INDUCTION HEATER OF BUSHING SURFACE Russian patent published in 2010 - IPC H05B6/00 

FIELD: machine building.

SUBSTANCE: induction heater of bushing surface consists of first inductor made in form of cylinder coil out of cooled current conducting tube connected to high frequency current source and inserted inside aperture of bushing with gap and of second inductor identical to first one. Also turns of coils of the first and the second inductors alternate forming periodic sequence. Ends of coils are joined with a jumper, while starts are connected to the source of high frequency current Distance between surfaces of neighbour turns of coils is not less, than one third of the gap between heated surface of the bushing and surface of a coil turn.

EFFECT: expanded efficiency of inductor for through heating for heating surface of small diametre apertures.

2 cl, 1 dwg.