CN206134457U - Dry -type transformer is put in low office of anti corona - Google Patents

Abstract

The utility model discloses a dry -type transformer is put in low office of anti corona, establish the winding on the iron core including unshakable in one's determination and cover, the winding both ends set up the iron yoke cushion block of end insulating layer and fixed winding, and the winding includes interior winding and outer winding, casting body internal and external surface and the terminal surface from top to bottom anti corona insulating material that has all coated is watered to outer winding casting in casting body is watered to a ring -type, be provided with main empty the way between interior winding and the outer winding, outer winding inboard is provided with half conductor insulating layers, outer winding sets up to fall to surround for the pagoda formula and falls the layer structure. The pagoda formula of outer winding falls that the layer structure falls in the circle, the coating has watering casting body and setting up at outer winding half inboard conductor insulating layers of anti corona insulating material, evenly improves tip field distribution, improved the winding resistant corona ability, reduce the partial discharge volume, the assurance transformer can be in all kinds of filthy environment safe and reliable's operation, reduce the quantity of transformer electromagnetic wire, resin, improve performance price ratio of product and competitiveness.

Description

Dry-type transformer is put in a kind of low office of anti-corona

Technical field

This utility model is related to field transformer, the dry-type transformer that the low office of more particularly to a kind of anti-corona puts.

Background technology

Currently, many local PM2.5 and environmental pollution are severeer, in filthy more environment, common dry-type distribution Situations such as transformator is susceptible to corona discharge, creeping discharge and product shelf depreciation；Except because electric discharge produces ozone and makes an uproar The environmental pollutions such as sound are outer, can also puncture the equipment and property safety burnt transformator, threaten people, therefore, do not have reinforced process Traditional product leave larger potential faults.

, there is following point in the dry-type distribution transformer product of traditional method manufacture：

First, it is no effective to the winding weak link and local defect of transformator with commonsense method technique coiling Prevent and reinforcement.

Second, conventionally manufactured and technique, winding upper and lower end parts Electric Field Distribution is uneven to produce distortion.It is susceptible to Analysis of End Electric Field Concentrate, winding inside produces shelf depreciation；Affect use safety and the life-span of transformator.

3rd, further reliable safeguard procedures are not taken winding casting matrix end, in filthy wet environment, produce Corona and creeping discharge and electric discharge noise, even puncture and burn.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of low office of anti-corona is allowed to dry formula transformation Device.

For achieving the above object, this utility model is adopted the following technical scheme that：A kind of low office of anti-corona is allowed to dry formula transformation Device, including winding that is unshakable in one's determination and being set on iron core, winding two ends arrange the iron yoke cushion block of end insulating barrier and fixed winding, around Group includes interior winding and outer winding；It is internal that the outer winding casts in ring-type casting；Set between the interior winding and outer winding It is equipped with main empty path；The outer winding inner side is provided with semi-conductive insulating layer；The outer winding is set to pagoda type drop circle drop layer knot Structure.

It is expanded on further scheme, the pagoda type drop circle drop Rotating fields of the outer winding are by m cross-talks of coiling successively vertically Winding is constituted, and the m cross-talks winding is both provided with n-layer coil per individual sub- winding, the 2nd layer line circle per individual sub- winding to n-th The coil turn of layer line circle successively decreases successively；The coil of the 1st layer line circle of the 1st cross-talk winding and the 1st layer line circle of m cross-talk windings The number of turn is all 0 circle.

Scheme is expanded on further, the coil turn of the 2nd layer line circle of each sub- winding is t circles, the line of n-th layer coil The circle number of turn is t-a (n-2) circle, and wherein a is constant, the 2nd cross-talk winding to m-1 cross-talk windings per individual sub- winding The coil turn of the 1st layer line circle is all t-x circles, and wherein x is constant.

Scheme is expanded on further, the 1st layer line circle per individual sub- winding of the 1st cross-talk winding to m cross-talk windings is all It is wound on semi-conductive insulating layer outside；At the 1st layer of the position of the 1st layer line circle of the 1st cross-talk winding and m cross-talk windings The position of coil is provided with semiconducting insulation ring.

