2177 results about "Magnet coil" patented technology

The invention discloses an intelligent monitoring system for an assembled net rack shear structure, and relates to the technical field of net rack structure health monitoring. A fiber grating sensor, an ultrasonic array, an electromagnetic coil and an energy assembly are integrated through a sensor integration module and a modular support; optical fiber strain, ultrasonic signals and electromagnetic impedance data are collected in real time; after the feature fusion module extracts key features through preprocessing, a fusion feature vector is obtained through an adaptive manifold projection fusion method; the shear force value prediction module takes the fusion feature vector as input, and obtains a shear force value prediction model through training by using an LSTM (Long Short Term Memory) model; and the net rack judgment module is combined with a DBSCAN algorithm to divide neighbor sensor network groups, and is used for judging the structure defect type based on a local anomaly concentration ratio LAC and an overall cooperative change rate GCR. According to the system, intelligent monitoring of the fabricated net rack shear structure is realized, and the monitoring precision and the defect identification accuracy are improved.

The invention relates to the technical field of low-voltage electric appliances, in particular to a magnetic flux release, an isolating switch and a power supply system. The electromagnetic coil is installed on the support, and the ejector rod is inserted into the electromagnetic coil in a sliding mode. In the electromagnetic coil, at least two movable iron cores which are arranged at intervals in the axial direction are arranged on the ejector rod; when the electromagnetic coil is powered on, at least one movable iron core moves in the axial direction of the ejector rod and drives the ejector rod to move. According to the embodiment of the invention, at least two movable iron cores are arranged in the magnetic flux release, so that differentiated response can be realized for different faults.

The invention relates to the technical field of electromagnetic coils, in particular to a laminated special-shaped plane spiral coil winding. The laminated special-shaped planar spiral coil winding is composed of at least two coil layers, and each coil layer is composed of a single special-shaped planar spiral coil. The inner ring part of the special-shaped plane spiral coil is a concentric plane spiral coil, and the outer ring part of the special-shaped plane spiral coil is a tooth-shaped spiral coil extending along the outer periphery of the concentric plane spiral coil; all phases of the coil winding are different in layer, the electrified magnetic field center of each coil layer deviates from the geometric center, and the projection of the magnetic field center of each phase in the plane of the coil winding is in central symmetry distribution. The invention innovatively provides a laminated special-shaped planar spiral coil winding, and provides a squirrel-cage equivalent rotor on the basis of the laminated special-shaped planar spiral coil winding, so as to provide competitive choices for reducing copper loss and improving heat dissipation, magnetic conductivity, structural strength and economic cost of an axial flux motor winding.

The invention relates to the technical field of excavator bucket rods, and provides a bucket rod composite damping device and an excavator. The device comprises a shell composed of a base, an outer shell and a stress shell; the magneto-rheological buffer device is installed in the shell and composed of a lattice structure made of magneto-rheological elastomer materials and magneto-rheological fluid filled in gaps corresponding to the lattice structure, and a plurality of sound absorption holes are formed in each cell element wall in the lattice structure; the electromagnetic device is located in a containing cavity formed in the lattice structure and is composed of a magnetic core and an electromagnetic coil; the anti-vibration pad and the stress plate are embedded in the top of the shell and are in contact with the stress plate; the damping springs are arranged on the periphery of the shell and fixedly connected between the stress plate and the base; the vibration monitoring module is used for collecting vibration data of the bucket rod in real time and transmitting the vibration data to the intelligent control module, and the intelligent control module is used for adjusting the output magnetic field intensity of the electromagnetic coil according to the vibration data so as to adjust the viscosity of the magnetorheological fluid in real time.

The invention provides a method and a system for measuring plasma current in a quasi-ring symmetrical star simulator, and relates to the technical field of star simulators, and the method comprises the steps: determining a sensor design index according to a bootstrap current simulation calculation result, and converting the design index into an actual arrangement scheme according to an installation environment constraint; all the magnet coils are independently excited in a plasma-free state, wall eddy current interference signals generated by the magnet coils are calibrated, and thus wall eddy current calibration voltage signals are output; a sensor in an actual arrangement scheme is used for synchronously collecting a total original induced voltage signal including plasma current and wall eddy current; an integral voltage signal representing the total current is output; and compensating the integral voltage signal by using the wall eddy current calibration voltage signal, and inverting the final measurement value of the plasma current in the quasi-ring symmetric star simulator. The device and the method have the beneficial effects that the interference of a stray field on a measurement result is weakened, and a high-precision diagnostic tool is provided for the plasma physical research of the star simulator.

