Dalian University of Technology

Kai Li

Ming Chen

Yan Lin

Yanyun Yu

Yunlong Wang

Guan Guan

Chaoguang Jin

Junsheng Liang

Dazhi Wang

Tongqun Ren

The present invention belongs to the field of advanced manufacturing technology and relates to one set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field. This method is used to fabricate micro/nano 3D structure, under the resultant effects of electro hydrodynamic force and thermal field. First of all, the ink reaches needle orifice at a constant speed under the resultant effect of fluid field and gravity field. Then a high voltage electric field is applied between needle and substrate. And the ink is dragged to form stable micro/nano scale jet which is far smaller than the needle size using the electric field shear force generated at needle orifice. The solvent evaporation rate of ink increases combined with the radiation of thermal field at the same time. Finally, the micro/nano scale 3D structure is fabricated on substrate with the accumulation of jet layer by layer. Compared with liquid jet printing technology, this method describing in present invention owns many advantages, including wide adaptability of material and manufacturing complex micro/nano scale 3D structures.

Set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field

An unmanned semi-submarine, including a main hull; airfoil buoyancy chambers; an antenna; a radar; a propeller; a rudder; and compartments. The airfoil buoyancy chambers include a front buoyancy chamber and a rear buoyancy chamber. The front buoyancy chamber and the rear airfoil buoyancy chamber are longitudinally distributed on the main hull. The radar and the antenna are disposed on the top end of the front buoyancy chamber. The rudder is disposed on the rear buoyancy chamber. The propeller is disposed at the tail of the main hull to drive the unmanned semi-submarine. The horizontal sections of the front buoyancy chamber and the rear buoyancy chamber are symmetrical airfoil. The compartments include a front equipment compartment, a rear equipment compartment, a control equipment compartment, a battery compartment, and a propelling compartment. The compartments are separated from one another using watertight walls.

Unmanned semi-submarine

An unmanned surface vehicle (USV) including a main body; a slideway; and an automatic recovery unit. The slideway includes pulleys, slide rails, sleepers, end plates disposed at two sides of the sleepers, and baffle plates. The automatic recovery unit includes a buoy, a connection rod, a downhaul, an electromagnetic fixer, a winch, an upper cable, a storage box, and a recovery net. The slideway is fixed on the afterdeck of the main body and the tail end of the slideway sticks out the side boundary of the afterdeck. The baffle plates are disposed on the upper end of the end plates. The vertical height of the end plates is larger than the maximum vertical height of the pulleys and the slide rails. The baffle plates on the upper end of the end plates limit the displacement of the buoy in the vertical direction.

Unmanned surface vehicle and method of using the same

A carrying device for a side-scan sonar, including a suspension rod, a hanging rack, and a flange. The side-scan sonar is in fixed connection to the lower part of the hanging rack. The suspension rod includes a suspension unit, a universal joint, and a tension rod. The flange is disposed below the lower part of the tension rod. The hanging rack includes a Z-shaped main cross beam. Two U-shaped hooks are disposed at two ends of the Z-shaped main cross beam for supporting the side-scan sonar. A vertical drag hook is disposed in the inner side of each of the two U-shaped hooks for hanging the side-scan sonar. The flange is fixed in the center of the Z-shaped main cross beam.

Carrying device for side-scan sonar

An attitude-adaptive hydrofoil apparatus, including: strut-braced wing assemblies, a horizontal wing assembly, connection plates, and attack angle adjusting plates. The strut-braced wing assemblies each include a bearing, at least one inclined tube, at least one inclined flow-guiding wing, and at least one stop dog. The horizontal wing assembly includes a horizontal tube, at least one horizontal flow-guiding wing, and at least one depth-locating wing. The attack angle adjusting plates each include an angle adjusting end plate having a hole. The strut-braced wing assemblies are symmetrically disposed at two sides of the horizontal wing assembly. The bearing is fixed on a vessel body by welding. The at least one inclined flow-guiding wing is sleeved on the at least one inclined tube, and is limited by the at least one stop dog. The attack angle adjusting plates are disposed at two ends of the horizontal tube, respectively.

Attitude-adaptive hydrofoil apparatus for high-speed underwater towing operation

A marking machine for sections of vessels, including: a marking device and a gantry. The gantry includes rail wheels, horizontal beams, and upright columns. The horizontal beams include an upper beam, middle beams, and lower beams. The marking device is disposed on the upper beam of the gantry. The marking device includes a trolley and a marking arm. The trolley hangs on the upper beam. The marking arm includes a plumbing arm, a swing arm, a first universal joint, a second universal joint, a first Z-shaped steering knuckle, a second Z-shaped steering knuckle, a telescopic arm, and a penholder. The plumbing arm is fixedly connected to the lower part of the trolley. The first universal joint is disposed on the plumbing arm. The first Z-shaped steering knuckle is connected to the first universal joint.

Marking machine for hull block sections

An electromagnetic marine fender, including: a rubber fender, two electromagnet groups, tensile steel ropes, an electric cable, and a waterproof power socket. Each electromagnet group includes at least one electromagnet. The electromagnet coils of the electromagnets have the same winding direction. The two electromagnet groups are disposed on two sides of the rubber fender, and the two electromagnet groups and the rubber fender are connected and fixed as a whole by the tensile steel ropes. The electromagnet is a combination structure including an electromagnet core, an electromagnet coil, an electromagnet steel shell, and a rubber coating covering the electromagnet steel shell from the center outward. The electromagnet coils of the electromagnets of the two electromagnet groups are connected in parallel, and the two electromagnet groups are in electric connection to the waterproof power socket via the electric cable.

Growing community of inventors

Dalian, China

Kai Li