CN201478053U

CN201478053U - Transformer with D-type iron yoke structure

Info

Publication number: CN201478053U
Application number: CN2009201692837U
Authority: CN
Inventors: 路明甫; 周波; 周丽
Original assignee: SICHUAN JINCHENGMING ELECTRIC CO Ltd
Current assignee: SICHUAN JINCHENGMING ELECTRIC CO Ltd
Priority date: 2009-08-21
Filing date: 2009-08-21
Publication date: 2010-05-19
Anticipated expiration: 2019-08-21

Abstract

The utility model discloses a transformer with a D-type iron yoke structure. The transformer comprises an upper iron yoke, a lower iron yoke, and an elliptical iron core column consisting of an A-phase iron core column, a B-phase iron core column and a C-phase iron core column, wherein the A-phase iron core column, the B-phase iron core column and the C-phase iron core column are all made into an elliptical column structure by stacking sheet materials with good magnetically conductive performance; the upper iron yoke and the lower iron yoke are prepared by stacking the sheet materials with good magnetically conductive performance; and both the upper iron yoke and the lower iron yoke have a D-type structure, which has an elliptical inner section and a rectangular outer section. The transformer with the D-type iron yoke structure can ensure enough support area on the end face of the windings so as to improve the electrical force distribution at the end of the windings, thereby enhancing the capability for resisting electrical power impact caused by sudden short circuit and improving the long-term operation safety factor of the transformer.

Description

D sections yoke structure transformer

Technical field

The utility model relates to power equipment manufacturing technology field, is specifically related to the transformer with D sections yoke structure that a kind of suitable 10kV-110kV electric pressure electrical network uses.

Background technology

The iron yoke structure of traditional transformer iron core is cylindrical, behind the stem stem suit, be assurance winding overhang mechanical strength, guarantee that transformer bears the ability of short-circuit electromotive force, must on iron yoke folder from top to bottom, weld the winding overhang support plate, make the clamp structure of iron core too complicated like this, the end portion supports effect is not good yet simultaneously, transformer upper and lower end parts fastening force deficiency, in service at transformer as sudden short circuit, cause transformer because of not enough damage of moment holding capacity easily, the operation stable to the transformer long-term safety brings certain influence.

The utility model content

Technical problem to be solved in the utility model is: how a kind of D sections yoke structure transformer is provided, this D sections yoke structure transformer can guarantee that the winding end face is had enough big Area of bearing, improving the winding overhang electric field force distributes, bear the ability that the sudden short circuit electric power is impacted thereby strengthen transformer, improve the coefficient of safety of transformer long-time running.

For achieving the above object, the technical scheme that the utility model adopted is: a kind of D sections yoke structure transformer is provided, comprises sealed transformer fuel tank, the oval winding of three-phase, winding insulation spare, oval iron core column, dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, transformer oil, conservator and pressure relief device; The oval winding of described three-phase, transformer oil, oval iron core column and winding insulation spare all are arranged in the sealed transformer fuel tank, and described dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, conservator and pressure relief device all are arranged on outside the sealed transformer fuel tank; It is characterized in that: described oval iron core column by upper yoke, lower yoke, A phase iron core column, B phase iron core column and C mutually iron core column form; Described A phase iron core column, B phase iron core column and C mutually iron core column by the folded ovallized column body structure of making of the good flaky material of magnetic property; Described upper yoke and lower yoke form by the folded system of the good flaky material of magnetic property, and the lateral section was the D type structure of rectangle for oval outer lateral section in upper yoke and lower yoke were; The all stepped distribution of a side that the first order core lamination stack of described upper yoke and lower yoke, second level core lamination stack, third level core lamination stack and fourth stage core lamination stack are inside, the sheet end of an outside side remains on the same straight line.

In sum, D sections yoke structure transformer provided by the utility model is compared with traditional power transformer and is had the following advantages:

1, effectively increases Transformer Winding end portion supports area, improve the winding overhang force-bearing situation, avoid winding discontinuity equalization phenomenon, effectively improve Transformer Winding and bear the electrodynamic ability of moment that sudden short circuit produces, loss percentage under effectively the reduction transformer is nonserviceabled, the safe and stable operation of assurance network system;

2, simplify transformer core holder structure, improve and manufacture efficient.Simultaneously, the holder structure of simplification is that work such as the inspection of transformer and maintenance bring great convenience.

