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US 4,546,923 AGranted
Nozzle for atomizing fluids
OwnerTadashi Iiinventor
Life of this patent
Estimating the term…
Abstract
A nozzle for atomizing or discharging a liquid, particles, powder or the like in a uniform and stable state without disturbance, utilizing a rotating air current of low wind pressure, low velocity and low flow rate. A working fluid, for example air, is fed through a passage of a nozzle body, flows in a laminar state around a working fluid straightening member, and then passes through tornado-stage fluid slots and is discharged in a tornado shape vortex at the nozzle outlet. A vacuum is produced when the working fluid is discharged from the nozzle outlet, and a fluid to be atomized is drawn through a passage in the straightening member by this vacuum and is atomized together with the working fluid in a tornado shape at the nozzle outlet. The nozzle bore can be larger than in conventional nozzles.
Claims7
A nozzle, comprising:
- a nozzle body having a generally planar end surface thereon and having means defining a passageway therein which communicates with a generally circular opening provided in said end surface, a portion of said passageway adjacent said opening being a frustoconical surface which tapers toward said end surface;
- a member disposed in said passageway, having a generally planar end surface which is approximately flush with said end surface on said nozzle body, having a frustoconical surface thereon which converges toward said end surface thereof and is disposed against said frustoconical surface on said nozzle body, and having means defining a cylindrical passageway which extends into said member from and perpendicular to said end surface thereof coaxial with said frustoconical surface thereon, wherein an apex of an extension of said frustoconical surface on said member lies on an axis of said cylindrical passageway, the intersection of said extension of said frustoconical surface on said member and an extension of the surface of said cylindrical passageway therein being a circle lying in a plane parallel to and spaced outwardly from said end surface on said member;
- means defining a plurality of angularly spaced grooves in one of said frustoconical surfaces, each said groove having two spaced side walls and a bottom wall which all converge to a point located on said circle, said side walls each following a logarithmic spiral, wherein a center line of each said groove provided intermediate said side walls thereof is substantially an arc having a center point which is spaced farther from said apex of said frustoconical surface than from said circle;
- and
- supply means for supplying a pressurized first fluid to said passageway in said nozzle body and for supplying a second fluid to said passageway in said member, said pressurized first fluid flowing through said grooves in said frustoconical surface and being emitted from said nozzle as a spiral flow which produces a vacuum which causes said second fluid to be drawn out of said passageway in said member and to be atomized.
2 more elements
A nozzle, comprising:
- an elongate inner member of generally circular cross-section having a cylindrical central passageway extending concentrically thereinto from a first end thereof, said passageway having a substantially uniform diameter over a substantially axial extent thereof, said inner member further having a rounded surface portion on a second end thereof remote from said first end and having a frustoconical surface portion thereon at said first end thereof which converges toward said first end and is concentric to said central passageway, said frustoconical surface portion of said inner member having plural angularly spaced grooves therein which each converge in cross-section in a direction away from said second end of said inner member and which each have a centerline which follows a spiral and contacts a circle defined by an intersection of extensions of said frustoconical surface portion and said passageway of said inner member, each said centerline being approximately an arc and having a centerpoint which is closer to said circle than to an apex of said frustoconical surface of said inner member;
- a tubular outer member having therethrough a passageway which includes a cylindrical portion of substantial axial extent and a frustoconical portion which is adjacent and converges away from said cylindrical portion, said inner member being supported within said cylindrical portion of said passageway through said outer member so that said frustoconical surface portion thereon engages and said rounded surface portion is spaced from said frustoconical portion of said passageway in said outer member;
- means for introducing a liquid to said cylindrical central passageway in said inner member at a location spaced a substantial axial distance from said first end of said inner member;
- and
- means for introducing a pressurized gas to said cylindrical portion of said passageway in said outer member at a location spaced upstream of said inner member and for causing said gas to flow through said cylindrical portion of said passageway in said outer member in a direction toward said frustoconical surface portion thereof, to be guided around said inner member by said rounded surface portion thereon, and to then flow through and be discharged from said grooves.
2 more elements
Dependencies are inferred from the claim text.