124 results about "Magnetic rotation" patented technology

The invention relates to the technical field of copper rod blank detection, in particular to a defect detection method and device for a copper rod blank, and the method comprises the following steps: S10, formulating a quality grade table of the copper rod blank; the copper rod blank is placed on a conveying roller way, and the conveying roller way is started; s20, the speed of a conveying roller way is adjusted, and when the copper rod blank is driven to move to the position in front of a detection area in the conveying direction, an electromagnetic rotation driving device and an electromagnetic induction detection module are started; s30, a second control unit and a second current regulator are used for controlling starting of a second electromagnetic coil, an electromagnetic sensor detects a defect signal, induced voltage is calculated, and defect information of the copper rod blank is collected; s40, calculating an intensity factor X1, a damage degree factor X2 and an influence degree factor X3 according to the defect information; the defect fraction Q of the copper rod blank is calculated according to the formula Q = W1 * X1 + W3 * X2 + W3 * X3; and rating the copper rod blank corresponding to the quality grade table. The method effectively reduces the omission ratio of the defects of the copper rod blank, and accurately recognizes the internal defects.

The invention provides a magnetic suspension dispersing device for blending a polymer drag reducer and a use method. A supporting body II is installed on a base, a supporting body I is installed on the supporting body II, a suspension electromagnet is installed in the base, a rotating shaft is rotatably installed in the supporting body II, a permanent magnet is installed at the bottom of the rotating shaft, and the suspension electromagnet is located below the rotating shaft. The magnetic rotating rotor is installed on the rotating shaft, the magnetic rotating stator is installed in the supporting body II and arranged on the outer side of the magnetic rotating rotor in a surrounding mode, the supporting shaft is connected with the rotating shaft, and the dispersing stator and the electromagnet stator are both installed in the supporting body I. The magnetic dispersing rotor is connected with the supporting shaft. The magnetic dispersion rotor is arranged on the outer side of the dispersion stator in a surrounding mode, the annular permanent magnet is arranged on the outer side of the magnetic dispersion rotor in a sleeving mode, and the electromagnet stator is arranged on the outer side of the annular permanent magnet in a surrounding mode.

An apparatus includes a wall defining a boundary of an evacuated space and having a first side interior to the evacuated space and a second side exterior to the evacuated space, a first plate positioned on a first side of the wall and including a first magnet, a second plate positioned on a second side of the wall and including a second magnet, and a motor mechanically coupled to the second plate and configured to drive rotation of the second plate. The second magnet exerts an attractive force on the first magnet that causes rotation of the first plate in response to the rotation of the second plate.

A Permanent Magnet Synchronous Motor (PMSM) includes a hollow cylindrical stator with stator windings and a magnetic rotor having M pole pairs arranged to rotate around a rotational axis in the stator by a rotor shaft. The stator windings are energized to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor. Two or more analog magnetic flux sensors are positioned within the hollow cylindrical stator and arranged concentrically with respect to the rotational axis around the stator at a constant mechanical angle equal to a constant electrical angle divided by M relative to each other. The magnetic flux sensors are spaced directly from the magnetic rotor by a radial gap (X) in such a way that the magnetic flux of the magnetic rotor impinges on the analog magnetic flux sensors without obstruction to output two or more sinusoidal signals with phases separated by the constant electrical angle that can be evaluated to determine the rotational position of the magnetic rotor. Sensor integration eliminates the additional sense magnet, Hall sensors and CCA positioned external to the motor housing to provide a smaller motor package at lower cost. Integration also facilitates the use of the PMSM in high-temperature or high-shock (high g) environments such as gun-launched guided projectiles or hypersonic missiles.

Field winding rotary machine, with: a stator (24) having a stator core (32) and a stator coil (34) wound around the stator core; a rotor (26) having a rotor core (42) and a rotor field coil (44) wound around the rotor core; a rectifier element (52) connected between both ends of the rotor field coil; and a capacitor (54, 502) having one end connected to one end of the rectifier element and the other end connected to any point of the rotor field coil, wherein the rotor field coil has a first field coil part (44-1) connected in parallel with the capacitor and a second field coil part (44-2) connected between the other end of the rectifier element and the other end of the capacitor.

