389 results about "Rotating magnetic field" patented technology

The invention discloses a support installation angle measuring device for photovoltaic power generation, which relates to the technical field of measurement and comprises an installation position structure, a magnetic field control assembly and a measuring assembly. The installation position structure is arranged at the connection position of a stand column and a cross beam of the photovoltaic support, the connection point of an inclined supporting rod and a main frame and the connection area of a base and a foundation, under the cooperation of the magnetorheological fluid cavity assembly and the magnetic field control assembly and the design of a spiral flow guide groove and a cone frustum cavity, the fluid distribution uniformity is improved, and under the action of a magnetic field, the fluid distribution uniformity is improved. The spiral flow guide grooves guide the magnetorheological fluid to form spiral flow and cooperate with a rotating magnetic field, the support fixing effect is remarkably enhanced, and when the support deviates due to external force, the micro stress sensor of the magnetorheological fluid cavity reversely deduces the angle through shear stress changes and feeds the angle back to the magnetic field control assembly for real-time correction. Therefore, stress is released and deformation is corrected under extreme working conditions such as strong wind and earthquakes, and the accuracy and response speed of angle control and measurement of the support are greatly improved.

The invention provides a round billet continuous casting machine and multi-stage multi-mode electromagnetic stirring device matching method, and belongs to the technical field of metallurgy continuous casting, and the method comprises the steps that an electromagnetic stirrer in a crystallizer area applies a rotating magnetic field in the initial solidification stage, and the forming quality of an initial solidification shell is optimized; an electromagnetic stirrer in the secondary cooling area utilizes a traveling wave magnetic field to continuously regulate and control the solidification process of the core part of the casting blank; the feeding effect of a final solidification section is remarkably improved through the action of a high-intensity magnetic field by an electromagnetic stirrer in a solidification tail end area, and multiple matching modes are produced to be matched with existing continuous casting processes of different steel grades according to the characteristics of the steel grades, the throwing direction of each area and the type of the electromagnetic stirrer. And then through linkage of the multi-stage multi-mode electromagnetic stirring device and cooperative control over continuous casting process parameters, the equiaxed crystal area of the casting blank is enlarged, segregation is reduced, the internal quality of the casting blank is improved, and the density, uniformity and mechanical performance of the casting blank are improved.

The utility model relates to the related technical field of motors of electric motorcycles, in particular to a motor of an electric vehicle, which comprises a motor shaft, first magnetic steel is fixedly connected to the inner side surface of an iron ring, and second magnetic steel is fixedly connected to the inner side surface of the iron ring. According to the electric vehicle motor, through the arrangement of the first magnetic steel and the second magnetic steel, when current enters the winding of the stator 11, the winding of the stator 11 can generate a rotating magnetic field according to the law of electromagnetic induction, and under the interaction of the magnetic field, generated electromagnetic force can drive the motor shaft 1 to rotate, so that electric energy is more effectively converted into mechanical energy; the double-row magnetic steel mode improves the strength of single magnetic steel, the double-magnetic-circuit mode is adopted, the two pieces of short magnetic steel are easy to machine, the manufacturing cost is low, the product cost is reduced, and the cost performance is improved.

A robot includes a hand motor configured to independently rotate a first hand and a second hand around a hand axis along a vertical orientation. The hand motor includes: a first output shaft fixed to the first hand; a first stator configured to apply a rotating magnetic field on the first output shaft in the arm link; a second output shaft extending through the first output shaft and fixed to the second hand; a second stator configured to apply a rotating magnetic field on the second output shaft in the arm link; a first bearing held by the arm link and holding the first output shaft or the second output shaft; and a second bearing held by the second output shaft between an outer periphery of the second output shaft and an inner periphery of the first output shaft.

