CN2755748Y

CN2755748Y - Open ventilating dry transformer with retardant paper paint-immersed insulation

Info

Publication number: CN2755748Y
Application number: CN 200420075341
Authority: CN
Inventors: 李建坤; 谷文天; 王涛; 马仪成; 吕振卯; 王正洪
Original assignee: XUJI TRANSFORMER CO Ltd; Xuji Group Co Ltd
Current assignee: XUJI TRANSFORMER CO Ltd; Xuji Group Co Ltd
Priority date: 2004-12-08
Filing date: 2004-12-08
Publication date: 2006-02-01
Anticipated expiration: 2014-12-08

Abstract

The utility model discloses an open ventilating dry transformer with retardant paper paint-immersed insulation, which comprises an iron core. A low-voltage coil is concentrically sheathed on a core post of the iron core, and a high-voltage coil is sheathed at the external side of the low-voltage coil. An axial air drain is arranged between the high-voltage coil and the low-voltage coil; an upper clamp piece and a lower clamp piece pass through a clamping iron core; the high-voltage coil and the low-voltage coil are fixed by strutting pieces on the upper clamp piece and the lower clamp piece. A silicon rubber shim is arranged among the high-voltage coil, the low-voltage coil and the strutting pieces; the low-voltage coil and the core post of the iron core are braced by a silicon rubber bar. The low-voltage coil and the high-voltage coil are braced by a silicon rubber bar in the axial air drain. The low-voltage coil is wound on an insulating cylinder by copper foil or paper wrapped copper wire; an insulation supporting bar is supported between the coil layer and the insulating cylinder. The high-voltage coil is wound on the insulating cylinder in a cake type structure of the paper wrapped copper wire. An insulation supporting bar is supported between the coil layer and the insulating cylinder. By adopting the structure, the utility model has the advantages of low noise, novel structure, and good damp-proof effect and good fire-proof effect.

Description

Open-ventilating formula fire retardant papers dipping lacquer dry-type transformer

Technical field

The utility model relates to fire retardant papers dipping lacquer Dry-Transformer Technology field.

Background technology

Transformer is one of requisite key element in the power transmission and transformation process, and in recent years, dipping lacquer dry-type transformer range of application constantly enlarges.Along with fire retardant papers such as NOMEX paper are applied to the progress of dipping lacquer type dry-type transformer and insulating process, promoted the technical performance of dipping lacquer dry-type transformer.Present fire retardant papers dipping lacquer dry-type transformer generally comprises iron core, be set with the low-voltage coil and the outer field high-tension coil of internal layer on the iron core, be lined with the fire retardant papers insulating stay in the axial cooling airway between the high and low pressure coil, the yoke at iron core top clamps with folder, and coil bottom is provided with strutting piece; Between yoke and folder, between yoke and coil, be provided with resistant to elevated temperatures electrically insulating silicone rubber pad between coil and the strutting piece.Its low-voltage coil can adopt Copper Foil or fire retardant papers copper-clad wire-wound on insulating cylinder, carries out drying behind the pressure impregnation with solvent-free immersion paint then and makes; High-tension coil generally adopts the fire retardant papers paper bag copper cash of multilayer to be cake formula structure on insulating cylinder; Carry out drying behind the pressure impregnation with solvent-free immersion paint then and make.Existing fire retardant papers dipping lacquer dry-type transformer exists following shortcoming: 1, the heat dispersion of high and low pressure winding is relatively poor; 2, between the high-low pressure winding and the insulation effect between low pressure winding and the iron core undesirable, and do not have precautions against earthquakes, noise is big during work, and is easily loosening; 3, combine not firmly between coil supports and the coil, the electrically insulating silicone rubber pad comes off when transformer work shakes easily.

The utility model content

The purpose of this utility model provides a kind of open-ventilating formula fire retardant papers dipping lacquer dry-type transformer that thermal diffusivity is good, overall mechanical strength is high of high-voltage coil and low-voltage coil.

The technical solution of the utility model is: a kind of open-ventilating formula fire retardant papers dipping lacquer dry-type transformer, comprise iron core, the low-voltage coil concentric locking collar is on the iron core stem stem, high-tension coil is enclosed within the low-voltage coil outside, high, leave axial air flue between the low-voltage coil, on, lower clamping piece is by clamping iron core, high-voltage coil and low-voltage coil is by last, strutting piece on the lower clamping piece is fixed, high, be provided with the silicon rubber pad between low-voltage coil and the strutting piece, by silicon rubber rod stretching, pass through the silicon rubber rod stretching in the axial air flue between low-voltage coil and the high-tension coil between described low-voltage coil and the iron core stem stem.

Described low-voltage coil be with Copper Foil or paper bag copper cash on insulating cylinder, support between coil layer and insulating cylinder and be provided with the insulation support bar.

Insulation support bar between described low-voltage coil and insulating cylinder is a H level I shape support bar.

Described high-tension coil is to be wound on the insulating cylinder with paper bag copper cash cake formula structure, supports being provided with the insulation support bar between coil layer and insulating cylinder.

