A rectangular iron yoke assembly for a three-column iron core of a transformer

Abstract

The invention discloses a rectangular iron yoke assembly of a three-column iron core of a transformer, comprising a rectangular iron yoke composed of a plurality of silicon steel laminations stacked in a horizontal X direction, and side clamps and an upper clamp arranged on both sides and the top of the iron yoke, the middle part of the iron yoke is a main-level sheet composed of a complete silicon steel lamination, and a plurality of silicon steel laminations on both sides of the main-level sheet in the X direction are secondary sheets, the height of the silicon steel lamination closest to the main-level sheet is the same as that of the main-level sheet, and the height of each silicon steel lamination in the remaining secondary sheets gradually decreases in the direction away from the main-level sheet. The invention has the advantages of compact product structure, simple appearance, significant material saving, and excellent clamping ability.

Description

Technical Field

[0001] The invention relates to the field of transformer iron yoke structures, in particular to a rectangular iron yoke component of a transformer three-column iron core. Background Art

[0002] At present, there are many structures of power transformer cores, most of which adopt three-phase three-column circular yoke, D-shaped yoke and three-phase five-column structure. The core of the power transformer is composed of a yoke and a core column, where the core column is used to wind the coil, and the yoke and the core column are both made of multiple silicon steel sheets stacked. In order to ensure that the cross-section of the yoke and the core column matches, the existing power transformer core has the problem of a large amount of silicon steel sheets in the yoke part and a high overall height. Summary of the invention

[0003] The purpose of the present invention is to provide a rectangular yoke assembly for a three-column transformer core, so as to solve the problem that the yoke portion of the transformer core in the prior art uses a large amount of silicon steel sheets and occupies a large space.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A rectangular iron yoke assembly for a three-column iron core of a transformer, characterized in that it includes a rectangular iron yoke composed of multiple silicon steel laminations stacked along the horizontal X direction, and side clamps arranged on both sides of the iron yoke in the X direction, and an upper clamping plate arranged above the iron yoke in the Z direction, the middle part of the iron yoke is a main-stage sheet composed of a complete silicon steel lamination, and multiple silicon steel laminations on both sides of the main-stage sheet in the X direction are secondary sheets respectively, at least one silicon steel lamination closest to the main-stage sheet in the secondary sheets on each side has the same Z-direction height as the main-stage sheet, and the Z-direction heights of the silicon steel laminations in the remaining secondary sheets gradually decrease in the X direction away from the main-stage sheet, and the X-direction center lines of all the silicon steel laminations are located on the same straight line.

[0006] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that the total width of each silicon steel lamination in the iron yoke in the X direction is equal to the width of the core column in the iron core in the X direction.

[0007] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that the Z-direction height of each secondary sheet in the iron yoke suddenly decreases, thereby forming a step portion between the Z-upper and lower sides of adjacent secondary sheets.

[0008] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that the Z-direction height of each secondary sheet in the iron yoke gradually decreases, thereby forming a smooth curve portion between the Z-upper and lower sides of adjacent secondary sheets.

[0009] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that: the Z-upper end of each side clamp plate is connected to the corresponding side of the upper clamp plate by bolts, and a first connecting seat is fixed to a side of each side clamp plate facing away from the iron yoke near the Z-upper end, and each first connecting seat is screwed through with a first bolt connecting head, one end of the first bolt connecting head passes through the side clamp plate on the corresponding side and extends into the space surrounded by the side clamp plate and the upper clamp plate, and a first pull strap is connected between the inserted ends of the first bolt connecting head, the first pull strap passes over the Z-top of the iron yoke and is clamped between the iron yoke and the upper clamp plate, and the other end of each first bolt connecting head is screwed and locked to the corresponding first connecting seat by a nut.

