Dry-type transformer convenient for heat dissipation

Abstract

The utility model discloses a dry-type transformer convenient for heat dissipation, relates to the technical field of transformers, and aims to solve the problems that air blown out by a fan cannot be completely blown into an air passage, part of the air passage is blocked by a lower clamping piece, and the air speed in the air passage is low, so that the heat dissipation effect of a coil is poor. According to the technical scheme, an iron core, a secondary winding and a primary winding are included, an iron core air channel is formed between the secondary winding and the iron core, clamping pieces are arranged on the two sides of the end of the iron core, a vortex fan is arranged on the outer side of the lower clamping piece, an air outlet of the vortex fan faces upwards, and an air guiding device is arranged at the air outlet of the vortex fan and comprises a plurality of air guiding pieces. The air guide pieces comprise the inner air guide pieces and the outer air guide pieces, and the inner air guide pieces and the outer air guide pieces incline towards the two sides and are arranged in a central symmetry mode. According to the utility model, air blown out by the vortex fan is shunted, so that the air velocity in each air channel is improved, an air deflector does not need to be additionally arranged in the transformer, the manufacturing process of the transformer is reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and more specifically, to a dry-type transformer which is convenient for heat dissipation. Background Art

[0002] Transformers are electrical devices that use the principle of electromagnetic induction. The main components are primary windings, secondary windings and iron cores (magnetic cores). Transformers are widely used in power transmission and distribution in many fields such as industry, agriculture, and transportation, and are an indispensable part of modern power systems.

[0003] The structure of dry-type transformers with fans has become the mainstream in the current market. The fans are generally installed at the bottom of the transformer coil. There are air ducts between the transformer windings for air circulation and heat dissipation. When using the fan to cool the transformer coil, the fan needs to maintain a certain safe distance from the transformer. Therefore, the wind blown by the fan cannot be completely blown into the air duct, and part of the air duct is blocked by the lower clamp. The wind speed in the air duct is low, resulting in poor heat dissipation of the coil and affected transformer performance.

[0004] In response to the above problems, a Chinese patent with announcement number CN209804412U discloses a variable frequency speed regulation dry-type rectifier transformer with an air guide plate, the technical key points of which are: the transformer includes at least one transformer body, the transformer body includes: a high-voltage coil, a low-voltage coil and an auxiliary coil, the high-voltage coil is located at the center of the coil, the low-voltage coil is located radially outside the high-voltage coil, and the auxiliary coil is located at the axial lower end of the low-voltage coil; the high-voltage coil is a cylindrical structure, the low-voltage coil and the auxiliary coil are continuous structures, and the low-voltage coil includes a phase-shifting coil and a main coil; the three-phase coils LA, LB, and LC are arranged in an equilateral triangle, and all the terminal terminals are arranged on the sides of the triangle ABC; an air duct is formed between the upper and lower windings of the low-voltage coil; an air guide plate is arranged on the left and / or right side of the outer layer of the low-voltage coil, the air guide plate is in the same curved shape as the low-voltage coil, and the air guide plate is used to increase the wind speed of the air inlet and outlet of the air duct to improve the air cooling efficiency.

[0005] This solution can increase the speed of air passing through the coil and improve the heat dissipation efficiency under the premise of unchanged fan power. However, this solution cannot make the wind cover all air passages. The wind speed in the air passage close to the iron core is low, and the heat dissipation effect is poor. In addition, adding air guide plates to the transformer will increase the manufacturing process and increase the manufacturing cost. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a dry-type transformer that is easy to dissipate heat. The solution has a simple structure, and the wind guide device can increase the coverage area of ​​the wind blown by the vortex fan, increase the air intake of the airway, increase the wind speed in the airway, and enhance the heat dissipation effect.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: a dry-type transformer that is easy to dissipate heat, including an iron core, a secondary winding and a primary winding, an iron core airway is formed between the secondary winding and the iron core, clamps are provided on both sides of the end of the iron core, a vortex fan is provided on the outer side of the lower clamp, the air outlet of the vortex fan faces upward, and an air guide device is provided at the air outlet of the vortex fan, the air guide device includes a plurality of air guide plates, the air guide plates include inner air guide plates and outer air guide plates, the inner air guide plates and the outer air guide plates are inclined to both sides and are centrally symmetrically arranged.

[0008] By adopting the above technical scheme, the utility model is further configured as follows: the spacing between the inner air guide blades is 20 to 30 mm, the spacing between the outer air guide blades is 20 to 30 mm, the angle between the inner air guide blades and the horizontal direction is 45 to 75 degrees, and the angle between the outer air guide blades and the horizontal direction is 45 to 75 degrees.

[0009] By adopting the above technical solution, the utility model is further configured as follows: the secondary winding also includes a secondary winding air duct one and a secondary winding air duct two, and the primary winding also includes a primary winding air duct.

[0010] By adopting the above technical solution, the utility model is further configured as follows: the air guide device includes two mounting frames, the mounting frames are L-shaped, the two mounting frames are centrally symmetrically arranged, and the two ends of the air guide plate are connected to the mounting frames.

[0011] In summary, the utility model has the following beneficial effects:

[0012] 1. The air guide device is arranged at the air outlet of the vortex fan, and there is no need to add an air guide plate in the transformer, which reduces the manufacturing process of the transformer and saves costs.

