Additive manufactured gear for a geared architecture gas turbine engine

Patent metadata

Field	Value
Publication number	US-2016298751-A1
Application number	US-201514682390-A
Country	US
Kind code	A1
Filing date	Apr 9, 2015
Priority date	Apr 9, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

A gear includes a multiple of gear teeth that extend from an outer portion of a rim about an axis and an inner portion of the rim about the axis, the inner portion of the rim additive manufactured.

First claim

What is claimed is:

1 . A gear, comprising:
a multiple of gear teeth that extend from an outer portion of a rim about an axis; and an inner portion of said rim about said axis, said inner portion of said rim additive manufactured.

2 . The gear as recited in claim 1 , wherein said inner portion of said rim forms an journal bearing surface.

3 . The gear as recited in claim 2 , wherein said gear is an intermediate gear of a geared architecture for a gas turbine engine.

4 . The gear as recited in claim 3 , wherein said geared architecture includes a planetary gear system.

5 . The gear as recited in claim 3 , wherein said geared architecture includes a star gear system.

6 . The gear as recited in claim 1 , wherein said inner portion of said rim includes a matrix.

7 . The gear as recited in claim 6 , wherein said matrix forms a lattice structure.

8 . The gear as recited in claim 1 , wherein said gear is an intermediate gear of a geared architecture for a gas turbine engine, said intermediate gear is a double helical gear.

9 . The gear as recited in claim 1 , wherein said inner portion provides different characteristics along an axial length.

10 . A geared architecture for a gas turbine engine, said geared architecture, comprising:
a sun gear; a ring gear that surrounds said sun gear; and a multiple of intermediate gears in meshing engagement with said sun gear and said ring gear, each of said multiple of intermediate gears including an inner portion of a rim, said inner portion of said rim being additive manufactured.

11 . The geared architecture as recited in claim 10 , wherein an outer portion of said rim includes a multiple of gear teeth, said gear teeth manufactured via subtractive manufacturing.

12 . The geared architecture as recited in claim 11 , wherein said inner portion of said rim forms an inner periphery.

13 . The geared architecture as recited in claim 12 , further comprising an interface between said inner portion of said rim and said outer portion of said rim.

14 . The geared architecture as recited in claim 10 , wherein said interface is a bond layer.

15 . The geared architecture as recited in claim 10 , wherein said inner portion of said rim forms a matrix.

16 . The geared architecture as recited in claim 10 , wherein each of said multiple of intermediate gears is a double helical gear.

17 . The geared architecture as recited in claim 16 , wherein said inner portion provides different characteristics along an axial length.

18 . A method of manufacturing gear, comprising:
subtractive manufacturing a multiple of gear teeth from and an outer portion of a rim; and additive manufacturing an inner portion of the rim.

19 . The method as recited in claim 18 , further comprising additive manufacturing the inner portion of the rim as a matrix structure.

20 . The method as recited in claim 19 , further comprising additive manufacturing the inner portion of the rim to provide different characteristics along an axial length.

Assignees

• United Technologies Corp

Inventors

• Mccune Michael E

Classifications

• B22F5/085 Primary

  with helical contours · CPC title

• F16H55/17 Primary

  Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• F16H1/28

  with gears having orbital motion · CPC title