JPS5791756A - Purification of oil - Google Patents

Abstract

PURPOSE: To remove fine impurities in an oil in good efficiency by passing D.C. electric current through electrode plates in a container containing the oil to which water or a water containing substance is added to generate attractive and repulsive electric force between positive and negative electrodes.

CONSTITUTION: An oil flowed into an electrostatic oil filter 11 from an inflow port 14 is flowed into an inner part of an inner side electrode 21 and, thereafter, passed through each small pores 22 to be flowed out into an oil purifying chamber A formed between the inner side electrode 21 and a container 12 and flowed upwardly in the oil purifying chamber A to be flowed out from each outflow ports 15. When electric current is flowed to the electrostatic oil filter 11 from a negative pole of a D.C. power source 10, the inner side electrode 21 functions as a cathode and the container 12 as an anode and, between both electrodes 21, 12, that is, in the oil purifying chamber 10, an electric field is formed to attract negatively charged fine particles in the oil to a direction of the container 12 to adhere the same to an inner surface of the container 12. The oil purified in the oil purifying chamber A is discharged to a discharge passage 8 from an oil outflow port 15.

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