Helical inner diameter groove journal bearing
AssigneeHoneywell International Inc.
InventorDaniel A. Gutknecht
Life of this patent
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Abstract
An exemplary bearing assembly includes a turbine side journal bearing with helical grooves along an inner journal surface where each helical groove includes a lubricant opening and opposing arms where each arm terminates at a respective axial surface of the journal bearing; a compressor side journal bearing with helical grooves along an inner journal surface where each helical groove includes a lubricant opening and opposing arms where each arm terminates at a respective axial surface of the journal bearing; and a spacer to space the turbine side journal bearing and the compressor side journal bearing along an axis. Various other exemplary devices, systems, methods, etc., are also disclosed.
Claims16
A bearing assembly for a turbocharger comprising:
- a turbine side journal bearing, semi- or fully floating, that comprises helical grooves along an inner journal surface wherein each helical groove comprises a lubricant opening, a well that spans the opening and opposing arms offset from the opening and extending from the well wherein each arm terminates at a respective axial surface of the journal bearing and wherein well depth exceeds arm depth of each arm where each arm terminates;
- a compressor side journal bearing, semi- or fully floating, that comprises helical grooves along an inner journal surface wherein each helical groove comprises a lubricant opening, a well that spans the opening and opposing arms offset from the opening and extending from the well wherein each arm terminates at a respective axial surface of the journal bearing and wherein well depth exceeds arm depth of each arm where each arm terminates;
- and
- a spacer to space the turbine side journal bearing and the compressor side journal bearing along an axis.
A unitary semi- or fully floating bearing for a turbocharger comprising:
- a turbine side journal bearing section that comprises helical grooves along an inner journal surface wherein each helical groove comprises a lubricant opening, a well that spans the opening and opposing arms offset from the opening and extending from the well wherein each arm terminates at a respective axial surface of the journal bearing section and wherein well depth exceeds arm depth of each arm where each arm terminates;
- a compressor side journal bearing section that comprises helical grooves along an inner journal surface wherein each helical groove comprises a lubricant opening, a well that spans the opening and opposing arms offset from the opening and extending from the well wherein each arm terminates at a respective axial surface of the journal bearing section and wherein well depth exceeds arm depth of each arm where each arm terminates;
- and
- a spacer section disposed between the turbine side journal bearing section and the compressor side journal bearing section.
Dependencies are inferred from the claim text.