A centrifugal pump for conveying a fluid, includes a pump housing, a rotor configured to convey the fluid disposed within the housing; and a stator which, together with the rotor, forms an electromagnetic rotary drive configured to rotate the rotor about an axial direction. The stator is a bearing and drive stator with which the rotor capable of being magnetically driven without contact and magnetically levitated without contact with respect to the stator. The rotor is passively magnetically levitated in the axial direction, and actively magnetically levitated in a radial plane perpendicular to the axial direction. The pump housing includes comprising a bottom and a cover, and the rotor is arranged in the pump housing between the bottom and the cover with respect to the axial direction. An indentation is disposed in the bottom or in the cover, the indentation being configured to generate a local turbulence.

The application discloses a kind of superhigh power laser and hollow tungsten electrode composite welding methods based on magnetic rotation control technology.At present, in superhigh power laser medium plate welding, too intense heat energy conversion effect makes welding process extremely unstable, and welding problems such as porosity, spatter, forming difficult to control are prone to occur.The composition of the application includes: hollow tungsten electrode (1), superhigh power laser passes through the center hole of the hollow tungsten electrode to form coaxial composite laser beam (3), annular inductive coil or permanent magnet (2) is arranged above the welding test plate (6), the inductive coil or permanent magnet and the arc (4) at the bottom of the hollow tungsten electrode form a longitudinal magnetic field, the laser beam passes through the arc and the molten pool (5), and the longitudinal magnetic field can rotate the arc, forming a rotating arc and laser beam composite to act on the welding point area.The application is used for superhigh power laser and hollow tungsten electrode composite welding method based on magnetic rotation control technology.

The invention discloses a magnetic signal acquisition device and a magnetic positioning system and method, and relates to the technical field of drilling, and the magnetic signal acquisition device comprises a measurement unit and a logging connection unit; the measuring unit is arranged in the butt joint vertical well and is used for measuring magnetic field intensities generated by magnetic signals at a target spot and a first position of the butt joint vertical well and corresponding included angles; wherein the included angle is the included angle of a space rectangular coordinate system where the measuring unit is located relative to the x axis, the y axis and the z axis of a magnetic north coordinate system when the measuring unit is located at the target point or the first position; the distance between the first position and the target spot is a preset distance; and the well logging connecting unit is connected with the measuring unit and used for adjusting the position of the measuring unit in the butt joint vertical well. According to the method, the magnetic field intensity in the butt joint vertical well can be accurately collected in a complex environment, then the azimuth angle of the magnetic rotating connector is accurately calculated, and the butt joint precision of the drill bit and the butt joint vertical well is improved.

This method, belonging to the field of electromagnetic engineering, aims to improve the speed of impedance matrix filling when solving electromagnetic scattering fields of rotating bodies. Based on a higher-order Taylor series method, it obtains more accurate impedance matrix elements with less sampling data, thus significantly saving computational resources and improving design efficiency. Simulations of various rotating electromagnetic devices demonstrate the superior performance in terms of impedance matrix filling accuracy, speed, and memory consumption, as well as its universality for different models. The method derives the modal Green's function expression after higher-order integration and performs simulations using specific electromagnetic rotating device models. The increased order of the method has practical application value in improving the accuracy of device model simulations. The higher-order numerical integration method also brings efficiency improvements, saving memory consumption and significantly increasing the impedance matrix filling speed compared to the traditional T-shaped integration method.

The invention provides a multi-longitudinal-mode fiber laser weak current detection method based on a magnetic rotation sensitive material, and the method comprises the following steps: building a multi-longitudinal-mode fiber laser weak current detection system; a relationship between the magnetic field intensity and the current in the DC coil; determining the relationship between the intra-cavity loss and the Faraday rotation angle of the multi-longitudinal-mode fiber laser resonant cavity within the magnetic field range which does not reach the magnetic saturation intensity of the magneto-optical material; calculating a current value when the magnetic field reaches the magnetic saturation intensity value of the magneto-optical material; when the to-be-measured current value on the coil is between 0 and the critical current, calculating the to-be-measured current value; the magneto-optical sensor is arranged in the multi-longitudinal-mode fiber laser resonant cavity, and the corresponding relation between light intensity change and weak current is constructed through the matching relation between the magneto-optical sensor and the multi-longitudinal-mode fiber laser resonant cavity, so that small current change which is difficult to measure by a traditional sensor can be detected, and high-sensitivity measurement is realized.