The invention discloses a water-rich broken surrounding rock directional grouting method based on an external magnetic field. The method comprises the following steps that 1, geological exploration is conducted on a target water-rich broken surrounding rock area; step 2, mixing the base material, the nano ferroferric oxide magnetic particles, the rheology regulating agent, the dispersing agent and the coagulation accelerator according to a mass ratio; 3, injecting alternating current with the frequency of 50-500Hz into the electromagnetic coil to generate a rotating magnetic field with the intensity of 3-10kA / m, and driving the slurry to directionally migrate along the main fracture area; 4, the grouting pressure of the pre-buried pressure sensor is monitored in real time, when the pressure change rate delta P / delta t is larger than or equal to 0.1 MPa / min, the electromagnetic coil injection frequency is switched to alternating current of 1 kHz to 10 kHz, so that the intensity of a magnetic field is improved to 8 kA / m to 15 kA / m, and grouting on the micro-crack area is enhanced; and 5, when the pressure change rate delta P / delta t is smaller than + / -0.1 MPa / min and lasts for 5-10 min, grouting operation is ended. The method aims at solving the problems that in grouting reinforcement of the water-rich fractured stratum, slurry is lost along with water flow, micro-cracks are difficult to fill, and reinforcement bodies are distributed unevenly.

The invention provides a flywheel energy storage system with an electromagnetic coupler, which comprises a motor, a flywheel rotor, the electromagnetic coupler, a frequency converter and a generator, and is characterized in that the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate, the electromagnetic coupler comprises an outer rotor and an inner rotor, and the outer rotor sleeves the inner rotor and is spaced from the inner rotor; the flywheel rotor is in transmission connection with the inner rotor, the inner rotor generates a rotating magnetic field to drive the outer rotor to rotate, and the frequency converter is connected with the outer rotor to change the current frequency of the outer rotor so as to change the magnetic field rotating speed matched with the current, so that the mechanical rotating speed of the outer rotor is kept constant. The generator generates power, accesses the power grid and inputs electric energy with stable frequency into the power grid, the requirement of power transmission to the power grid is met, power electronic devices are not needed, rotational inertia in the power grid can be improved, necessary voltage and frequency support is provided for the power grid, and the capacity of the power grid for efficiently accepting new energy is improved.

The invention provides an angular displacement measurement method and system based on diamond quantum sensing, and relates to the field of quantum sensing, and the method comprises the steps: taking a diamond NV color center as a probe, placing the probe in a magnetic field and a static magnetic field which rotate at a constant speed, and carrying out the coaxial rotation with a to-be-measured object, the diamond NV color center of the system is measured by adopting continuous light excitation and microwave radiation based on diamond quantum sensing angular displacement; acquiring a first fluorescence signal emitted by the diamond NV color center at a first moment, and outputting a corresponding first traveling wave signal; acquiring a second fluorescence signal emitted by the diamond NV color center at a second moment, and outputting a corresponding second traveling wave signal; and based on the phase difference between the first traveling wave signal and the second traveling wave signal, determining the angular displacement value of the rotation of the object to be measured of the angular displacement measurement system based on diamond quantum sensing. According to the embodiment of the invention, the diamond NV color center is highly sensitive to the change of the magnetic field, and the measurement precision of angular displacement can be improved.

The application discloses an automatic magnetic force polishing and separating equipment, which comprises a rack, a magnetic force polishing machine and a magnetic force separating machine; the magnetic force polishing machine comprises a polishing barrel and a first rotating magnetic field device, the first rotating magnetic field device is arranged on the rack, and the polishing barrel is arranged on the top of the first rotating magnetic field device; the magnetic force separating machine comprises a separating barrel and a second rotating magnetic field device, the second rotating magnetic field device is arranged on the rack, and the separating barrel is arranged on the top of the second rotating magnetic field device; the separating barrel is provided with a separating chamber and a recycling chamber arranged below the separating chamber, the separating barrel is provided with filter holes allowing the magnetic abrasive in the separating chamber to enter the recycling chamber, and the rack is provided with a turnover device for overturning the polishing barrel, so that the workpiece and the magnetic abrasive in the polishing barrel can be poured into the separating chamber. The magnetic force polishing and the magnetic force separating are integrated, the whole process automation of the magnetic force polishing and the separation of the magnetic abrasive and the workpiece after polishing is realized, and the production efficiency and the stability of the polishing quality are ensured.

