Centrifugal pendulum absorber for engine blades

Fluid reaction surfaces (i.e. – impellers) – With weight-balancing means – Self-shifting or selectively adjustable mass

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

416500, 188378, F01D 516, F01D 526

Patent

active

059248459

ABSTRACT:
A new apparatus and method for dynamically absorbing resonant vibration in jet engine blades and other rotating turbomachine components over all engine speeds is disclosed. A distributed pendulum (a pendulum having its axis of motion inside its body instead of at an end) is mounted inside a jet engine blade to function as a centrifugal pendulum. A centrifugal pendulum can be tuned so that its natural frequency linearly tracks the rotational speed of the engine or other turbomachine in which it is mounted and can absorb resonant vibrations from turbomachine components whenever the frequency of a source of vibratory excitation from a so-called speed line of the turbomachine coincides with a resonant frequency of the component. The equations of motion of a distributed pendulum are derived to show that a distributed pendulum small enough to fit inside a turbomachine component can be tuned to track a turbomachine speed line by adjusting its mass distribution about its axis of motion.

REFERENCES:
patent: 4057363 (1977-11-01), Benigsberg et al.
patent: 4239455 (1980-12-01), Broekhuizen et al.
patent: 4239456 (1980-12-01), Joglekar et al.
patent: 4460314 (1984-07-01), Fuller
patent: 4527951 (1985-07-01), Trier
patent: 4766984 (1988-08-01), Gaffey et al.
patent: 5495924 (1996-03-01), Shaw et al.
K. P. Byme "Pendulum Dynamic Biration (SIC) Absorbers for Reducing Blade Vibration in Idustrial Fans," Vibration of Blades and Bladed Disk Assemblies: Procedings of the ASME Tenth Biennial Conference on Mechanical Vibration and Noise, pp. 89-96, 1985.
Es Tse at al., Mechanical Vibration, pp. 167-197, 1971.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Centrifugal pendulum absorber for engine blades does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Centrifugal pendulum absorber for engine blades, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Centrifugal pendulum absorber for engine blades will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1316324

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.