Oil system
First Claim
1. An oil management system for a rotating machine capable of being operated in an inverted orientation for a predetermined maximum period of time, the oil system comprising an oil reservoir, a first pump for pumping oil from the oil reservoir to the rotating machine, a gravity drain into a sump and a scavenge pump for returning oil from the sump to the reservoir, wherein the supply of oil to the rotating machine is interrupted when the machine is in its inverted orientation.
2 Assignments
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Accused Products
Abstract
An oil system is provided for use with a rotating machine, for example an aircraft generator and associated transmission. The oil system allows the generator to be run without lubrication for a short period of time. Such a situation is likely to occur when the aircraft is inverted or experiences zero G conditions.
The oil system includes an oil reservoir that supplies oil to a first pump for supplying oil for lubricating and/or cooling the generator and for lubricating a variable transmission associated with the generator. The oil reservoir also supplies oil to a second pump that provides oil for operating hydraulic actuators for controlling the operation of the variable transmission. A return path is provided for the oil to the reservoir. The oil system further includes an oil fill inlet such that a single filling operation through the oil fill inlet causes oil to flow through the return path towards the reservoir causing air to be purged through the return path.
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Citations
14 Claims
- 1. An oil management system for a rotating machine capable of being operated in an inverted orientation for a predetermined maximum period of time, the oil system comprising an oil reservoir, a first pump for pumping oil from the oil reservoir to the rotating machine, a gravity drain into a sump and a scavenge pump for returning oil from the sump to the reservoir, wherein the supply of oil to the rotating machine is interrupted when the machine is in its inverted orientation.
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11. An oil system for an electrical generator, comprising:
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an oil reservoir supplying oil to a first pump for supplying oil to the generator and to a variable transmission associated with the generator, said oil reservoir also supplying oil to a second pump for providing oil for operating hydraulic actuators for controlling the operation of the variable transmission; and
a return path for the oil to the reservoir, the system further including an oil fill inlet wherein a single filling operation through the oil fill inlet causes oil to flow through the return path towards the reservoir thereby purging air through an oil cooler and the return path. - View Dependent Claims (12, 13, 14)
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Specification