Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Blade received in well or slot
Reexamination Certificate
2006-02-17
2010-10-26
Look, Edward (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Blade received in well or slot
Reexamination Certificate
active
07819630
ABSTRACT:
A steam turbine blade in which the turbine blade has a blade root of the axially-inserted fir tree type and a larger number of turbine blades can be attached in a restricted outer peripheral region of a turbine rotor by arranging the blade root to be oriented in a direction forming a predetermined angle α larger than 0° relative to the axial direction of the turbine rotor. The steam turbine blade can suppress peak stresses generated at the bottoms of notches formed in the blade root and a blade groove and also suppress fretting fatigue from being induced by contact between peak stress generating areas and areas opposed to the peak stress generating areas at the notch bottoms. The steam turbine blade includes an airfoil, and a blade root attached to a turbine rotor and having plural stages of hooks in the radial direction of the turbine rotor.
REFERENCES:
patent: 2415847 (1947-02-01), Redding
patent: 2683583 (1954-07-01), Huebner, Jr. et al.
patent: 2862686 (1958-12-01), Bartlett
patent: 3112914 (1963-12-01), Wellman
patent: 4191509 (1980-03-01), Leonardi
patent: 6106233 (2000-08-01), Walker et al.
patent: 6582195 (2003-06-01), Davidson
patent: 6739836 (2004-05-01), Pinzauti et al.
patent: 7090464 (2006-08-01), Henning et al.
patent: 7182577 (2007-02-01), Yamashita et al.
patent: 7416389 (2008-08-01), Henning et al.
patent: 2003/0012655 (2003-01-01), Sasaki et al.
patent: 2004/0258529 (2004-12-01), Crain et al.
patent: 2005/0249599 (2005-11-01), Hemsley et al.
patent: 2006/0177314 (2006-08-01), Yamashita et al.
patent: 54-96618 (1979-07-01), None
patent: 5-086805 (1993-04-01), None
patent: 08-260902 (1996-10-01), None
patent: 8-260902 (1996-10-01), None
patent: 2003/014529 (2003-02-01), None
patent: 2004/022923 (2004-03-01), None
patent: 2004-116364 (2004-04-01), None
patent: 2004-257385 (2004-09-01), None
Chinese Office Action, Application No. 2006100082172, Jul. 27, 2007, 4 pages.
Nogami Shuhei
Yoda Hideo
Eastman Aaron R
Hitachi , Ltd.
Look Edward
Mattingly & Malur, P.C.
LandOfFree
Steam turbine blade, steam turbine rotor, steam turbine with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steam turbine blade, steam turbine rotor, steam turbine with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steam turbine blade, steam turbine rotor, steam turbine with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4171420