Patents by Inventor Andrew Elliot ROACH

Andrew Elliot ROACH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Shaft shear detection in gas turbine engines
    Patent number: 10180078
    Abstract: There is described herein methods and systems for detecting a shaft event, such as a shaft shear, a shaft decoupling, and/or a shaft failure in a gas turbine engine. The method comprises determining a detection threshold as a set of threshold values for a spool speed of a first spool of the engine and a load transfer through a shaft of a second spool of the engine different from the first spool, the set of threshold values varying throughout a flight envelope, the detection threshold defining, for each spool speed value, at least one load transfer value beyond which a shaft event is detected. Operation values of the spool speed and the load transfer are obtained during operation of the engine, and the operation values are compared to the detection threshold. The shaft event is detected when the operation values are below the detection threshold.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: January 15, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Andrew Elliot Roach, Zubair Ahmad, Ryan John Perera
  • SHAFT SHEAR DETECTION IN GAS TURBINE ENGINES
    Publication number: 20180045071
    Abstract: There is described herein methods and systems for detecting a shaft event, such as a shaft shear, a shaft decoupling, and/or a shaft failure in a gas turbine engine. The method comprises determining a detection threshold as a set of threshold values for a spool speed of a first spool of the engine and a load transfer through a shaft of a second spool of the engine different from the first spool, the set of threshold values varying throughout a flight envelope, the detection threshold defining, for each spool speed value, at least one load transfer value beyond which a shaft event is detected. Operation values of the spool speed and the load transfer are obtained during operation of the engine, and the operation values are compared to the detection threshold. The shaft event is detected when the operation values are below the detection threshold.
    Type: Application
    Filed: November 25, 2016
    Publication date: February 15, 2018
    Inventors: Andrew Elliot ROACH, Zubair AHMAD, Ryan John PERERA