CN211507337U

CN211507337U - 35kV metallic glass transformer ware body structure

Info

Publication number: CN211507337U
Application number: CN201922133627.5U
Authority: CN
Inventors: 关银环; 薛建平; 周亮
Original assignee: Wujiang Transformer Co Ltd
Current assignee: Wujiang Transformer Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-09-15
Anticipated expiration: 2029-12-03

Abstract

The utility model belongs to the technical field of the power equipment technique and specifically relates to a 35kV metallic glass transformer ware body structure, metallic glass is unshakable in one's determination and is rolled up into rectangle frame monomer by amorphous strip material, forms four closed magnetic circuits of frame of three-phase after the combination, including last indisputable yoke, stem apex, lower indisputable yoke. The high-low voltage winding is arranged outside the core column, a U-shaped partition plate is arranged between the end part of the high-low voltage winding and the upper iron yoke and the lower iron yoke, a stay is bonded on the lower part of the U-shaped partition plate to form an oil gap of the stay at the end part of the high-low voltage winding, the high-low voltage winding is of a rectangular structure corresponding to the section of the amorphous alloy iron core, the low-voltage winding is a foil winding, the high-voltage winding is a layer winding and is divided into an upper section and a lower section, and the upper section.

Description

35kV metallic glass transformer ware body structure

Technical Field

The utility model belongs to the technical field of the power equipment technique and specifically relates to a 35kV metallic glass transformer ware body structure.

Background

In recent years, with the continuous deepening of national energy saving and consumption reduction policies, amorphous alloy distribution transformers are greatly popularized due to low no-load loss, and are widely applied to power distribution networks. However, since the amorphous strip is sensitive to mechanical stress, the basic principle of structural design and body assembly is that the core is suspended on the winding, and stress on the core or local stress concentration should be avoided to the maximum extent to reduce no-load loss and noise of the transformer. The 10kV distribution transformer winding and the transformer body have relatively simple structures, and the performance of the iron core is easier to ensure, so that the amorphous alloy transformer is mostly used in a 10kV power distribution system.

The high-voltage-level transformer body has a complex structure, and the dimensional matching precision of all related components, the assembly process dispersibility of the body and the like are main reasons for stress of the amorphous iron core, so that no-load loss and noise of the transformer are influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a 35kV metallic glass transformer ware body structure can avoid the atress unshakable in one's determination or local stress concentration appears to the limit ground greatly, reduces transformer no-load loss and noise.

The utility model discloses a specific technical scheme as follows:

a35 kV amorphous alloy transformer body structure is characterized in that an amorphous alloy iron core is formed by winding amorphous strips into rectangular frame-type monomers, and a three-phase four-frame closed magnetic circuit is formed after the amorphous alloy iron core is combined with the rectangular frame-type monomers and comprises an upper iron yoke, a core column and a lower iron yoke. The high-low voltage winding is arranged outside the core column, a U-shaped partition plate is arranged between the end part of the high-low voltage winding and the upper iron yoke and between the end part of the high-low voltage winding and the lower iron yoke, and 4.0 supporting bars are bonded on the lower part of the U-shaped partition plate to form an oil gap of the supporting bars at the end part of the high-low voltage winding.

In the technical scheme, the 35kV station transformer is designed by adopting the amorphous alloy iron core, and the amorphous strip is sensitive to mechanical stress, so that the stress on the iron core is reduced or avoided while the electrical performance of the transformer is met by the structure of the transformer body. A U-shaped partition plate is arranged between the end part of the high-low voltage winding and the iron yoke, the U-shaped partition plate is formed by bending 6mm laminated paper boards, and 4.0 stays are bonded at the lower part of the U-shaped partition plate to form an oil gap at the end part of the winding. The U-shaped partition plate has certain strength, so that the contact surface between the iron core and the winding is smooth, and the stress concentration of the iron yoke suspension surface on the iron core after the transformer body is erected is avoided.

The utility model discloses a further improvement, U-shaped baffle adopt 6mm laminated paper board to buckle and form, and high-low voltage winding is the rectangle structure corresponding with the amorphous alloy iron core cross-section, and low voltage winding is foil formula winding, and high voltage winding is laminar winding to divide upper and lower two sections, separate with the insulating end ring of rectangle between upper and lower two sections of high voltage winding.

