Shaft sealing device

The embodiment of the invention discloses a shaft sealing device. The shaft sealing device comprises a shell body. The shell body is a cover-shaped shell body with a uniform cavity and provided with a sealed cavity penetrating through the end surface of the shell body; a spiral cleaning piece distributed in a spiral shape is arranged on the inner wall of the sealed cavity and matched with a shaft, and the sealed cavity is in interference, detachable and sleeving connection with the shaft; the thread direction of the spiral cleaning piece enables pollutants on the shaft to be subjected to back-out axial action force. When the shaft sealing device is used, the shell body covers an end cover to form a new sealed space to prevent pollutants from entering. In addition, the shaft sealing device is fixedly installed on a bearing seat, the shaft rotates relative to the shaft sealing device at high speed, and the thread direction of the spiral cleaning piece enables the pollutants attached to the shaft to be blocked by the spiral cleaning piece, be discharged out spirally and get far away from the connecting position of the shaft and the end cover, so that pollution of the pollutants is effectively prevented, and the sealing performance is improved.