Journal bearing and method of facilitating hydrodynamic oil flow, load capacity and optimization of bearing performance
First Claim
1. A journal bearing for use in an epicyclical gearbox, the journal bearing, comprising:
- a journal bearing body having a fixed arc shaped and subject to deformation under a high pressure event;
a journal pin disposed in the journal bearing body; and
at least one lubricating fluid inlet,wherein the fluid inlet is configured to provide for an input of a lubricating fluid in a loaded arc portion proximate at least one 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 journal pin and the journal bearing body during the high pressure event.
1 Assignment
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Accused Products
Abstract
A journal bearing for use in an epicyclical gearbox including a journal pin, a journal bearing body into which the journal pin is disposed and at least one lubricating fluid inlet. The lubricating fluid inlet is configured to provide for an input of a lubricating fluid in a loaded arc portion proximate at least one 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 journal pin and the journal bearing body during the high pressure event. In an embodiment, the journal pin is configured to mimic 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. An epicyclical gearbox including the journal bearing and method of facilitating a hydrodynamic oil flow in the planet gear journal bearing.
49 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 journal bearing body having a fixed arc shaped and subject to deformation under a high pressure event; a journal pin disposed in the journal bearing body; and at least one lubricating fluid inlet, wherein the fluid inlet is configured to provide for an input of a lubricating fluid in a loaded arc portion proximate at least one 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 journal pin and the journal bearing body during the high pressure event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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, a journal pin disposed at least partially within the journal bearing body, and at least one lubricating fluid inlet; and a planet carrier configured in fixed relationship with each of the plurality of journal pins, wherein the at least one lubricating fluid inlet of each of the plurality of journal bearings is configured to provide for an input of a lubricating fluid in a loaded arc portion of the journal bearing body, proximate 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 journal pin and the journal bearing body during the high pressure event. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. 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 journal pin proximate the fixed arc journal bearing body; and providing an input lubricating fluid flow within the fixed arc journal bearing body at an lubricating fluid inlet, the lubricating fluid inlet configured to provide for the input of a lubricating fluid in a loaded arc portion of the journal bearing body, proximate 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 journal pin and the journal bearing body during the high pressure event. - View Dependent Claims (19, 20)
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Specification