The invention discloses an oil seal structure and an oil seal method for a cooling
transformer, comprising an upper cover plate, the upper cover plate is arranged in the inner cavity of an
oil tank of a
transformer, and the long side of the upper cover plate is connected with a
long axis side oil seal One end of the
cardboard, the other end of the oil seal
cardboard on the
long axis side is in contact with the bottom inner wall of the
fuel tank, one end of the oil seal
cardboard on the
short axis side is connected to the broad side of the upper cover plate, and the other end of the oil seal cardboard on the
short axis side One end is in contact with the bottom inner wall of the
oil tank, the oil seal cardboard on the
long axis side, the oil seal cardboard on the
short axis side, the upper cover plate and the inner wall at the bottom of the
oil tank of the
transformer enclose the cavity of the
synthetic oil seal structure, the other end of the oil seal cardboard on the long axis side and The other end of the oil seal cardboard on the side of the short axis is bent toward the cavity inner cavity of the oil seal structure, and the upper cover plate and the inner wall of the bottom of the oil tank are connected by a support member. The invention has low manufacturing cost, and the cavity of the oil seal structure has
scalability, which ensures a stable flow rate of oil entering the coil.