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Fixing the Iron Core: Transformer clamps can tightly fasten various parts of the iron core into a stable whole, ensuring that the iron core does not shift or shake during the operation of the transformer, thus maintaining the integrity and stability of the magnetic circuit.
Withstanding Weight and Force: Clamps bear the weight of the transformer body, including the iron core and windings, as well as the axial force generated by the coils when the transformer is short-circuited. They play a supporting and stabilizing role to ensure the mechanical strength of the transformer.
Assisting Heat Dissipation: Some clamps are designed with ventilation holes or heat dissipation structures. For example, new-type transformer clamps have ventilation holes on the inner wall of the support plate and are equipped with dust screens, which can prevent debris from entering and facilitate rapid heat exchange between the heat generated by the iron core during operation and the external air.
Structural Composition
Upper and Lower Clamps: Located at the upper and lower ends of the iron core respectively, they are used to clamp the iron core. For transformers with large capacity, the iron yoke clamping measures adopt a "square iron" structure at the corner of the iron core; if there is no square iron, the upper and lower clamps are connected by tension screws.
Pull Plates: To meet the requirements of lifting the body and bearing the mechanical force of the coils, the force transmission between the upper and lower clamps relies on "pull plates" close to the surface of the iron core. Pull plates are made of low-carbon materials to prevent excessive losses caused by magnetic flux leakage in them.
Webs and Limb Plates: Structural parts welded from steel plates. The steel plates parallel to the surface of the iron yoke are called webs, and the two upper and lower reinforcing plates perpendicular to the webs are called limb plates. In addition, reinforcing plates or limb plates of different shapes and sizes are welded to enhance the strength of the clamps and meet the installation requirements of accessories on the transformer body, such as lead brackets and tap changer brackets.