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:
Oct. 22, 2019
Filed:
May. 27, 2016
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventor:
Maksim Pankratov, Mississauga, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, QC, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 5/10 (2006.01); F16F 15/129 (2006.01); F16F 7/06 (2006.01);
U.S. Cl.
CPC ...
F01D 5/10 (2013.01); F16F 7/06 (2013.01); F16F 15/129 (2013.01); F05D 2220/323 (2013.01); F05D 2240/20 (2013.01); F05D 2250/184 (2013.01); F05D 2260/96 (2013.01);
Abstract
A damper ring is mounted in frictional engagement with a radially inwardly facing surface of a circumferential groove defined in a rotary part of a gas turbine engine. Energy dissipation is provided via sliding friction of the ring in the groove. Pressure relief dimples are provided around the outer diameter of the ring for locally reducing contact pressure at the outer diameter below a value at which the damper ring locks in the groove by friction forces when subject to centrifugal loads.