CN101350245A - Oil-immersed type transformer for hatch winding iron core - Google Patents

Abstract

The invention relates to an oil-immersed type transformer with open-ended roll-cores, which comprises an oil tank, a high-tension bushing (13), a low-tension bushing (11), an earth wire (16), an oil level indicator (15), an exhaust unit (12), a tapping switch (10) and four groups of radiating flanges (14), wherein roll-cores of the transformer are formed from two open-ended roll-cores whose sections are in semi-oblate shape and which are arranged in parallel, and an open-ended roll-core whose square-set shape section is also in the semi-oblate shape and is wrapped outside the two roll-cores. During the production process, since the roll-cores are open-ended, thereby coils can be separately winded, and the coils can be installed or replaced through opening the roll-cores from the gap of the opening during the production and the maintenance.

Description

A kind of hatch coiled iron core oil-immersed type transformer

Affiliated technical field

Type of the present invention relates to transformer manufacture technology.

Background technology

Oil-filled transformer mainly is made up of iron core, coil and fuel tank, and the iron core major part of at present domestic 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, and 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, and its iron core is an open coil iron core.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 successively turns to the cross section oblate single-phase open coil iron core that is as the criterion continuously 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.Type of the present invention has thoroughly solved the low shortcoming of laminated core structure oil-filled transformer performance and no seam coiled iron core oil-immersed type transformer and has had defective on the manufacturing process.The cross sectional shape of three stem stems of the described transformer core of type of the present invention can be oblateness, step (external oblateness) or polygon (external oblateness), and the cross sectional shape of corresponding coil cover is oblate.Because the open nature that iron core presents makes whole transformer not need not have the coil-winding equipment of seam volume iron core special use in producing and keeping in repair.The kind of the oil-filled transformer of type of the present invention and capacity: threephase oil immersed transformer, capacity can be at 30KVA～3150KVA.

The technical scheme that its technical problem that solves type of the present invention adopts is: the cross section of the iron core stem stem of this oil-filled transformer is for oblate.The iron core of this transformer is to be horizontal " day " font iron core framework by two face shapings for its cross section of " mouth " font is indent half face shaping of oblate single-phase open coil iron core formation placed side by side, in horizontal stroke " day " font iron core framework outside by a face shaping be greatly its tee section of " mouth " font be evagination partly oblate single-phase open coil iron core framework closely wrap reality.The cross section of three stem stems of iron core all is to be formed by two indents, half oblateness and evagination half an oblate butt joint, and three stem stem cross sections are oblate.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 are that silicon strip continuous coiling after cut-out forms, rather than the iron core that coiling is good successively cuts off, and the advantage of coiling is to make iron core more closely reach the iron core fracture neatly not have burr continuously.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 partly oblate) or polygon (external half is oblate), and the cross section of three stem stems of iron core that assembling finishes is corresponding to be step (external oblateness) or polygon (external oblateness).Coupling part between stem stem and the stem stem is an iron core iron yoke, and the iron core aperture position can be in that down yoke also can be at last yoke.Be the U type after the open core place successively opened respectively, the good transformer of coiling required elementary, secondary coil are inserted in three stem stems, then with iron core closed layer by layer and install, lower clamping piece, the iron core that assembles is put into fuel tank add upper cover and draw terminals, four groups of fin of casing are distributed in four sides.

The beneficial effect of type of the present invention is, this oil-filled 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.Particularly stem stem is that oblate structure no-load loss descends 10% again than other coiled core, no-load current descends about 20%, noise reduces more than 4 decibels, saves silicon strip 10% than the volume iron core of the rounded structure in cross section, and the whole cost of transformer reduces more than 10%.

Description of drawings

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

Fig. 1 core post of the present invention is oblate stem stem cross sectional view.

Fig. 2 core column section of the present invention view.

Fig. 3 core post of the present invention is the stem stem cross sectional view of step (external oblateness).

Fig. 4 core post of the present invention is the stem stem cross sectional view of polygon (external oblateness).

The iron core decomposition view of Fig. 5 type of the present invention.

Fig. 6 fracture site is at the view of the iron core of last yoke.

Fig. 7 fracture site is at the view of the iron core of following yoke.

The view of the iron core that assembling finishes in Fig. 8 type of the present invention.

The external view of Fig. 9 type of the present invention.

The view of every layer of silicon steel sheet of the single-phase iron core of Figure 10.

