Sealing device for preventing leakage of pressurized medium...

Details Sealing device for preventing leakage of pressurized medium... Sealing device for preventing leakage of pressurized medium...

D - Textiles, Paper

21

D

277/11, 92/43

D21D 1/30 (2006.01) F16J 15/40 (2006.01)

Patent

CA 1057987

ABSTRACT OF THE DISCLOSURE Sealing device for preventing leakage of pressurized medium form the housing of a defibrator, refiner and the like, in which lignocellulosic pulp material is ground between two grinding discs, one of which is mounted on a drive shaft to rotate relative to the other with the pressurized housing. The sealing device comprises a pump having a stationary housing sealed to the defibrator hous- ing and spaced from the drive shaft to define a gap extending into the interior of the defibrator housing. The pump impellers are mounted to rotate with the drive shaft to pump a sealing fluid to a pressure higher than that prevailing within the defibrator hous- ing and propel the thus pressurized fluid through the gap into the defibrator housing to thereby prevent leakage of the pressur- ized medium through the drive shaft opening in the defibrator housing.

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