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, and which has a spring rate within +40% to -25% of the spring rate at which the spring and mass means will vibrate in resonance with the vibration during chatter of the bowl-gearing-conveyor assembly.
Claims11
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 torquetransmitting 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
- the spring of said spring and mass means has a spring rate within the range of +40% to -25% of the spring rate at which said spring and mass means will vibrate in resonance with the vibration of said assembly during chatter.
Dependencies are inferred from the claim text.