57results about How to "Play a magnetic role" patented technology

The invention discloses a permanent magnet. The permanent magnet comprises a columnar inner magnet, a first columnar side magnet and a second columnar side magnet that are made from a permanent magnetic material; the first columnar side magnet is coaxially arranged on the external of the columnar inner magnet; the second columnar side magnet is coaxially arranged on the external of the first columnar inner magnet; the heights of the columnar inner magnet, the first columnar side magnet and the second columnar side magnet are entirely or partially different, and an approximate concave curved surface is formed; the magnetization direction of the columnar inner magnet is an axial direction; a first angle is formed between the magnetization direction of the first columnar side magnet and the axial direction; a second angle is formed between the magnetization direction of the second columnar side magnet and the axial direction; and the second angle is greater than or equal to the first angle. The invention also discloses a magnetic apparatus used for a nuclear magnetic resonance imaging system.

The invention discloses an electric cooker with fresh-keeping and refrigerating functions. The electric cooker comprises a cooker body, a cooker cover arranged on the cooker body as well as a pot body, an electromagnetic heating furnace core, a refrigerating and fresh-keeping device and a controller which are arranged in the cooker body, wherein the electromagnetic heating furnace core comprises a furnace core casing and an electromagnetic heating coil, and an electromagnetic coil part is formed after the electromagnetic heating coil wounds around the furnace core casing and corresponds to a circular arc transition part of the pot body; the electromagnetic heating coil is electrically connected with a heating control end of the controller; the refrigerating and fresh-keeping device comprises a semi-conductor refrigerating module and a heat dissipating device, a cold surface of the semi-conductor refrigerating module is attached to the bottom wall of the pot body, the heat dissipation device is arranged on the hot surface of the semi-conductor refrigerating module, and the semi-conductor refrigerating module is electrically connected with a refrigerating control end of the controller. The electric cooker also has fresh-keeping and refrigerating functions except conventional functions and can cool and refrigerate the pot body and food materials in the pot body, so that the food materials in the pot body can be kept fresh and refrigerated.

The invention discloses a silicon steel sheet superposed force sensor, which comprises a force bearing tube, wherein an excitation magnetic core formed by superposing silicon steel sheets is installedin the force bearing cylinder, four excitation magnetic poles are formed on four arms of the excitation magnetic core, and an excitation coil is installed on the periphery of each excitation magneticpole; an induction magnetic core formed by superposing silicon steel sheets is installed in the force bearing cylinder, four induction magnetic poles are formed on four wing ends of the induction magnetic core, an excitation coil is installed on the periphery of each induction magnetic pole, the excitation magnetic core is vertically installed in the middle of the induction magnetic core, and thefour excitation magnetic poles form two pairs of excitation magnetic poles which are radially and symmetrically arranged. When the force bearing cylinder is subjected to heavy load, component forcesare applied to the two pairs of excitation magnetic poles in the direction of the excitation magnetic poles, both the two pairs of excitation magnetic poles deform, and two symmetrical magnetic fieldsare biased. Since the excitation magnetic core and the induction magnetic core are formed by superposing the silicon steel sheets, the self-inductance coefficient is increased, and the magnetic conduction effect is achieved; in addition, since the two magnetic fields are biased and superposed, the output amplitude of an induction current generated in the induction coil is increased, and the sensitivity is improved.

The invention discloses portable electrical variable detection equipment with a quick plug, which belongs to the technical field of electrical variable detection, and is characterized in that the quick plug used for being connected with a current detection sensor and a voltage detection sensor is arranged on the detection equipment and consists of a mother joint and a son joint which are correspondingly arranged; the flexible electromagnet on the mother connector is used for magnetically attracting the flexible auxiliary magnet on the son connector after being started, rapid connection betweenthe son connector and the mother connector is achieved, the current detection sensor and the voltage detection sensor are used for detecting current and voltage, detection results are transmitted tothe flat plate, the flat plate is stored in the detection plate, carrying is convenient, and when the flexible electromagnet is disconnected, the quick plug can be disconnected, a port does not need to be manually replaced for testing, flexible plugging of the quick plug is effectively achieved through cooperation of the flexible electromagnet and the flexible auxiliary magnet, and the situation that the service life of the quick plug is shortened after the child connector and the mother connector are repeatedly plugged and unplugged is avoided.

