10results about How to "Suppress eddy current" patented technology

The invention discloses a device and a method for laser crystal growth based on a seed crystal reentry method. The device comprises a furnace body and a control system, the lifting mechanism is arranged in the furnace body and is fixedly connected with the top of the furnace body; the lifting mechanism is connected with a seed crystal support, a rotating mechanism is arranged on the seed crystal support, and a torque detection device is arranged on the rotating mechanism; the seed crystal support is used for loading seed crystals; a crucible is arranged under the seed crystal, a plurality of heating units are arranged around the crucible, a rotating magnetic field generator is also arranged around the crucible, and a cooling system is arranged around the rotating magnetic field generator. According to the device and method for laser crystal growth based on the seed crystal reentry method, the eddy current phenomenon in the laser crystal growth process is effectively restrained by accurately controlling the intensity and frequency of the rotating magnetic field and optimizing magnetic field distribution.

The utility model discloses a rotor bow based on NURBS type double curvature variable cross section type line belongs to steel wire rope manufacturing equipment rotor part technical field, and this rotor bow main part is NURBS type double curvature bending section, and the cross section width is gradually increased from the center to both ends along the length direction, each section is composed of elliptical streamline, intermediate horizontal line section and upper three point arc line compound, and the smooth continuous axial symmetry profile is formed. The main body both ends pass through lofting stretching transition section and equal cross section end portion fairing link. Through the coupling design of variable cross section geometry and double curvature bending structure, improve high -speed rotation dynamic balance, restrain eddy current and flutter, reduce vibration noise and optimize stress distribution, thereby promote the working stability of stranding machine and steel wire rope stranding quality.

The utility model discloses a high stability proportional solenoid valve belongs to solenoid valve technical field, including valve body module, electromagnetic drive module, heat compensation module and dynamic voltage stabilizing module, the valve body module includes valve body, the valve sleeve valve core of pressure equipment in valve body front end hole to and is connected in valve body rear end face rear end cover, the electromagnetic drive module includes the magnetic conducting sleeve, the coil assembly of installation in the magnetic conducting sleeve to and drive valve core's push rod, the magnetic conducting sleeve front end is pressed into valve body middle hole, and the rear end is fixed through the flange bolt, the compensation ring of heat compensation module is in the excess of the magnetic conducting sleeve outer wall, the dynamic voltage stabilizing module includes the voltage stabilizing piston of being located in the blind hole of valve core tail part, the voltage stabilizing spring of top pressure piston to and the adjusting screw of adjusting spring pre -tightness. The present application offsets the thermal deformation of the magnetic conducting sleeve through the heat compensation module, and the dynamic voltage stabilizing module continuously absorbs the fluctuation of oil back pressure to make the output flow smooth and non-pulsating, and keeps the high stability of proportional control.

The application discloses a uniform degradation blood vessel stent based on a bionic function curve and a preparation method thereof, relates to the technical field of medical devices, and comprises the construction of a blood vessel stent model based on a bionic function curve, selective laser melting additive manufacturing of the blood vessel stent model and surface treatment on a zinc blood vessel stent structure. The zinc blood vessel stent structure can not only realize good mechanical support function, but also still provide strong stability in the material degradation process. The bionic configuration naturally avoids sharp corners of a traditional structure, can guide blood flow to smoothly pass, effectively inhibits the generation of turbulence and vortexes, and in addition, the subsequent degradation behavior of the metal zinc blood vessel stent structure is made more uniform through surface treatment, and local failure does not occur in the degradation process.

The invention discloses a ducted hovercar and a working method thereof, and belongs to the technical field of hovercars. Four wheels of a hovercar body in the ducted hovercar are ducted wheels, and a ducted fan electric propulsion system is mounted in the ducted hovercar; a cockpit is arranged in the middle of the hovercar body, ducted fan electric propulsion systems are installed on the front portion and the rear portion of the cockpit respectively, and an openable and closable drag reduction protection mechanism is installed above the ducted fan electric propulsion systems. The ducted wheels are driven by a tilting control mechanism to move forwards and rotate outwards; the ducted fan electric propulsion system in the middle provides main power in the take-off preparation stage and the descending hovering stage, and the ducted fan electric propulsion systems in the four ducted wheels provide main power in the stable flight stage. The power of the aircraft and automobile wheels are effectively combined, stable conversion between a flying mode and a land mode can be achieved, and the aircraft is more like a flying automobile instead of a vertical take-off and landing aircraft.