The multi-mode electromagnetic stirring device comprises a traveling wave magnetic field generator set, a rotating magnetic field generator and a shell assembly, and the traveling wave magnetic field generator set and the rotating magnetic field generator are arranged in the shell assembly in the axial direction. A multi-mode electromagnetic stirring device is arranged outside liquid metal needing to be stirred, alternating current in a certain form is supplied to a traveling wave magnetic field generator set in the multi-mode electromagnetic stirring device through an external power source, a traveling wave magnetic field can be formed in the multi-mode electromagnetic stirring device, and therefore axial force is generated on the liquid metal; alternating current in a certain form is supplied to a rotating magnetic field generator in the multi-mode electromagnetic stirring device, and a rotating magnetic field can be formed in the multi-mode electromagnetic stirring device, so that rotating force is generated on liquid metal; the traveling wave magnetic field generator group and the rotating magnetic field generator are respectively supplied with alternating current in a certain form through an external power supply, and a traveling wave magnetic field and a rotating magnetic field can be simultaneously generated in the multi-mode electromagnetic stirring device, so that spiral stirring force is generated on liquid metal.

The application discloses a stopper rod for inhibiting confluence vortex and a method thereof, and belongs to the technical field of water gap flow control of continuous casting tundish in metallurgy technology. The stopper rod comprises a stopper rod shell, a stopper rod core is embedded in the stopper rod shell, a magnetic field generating device is arranged on the outer circumferential wall of the stopper rod core, and the magnetic field generating device is used for exciting a magnetic field directly above the water gap. The magnetic field generating device is an electromagnetic coil or a rotating magnetic field stirrer. The application can effectively inhibit the generation of confluence vortex at the end of pouring by adding an electromagnetic field to make the molten steel generate induced current. Meanwhile, the magnetic field excited by the application is formed directly above the water gap and has the maximum strength at the vortex forming position, so that the inhibition effect of the magnetic field on the confluence vortex is more direct, the inhibition effect is obvious, and energy waste is avoided.

The utility model discloses an axle gear magnetic powder inspection device which comprises a lathe bed, a movable support module is arranged on one side of the top end of the lathe bed, a fixed support module is arranged on the other side of the top end of the lathe bed, a guide rail is fixedly installed on the surface of the top end of the lathe bed, and an opening and closing coil module is arranged on the surface of the top end of the guide rail. A rotating magnetic field magnetizing shell is arranged on one side of the opening and closing coil module, a rotating magnetic field magnetizing module is arranged in the rotating magnetic field magnetizing shell, and the axle is movably installed on the surface of the top end of the lathe bed. Through the cooperation of the opening and closing coil module and the rotating magnetic field magnetization shell, when the device is used, the position of the opening and closing coil module can be adjusted by moving the movable base on the surface of the guide rail, so that magnetic powder inspection operation can be performed on each position on the surface of an axle, and the device can be conveniently used for axles with different lengths.

The utility model relates to the technical field of water treatment devices, in particular to an electromagnetic separation water treatment device which comprises a treatment box, sliding openings are symmetrically formed in the top of the treatment box, cleaning sleeves are fixedly connected to the interiors of the sliding openings, sleeves are movably inserted into the cleaning sleeves, iron cores are fixedly arranged in the sleeves, and the iron cores are fixedly connected with the sliding openings. The outer portion of the iron core is fixedly sleeved with a coil, and a servo motor is fixedly arranged on the inner wall of the treatment box through a supporting rod. The stirring rod is driven by the servo motor to rotate, a rotating magnetic field can be generated to induce sewage to form eddy current, the adsorption probability that pollutants collide with an iron core and a coil is increased, the treatment time is shortened, and the stirring rod can drive the cleaning rod to rotate while rotating, so that substances attached to the inner walls and the bottoms of the treatment box and the bottom cover are effectively scraped; and the treatment box can be separated from the bottom cover in the later period, so that the maintenance is convenient.

