Mechanical seal assembly with integral pumping device

Details Mechanical seal assembly with integral pumping device Mechanical seal assembly with integral pumping device

F - Mech Eng,Light,Heat,Weapons

16

J

277/44

F16J 15/16 (2006.01) F16J 15/34 (2006.01) F16J 15/40 (2006.01)

Patent

CA 1181779

MECHANICAL SEAL ASSEMBLY WITH INTEGRAL PUMPING DEVICE ABSTRACT A double or tandem mechanical seal construction having as an integral part thereof a pumping structure for effecting circulation of buffer fluid. The shaft sleeve is provided with surface irregularities thereon, such as a series of circumferentially spaced slots, so that the shaft sleeve functions as a pumping rotor. The surrounding seal stator has supply and discharge ports extending radially therethrough, which ports extend substantially tangentially with respect to the shaft sleeve so that the latter, due to its rotation, will effectively pump and hence circulate the cooling or buffer fluid through the buffer chamber.

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