CN205645493U

CN205645493U - Distribution transformer

Info

Publication number: CN205645493U
Application number: CN201620432423.5U
Authority: CN
Inventors: 王桂兵; 纪宏锋; 贺兆军; 王继武; 姜文豹
Original assignee: Liaoning Is When Triumphant Utilities Electric Co Ltd
Current assignee: Liaoning Is When Triumphant Utilities Electric Co Ltd
Priority date: 2016-05-14
Filing date: 2016-05-14
Publication date: 2016-10-12
Anticipated expiration: 2026-05-14

Abstract

The utility model discloses an application scope capacity is 30~1600KVA's distribution transformer, including iron core and height, the low voltage coil of suit on the iron core, the low pressure head end is drawn in low voltage coil, and its tail end is drawn outside low voltage coil, and the iron core is outside, and wind the periphery and be high -pressure oil duct between the layer around there being low voltage coil, and around there be high -pressure coil, take outward by the outmost coiling of high -pressure coil deflation for the oil duct, and coil side separator is put to every layer of high -pressure coil cloth, the coil suit of coiling is on the iron core, and D sections yoke cartridge is on the iron core. For reduce cost, the iron core is changed into the elliptic type and is adopted D sections yoke by multistage circular, this project organization reduces the product volume when the no -load loss who guarantees the transformer, reduce the cost of manufacture, transformer operation temperature rise can be reduced, the overload capacity of transformer is improved, reduce transformer no -load reactive power, reduce the line loss, increase the load bearing capability of circuit, for energy -concerving and environment -protective type product.

Description

Distribution transformer

Technical field

It is the distribution transformer of 30～1600KVA that this utility model relates to the design of transformer in power industry equipment, particularly scope of application capacity.

Background technology

Existing transformer core uses multi-stage circular structure, in distribution transformer designs, in order to reduce cost, is generally changed transformer core into ellipse by multi-stage circular, reduces window width, to reduce iron core weight；This way is to capacity at 315KVA and above transformator, and cost reduces more obvious, but to capacity at the transformator of below 315KVA, cost reduces the most notable；This type distribution transformer existing uses ordinary silicon steel disc, and iron-loss per unit weight is big, and for guarantee transformer noload losses it is necessary to choose relatively low magnetic density, iron core and wire weight and can increase, volume of transformer increases, and the cost of such transformator will increase.

Summary of the invention

This utility model purpose is to solve the defect that prior art exists, it is provided that one had both improved transformer overload ability, can reduce again product cost, and its scope of application capacity is the distribution transformer of 30～1600KVA.

The technical scheme that this utility model provides for achieving the above object is: a kind of distribution transformer, the high-tension coil including iron core and being sleeved on iron core and low-voltage coil, low pressure head end is drawn in low-voltage coil, low pressure tail end is drawn outside low-voltage coil, it is wound with low-voltage coil outside iron core, between the outer surrounding layer of low-voltage coil, high-pressure oil duct is set, outside high-pressure oil duct, is wound with high-tension coil, it is characterized in that: described high-tension coil outermost layer coiling tightening belt, every layer of high-tension coil lays layer insulation；The mounting coil of coiling is on iron core, and iron yoke is inserted on iron core, and described iron yoke uses D type yoke.

Described iron core is oval.

Described layer insulation uses pressure cable paper, and described tightening belt at least places one layer.

Accompanying drawing explanation

Fig. 1 is this utility model contour structures schematic diagram.

Fig. 2 is high and low pressure coil top view.

Fig. 3 is structural representation after mounting coil.

Fig. 4 be in Fig. 3 A-A to iron yoke section structure schematic diagram.

In figure: 1 low-voltage coil；2 high-tension coils；3 layer insulations；4 iron cores；5 iron yokes；6 high-pressure oil ducts；7 tightening belts；8 coils.

