公开(公告)号：US11073031B2

公开(公告)日：2021-07-27

申请号：US16234047

申请日：2018-12-27

Applicant: ROLLS-ROYCE plc

Inventor： Michael P. Keenan

IPC: F01D5/30 ,  F01D5/14 ,  F04D29/32

Abstract: There is disclosed a blade for a gas turbine engine comprising an asymmetrical blade root.

公开(公告)号：US10598048B2

公开(公告)日：2020-03-24

申请号：US15954746

申请日：2018-04-17

Applicant: ROLLS-ROYCE plc

Inventor： Michael P. Keenan ,  Stewart T. Thornton

IPC: F01D25/36 ,  F01D15/10 ,  F02C7/18

Abstract: There is disclosed an auxiliary rotation device 28 for a gas turbine engine 10. The auxiliary rotation device 28 comprises: an electric machine 30 configured to be coupled to a rotor of the gas turbine engine 10; and a dedicated electrical storage device 32 coupled to the electric machine 30. During a period of powered operation of the gas turbine engine 10 the electric machine 30 is configured to act as a generator so as to charge the dedicated electrical storage device 32. Following the period of powered operation of the gas turbine engine 10 the electric machine 30 is configured to act as a motor by discharging the dedicated electrical storage device 32 so as to cause the rotor to rotate for a period of time to provide even cooling of the rotor around its circumference. There is also disclosed a method of cooling a rotor of a gas turbine engine 10 using an auxiliary rotation device 28.

公开(公告)号：US10352187B2

公开(公告)日：2019-07-16

申请号：US15669358

申请日：2017-08-04

Applicant: ROLLS-ROYCE plc

Inventor： Michael P. Keenan

IPC: F01D17/16 ,  F01D9/04

Abstract: A variable vane mechanism for adjusting the angle of stator vanes in a gas turbine engine is provided. The mechanism includes a circumferentially extending unison ring that is driven circumferentially around a casing by an actuator. The unison ring is connected to the stator vanes via levers such that the angle of the vanes changes with circumferential movement of the unison ring. The unison ring and the casing are each provided with at least one rigging hole in order to set the initial angle of the vanes. At least one of the unison ring and the casing are each provided with at least two rigging holes, so that the initial angle of the vanes can be adjusted by selecting different combinations of rigging holes. This may allow accumulations in tolerances to be compensated for and/or may allow the engine to be tested at different initial vane angles.