Abstract:
Various components of a spraying system are provided. The spraying system may have a spraying module to accelerate a spray media toward a target and a controllable charging module to impart an electrostatic charge to the spray media. The electrostatic charge imparted to spray media may be changed over time by the controllable charging module. In this manner, characteristics of spray media in flight and arriving at a target may be controlled.
Abstract:
La présente invention concerne un dispositif et un procédé de projection en particulier sous forme de nappe d'un liquide pouvant être électriquement isolant au moins par des forces électrostatiques, le dispositif étant conçu pour pulvériser ce liquide ou pour en contrôler des oscillations en y générant des battements. L'invention concerne notamment un injecteur de carburant pour chambre de combustion d'un moteur thermique incorporant ce dispositif. Ce dispositif de projection (1 ) comprend une buse qui forme un canal d'amenée (14) du liquide vers au moins un orifice de projection (15) de ce dernier hors du dispositif et qui incorpore à proximité de cet orifice une première et une seconde électrodes (7 et 12) agencées pour injecter des charges électriques dans le liquide. Selon l'invention, le bord (15) de cet orifice comprend, d'un côté du canal, au moins une extrémité saillante (7a) de la première électrode (7) qui fait saillie dans ce canal et qui est destinée à être en contact avec le liquide et, d'un autre côté du canal, un corps de buse (8) électriquement isolant dans lequel est noyée la seconde électrode (12) de manière adjacente à la première électrode, de sorte que l'intensité du champ électrostatique en la ou chaque extrémité saillante soit maximisée.
Abstract:
A nozzle device (1) for a spray applicator (10) for applying electrically conducting fluid materials (3) with a high voltage application apparatus or system based on atomization technique, said nozzle device (1) having a tubular inner shape and being arranged to conduct a non-electrically-conducting gas flow (7) in the center of the nozzle and conduct the fluid materials (3) in a fluid cylinder surrounding the gas flow (7) towards a discharge orifice (5), such that a flowing annular fluid sheet (3b) is provided, wherein said nozzle device (1) comprises a plurality of groves (11) extending in a longitudinal direction (L) of the nozzle device (1), said grooves (11) being arranged to divide the annular fluid sheet (3b) into fluid ligaments (13) such that fluid droplets (15) are produced at the exit of the discharge orifice (5)..
Abstract:
The invention relates to apparatus (2) and a method for the dispensing of fluid material particles under pressure and with an electrostatic charge. The apparatus (2) and method allow, when the apparatus has been moved from a dispensing mode, a purge of said fluid material to be performed so as to at least reduce the quantity of electrostatically charged fluid material retained within the apparatus. A dispensing assembly (22) can also be provided including a nozzle (26) which can be selectively attached thereto. The nozzle (26) and purging of the apparatus allow the risk of electric shock discharge to operators of this type of apparatus to be reduced.
Abstract:
Verfahren zur Funktionskontrolle eines elektrohydrodynamischen Zerstäubers (20), wobei von dem Zerstäuber (20) ausgehend ein elektrohydrodynamisch zerstäubtes Fluid (23) auf einen Körper, z.B. eine Person, aufgetragen wird, um diesen Körper zumindest abschnittsweise zu beschichten, wobei der Zerstäuber (20) einen Fluidtank zur Bevorratung des Fluids (23) und mindestens eine Hochspannungsquelle zur Bereitstellung einer Hochspannung sowie mindestens eine Pumpeinheit zum Transport des Fluids umfasst, wobei das Fluid (23) mittels der Pumpeinheit zu einer Düsenanordnung des Zerstäubers (20) gefördert wird, und wobei das Fluid (23) an der Düsenanordnung mittels Einwirkung der Hochspannung aus der Hochspannungsquelle elektrohydrodynamisch zerstäubt wird, wobei eine Spannung und/oder ein Strom an der Hochspannungsquelle ausgewertet wird, um über eine Strom-Spannungs-Kennlinie einen Arbeitspunkt der Hochspannungsquelle zu erfassen.
Abstract:
A spray nozzle assembly and a method for shaping a spray stream provided through a spray assembly includes electrostatically charging spray nozzle assembly and a method for shaping a spray stream provided through a spray assembly includes electrostatically charging a spray stream by exposing fluid to be sprayed to an electrical field within a fluid sprayer(lOO) to create an electrostatically charged spray stream, and then creating an electrical field between secondary electrodes (206) externally to the fluid sprayer (100) such that the electrostatically spray stream is shaped and/or redirected as it passes through the electrical field.
Abstract:
An air assisted electrostatic liquid spray nozzle assembly having a relatively long elongated nozzle body with a spray tip and surrounding air cap disposed at a downstream end of the nozzle body. The spray nozzle assembly includes an upstream electrode for connection to a high voltage electric source, an elongated feed tube, an electrically enhancing stinger, and the spray tip which are secured and retained by the air cap in electrically conductive relation to each other such that liquid passing through liquid passages of the electrode, feed tube, stinger, and spray tip is discharged in an electrostatically charged pattern of liquid particles. The air cap is removable to permit easy removal and replacement of the spray tip, stinger, and liquid feed tube.
Abstract:
A system (10) including an electrostatic spray system, including a handheld spray coating device (12), a rotary atomizer (14) coupled to the handheld spray coating device (12), wherein the rotary atomizer (14) atomizes a liquid flowing through the handheld spray coating device (12), and an indirect charging device (16) coupled to the handheld spray coating device (12), wherein the indirect charging device (16) is configured to electrostatically charge the liquid exiting the rotary atomizer (14).