For reducing cost of manufacture in this utility model design, transformer core is changed into ellipse by multi-stage circular, and iron yoke uses D type yoke, reduces window width, reduces again iron core weight, when ensureing the open circuit loss of transformator, reduce volume of transformer, make cost reduce；Stalloy uses the 23ZH090 section bar that iron-loss per unit weight is little, makes distribution transformer open circuit loss be greatly reduced, selects this material magnetization volume less than ordinary silicon steel disc, reduce no-load transformer reactive power, can reduce line loss, increases circuit load capacity.This distribution transformer is the novel product of energy-conserving and environment-protective low cost, and indices all meets national standard.

Detailed description of the invention

Seeing Fig. 1～3, the distribution transformer that scope of application capacity is 30～1600KVA designed by this utility model, this transformator is mainly made up of iron core 4 and the high-tension coil 2 and the low-voltage coil 1 that are sleeved on iron core.Low pressure head end is drawn in low-voltage coil 1, and low pressure tail end is in the outer extraction of low-voltage coil 1, and iron core 4 is outside is wound with low-voltage coil 1, arranges high-pressure oil duct 6 between the outer surrounding layer of low-voltage coil, and high-pressure oil duct 6 is outside is wound with high-tension coil 2.High-tension coil 2 outermost layer coiling tightening belt 7, every layer of high-tension coil lays layer insulation 3；The coil 8 of coiling is sleeved on iron core 4, and iron yoke 5 is inserted on iron core 4, and iron yoke 5 uses D type yoke (see figure 4).

Coiling of the present utility model: first coiling low-voltage coil 1, after coiling completes, place main oil gallery 6, further around high-tension coil 2 processed, high-tension coil 2 outermost layer coiling tightening belt 7, every layer of high-tension coil all lays layer insulation 3, layer insulation 3 uses pressure cable paper, i.e. every layer high-tension coil 2 places 0.075NW insulating paper 2 (every pressure 2KV of 0.075NW insulating paper, to 10KV transformator laminar winding, every layer of use 2 i.e. can), so in transformator temperature rise calculates, layer insulation is corrected temperature rise and just can be ignored, transformator can be reduced and run temperature rise, on the basis of ensureing that transformer safety is run, not only improve the overload capacity of transformator, also reduce the cost of transformator.High-tension coil outermost layer coiling tightening belt 7, tightening belt 7 places one layer, is partly stacked as one layer；After coil 8 coiling is complete, it is sleeved on iron core 4, then plugs iron yoke 5.

In distribution transformer designs, for reducing cost, transformer core 4 is changed into ellipse by multi-stage circular, and iron yoke uses D type yoke, reduces window width, reduces again iron core weight, when ensureing the open circuit loss of transformator, reduce volume of transformer, reduce cost of manufacture；Stalloy uses the 23ZH090 section bar that iron-loss per unit weight is little, makes distribution transformer open circuit loss be greatly reduced, selects this material magnetization volume less than ordinary silicon steel disc, reduce no-load transformer reactive power, can reduce line loss, increases circuit load capacity.This distribution transformer is the novel product of energy-conserving and environment-protective low cost, and indices all meets national standard.

Claims

1. a distribution transformer, the high-tension coil including iron core and being sleeved on iron core and low-voltage coil, low pressure head end is drawn in low-voltage coil (1), low pressure tail end is drawn outside low-voltage coil, iron core (4) is outside is wound with low-voltage coil (1), arranges high-pressure oil duct (6), be wound with high-tension coil (2) outside high-pressure oil duct between the outer surrounding layer of low-voltage coil, it is characterized in that: described high-tension coil outermost layer coiling tightening belt (7), every layer of high-tension coil lays layer insulation (3)；The coil (8) of coiling is sleeved on iron core (4), and iron yoke (5) is inserted on iron core, and described iron yoke (5) uses D type yoke.

2. according to the distribution transformer described in claim 1, it is characterized in that: described iron core (4) is ellipse.

3. according to the distribution transformer described in claim 1, it is characterized in that: described layer insulation (3) uses pressure cable paper, described tightening belt (7) at least to place one layer.