Clamping and noise reducing structure for epoxy cast dry-type transformer core

Abstract

The invention discloses a clamping and noise reducing structure for an epoxy cast dry-type transformer core. The structure comprises pull belts, pull belt supporting plates and tightening bolts. The pull belt supporting plates are arranged on the upper end face and the lower end face of an upper clamping piece and the upper end face and the lower end face of a lower clamping piece, open grooves are formed in the ends of the tightening bolts, and the two ends of the pull belts are connected in the open grooves. Connecting holes are formed in the pull belt supporting plates, the pull belts are tightly clamped in a yoke part of the core through the tightening bolts arranged in the connecting holes, and pull belt insulators are arranged between the pull belts and the core. The clamping and noise reducing structure is simple and easy to implement, the assembling reliability is sufficiently ensured, the running noise is low, and the production market requirement is met.

Description

technical field [0001] The invention belongs to the field of transformer manufacturing, and relates to an epoxy casting dry-type transformer core clamping noise reduction structure. Background technique [0002] The iron core clamping structure of the traditional epoxy resin dry-type transformer is as follows: Figure 1 to Figure 4 shown. There are notches 13 on the upper and lower end surfaces of the middle part of the upper clamp 11 and the lower clamp 12. After the lamination of the iron core 14 is completed, the tie hoop 15 is inserted, and an insulating buckle 18 is provided on the tie hoop to tighten the tension on the tie hoop. The screw rod 17 clamps the iron yoke part of the iron core, and then tightens the two ends of the clip to clamp the screw rod 16 to fix the iron core part of the iron core, and a pull hoop insulation 19 is arranged between the tie hoop and the iron core. For a long time, the cross-section of the iron core is mainly circular, the diameter of t...

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Problems solved by technology

The resulting problem is: the size of the channel steel is small, the steel itself is difficult to meet the requirements, the clamping force required for the clamping of the iron yoke is not enough, the noise of the iron core becomes larger, and the operating noise of the dry-type transformer is dry. It is a very important indicator of variable operation, and the resulting problems have seriously affected the quality of the product; and the gap between the channel steel slots becomes smaller, the assembly space of the tie hoop is limited, and the original tie hoop structure is difficult to assemble

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