152results about How to "Improve the utilization of magnetic field" patented technology

The invention discloses a self-powered vehicle vibration damping device which comprises a vibration damping device body and a vibration damping device controller, wherein the vibration damping device body comprises a first cylinder body, a piston rod, a piezoelectric generating unit, a transmission force spring unit, a magneto-rheological damping unit and an electromagnetic induction unit; the piezoelectric generating unit comprises a plurality of piezoelectric modules, and a plurality of piezoelectric vibrators are inlaid in each piezoelectric module; the transmission force spring unit comprises an upper spring pressing plate, a lower spring pressing plate, a lower spring clamping seat, an upper spring clamping seat and a transmission force spring; the magneto-rheological damping unit comprises an outer cylinder, an inner cylinder, a permanent magnet protecting cover, an upper damp channel, a lower damp channel, a magnet exciting coil and a piston; and the electromagnetic induction unit comprises a leakage-proof magnetic sleeve, a second cylinder body, a permanent magnet and an electromagnetic induction coil. The invention further discloses a control method for the self-powered vehicle vibration damping device. The self-powered vehicle vibration damping device provided by the invention is high in energy-regenerative efficiency, good in work stability, high in reliability, can adjust the damping force in real time, and ensures that a vehicle is in an optimal vibration damping state.

The invention relates to an electromagnetic drive two-dimensional scanning micro mirror for laser scanning display. The micro mirror comprises a peripheral frame, an inner frame arranged in the peripheral frame, a vertical scanning twist beam connecting the peripheral frame and the inner frame, a micro reflecting mirror arranged in the inner frame and a pair of magnets. The peripheral frame is provided with a cantilever; the inner frame is connected to the cantilever of the peripheral frame through the vertical scanning twist beam; the cantilever is provided with a cantilever drive coil, the inner frame is provided with an inner frame drive coil, the magnets are arranged on two sides of the cantilever oppositely, and the magnetic induction lines produced by the magnets are perpendicular to the current directions of the cantilever drive coil and inner frame drive coil after powering. According to the micro mirror, the two groups of drive coils scanning in two directions are controlled independently, interference between two directions is reduced, large twisting angle can be acquired easily, the magnetic field utilization rate can be increased, and the drive scheme is simplified.

The invention discloses an exciter and a screen sounding device. The exciter comprises a housing, a vibrator assembly and a stator assembly. The interior of the housing forms a receiving cavity. The vibrator assembly comprises a vibrating portion and an elastic portion. The vibrating portion is suspended in the receiving cavity through the elastic portion. The vibrating portion comprises a first permanent magnet magnetized parallel to the vibration direction, and the first permanent magnet forms a middle avoiding space. The stator assembly includes a magnetically conductive core and a coil wound around the periphery of the magnetically conductive core, the magnetically permeable core portion is fixed in the accommodating cavity, the magnetically permeable core portion includes a support portion and a radial protrusion portion provided at one end of the support portion, the other end of the support portion is connected with the housing, a coil is wound outside the support portion and positioned between the housing and the radial protrusion portion, and the coil is positioned in the middle avoiding space and spaced apart from the vibration portion.

The invention relates to a high-energy consumption self-decoupling magnetorheological damper with damping force decoupling property and failure self-protection function. The damper not only has high energy consumption and output, but also can effectively prevent subsidence of magnetorheological fluid, therefore, the invention is suitable for civil engineering structures. The damper mainly comprises a master cylinder body (6), an auxiliary cylinder body (13), a main piston (8), two auxiliary pistons (23), a piston rod (25), and novel composite-structure energy accumulators (14 and 15). Permanent magnets (9) arranged in the main piston (8) and the two auxiliary pistons (23) can effectively prevent subsidence of magnetorheological fluid, and can still provide corresponding damping force under the condition of power supply failure to enhance the safety of the structure. Magnetic circuit guiding components improve the utilization factor of the magnetic field. A mechanical spring self-decoupling device is mainly operated on the condition that the damper is under low-frequency driving, thereby overcoming the disadvantage of low output of the damper under low-frequency driving.

The invention discloses a self-sensing magnetorheological damper adopting a spiral damping channel. The self-sensing magnetorheological damper comprises a working cylinder and a piston, wherein the piston is arranged inside the working cylinder and divides the working cylinder into a cavity I and a cavity II; the cavity I and the cavity II are filled with a magnetorheological material; an excitation coil and the spiral damping channel, which is used for enabling the magnetorheological material to flow in the cavity I and the cavity II, are arranged on the piston; the magnetic field of the excitation coil penetrates the spiral damping channel. According to the magnetorheological damper provided by the invention, the damping channel is a spiral damping channel, so that the effective length of the damping channel is lengthened, the magnetic field utilization ratio is increased, and the power consumption of the magnetorheological damper during adjustment is reduced.