The invention discloses a magnetic suspension non-contact driving self-balancing precision machine core which comprises a metal disc, a magnetic suspension assembly is arranged at the top of the metal disc, a connecting assembly is arranged on the magnetic suspension assembly, a pluggable stable supporting assembly is arranged on the metal disc, the magnetic suspension assembly comprises a Halbach annular permanent magnet array and an electromagnetic coil, and the Halbach annular permanent magnet array is connected with the connecting assembly. The Halbach annular permanent magnet array is installed at the top of the metal disc, and the electromagnetic coil is installed at the top of the metal disc and located in the Halbach annular permanent magnet array. Through composite magnetic suspension driving of the Halbach annular permanent magnet array and the electromagnetic coil, no mechanical contact exists between the suspender and the metal disc, the friction loss of traditional gear meshing is eliminated, no lubrication requirement exists, the problem of lubricating grease volatilization or aging is avoided, the stable supporting assembly is controlled through a pressure sensor and an electric push rod in a closed-loop mode, and the stability of the stable supporting assembly is improved. The height of the supporting column is adjusted in real time, so that the whole device is in a horizontal state, and the magnetic suspension system is not affected by inclination of a mounting plane.

The invention relates to the technical field of electromagnetic coils, in particular to a laminated planar spiral coil winding. The laminated planar spiral coil winding is formed by laminating at least two layers of planar spiral coils, the spiral center fitting line formed by each turn of wire is linear, the planar spiral coils occupy the whole winding plane, the strong magnetic center deviates from the geometric center of the planar spiral coils, and the phases of the winding are different in layer. The invention aims to provide competitive choices for the axial flux motor winding, such as high copper full rate, low copper loss, large air gap, easy heat dissipation and low production cost.

The invention relates to the technical field of coating testing devices, and particularly discloses an induction cooker glass ceramic functional coating testing device which comprises a base and a detection box located on the base, a detection cavity is formed in the detection box, a testing table is arranged in the detection cavity, and the testing table comprises a testing execution mechanism and a testing placement seat; the test execution mechanism comprises a friction disc, an electromagnetic coil is arranged in the friction disc, and a groove which is spirally distributed is formed in the bottom of the friction disc; the test placement seat comprises a loading table of which the middle of the top is provided with a to-be-tested coating panel in a position corresponding to the friction disc, the periphery of the top of the loading table is provided with a convex check ring, the upper part of the convex check ring is provided with a nozzle corresponding to the to-be-tested coating panel, and the nozzle is communicated with a storage tank arranged at the bottom of the loading table through a pressurizing pipeline; a magnetorheological abrasive is stored in the storage tank; the device has the advantages of high test precision and real test simulation.

The invention discloses a core shooter with a quick mold changing structure and a matched core box, and relates to the technical field of mold manufacturing. A core shooter movable plate is provided with a seam allowance groove and an electromagnetic coil, a core box upper mold is provided with a seam allowance boss with a permanent magnet, and three-stage magnetic coupling control is achieved through a control system, specifically, during mold closing, homopolar repulsive force guiding is conducted to avoid collision, during positioning, heteropolar attraction force locking is conducted, and during mold changing, homopolar repulsive force pushing separation is conducted. And three-dimensional accurate positioning and mechanical redundancy locking are formed by a clamping jaw clamping mechanism driven by a double-acting oil cylinder under the assistance of taper fit of right-angle limiting grooves in the four corners of the supporting plate and positioning blocks of the fixing plate. Through magnetic coupling automatic guiding and mechanical cooperative clamping, the mold changing time is shortened to be within 2 minutes from 30-40 minutes, single-person operation is achieved, the positioning precision and the vibration resistance are improved, the labor intensity is remarkably reduced, and the mold changing device is suitable for efficient and continuous production in the casting industry.