Accompanying drawing and explanation thereof

Fig. 1 is the structure chart of D sections yoke structure transformer;

Fig. 2 is the whole closed assembly figure of the iron core of D sections yoke structure transformer;

Fig. 3 is along the sectional view of the D sections yoke of A-A line among Fig. 2;

Fig. 4 is along the sectional view of the iron core column of B-B line among Fig. 2.

Wherein, 1, upper yoke; 2, lower yoke; 3, A phase iron core column; 4, B phase iron core column; 5, C phase iron core column; 6, fourth stage core lamination stack; 7, first order core lamination stack; 8, second level core lamination stack; 9, third level core lamination stack.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

As shown in the figure, this D sections yoke structure transformer comprises sealed transformer fuel tank, the oval winding of three-phase, winding insulation spare, oval iron core column, dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, transformer oil, conservator and pressure relief device; The oval winding of described three-phase, transformer oil, oval iron core column and winding insulation spare all are arranged in the sealed transformer fuel tank, and described dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, conservator and pressure relief device all are arranged on outside the sealed transformer fuel tank; It is characterized in that: described oval iron core column by upper yoke 1, lower yoke 2, A phase iron core column 3, B phase iron core column 4 and C mutually iron core column 5 form; Described A phase iron core column 3, B phase iron core column 4 and C mutually iron core column 5 by the folded ovallized column body structure of making of the good flaky material of magnetic property; Described upper yoke 1 and lower yoke 2 form by the folded system of the good flaky material of magnetic property, and the lateral section was the D type structure of rectangle for oval outer lateral section in upper yoke 1 and lower yoke 2 were; The all stepped distribution of a side that the first order core lamination stack 7 of described upper yoke 1 and lower yoke 2, second level core lamination stack 8, third level core lamination stack 9 and fourth stage core lamination stack 6 are inside, the sheet end of an outside side remains on the same straight line.

The utility model is by equal with first order core lamination stack main with being evacuated on the second level core lamination stack of lower yoke on the iron core, third level core lamination stack, the fourth stage core lamination stack, whole like this core window upper and lower end face forms a plane, the whole lower yoke of going up forms D shape shape respectively, keep original iron yoke effective cross-section constant, magnetic circuit is constant, and iron core integral window height and window width remain unchanged.Like this, the fastening effect of good support is just in time played to the winding upper and lower end parts in formed core window upper and lower end face, having guaranteed has enough big Area of bearing to winding, bears the ability that the sudden short circuit electric power is impacted thereby strengthen transformer, has increased the coefficient of safety of transformer operation.Simultaneously, owing to iron core integral window height, window width, iron yoke cross section, stem stem cross section, magnetic circuit does not all change, and has guaranteed the reliable and stable of transformer performance.

Claims

1. a D sections yoke structure transformer comprises sealed transformer fuel tank, the oval winding of three-phase, winding insulation spare, oval iron core column, dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, transformer oil, conservator and pressure relief device; The oval winding of described three-phase, transformer oil, oval iron core column and winding insulation spare all are arranged in the sealed transformer fuel tank, and described dehydrating breather, gas relay protector, low-voltage wiring terminal, high-voltage connection terminal, signal thermometer, corrugate fin, conservator and pressure relief device all are arranged on outside the sealed transformer fuel tank; It is characterized in that: described oval iron core column by upper yoke (1), lower yoke (2), A phase iron core column (3), B phase iron core column (4) and C mutually iron core column (5) form; Described A phase iron core column (3), B phase iron core column (4) and C mutually iron core column (5) by the folded ovallized column body structure of making of the good flaky material of magnetic property; Described upper yoke (1) and lower yoke (2) form by the folded system of the good flaky material of magnetic property, and the lateral section was the D type structure of rectangle for oval outer lateral section in upper yoke (1) and lower yoke (2) were; The all stepped distribution of a side that the first order core lamination stack (7) of described upper yoke (1) and lower yoke (2), second level core lamination stack (8), third level core lamination stack (9) and fourth stage core lamination stack (6) are inside, the sheet end of an outside side remains on the same straight line.