ELECTROCHEMICAL TREATMENT METHOD FOR NOZZLE OPENINGS MADE OF CONDUCTIVE MATERIAL Russian patent published in 2015 - IPC B23H3/10 B23H9/00 

FIELD: electricity.

SUBSTANCE: invention is related to electrochemical treatment and may be used for electrochemical tuning of nozzles made of current-conducting materials, mainly for nozzles of liquid-propellant rockets. The method includes geometric dimensions tuning for openings by electrochemical treatment using a hollow cathode tool. Initially without current supply conductive fluid is fed through the cathode tool and openings, feed rate of this fluid is registered for each treated opening, then openings with minimum rate are defined and all openings are plugged except for the above one; thereupon current is supplied and injection of conductive fluid is made through the above opening until the feed rate reaches the adjacent and/or the next value to the minimum one equal to the feed rate through an identical opening; thereupon current is switched off. Then plugs are removed, feed rate of conductive fluid is registered through each treated opening and fluid distribution is defined for nozzle openings.

EFFECT: method allows manufacturing of nozzles with the preset feed rate of component through their openings.

1 dwg