The utility model relates to the technical field of building blocks teaching aid, especially to a circuit module and circuit toy set, including base, the side of base is provided with the interface for inserting the power cord, the bottom of base is provided with the standardization intermate structure for inserting on building block board, and the standardization intermate structure is connecting post or connecting groove, the inside rotation of base is provided with magnetic attraction component and the driving device of driving magnetic attraction component rotation, at least partly transparent liquid storage cylinder body, detachably installed on the base, the bottom of liquid storage cylinder body is equipped with magnetic rotation component, wherein, when liquid storage cylinder body installs to base, magnetic rotation component is located in the magnetic field action range of magnetic attraction component, when driving device drives magnetic attraction component rotation, through magnetic field coupling drives magnetic rotation component synchronous rotation, makes the liquid in liquid storage cylinder body form whirlpool, this scheme has the advantages of non -contact transmission to avoid mechanical wear and tear, high modular degree and convenient maintenance.

The application discloses a hand exoskeleton for capturing finger movement and a finger configuration reconstruction method, and can realize full-space precise movement capturing of human fingers and reconstruction of finger configurations. The hand exoskeleton is composed of a plurality of serial kinematic chains and a common base, each serial kinematic chain comprises one active joint and five passive joints, and a magnetic rotation angle sensor is arranged on the joint to realize movement capturing of the end of the serial kinematic chain. The serial kinematic chain forms a parallel structure with a human finger to realize six-degree-of-freedom precise movement capturing of the end of the human finger. Captured human finger tip movement is reconstructed through a circular arc fitting algorithm, and the finger movement configuration can be displayed in real time in a three-dimensional visual simulation environment. According to different requirements, the number of serial kinematic chains on the base can be increased or reduced, and hand movement can be reproduced in real time in a three-dimensional simulation environment, and experience is improved.

To provide an electromagnetic rotary magnetic flux machine which enables a higher power density.SOLUTION: A magnetic flux machine 10 includes: a plurality of coil assemblies; and a plurality of magnet sets that are in mutual close proximity and circularly about a center shaft 5. Any one of each coil assembly and each magnet set is supported by at least one shaft to be positioned with the center shaft. Any one of each coil assembly and each magnet set performs a rotational motion about the center shaft in the case where a current exists in each coil assembly. A magnetic flux of each magnet set is conducted in a shaft direction and a semi-radial direction, and a rotation of a machine is orthogonal to a magnetic flux direction. A plurality of magnets in each magnet set is supported by one or another of a plurality of coaxially aligned shafts so that the magnetic flux machine can operate as an electric motor, a power generator, or both at the same time.SELECTED DRAWING: Figure 1

To provide a magnetic levitation device with low eddy current losses.SOLUTION: A rotor 3 has a disk-shaped or ring-shaped magnetically effective core 31. A magnetic levitation device comprises a stator 2 with a cup-shaped recess such that the rotor can be inserted into the recess. The stator has a plurality of coil cores 25, each having a longitudinal leg 26 and a magnetic pole piece 27. Each longitudinal leg extends from a first end 261 in an axial direction A to a second end 262. A contact surface 271 is arranged at the second end. Each magnetic pole piece extends from the contact surface at least partially in a radial direction R to an end face 272. The radial direction R is perpendicular to the axial direction A. The end face is arranged around the cup-shaped recess. At least one concentrated winding 61 is arranged at each longitudinal leg. The longitudinal leg is made of a first material, and the magnetic pole piece is made of a second material, the first and second materials being different.SELECTED DRAWING: Figure 1

