NOZZLE FOR PRODUCING CUTTING JET OF LIQUID Russian patent published in 2002 - IPC

FIELD: units for producing cutting jets; cutting various sheet materials by supersonic jet of liquid. SUBSTANCE: proposed nozzle has pipe union with spherical butt and axial liquid supply passage, holder secured on pipe union, insert mounted flush in holder and embraced by bush made from soft material whose butt adjoins spherical butt of pipe union located at spaced relation to butt of insert directed towards it; inner profile of insert is made in form of body of revolution at varying radius of section. EFFECT: enhanced cutting properties of jet due to reduction of hydraulic resistance and turbulent disturbances near walls of inner profile made in insert taking into account change in characteristics of supersonic flow of liquid (kinematic viscosity), thickness of boundary layer, etc). 2 dwg