Patent ID: 11920605
Assignee: BORGWARNER INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 0:
1. A rotating machine comprising:
a bearing housing defining a bearing housing interior;
a shaft extending along an axis between a first end and a second end spaced from said first end along said axis, with said shaft disposed in said bearing housing interior;
an impeller housing coupled to said bearing housing, with said impeller housing defining an impeller housing interior;
an impeller wheel coupled to said shaft at said first end and disposed in said impeller housing interior;
a seal assembly disposed in said bearing housing interior and comprising,
a carbon ring disposed about said shaft and spaced from said impeller wheel along said axis, with said carbon ring having a carbon surface, and
a mating ring disposed about said shaft and spaced from said impeller wheel along said axis such that said carbon ring is disposed between said impeller wheel and said mating ring, with said mating ring having a mating surface facing and configured to contact said carbon surface;

a lubricant-fed bearing disposed in said bearing housing interior and rotatably supporting said shaft at said first end, with said seal assembly disposed between said lubricant-fed bearing and said impeller wheel with respect to said axis; and
an electric machine comprising a rotor rotatably coupled to said shaft, and a stator disposed about said rotor;
wherein said impeller housing interior is adapted to be fluidly coupled to a contaminant free environment, with said carbon ring and said mating ring reducing lubricant from entering the contaminant free environment.