The invention provides a coil array and a wireless power transmission system, the coil array comprises at least one coil structure, the coil structure comprises three coil units, and the three coil units respectively form three sides of the same triangle so as to form the coil structure; wherein each coil unit in the same coil structure is configured to allow the current flowing through the coil unit to form a current loop, and the coil units in the same coil structure are the same or different; moreover, each coil unit in the same coil structure is configured to be excited by an independent amplitude-modulated wave and obtain a driving current, so that the coil array is allowed to be configured to obtain optimal magnetic field distribution and magnetic field polarization according to different phases and current directions and form a three-dimensional rotating magnetic field.

The invention belongs to the technical field of organic chemical synthesis, and particularly relates to a novel method for synthesizing trifluoromethyl heteroaromatic hydrocarbon. The invention provides a novel method for synthesizing a trifluoromethyl heteroaromatic compound, the reaction system is mild, the substrate application range is wide, and the functional group compatibility is good. Specifically, in a rotating magnetic field, a metal conductor cuts magnetic induction lines to generate electron transfer, so that trifluoromethyl sulfosalt is reduced to generate trifluoromethyl free radicals, and the trifluoromethyl free radicals react with heteroaromatic hydrocarbon to synthesize trifluoromethyl heteroaromatic hydrocarbon. The method for synthesizing the trifluoromethyl heteroaromatic hydrocarbon comprises the following steps that firstly, heteroaromatic hydrocarbon, trifluoromethyl sulfosalt, a solvent and a metal rod are placed in a reaction tube and react in a multi-energy field coupling device, the magnetic field intensity (B) is set to be 0.01-3.00 T, the rotation frequency is set to be 5-50 Hz, the reaction time is set to be 1-24 h, finally, the trifluoromethyl heteroaromatic hydrocarbon is prepared, and the general formula of the trifluoromethyl heteroaromatic hydrocarbon is shown in the specification.

The invention discloses a forging forming process for an aluminum casting chassis supporting arm implanted with a steel plate framework, and relates to the technical field of metal composite material forming. The method comprises the following steps: 1, pretreating a steel plate framework; 2, assembling the mold; 3, performing semi-solid extrusion; 4, sequentially carrying out segmented heat treatment of solid solution at 535 DEG C for 2 hours, water quenching and aging at 175 DEG C for 8 hours; and 5, the cooling rate is controlled to be 5 DEG C / min under a 0.15 T rotating magnetic field, and solidification is completed. Through a quadruple synergistic mechanism of micro anchoring structure-gradient coating-semi-solid extrusion-segmented heat treatment, the shear strength of a composite interface reaches 60-105 MPa, the tensile strength of a final component reaches 311-322 MPa, the fatigue life is prolonged to 120 million times from 500 million times, the lightweight target that the weight is reduced by 50% compared with that of a pure steel part is achieved, and the production cost is reduced. The defects of insufficient strength, infirm aluminum / steel interface bonding, pore shrinkage and brittle phase of a traditional aluminum casting piece are overcome.

An actuator (10) includes a stator (12) that is formed in a ring shape and generates a rotating magnetic field. Furthermore, the actuator (10) is provided with a shaft (36) which is formed using a soft magnetic material, is disposed radially inward of the stator (12), is provided with a magnet (38), and is rotated by a rotating magnetic field generated by the stator (12). Furthermore, the actuator (10) is provided with a direct-acting part (18) which is provided at the center of rotation of the shaft (36) and which is displaced in the axial direction by the rotation of the shaft (36).

The invention discloses a demonstration device for a magnetic sensing chip application scene, and the device comprises a touch screen which is configured to display an operation interface and a test result. The chip testing module comprises a rotating speed simulation unit, the rotating speed simulation unit comprises a first sample table and a rotating magnetic field mechanism capable of generating a periodically changing magnetic field, a first testing seat is integrated on the bearing surface of the first sample table, and the first testing seat is provided with a pin interface matched with a magnetic rotating speed sensing chip to be tested. A voltage division method test or a bridge method test is supported; the real working environment of the magnetic rotating speed sensing chip can be reproduced, and the problem that traditional testing equipment is insufficient in scene pertinence is solved.

