Roller type contact sealing device for air preheater

The utility model discloses a roller type contact sealing device for an air preheater. The roller type contact sealing device for the air preheater comprises a radial sealing device body and an axial sealing device body, wherein the radial sealing device body is formed by installing a plurality of circular-truncated-cone-shaped rollers in a fan-shaped sealing box, the rollers are tightly pressed on a radial partition board by means of a part of the self weight of the sealing box and a spring hanger pressurizing mechanism, and sliding friction is replaced by rolling friction; meanwhile, each circular-truncated-cone-shaped roller is divided into a plurality of sections which are connected through a semispherical boss mechanism, in this way, each roller can be bent by a small angle, thermal deformation of a rotor is tracked; due to the fact that the circular-truncated-cone-shaped rollers are in contact with the radial partition board, direct air leakage in the radial direction is reduced. The axial sealing devic