PLASMA BURNER, METHOD FOR INCREASING OPERATIONAL PERIOD OF BURNER CONSUMABLE PARTS Russian patent published in 2006 - IPC H05H1/34 

FIELD: plasma burners, method for increasing operational period of consumable parts of such burners, namely electrodes, tip and shielding cap.

SUBSTANCE: method comprises steps of providing gas turbulence at gas flowing over open surfaces of electrode, tip and shielding cap in order to increase turbulence degree in hydrodynamic boundary layer of gas flow for improving convection heat transfer. In order to increase turbulence degree of gas flow, for example over outer open surface of electrode, plasma burner electrode has rough or textured outer surface with recesses, grooves passing along axis or helical grooves formed in outer surface of electrode. Inner and outer surfaces of tip and inner surface of shielding cap also may be textured.

EFFECT: increased operation period of consumable parts.

74 cl, 14 dwg, 1 tbl