Lubrication of windmilling journal bearings

Details Lubrication of windmilling journal bearings Lubrication of windmilling journal bearings

2006-10-18

2010-02-16

Lewis, Tisha D (Department: 3655)

Planetary gear transmission systems or components

With lubricaton

C475S331000, C184S004000, C184S006110, C184S006120, C184S027200

Reexamination Certificate

active

07662059

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.

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patent: 58008849 (1983-01-01), None
Translation of JP 58008849.

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