Novel main shaft sealing device

The utility model discloses a novel main shaft sealing device. Seal comprising a seal body, a sealing groove is formed in the sealing body; an isolating ring is arranged on one side of the sealing groove in a sliding manner; a lip spitting type rubber ring is arranged on one side of the isolating ring; a lip spitting type rubber ring is arranged between the two isolating rings; one lip spitting type rubber ring is arranged on one side of the isolation ring on the leftmost side, a pressing ring is arranged on one side of the lip spitting type rubber ring on the leftmost side, an inner hexagonalthreaded hole is formed in one end of the sealing groove, and an inner hexagonal threaded rod is meshed with the interior of the inner hexagonal threaded hole. The lip-spitting type rubber ring is arranged, sealing is effectively achieved through hydraulic extrusion, large operation cost is saved, the inner hexagonal threaded rod is adjusted to push the pressing ring, the tightness degree betweenthe isolation ring and th