CN201319306Y

CN201319306Y - Three-dimensional wound core-enveloped dry-type transformer

Info

Publication number: CN201319306Y
Application number: CNU2008201998621U
Authority: CN
Inventors: 柳溪; 周屏; 黄雁
Original assignee: KUNMING SGM ELECTRIC CO Ltd
Current assignee: KUNMING SGM ELECTRIC CO Ltd
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2009-09-30
Anticipated expiration: 2018-12-03

Abstract

The utility model relates to a three-dimensional wound core-enveloped dry-type transformer, which belongs to the technical field of the design and manufacturing of transformers. The structure is as follows: a core is a three-dimensional wound core; high-voltage coils and low-voltage coils are of a cylinder type; and the transformer has the following characteristics: inner and outer insulating cylinders for the high-voltage coils and low-voltage coils are arranged; the low-voltage coils are arranged outside the single-phase cores; and the coils are enveloped, shaped and solidified by insulating sealant or being enveloped by the method of vacuum pressure impregnation. The utility model has the following advantages: (1) the three-phase magnetic circuit, the current balance and the electric property are good, the mechanical strength is high, the surge capacity is strong, energy can be saved, consumption can be reduced, the noise is low, the volume is small, and the weight is light; (2) the whole coils are formed into a firm integral body, the damp-proof, dust-proof and dirt-proof properties of the transformer are good, the environmental adaptability is good, the heat impact-bearing capability is strong, the refractability is good, and the utility model resolves the defects of the open type coil, including easy dust accumulation, poor damp-proof property and poor dirt-proof property; (3) manufacturability is good, the quality can be easily controlled, and the transformer can be repaired.

Description

3 D stereo volume iron core encapsulated type dry-type transformer

Technical field

The utility model belongs to the design and manufacturing technology field of transformer, is specially a kind of dry-type power transformer, particularly a kind of 3 D stereo coil iron core dry-type power transformer.

Background technology

3 D stereo volume iron core is a kind of takeup type iron core, its iron yoke and stem stem be with the silicon strip material webs around forming, the cross section of iron yoke and stem stem can be " complex cross section " or " D tee section ", " half garden tee section ".The stem stem of 3 D stereo volume iron core is three-dimensional equilateral triangle to be arranged, and iron core is put together by three single frame iron cores.

Present domestic 3 D stereo coil iron core dry-type transformer has two kinds, a kind of is that core structure is a 3 D stereo volume iron core, loop construction is worn-out open type, this transformer coil is by glass fiber covered wire or Nomex paper covered wire, coiling is a disc coil, behind the impregnated insulating paint, coil is not done any sealing, so be also referred to as worn-out open type.The great advantage of this transformer is that each circle line all contacts with cooling air, thermal diffusivity is very good, but maximum shortcoming is to deposit dust on the line cake horizontal plane of coil easily, when if the impregnating varnish moisture resistance is bad, transformer makes moist easily, the dirty ability of anti-soil, and the volume ratio cylindrical layer winding is big.Another kind is that core structure is a 3 D stereo volume iron core, loop construction is the poured with epoxy resin formula, the coil of this transformer is a cylindrical layer winding by glass fiber covered wire or enamelled wire coiling, and the high and low pressure coil is not established inside and outside insulating cylinder and insulating end ring, adopts the manufacturing of vacuum pouring technology.This 3 D stereo volume iron core poured with epoxy resin formula transformer appearance looks elegant, volume is little, but manufacturing process complexity, difficult quality control, in case quality problems or in service breaking down appear in transformer in manufacture process, transformer then can't be repaired, and can only scrap, and therefore this transformer is difficult to promote on market.

The utility model content

The purpose of this utility model is the shortcoming that overcomes prior art, a kind of 3 D stereo volume iron core encapsulated type dry-type transformer is provided, its not only moistureproof, dustproof, anti-filthy ability is good, accommodative ability of environment is strong, and volume is little, and anufacturability is good, can be non-maintaining, reliability height, thermal endurance class height, if in service breaking down, transformer can be taken reparation apart.

Structure of the present utility model is: iron core is a 3 D stereo volume iron core, the high and low pressure coil is a drum type brake, it is characterized in that being provided with the inside and outside insulating cylinder of high and low pressure coil, low-voltage coil is arranged on the outside of single-phase iron core, high-tension coil is arranged on the outside of low-voltage coil, and coil seals forming and hardening by electric insulating sealant or vacuum pressure impregnation is sealed.

The said 3 D stereo volume of the utility model iron core is a prior art: it is put together by three single frame iron cores, single-phase iron core column is reeled by continuous silicon strip and is constituted, the cross section of any one single-phase iron core can be " complex cross section " or " D tee section ", " half garden tee section ", its center of circle is triangular arranged, and the extended line of the diameter of the cross section of single-phase iron core column is the central point by equilateral triangle all.

The said high and low pressure coil of the utility model can be formed by the Nomex paper covered wire or the Copper Foil coiling of H level enamelled wire or du pont company, and coil-conductor insulation, layer insulation, the insulation of coil upper and lower end parts and the inside and outside insulating cylinder of high and low pressure coil all can adopt the Nomex paper of du pont company or other F level, H level, C class F insulating material F.Electric insulating sealant and treatment process that said electric insulating sealant is sealed forming and hardening are prior art, and the treatment process that said vacuum pressure impregnation is sealed also is prior art.

The utility model high and low pressure coil can be if do not establish axially and the radial ventilation road, and high-tension coil can be segmentation or subsection cylindrical formula not, can be provided with or not establish insulating end ring up and down, and insulating end ring can be circle or peach shape.

