Fluid reaction surfaces (i.e. – impellers) – Method of operation
Reexamination Certificate
2006-12-12
2006-12-12
Nguyen, Ninh H. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Method of operation
C416S224000, C416S22900R, C416S230000, C416S23600R, C416S24100B, C416S500000
Reexamination Certificate
active
07147437
ABSTRACT:
A steam turbine blade includes a shank portion and an airfoil portion. The airfoil portion is formed with at least one pocket filled with a polymer filler material chosen as a function of natural frequency impact on the turbine blade or as a function of the damping characteristics of the filler materials. A steam turbine rotor wheel includes a plurality of blades secured about a circumferential periphery of the wheel, each blade having one or more pockets in the airfoil portion, the plurality of blades divided into two groups of blades. The pockets of one group of blades are filled with one or more polymer filler materials, and the pockets of the other group of blades filled with one or more polymer filler materials, wherein the polymer filler materials in the one group of blades creates different natural frequencies or damping characteristics in the blades of the one group than the polymer filler materials in the blades of the other group. The two groups of blades are assembled on the rotor wheel in accordance with a predetermined pattern.
REFERENCES:
patent: 4097192 (1978-06-01), Kulina
patent: 5286168 (1994-02-01), Smith
patent: 5295789 (1994-03-01), Daguet
patent: 5524341 (1996-06-01), Ferleger et al.
patent: 5720597 (1998-02-01), Wang et al.
patent: 5931641 (1999-08-01), Finn et al.
patent: 5947688 (1999-09-01), Schilling et al.
patent: 6033186 (2000-03-01), Schilling et al.
patent: 6039542 (2000-03-01), Schilling et al.
patent: 6042338 (2000-03-01), Brafford et al.
patent: 6139278 (2000-10-01), Mowbray et al.
patent: 6224341 (2001-05-01), Fricke
patent: 6287080 (2001-09-01), Evans et al.
patent: 6428278 (2002-08-01), Montgomery et al.
patent: 6471482 (2002-10-01), Montgomery et al.
patent: 6854959 (2005-02-01), Barb
patent: 1 152 123 (2001-11-01), None
European Search Report for Application No. 05254608, dated Sep. 30, 2005.
Barb Kevin Joseph
Burdgick Steven Sebastian
DeLeonardo Guy W.
Lin Wendy W.
General Electric Company
Nguyen Ninh H.
Nixon & Vanderhye P.C.
LandOfFree
Mixed tuned hybrid blade related method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixed tuned hybrid blade related method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixed tuned hybrid blade related method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3719639