Method for manufacturing a motoring system for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-11536199-B2
Application number	US-201916455935-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jul 5, 2016
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A method of manufacturing a motoring system for a gas turbine having the steps of: assembling a pinned mechanical fuse, the pinned mechanical fuse including at least one shear pin; forming an outer housing; installing a reduction gear train into the outer housing, the reduction gear train having an input and an output; operably connecting a motor to the input; operably connecting a clutch to the output using the pinned mechanical fuse, the clutch in operation engages and disengages the reduction gear train; operably connecting a starter to the clutch, the starter having an output shaft; and operably connecting an accessory gearbox to the output shaft of the starter. The clutch is operably connected to the accessory gearbox through the starter and the output shaft. The at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value.

First claim

What is claimed is:

1. A method of manufacturing a motoring system for a gas turbine engine, the method comprising:
assembling a pinned mechanical fuse, the pinned mechanical fuse including at least one shear pin;
forming an outer housing;
installing a reduction gear train into the outer housing, the reduction gear train having an input and an output;
operably connecting a motor to the input;
operably connecting a clutch to the output using the pinned mechanical fuse, the clutch in operation engages and disengages the reduction gear train;
operably connecting a starter to the clutch, the starter having an output shaft; and
operably connecting an accessory gearbox to the output shaft of the starter, wherein the clutch is operably connected to the accessory gearbox through the starter and the output shaft of the starter,
wherein the at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value.

2. The method of claim 1 , further comprising:
forming the at least one shear pin;
forming an outer sleeve having a first section, a second section, an inner chamber, an outer wall, and at least one through hole connecting the inner chamber to the outer wall within the first section;
forming an inner sleeve having a first portion, a second portion, an outer surface, and at least one blind hole located in the outer surface within the second portion;
inserting the second portion of the inner sleeve into the inner chamber of the outer sleeve;
inserting the at least one shear pin into the at least one through hole and at least one blind hole; and
securing the at least one shear pin in the at least one through hole and at least one blind hole.

3. The method of claim 2 , wherein:
the at least one shear pin is secured by a securing sleeve encircling the first section of the outer wall.

4. The method of claim 1 , wherein:
the selected value is about 64 foot-pounds (87 newton-meters).

5. The method of claim 2 , wherein:
the selected value is about 64 foot-pounds (87 newton-meters).

6. The method of claim 1 , wherein:
the pinned mechanical fuse comprises two shear pins.

7. The method of claim 2 , wherein:
the pinned mechanical fuse comprises two shear pins.

8. The method of claim 2 , wherein:
the second portion of the inner sleeve is elongated and has a cylindrical shape.

9. The method of claim 2 , wherein:
the second section of the outer sleeve is operably connected to the clutch; and
the first potion of the inner sleeve is operably connected to the output.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Slayter Matthew Allen
• Davis Richard Alan
• Fox Paul F
• Roberts Jeffrey Todd
• Brown Jeff A
• Nguyen James Vandung
• Harder Benjamin T
• Wilson Dwayne Leon
• Mcmasters Brian
• Walker Daniel Richard

Classifications

• B23P15/14

  gear parts, e.g. gear wheels · CPC title

• F05D2260/311

  of the frangible or shear type · CPC title

• F05D2230/60

  Assembly methods · CPC title

• F02C7/32

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

• F02C7/268 Primary

  Starting drives for the rotor {, acting directly on the rotor of the gas turbine to be started} · CPC title