CN2514471Y

CN2514471Y - Cake-type winding structure

Info

Publication number: CN2514471Y
Application number: CN 01272297
Authority: CN
Inventors: 周立杰; 孙传民; 高丹; 李侠
Original assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Current assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Priority date: 2001-12-21
Filing date: 2001-12-21
Publication date: 2002-10-02
Anticipated expiration: 2011-12-21

Abstract

The utility model relates to a pie winding structure which comprises wire pies formed by winding conducting wires, large oil channels, small oil channels, etc. The utility model is characterized in that the height of the two large oil channels among the three wire pies at the head end or the tail end is 4mm; the height of the small oil channels and the height of the large oil channels among other strengthening wire pies are respectively 2mm and 4mm, and the small oil channels and the large oil channels are alternately arranged; the height of the small oil channels among other normal wire pies is 2mm. The utility model belongs to the general part of a transformer, and is suitable for oil filled transformers with interleaved continuous type or inner screen continuous type 110kV stage pie windings. The utility model solves the technical problems of large impact gradient, easy breakdown, high material consumption of the transformers, high cost, large loss, etc. existing in the pie winding of the prior art.

Description

A kind of pie winding structure

Affiliated technical field

The utility model belongs to the general parts of transformer, is the structure of pie winding or coil, is applicable to the oil-filled transformer of being entangled with continous way or inner screen continuous pie winding, particularly the pie winding oil-filled transformer of 110kV level.

Background technology

At present, the pie winding that is used for oil-filled transformer adopts at the head end of winding or not hold the laterally big oil duct height between three line cakes be 4.5mm in order to cool off and to insulate more, and the oil duct between all the other line cakes generally highly be the little oil duct of 3mm and highly is that the big oil duct of 4.5mm replaces arrangement.Its weak point is: 1, because head end the or oil duct between the end line cake is not bigger, the electric capacity between the line cake is just less, and therefore, it is big to impact gradient, easily punctures; 2, again because the oil duct between each line cake is bigger, the window size unshakable in one's determination of transformer is increased, consumptions such as permeability magnetic material, electric conducting material, insulating material are more, so the material usage of transformer is more, cost is higher; 3, because of the permeability magnetic material large usage quantity, lead is longer, and therefore, the no-load loss of transformer and load loss and supplementary load loss are all bigger.

Summary of the invention

For the impact gradient in the pie winding structure that solves prior art big, deficiencies such as many to the transformer material consumption, that cost is high, loss is bigger, a kind of pie winding structure that the utility model provides, it not only impacts, and gradient is little, difficult to be punctured, and makes transformer save material, reduce cost and loss.

The technical scheme that its technical problem that solves the utility model adopts is: it comprises the line cake of lead coiling, big oil duct and little oil duct etc., its special character is: two big oil duct height between three line cakes of head end or end are 4mm, little oil duct height between all the other line feeder cakes is that 2mm and big oil duct height are that 4mm is arranged alternately, and the little oil duct height between other normal line cake is 2mm.

Owing to the horizontal oil duct greatly between head end of the present utility model and line feeder cake reduces than prior art, electric capacity increases between the line cake, therefore impacts little, the difficult puncture of gradient, reliability raising; Again owing to the horizontal large and small oil duct between the utility model line cake all reduces than prior art, thereby reduced the winding height, reduced the transformer core window height, saved permeability magnetic material and electric conducting material etc., therefore, make transformer save material, reduced cost; Because of the minimizing of conductor length and permeability magnetic material etc., cause the load loss, supplementary load loss etc. of no-load loss unshakable in one's determination, winding all to decrease, therefore, make transformer loss little.

The beneficial effects of the utility model are: impact little, the difficult puncture of gradient, make transformer save material, reduce cost and loss.

Description of drawings

Accompanying drawing is the utility model example structure schematic diagram.

Among the figure, A is the line cake, 1,2,3,4,5,6,7,8,9,10,11 ... n-2, n-1, n are that the line cake is arranged number, and b is big oil duct, b ₁It is little oil duct.

Embodiment

With reference to accompanying drawing.What accompanying drawing provided is the semi-insulated pie winding example structure of the utility model schematic diagram.The utility model is by the line cake (A) of lead coiling and big oil duct (b) between line cake (A) and little oil duct formations such as (b1).Wherein, between 1,2,3 three line cakes of head end (A) and do not hold big oil duct (b) between n, n-1, three line cakes of n-2 (A) highly for 4mm; Little oil duct (b1) between all the other 4,5,6,7,8,9,10,11 line feeder cakes (A) highly highly is arranged alternately for 4mm with big oil duct (b) for 2mm; N-13 between all the other n-14 normal line cakes (A) little oil duct height is 2mm.If the big oil duct (b) and the little oil duct (b of the head end of the not end of the pie winding of all insulation and present embodiment ₁) correspondingly be provided with and get final product.

Claims

1, a kind of pie winding structure, comprise the line cake of lead coiling, big oil duct and little oil duct etc., it is characterized in that: head end or not the end three line cakes between two big oil duct height be 4mm, little oil duct height between all the other line feeder cakes is that 2mm and big oil duct height are that 4mm is arranged alternately, and the little oil duct height between other normal line cake is 2mm.