Title:
OVER SPEED MONITORING USING A FAN DRIVE GEAR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/047468
Kind Code:
A3
Abstract:
A control system for turbofan engine includes a first sensor measuring rotation of a first shaft at a first location and a fan shaft sensor measuring a speed of a fan shaft. A controller utilizes measurements of a first speed of the first shaft from the first sensor and a second speed of the fan shaft driven by a geared architecture and rotating at a speed different than the first shaft. The controller determines that one of the first shaft and the fan shaft are outside predetermined deformation limits responsive to a difference between an actual difference between the first and second speeds and a calculated expected difference between speeds of the first shaft and the fan shaft.
Inventors:
OTTO JOHN R (US)
Application Number:
PCT/US2014/042029
Publication Date:
June 18, 2015
Filing Date:
June 12, 2014
Export Citation:
Assignee:
UNITED TECHNOLOGIES CORP (US)
International Classes:
F02C7/32; F02C9/00; F02C9/16; G01P3/00
Foreign References:
| US20130054175A1 | 2013-02-28 | |||
| US6321525B1 | 2001-11-27 | |||
| US20050129498A1 | 2005-06-16 | |||
| US20100011740A1 | 2010-01-21 | |||
| US20080317588A1 | 2008-12-25 |
Other References:
See also references of EP 3014089A4
Attorney, Agent or Firm:
SIRAGUSA, John M. (Gaskey & Olds P.C./Pratt & Whitney,400 W. Maple, Suite 35, Birmingham MI, US)
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