Centrifuge with chatter suppression
AssigneeBird Machine Company, Inc.
InventorsHerbert L. Crosby, Jacob P. Den Hartog
Life of this patent
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Abstract
Chatter is suppressed in a solids-liquid separating centrifuge by including, in an external connection to a holder of the speed change gearing between the centrifuge bowl and conveyor, a spring and mass means which is torsionally resilient about the axis of the connection such that it will vibrate about that axis under chatter conditions at the chatter frequency, together with damping means acting in parallel with the spring and mass means to apply resistance to the torsional vibration thereof and thereby irreversibly extract energy therefrom.
Claims16
In a solids-liquid separating centrifuge of the type which includes an assembly of a rotary bowl member, a rotary conveyor member mounted coaxially therein, and speed change gearing connected between said members so that rotationally driving one of them rotationally drives the other in the same direction at a differential speed, and a torque-transmitting external connection between said gearing and a holder means, the torque on said external connection being relatively low compared to the torque on the connections between said gearing and said bowl and conveyor;
- the improvement for suppressing chatter of said assembly wherein:
- said external connection comprises spring and mass means which is torsionally resilient about the axis of said external connection such that it will vibrate about said axis during chatter of said assembly at the same frequency and has a spring rate lower than that of any torque transmitting component of said assembly;
- and
- separate damping means acting in parallel with said spring and mass means to apply resistance to the torsional vibration motion thereof and thereby irreversably extract energy therefrom.
Dependencies are inferred from the claim text.