Power plants – Reaction motor – Interrelated reaction motors
Reexamination Certificate
2007-10-19
2010-02-23
Casaregola, Louis J (Department: 3741)
Power plants
Reaction motor
Interrelated reaction motors
C060S792000, C415S122100
Reexamination Certificate
active
07665293
ABSTRACT:
An inner rotor shaft for use in a small twin spool gas turbine engine, the inner rotor shaft having a hollow middle section formed of a smaller diameter hollow section on a compressor end and a larger diameter hollow section on the turbine end of the shaft. Solid shaft end extend from the hollow section to form a forward solid shaft end to secure the fan rotor disk and an aft solid shaft end to secure the turbine rotor disk. A parabolic shaped transition section joins the forward shaft end to the smaller diameter hollow section, and a conical shaped transition section joins the aft shaft end to the larger diameter hollow section. A conical shaped transition piece joins the two hollow sections together to form an inner rotor shaft that can fit within a minimal space between the compressor rotor disk and the annular combustor assembly of the engine. The conical shaped transition section on the turbine end is so shaped in order to fit within a space formed inside the high pressure turbine rotor disk of the engine in order to minimize the axial spacing between the bearings that support the inner rotor shaft and raise the critical speed of the shaft to a safe level above the operating speed of the engine in order to make such a small twin spool gas turbine engine possible.
REFERENCES:
patent: 3814549 (1974-06-01), Cronstedt
patent: 3886737 (1975-06-01), Grieb
patent: 4392839 (1983-07-01), Aucktor
patent: 4557704 (1985-12-01), Ito et al.
patent: 4711008 (1987-12-01), Nakamura
patent: 5277661 (1994-01-01), Mak et al.
patent: 5454222 (1995-10-01), Dev
patent: 5526640 (1996-06-01), Brooks et al.
patent: 5951794 (1999-09-01), Dickson, Jr.
patent: 6062116 (2000-05-01), Morioka et al.
patent: 6117018 (2000-09-01), Tanada
patent: 6234912 (2001-05-01), Koschier et al.
patent: 6247346 (2001-06-01), Dickson, Jr.
patent: 6287209 (2001-09-01), Nakajima et al.
patent: 6328656 (2001-12-01), Uchikawa et al.
patent: 6364779 (2002-04-01), Duddy
patent: 6409606 (2002-06-01), Nakajima et al.
patent: 6422948 (2002-07-01), Murakami
patent: 6554714 (2003-04-01), Kurecka et al.
patent: 6726571 (2004-04-01), Ferriman et al.
patent: 6749518 (2004-06-01), Carrier et al.
patent: 7112141 (2006-09-01), Sakurai et al.
deLaneuville Robert E.
McMahon Ryan C.
Orndoff Paul E.
Wilson, Jr. Jack W.
Casaregola Louis J
Florida Turbine Technologies, Inc.
Ryznic John
LandOfFree
Low speed rotor shaft for a small twin spool gas turbine engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low speed rotor shaft for a small twin spool gas turbine engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low speed rotor shaft for a small twin spool gas turbine engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4164588