Patent ID: 6803688
Filing Date: 2004-10-12
Classification: F16C,H02K

Abstract:
In an electrical generator having a generator housing, a wall at one end of the housing, a rotor within the generator housing and extending through said wall, a fan within the housing for applying a high pressure suction to cool the rotor, and a bearing housing including a bearing for supporting the rotor adjacent said one end of the generator housing and lying partially within the generator housing at generator fan high suction pressure and partially outside the generator housing at ambient pressure with the end wall located axially between opposite ends of the bearing housing, a method of minimizing or eliminating oil leakage from the bearing housing into the generator housing comprising the steps of:isolating the bearing housing from the high suction pressure of the generator fan by retrofitting a seal between (i) the rotor adjacent said one end thereof and at a location axially inwardly of the bearing and (ii) the end wall thereby exposing the entirety of the bearing housing to ambient pressure.