Mechanism for sealing a rotating shaft from load end leakage

Details Mechanism for sealing a rotating shaft from load end leakage Mechanism for sealing a rotating shaft from load end leakage

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/54 (2006.01) F04B 39/12 (2006.01) F04B 53/16 (2006.01) F16J 15/34 (2006.01)

Patent

CA 2466434

A sealing mechanism to prevent leakage out of a pump along the shaft to the motor, has the shaft running through an adaptor housing which connects the motor to the pump; a primary shaft seal at the pump end of the adaptor housing and a secondary seal at the motor end; the secondary seal has an energization source for seal pressure that is radially displaced from the seal faces; a seal leakage outlet at the lowest point in the adaptor hauling provides gravity drainage of leaking material; the outlet has a large cross section area relative to the cross section area of the leaf; path annulus of the primary seal so the secondary seal has a pressure rating less than primary seal pressure; the bearing assembly, adaptor housing, shaft, seals and pump in combination have a shaft overhang L3/D4 ratio of less than 50.

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