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:
Feb. 07, 2023
Filed:
Jul. 13, 2021
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Hien Duong, Mississauga, CA;
Vijay Kandasamy, T. Palur, IN;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 27/02 (2006.01); F04D 29/68 (2006.01); F04D 29/52 (2006.01);
U.S. Cl.
CPC ...
F04D 29/685 (2013.01); F04D 27/0215 (2013.01); F04D 29/522 (2013.01); F05D 2220/323 (2013.01);
Abstract
A casing treatment for a compressor includes one or more cavities in a casing disposed radially outwardly of tips of the compressor rotor blades. A liner is moveable relative to the casing between a first position and a second position. The liner is shaped to add a volume to the tip clearance gap when moving from the second position toward the first position. The liner is displaceable between the first and second positions in coordination with at least the rotation of inlet guide vanes (IGVs) between IGV positions.