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:
Apr. 03, 2012
Filed:
Dec. 23, 2008
Marcus Joseph Ottaviano, North Reading, MA (US);
Robert John Parks, Ipswich, MA (US);
John Lawrence Noon, Swampscott, MA (US);
Mark Michael D'andrea, Belmont, MA (US);
Thomas Michael Regan, Marblehead, MA (US);
Aaron Todd Williams, West Chester, OH (US);
Marcus Joseph Ottaviano, North Reading, MA (US);
Robert John Parks, Ipswich, MA (US);
John Lawrence Noon, Swampscott, MA (US);
Mark Michael D'Andrea, Belmont, MA (US);
Thomas Michael Regan, Marblehead, MA (US);
Aaron Todd Williams, West Chester, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A gas turbine engine centrifugal compressor axial forward thrust apparatus bleeds impeller tip aft bleed flow from between an annular centrifugal compressor impeller of a high pressure rotor and a diffuser directly downstream of the impeller. The apparatus then uses the aft bleed flow to pressurize an annular cavity extending radially between an inner combustor casing and the rotor and extending axially between forward and aft thrust balance seals. Forward and aft thrust balance lands are in sealing engagement with the forward and aft thrust balance seals on the high pressure rotor respectively. An annular stator plenum in fluid communication with the annular cavity is bounded in part by a forward end wall having conical diffusion holes therethrough which may be axially or circumferentially or axially and circumferentially angled. The forward thrust balance seal may be on an aft conical arm of the impeller.