The invention discloses a magnetic control soft robot and a preparation method, a control system and a control method thereof, and belongs to the technical field of biomedical engineering and soft robots. The magnetic control soft robot comprises a main body framework, a head magnetic sheet, a tail magnetic sheet, a magnetic box, a hollow needle plate and a magnetic foot pad. The magnetic control soft-bodied robot provided by the invention can be orally taken to enter the gastrointestinal tract in the body, an external rotating magnetic field is applied for control, the whole process of'movement-positioning-piercing-drug release 'is completed, in-vivo subcutaneous drug delivery is carried out, the drug utilization efficiency can be improved, and the robot is high in dynamic environment adaptability and can be recycled.

This invention belongs to the field of vertical shaft blasting excavation construction control technology, and particularly relates to a vertical shaft excavation method that coordinates boundary pipe curtain pre-support with internal weak blasting. The method first delineates the vertical shaft boundary and defines the excavation area. A guide hole is excavated at the center of the area and enlarged to construct a central initial shaft. A rotating magnetic field probe that can move up and down along the axis is installed inside the shaft. During the drilling of the guide hole, the deviation is controlled by an electromagnetic drilling-while-drilling measurement system. Then, grouting holes are excavated along the vertical shaft boundary, and unstable strata sections are simultaneously sampled, identified, and reinforced. At the same time, a retaining structure is constructed to form an edge support system. Subsequently, starting from the central initial shaft, multiple annular blasting areas are divided and marked from the inside out. Blasting holes are laid in each area, and blasting is carried out sequentially from the inside out, satisfying the free face compensation space criterion. Finally, locally unstable areas on the inner wall of the vertical shaft are reinforced in real time, and a permanent lining structure is constructed. This method achieves multi-process coordination, improving the safety and forming quality of vertical shaft excavation.

The utility model discloses a fishing reel brake stepless adjusting device based on a rotating magnetic field, and relates to the technical field of fishing reels. The device comprises a wire wheel seat, a cover plate, an electric control plate and a magnetic induction element, the electric control plate and the magnetic induction element are arranged in a cavity of the cover plate, a magnet bearing shaft is adopted, a bearing end is arranged at the lower end of the shaft, and a magnet with the magnetization direction perpendicular to the axis is fixed in a bottom cavity; the cover plate is provided with an axial limiting mechanism, the axial limiting mechanism is preferably a plurality of limiting pieces which are integrally formed with the cover plate and provided with clamping blocks, and the limiting pieces are clamped with the bearing end to limit axial displacement and allow free rotation. A user operates the knob and other operating pieces to drive the magnet bearing shaft and the magnet to rotate, the magnetic induction element outputs signals through continuous changes of the non-contact induction magnetic field direction, and the electric control board adjusts braking force in a stepless mode according to the signals. The stepless brake control device eliminates the problem of potentiometer abrasion, is simple and compact in structure, and achieves stepless brake control which is long in service life, high in reliability and accurate in adjustment.

The invention discloses an external gyromagnetic drive centrifugal micro-fluidic chip and device suitable for distributed deployment. The centrifugal micro-fluidic chip comprises a chip body (3) and a magnetic driving structure arranged on the chip body, wherein the magnetic driving structure is arranged around the rotation center of the centrifugal micro-fluidic chip. The centrifugal micro-fluidic chip device comprises the centrifugal micro-fluidic chip and a driving device module, wherein the driving device module comprises a stator disc (1), a rotating magnetic field driving control circuit (6) and a driving part shell (5); a plurality of coils (11) are arranged on the stator disc, the rotating magnetic field driving control circuit can control all the coils to generate a rotating magnetic field, and the centrifugal micro-fluidic chip can rotate under the action of the rotating magnetic field. The centrifugal micro-fluidic chip and the centrifugal micro-fluidic device are realized by adopting a simple structure and do not need to occupy a lot of placement space.

