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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.:

US 11352958 B1

PDFFull Text
Date of Patent:
Jun. 07, 2022

Filed:

May. 27, 2021

Aircraft gas turbine engine with improved response to rotor unbalance

Applicant:

Rolls-royce Plc, London, GB;

Inventors:

Matthew Silvester, Derby, GB;

Geoffrey Hughes, Bristol, GB;

Assignee:

ROLLS-ROYCE PLC, London, GB;

Attorney:

Oliff PLC

Primary Examiner:

Gerald L Sung

Assistant Examiner:

Jacek Lisowski

Int. Cl.
CPC ...
F02C 7/36 (2006.01); F04D 29/40 (2006.01); B64D 27/10 (2006.01); F02C 3/073 (2006.01); F04D 25/02 (2006.01); F02K 3/06 (2006.01);
U.S. Cl.
CPC ...
F02C 7/36 (2013.01); B64D 27/10 (2013.01); F02C 3/073 (2013.01); F02K 3/06 (2013.01); F04D 25/02 (2013.01); F04D 29/40 (2013.01); F05D 2220/323 (2013.01); F05D 2220/36 (2013.01); F05D 2260/4031 (2013.01); F05D 2260/96 (2013.01);
Abstract

An aircraft gas turbine engine includes a fan system having a reverse traveling wave first flap mode, Fan RTW, and including a fan upstream of the engine core; a fan shaft; and a front engine structure to support the shaft and having a front engine structure nodding mode FSN including two modes at similar, but unequal, natural frequencies in orthogonal directions; and a gearbox. The engine includes a gearbox, and a gearbox output shaft to couple output of the gearbox to the fan shaft. An LP rotor system including the fan system and the gearbox output shaft has a first reverse whirl rotor dynamic mode, Rotor RW. A frequency margin of: is in the range from 5 to 50%.

Find Patent Forward Citations

Silvester, Matthew. (2022). Aircraft gas turbine engine with improved response to rotor unbalance (U.S. Patent No. 11352958). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11352958

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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