[0013] 2. The air guide vanes divert the wind blown out by the vortex fan, expand the wind coverage area, increase the air flow rate in each airway, and enhance the overall heat dissipation effect of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0017] Figure 3 It is a structural schematic diagram of the air guide device.

[0018] In the figure: 1. iron core; 101. iron core air duct; 2. secondary winding; 201. secondary winding air duct one; 202. secondary winding air duct two; 3. primary winding; 301. primary winding air duct; 4. vortex fan; 5. air guide device; 501. air guide vane; 501a. inner air guide vane; 501b. outer air guide vane; 502. mounting frame. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] 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 people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed in this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of the implementation of this utility model. The specific structure can be described with reference to the drawings of the patent application.

[0021] Example: Figures 1 to 3 As shown, in order to solve the problems in the prior art that the wind blown by the fan cannot cover the entire airway, the air intake volume of the airway is small, the wind speed is low, and the heat dissipation effect is poor, the utility model proposes a dry-type transformer that is easy to dissipate heat. The dry-type transformer that is easy to dissipate heat includes an iron core 1, a secondary winding 2 and a primary winding 3. An iron core airway 101 is formed between the secondary winding 2 and the iron core 1. Clamps are provided on both sides of the end of the iron core 1, and a vortex fan 4 is provided on the outer side of the lower clamp. The air outlet of the vortex fan 4 faces upward, and an air guide device 5 is provided at the air outlet of the vortex fan 4. The air guide device 5 includes a plurality of air guide plates 501. The air guide plates 501 include inner air guide plates 501a and outer air guide plates 501b. The inner air guide plates 501a and the outer air guide plates 501b are inclined to both sides and are centrally symmetrically arranged.

[0022] Preferably, according to the above embodiment, the spacing between the inner air guide blades 501a is 20 to 30 mm, the spacing between the outer air guide blades 501b is 20 to 30 mm, the inner air guide blades 501a and the horizontal direction have an angle of 45 to 75 degrees, and the outer air guide blades 501b and the horizontal direction have an angle of 45 to 75 degrees.

[0023] Preferably, according to the above embodiment, the secondary winding 2 further includes a secondary winding air channel 1 201 and a secondary winding air channel 202 , and the primary winding 3 further includes a primary winding air channel 301 .

[0024] Preferably, according to the above embodiment, the air guide device 5 includes two mounting frames 502 , the mounting frames 502 are L-shaped, the two mounting frames 502 are centrally symmetrically arranged, and both ends of the air guide piece 501 are connected to the mounting frames 502 .

[0025] According to the above embodiments, specifically, the number of inner air guide pieces 501a is four, and the four inner air guide pieces 501a form three air ducts, which are respectively matched with the core air duct 101, the secondary winding air duct 1 201, and the secondary winding air duct 2 202; the number of outer air guide pieces 501b is three, and the three outer air guide pieces 501b form two air ducts, which are respectively matched with the primary winding air duct 301 and the outer wall space of the primary winding; the air duct formed between the adjacent inner air guide pieces 501a and the outer air guide pieces 501b matches the space between the primary winding and the secondary winding; the air guide device 5 divides the wind blown out by the vortex fan 4 into multiple airflows in different directions, corresponding to each air duct in the transformer, thereby increasing the air intake and wind speed in each air duct and enhancing the overall heat dissipation effect of the transformer.

[0026] 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 familiar with the technology 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 a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A dry-type transformer that is easy to dissipate heat, characterized in that: The invention comprises an iron core (1), a secondary winding (2) and a primary winding (3); an iron core airway (101) is formed between the secondary winding (2) and the iron core (1); clamps are provided on both sides of the end of the iron core (1); a vortex fan (4) is provided on the outer side of the lower clamp; the air outlet of the vortex fan (4) faces upward; an air guide device (5) is provided at the air outlet of the vortex fan (4); the air guide device (5) comprises a plurality of air guide blades (501); the air guide blades (501) comprise inner air guide blades (501a) and outer air guide blades (501b); the inner air guide blades (501a) and the outer air guide blades (501b) are inclined towards both sides and are centrally symmetrically arranged.

2. A dry-type transformer that is easy to dissipate heat according to claim 1, characterized in that: The spacing between the inner air guide blades (501a) is 20 to 30 mm, the spacing between the outer air guide blades (501b) is 20 to 30 mm, the angle between the inner air guide blades (501a) and the horizontal direction is 45 to 75 degrees, and the angle between the outer air guide blades (501b) and the horizontal direction is 45 to 75 degrees.

3. A dry-type transformer that is easy to dissipate heat according to claim 1, characterized in that: The secondary winding (2) further comprises a secondary winding air channel 1 (201) and a secondary winding air channel 2 (202), and the primary winding (3) further comprises a primary winding air channel (301).

4. A dry-type transformer for facilitating heat dissipation according to claim 1, characterized in that: The air guide device (5) comprises two mounting frames (502), the mounting frames (502) are L-shaped, the two mounting frames (502) are centrally symmetrically arranged, and the two ends of the air guide plate (501) are connected to the mounting frames (502).

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