Novel low-voltage stay dry-type transformer

Abstract

The utility model discloses a novel dry-type transformer with low-voltage stays, which at least comprises a first winding and a second winding, the second winding is sleeved on the outer ring of the first winding, a plurality of stays are arranged between the first winding and the second winding to form an air passage, and a cavity penetrating through two ends is arranged in each stay. In the field of dry-type transformers, the problems that a stay of an existing dry-type transformer is a solid stay, the heat dissipation efficiency is low, and the temperature rise of the transformer is large are solved, the cavity penetrating through the two ends of the stay is formed in the stay, the heat dissipation area of the stay is greatly increased, the heat dissipation efficiency of the stay can be greatly improved, and the temperature rise of the transformer is reduced.

Description

Technical Field

[0001] The utility model relates to the field of dry-type transformers, in particular to a dry-type transformer with a novel low-voltage support bar. Background Art

[0002] The stays of dry-type transformers play a crucial role, providing support and insulation between the windings and forming air passages to improve heat dissipation. Existing stays are made of solid fiber materials. However, this solid design compromises heat dissipation, increasing transformer temperature rise. Furthermore, these solid stays are very heavy and can easily sink and contact the iron core at the bottom of the transformer, causing a short circuit.

[0003] Therefore, there is an urgent need for a new type of dry-type transformer with low-voltage support bars, which can greatly improve the heat dissipation efficiency of the support bars, reduce the temperature rise of the transformer, and avoid short circuit caused by contact with the iron core at the bottom of the arrangement during use. Summary of the Invention

[0004] The purpose of the utility model is to provide a new type of dry-type transformer with low-voltage support bars, which can greatly improve the heat dissipation efficiency of the support bars, reduce the temperature rise of the transformer, and avoid short circuit caused by contact with the iron core at the bottom of the arrangement during use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a new type of low-voltage support bar dry-type transformer, comprising at least two windings, a first winding and a second winding, wherein the second winding is sleeved on the outer ring of the first winding, and a plurality of supports are provided between the first winding and the second winding to form an air passage, wherein a cavity passing through both ends is provided in the support bar, and the lower end of the support bar is coated with insulating paint when in use.

[0006] The stays feature cavities running through both ends, significantly increasing their heat dissipation area, significantly improving their heat dissipation efficiency and reducing transformer temperature rise. The stays themselves are lightweight, and their lower ends are coated with insulating varnish, preventing short circuits even if they come into contact with the iron core at the bottom of the arrangement.

[0007] Preferably, the other end of the stay is also coated with insulating paint, so as to avoid workers placing the stay upside down during actual processing, causing the end of the stay without insulating paint to contact the iron core.

[0008] Preferably, the support bars are perpendicular to the waist-shaped cross section of the winding, and all the support bars are symmetrically arranged along the symmetry axis of the waist-shaped cross section, so as to make the heat dissipation more uniform.

[0009] Preferably, the cross section of the support bar is a quadrilateral frame, which makes the support bar easy to manufacture and reduces manufacturing costs.

[0010] Preferably, the quadrilateral frame is an isosceles trapezoid.

[0011] Preferably, the support bar is made of aluminum alloy, which has good thermal conductivity and is conducive to heat dissipation.

[0012] Preferably, a plurality of reinforcing ribs are provided in the cavity to increase the strength of the support bar.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. A cavity running through both ends of the support bar is provided inside the support bar, which greatly increases the heat dissipation area of ​​the support bar itself, can greatly improve the heat dissipation efficiency of the support bar and reduce the temperature rise of the transformer.

[0015] 2. All the braces are symmetrically arranged along the axis of symmetry of the waist-shaped cross-section, making heat dissipation more uniform.

[0016] 3. The material of the support bar is aluminum alloy, which has good thermal conductivity and is conducive to heat dissipation.

[0017] 4. Both ends of the support bar are coated with insulating paint to prevent the support bar from contacting the iron core at the bottom of the arrangement after sinking.