[0010] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that: a second connecting seat is fixed to a side of each side clamp plate facing away from the iron yoke near the lower end position in the Z direction, and a second bolt connecting head is screwed through each second connecting seat, and one end of the second bolt connecting heads on both sides is opposite to each other and a second pull belt is connected therebetween, and the second pull belt passes over and is tightly attached to the Z-direction bottom of the iron yoke, and the other end of each second bolt connecting head is screwed and locked to the corresponding second connecting seat by a nut.

[0011] The rectangular iron yoke assembly of the three-column iron core of the transformer is characterized in that an insulating sheet is fixed to the side of each side clamp facing the iron yoke and abutting the corresponding side of the iron yoke, and an ear plate is fixed to the side of each side clamp facing away from the iron yoke.

[0012] In the present invention, the rectangular iron yoke is composed of a primary sheet and a plurality of secondary sheets, wherein the height of some secondary sheets adjacent to the primary sheet is the same as the height of the primary sheet, and the height of the remaining secondary sheets is gradually reduced relative to the height of the primary sheet. Through the above structure, while ensuring that the cross-sectional area is the same as the cross-sectional area of ​​the core column, the height of the primary sheet can be reduced, the amount of silicon steel laminations is reduced, and the overall height of the transformer is reduced. The amount of steel and transformer oil is also reduced, thereby achieving the purpose of reducing costs and increasing efficiency.

[0013] In the present invention, the iron yoke is clamped and fixed between the upper clamping plate and the side clamping plates, and the iron yoke is fastened by a drawstring, which has the advantage of good clamping ability.

[0014] The present invention is a rectangular iron yoke structure for a three-column iron core, which has the advantages of compact structure, simple appearance, significant material saving and excellent clamping ability. The product structure is suitable for various types of power transformers and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a Y-direction view of the structure of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, a rectangular iron yoke assembly of a three-column iron core of a transformer comprises a rectangular iron yoke 1 composed of a plurality of silicon steel laminations stacked in a horizontal X direction, side clamping plates 2 arranged on both sides of the iron yoke 1 in the X direction, and an upper clamping plate 3 arranged on the upper side of the iron yoke 1 in the Z direction, the middle part of the iron yoke 1 is a main sheet 1.1 composed of a complete silicon steel lamination, and a plurality of silicon steel laminations on both sides of the main sheet 1.1 in the X direction are secondary sheets 1.2 respectively, at least one silicon steel lamination closest to the main sheet in each secondary sheet 1.2 has the same Z-direction height as the main sheet 1.1, and the Z-direction heights of the silicon steel laminations in the remaining secondary sheets 1.2 gradually decrease in the X direction away from the main sheet 1.1, and the X-direction center lines of all the silicon steel laminations are located on the same straight line.

[0018] The total width of each silicon steel lamination in the iron yoke 1 in the X direction is equal to the width of the core column in the iron core in the X direction. The height of each secondary sheet 1.2 in the iron yoke 1 decreases suddenly in the Z direction, thereby forming a step portion between the upper and lower sides of adjacent secondary sheets 1.2. Alternatively, the height of each secondary sheet 1.2 in the iron yoke 1 decreases gradually in the Z direction, thereby forming a smooth curve portion between the upper and lower sides of adjacent secondary sheets 1.2.

[0019] The Z-upper end of each side clamp plate 2 is connected to the corresponding side of the upper clamp plate 3 by bolts, and a first connecting seat 4.1 is fixed to a side of each side clamp plate 2 facing away from the iron yoke 1 near the Z-upper end, and each first connecting seat 4.1 is screwed through with a first bolt connecting head 5.1, one end of the first bolt connecting head 5.1 passes through the side clamp plate on the corresponding side and extends into the space surrounded by the side clamp plate 2 and the upper clamp plate 3, and a first pull belt 6.1 is connected between the inserted ends of the first bolt connecting head 5.1, the first pull belt 6.1 passes over the Z-top of the iron yoke 1 and is clamped between the iron yoke 1 and the upper clamp plate 3, and the other end of each first bolt connecting head 5.1 is screwed and locked to the corresponding first connecting seat 4.1 by a nut.