The utility model transformer can be provided with rolls up six prismatic iron core folder and the cross-over blocks that iron core compresses and clamps with high and low pressure coil and solid.

The utlity model has following advantage:

(1) three-phase magnetic circuit and current balance type, good electric property, mechanical strength height, thermal endurance class are that H level (or C level, F level), capability of overload are strong, energy-saving and cost-reducing, low, the compact conformation of noise, and volume is little, in light weight.

(2) because the high and low pressure coil of transformer is that coiling is layer coil (being cylindrical layer winding), and seal curing with Nomex paper and insulating cement, whole winding forms a solid integral body, its protection against the tide, dustproof, anti-filthy ability are very good, and accommodative ability of environment is strong, and it is strong to bear the thermal shock ability, fire resistance is good, solved worn-out open architecture coil and deposited dust easily, moisture resistance is poor, the defective of the dirty ability of anti-soil.

(3) anufacturability is good, and quality is controlled easily, and transformer can be repaired.

Description of drawings

Fig. 1 is the plan structure schematic diagram after iron core and the coil combination among the embodiment 1.

Fig. 2 is the main TV structure schematic diagram of embodiment 1.

Fig. 3 is the single frame core structure schematic diagram of embodiment 1.

Fig. 4 is the A-A view among Fig. 3.

Fig. 5 is the volume iron core overall structure schematic perspective view of embodiment 1.

Fig. 6 is the volume iron core overall structure vertical view of embodiment 1.

Fig. 7 is the coil sectional structure schematic diagram of embodiment 1.

Fig. 8 is the coil sectional structure schematic diagram of embodiment 2.

Embodiment

Embodiment 1: see Fig. 1～7.High-tension coil 1, low-voltage coil 2 and three-dimensional volume iron core 3 compress it and clamp by six prismatic iron core folders 4 and cross-over block.Low-voltage coil 2 is arranged on the outside of single-phase iron core, and high-tension coil 1 is arranged on the outside of low-voltage coil, and transformer is sealed forming and hardening by electric insulating sealant.A, B, C are the high-voltage connection terminal among Fig. 1, and a, b, c are the low-voltage lead terminal.High-tension coil 1, formed by the coiling of Nomex paper covered wire, low-voltage coil 2 is by Copper Foil or lead coiled.Coil-conductor insulation, layer insulation, the insulation of coil upper and lower end parts and coil insulation tube also all adopt the Nomex paper of du pont company.Iron core is by three single frame iron cores (Fig. 3) three-dimensional volume iron core (Fig. 5) that is put together, and single-phase iron core column is reeled by continuous silicon strip and constituted.The extended line of the diameter of the cross section of single-phase iron core column is the central point (Fig. 6) by equilateral triangle all.As shown in Figure 7, loop construction comprises the upper and lower side circle 6 of the interior insulating cylinder 10 of high-tension coil 1, low-voltage coil 2, low-voltage coil 2 and external insulation tube 9, high-tension coil 1, middle ends circle 7, the interior insulating cylinder 5 of high-tension coil 1 and external insulation tube 8.Low-voltage coil 2 coilings are drum type brake, and high-tension coil 1 coiling is the subsection cylindrical formula that divides vertically.

Embodiment 2: the coil sectional structure is seen Fig. 8.Iron core is 11 among the figure, low-voltage coil is 12, the interior insulating cylinder of low-voltage coil 12 is 13, the external insulation tube is 14.High-tension coil is 15, and the upper and lower side circle of high-tension coil 15 is 16, and the middle ends circle is 17.The interior insulating cylinder of high-tension coil 15 is 18, the external insulation tube is 19, low-voltage coil be 12 and high-tension coil 15 between insulating cylinder be 20.High-tension coil 15 is the subsection cylindrical formula by H level enamel-cover lead or the coiling of Nomex paper bag lead, and low-voltage coil 12 is a drum type brake by Copper Foil or the coiling of Nomex paper bag lead.Low-voltage coil 12 is provided with axial ventilation road 21.High-tension coil is provided with axial ventilation road 22 and horizontal air duct 23.Insulating cylinder 20 places between low-voltage coil 12 and the high-tension coil 15, and forming

air duct

24,25 also is air duct.Low-voltage coil 12 and high-tension coil 15 are all made layer insulation with Nomex paper.By upper and lower side circle 16 and middle ends circle 17 coil is sealed with insulating cement and to be solidified or vacuum pressure impregnation is sealed.

Above embodiment is only in order to be further described the utility model, and scope of the present utility model is not subjected to the limitation of illustrated embodiment.

Claims

1, a kind of 3 D stereo volume iron core encapsulated type dry-type transformer, iron core is a 3 D stereo volume iron core, the high and low pressure coil is a drum type brake, it is characterized in that being provided with the inside and outside insulating cylinder of high and low pressure coil, low-voltage coil is arranged on the outside of single-phase iron core, high-tension coil is arranged on the outside of low-voltage coil, and coil seals forming and hardening by electric insulating sealant or vacuum pressure impregnation is sealed.

2,, it is characterized in that the high and low pressure coil if do not establish axial and radial ventilation road as the said encapsulated type dry-type transformer of claim 1.

3,, it is characterized in that high-tension coil is segmentation or subsection cylindrical formula not as the said encapsulated type dry-type transformer of claim 1.

4, as the said encapsulated type dry-type transformer of claim 1, it is characterized in that having on the high-tension coil or not establishing insulating end ring.

5,, it is characterized in that being provided with high and low pressure coil and solid are rolled up six prismatic iron core folder and the cross-over blocks that iron core compresses and clamps as the said encapsulated type dry-type transformer of claim 1.