Journal bearing for use in epicyclical gearbox and method of facilitating hydrodynamic oil flow in the journal bearing
First Claim
1. A journal bearing for use in an epicyclical gearbox, the journal bearing, comprising:
- a non-circular shaped journal pin; and
a journal bearing body into which the non-circular shaped journal pin is disposed,wherein the non-circular shaped journal pin mimics the shape of the journal bearing body at least at a high pressure point exerted upon the journal bearing body during a high pressure event, thereby permitting a free flow of a lubricating fluid there between the non-circular shaped journal pin and the journal bearing body during the high pressure event.
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Accused Products
Abstract
A journal bearing for use in an epicyclical gearbox including a non-circular shaped journal pin and a journal bearing body into which the non-circular shaped journal pin is disposed. The non-circular shaped journal pin configured to mimic the shape of the non-cylindrical shaped journal bearing body at least at a high pressure point exerted upon the non-cylindrical shaped journal bearing body during a high pressure event, thereby permitting a free flow of a lubricating fluid there between the non-circular shaped journal pin and the journal bearing body during the high pressure event. An epicyclical gearbox including the journal bearing and method of facilitating a hydrodynamic oil flow in the planet gear journal bearing.
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Citations
20 Claims
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1. A journal bearing for use in an epicyclical gearbox, the journal bearing, comprising:
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a non-circular shaped journal pin; and a journal bearing body into which the non-circular shaped journal pin is disposed, wherein the non-circular shaped journal pin mimics the shape of the journal bearing body at least at a high pressure point exerted upon the journal bearing body during a high pressure event, thereby permitting a free flow of a lubricating fluid there between the non-circular shaped journal pin and the journal bearing body during the high pressure event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An epicyclical gearbox, comprising:
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a sun gear; a plurality of planet gears positioned about the sun gear and in meshing relationship therewith; a plurality of journal bearings, each rotatably supporting one of the plurality of planet gears, each of the plurality of journal bearings configured to include a journal bearing body having a fixed arc shape and subject to deformation under a high pressure event and a non-circular journal pin disposed at least partially within the journal bearing body; and a planet carrier configured in fixed relationship with each of the plurality of non-circular journal pins, wherein each of the plurality of non-circular journal pins is configured to mimic the fixed arc shape of each journal bearing body thereby permitting a free flow of a lubricating fluid there between during the high pressure event. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of facilitating a hydrodynamic oil flow in a planet gear journal bearing, the method comprising:
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providing a fixed arc journal bearing body; disposing a non-cylindrical shaped journal pin proximate the fixed arc journal bearing body; and providing an input lubricating fluid flow within the fixed arc journal bearing body, wherein the non-circular shaped journal pin is configured to mimic the shape of the fixed arc journal bearing body at least at a high pressure point exerted upon the fixed arc journal bearing body during a high pressure event, thereby permitting a free flow of the input lubricating fluid there between the non-circular shaped journal pin and the fixed arc journal bearing body during the high pressure event. - View Dependent Claims (20)
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Specification