Retrofitted rotor blades for steam turbines and method of making

Details Retrofitted rotor blades for steam turbines and method of making Retrofitted rotor blades for steam turbines and method of making

1988-08-30

1990-04-24

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416196R, 416500, 416DIG2, 416181, 298897, F04D 2938

Patent

active

049195930

ABSTRACT:
A retrofitted rotor blade having a longer length than an original rotor blade provided for a steam turbine rotor assembly has a tuned airfoil portion with natural resonant frequencies in a plurality of vibrational directions similar to the original rotor blade. Since lengthening the blade causes a decreased and resonant frequency, a unique combination of tuning techniques raises the resonant frequencies to the required levels. The tip of the retrofitted rotor blade is profiled to increase the natural resonant frequency in the second mode of vibration, which is in the axial direction of the rotor.

REFERENCES:
patent: 1544318 (1925-06-01), Hodgkinson
patent: 3412611 (1968-11-01), Eccles et al.
patent: 3653110 (1972-04-01), King, Jr. et al.

Affiliated with

Also associated with

Rating

Retrofitted rotor blades for steam turbines and method of making does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Retrofitted rotor blades for steam turbines and method of making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retrofitted rotor blades for steam turbines and method of making will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-31487