To provide a pumping device for conveying a fluid, the pumping device including a single-use device and a reusable device, and a method for operating the same.SOLUTION: A single-use device 2 is to be inserted into a reusable device 3 and includes two pump units 21, 22 in series, one behind the other. Each pump unit includes a rotor designed as a rotor for a bearingless motor, and can be magnetically levitated and driven without contact. The reusable device 3 includes a stator 31, 32 for each rotor which forms an electromagnetic rotary drive for rotating the rotor. Each stator is a bearing and drive stator with which the rotor can be magnetically driven without contact and magnetically levitated without contact with respect to the stator. An independent control device is provided for each stator, and can independently activate the stator.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of lubricating oil stirring, in particular to a magnetic stirrer with an adjustable magnetic turning radius. The magnetic stirrer capable of adjusting the magnetic turning radius comprises a magnetic stirrer and a magnetic stirrer, wherein an adjusting assembly for adjusting the magnetic stirrer is mounted on the magnetic stirrer; the adjusting assembly comprises a mounting seat, a vertical rod is fixedly mounted on the mounting seat, a hanging column is arranged on the vertical rod, and the hanging column is connected with the magnetic stirrer through a hanging wire. Compared with mechanical blending of lubricating oil, the magnetic stirrer capable of adjusting the magnetic turning radius has the advantages that the magnetic stirrer is small in size, cannot be contaminated by excessive lubricating oil to cause high experimental oil consumption and is easy to clean, the magnetic stirrer is easy to take out from a beaker, and the suspension wire is small in size and cannot carry the lubricating oil basically, so that the magnetic stirrer is convenient to use. And meanwhile, the problems that lubricating oil is consumed and the lubricating oil is polluted by carried dust because the lubricating oil is invaded into tweezers or clips when the magnetic stirrer is taken out are solved.

The present invention discloses a method for controlling the interface of solid-liquid bimetallic casting containing aluminum alloy, and belongs to the process field of casting alloy. The present invention aims to solve the problem that cracks are generated along the interface direction in the existing solid-liquid bimetallic casting containing aluminum alloy. The steps of the method of the present invention are as follows: step one, control of the interface roughness of the solid metal preform; step two, integrated modeling; step three, configuration of alternating electromagnetic field and permanent magnetic rotating magnetic field, step four, integrated casting. By applying an alternating electromagnetic field and a permanent magnetic rotating magnetic field in coordination with the casting process to form an involute vortex structure at the interface of the two materials to adjust the local distribution state of the aluminum alloy molten metal in the filling process, the generation of cracks along the interface direction can be effectively avoided, and the crack incidence along the interface direction is reduced by more than 80%, and the probability of generating cracks in the direction perpendicular to the interface is not increased.

The utility model discloses a shell assembly of a magnetic rotary encoder, which relates to the technical field of magnetic rotary encoders and comprises a sensor shell, a positioning ring is arranged at the axis of the top of the sensor shell, a fixing seat is movably mounted at the positioning ring, and a magnet is mounted at the axis of one end, close to the sensor shell, of the fixing seat in a matched manner. According to the design scheme of the utility model, through the design that the positioning ring is arranged at the axis of the top of the sensor shell, the positioning ring is inserted into the bottom of the fixed seat, and the fixed seat is radially limited through the positioning ring, so that the coaxiality between the sensor shell and the fixed seat is less than 0.3 mm, the coaxiality of the magnetic encoder sensor and the magnet is prevented from being out of tolerance, and the reliability of the magnetic encoder is improved. In addition, dust in the external environment is prevented from entering a gap between the magnetic encoder sensor and the magnet through the fixing seat, and the magnetic rotary encoder is favorable for improving the detection precision.

A magnetic suction rotary unlocking buckle comprises an upper buckle assembly and a lower buckle assembly matched with the upper buckle assembly, the lower buckle assembly comprises a connecting plate and a protrusion arranged on the connecting plate, a first magnet is arranged in the protrusion, and an annular clamping groove is formed in the outer wall of the protrusion; the upper buckle assembly comprises a lower cover, an upper cover and a hand wheel ring pivoted between the upper cover and the lower cover, a through hole communicated with the containing cavity is formed in the lower cover, a mounting base is arranged above the through hole in the containing cavity and connected with the inner wall of the hand wheel ring, a second magnet and a third magnet are arranged on the mounting base, the second magnet is matched with the first magnet in an attraction mode, and the third magnet is matched with the second magnet in an attraction mode. The third magnet is matched with the first magnet in a repelling mode, a clamping hook is arranged on one side of the through hole in the containing cavity, and a first reset mechanism for driving the hand wheel ring to reset after rotating and a second reset mechanism for driving the clamping hook to be close to the through hole are arranged in the containing cavity. The locking device is simple and quick to operate, and can realize quick buckling and unlocking.

