Inflatable powder shaft seal

Abstract

The utility model discloses an inflatable powder shaft seal which comprises a bearing box and a shaft body, the shaft body is rotationally connected to the bearing box, and the shaft body is fixedly connected with a movable ring. The moving ring and the static ring are rotationally connected, an air inlet is formed in the top of the static ring, the static ring comprises an atmosphere side static ring, a connecting block and a powder side static ring, and the powder side static ring is fixedly connected with the bearing box; the connecting block is fixedly connected with a powder side static ring; threads are arranged on the inner ring face of the atmosphere side static ring and are in threaded connection with the connecting block, horizontal threaded holes are formed in the atmosphere side static ring and the connecting block, and the horizontal threaded holes are in threaded connection with fixing bolts. A plum blossom petal-shaped rubber sleeve is fixed to the outer side of the shaft body, the distance between the atmosphere side static ring and the powder side static ring is adjusted by rotating the atmosphere side static ring in threaded connection with the connecting block, and abrasion consumption of the movable ring is made up. The plum blossom petal-shaped rubber sleeve is arranged, so that movement is avoided, and abrasion is reduced; by arranging the fixing bolt, the atmosphere side static ring is prevented from rotating in the rotating process of the rotating shaft, and the moving ring is prevented from being separated from the static ring.

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