The invention discloses a saturated gas expansion type self-developing water surface oil stain adsorption ball, which belongs to the technical field of water body oil stain adsorption; through an adsorption ball body formed by a lower oil absorption part and an upper oil absorption part, when the lower oil absorption part reaches adsorption saturation, a lower oil hydrolysis half bag is subjectedto oil hydrolysis; a lower water absorption column, a water guide body and an upper water absorption column are matched; water is guided to a magnetic shielding hydrolytic capsule, magnetic shieldingparticles formed in the magnetic shielding hydrolytic capsule are dispersed after the magnetic shielding hydrolytic capsule is hydrolyzed; at the moment, a magnetic attraction block plays a magnetic attraction role on a magnetic ball, the adsorption ball body is turned over, alternate adsorption of the two oil adsorption parts is achieved, the adsorption area is expanded, and after an oil adsorption layer of the upper oil adsorption part is adsorbed to be saturated, the upper oil hydrolysis half capsule is oiled. The effervescent gas hydrolysis layer is exposed outside, the upper water absorption column arranged in the water body is matched with the water guide body to guide water to the effervescent gas hydrolysis layer, the effervescent gas hydrolysis layer disintegrates when encountering water to generate carbon dioxide, the carbon dioxide is guided into the color development ball to react with the acid-base indicator for color development, and technicians are effectively reminded that the upper oil absorption part and the lower oil absorption part both reach the saturation state.

The invention discloses a low-loss type injection mold, and belongs to the technical field of molds. Heat storage bags for collecting waste heat are arranged at four corners of the bottom end of a mold core, the heat storage bags are connected with the mold core through heat insulation rods, upper heat conductors and lower heat conductors which extend into a conduction seat and the heat storage bags respectively are mounted in the heat insulation rods, and before water cooling forming, by means of the magnetic attraction effect, the lower heat conductor penetrates through a heat insulation plate to be connected with the upper heat conductor, heat is conducted through the upper heat conductor and the lower heat conductor and stored in the heat storage bags, heat recovery is achieved, preliminary cooling of the mold core is achieved, water cooling operation of a plurality of water cooling pipes is matched, the cooling effect on the mold core is further improved, cooling forming of a product is realized, and in the water cooling process, the lower heat conductor and the upper heat conductor are disconnected, heat in the heat storage bags cannot be lost due to water cooling of the mold core, the heat stored in the heat storage bags can be used for preheating during next pouring, and energy conservation and low loss are achieved.

The invention discloses a superconducting induction heating device capable of simultaneously heating multiple workpieces. The superconducting induction heating device comprises a magnetic conductive iron core, a superconducting coil and iron yokes, wherein the superconducting coil surrounds the magnetic conductive iron core. The magnetic conductive iron core is a columnar iron core, an upper magnetic conductive plate is arranged at an upper end of the magnetic conductive iron core, and a lower magnetic conductive plate is arranged at a lower end of the magnetic conductive iron core; the superconducting coil is connected with an external power supply through a current lead so that the superconducting coil bears a current to generate a magnetic field; each uniform iron yoke is connected withthe upper magnetic conductive plate and the lower magnetic conductive plate, an air gap is arranged in each iron yoke, and the air gaps are used for placing workpieces to be heated; and after the workpieces to be heated are placed in the air gaps, the magnetic conductive iron core conducts the magnetic field generated by the superconducting coil to the multiple iron yokes connected in parallel soas to form multiple series-parallel connection mixed magnetic circuits. The device provided in the invention can heat the plurality of workpieces to be heated at the same time, heating efficiency ofthe workpieces to be heated is improved, and the device has a better adjusting function corresponding to a heating process and power through the mixed magnetic circuits.

