Multi-thickness film layer bearing cartridge and housing
AssigneeHoneywell International Inc.
InventorPeter Mavrosakis
Life of this patent
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Abstract
An exemplary housing for a rotor of a turbocharger includes a bore, defined at least in part by the housing; a pair of rotor limiting surfaces positioned at a first diameter, one rotor limiting surface positioned proximate to a turbine end of the housing and the other rotor limiting surface positioned proximate to a compressor end of the housing; a rotor damping surface positioned at a second diameter, intermediate the pair of rotor limiting surfaces; and an opening to receive a pin to axially locate a squeeze film bearing cartridge in the bore of the housing. Various exemplary bearing cartridges, housings, assemblies, etc., are also disclosed.
Claims20
A housing for a squeeze film bearing cartridge rotor for a turbocharger comprising:
- a bore defined at least in part by the housing;
- a center axis that extends along the bore from a turbine end of the housing to a compressor end of the housing;
- a pair of rotor limiting surfaces positioned at a first diameter, one rotor limiting surface positioned proximate to the turbine end of the housing and the other rotor limiting surface positioned proximate to the compressor end of the housing;
- a rotor damping surface positioned at a second diameter, intermediate the pair of rotor limiting surfaces;
- and
- an opening to receive a pin to axially locate a squeeze film bearing cartridge in the bore of the housing.
A housing for a squeeze film bearing cartridge rotor for a turbocharger comprising:
- a bore at least partially defined by the housing;
- a center axis that extends along the bore from a turbine end of the housing to a compressor end of the housing;
- a pair of rotor limiting surfaces at a first diameter, one rotor limiting surface positioned proximate to the turbine end of the housing and the other rotor limiting surface positioned proximate to the compressor end of the housing;
- and
- a pair of rotor damping surfaces disposed at a second diameter, the pair of rotor damping surfaces positioned intermediate the pair of rotor limiting surfaces wherein the second diameter exceeds the first diameter.
An assembly comprising:
- a housing that comprises
- a bore at least partially defined by the housing;
- a center axis that extends along the bore from a turbine end of the housing to a compressor end of the housing;
- a rotor limiting surface having a first diameter,
- a rotor damping surface having a second diameter,
- a transition positioned between the rotor limiting surface and the rotor damping surface, and
- an opening capable of receiving a locating pin;
- a rotor that comprises a squeeze film bearing cartridge positioned in the bore of the housing, the bearing cartridge having a longitudinal axis substantially aligned with the center axis of the housing and comprising an opening to receive the locating pin to axially locate the bearing in the housing;
- a rotor limiting film region bound radially by an outer surface of the bearing cartridge and the rotor limiting surface of the housing;
- and
- a rotor damping film region bound radially by an outer surface of the bearing cartridge and the rotor damping surface of the housing;
- wherein the rotor damping film region has a radial thickness that exceeds the radial thickness of the rotor limiting film region, wherein the rotor limiting film region acts to minimize radial freedom of the bearing cartridge in the bore, and wherein the rotor damping film region acts to dampen imbalance forces of the bearing cartridge in the bore.
Dependencies are inferred from the claim text.