Container type mechanical seal for high-rotating-speed expansion machine

The utility model discloses a packaging type mechanical seal for a high-rotating-speed expansion machine, which comprises a shaft sleeve, a movable ring is sleeved outside one end of the shaft sleeve, a flange cover is sleeved outside the other end of the shaft sleeve, and a stationary ring component capable of sliding along the axial direction is assembled at one end of the flange cover close to the movable ring. The end, away from the flange cover, of the static ring assembly abuts against one end of the movable ring in a relatively rotating mode to form a sealing grinding face, and an elastic compensation piece is arranged between the end, away from the movable ring, of the static ring assembly and the flange cover. The end, away from the static ring assembly, of the flange cover is detachably connected with a plurality of limiting blocks, a limiting groove is formed in the outer side wall of the shaft sleeve, one ends of the limiting blocks are assembled in the limiting groove, and the shaft sleeve, the m