Lechler Gmbh & Co. Kg

Wolfgang Nieuwkamp

Martin Junger

Helmut Wenzel

Werner Raissle

Dieter Kroger

A cylindrical inset forming a mixing chamber in a binary atomizing nozzle is mounted in a housing ahead of the nozzle discharge and is provided with radial boreholes. The liquid to be atomized, for instance water, and the atomizing gas, for instance air, are fed to the cylindrical inset, with the liquid arriving axially and the gas passing radially from an annular spacing surrounding the inset within the nozzle housing through the radial boreholes into the inset. The radial boreholes are located in several consecutive transverse plans when viewed in the direction of flow and are arrayed in mutually offset manner in the circumferential direction of the cylindrical inset.

Cylindrical inset for a binary atomizing nozzle

A dual-material atomizing nozzle comprises a housing (10) with a gas intake (13), a liquid intake (14) and with a mixing chamber (11) for the gaseous and liquid components; a rod-like insert (16) flaring into a saucer-shape opposite the nozzle exit extends through the mixing chamber (11) along its longitudinal axis (15); the end of the housing (10) which is at the nozzle exit side is thus covered while forming an approximately radial, annular-gap shaped nozzle exit slot (23). At least one convergent/divergent tube-path (28, 29; 25, 24) based on the Laval principle is provided within the mixing chamber (11) no farther than the nozzle exit (12). Thereby, and especially when a second convergent/divergent tube path (25, 24) is present behind the liquid intake (14), first the gas and also the mixture of gas and liquid will be accelerated within the nozzle housing (10) to supersonic speed. In this manner a dual-material atomizing nozzle is created with an adequately large angle of jet and providing fine droplets, being insensitive to soiling and requiring only a slight ratio of gas to liquid, being resistant to wear and clogging.

Dual-material atomizing nozzle

A solid-cone jet nozzle for spraying liquids has a cylindrical turbulence chamber, a liquid feed bore that tangentially enters the chamber, a flaring discharge opening that forms an axial extension of the chamber, and recesses and elevations made in the bottom of the chamber. The liquid exits the discharge opening in a direction which is perpendicular to the liquid feed bore. The recesses and elevations control the liquid flow.

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Kappishausern, Germany

Wolfgang Nieuwkamp