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:
Jan. 17, 2017
Filed:
Mar. 24, 2014
Applicant:
Rolls-royce Plc, London, GB;
Inventor:
Leo Vivian Lewis, Kenilworth, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 11/20 (2006.01); F01D 11/24 (2006.01); G05B 15/02 (2006.01); G01N 25/16 (2006.01); F01D 11/18 (2006.01);
U.S. Cl.
CPC ...
F01D 11/24 (2013.01); F01D 11/18 (2013.01); F01D 11/20 (2013.01); G01N 25/16 (2013.01); G05B 15/02 (2013.01); F05D 2260/81 (2013.01); F05D 2270/44 (2013.01); F05D 2270/71 (2013.01);
Abstract
A method of characterizing mechanical and thermal growth of a rotor tip clearance arrangement and a method of controlling such an arrangement. The characterization method comprising constructing a finite element model and calibration cases; run the model for the calibration cases to obtain displacements; and calculating component growth therefrom. The growth is characterized and scaled for the operating conditions. The clearance is calculated in a time step from the growths and input to a control arrangement for subsequent time steps.