| 摘要 |
A transformer is provided to reduce manufacturing cost and the number of processes due to a plurality of clamps by firmly coupling a cover unit on an upper end of a body through one fixing bolt and one fixing nut. A transformer includes a body(102), a supporting unit(103), a packing(104), a cover unit(107), a reinforcing frame(109), and a fixing unit(110). The body(102) receives cooling oil. The supporting unit(103) has a cross section of a U shape, and is welded to form an L-shaped supporting protrusion at an outer circumference separated by a predetermined distance from an upper end of the body(102). The packing(104) is tube-shaped, is installed at the supporting protrusion of the supporting unit(103), is contacted to an outer surface of the upper end of the body(102), and has a hollow unit charged with air of a predetermined volume. The cover unit(107) has a flange of a predetermined width toward a circumferential direction to be attached to an upper part of the packing(104), is formed in the shape of a cone facing a center, and has a through hole at the center. The reinforcing frame(109) is welded at any point of an upper end of an inner surface of the body(102) and the inner surface of the body symmetric to the point, welds a fixing bolt(108) to stand at a center and penetrate the through hole of the cover unit(107). The fixing unit(110) is coupled to the fixing bolt(108) penetrating the through hole of the cover unit(107).
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