A water under high pressure sealing device and entry driving machine for entry driving machine

The utility model discloses a water under high pressure sealing device and entry driving machine for entry driving machine, the fender encircles (2), rotatory check come ring (3), sealing ring (4), wear ring (6), parallel key (7) and retaining ring (8) including sealing, and sealed fender encircles to be fixed on coupleing a section of thick bamboo (1), the sealing ring is installed on rotary main shaft, and sealed keeping off is encircled and is coupleed between the section of thick bamboo and all be equipped with O shape circle between sealing ring and the rotary main shaft, sealed keeping off is equipped with the wear ring and is rotated check and enclose between ring and the sealing ring, be equipped with the parallel key between sealing ring and the rotary main shaft, the last recess that is equipped with of rotary main shaft is equipped with the retaining ring in. The utility model discloses water under high pressure sealing device's setting for the water -stop effect of cutting units improves, and there is good result of use in the spraying water route in making, improves the borehole operation environment, and guarantee operation personnel's is healthy, reduces the pick rate of wear simultaneously, reduces rotary main shaft's the degree of wear, has improved the reliability of cutting units.