DEVICE FOR GAS DYNAMIC DEPOSITION OF COATING ON PART INNER CYLINDRICAL SURFACE Russian patent published in 2014 - IPC C23C24/04 B05B7/14 

FIELD: metallurgy.

SUBSTANCE: proposed device comprises feeder-proportioner, system to feed working gas and powder particles into prechamber, replaceable radial supersonic nozzle, device drive and isolating chamber with suction system. Nozzle edge diameter is selected on the basis of the following relationship: d_ex=d_in-21_ns., where d_in is part hole diameter, l_ns is distance from nozzle edge to spayed surface making (1-10)δ_ex; δ_ex is transverse size of radial nozzle supersonic channel part at the edge. Nozzle ID is selected proceeding from: where δ_cr is transverse size of radial nozzle supersonic channel part at nozzle throat. Note here that note here that said device allows feeding the working gas into prechamber via tangential or radial channels and powder via radial channels.

EFFECT: higher quality of coating, simplified design, expanded applications.

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