Compact accessory systems for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-2018372004-A1
Application number	US-201816057507-A
Country	US
Kind code	A1
Filing date	Aug 7, 2018
Priority date	Feb 3, 2016
Publication date	Dec 27, 2018
Grant date	—

Abstract

An accessory system for a gas turbine engine having a driveshaft with an axis of rotation is provided. The accessory system includes a towershaft coupled to the driveshaft and driven by the driveshaft along a towershaft axis of rotation. The accessory system also includes a shaft including a first shaft bevel gear coupled to a towershaft bevel gear. The shaft is rotatable by the towershaft along a shaft axis of rotation. The shaft axis of rotation is transverse to the towershaft axis of rotation. The accessory system includes a first accessory drive shaft having a first accessory bevel gear driven by the shaft. The accessory system also includes a second accessory drive shaft having a second accessory bevel gear driven by the shaft. A first accessory axis of rotation and a second accessory axis of rotation are substantially transverse to the shaft axis of rotation.

First claim

What is claimed is:

1 . An accessory system for a gas turbine engine having a driveshaft with an axis of rotation, the accessory system comprising:
a towershaft coupled to the driveshaft and driven by the driveshaft along a towershaft axis of rotation transverse to the axis of rotation of the gas turbine engine, the towershaft including a towershaft bevel gear at a distal end; a shaft including a first shaft bevel gear coupled to the towershaft bevel gear, the shaft rotatable by the towershaft along a shaft axis of rotation, the shaft axis of rotation transverse to the towershaft axis of rotation and substantially parallel to the axis of rotation of the gas turbine engine; a first accessory drive shaft having a first accessory bevel gear driven by the shaft, the first accessory drive shaft having a first accessory axis of rotation; and a second accessory drive shaft having a second accessory bevel gear driven by the shaft, the second accessory drive shaft having a second accessory axis of rotation, each of the first accessory axis of rotation and the second accessory axis of rotation substantially transverse to the shaft axis of rotation, and the secondary accessory axis of rotation and the first accessory axis of rotation are substantially transverse to each other.

2 . The accessory system of claim 1 , further comprising:
a third accessory drive shaft having a third accessory bevel gear driven by the first accessory bevel gear, the third accessory drive shaft having a third accessory axis of rotation, the third accessory axis of rotation substantially transverse to the shaft axis of rotation and the first accessory axis of rotation, and the third accessory axis of rotation and the second accessory axis of rotation are substantially transverse to each other.

3 . The accessory system of claim 2 , further comprising:
a fourth accessory drive shaft having a fourth accessory bevel gear driven by the third accessory bevel gear, the fourth accessory drive shaft having a fourth accessory axis of rotation substantially parallel to the shaft axis of rotation.

4 . The accessory system of claim 3 , further comprising:
a fifth accessory drive shaft having a fifth accessory bevel gear driven by the fourth accessory bevel gear, the fifth accessory drive shaft having a fifth accessory axis of rotation substantially transverse to the shaft axis of rotation and substantially transverse to the second accessory axis of rotation.

5 . The accessory system of claim 4 , wherein the first accessory axis of rotation, the second accessory axis of rotation, the third accessory axis of rotation and the fifth accessory axis of rotation intersect at a single point along the shaft axis of rotation.

6 . The accessory system of claim 1 , wherein the shaft includes the first shaft bevel gear spaced apart from a second shaft bevel gear, and a third shaft bevel gear spaced apart from the second shaft bevel gear, the second shaft bevel gear drives the first accessory bevel gear and the third shaft bevel gear drives the second accessory bevel gear.

7 . The accessory system of claim 1 , further comprising:
a face gear set having a face gear driven by the shaft and a bevel gear driven by the face gear, the first accessory drive shaft driven by the face gear and the second accessory drive shaft driven by the bevel gear.

8 . The accessory system of claim 7 , wherein the bevel gear includes a face defining a plurality of bevel gear teeth that faces a portion of the face gear.

