Stern shaft tube sealing mechanism and stern shaft body thereof

The invention belongs to the field of stern shaft sealing, and discloses a stern shaft tube sealing mechanism and a stern shaft body thereof.The sealing mechanism comprises a stern shaft tube, a shaft grounding device is arranged above the right side of the stern shaft tube, a standby sealing ring is arranged on the left side of the shaft grounding device, and a connectable closing ring is arranged on the left side of the standby sealing ring; a stainless steel annular spiral spring is arranged between the retaining ring and the O-shaped ring; and the stern shaft sealing system is located on the left side of the retaining ring, and a sealing assembly gasket is arranged on the left side of the stern shaft sealing system. The stern shaft tube sealing system is a water-lubricated shaft sealing system, is made of a material with the highest quality, is longer in service life, is very safe, does not use lubricating grease or oil, is easy to mount and maintain, realizes efficient sealing, can adapt to the movement