The invention discloses a method for reducing storage and calculation amount in electromagnetic scattering non-singularity solution of a rotating body, and belongs to the field of electromagnetic engineering. According to the method, on the basis of a moment method (MoM) theoretical framework, an auxiliary function is introduced to eliminate the influence of Green function singularity in a surface integral equation on numerical calculation, and meanwhile, the physical constraint that the electric field divergence of a passive area is zero is further combined, so that effective order reduction of an unknown quantity is achieved; a traditional four-variable integral equation set is simplified into a three-variable coupled wave equation, the order and storage requirements of an impedance matrix are remarkably reduced, and the solving efficiency is greatly improved while the calculation precision is guaranteed. A specific electromagnetic rotating body device model is used for simulation, numerical verification shows that the method has excellent performance in calculation of an electromagnetic scattering field of a typical rotating body structure, and an efficient and reliable technical means is provided for rapid electromagnetic calculation of engineering equipment such as spherical communication satellites and missile nose cones.

The utility model relates to the technical field of chemical test analysis, and discloses a magnetic rotation full-automatic fiber dissolver which comprises a bottom plate, a first fixing table is fixedly connected to the left side of the top end of the bottom plate, a second fixing table is fixedly connected to the right side of the top end of the bottom plate, and a motor is fixedly connected to the top end of the first fixing table. The driving end of the motor penetrates through the top end of the first fixing table and is fixedly connected with a driving wheel, the right end of the driving wheel is connected with a driving wheel through a rotating assembly, the bottom end of the hyaluronic acid barrel is arranged at the top end of the driving wheel, and the bottom end of the inner wall of the hyaluronic acid barrel is rotationally connected with a driven wheel. According to the utility model, a magnetic transmission mode is adopted, a dissolving solution and fibers are rotationally stirred, vibration and noise generated during mechanical contact are avoided, the dissolving solution is added into the hyaluronic acid barrel through the peracid pipelines, an experimenter is prevented from being in contact with acidic and alkaline dissolving solutions, and the experiment efficiency is improved. The safety of experimenters is ensured.

A pumping device for conveying a fluid is proposed, having a disposable device and a reusable device, wherein the disposable device is designed to be inserted into the reusable device and comprises two pump units arranged in series, wherein each pump unit comprises a rotor for conveying the fluid, wherein each rotor is designed as a rotor of a bearingless electric motor and can be contactlessly magnetically suspended and contactlessly driven for rotation about an axial direction, wherein the reusable device is designed for insertion of the disposable device and comprises for each rotor a stator which forms with the rotor an electromagnetic rotary drive for rotating the rotor about the axial direction, wherein each stator is designed as a bearing and drive stator through which the rotor can be contactlessly magnetically driven and can be contactlessly magnetically suspended relative to the stator, and wherein for each stator an independent control device is provided.

The invention discloses a magnetic field measurement method based on a magnetic rotation effect and image analysis. The method comprises the following steps: constructing a wedge device, and setting a magnetic field measurement device based on a magnetic rotation effect and image analysis by using the wedge device based on a magnetic field measurement method of a polarizer and an analyzer; the wedge device comprises a glass sheet and a magnetic rotation crystal which are equal in thickness; the glass sheet is connected with one end of the magnetic optical rotation crystal in parallel, and the other end of the glass sheet and the other end of the magnetic optical rotation crystal are provided with interval filaments, so that a wedge-shaped air film with an inclination angle is formed between the glass sheet and the magnetic optical rotation crystal; acquiring an image gray value of the wedge interference fringes by using a magnetic field measurement device based on a magnetic rotation effect and image analysis; and based on the image gray value of the wedge interference fringes, the magnetic field intensity is calculated by using a magnetic rotation effect principle. According to the invention, the fine change of the magnetic field in a small range can be accurately measured, the components are easy to combine and the light path is easy to build in the measurement process, and the measurement time is shortened.