The invention relates to a rotor (10) for an electric motor (12) and an electric motor (12), the rotor having a base body (20) which extends concentrically around an axial rotor shaft (14), wherein the base body (20) consists of individual axially stacked plate stacks (32), wherein a magnet recess (18) is formed in a radially outer region (23) of the plate stack, into which a permanent magnet (16) engages, and a pole cap (40) having an outer contour (11) is formed radially outside the magnet recess (16), wherein an axial weld (55) is formed in the pole cap (40) which connects at least two uppermost plate stacks (32) to one another in an axial direction (8) in a material-locking manner.

The utility model discloses a front panel, outdoor unit and air conditioner, wherein the front panel comprises a plate body, an air guide ring and a retaining part, the plate body comprises a first part corresponding to the fan cavity of outdoor unit, the first part is provided with an air outlet, the air guide ring is convexly arranged on the inner side of the first part, and the retaining part is arranged on the outer side of the air guide ring. The periphery of the air guide ring is connected to the periphery of the air outlet, the enclosure part is arranged on the air guide ring in a surrounding mode, and the inner periphery of the enclosure part is attached to the outer periphery of the air guide ring. According to the technical scheme, the vortex formed on the inner side of the front panel and around the air guide ring is weakened, so that the working performance of the outdoor unit is guaranteed.

The invention discloses a soft magnetic composite material, a preparation method and application, the soft magnetic composite material comprises first powder, second powder, third powder and auxiliary materials, and the first powder comprises at least one of FeSiBNbCu, FeSiBMoCu and FeSiBVCu; the powder II and the powder III comprise at least one of alloy Fe-Si-Cr, Fe-Ni, Fe-Si, Fe-Si-Al, nanocrystalline powder or amorphous powder; the auxiliary material comprises at least one of a passivating agent, an insulating agent and a lubricating agent; the average particle size of the first powder is 20-30 microns, the average particle size of the second powder is smaller than 20 microns, and the average particle size of the third powder is smaller than or equal to 5 microns. According to the invention, through multi-particle-size compounding, a plurality of powder materials with different particle sizes and auxiliary materials are mixed according to a specific sequence, stirred and dried, so that the soft magnetic composite material with stable structure, high mechanical strength and high density can be obtained, and the saturation magnetization characteristic of a molded inductor product is improved.

This invention provides an immersion nozzle for continuous casting capable of suppressing the entrainment of protective slag into molten steel. It is an immersion nozzle for injecting molten steel from a tundish into a mold of a continuous casting machine, characterized by comprising: a molten steel rectifying section immersed in molten steel and disposed above the molten steel surface formed inside the mold; and a tubular section extending through the molten steel rectifying section in the vertical direction and discharging molten steel into the interior of the mold. The cross-sectional shape of the molten steel rectifying section, at least within a predetermined range in the casting direction from the molten steel surface to the molten steel, is an elliptical or streamlined shape having a major axis in the width direction of the mold. The molten steel rectifying section has a continuous shape in which the ratio of the minor axis b to the major axis a in the cross-sectional shape of the outer periphery of the molten steel rectifying section is 0.95 or less. The cross-sectional shape of the outer periphery of the tubular section is circular or elliptical in the width direction of the mold, and the ratio of the length β of another axis orthogonal to one axis substantially parallel to the long side of the mold to the length α of that axis is 0.90 or more and 1.1 or less.

The invention relates to sewage pipe network flow real-time monitoring equipment which comprises a detection pipe, a flow meter and a flow stabilizing cylinder, and the free end of the flow stabilizing cylinder points to a probe of the flow meter. A plurality of stable flow plates are arranged on the outer circumferential wall of the cambered surface of the flow stabilizing cylinder, a plurality of flow cutting plates are fixedly connected to the inner circumferential wall of the cambered surface of the flow stabilizing cylinder, one ends of the stable flow plates are hinged to the flow stabilizing cylinder, the other ends of the stable flow plates extend to be spaced from a probe of the flowmeter, and the stable flow plates are arranged in the length direction of the flow stabilizing cylinder and are longer than the flow stabilizing cylinder. The flow stabilizing cylinder is provided with a follow-up adjusting mechanism for increasing the included angle between the flow stabilizing sheet and the flow stabilizing cylinder when the flow speed of sewage in the detection pipe is increased. The flow velocity stability of the middle-area sewage flow output from the free end of the flow stabilizing cylinder can be improved, and the stabilized edge-area sewage flow forms a flow protection layer surrounding the periphery of the middle-area sewage flow, so that the influence of turbulent flow and vortex generated after scaling of the inner wall of a pipeline on the flow velocity of the middle-area sewage flow can be effectively reduced, and the service life of the middle-area sewage flow is prolonged. And the detection precision of the flowmeter is improved.