The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2020
Filed:
Apr. 17, 2018
Rolls-royce Plc, London, GB;
Michael P. Keenan, Sheffield, GB;
Stewart T. Thornton, Derby, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
There is disclosed an auxiliary rotation devicefor a gas turbine engine. The auxiliary rotation devicecomprises: an electric machineconfigured to be coupled to a rotor of the gas turbine engine; and a dedicated electrical storage devicecoupled to the electric machine. During a period of powered operation of the gas turbine enginethe electric machineis configured to act as a generator so as to charge the dedicated electrical storage device. Following the period of powered operation of the gas turbine enginethe electric machineis configured to act as a motor by discharging the dedicated electrical storage deviceso 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 engineusing an auxiliary rotation device