Dry type transformer

Abstract

The invention discloses a dry type transformer, which comprises a base, two sets of fans and a transformer body. The transformer body comprises a clamp device, a three-phase three-column iron core andcoils of three phases. The clamp device comprises a front upper clamp, a rear upper clamp, a front lower clamp, a rear lower clamp and six pulling plates; the upper ends and the lower ends of the three pulling plates are respectively connected to the front upper clamp and the front lower clamp through pulling plate pins; the upper ends and the lower ends of another three pulling plates are respectively connected to the rear upper clamp and the rear lower clamp through pulling plate pins. Cushion blocks are arranged at the upper end and the lower end of the coil of each phase; an air guide groove is arranged in the upper end surface of a cushion block body; a circle of ventilation holes which coaxially communicate with a circle of middle axial air channel rods in a high-voltage coil winding are respectively arranged in an upper end cover and a lower end cover of a sealing body of a high-voltage coil of the coil of each phase; and the upper end cover and the lower end cover respectivelycorrespond to a wire outlet panel box and are coaxially provided with two ventilation openings. According to the dry type transformer, the internal heat can be effectively reduced, so that the performance of the transformer is improved, and the transformer is convenient to assemble.

Description

technical field [0001] The invention relates to a dry type transformer. Background technique [0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC mechanical equipment and other places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil. Cooling methods are generally divided into natural air cooling and forced air cooling. When naturally air-cooled, the transformer can operate continuously for a long time at the rated capacity. When forced air cooling, the output capacity of the transformer can be increased by 50%. Therefore, the front and rear parts of the base of the general dry-type transformer are equipped with side-blowing fans, and the side-blowing fans blow toward the center of the transformer respectively. Dry-type transformers usually include a base, a fan installed on the base, a clamp device, an iron core clamped in the clamp device and a thr...

AI Technical Summary

Problems solved by technology

With this structure, when the low-voltage coil is set, the coil is easy to touch the pin, which makes it inconvenient to set the low-voltage coil

In addition, because the clamps of this structure are not strong enough, two reinforcement plates must be welded on the upper and lower edges of the front and rear clamps, and two longitudinal tie rods are connected between the reinforcement plates, which not only increases the number of components Also increase the processing procedures, the shape of the transformer is not beautiful

Images