Invention Grant
- Patent Title: Lubrication of windmilling journal bearings
- Patent Title (中): 风车轴颈轴承润滑
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Application No.: US12631162Application Date: 2009-12-04
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Publication No.: US07883438B2Publication Date: 2011-02-08
- Inventor: Michael E. McCune
- Applicant: Michael E. McCune
- Applicant Address: US CT Hartford
- Assignee: United Technologies Corporation
- Current Assignee: United Technologies Corporation
- Current Assignee Address: US CT Hartford
- Agency: Carlson, Gaskey & Olds, P.C.
- Main IPC: F16H57/04
- IPC: F16H57/04 ; F16H57/08 ; F16N1/00 ; F01D25/18

Abstract:
A support shaft provides lubrication to a journal bearing during windmilling operation of a gear set. A primary oil pump provides oil from an oil supply during driven operation of the fan, and a secondary oil pump provides oil from an internal sump during windmilling operation of the fan. During driven operation of the fan, oil is pumped with the primary oil pump through a primary oil flow path to an outer surface of the support shaft. During windmilling fan operation, oil is pumped from an internal sump with a secondary oil pump through the secondary oil flow path. The secondary oil flow path has a smaller flow capacity, and the secondary oil pump is a smaller capacity pump.
Public/Granted literature
- US20100086403A1 LUBRICATION OF WINDMILLING JOURNAL BEARINGS Public/Granted day:2010-04-08
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