Insulation support bar between described high-tension coil and insulating cylinder is a ceramic gasket, and insulating cylinder is provided with T type stay, and ceramic gasket and T type stay are adhesively fixed together.

Described high and low pressure coil is to press the nail and the strutting piece of upper and lower folder to be fixed together by elasticity.

Effect advantage of the present utility model is: between the high and low pressure coil, between low-voltage coil and the iron core all by silicon as glue rod stretching, the damping of can effectively insulating makes transformer noise reduce good insulation preformance; The interlayer of low-voltage coil adds the I shape stay that H level fire retardant papers is made, and not only can improve the class of insulation, and the air flue gap of Xing Chenging helps heat radiation simultaneously, reduces iron loss; High-tension coil adopts paper bag copper cash cake formula structure, adopts ceramic gasket to cooperate support with the T type stay of insulating cylinder between cake, helps heat radiation thereby form air flue; The high and low pressure coil presses the supporting construction on nail and silicon rubber pad and the folder to fix by elasticity, effectively damping, and anti-locking mechanism is loosening.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the A portion amplifier section of Fig. 1;

Fig. 4 is the cross sectional representation of a winding of the present utility model;

Fig. 5 is the structural representation of the ceramic gasket in the high-tension coil;

Fig. 6 is the structural representation of T type stay of the insulating cylinder of high-tension coil;

Fig. 7 is the structural representation of the I shape stay in the low-voltage coil.

Embodiment

As Fig. 1～shown in Figure 7, the open-ventilating dry-type transformer is made of iron core 8, high-tension coil 4, low-voltage coil 11, upper clamping piece 1, lower clamping piece 5, coil supports 3, base 6 etc., and present embodiment is the transformer with three windings.

Low-voltage coil 11 usefulness NOMEX paper bag copper cash are on H class F insulation tube, layer insulation adopts NOMEX paper, and interlayer to have added the class of insulation be the I shape stay 12 of H level, the structure of I shape stay 12 as shown in Figure 7, its fit structure is shown in the cross-sectional view of Fig. 4.

High-tension coil 4 adopts NOMEX paper bag copper cash cake formula structure to be wound on the H class F insulation tube, adopt ceramic gasket 13 to support between cake, the structure of this pad as shown in Figure 5, ceramic gasket 13 barbed portion can be overlapped on the T type stay 14 that is bonded on the high pressure H class F insulation tube, the structure of T type stay 14 as shown in Figure 6, it installs fit structure shown in the cross-sectional view of Fig. 4.

Upper clamping piece 1 is two of symmetry, clamps iron core 8 by screw rod 2; Lower clamping piece 5 is welded on the base 6 after clamping iron core 8 by screw rod 2, low-voltage coil 11 concentric being enclosed within on the iron core stem 8, between the insulating cylinder of low-voltage coil 11 and the iron core by silicon as glue rod 17 stretchings, lift one's head upside at transformer body, be fixed on the upper clamping piece 1 with low tension insulator 7; High-tension coil 4 is enclosed within low-voltage coil 11 outsides, and 11 of high-tension coil 4 and low-voltage coils as glue rod 10 stretchings, are lifted one's head side on one's body device by the silicon in its axial air flue, are fixed on the upper clamping piece 1 with high-tension insulator 9, and its structure as shown in Figure 2; High-tension coil 4, low-voltage coil 11 press nail 15 fixing with the supporting construction 3 on the upper clamping piece 1 by elasticity, the structure of elasticity pressure nail 15 as shown in Figure 3, elasticity is pressed the effectively damping of spring 16 on the nail 15, keeps combining closely of high and

low pressure coil

4,11 and upper clamping piece.

Claims

1, a kind of open-ventilating formula fire retardant papers dipping lacquer dry-type transformer, comprise iron core, the low-voltage coil concentric locking collar is on the iron core stem stem, high-tension coil is enclosed within the low-voltage coil outside, leave axial air flue between the high and low pressure coil, upper and lower folder is by clamping iron core, high-voltage coil and low-voltage coil is fixed by the strutting piece on the upper and lower folder, be provided with the silicon rubber pad between high and low pressure coil and the strutting piece, it is characterized in that: by silicon rubber rod stretching, pass through the silicon rubber rod stretching in the axial air flue between low-voltage coil and the high-tension coil between described low-voltage coil and the iron core stem stem.

2, transformer according to claim 1 is characterized in that: low-voltage coil be with Copper Foil or paper bag copper cash on insulating cylinder, support between coil layer and insulating cylinder and be provided with the insulation support bar.

3, transformer according to claim 2 is characterized in that: described insulation support bar is the I shape support bar.

4, transformer according to claim 1 is characterized in that: high-tension coil is to be wound on the insulating cylinder with paper bag copper cash cake formula structure, supports being provided with the insulation support bar between coil layer and insulating cylinder.

5, transformer according to claim 3 is characterized in that: described insulation support bar is a ceramic gasket, and insulating cylinder is provided with T type stay, and ceramic gasket and T type stay are adhesively fixed together.

6, transformer according to claim 1 is characterized in that: described high and low pressure coil is to press the nail and the strutting piece of upper and lower folder to be fixed together by elasticity.