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. 24, 2017
Filed:
Feb. 19, 2015
Applicant:
Rolls-royce Deutschland Ltd & CO KG, Blankenfelde-Mahlow, DE;
Inventor:
Volker Guemmer, Mahlow, DE;
Assignee:
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 5/02 (2006.01); F04D 29/54 (2006.01); F04D 29/32 (2006.01); F01D 5/14 (2006.01); F01D 1/06 (2006.01);
U.S. Cl.
CPC ...
F01D 5/022 (2013.01); F01D 1/06 (2013.01); F01D 5/142 (2013.01); F01D 5/146 (2013.01); F04D 29/324 (2013.01); F04D 29/544 (2013.01); Y02T 50/673 (2013.01);
Abstract
A blade row group arrangeable in a main flow path of a fluid-flow machine includes N adjacent member blade rows firmly arranged relative to each other in both a meridional direction (m) and a circumferential direction (u). A relative secondary passage length (v') and a relative secondary passage width (w′) each increase at least in one part of the area between the mean meridional flow line (SLM) and at least one of the main flow path boundaries (HB) towards the main flow path boundary (HB).