The invention relates to a magnetic reselection device, in particular to an electromagnetically-focused concentration machine for concentrating magnetite, which comprises an ore supply hopper, an ore supply pipe, a tailing overflowing groove, a separation bucket, excitation coils, a water supply package, an ore concentrate funnel and an ore concentrate discharge valve. The separation bucket is internally provided with a plurality of layers of excitation coil with a waterproof ware-resistant protection layer from top to bottom by a bracket, the excitation coil at the upmost layer supplies a constant direct current, other excitation coils are grouped and sequentially switched on with the switching-on time and currents automatically or manually adjusted according to the overflowing density and the separation conditions, the upper part of the separation bucket is provided with a tailing overflowing density sensor, and an ore concentration density sensor is arranged between the ore concentrate funnel and the ore concentrate discharge valve at the bottom of the separation bucket. In machine, the utilization rate of the magnetic field is greatly improved, and lower-cost iron materials can be adopted for the separation bucket. By the aid of the control of the ore concentrate discharge valve, the circulating time adjustment of the separation magnetic field and the automatic control of the field strength, the aims of decreasing the manufacture cost of the device, saving the energy and ensuring the optimal separation effect are achieved.

The invention discloses an inner-channel vehicle suspension system magnetorheological damper, which comprises a cylinder barrel; a combined electromagnetic piston and a floating piston are arranged in the cylinder barrel in sequence from top to bottom; the combined electromagnetic piston divides the cavity chamber above the floating piston into an upper cavity chamber and a lower cavity chamber, which are filled with magnetorheological fluid; a bottom cover is arranged at the bottom end of the cylinder barrel; the bottom cover is respectively fixedly connected with an inflating and deflating valve and a lower lifting ring; a guide seat is arranged at the upper end of the cylinder barrel; the upper end of the guide seat tightly covers an upper end cover pressing the guide seat; the lower end of the guide seat is fixedly connected with a buffering block; the combined electromagnetic piston is fixedly connected with a piston rod penetrating through the guide seat and the upper end cover to extend outwards; the outer end of the piston rod is fixedly connected with an upper lifting ring of which the inside is provided with a wire outgoing groove. The inner-channel vehicle suspension system magnetorheological damper is simple in structure and low in manufacturing cost, can accurately adjust vehicle vibration generated by random excitation of a road face, and is high in work efficiency and work stability; the floating piston is enabled not to be clamped in the moving process up and down, and is stable when being used for pressure compensating; the liquid cannot easily leak in the work process.

The invention discloses a semi-active dynamic vibration absorber for magneto-rheological elastomers and a selection and installation method. According to the semi-active dynamic vibration absorber andthe selection and installation method, multiple layers of cross-shaped cross beams arranged in parallel are fixed to the positions below a bottom frame base located at the bottom of a railway vehiclein a suspended mode through four vertical magnetic conductive rods arranged vertically and penetrating through the four end parts of cross-shaped beam arms; multiple layers of stacked structures which are spaced from each other are formed between multiple layers of grooving vibrators and the cross-shaped cross beams; vertical mounting through holes are formed in the centers of the cross-shaped cross beams; the annular magneto-rheological elastomers are arranged between the mounting through holes and a connecting shaft of the multiple layers of grooving vibrators; the multiple layers of grooving vibrators can vibrate up and down relative to the bottom frame base in the axial direction of the mounting through holes; winding grooves are formed in the beam arms of the cross-shaped cross beams; and excitation coils are wound in the winding grooves. The semi-active dynamic vibration absorber has the advantages that the vibration absorption effect is good, the energy consumption is small, the structure is simple and compact, the installation is easy, the safety and the reliability are high, the utilization of the residual space under the railway vehicle is reasonable, and vertical wide-frequency vibration reduction can be carried out on a railway vehicle body which suffers form an abnormal vibration problem due to the fact that a railway is unsmooth.

A compression-shear mixed multi-layer magnetorheological elastomer shock absorber comprises a magnetic conductive tube mounted on a base, a piston mounted in the magnetic conductive tube, a magnet exciting coil mounted on the outer wall of a mounting seat arranged on the base as well as magnetorheological elastomers, wherein the magnetorheological elastomers comprise a shear type first magnetorheological elastomer and compression type second magnetorheological elastomers; the first magnetorheological elastomer is mounted between the piston and the magnetic conductive tube; a shock absorbing layer structure is mounted between the mounting seat and the piston and comprises the second magnetorheological elastomers and magnetic conductive plates, and the second magnetorheological elastomers and the magnetic conductive plates are arranged alternately. According to the compression-shear mixed multi-layer magnetorheological elastomer shock absorber, under joint action of the shear type magnetorheological elastomer and the compression type magnetorheological elastomers, the adjusting ranges of the rigidity and damping of the shock absorber are increased, the shock absorbing effect is enhanced, and the shock absorber can attenuate vibration load of different frequency and amplitudes.

