Oil-immersed transformer using clamping piece made of non-metal material

Abstract

The invention discloses an oil-immersed transformer using a non-metal clamping piece. The oil-immersed transformer comprises an iron core, a coil, an oil tank and clamping piece assemblies. The coil is sleeved on a plurality of core columns of the iron core, the coil and the iron core are positioned in transformer oil of the oil tank, and the clamping piece assemblies are arranged on two sides of an upper iron yoke and a lower iron yoke of the iron core and are made of non-metal materials. The iron core sleeved with the coil is clamped through the clamping piece made of the non-metal material, stray loss of the magnetic field of the iron core in the clamping piece made of the metal material is eliminated, and the performance of the transformer is improved.

Description

technical field [0001] The invention relates to the technical field of transformer equipment manufacturing, in particular to an oil-immersed transformer using non-metallic clamping parts. Background technique [0002] The structure of the existing distribution transformer uses channel steel or bent steel plate of metal material as the upper and lower clamping parts to clamp the silicon steel core. When the transformer is energized and running, the magnetic field generated by the core will flow through the metal clamping parts and generate Circulating currents form part of the stray losses. [0003] In addition, the low-voltage coils of the existing distribution transformers mostly adopt a foil-wound structure, and the copper bar leads of the low-voltage coils can be led out from the inside and outside of the clamp. If the low-voltage copper bar is drawn out from the outside of the clamp, the copper bar needs to be bent, and at the same time, a support frame for fixing the i...

AI Technical Summary

Problems solved by technology

[0005] In general, the existing oil-immersed distribution transformer structure has the following disadvantages in the production and assembly process: 1. The clips are made of metal materials, which increases the stray loss; 2. The clips and coils are assembled with pads , The assembly is cumbersome; 3. The spacer compresses the coil, blocking the oil passage in the coil, and the transformer oil cannot flow and dissipate heat, which affects the product performance; 4. The inner and outer copper busbar leads of the low-voltage coil need to be bent and drawn out, and the clamps need to be insulated Components are fixed to ensure the insulation distance, the width is increased, and the assembly is cumbersome; 5. The width of the oil tank is increased, and the amount of transformer oil is increased; 6. The overall material is increased, and the cost is higher

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