1. The name of this design product: Recorder (D128 Magnetic Rotation). 2. Purpose of this design product: For a magnetic driving recorder with a 360-degree rotating display screen. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

A bearingless motor (1), which is an electromagnetic rotating machine, has a rotor (20) and a stator (10) disposed with a gap (2) therebetween, and generates a supporting force for suspending the rotor (20) in a non-contact manner by means of an electromagnetic force or a magnetic force. The stator core (11) has a rear yoke portion (12) and a plurality of tooth portions (13). The tooth part (13) is provided with a tooth main body part (13a) and a flange-shaped tooth front end part (13b). The rotor (20) has a rotor core (21) and a plurality of permanent magnets (22). The tooth tip section (13b) has an upper-stage tooth tip section (13b1) and a lower-stage tooth tip section (13b2). The transmissivity, which is an amount indicating the ease of passage of a magnetic flux in at least one of the gap portion (2) and the core in a magnetic path that causes the stator (10) and the rotor (20) to rotate in the radial direction and the circumferential direction, decreases in one direction from one end side toward the other end side in the axial direction.

Improved magnetic rotor assemblies are provided. In one embodiment, a magnetic rotor assembly includes two or more rotor disks. The rotor disks may each contain corresponding sets of permanent magnets, which may be circumferentially disposed around the disks. The disks may then positioned near one another such that the disks are magnetically coupled. In certain instances, the N-poles of the permanent magnets may face one another. In other instances, the S-poles of the permanent magnets may face one another.

The invention belongs to the technical field of experiment teaching instruments. The operation device comprises a controller, a constant current source, a machine shell, a rotating shaft, a cylindrical shell, a photoelectric sensor, a light shielding rod and a metal rod clamp with a movable block. The controller is in communication connection with the constant-current source and the photoelectric sensor, the upper bearing and the lower bearing of the machine shell are connected with the rotating shaft, the constant-current source is connected with the two ends of the rotating shaft through the electric brush, the cylindrical shell (conductor) is powered on and can rotate, and the light shielding rod is fixed to the outer side of the cylindrical shell and used for detection of the photoelectric sensor. The problem that existing experiment teaching lacks a device for visually demonstrating the electromagnetic effect and torque adjustment and is not beneficial for students to understand related principles is solved, the electromagnetic rotation effect and the adjustable torque can be visually demonstrated, and experiment teaching can be effectively assisted.

According to an embodiment, an interior magnet rotor (10) includes a rotor shaft extending in a rotation axis direction, a rotor core (12), and a plurality of permanent magnets (20). The rotor core (12) has at least one magnet housing hole (12a) formed in each magnetic pole and sandwiched by a first wall (12d) and a second wall (12e), and is attached to the rotor shaft. The plurality of permanent magnets (20) are housed in the magnet housing hole (12a) and are arranged in a row in one direction in a cross section of the magnet housing hole (12a). The permanent magnets (20) each have a substantially rectangular parallelepiped outer shape and have slopes formed over a longitudinal direction on two corners opposite to each other.

A fan having a rotor for generating a fluid flow includes a stator and a rotor, which form an electromagnetic rotary drive for rotating the rotor about an axial direction. The rotary drive is an external rotor, and the rotor includes a magnetically effective core configured in an annular manner. The impeller includes a hub on which a plurality of blades configured to generate the fluid flow is arranged, and the stator is a bearing and drive stator configured to magnetically drive the rotor without contact and magnetically levitate the rotor without contact with respect to the stator. The rotor is capable of being actively magnetically levitated in a radial plane perpendicular to the axial direction, the hub of the impeller completely enclosing the magnetically effective core of the rotor, and the stator is encapsulated in a stator housing and formed of a low-permeable material.

In a rotor (4) in which one pole is constituted by two magnet insertion holes provided in a V-shape, the strength of an inner-diameter bridge can be ensured even if the inner-diameter bridge is reduced in width.　A magnet insertion hole (45) comprises an inner-diameter flux barrier (45a) on the inner-diameter side and an outer-diameter flux barrier (45b) on the outer-diameter side of the position where a permanent magnet (43) is disposed. A lightening hole (46) is made in the rotor at a position overlapping a d-axis between inner-diameter flux barriers. The portion between an inner-diameter flux barrier and the lightening hole is an inner-diameter bridge (42a), and a straight line L1 perpendicular to the cross section of a minimum width part W1 of said inner-diameter bridge intersects the d-axis on the outer-diameter side or the inner-diameter side of said inner-diameter bridge.