Patent ID: 7871248
Filing Date: 2011-01-18
Classification: F01D,F02C,F05D,Y10T

Abstract:
1. An aircraft lubrication supply system, comprising: a motor coupled to be selectively energized from a power bus and operable, upon being energized, to rotate at a rotational speed and supply a drive force; a pump having at least a fluid inlet and a fluid outlet, the pump coupled to receive the drive force from the motor and configured, in response thereto, to draw fluid from a fluid source into the fluid inlet and supply the fluid, via the fluid outlet, to a rotating machine; a control valve coupled to the fluid inlet, the control valve movable between at least a first position, in which the control valve fluidly communicates the fluid inlet with a lubrication fluid source, and a second position, in which the control valve fluidly communicates the fluid inlet with a gaseous fluid source; and a motor control unit configured to couple to the power bus and to receive a machine shutdown signal, the machine shutdown signal indicating that the rotating machine is being shutdown, the motor control unit operable, upon receipt of the machine shutdown signal, to controllably energize the motor from the power bus to thereby control its rotational speed in accordance with a schedule that will displace at least a substantial volume of lubricant in the rotating machine with fluid from the gaseous fluid source.