JOURNAL PIN OIL SUPPLY FOR GEAR SYSTEM
First Claim
1. A journal pin comprising:
- a generally cylindrical body disposed about an axis having a supply passage;
a first chamber and a second chamber disposed in the generally cylindrical body in fluid communication with the supply passage; and
a recess on an outer diameter of the cylindrical body in fluid communication with the first chamber and the second chamber, wherein the first chamber and second chamber are each radially outward of the supply passage and include an outlet to the recess, each of the first chamber and second chamber having a first section radially inward of a second section, wherein a cross sectional area of the second section is greater than a cross sectional area of the corresponding first section.
4 Assignments
0 Petitions
Accused Products
Abstract
An example journal pin includes a generally cylindrical body disposed on an axis having a supply passage. A first chamber and a second chamber are disposed in the generally cylindrical body and are in fluid communication with the supply passage. A recess on an outer diameter of the cylindrical body is in fluid communication with the first chamber and the second chamber. The first chamber and second chamber are each radially outward of the supply passage and including an outlet to the recess. The first chamber and second chamber each have a first section radially inward of a second section. A cross sectional area of the second section is greater than a cross sectional area of the corresponding first section.
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Citations
20 Claims
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1. A journal pin comprising:
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a generally cylindrical body disposed about an axis having a supply passage; a first chamber and a second chamber disposed in the generally cylindrical body in fluid communication with the supply passage; and a recess on an outer diameter of the cylindrical body in fluid communication with the first chamber and the second chamber, wherein the first chamber and second chamber are each radially outward of the supply passage and include an outlet to the recess, each of the first chamber and second chamber having a first section radially inward of a second section, wherein a cross sectional area of the second section is greater than a cross sectional area of the corresponding first section. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A turbomachine epicyclic gear system comprising:
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a sun gear rotatable around an axis; a ring gear radially outward of the sun gear; a plurality of intermediate gears meshed with the sun gear and the ring gear; and a plurality of journal pins each configured to support one of the plurality of intermediate gears, each of the plurality of journal pins having a supply passage in fluid communication with a recess disposed on the outer circumference of each journal pin through a first chamber and a second chamber disposed in each of the plurality of journal pins, wherein the first chamber and second chamber are each radially outward of the supply passage and have an outlet to the recess, each of the first chamber and second chamber having a first section radially inward of a second section, wherein a cross sectional area of the second section is greater than a cross sectional area of the corresponding first section. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for assembling an epicyclic gear system in a turbomachine comprising:
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supporting a first intermediate gear with a journal pin having a supply passage in fluid communication with a recess through a first chamber and a second chamber disposed in the journal pin, wherein the first chamber and second chamber are each radially outward of the supply passage, each of the first chamber and second chamber having a first section radially inward of a second section, wherein a cross sectional area of the second section is greater than a cross sectional area of the corresponding first section; and orienting the journal pin such that the recess is circumferentially offset from a load plane of the journal pin. - View Dependent Claims (18, 19, 20)
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Specification