The application discloses a kind of full-automatic magnetic particle detection device and defect identification method for defect identification, it is related to nondestructive testing technical field.The present application comprises: mobile platform, the bottom of the mobile platform is equipped with multiple groups of driving assembly, for moving on the surface of the workpiece to be measured;Multiple magnetization components, the magnetization component is arranged at the bottom of mobile platform, for generating rotating magnetic field to the workpiece to be measured magnetization;Magnetic suspension liquid spraying assembly, the magnetic suspension liquid spraying assembly is installed in the bottom of the mobile platform, and magnetic suspension liquid spraying assembly is located between adjacent magnetization component, for spraying magnetic suspension liquid to the surface of the workpiece to be measured.The present application realizes the physical isolation of detection personnel and dangerous scene, eliminates the subjective error of artificial detection, and is suitable for high altitude, closed, toxic, radiation and other complex working conditions of ferromagnetic material surface and near-surface defect detection.

This application relates to a blood pump and its driving device. The driving device includes a drive housing, a rotor, a stator assembly, and a bushing assembly. The drive housing has a communication port and a limiting portion. The rotor is rotatably mounted on the drive housing, with a portion of the rotor housed within the drive housing and a portion extending outside the drive housing and fixedly connected to an impeller. The stator assembly is housed within the drive housing and is capable of generating a rotating magnetic field to drive the rotor to rotate. The bushing assembly includes a first bushing and a second bushing mounted on the drive housing. The first and second bushings are arranged along the rotation axis of the rotor. One of the first and second bushings abuts against the limiting portion. The second bushing includes a ring body and an extension extending from the ring body. The extension abuts against the first bushing to space the ring body from the first bushing. The rotor rotatably passes through the first bushing and the ring body, and the communication port allows the first and second bushings to pass through. The above-mentioned driving device is easy to install and has high assembly precision.

A method for preparing a foamed sclerosant composition. One method includes introducing a liquid sclerosant composition into a foaming space of an interior of a container, the foaming space containing a mixing component having a magnetic part. Rotation of the mixing component is achieved by generating for a first holding time a rotating magnetic field at a first speed and after the first holding time generating for a second holding time the rotating magnetic field at a second speed greater than the first speed.

The application relates to the field of medical devices, and particularly discloses a drug releasing capsule device based on an external rotating magnetic field, which comprises a capsule shell, a medicine liquid is stored in the capsule shell, a drug releasing hole is arranged in the lateral wall of the capsule shell, and a spiral strip is arranged on the outer lateral wall of the capsule shell; a medicine pushing rod is slidably arranged in the capsule shell, a stop block is fixedly connected to the medicine pushing rod, the stop block slides along the inner lateral wall of the capsule shell and is used for shielding or opening the drug releasing hole; a first magnet is rotatably arranged in the capsule shell and is driven to rotate by the external rotating magnetic field; a cylindrical cam is coaxially fixed to the first magnet and is used for converting the rotating torque of the first magnet into an axial pushing force to push the medicine pushing rod; a spring is arranged in the capsule shell and is used for applying an elastic force opposite to the axial pushing force to the medicine pushing rod; and a second magnet is fixedly arranged in the capsule shell and is used for keeping the capsule shell fixed under the action of an external static magnetic field. The application adopts a non-contact magnetic driving mode and can realize fixed-point drug releasing and multiple quantitative drug releasing.

