60results about How to "Not easy to demagnetize" patented technology

The invention provides an aroma massage magnet therapy moxibustion rod which comprises a moxibustion head component, a connection component, a screw joint, an outer pipe, an inner pipe, a swath shrinking clamp component, a thrusting component, a push button and a sealing cover, wherein the moxibustion head component comprises a moxibustion head which is internally provided with a magnetic ring; the moxibustion head component and the connection component are magnetically connected, and the magnetic connection enables the moxibustion head component and the connection component to be simultaneously rolled and plugged; the connection component is connected with the upper part of the screw joint through threads; the lower part of the screw joint is connected with the upper end of the outer pipe through a thread; the swath shrinking clamp component and the thrusting component are tightly matched and connected; the push button passes through a vertical elongated push button slide way hole on the wall of the outer pipe and a vertical elongated push button slide way hole on the wall of the inner pipe and is connected with the thrusting component. The aroma massage magnet therapy moxibustion rod realizes safety, small size, simplicity, convenience and multiple functions, saves swaths and has inimitable advantages compared with the same products of the prior art.

The invention relates to a ball float type liquidometer with vernier display. The ball float type liquidometer comprises a ball float chamber and a ferromagnetic spherical floating ball arranged therein, a vernier outside the ball float chamber, a calibrated scale and a vernier guide rail. The vernier comprises magnetic steel, a frame and a rolling system which is horizontally fixed and sleeved in the frame; the rolling system comprises rolling wheels which are provided with radial grooves along a circumferential surface, rolling bearings and shafts; the magnetic steel is disposed between the ball float chamber and the frame and is fixed outside one side surface close to the ball float chamber on the frame, and the magnetic pole of the magnetic steel is right oriented towards the floating ball; the vernier guide rail is sleeved in the frame and is disposed between the magnetic steel and the rolling system; and the rolling system enables the rolling wheels to roll vertically along the vernier guide rail at groove positions through a magnetic coupling force between the magnetic steel and the floating ball. The ball float type liquidometer is simple and scientific in structure, reliable in application performance, easy to manufacture and low in cost, reduces defects in the prior art and effectively meets needs in correlation fields.

The invention relates to the field of coatings, and discloses a superstrong magnetic coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30-50 parts of film-forming resin, 50-450 parts of permanent magnet powder, 30-50 parts of diluents, 1-3 parts of a defoaming agent, 3-5 parts of a coupling agent and 3-10 parts of a toughening agent. The preparation method includes the following steps that magnetizing operation is performed on the permanent magnetic powder; primary stirring operation is performed on the permanent magnetic powder, the diluent, the defoaming agent, the coupling agent, the toughening agent and part amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain mixed liquid; andsecondary stirring operation is performed on the mixed liquid and the remaining amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain the superstrong magnetic coating. The coating has higher magnetic powder content and higher magnetic absorption performance, can attract hard magnetic materials such as magnets, and can attract soft magnetic materials such as iron, cobalt and nickel, and the application range of magnetic coatings is greatly expanded.

The invention discloses a permanent magnet generator rotor which comprises a barrel-shaped magnet yoke, a magnet yoke table, tegular permanent magnets, a wheel spoke and a rotating shaft, wherein thepermanent magnets and the magnet yoke are fastened on the barrel-shaped magnet yoke by non-magnetic stainless steel bolts, the permanent magnets are arranged at the outermost edge of the rotor, and the polarities of the permanent magnets are alternatively arranged along the circumference. The magnet yoke table reduces the magnetic-flux leakage between the adjacent magnets and improves the utilization ratio of the permanent magnets. The rotor has reasonable magnetic circuit design, simple structure, convenient installation and less permanent magnet consumption, and is especially suitable for large-size wind-driven generators with low rotating speeds.