The high-low voltage winding structure is a rectangular structure corresponding to the section of an amorphous alloy iron core, the low-voltage winding is a foil winding, the high-voltage winding is a layer winding and is divided into an upper section and a lower section, the two sections are separated by a rectangular insulating end ring, the insulating end ring is composed of a paper ring and an oil gap cushion block, the three-phase winding is flatly placed on an assembly table when the transformer body is assembled, the stress surface is the outer diameter surface of the winding in the long axis direction, the outer diameter of the insulating end ring in the long axis direction is 0-2mm smaller than that of the winding, the phenomenon that the end ring protrudes outwards to cause unstable placement of the winding is avoided, assembly errors occur, and the final performance is affected by.

The utility model has the advantages that: the utility model fully considers the particularity of the amorphous strip material in the structural design, avoids the stress of the iron core to the utmost extent through the structural improvement, and ensures the final performance of the transformer; the amorphous alloy transformer is popularized and applied to a 35kV station transformer, energy is saved, consumption is reduced, and economic benefits are obvious.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the structure of the middle and high voltage winding of the present invention.

Fig. 3 is a schematic sectional view of a portion a-a in fig. 2.

In the figure, 1-upper iron yoke, 2-lower iron yoke, 3-U-shaped clapboard, 4-iron core suspension plane, 5-stay oil gap, 6-high-low voltage winding, 7-low voltage winding, 8-high voltage winding and 9-insulating end ring.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.

Example (b): as shown in fig. 1, 2 and 3, a 35kV amorphous alloy transformer body structure comprises an amorphous alloy iron core, wherein the amorphous alloy iron core comprises a core column and an iron yoke, the iron yoke is divided into an upper iron yoke 1 and a lower iron yoke 2 which are respectively set as an upper iron yoke 1 and a lower iron yoke 2, the upper iron yoke 1 and the lower iron yoke 2, and the upper iron yoke, the lower iron yoke and the core column form a closed magnetic circuit. The amorphous alloy iron cores are connected to form a closed magnetic circuit, a high-low voltage winding 6 is arranged outside the amorphous alloy iron core, a U-shaped partition plate is arranged between the end part of the high-low voltage winding 6 and the upper iron yoke 1 and the lower iron yoke 2, the U-shaped partition plate 3 is formed by bending 6mm laminated paper boards, and 4.0 stays are bonded to the lower part of the U-shaped partition plate to form an oil gap 5 of the stay at the end part of the high-low voltage winding 6; the high-low voltage winding 6 is of a rectangular structure corresponding to the section of an amorphous alloy iron core, the low-voltage winding 7 is of a foil winding, the high-voltage winding 8 is of a layer winding and is divided into an upper section and a lower section, the upper section and the lower section of the high-voltage winding 8 are separated by a rectangular insulating end ring 9, the insulating end ring 9 is composed of a paper ring and an oil gap cushion block, the three-phase winding is horizontally placed on an assembly table when the transformer body is assembled, the stress surface is the outer diameter surface of the long axis direction of the winding, the outer diameter of the insulating end ring 9 in the long axis direction is 0-2mm smaller than that of the winding, the phenomenon that the winding is placed unstably due to the fact that the end ring protrudes outwards is avoided.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The 35kV amorphous alloy transformer body structure is characterized in that an amorphous alloy iron core is formed by winding amorphous strips into rectangular frame-type single bodies, a three-phase four-frame closed magnetic circuit is formed after combination, the structure comprises an upper iron yoke, a core column and a lower iron yoke, a high-low voltage winding is arranged outside the core column, a U-shaped partition plate is placed between the end part of the high-low voltage winding and the upper iron yoke and between the end part of the high-low voltage winding and the lower iron yoke, and 4.0 supporting strips are bonded on the lower part of the U-shaped partition plate to form a supporting strip oil gap at the end part of the high-.

2. The 35kV amorphous alloy transformer body structure of claim 1, wherein the U-shaped partition is formed by bending 6mm laminated paper boards.

3. The 35kV amorphous alloy transformer body structure of claim 2, wherein the high-low voltage winding is a rectangular structure corresponding to the section of the amorphous alloy core, the low voltage winding is a foil winding, and the high voltage winding is a layer winding and is divided into an upper section and a lower section.

4. The 35kV amorphous alloy transformer body structure of claim 3, wherein the upper and lower sections of the high-voltage winding are separated by a rectangular insulating end ring.