Scheme is expanded on further, described each casting matrix surfaces externally and internally upper and lower end parts are coated with anti-corona material.

Scheme is expanded on further, the iron core is silicon steel plate core or amorphous alloy core.

This utility model beneficial effect is：The pagoda type drop circle of outer winding drops Rotating fields, is coated with anti-corona insulation material Semi-conductive insulating layer of the casting matrix and setting of material on the inside of outer winding, uniformly improves Analysis of End Electric Field distribution, improves winding Inverter fed motor ability, reduce partial discharge quantity, it is ensured that the operation that transformator can be safe and reliable in all kinds of filthy environments；Simultaneously can The distance of main empty path and the radial size of winding are reduced, the distance between winding and upper and lower iron yoke is reduced, transformator electromagnetism is reduced The consumption of line, iron core, resin and steel, can averagely reduce the material cost of 3-9%, improve product cost and competitiveness.

Description of the drawings

Fig. 1 is this utility model winding construction schematic diagram.

Fig. 2 is the outer winding drop layer drop circle coiling schematic diagram of this utility model（N represents an outer winding wherein cross-talk winding in figure The number of plies, m represents outer winding hop count）.

Fig. 3 is the outer winding wherein cross-talk winding technique schematic diagram of this utility model（1-n represents outer winding wherein in figure The number of plies of cross-talk winding）.

Fig. 4 is this utility model casting matrix section structure schematic diagram.

Fig. 5 is casting matrix end view.

Fig. 6 is this utility model integral installation distribution structure schematic diagram.

Drawing reference numeral explanation：1st, it is unshakable in one's determination；21st, upper yoke；22nd, lower yoke；3rd, interior winding；4th, outer winding；41st, the 1st cross-talk Winding；42nd, middle cross-talk winding；43rd, section insulation layer；44th, m cross-talks winding；5th, main empty path；6th, insulating barrier is held；7th, partly lead Body insulating barrier；8th, air flue；9th, casting matrix.

Specific embodiment

Below in conjunction with the accompanying drawings 1 to accompanying drawing 6 introduces a kind of specific embodiment of the present utility model.

As shown in figures 1 to 6, the dry-type transformer that a kind of low office of anti-corona puts, including the iron core 1 and set of stalloy material The winding being located on unshakable in one's determination 1, winding two ends arrange the iron yoke cushion block of end insulating barrier 6 and fixed winding, and iron yoke cushion block is divided into ferrum Yoke 21 and lower yoke 22, winding includes interior winding 3 and outer winding 4；Iron yoke cushion block, outer winding 4 are provided between winding and iron yoke Into the casting matrix 9 of rigid structure, casting matrix 9 is externally coated with anti-corona insulant to Jing vacuum castings after coiling, interior winding 3 with Main empty path 5 is provided between outer winding 4, the innermost layer of outer winding 4 for being coated on casting matrix 9 is placed with semi-conductive insulating layer 7, partly leads Body insulating barrier 7 is formed by coated insulation material on the semiconductor, and the quasiconductor is used for shielding and uniform electric field, outer winding 4 Pagoda type drop circle drop Rotating fields are pagoda type first and last section drop circle drop layer winding construction.The air flue 8 of radiating is set in outer winding 4.

As shown in Fig. 2 the pagoda type drop circle of outer winding 4 drops Rotating fields by vertically successively the m cross-talk windings of coiling are constituted, Section insulation layer 43 is provided with per between individual sub- winding（As shown in Figure 4）, m cross-talk windings per individual sub- winding are both provided with n-layer Coil, successively decreases successively per the 2nd layer line circle of individual sub- winding to the coil turn of n-th layer coil；1st cross-talk winding 41（First section）'s 1st layer line circle and m cross-talks winding 44（Latter end）The 1st layer line circle coil turn all be 0 circle, in the 1st cross-talk winding 41 The position of the position of the 1st layer line circle and the 1st layer line circle of m cross-talks winding 44 is provided with open type semiconducting insulation ring.1st Cross-talk winding 41 to the 1st layer line circle per individual sub- winding of m cross-talks winding 44 is all wound on the outside of semi-conductive insulating layer 7.1st Cross-talk winding 41 is arranged in outer winding 4 near one end of lower yoke 22, and m cross-talks winding 44 arranges the ferrum on outer winding 4 is close One end of yoke 21.

