4results about How to "Suppress eddy current" patented technology

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 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.