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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 10934972 B1

PDFFull Text
Date of Patent:
Mar. 02, 2021

Filed:

Jul. 19, 2018

Stability margin and clearance control using power extraction and assist of a gas turbine engine

Applicant:

United Technologies Corporation, Farmington, CT (US);

Inventors:

Michael Hrach, West Hartford, CT (US);

Michael M. Romero, Manchester, CT (US);

Assignee:

RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US);

Attorney:

Snell & Wilmer L.L.P.

Primary Examiner:

Kenneth J Hansen

Assistant Examiner:

Behnoush Haghighian

Int. Cl.
CPC ...
F02C 7/32 (2006.01); F02K 5/00 (2006.01); F01D 11/16 (2006.01); F01D 13/00 (2006.01); F02C 3/04 (2006.01); F02K 3/06 (2006.01); F01D 17/02 (2006.01); F02C 7/36 (2006.01); F02C 7/275 (2006.01); F01D 11/20 (2006.01); F01D 15/10 (2006.01); F01D 11/22 (2006.01);
U.S. Cl.
CPC ...
F02K 5/00 (2013.01); F01D 11/16 (2013.01); F01D 13/00 (2013.01); F02C 3/04 (2013.01); F02K 3/06 (2013.01); F01D 11/20 (2013.01); F01D 11/22 (2013.01); F01D 15/10 (2013.01); F01D 17/02 (2013.01); F02C 7/275 (2013.01); F02C 7/32 (2013.01); F02C 7/36 (2013.01); F05D 2220/32 (2013.01); F05D 2220/76 (2013.01); F05D 2260/80 (2013.01); F05D 2270/102 (2013.01); F05D 2270/301 (2013.01); F05D 2270/304 (2013.01);
Abstract

A method of maintaining rotor tip clearance and compressor operational line during a transient operation of a gas turbine engine is disclosed. In various embodiments, the method includes applying high spool auxiliary power to a high speed spool for a first time period, applying low spool auxiliary power to a low speed spool for a second time period, sensing one or more operational parameters of the gas turbine engine during the transient operation, and ceasing application of power to the high speed spool, based on the one or more operational parameters.

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