The invention discloses a modified magnetic nanoparticle, a preparation method thereof, a non-polar solvent-based magnetic liquid, and a preparation method and an application of the magnetic liquid. The preparation method of the modified magnetic nanoparticle comprises the following steps: preparing a Fe3O4 magnetic nanoparticle; carrying out a sol-gel reaction on the Fe3O4 magnetic nanoparticle and a silicon source to obtain a silica-coated magnetic nanoparticle, mixing the silica-coated magnetic nanoparticle with ethanol and ammonia water, and uniformly stirring under a 20-75 DEG C water bath condition to obtain a magnetic mixed solution; and adding a modifying solution into the magnetic mixed solution at a certain speed, and carrying out a modification reaction. The modified magnetic nanoparticle is uniform in particle size and morphology distribution and controllable in particle size, has good dispersity in polar solvents and non-polar solvents, can form a photonic crystal structure, has good magnetic properties, optical properties and chemical stability, can be used for preparing photonic crystals, electronic paper and the like, and has a huge application prospect in the fields of electronics, optics, chemical engineering and the like.

The invention discloses a permanent magnet type magneto-rheological vibration isolator with adjustable rigidity damping. The magneto-rheological vibration isolator comprises a magnetism isolation component, two rigidity adjusting components with the same structure and two damping adjusting components with the same structure; the magnetic isolation component specifically comprises a magnetic isolation base, a cross magnetic isolation plate and an outer sleeve, wherein the cross magnetic isolation plate is fixed on the magnetic isolation base, the outer sleeve is arranged outside the cross magnetic isolation plate, the cross magnetic isolation plate is used for dividing the magnetic isolation component into four independent regions, the independent regions of the two opposite angles are the rigidity adjusting components, and the damping adjusting components are arranged in two independent regions adjacent to the rigidity adjusting components. According to the permanent magnet type magneto-rheological vibration isolator with adjustable rigidity damping, and permanent magnet materials with relatively large difference are formed by utilizing the two magnetic properties of a neodymium-iron-boron and a aluminum-nickel-cobalt to form a hybrid permanent magnet, and a controllable magnetic field is provided for the two magnetic sensitive viscoelastic materials, and therefore, a magnetic field with an adjustable size can be superimposed on the basis of a constant magnetic field by combining the characteristics of the two materials.

The invention belongs to the field of A47L1/00 and particularly discloses an automatic glass scrubbing device. The automatic glass scrubbing device comprises a cleaning brush and further comprises an air cylinder, a piston, a push rod, a first magnetic part, a second magnetic part and sliding rails fixed to the left side and the right side of glass. The cleaning brush is arranged on the sliding rails in a sliding manner. The piston is arranged in the air cylinder in a sliding manner. Fluoro trichloromethane is arranged between the piston and the bottom of the air cylinder. The upper end of the push rod is fixed to the cleaning brush, and the lower end of the push rod is fixed to the piston. The first magnetic part and the second magnetic part are fixed to the upper end and the lower end of glass correspondingly. The cleaning brush is provided with an iron block capable of being attracted to the first magnetic part and the second magnetic part. According to the scheme, by means of the fluoro trichloromethane and the character that the environment temperature changes, no extra power device is needed, cleaning of the glass can be achieved, energy is saved, and in addition, operation is convenient.

The invention provides a preparation method of paper with magnetic characteristics, in particular to the paper with the magnetic characteristics, which is prepared by filling magnetic inorganic materials into the cell cavities of paper pulp fibers. The preparation method comprises the following steps of: firstly, smelting boron oxide, aluminum oxide, silicon oxide rare metal oxide and the like serving as raw materials at a high temperature to prepare magnetic inorganic material grains; and then, by utilizing a papermaking process, filling the magnetic inorganic material grains into cell cavities so as to prepare the paper with the magnetic characteristics. The paper prepared by the invention belongs to a renewable resource and has the magnetic characteristics including magnetic responding, magnetic recording and the like, so that the paper can be applied to special paper products needing special identification, such as invoice paper, packaging paper and handwriting paper. In the paper preparation process, special equipment is not needed, the operation is simple and the industrial production is easy to realize; and the magnetism is permanent so that the paper is not easy to degauss and cannot be counterfeited easily.