9 . The accessory system of claim 8 , wherein the bevel gear is coupled inboard of the face gear, and the plurality of bevel gear teeth of the bevel gear extend about an entirety of the face of the bevel gear.

10 . The accessory system of claim 8 , wherein the bevel gear is fixedly coupled to the face gear.

11 . An accessory system for a gas turbine engine having a driveshaft with an axis of rotation, the accessory system comprising:
a towershaft coupled to the driveshaft and driven by the driveshaft along a towershaft axis of rotation transverse to the axis of rotation of the gas turbine engine, the towershaft including a towershaft bevel gear at a distal end; a shaft including a first shaft bevel gear coupled to the towershaft bevel gear, the shaft rotatable by the towershaft along a shaft axis of rotation, the shaft axis of rotation transverse to the towershaft axis of rotation and substantially parallel to the axis of rotation of the gas turbine engine; a first accessory drive shaft having a first accessory bevel gear driven by the shaft, the first accessory drive shaft having a first accessory axis of rotation; a second accessory drive shaft having a second accessory bevel gear driven by the shaft, the second accessory drive shaft having a second accessory axis of rotation, each of the first accessory axis of rotation and the second accessory axis of rotation substantially transverse to the shaft axis of rotation, and the secondary accessory axis of rotation and the first accessory axis of rotation are substantially transverse to each other; and a third accessory drive shaft having a third accessory bevel gear driven by the first accessory bevel gear, the third accessory drive shaft having a third accessory axis of rotation, the third accessory axis of rotation substantially transverse to the shaft axis of rotation and the first accessory axis of rotation, and the third accessory axis of rotation and the second accessory axis of rotation are substantially transverse to each other.

12 . The accessory system of claim 11 , further comprising:
a fourth accessory drive shaft having a fourth accessory bevel gear driven by the third accessory bevel gear, the fourth accessory drive shaft having a fourth accessory axis of rotation substantially parallel to the shaft axis of rotation.

13 . The accessory system of claim 12 , further comprising:
a fifth accessory drive shaft having a fifth accessory bevel gear driven by the fourth accessory bevel gear, the fifth accessory drive shaft having a fifth accessory axis of rotation substantially transverse to the shaft axis of rotation and substantially transverse to the second accessory axis of rotation.

14 . The accessory system of claim 13 , wherein the first accessory axis of rotation, the second accessory axis of rotation, the third accessory axis of rotation and the fifth accessory axis of rotation intersect at a single point along the shaft axis of rotation.

15 . The accessory system of claim 11 , wherein the shaft includes the first shaft bevel gear spaced apart from a second shaft bevel gear, and a third shaft bevel gear spaced apart from the second shaft bevel gear, the second shaft bevel gear drives the first accessory bevel gear and the third shaft bevel gear drives the second accessory bevel gear.

16 . An accessory system for a gas turbine engine having a driveshaft with an axis of rotation, the accessory system comprising:
a towershaft coupled to the driveshaft and driven by the driveshaft along a towershaft axis of rotation transverse to the axis of rotation of the gas turbine engine, the towershaft including a towershaft bevel gear at a distal end; a shaft including a first shaft bevel gear coupled to the towershaft bevel gear, the shaft rotatable by the towershaft along a shaft axis of rotation, the shaft axis of rotation transverse to the towershaft axis of rotation and substantially parallel to the axis of rotation of the gas turbine engine; a first accessory drive shaft having a first accessory bevel gear driven by the shaft, the first accessory drive shaft having a fi

Assignees

• Honeywell Int Inc

Inventors

• Alstad Shawn
• Dobosz Tomasz
• Chavez Rocio

Classifications

• F16H1/222

  with non-parallel axes · CPC title

• F05D2260/4031

  as in toothed gearing · CPC title

• B64C27/14

  Direct drive between power plant and rotor hub · CPC title

• B64D41/00

  Power installations for auxiliary purposes · CPC title

• F02C7/32 Primary

  Arrangement, mounting, or driving, of auxiliaries · CPC title