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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 10167874 B1

PDFFull Text
Date of Patent:
Jan. 01, 2019

Filed:

Jul. 11, 2014

Centrifugal pump, in particular for supplying power to rocket engines

Applicant:

Snecma, Paris, FR;

Inventors:

François Danguy, Tourny, FR;

Jean-Michel Nguyen Duc, Vezillon, FR;

Laurent Fabbri, Gasny, FR;

Cëdric Sene, Rouen, FR;

Assignee:

Arianegroup SAS, Paris, FR;

Attorney:

Bookoff McAndrews, PLLC

Primary Examiner:

Logan Kraft

Assistant Examiner:

Elton Wong

Int. Cl.
CPC ...
F04D 29/08 (2006.01); F02K 9/48 (2006.01); F01D 25/18 (2006.01); F01D 25/16 (2006.01); F01D 3/04 (2006.01); F04D 29/22 (2006.01); F04D 29/043 (2006.01); F04D 29/046 (2006.01); F04D 1/00 (2006.01); F04D 29/42 (2006.01); F01D 5/02 (2006.01); F02K 9/46 (2006.01); F04D 7/02 (2006.01); F04D 13/04 (2006.01); F04D 29/041 (2006.01); F04D 29/10 (2006.01);
U.S. Cl.
CPC ...
F04D 29/086 (2013.01); F01D 3/04 (2013.01); F01D 5/02 (2013.01); F01D 25/16 (2013.01); F01D 25/183 (2013.01); F02K 9/46 (2013.01); F02K 9/48 (2013.01); F04D 1/00 (2013.01); F04D 7/02 (2013.01); F04D 13/043 (2013.01); F04D 29/043 (2013.01); F04D 29/046 (2013.01); F04D 29/0413 (2013.01); F04D 29/108 (2013.01); F04D 29/22 (2013.01); F04D 29/426 (2013.01); F05D 2220/80 (2013.01); F05D 2240/53 (2013.01);
Abstract

The invention relates to the field of centrifugal pumps, and in particular it relates to a centrifugal pump () comprising at least: an impeller (); a rotary shaft () secured to said impeller (); a casing () having an axial admission passage (); at least one first bearing () supporting said rotary shaft () in said casing (); and at least one dynamic seal () around the rotary shaft (), the impeller () being situated between the at least one dynamic seal () and the axial admission passage () of the pump (). The centrifugal pump () also comprises, between the impeller () and at least one dynamic seal (), an axial force compensation disk () secured to the shaft () and presenting a diameter greater than 70% of a diameter of the impeller (). A front face () of the disk () faces towards the impeller () and is connected to a branch connection for fluid under pressure taken downstream from the pump (), and a rear face () faces towards the dynamic seals () and presents fins () that are oriented radially, at least in part.

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