Pneumatic atomizing nozzle
AssigneeSpraying Systems Manufacturing Europe GmbH
InventorStefan Markus
Life of this patent
Estimating the term…
Abstract
A pneumatic atomizing nozzle (10) which in a preferred form can be supplied with gas by means of a fan (43). The pneumatic atomizing nozzle (10) has a nozzle body (11), which bounds a flow space (21). The pneumatic atomizing nozzle (10) also has a liquid channel (27) having an outlet opening (38). Within the flow space (21), a liquid film (41) is formed, which is transported within the flow space (21) to a nozzle outlet (17) by the gas flow. The outlet opening (38) of the liquid channel (27) defines an outlet direction (A) for the liquid into the flow space (21), which in the preferred embodiment is opposite the flow direction (S) of the liquid film (41). At least in some sections, the liquid channel (27) and the outlet opening (38) extend transversely through the nozzle body (11) in a curved, wound, or meandering manner.
Claims17
A pneumatic atomizing nozzle (10) comprising
- a nozzle body (11) that defines a flow space (21) which leads to a nozzle opening (17) which defines a nozzle outlet;
- a gas channel (14) for supplying a gas, said gas channel (14) terminating in the flow space (21);
- a liquid channel (27) for supplying a liquid, said liquid channel (27) having at least one outlet opening (38) through which the liquid is discharged into the flow space (21) in order to be charged with gas from the gas channel (14) and form a liquid film (41) in a flow direction (S) in the flow space (21);
- and
- said at least one outlet opening (38) defining an outlet direction (A) out of the liquid channel (27) for the liquid, said outlet direction (A) being opposite to the flow direction (S) of the liquid film (41) in the flow space (21);
- said liquid channel (27) being formed through a guide body (36) that is configured and arranged so as to divide a liquid flow in the flow space (21) and to guide liquid flowing to the nozzle opening (17), said guide body (36) having the form, at least in some section, of one of an airfoil shape or an elongated drop shape or symmetrical wedge shaping in cross-section, and
- a front side of the guide body (36) facing the nozzle opening (17) forming a tearing edge (40) for the liquid film (41) arranged near the nozzle opening (17).
A method (50) for operating a pneumatic atomizing nozzle comprising the steps:
- supplying (51) liquid to a liquid channel (27) that is formed through a guide body (36) which is configured and arranged so as to divide a liquid flow in a flow space (21) and to guide liquid flowing to a nozzle opening (17), wherein the guide body (36) has the form, at least in some section, of one of an airfoil shape or an elongated drop shape or symmetrical wedge shape in cross-section, wherein a front side of the guide body (36) facing the nozzle opening (17) forms a tearing edge (40) for a liquid film (41) near the nozzle opening (17);
- ejecting (52) the liquid from the liquid channel (27) into the flow space (21) in a liquid outlet direction (A);
- supplying (53) gas to the flow space (21) for which a gas flow direction (S) has been defined, said gas flow direction being different from the liquid outlet direction (A);
- charging (54) the liquid entering the flow space (21) with the gas in such a manner that the liquid is deflected around the guide body (36) and the liquid film (41) is formed, said liquid film flowing in a flow direction (S) opposite the liquid outlet direction (A) to the nozzle opening (17);
- and
- dispensing (55) the liquid through the nozzle opening (17).
A pneumatic atomizing nozzle (10) comprising
- a nozzle body (11) that defines a flow space (21);
- a gas channel (14) for supplying a gas, said gas channel (14) terminating in the flow space (21);
- a liquid channel (27) for supplying a liquid, said liquid channel (27) having a spiraliform around the flow direction of the liquid film, said liquid channel (27) having at least one outlet opening (38) through which the liquid is discharged into the flow space (21) in order to be charged with gas from the gas channel (14) and form a liquid film (41) in a flow direction (S) in the flow space (21);
- and
- said at least one outlet opening (38) defining an outlet direction (A) out of the liquid channel (27) for the liquid;
- said outlet direction (A) being opposite to the flow direction (S) of the liquid film (41) in the flow space (21).
A method (50) for operating a pneumatic atomizing nozzle comprising the steps:
- supplying (51) liquid to a liquid channel (27);
- ejecting (52) the liquid from the liquid channel (27) into a flow space (21) in a liquid outlet direction (A) linearly through an outlet gap (38) that is curved in a spiraliform manner;
- supplying (53) gas to a flow space (21) for which a gas flow direction (S) has been defined, said gas flow direction being different from the liquid outlet direction (A);
- charging (54) the liquid entering the flow space (21) with the gas in such a manner that the liquid deflected and a liquid film (41) is formed, said liquid film flowing in a flow direction (S) opposite the liquid outlet direction (A) to a nozzle outlet (17);
- and
- dispensing (55) the liquid through the nozzle outlet (17).
Dependencies are inferred from the claim text.