[0018] 5. Several reinforcing ribs are set in the cavity to increase the strength of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic cross-sectional view of a dry-type transformer and a stay of a novel low-voltage stay shown in an embodiment;

[0020] Figure 2 A front view of a stay shown in the embodiment;

[0021] In the figure: first winding 1, second winding 2, strut 3, air duct 4, cavity 5, reinforcing rib 6. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy and purpose of the present invention, should still fall within the scope of the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0024] like Figure 1 and Figure 2 As shown, this embodiment shows a novel low-voltage stay-type dry-type transformer comprising at least two windings: a first winding 1 and a second winding 2. The second winding 2 is enclosed within the outer ring of the first winding 1. Several stays 3 are provided between the first and second windings 1 and 2 to form an air channel 4. A cavity 5 is provided within each stay 3, extending through both ends. The cavity 5 extending through both ends of the stay 3 significantly increases the heat dissipation area of ​​the stay 3, significantly improving the heat dissipation efficiency of the stay 3 and reducing the temperature rise of the transformer. The stays 3 are perpendicular to the waist-shaped cross-section of the winding, and all stays 3 are arranged symmetrically about the axis of symmetry of the waist-shaped cross-section. This ensures more uniform heat dissipation. The cross-section of the stay 3 is preferably a quadrilateral frame, and the shape of the quadrilateral frame is preferably an isosceles trapezoid. The stays 3 are made of aluminum alloy. Aluminum alloy has excellent thermal conductivity, which facilitates heat dissipation. Due to gravity, the stays 3 may sink and come into contact with the iron core at the bottom of the arrangement. Therefore, the lower ends of the stays 3 are coated with insulating varnish during use. However, in order to prevent workers from placing the stay upside down during actual processing, causing the end without insulating paint to contact the iron core, the present embodiment preferably coats both ends of the stay 3 with insulating paint. In order to increase the strength of the stay 3, a number of reinforcing ribs 6 are provided in the cavity 5.

[0025] Working principle: When the transformer is working, the winding will generate a lot of heat, which is conducted away along the inner and outer surfaces of the air duct 4 and the support 3. Because the inner surface of the cavity 5 can greatly increase the heat dissipation area, the heat dissipation efficiency of the support can be greatly improved, reducing the temperature rise of the transformer.

[0026] As described above, the utility model provides a new type of dry-type transformer with low-voltage stays. The stays are provided with cavities running through both ends, which greatly increases the heat dissipation area of ​​the stays themselves, can greatly improve the heat dissipation efficiency of the stays, and reduce the temperature rise of the transformer. All the stays are arranged symmetrically about the symmetry axis of the waist-shaped cross-section. This makes the heat dissipation more uniform. The stays are made of aluminum alloy, which has good thermal conductivity and is conducive to heat dissipation. Both ends of the stays are coated with insulating paint to prevent the stays from contacting the iron core at the bottom of the arrangement after sinking. A number of reinforcing ribs are provided in the cavity. This increases the strength of the stays.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A novel low-voltage support bar dry-type transformer, comprising at least two windings, a first winding (1) and a second winding (2), wherein the second winding (2) is sleeved on the outer ring of the first winding (1), characterized in that: A plurality of struts (3) are provided between the first winding (1) and the second winding (2) to form an air passage (4); a cavity (5) passing through both ends is provided in the struts (3); and the lower end of the struts (3) is coated with insulating paint when in use; The struts (3) are perpendicular to the waist-shaped cross section of the winding, and all the struts (3) are symmetrically arranged along the axis of symmetry of the waist-shaped cross section; the cross section of the struts (3) is a quadrilateral frame; and the shape of the quadrilateral frame is an isosceles trapezoid.

2. The novel low-voltage support bar dry-type transformer according to claim 1 is characterized in that: The other end of the stay (3) is also coated with insulating paint.

3. The novel low-voltage support bar dry-type transformer according to claim 1 is characterized in that: The material of the support bar (3) is aluminum alloy.

4. The novel low-voltage stay dry-type transformer according to any one of claims 1 to 3, characterized in that: A plurality of reinforcing ribs (6) are provided in the cavity (5).

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