[0020] A second connecting seat 4.2 is fixed to a side of each side clamp 2 facing away from the iron yoke 1 near the Z-direction lower end, and a second bolt connecting head 5.2 is screwed through each second connecting seat 4.2. One end of the second bolt connecting heads 5.2 on both sides are opposite to each other and a second drawstring 6.2 is connected therebetween. The second drawstring 6.2 passes over and is tightly attached to the Z-direction bottom of the iron yoke 1, and the other end of each second bolt connecting head 5.2 is screwed and locked to the corresponding second connecting seat 4.2 by a nut.

[0021] An insulating sheet 7 is fixed to the side of each side clamp plate 2 facing the iron yoke 1 and abuts against the corresponding side of the iron yoke 1 , and an ear plate 8 is fixed to the side of each side clamp plate 2 facing away from the iron yoke 1 .

[0022] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A rectangular iron yoke assembly of a three-column iron core of a transformer, characterized in that: It comprises a rectangular iron yoke composed of a plurality of silicon steel laminations stacked in the horizontal X direction, side clamps arranged on both sides of the iron yoke in the X direction, and an upper clamp arranged on the upper side of the iron yoke in the Z direction. The middle part of the iron yoke is a main-level sheet composed of a complete silicon steel lamination. The plurality of silicon steel laminations on both sides of the main-level sheet in the X direction are respectively secondary sheets. At least one silicon steel lamination closest to the main-level sheet in each secondary sheet has the same Z-direction height as the main-level sheet. The Z-direction heights of the silicon steel laminations in the remaining secondary sheets gradually decrease in the X direction away from the main-level sheet, and the X-direction center lines of all silicon steel laminations are located on the same straight line. The total width of each silicon steel lamination in the iron yoke in the X direction is equal to the width of the core column in the iron core in the X direction; The Z-upper end of each side clamp is connected to the corresponding side of the upper clamp by bolts, and a first connecting seat is fixed to a side of each side clamp facing away from the iron yoke near the Z-upper end, and a first bolt connecting head is threaded through each first connecting seat, one end of the first bolt connecting head passes through the side clamp on the corresponding side and extends into the space surrounded by the side clamp and the upper clamp, and a first pull belt is connected between the inserted ends of the first bolt connecting head, the first pull belt passes over the Z-top of the iron yoke and is clamped between the iron yoke and the upper clamp, and the other end of each first bolt connecting head is threaded and locked to the corresponding first connecting seat by a nut.

2. The rectangular iron yoke assembly of a three-column iron core of a transformer according to claim 1, characterized in that: The Z-direction height of each secondary sheet in the iron yoke decreases suddenly, thereby forming a step portion between the Z-upper and lower sides of adjacent secondary sheets.

3. The rectangular iron yoke assembly of a three-column iron core of a transformer according to claim 1, characterized in that: The Z-direction height of each secondary sheet in the iron yoke gradually decreases, thereby forming a smooth curve portion between the Z-upper and lower sides of adjacent secondary sheets.

4. The rectangular iron yoke assembly of a three-column iron core of a transformer according to claim 1, characterized in that: A second connecting seat is fixed on a side of each side clamp plate facing away from the iron yoke, near the Z-direction lower end position, and a second bolt connecting head is threaded through each second connecting seat. One end of the second bolt connecting heads on both sides are opposite to each other and a second pull strap is connected therebetween. The second pull strap passes over and is tightly attached to the Z-direction bottom of the iron yoke, and the other end of each second bolt connecting head is threadedly locked to the corresponding second connecting seat by a nut.

5. The rectangular iron yoke assembly of a three-column iron core of a transformer according to claim 1, characterized in that: An insulating sheet is fixed to the side of each side clamp facing the iron yoke and abutting against the corresponding side of the iron yoke, and an ear plate is fixed to the side of each side clamp facing away from the iron yoke.

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