The invention provides a thermal management method of a rotating magnetic field direct current motor, which comprises the following steps: acquiring multi-point temperature data from key parts in a stator winding of the direct current motor, sending the multi-point temperature data to a central processing unit in real time, and generating an initial temperature distribution matrix; according to the initial temperature distribution matrix, a convolutional neural network algorithm is adopted for analysis, if the temperature gradient exceeds a preset threshold value, the area is marked as a potential local overheating area, and a high-risk component list is determined; extracting a real-time temperature monitoring sequence from the high-risk component list, and predicting a future temperature trend by adopting a long-short-term memory network algorithm to obtain a predicted temperature curve sequence; and for the stability performance index sequence, recording a life shortening risk assessment log and integrating historical records, and determining a final thermal management reliability report through trend rise judgment and state optimization confirmation.

An ultra-high speed laser cladding device and a process based on the dual suppression of magnetic force and centrifugal force are provided, including a laser generator, a spectrometer, a powder device, a rotary tool and a magnetic field generator. The substrate is installed in the rotary tooling, through the driving device to rotate it. The magnetic field generator is used to generate a magnetic field in the rotary cylinder. The laser generator produces the first laser beam and the second laser beam with different energy through the spectrometer. They are both focused on the surface of the substrate. The powder conveyed by the powder device is sprayed to the surface of the substrate, laser cladded by the first laser beam and the second laser beam. The gas can quickly escape to ensure the density of the cladding layer and reduce the porosity.

The utility model discloses a kind of fresh air ventilation devices, belong to air film building application technical field, including mainframe shell, outer rotor, center stator and movable vane, wherein, eccentric position rotation is provided with outer rotor in the inside of mainframe shell, outer rotor then has several movable vanes and is inserted, the end of movable vane and the inner wall of mainframe shell abut sliding and the inner wall of mainframe shell is smooth cambered surface, therefore, movable vane will be with outer rotor rotation and do telescopic motion, and surface dust is scraped by outer rotor.And mainframe shell bottom installs scissors support, for supporting mainframe shell, and scissors support can be folded to save storage space.And end cap is set in the top of mainframe shell, and installs electric control box, the tail end of center stator is fixedly set on end cap, and is connected with electric control box circuit, the first end of center stator is inserted in the center of outer rotor, wherein, center stator power generation rotates magnetic field, thus to promote outer rotor rotation, to drive airflow flow.

An intravascular blood pump (1) comprises a pump housing (2) having a blood inflow (21) and a blood outflow (22), and an impeller (3) arranged in the pump housing (2) to be rotatable about an axis of rotation, wherein the impeller (3) has blades (31) which are dimensioned and shaped for conveying blood from the blood inflow (21) to the blood outflow (22). The blood pump (1) further comprises a drive unit (4) for rotating the impeller (3), the drive unit (4) comprising a plurality of posts (40) arranged about the axis of rotation (10), wherein each of the posts (40) comprises a stem portion (41) and a head portion (42). Coil windings (470) around the posts are controllable in sequence to generate a rotating magnetic field. The drive unit (4) further comprises a back plate (50) which engages with the end (44) of the stem portion (41) of the posts (40) opposite the head portion (42).

The invention relates to the field of medical instruments, and particularly discloses a drug release capsule device based on an external rotating magnetic field, the drug release capsule device comprises a capsule shell, liquid medicine is stored in the capsule shell, drug release holes are formed in the side wall of the capsule shell, and a spiral strip is arranged on the outer side wall of the capsule shell; a medicine pushing rod is arranged in the capsule shell in a sliding mode, a check block is fixedly connected to the medicine pushing rod, and the check block slides along the inner side wall of the capsule shell and is used for shielding or opening the medicine release hole. A first magnet is rotationally arranged in the capsule shell and is driven by an external rotating magnetic field to rotate; the first magnet is coaxially and fixedly connected with a cylindrical cam, and the cylindrical cam is used for converting the rotating torque of the first magnet into axial thrust to push the medicine pushing rod; a spring is arranged in the capsule shell and used for applying elastic force opposite to the axial thrust direction to the medicine pushing rod; and a second magnet is fixedly arranged in the capsule shell and is used for keeping the capsule shell fixed under the action of an external static magnetic field. Non-contact magnetic driving is adopted, and fixed-point drug release and multi-time quantitative drug release can be achieved.