Mechanism for sealing a rotating shaft from load end leakage

Abstract From the Canadian patent

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 …