As shown in Fig. 2 the coil turn of the 2nd layer line circle per individual sub- winding is t circles, the coil turn of n-th layer coil is T-a (n-2) circle, wherein a is constant, and the 2nd cross-talk winding is to m-2 middle cross-talk winding 42 between m-1 cross-talk windings The 1st layer line circle per individual sub- winding coil turn all be t-x circles, wherein x be constant.

As Fig. 4 with as shown in figure 5, the surfaces externally and internally of casting matrix 9 and upper and lower end parts are coated with anti-corona insulant.

This utility model improves the corona resistance of itself, reduces partial discharge quantity, it is ensured that transformator can be in all kinds of filths Safe and reliable operation in environment, and reduce the distance of main empty path 5 and the radial size of winding, reduce winding with it is upper and lower Iron yoke（21、22）Between distance, reduce electromagnetic wire of transformer, unshakable in one's determination 1, the consumption of resin and steel, so as to reduce 3-9% Material cost, improve product cost and competitiveness.

The above is not imposed any restrictions to technical scope of the present utility model, all according to this utility model technology reality Matter, any modification, equivalent variations and modification that the embodiment to more than is made, still falls within the technical solution of the utility model In the range of.

Claims (6)

1. dry-type transformer is put in a kind of low office of anti-corona, it is characterised in that：Including winding that is unshakable in one's determination and being set on iron core, around Group two ends arrange the iron yoke cushion block of end insulating barrier and fixed winding, and winding includes interior winding and outer winding；The outer winding casting It is internal in ring-type casting；Main empty path is provided between the interior winding and outer winding；The outer winding inner side is provided with partly leads Body insulating barrier；The outer winding is set to pagoda type drop circle drop Rotating fields.

2. dry-type transformer is put in a kind of low office of anti-corona according to claim 1, it is characterised in that：The treasured of the outer winding Tower drop circle drops Rotating fields by vertically successively the m cross-talk windings of coiling are constituted, and the m cross-talks winding all sets per individual sub- winding N-layer coil is equipped with, is successively decreased successively to the coil turn of n-th layer coil per the 2nd layer line circle of individual sub- winding；1st cross-talk winding The coil turn of the 1st layer line circle of the 1st layer line circle and m cross-talk windings is all 0 circle.

3. dry-type transformer is put in a kind of low office of anti-corona according to claim 2, it is characterised in that：Each described sub- winding The coil turn of the 2nd layer line circle be t circles, the coil turn of n-th layer coil is t-a (n-2) circle, and wherein a is constant, described The coil turn of the 2nd cross-talk winding to the 1st layer line circle per individual sub- winding of m-1 cross-talk windings is all t-x circles, and wherein x is Constant.

4. dry-type transformer is put in a kind of low office of anti-corona according to claim 3, it is characterised in that：1st cross-talk around Group to the 1st layer line circle per individual sub- winding of m cross-talk windings is all wound on semi-conductive insulating layer outside；In the 1st cross-talk The position of the 1st layer line circle of the position and m cross-talk windings of the 1st layer line circle of winding is provided with semiconducting insulation ring.

5. dry-type transformer is put in a kind of low office of anti-corona according to claim 1, it is characterised in that：Described each casting matrix Surfaces externally and internally upper and lower end parts are coated with anti-corona material.

6. dry-type transformer is put in a kind of low office of anti-corona according to claim 1, it is characterised in that：It is described unshakable in one's determination for silicon steel Piece iron core or amorphous alloy core.