The scope of the size range of the iron core of corresponding different capabilities transformer: H among Fig. 1, Fig. 3, Fig. 4 That 300mm is to 2000mm; The scope of HL is that 350mm is to 1800mm; The scope of L is 400mm To 2550mm; The scope of Mo is that 170mm is to 1150mm; The yoke wide region is that 50mm is to 700mm.

The oblateness of the core section of transformer is formed square by a rectangle and two semicircles among Fig. 2 The shape length of side is that the radius of two semicircles of a all is R; The iron core stem stem cross section of corresponding different capabilities transformer Scope is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.

The number of steps in the iron core stem stem cross section of Fig. 3 transformer is referred to as the progression (representing with n) of iron core, The scope of the iron core n of corresponding different capabilities transformer is that n is 5 among 5～19, Fig. 3, and namely progression is 5 Level; The external oblate size range in iron core stem stem cross section of corresponding different capabilities transformer is the scope of a Be 10mm～300mm, the scope of R is 20mm～200mm.

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; The external oblate size range in iron core stem stem cross section of corresponding different capabilities transformer is that the scope of a is 10mm～300mm, the scope of R is 20mm～200mm.

The scope of the size range of corresponding different capabilities transformer: h is that 500mm is to 3000mm among Fig. 9; The scope of h1 is that 100mm is to 1500mm; The scope of b1 is that 500mm is to 3000mm; The scope of b2 is that 200mm is to 1800mm.

Specific embodiments

Referring to Fig. 5, this transformer core is the rectangle framework of indent half oblate single-phase open coil iron core (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 evagination half oblate single-phase open coil iron core rectangle 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 oblate to being connected into oblateness by two indents, half oblateness and an evagination half, and the cross section of three stem stems of iron core that assembling finishes is oblateness.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 (external half is oblate), the cross section of three stem stems of iron core that assembling finishes is step (external oblateness).Referring to Fig. 4, if the cross sectional shape of every open coil iron core is polygon (external half is oblate), the cross section of three stem stems of iron core that assembling finishes is polygon (external oblateness).The cross sectional shape of corresponding coil cover is oblate.Referring to Fig. 6, Figure 10, 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. 7, Figure 10, 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. 8, 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. 9, 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 (10)

1. hatch coiled iron core oil-immersed type transformer, it is characterized in that: the iron core of transformer is indent half oblate single-phase open coil iron core (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 evagination half oblate single-phase open coil iron core rectangle framework (3) is with (1), (2) wrap up in it, the cross section of three stem stems of iron core all is oblate to being connected into oblateness by two indents, half oblateness and an evagination half, the cross section of three posts of iron core that assembly unit finishes is entirely for oblate, the iron core stem stem cross section scope of corresponding different capabilities transformer is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.

2. a kind of hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: when the cross sectional shape of every single-phase open coil iron core (1), (2), (3) is step (external half is oblate), the cross section of three posts of iron core that assembly unit finishes is step (external oblateness) entirely, the scope of the iron core n of corresponding different capabilities transformer is 5～19, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.

3. a kind of hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: when the cross sectional shape of every single-phase open coil iron core (1), (2), (3) is polygon (external half is oblate), the cross section of three posts of iron core that assembly unit finishes is polygon (external oblateness) entirely, the scope of the polygon number in the iron core stem stem cross section of corresponding different capabilities transformer is 8～50, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.

4. a kind of hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: the fracture site of iron core when last yoke (4)～(6), the shape (18) of every silicon steel sheet of the outer single-phase iron core of the shape of every silicon steel sheet of two single-phase iron cores of internal layer (17) and.

5. a kind of hatch coiled iron core oil-immersed type transformer according to claim 1, it is characterized in that: the fracture site of iron core when 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.

6. a kind of 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.

7. a kind of 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 300mm is to 2000mm; The scope of HL is that 350mm is to 1800mm; The scope of L is that 400mm is to 2550mm; The scope of Mo is that 170mm is to 1150mm; The yoke wide region is that 50mm is to 700mm.

8. a kind of 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 is that 500mm is to 3000mm; The scope of h1 is that 100mm is to 1500mm; The scope of b1 is that 500mm is to 3000mm; The scope of b2 is that 200mm is to 1800mm.

9. a kind of 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.

10. a kind of hatch coiled iron core oil-immersed type transformer according to claim 1 is characterized in that: the kind of corresponding transformer is a threephase oil immersed transformer, capacity 30KVA～3150KVA.

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