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Heat dissipating device for oil-immersed transformer

An oil-immersed transformer and cooling device technology, applied in the field of transformers, can solve problems such as weak heat dissipation performance, achieve the effects of improving work capacity, reducing costs, and improving convective heat transfer efficiency

Inactive Publication Date: 2013-10-23
WEIFANG LULI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide an oil-immersed transformer cooling device with improved heat dissipation performance for the defect of weak heat dissipation performance of traditional oil-immersed transformers

Method used

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  • Heat dissipating device for oil-immersed transformer
  • Heat dissipating device for oil-immersed transformer
  • Heat dissipating device for oil-immersed transformer

Examples

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Embodiment Construction

[0018] Examples such as figure 1 As shown, an oil-immersed transformer cooling device includes an oil-immersed transformer heat sink 1, the length H of the oil-immersed transformer heat sink 1 is 800mm, and the width W is 480mm; the oil-immersed transformer heat sink 1 is stamped There are several three-dimensional convex spoiler structures.

[0019] Several three-dimensional protruding spoiler structures are arranged in a staggered manner at a certain distance, the horizontal spacing S1 is 80 mm, and the longitudinal spacing S2 is 40 mm.

[0020] The distance a between the first row of three-dimensional protruding spoiler structures and the bottom of the heat sink of the oil-immersed transformer is 240mm.

[0021] The three-dimensional protruding spoiler structure is a triangular conical longitudinal vortex generator 2 .

[0022] Such as figure 2 , image 3 As shown, the height d of the triangular conical longitudinal vortex generator 2 is 10 mm, and the angle of attack ...

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Abstract

The invention discloses a heat dissipation device for an oil-immersed transformer. The heat dissipation device comprises an oil-immersed transformer radiating fin on which a plurality of stereoscopic protruding spoiler structures are punched; the plurality of stereoscopic protruding spoiler structures are staggered at a certain interval, and are 80 mm in transversal space and 40 mm in longitudinal space; preferably, the oil-immersed transformer radiating fin is 800 mm in length and 480 mm in width; the first row of stereoscopic protruding spoiler structures are 240 mm away from the bottom of the oil-immersed transformer radiating fin. According to the invention, longitudinal vortex generated by the stereoscopic protruding spoiler structures destroys a flowing boundary layer formed when air flow passes through the radiating fin, so that convective heat exchange between the radiating fin and air is enhanced. The numerical calculation result shows that when a longitudinal vortex generator is available, the watt-dissipating capacity is improved by about 7% in comparison with the watt-dissipating capacity under the condition of no longitudinal vortex generators.

Description

technical field [0001] The invention relates to a heat sink, in particular to an oil-immersed transformer cooling device which improves the heat dissipation performance of the heat sink, and belongs to the technical field of transformers. Background technique [0002] Oil-immersed transformers have the characteristics of low loss, large capacity, and low price. At present, most of the power transformers running on the power grid are oil-immersed transformers. During the operation of oil-immersed transformers, the energy consumed in the iron core and windings is converted into heat. Ensuring the normal operating temperature of the transformer is of great significance to the service life and stable operation of the transformer. Since the air side convective heat transfer thermal resistance is the main thermal resistance in the whole heat dissipation process, increasing the air side convective heat transfer thermal resistance of oil-immersed transformer cooling fins and improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F13/02H01F27/08
Inventor 宋继波
Owner WEIFANG LULI MACHINERY
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