公开(公告)号：US11187161B2

公开(公告)日：2021-11-30

申请号：US16798607

申请日：2020-02-24

Applicant: ROLLS-ROYCE plc

Inventor： Arthur L Rowe ,  Alexander MacDonald

IPC: F02C9/28 ,  F02C9/46

Abstract: A fuel flow control system is configured to perform a method including: setting a fuel flow demand proportional to compressor discharge pressure; detecting an actual fuel flow; and applying an enhanced schedule for fuel flow demand while fuel flow demand is less than a predefined proportion of actual fuel flow.

公开(公告)号：US10465554B2

公开(公告)日：2019-11-05

申请号：US14944619

申请日：2015-11-18

Applicant: ROLLS-ROYCE plc

Inventor： Alexander MacDonald

IPC: F01D21/04 ,  F01D21/02 ,  F01D5/02 ,  F01D21/00 ,  F02C9/46 ,  G01M15/14

Abstract: A method of detecting a shaft break in a turbine engine is provided. The shaft connects a torque-exerting turbine of the engine to a torque-receiving unit of the engine. The method includes: receiving repeated measurements of the rotational frequency of the torque-receiving unit and the rotational frequency measurements of the turbine; determining from the measurements an amount of shaft twist between the turbine and the torque-receiving unit; comparing the amount of twist with a threshold twist value; and signalling a shaft break when the amount of twist exceeds the threshold twist value and a pre-condition is met. The pre-condition includes determining from the measurements that the turbine rotational speed is greater than the simultaneous torque-receiving unit rotational speed by a threshold speed value.

公开(公告)号：US10605174B2

公开(公告)日：2020-03-31

申请号：US15403025

申请日：2017-01-10

Applicant: ROLLS-ROYCE plc

Inventor： Arthur L Rowe ,  Alexander MacDonald

IPC: F02C9/28 ,  F02C9/46

Abstract: A method (30) of controlling fuel flow in a gas turbine engine. First, detect a surge condition. Set fuel flow demand (Wf_D) proportional to compressor discharge pressure (P30). Detect actual fuel flow (Wf_A). Then apply an enhanced schedule (50) for fuel flow demand (Wf_D) while fuel flow demand (Wf_D) is less than a predefined proportion (k) of actual fuel flow (Wf_A). Also a gas turbine engine (10), fuel flow system (68) and fuel flow control system (76) each implementing the method (30).