings (11) and ground wire (16) from the top, oil level indicator (15), exhaust apparatus (12), shunting switch (10), four groups of fin (14) are distributed on four sides.

Claims

1. hatch coiled iron core oil-immersed type transformer, it is characterized in that: the iron core of transformer is the semicircular single-phase 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 single-phase open coil iron core rectangle framework of evagination (3) is with (1), (2) wrap up in it, the cross section of three stem stems of iron core all is circular by two indents semicircles and the semicircle butt joint of evagination, for circular, the stem stem cross section diameter of a circle scope of corresponding different capabilities transformer is that 60mm is to 500mm entirely in the cross section of three posts of iron core that assembly unit finishes.

2. hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: the cross sectional shape of 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. hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: the cross sectional shape of 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. hatch coiled iron core oil-immersed type transformer according to claim 1 is characterized in that: the fracture site of iron core is two positions, in last yoke (4)～(6), in following yoke (7)～(9).

5. hatch coiled iron core oil-immersed type transformer according to claim 1 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. hatch coiled iron core oil-immersed type transformer according to claim 1 is characterized in that: the size range of the iron core of corresponding different capabilities transformer, the scope of H are 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. hatch coiled iron core oil-immersed type transformer according to claim 1 is characterized in that: the apparent size scope of corresponding different capabilities transformer, the scope of h are 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. hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: three bushings (13) of transformer outer tip end are first row, oil level indicator (15), exhaust apparatus (12), shunting switch (10) are second row, three low-tension bushings (11) and ground wire (16) are the 3rd row, and four groups of fin (14) are distributed on four sides.

9. hatch coiled iron core oil-immersed type transformer according to claim 1 is characterized in that: the kind and the capacity of relevant dry-type transformer, and threephase oil immersed transformer, capacity is at 30KVA～3150KVA.