ELECTROCHEMICAL TREATMENT METHOD FOR NOZZLE HOLES 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 feed of current-conducting liquid through a hollow cathode and treated holes, at that current-conducting liquid is fed at first without current connection to the cathode and its consumption is recorded for each treated hole, thereafter the hole with minimum consumption is determined and all remaining holes are plugged. Then current is switched on and current-conducting liquid is injected through the above hole until consumption rate closest or next to minimum consumption rate is reached; then current supply is switched off and plugs are removed. Then consumption of current-conducting liquid is recorded again for each treated hole and unequal distribution of liquid is defined for holes, when required the treatment is repeated till the required distribution of liquid through holes is reached.

EFFECT: invention ensures receipt of the required even distribution of liquid in nozzle holes without pressure reduction in it.

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