RESONANCE TYPE NOISE REDUCTION APPARATUS FOR TRANSFORMER SEALING STRUCTURE

摘要

PURPOSE: A resonance type noise reduction apparatus for a transformer sealing structure is provided to sweep noise of pure tone generated by the transformer on an inner wall of a sealing box, thereby preventing emission of the noise to the outside and complement the blocking performance of the sealing box. CONSTITUTION: In a resonance type noise reduction apparatus for a transformer sealing structure in which a transformer, the source of noise is mounted inside and surrounded by a sealing box for preventing diffusion of the noise to the outside, a helmholtz resonance type apparatus(100) is mounted on an inner wall with a predetermined distance from the inner wall for sweeping noise of pure tone and preventing emission of the noise generated by the transformer(300) by resonance phenomenon in the sealed space of the sealing box(200), wherein the helmholtz resonance type apparatus includes a porous plate(110) formed of a plurality of holes(111) of a predetermined size with a regular interval, and the porous plate is mounted on a soundproof wall surface with a predetermined space by a grating(120) for forming an air gap of a predetermined distance.