The invention belongs to the field of welding devices, and particularly discloses a straight seam automatic welding device. The straight seam automatic welding device comprises a machine frame and a welding structure; the machine frame is provided with a workbench; the middle of the workbench is provided with a strip-shaped groove, the strip-shaped groove coincides with the moving direction of a welding gun, and a positioning plate is located in the strip-shaped groove and can slide up and down along the strip-shaped groove; the two sides of the workbench are provided with pushing mechanisms correspondingly; two side parts of the positioning plate are provided with slide grooves, and each slide groove is internally and slidably connected with a slide rod; the positioning plate is providedwith a cavity, and a vertical column is arranged in the cavity; the upper portion of the vertical column is rotationally connected with an electro-conductive first ring and an electro-conductive second electro-conductive; the slide rods are connected with the first ring/the second ring through connection rods; the surfaces, abutting against each other, of the first ring and the second ring are provided with insulating layers, and the insulating layers of the first ring and the second ring are provided with electro-conductive sections; and the workbench is internally provided with a control structure for controlling the positioning plate to move downwards, and the first ring and the second ring are located in a circuit of the control structure. The straight seam automatic welding device canachieve automatic aligning during welding, and manual operation is reduced.

The invention provides a liquid-cooled permanent magnet coupler. The liquid-cooled permanent magnet coupler comprises two groups of magnetic disks which are arranged oppositely. Conductive disks are compressed tightly on the opposite surfaces of the magnetic disks through a mould pressing technology. The surfaces, close to the magnetic disks, of the conductive disks are provided with cooling liquid flow channels, liquid grooves, liquid inlet holes and liquid outlet holes are formed in the magnetic disks, the liquid grooves are communicated with the liquid inlet holes, cooling liquid enters the liquid inlet holes under the effect of centrifugal force after entering the liquid grooves though a cooling oil pipe, and the liquid inlet holes and the liquid outlet holes are communicated with the cooling liquid flow channels. Through the liquid-cooled permanent magnet coupler, heat generated on the conductive disks by eddy currents can be taken away timely, the temperature of the conductive disks and the temperature of the magnetic disks can be controlled to be at a low degree, and magnets are not prone to demagnetization. Thus, noise generated when equipment runs is reduced.

The invention relates to a float-type liquidometer with the vernier display function. The float-type liquidometer comprises a float chamber, a float inside the float chamber, a vernier outside the float chamber, a guide rail and a dividing rule. The vernier is a piece of disc-shaped or cylindrical magnetic steel, the axis of the vernier is parallel to the ground, and the magnetic poles of the vernier are located in the direction of the central axis. Under the magnetic action between the floater and the vernier, the circumferential surface of the vernier makes rolling contact with the outer wall of the float chamber. The guide rail comprises two parallel tracks perpendicular to the ground. The tracks are oppositely arranged on the outer sides of the two axial end faces of the vernier and attached to the end faces of the vernier so that the vernier can roll up and down along the outer wall of the float chamber between the tracks under the magnetic action. The float-type liquidometer with the vernier display function is further provided with a closed vernier chamber adjacent to the float chamber. The liquidometer has the advantages of being simple in structure, reliable to use, convenient to maintain, low in manufacturing cost and wide in application range.

The invention discloses a hybrid stepping motor with U-shaped permanent magnets embedded into a stator and belongs to the field of hybrid stepping motors. The hybrid stepping motor comprises a statorand a rotor which are formed by laminating silicon steel sheets, wherein a plurality of rotating teeth are uniformly distributed on the outer circumference of the rotor; the rotor comprises a rotor core and a rotating shaft; the stator comprises a stator core, stator windings, permanent magnets and an insulator; magnetic poles are distributed on the inner circumference of the stator core; five small teeth which are the same as the rotor in tooth pitch are distributed on a pole shoe of each magnetic pole; one phase of stator winding is arranged on the pole shoe of each magnetic pole; permanentmagnet slots are arranged in a yoke of the stator core at intervals of two magnetic poles; the permanent magnets are put into the corresponding permanent magnet slots; N poles and S poles of the permanent magnets are clung to the corresponding magnetic poles separately; and the permanent magnets are alternately arranged in a certain order. The permanent magnets are arranged in the stator core through the U-shaped slots, so that the structure of the rotor is simple, the processing difficulty of the motor is reduced, the hybrid stepping motor is suitable for high-speed operation, good in heat dissipation, not easy to demagnetize and easy to replace, magnetic fields generated by the permanent magnets are radial, and the utilization rate of the permanent magnets is high.

