Oil-immersed transformer cooling fin

A technology for oil-immersed transformers and heat sinks, applied in transformer/inductor cooling, laminated components, heat transfer modification, etc., can solve problems such as unfavorable applications, inability to carry out punching design, cumbersome processes, etc., and achieve easy processing. , Improve the convective heat transfer efficiency, the effect of simple process

Inactive Publication Date: 2014-09-03
SHANDONG JIANZHU UNIV
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  • Abstract
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Problems solved by technology

[0003] Longitudinal vortex generator is an effective passive heat transfer enhancement method. The turbulence device can be divided into two types according to the shape: airfoil vortex generator and turbulent column vortex generator, but most airfoil longitudinal vortex generators are The fins are obtained by punching, and the inside of the heat sink of the oil-immersed transformer cannot be designed for punching because it is filled with transformer oil; if welding and other processes are used to add an airfoil or spoiler-shaped longitudinal vortex generator , the process is relatively cumbersome, which is not conducive to engineering applications

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  • Oil-immersed transformer cooling fin
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  • Oil-immersed transformer cooling fin

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Embodiment Construction

[0023] The following uses a triangular pyramid longitudinal vortex generator as an example to illustrate the present invention, but it is not used to limit the scope of the present invention.

[0024] see Figure 1-2 , Figure 7 , the present invention takes a selected triangular conical longitudinal vortex generator as an example to carry out numerical calculation on the working condition of natural air convection of oil-immersed transformer cooling fins. figure 1 A number of three-dimensional protruding spoiler structures obtained by stamping, embossing and other processing methods in the manufacturing process of oil-immersed transformer heat sinks are given in . A certain spoiler structure is a longitudinal vortex generator. The spoiler structure It is a triangular cone, and the bottom of the triangular cone is seamlessly connected or integrated with the heat sink of the oil-immersed transformer. The parameters used in the numerical example are as follows: the length and w...

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Abstract

The invention discloses an oil-immersed transformer cooling fin. A series of three-dimensional protruding turbulence structures are arranged on the air side of the oil-immersed transformer cooling fin through machining modes such as stamping and embossing, the turbulence structures can be in shapes of a pyramid, a semi-conical table body, a semi-bullhead protrusion and the like, a longitudinal vortex generator is formed, the longitudinal vortex generated by the three-dimensional protruding turbulence structures destroy the flowing boundary layer generated when air flows through the cooling fin, and therefore heat convection between the cooling fin and air is enhanced. The oil-immersed transformer cooling fin is simple in structure, low in cost, and capable of improving the heat convection efficiency to a certain degree.

Description

technical field [0001] The invention relates to a mechanical device. In particular, it relates to a heat sink for improving heat dissipation of an oil-immersed transformer. Background technique [0002] Oil-immersed transformers have the characteristics of low loss, large capacity, and low price. At present, most of the power transformers operating on the grid are oil-immersed transformers. During the operation of oil-immersed transformers, the energy consumption in the iron core and windings is transformed into To ensure 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 factor affecting the entire heat dissipation process, improving the air side convective heat transfer efficiency of the oil-immersed transformer heat sink can effectively improve the overall heat dissipation capacity of the oil-immersed transforme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F3/00F28F13/06H01F27/08
Inventor 于明志王强范雪晶
Owner SHANDONG JIANZHU UNIV
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