An electromagnetic driving device comprises at least two magnets and at least one coil. Magnetizing directions of the magnets are the same or opposite and are perpendicular to the plane of the coil roughly, the magnets are arranged in a manner of keeping the same polarity opposite while reserving a gap between the magnets, and at least a part of the coil is disposed in the gap between the two magnets wich are arranged oppositely. An electromagnetic lens driving device comprises a frame cover, a lens support, a coil, at least two magnets and a spring, wherein at least a part of the lens support is mounted in the frame cover, the coil is mounted on the lens support, and the magnets are fixed on the frame cover. The sizes of a voice coil motor and a voice coil motor lens driving device are small, operation efficiency is high, the coil can be driven to move by a small quantity of current, and thus energy is saved while size is reduced.

The invention discloses a support skeleton for adjusting the inter-turn resistance of an uninsulated superconducting magnet and relates to the field of uninsulated superconducting magnet support skeleton. The support skeleton comprises a coil skeleton, a clamping and an adjusting device, and is characterized in that the coil skeleton is configured to provide a winding support for an uninsulated superconducting tape winding magnet; the clamping plate is in close contact with the magnet coil wound around the coil skeleton; the adjusting device changes the pressure between the magnet coils woundaround the coil skeleton by adjusting the relative position of the moving portion of the clamping plate so as to change the inter-turn resistance of the magnet. The invention also discloses a method of the support skeleton for adjusting the inter-turn resistance according to a charging delay requirement. The support skeleton avoids the problem that the inter-turn resistance is formed once and thesuperconducting strip cannot be reused in a traditional dipping method, and is simple and reliable in operation, visualized in operation process, and the inter-turn resistance can be adjusted according to actual needs.

The invention discloses an anti-shake camera module and an anti-shake camera device. The camera module comprises a shell, a lens assembly and a driving assembly, wherein the shell consists of an uppercover and a base, the lens assembly is movably fixed in the shell through a first spring piece, the driving assembly controls the lens assembly to deflect in two orthogonal directions perpendicular to a plane of an optical axis, the driving assembly comprises an annular magnet and deflection coils, the annular magnet is coaxial with the lens assembly, two polarities of the annular magnet face twoends of the lens assembly respectively and are used for driving the lens assembly to deflect, the deflection coils are arranged on the periphery of the annular magnet in two orthogonal directions, face different polarities of the outer side of the annular magnet and are parallel to each other, and the current directions of the two wires are opposite. The camera module is advantaged in that electromagnetic efficiency is high, and the size is small.

The invention relates to a semi-active suspended type lightning protection shock absorbing seat. The semi-active suspended type lightning protection shock absorbing seat comprises a seat and a chair back; the seat is fixedly connected with the chair back through an arc fixing frame; lifting rods are vertically arranged on the two sides of the seat; the top of each lifting rod is detachably connected with the top of a vehicle body; bottom stopping sheets are detachably connected to the bottoms of the lifting rods and arranged perpendicular to the lifting rods; magnetic fluid rheostat adjustingmechanisms are arranged under the lifting rods; the upper ends of the magnetic fluid rheostat adjusting mechanisms are fixedly connected with the bottoms of the corresponding sides of the seat; sensors are arranged between the tops of the lifting rods and the top of the vehicle body; the sensors are electrically connected with a controller; the controller is electrically connected with a power supply generator; and the power supply generator is electrically connected with the magnetic fluid rheostat adjusting mechanisms. The semi-active suspended type lightning protection shock absorbing seathas the advantageous effects that the assembling and disassembling are convenient; the floor space is small; by using magneto-rheological characteristics of magnetorheological fluids, variable rigidity and variable damping can be realized to be convenient for effectively absorbing impact loads; active adaptation to different vibrational excitation is strong; and a very good protection effect on the safety of vehicle-mounted personnel is realized.

