| 摘要 |
A rotary sealing device comprises a base for side branch, body, unit for fixation of the body, tube with rotary unit and sealing element installed in the body, bearings placed in the rotary unit with system of fixation and lubrication of those. The sealing element is arranged with central square opening for drill drive tube, on the outer surface of the sealing element reinforcement frame is installed, this is connected to the sealing element by means of lugs and depressions in form of trapezium. The lower end of the sealing element is made conical without reinforcement frame, on the inner surface of the central square opening in perimeter semi-round grooves are provided, and the upper end of the sealing element is arranged with conical surface. |
