57 results about "Electrohydrodynamics" patented technology

The invention belongs to the technical field of advanced manufacturing, and provides a laser auxiliary electric jetting in-situ printing manufacturing method. A functional material ink flows out froma spraying needle port under the action of pressure, and due to the action of the electrohydrodynamics effect, a stable Taylor cone is formed to jet out stable fine jet flow to a base body to form a printing layer. Meanwhile, a laser energy device is used for carrying out composite processing on the printing layer, emitting laser beams and irradiating the printing layer according to printing tracks, and high-temperature curing, crystallization and other functional processing on a printing structure can be synchronously realized in situ. According to the method, functional structures and devices are directly realized on the base body in situ, the problem of secondary positioning errors of transferring, gluing, splicing and the like in a traditional method is eliminated, the problems that binding force is weak, and sensitivity is low due to a gluing process are avoided, and the feature size of a functional unit can be reduced by means of the high-resolution printing advantage of electricjetting; and the size precision and the bonding strength of a printing unit structure are improved, so that the sensitivity and the stability of the devices are improved.

The invention discloses a novel coupling cooling device based on ionic wind, a cooling method and application thereof. The bottom of a shell is provided with a uniform temperature plate substrate in contact with a heat source, the uniform temperature plate substrate is vertically provided with a plurality of metal radiating fins at intervals, and a flow channel is formed between every two adjacent metal radiating fins; the bottom side of the interior of the shell is filled with cooling liquid, and the cooling liquid is evenly distributed in the flow channel; an ionic wind generator is arranged at the front part of the shell and comprises a high-voltage power supply, a plurality of electrodes and an electrode support; the plurality of electrodes are fixed on the electrode support at equal intervals, and the plurality of electrodes are electrically connected to the high-voltage power supply; and a receiving electrode made of a stainless steel wire mesh material is arranged at the rear part of the shell and is attached to the side wall of the rear part of the shell. The invention creatively provides a novel heat exchanger combining electrohydrodynamics and phase-change heat exchange, and organic coupling of two heat exchange modes of increasing convective heat exchange in the metal radiating fins and phase-change heat exchange at the roots of the metal radiating fins 3 is realized.

The invention discloses a nozzle of an electrohydrodynamics coaxial-printed polymer metal composite metamaterial. The nozzle is characterized in that an inner core is arranged in an outer shell; an insulation cavity is formed between the inner core and the outer shell; the outer shell is provided with an insulation liquid inlet and an insulation liquid outlet communicating with the insulation cavity; a spraying mouth is arranged in the bottom center of the outer shell, and is connected with a high-voltage electrode; a metal melt inlet channel, a polymer inlet channel and a metal melt outlet runner and a polymer outlet channel respectively pointed to the spraying mouth are formed on the inner core; the metal melt inlet channel communicates with the metal melt outlet runner; and the polymer inlet channel communicates with the polymer outlet channel. The nozzle has the following advantages: insulation liquid is filled in the insulation cavity to satisfy high-temperature condition in the printing process to prevent curing of molten-state material; and meanwhile, a metal melt and a polymer melt are directly filled in the spraying mouth for spraying under the effect of a high-voltage electric field of the high-voltage electrode without needing solvent auxiliary, so that the jet process is controlled more easily.

Magnetoelectrolysis cells known to operate successfully without utilizing a non-electrogenerated paramagnetic additive added to an aqueous electrolyte solution of such a cell may in some instances be further enhanced by utilizing such an additive. However, excessive amounts of additive are impracticable and formerly proposed transition metal salts used as paramagnetic additives were never demonstrated as effective except when used in large amounts. Now it is disclosed that small amounts of a salt of a paramagnetic lanthanide solve the problem, if methodically applied to enhancing the magnetoelectrolysis cell in accordance with the specified steps of the invention.