The invention relates to a radial magnetic bearing structure and a multi-degree-of-freedom magnetic levitation mechanism containing the structure. The structure comprises an upper rotator assembly, alower rotator assembly and a stator assembly. The structure is simple, processing is convenient, and the assembly precision is high. The upper rotator assembly and the lower rotator assembly form a high-strength permanent even perpendicular main magnetic field along the axial direction; the magnetic steel surfaces of the upper rotator assembly and the lower rotator assembly are wrapped with a layer of magnetic conductive materials, so an even flat magnetic field with a large occupation rate can be formed in a magnetic gap to achieve the magnetism gathering effect. The stator assembly is of a hollow disc structure and built-in coils in the stator assembly are radially utilized in pairs in the perpendicular even magnetic field to form a couple, so the output force of the coils during motionsin the magnetic gap is even, the linear degree is high, and the high rigidity and low disturbance index requirements of a radial magnetic bearing are realized. The structure solves the difficulty that existing the magnetic force of magnetic bearings is greatly influenced by changes of magnetic gaps and the power consumption is large under large load bearing force and realizes the advantages of good magnetic force linear degree, high rigidity and lower power consumption. The structure belongs to the field of astrovehicle magnetic control systems.

The invention discloses a stamping die with a double-cooling type forming punch, and belongs to the technical field of stamping. The stamping die is characterized in that an upper cooling cavity and alower cooling cavity filled with cooling liquid are arranged in a mold core and the punch respectively, and the upper cooling cavity and the lower cooling cavity communicate with each other through symmetrically-arranged air supply guide columns; air circularly flows between the upper cooling cavity and the lower cooling cavity through the air supply guide columns, and matching of air cooling andwater cooling is achieved, so that the cooling effect on the die is effectively improved; in addition, a magnetic attraction plate is arranged inside the punch, the bottom end of the magnetic attraction plate magnetically attracts a plurality of magnetic nitratine particles, after die assembly, water-soluble magnetism-starting trigger bodies located at the bottom ends of the air supply guide columns disintegrate when meeting water to trigger an on-off switch of the magnetic attraction plate, after the magnetic attraction plate is powered off, the plurality of magnetic nitratine particles fallinto the cooling liquid in the upper cooling cavity, and the cooling liquid is gradually cooled and partially frozen when meeting the magnetic nitratine particles; and on one hand, the cooling effectof the punch on the die is directly improved, on the other hand, a cooling effect on the circularly flowing air is achieved, and rapid cooling of the die is achieved.

A wireless charging device for laptops relates to wireless charging. The wireless charging device for laptops is smaller and lighter, and is flexible. A receiving coil can be either installed outside the bottom of a laptop or built in the laptop at design time. The wireless charging device comprises a high-frequency power supply, an electric energy transmitting coil, an electric energy receiving coil, and a post-processing circuit. DC power is connected to the input end of the high-frequency power supply. The two pins of the electric energy transmitting coil are connected with the output end of the high-frequency power supply. The two pins of the electric energy receiving coil are connected with the input end of the post-processing circuit. The output end of the post-processing circuit is connected with the charging port of a laptop.

