Decanter centrifuge

Details Decanter centrifuge Decanter centrifuge

1980-01-25

1981-11-03

Jenkins, Robert W.

Chemistry: physical processes

233 24, B04B 120

Patent

active

042981620

ABSTRACT:
A system for controlling the relative rpm. of the conveyor screw of a decanter centrifuge includes a gear interconnecting the screw and the centrifuge drum. The gear has an input shaft the rpm. of which determines the relative rpm. of the screw, and a housing rotating in synchronism with the drum. The input shaft and the housing are coupled to one each of two rotary, positive displacement machines one of which is a constant displacement machine while the other is a variable displacement machine. The machines are hydraulically connected in series in a closed circuit so that a change in the displacement volume of the variable machine, at constant rpm. of the gear housing, results in a change in the rpm. of the input shaft. The variable displacement machine may be mechanically coupled to a further constant displacement machine whereby the flow rate through the variable displacement machine is reduced to the difference between the flow rates through the other two machines.

REFERENCES:
patent: 2955753 (1960-10-01), O'Conor
patent: 3494542 (1970-02-01), Graig
patent: 3734399 (1973-05-01), Das
patent: 3923241 (1975-12-01), Cyphelly
patent: 4073431 (1978-02-01), Jager
patent: 4113171 (1978-09-01), Cyphelly
patent: 4228949 (1980-10-01), Jackson

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