The invention relates to an operating mechanism for a medium-high voltage distribution line circuit breaker, belonging to electrical equipment. The permanent-magnet operating mechanism comprises a movable shaft, coils and a permanent magnet, wherein the movable shaft is positioned at the axial lines of the coils; the permanent magnet is circular and fixed on the movable shaft, and the outer diameter of the permanent magnet is less than the inner diameter of each coil; the number of the coils is at least two; and the coils are coaxially arranged in a circular cylinder body. On the basis of the structure, the invention can also have the structure that the cylinder body can conduct magnetism and has an axial section which is in a hollow H shape, and both ends of the cylinder body are provided with an upper cover plate and a lower bottom plate which both can conduct magnetism. The invention strengthens the interaction among magnetic fields, increases the utilization ratio of the magnetic fields, realizes the idle work of the on-off state of the circuit breaker operating mechanism, optimizes the on-off state characteristics of the circuit breaker operating mechanism, enhances the controllability of the circuit breaker, has the advantages of simple structure and low cost, and enhances the reliability of the whole circuit breaker.

The invention relates to a magnetic control time-delay device which comprises a semi-closed iron core with an opening and a magnet exciting coil wound on the iron core. Magnetic poles are arranged on the two sides of the opening of the semi-closed iron core, the two magnetic poles correspond oppositely, an insulation box used for containing magneto-rheological plaster is fixed in the opening, the insulation box is fixedly arranged between the two magnetic poles, electrode slices are fixedly arranged on the two sides, corresponding to the magnetic poles, on the inner side of the insulation box respectively, the space between the two electrode slices is filled with the magneto-rheological plaster, the two electrode slices are respectively in full contact with the magneto-rheological plaster, and the magnet exciting coil, the iron core, the electrode slices and the magneto-rheological plaster form a closed magnetic circuit. The two electrode slices are respectively connected with a circuit access terminal through wires, and the two outgoing ends of the magnet exciting coil are respectively connected with a power source access terminal through wires. The device is simple in structure and good in reliability.

Disclosed are a rail transit non-contact power supply device with honeycomb-type coils and a power supply method of the rail transit non-contact power supply device. The power supply device comprises a pickup coil and a controller of a power supply station, wherein the pickup coil is arranged at the bottom of a locomotive. The controller is connected with an ADA converter, and the ADA converter is connected with a power supply coil buried below the earth surface of a track power supply section, wherein the power supply coil is formed by connecting a plurality of small power supply coil bodies in parallel, and the small power supply coil bodies are equal in size, are distributed below the earth surface of the whole track power supply section in a honeycomb mode and are in series connection with switching tubes respectively. The control ends of the switching tubes are connected with the controller. Signal receivers for detecting the pickup coil are evenly arranged on the center line of the earth surface of the track power supply section at intervals of the distance of a small power supply coil body and are connected with the controller. A signal generator is arranged on the pickup coil. The non-contact power supply device is high in power supply power and magnetic field utilization ratio, saves energy resources and obviously reduces electromagnetic radiation.

The invention discloses a novel stacked parallel structure NFC antenna applied to a mobile terminal. The antenna is applied to the mobile terminal and comprises a substrate, and a first wire and a second wire respectively arranged on a first surface and a second surface of the substrate, wherein the first wire and the second wire are identical in wire directions and are arranged parallelly, and the first wire and the second wire are communicated through conduction holes. The invention further discloses the mobile terminal equipped with the novel stacked parallel structure NFC antenna. The novel stacked parallel structure NFC antenna and the mobile terminal are advantaged in that the structure is compact and simple, antenna impedance is substantially reduced, current loss is reduced, a magnetic field utilization rate is effectively improved, and antenna performance is improved.

The invention discloses a magnetorheological damper embedded with multi-path communicating flow passages and belongs to the technical field of semi-active control vibration isolation. The two ends ofa cylinder body are provided with a front end cover, a rear end cover and a cup sleeve. Six magnetic poles are circumferentially arranged in the cylinder body. Independent field coils are wound aroundthe magnetic poles and are wound around the cylinder body in the bus direction of the cylinder body. Each magnetic pole is internally provided with a flow passage. A piston is in direct contact and coaxial with the inner wall of the cylinder body composed of the magnetic poles. A piston rod extends from upper and lower end covers, wherein the portion extending out of the upper end cover is connected with a connecting rod, an upper nut pressing plate and a lower nut pressing plate are arranged on the connecting rod, and a spring is arranged between the lower nut pressing plate and the upper end cover. According to the magnetorheological damper embedded with the multi-path communicating flow passages, the six magnetic poles are combined with the six embedded flow channels, wherein the six magnetic poles not only have a high proportion of effective acting area, but also can meet different requirements by respectively controlling the conducting/ interruption, direction and value of the coil current of each magnetic pole; and six-channel embedding can ensure that the damping adjustable multiple is greater than 20 and the volume is small.