The invention discloses a hybrid magnetic circuit superconducting induction heating device, which comprises a magnetic conductive iron core, a superconducting coil arranged around the magnetic conductive iron core and a plurality of parallel iron yokes distributed around the magnetic conductive iron core in the circumferential direction, wherein the upper end of the magnetic conductive iron core is provided with an upper magnetic conductive plate, and the lower end of the magnetic conductive iron core is provided with a lower magnetic conductive plate; the superconducting coil is connected with an external power supply through a current lead to enable the superconducting coil to bear current so as to generate a magnetic field; a first air gap for placing a workpiece to be heated is formedbetween the upper end surface/lower end surface of each iron yoke and the side wall of the upper magnetic conductive plate/lower magnetic conductive plate; after the to-be-heated workpiece is placed in the first air gap, the magnetic conductive iron core conducts the magnetic field generated by the superconducting coil to the multiple iron yokes connected in parallel so as to form multiple series-parallel connection mixed magnetic circuits. The device provided by the invention can heat a plurality of workpieces to be heated at the same time, the heating efficiency of the workpieces to be heated is improved, and the hybrid magnetic circuit enables the device to have a better adjusting function corresponding to the heating process and power.

The invention discloses a fixed-point type soil deep nutrient conveyor, and belongs to the technical field of soil conservation. Fertilizer is stored through a plurality of storage cylinders provided with storage cavities; during use, the conveyor is buried in a soil deep layer part, electromagnets at corresponding magnetic driving plates are started, and the electromagnets magnetically attract and pull magnetic push plates corresponding to the electromagnets in position; the magnetic push plates slowly move outwards under the action of extension springs and fertilizer resistance to extrude and push fertilizer towards one side of an outer oval permeable layer, and the fertilizer slowly seeps into soil through the outer oval permeable layer, and therefore, implementation of multi-point, fixed-point and deeper delivery of the fertilizer into soil is realized; and when follow-up material supplementation needs to be carried out, the electromagnets are turned off, the magnetic pushing plates retreat under the rebound action of the extension springs, then material supplementation is carried out into the storage cavities through embedded rods and conveying pipes, the materials are recycled, the fertilizer is slowly released, and the fertilizer is not prone to volatilization, and the fertilizer can be more easily and completely absorbed by soil.

The invention discloses a breathable head-mounted Bluetooth headset, and belongs to the technical field of Bluetooth headsets. A plurality of breathable air holes are formed in a receiver, then a breathable bag and a heat conduction bag are vertically distributed, the heat conduction bag is used for absorbing heat generated in the working process of the receiver, then the heat is transferred to an internal heat floating ball, the heat floating ball expands after absorbing certain heat, so that buoyancy is increased, the heat floating ball floats upwards, and the breathable bag on the upper side is extruded, air accumulated in the breathable bag is exhausted, active ventilation in the breathable air holes is achieved, and meanwhile heat on the heat floating ball is dissipated to the outside through a magnetic heat conduction umbrella and a outer heat conduction piece to achieve cooling. After cooling, the heat floating ball sinks and resets after restoring the original buoyancy, the breathable bag also restores the shape and absorbs external air for filling, the repeated breathable action of the breathable bag can be realized by repeating the actions, and the breathability of the receiver and the ears is obviously improved.

The invention discloses a turning belt conveyor with a chain wheel convenient to replace, and belongs to the technical field of belt conveyors. An arc-shaped driving frame with a transmission chain wheel set is installed on the inner ring side of an inner arc-shaped frame, the inner end of a rotating shaft connected to a taper roller extends into the inner arc-shaped frame, after embedded installation, a plurality of transmission parts on the transmission chain wheel set correspond to a plurality of rotating shafts in a one-to-one mode, magnetic attraction connection between the transmission parts and the rotating shafts is achieved through pushing and promoting of a pneumatic magnetic pushing body, a driving motor and a driving gear set are matched to drive one transmission part, the transmission parts are in transmission connection through the transmission chain, so that a plurality of taper rollers drive the conveyor belt to convey, by means of integral detachable butt-joint type magnetic attraction connection, installation does not need to be conducted through a traditional fixing mode, installation is easy and convenient, during disassembly, the pneumatic magnetic pushing body is reutilized to retreat to be separated from the rotating shafts, then the arc-shaped driving frame is disassembled outwards, and the chain wheel in the arc-shaped driving frame can be replaced.