17 results about "Magnetism" patented technology

The invention belongs to the technical field of gyroscopes and relates to a magnetic shielding method used for a magnetic resonance gyroscope. The active-passive magnetic shielding method includes 1) a step of passive shielding, namely a step of setting a passive shielding layer at the outside of the magnetic resonance gyroscope, with the shielding layer being a high-magnetic-permeability material, and 2) a step of active compensation, namely a step of setting an active compensation device inside a passive shielding device and outside a sensitive structure of the magnetic resonance gyroscope, wherein the active compensation device comprises an atom magnetometer, a three-dimensional magnetic field coil and a current source. The technical problem to be overcome is a problem that magnetic shielding methods at present cannot meet efficient environment magnetic field shielding requirements for small-size magnetic resonance gyroscopes. The method improves magnetic shielding performance on the base of not increasing hardware components of the magnetic resonance gyroscope.

The invention discloses a radial hybrid magnetic bearing of a slice rotor. The radial hybrid magnetic bearing is characterized in that the slice rotor is sleeved with a radial stator disc in a hollow manner, and the radial stator disc is composed of a radial stator cylinder and three radial stator pieces, and the three radial stator pieces are successively fixed on the inner wall of the radial stator cylinder along the axial direction; a first axial cavity is arranged between a first radial stator piece and a second radial stator piece, a second axial cavity is reserved between the second radial stator piece and a third radial stator piece, and radial control coils are arranged in the two axial cavities; the slice rotor is composed of a rotor magnet yoke and a permanent magnet, the rotor magnet yoke is coaxially closely nested outside the permanent magnet, and the permanent magnet is of a hollow cylinder shape and is radially filled with magnetism; the permanent magnet provides static bias flux, the radial control coils provide radial control magnetic flux, and the radial control magnetic flux and the static bias flux are overlapped at radial gaps. The radial hybrid magnetic bearing provided by the invention has the advantages that a radial magnetism filling permanent magnet is adopted, the spaces of the radial control coils are reduced, and the radial bearing capacity is increased.

A permanent magnetism double-stator synchronous machine is provided, wherein, a rotor is a multipolar drag cup rotor consisting of a tegular permanent magnetic steel, a non-magnetic bracket and a rotating shaft; the inner annulus and the outer annulus of the magnetic steel of the rotor are respectively provided with a bushing and a lantern ring; the single end of the drag cup rotor is fixed on the rotating shaft, and a fan is arranged on the rotor; an air passage is arranged on the bracket and between the bushing and the rotating shaft; the four corners of a square housing fixing an outer stator core are provided with air chutes; a left end closure and a right end closure are provided with vents correspondingly. The invention has the advantages of small cubage of the machine, minimal armature reaction and moment of inertia, convenient manufacturing and simple structure.

The invention discloses a method for comprehensively recycling sodium, aluminum and iron from red mud. The red mud is mixed with an additive to obtain a raw material, the mixed raw material is subjected to calcination to obtain clinker, the clinker is added to an alkaline adjustment liquid for leaching, slid-liquid separation is performed, and leachate containing aluminum and sodium and magnetic leaching residues are obtained; the additive is a mixed additive composed of a calcium-series additive, a magnesium-series additive and a sodium-series additive. According to the technical scheme, no reducing agent needs to be added, hematite or hematite is converted as magnesioferrite with high magnetism through the magnesium-series additive and enters the leaching residues, and then an iron ore concentrate product is obtained through magnetic separating. In the technical scheme, the atmosphere control process and generation of a great quantity of polluting atmosphere in the current iron recycling process are avoided. In the method, the aluminum recycling rate is 85%, the sodium recycling rate is 92% or above, the sodium content in final residues is lowered to 1% or below, the iron grade of the iron ore concentrate is 50-55%, and the recycling rate is about 70%.

The invention discloses a printing machine anti-sticking mechanism, which comprises a paper discharge opening of a printing machine body, a paper collecting table and a control panel, wherein the control panel is positioned on an outer panel arranged beside the paper discharging opening of the printing machine body, a first magnet is respectively embedded in four corner parts of the paper collecting table, in addition, the four first magnets are in a rectangular shape, four support frames are vertically placed on the paper collecting table, the four support frames are respectively positioned above the four first magnets, one second magnet is respectively embedded in the upper part and the lower part of each support frame, a bottom plate is horizontally placed above the four support frames, a third magnet is respectively embedded in the four corner parts of the bottom plate, the third magnets and the second magnets are in one-to-one corresponding arrangement, the first magnets and the third magnets have the same magnetisms, and the first magnets and the second magnets have the opposite magnetisms. The printing machine anti-sticking mechanism has the advantages that the support frames and the bottom plate are arranged by using the magnetism, the structure is firm, the problem of mutual adhesion between paper positioned at the lower side is effectively prevented, the printing quality is improved, the labor is saved, in addition, the structure is simple, the manufacturing is convenient, the manufacturing cost is low, and the printing machine anti-sticking mechanism is suitable for practical use.

The invention discloses efficient energy-saving electromagnetic equipment for extracting natural gas and belongs to natural gas extraction techniques. An electromagnetic coil of the efficient energy-saving electromagnetic equipment is arranged outside a gas pump shell. A protective shell is fixed to the gas pump shell. A gas inlet pipe is fixed to the lower end of the gas pump shell. A gas outlet valve is fixed in a center hole of the gas pump shell. An iron core spring and a magnetism-induced piston are arranged in the gas pump shell. The iron core spring is pressed on the magnetism-induced piston. A natural gas inlet channel of a gas inlet cavity is sealed through a sealing ball or a sealing cone. A natural gas inlet channel of a squeezing cavity is sealed through a gas passing sealing plate. A fixed plug is fixed in a plug hole in the magnetism-induced piston. A sealing ball or a sealing cone is installed in an internal conical hole. A containing hole is formed in the lower end of the magnetism-induced piston. The efficient energy-saving electromagnetic equipment for extracting the natural gas is compact in structure, small in vibration, high in electric energy utilization rate, strong in power and suitable for extracting the natural gas from a natural gas well; the industrial market prospects are good, the commercial value is high, and both manufacturing and using are quite convenient.