A permanent magnet comprises: 20-50 parts of iron powder, 15-20 parts of permalloy powder, 5-10 parts of mild steel powder, 2-6 parts of cemented carbide powder, 12-19 parts of aluminium magnesium alloy powder, and 1-3 parts of metal zirconium powder. The manufacture method comprises: uniformly mixing the iron powder, the permalloy powder, the mild steel powder, the cemented carbide powder, the aluminium magnesium alloy powder, and the metal zirconium powder, and placing the mixture in a mould with a set shape; implementing orientation regulation of the alloy powder by applying an alternating magnetic field with a constant amplitude and 50Hz of frequency on the outer side of the mould, and slightly shocking the mould while regulation to help the powder to turn; and carrying out compression moulding. The permanent magnet provided by the method has advantages of good quality, and not easy demagnetization and failure, and can better guarantee production and life.

The invention discloses a tumor magnetic field restraining and treating device. The tumor magnetic field restraining and treating device comprises a treating bed, a housing arranged at a bed head position of the treating bed, a driving motor arranged in the housing and a permanent magnet, wherein the permanent magnet is arranged on the right side of the driving motor, in the housing, and is cylindrical; a rotating shaft is arranged at a cylindrical shaft center of the permanent magnet; a shaft hole which cooperates with the rotating shaft is formed in one end of the inner part of the housing;the driving motor is fixedly connected with one end relative to the shaft hole, of the housing; and the cross section of the housing adopts a rounded rectangular cylindrical structure. The tumor magnetic field restraining and treating device disclosed by the invention is simple in structure and stable in operation; besides, a patient can receive magnetotherapy on the bed, and the using is convenient; and the permanent magnet is manufactured by high-performance neodymium- iron- boron materials, so that the tumor magnetic field restraining and treating device has excellent magnetic performance and favorable mechanical characteristics, and is notable in magnetotherapy effects.

The invention discloses an efficient tricycle driving system which comprises a motor on a tricycle frame and a driver used for controlling the motor to drive and operate, the motor adopts a salient pole permanent magnet synchronous motor beneficial to flux weakening control and comprises a stator assembly and a rotor assembly which are in electromagnetic induction connection, and the stator assembly comprises a stator iron core and a winding. The rotor assembly comprises a rotor iron core and permanent magnet steel. The speed regulation range of the salient pole permanent magnet synchronous motor is improved through flux weakening control of the salient-pole permanent magnet synchronous motor, and meanwhile, the torque of the salient pole permanent magnet synchronous motor is improved by increasing the number of turns of a coil of a single winding; and the invention has the advantages of wide speed regulation range, compact structure, light weight, high position precision, large torqueand the like.

The invention relates to a hybrid stepping motor with a stator embedded with strip-shaped permanent magnets, which comprises a rotor, a rotor iron core and a rotor rotating shaft, and the rotor overlays the rotor iron core, the rotor rotating shaft is arranged in the rotor iron core, and gears are uniformly distributed on the outer circumference of the rotor; the stator comprises a stator iron core, a stator winding, a permanent magnet and a casing, wherein magnetic poles are distributed at the inner periphery of the stator core, small teeth with the same tooth pitch as a gear on the rotor areuniformly distributed on a pole shoe of each magnetic pole, and a pole body of each magnetic pole is provided with a phase stator winding; the permanent magnet grooves are formed in the yoke part ofthe stator core and are used for placing the strip-shaped permanent magnets; and the permanent magnets are arranged at intervals of one magnetic pole and are arranged alternately according to a certain sequence.

The embodiment of the invention discloses a preparation method for a high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet. The method comprises the following steps that the surface of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is coated with a coating material containing heavy rare earth elements, and heavy rare earth element treatment is performed on the coated neodymium iron boron annular magnet; then, aging treatment is performed; gas quenching treatment is performed on the neodymium ironboron annular magnet obtained after aging treatment; then anti-oxidation treatment is performed on the surface, and the high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet is obtained. According to the method, the surface of the neodymium iron boron annular magnet is coated with heavy rare earth elements, permeation treatment is performed, the heavy rare earth elements can permeate the crystal boundary of the neodymium iron boron annular magnet, the intrinsic coercive force of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is improved, the neodymium iron boron annular magnet is not likely to be demagnetized under the high temperature, and the high temperature resistance of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is improved.