Self-ventilation heat dissipation type oil-immersed transformer

Abstract

The invention discloses a self-ventilation heat dissipation type oil-immersed transformer, and belongs to the field of transformer equipment. Innovative presetting of ventilation heat dissipation holes in heat dissipation fins can be realized, the migration action of magnetic migration air exchange balls is triggered through the magnetic action after heat is sensed, the magnetic migration air exchange balls are forced to migrate in the ventilation heat dissipation holes and push air to advance towards the interior of a transformer body, air blowing films are inflated and expanded to increase the contact area with transformer oil, the heat conduction effect of the transformer oil can be improved, and meanwhile the contact area can be increased to improve the heat exchange effect. In addition, air in the ventilation heat dissipation holes enters the air blowing films and then is supplemented by external cold air, after the magnetic migration air exchange balls are cooled, the magnetic migration air exchange balls are reset under the elastic action of elastic pull wires, the migration action is repeated, the contact area of the heat dissipation fins and the external air can be increased, and meanwhile the heat exchange effect is improved in an active ventilation mode, and therefore, the heat dissipation performance of the heat dissipation fins is greatly improved.

Description

technical field [0001] The invention relates to the field of transformer equipment, in particular to a self-ventilating heat dissipation oil-immersed transformer. Background technique [0002] A transformer is a static electrical device used to convert AC voltage and current to transmit AC power. It is based on the principle of electromagnetic induction to achieve electrical energy transfer. Transformers can be divided into power transformers, test transformers, instrument transformers and special-purpose transformers in terms of their uses: power transformers are necessary equipment for power transmission and distribution, and power user distribution; test transformers can withstand voltage (boost) for electrical equipment Test equipment; instrument transformers are used for electrical measurement and relay protection of power distribution systems (PT, CT); special-purpose transformers include electric furnace transformers for smelting, welding transformers, rectifier tran...

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Problems solved by technology

For small-capacity transformers, smooth oil tank surface is enough to cool the oil; for medium-capacity transformers, the surface of the oil tank should be wrinkled to increase the heat dissipation surface, or a fin or flat tube radiator should be installed to make the oil circulate in the radiator A radiation radiator should be added on the surface of the large-capacity transformer oil tank, but the existing transformer oil tank is basically static and passive during heat dissipation, and the heat dissipation effect is very limited, resulting in that the heat cannot be dissipated to the outside in time, resulting in local overheating inside the oil tank, and then Cause the transformer oil to decompose and produce gas, which affects the normal use of the transformer

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