Automatic frequency controlled motor backdrive

Details Automatic frequency controlled motor backdrive Automatic frequency controlled motor backdrive

1993-06-04

1995-04-04

Scherbel, David A.

Imperforate bowl: centrifugal separators

Rotatable bowl

Including driven material-moving means therein

494 8, B04B 904

Patent

active

054032601

ABSTRACT:
In a horizontal centrifuge, a bowl rotates in the same direction as a screw internally of the bowl. The bowl and screw connect to a three input gear box which rotates the bowl and screw at a small differential, or the scrolling rate. A separate motor running at a variable rate connects to the third gear box input and thereby reduces the scrolling rate. A feedback loop connects to the motor to vary the motor speed so that the scrolling rate is varied. A maindrive motor rotates the bowl which then couples through the gear box to rotate the screw and thereby furnish the power to rotate the bowl and screw.

REFERENCES:
patent: 3734399 (1973-05-01), Oas
patent: 4141488 (1979-02-01), Gense
patent: 4240578 (1986-12-01), Jackson
patent: 4298162 (1981-11-01), Hohne
patent: 4299353 (1981-11-01), Bruning
patent: 4369915 (1983-01-01), Oberg
patent: 5203762 (1993-04-01), Cooperstein

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