The invention relates to the technical field of X-ray tube control, and discloses a control method and device for a controllable flying focus X-ray tube, and the method comprises the steps: building an orthogonal electromagnetic deflection system based on an electron beam flight path of the X-ray tube, and the orthogonal electromagnetic deflection system comprises an X-direction electromagnetic coil and a Y-direction electromagnetic coil; creating a conversion relation for converting the target focus position function into an electromagnetic coil current value; executing nonlinear magnetic field response compensation to obtain high-speed switching control signals of the X-direction electromagnetic coil and the Y-direction electromagnetic coil; and performing focus trajectory prediction based on the high-speed switching control signal to obtain a focus motion trajectory formed by the electron beam on the target material, and performing thermal load distribution optimization on the focus motion trajectory to obtain a focus position control scheme for uniform distribution of the surface temperature of the target material. Accurate positioning control of the electron beam on the target material is achieved, and the X-ray imaging quality is improved.

The utility model relates to the technical field of fusion reactors, in particular to a magnetic confinement fusion device with a low-temperature magnet, which comprises a magnet shell, a magnet coil arranged in the magnet shell and an outer Dewar arranged outside the magnet shell, a fixed supporting structure is arranged between the outer end face of the second end of the magnet shell and the inner end face of the outer Dewar, and one end of the magnet shell is fixed to the outer Dewar. A gap is formed between the first end part and a first outer Dewar fixing block fixed on the outer Dewar in the radial direction, the first end part is connected with a first magnet shell fixing block positioned on the first end part through a first bolt, one end of the first bolt is fixedly connected, and the other end of the first bolt can move freely. When the magnet shell deforms, the magnet shell can adapt to radial and axial expansion / contraction deformation of the first end part, the stress applied to the outer Dewar due to the deformation of the magnet shell caused by the temperature change of the magnet coil is reduced, and the safety of connection between the magnet shell and the outer Dewar is improved.

The invention discloses a method for rapidly predicting the shape stability of a bird body emitted by a multistage electromagnetic coil, and the method comprises the steps: 1, inputting a structural parameter and an electrical parameter according to a bore-out speed requirement; 2, establishing a prediction model of the multistage electromagnetic coil transmitting device according to the parameters in the step 1; step 3, carrying out iterative calculation by adopting a forward difference method to obtain bird jerk after the cartridge case armature passes through the current-stage driving coil; 4, the bird body deformation stability in the current-level launching process is judged; 5, judging whether the armature displacement of the cartridge case meets the requirement or not, and if not, performing iteration at the current stage; if yes, executing the step 6; 6, setting the current, the mutual inductance and the mutual inductance gradient to be 0, and repeating the step 3 to carry out emission iterative calculation of the next-stage electromagnetic coil; 7, repeating the steps 4-6 until the prediction model reaches a preset out-of-bore speed; and step 8, outputting the final acceleration, displacement, speed and bird jerk curve of the cartridge case armature.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention discloses a shunt release of a circuit breaker, and belongs to the technical field of circuit breakers, the shunt release comprises a base, a quick release mechanism, a soft start mechanism and a movable iron core, the two sides of the base are provided with mounting bolts, the mounting bolts are used for fixing the base, the top of the base is provided with an adjusting seat, the two sides of the adjusting seat are connected with the base through connecting bolts, and the adjusting seat is connected with the base through connecting bolts. The top of the adjusting seat is provided with a quick release mechanism, the quick release mechanism is internally provided with an electromagnetic controller, and the electromagnetic controller is internally provided with an electromagnetic coil. The device has the beneficial effects that an adjusting bolt in a compensation mechanism is rotated, the adjusting bolt drives a sliding block to move, and the sliding block moves to further drive a push plate to move; the push plate pushes the other end of the reset spring, so that the reset spring is extruded additionally, the elasticity of the spring is compensated, and the problem that the reset speed of the pull rod is decreased due to elasticity attenuation of the reset spring is effectively solved.

The invention discloses a rotary clamping tool clamp for a numerical control machine tool, and relates to the technical field of numerical control machining, the rotary clamping tool clamp comprises a machine tool body, a working table for placing a workpiece is arranged in the machine tool body, and a clamping plate for clamping the workpiece is arranged on the upper side of the working table. According to the rotary clamping tool clamp for the numerical control machine tool, the sliding rod can move under the abutting action of the abutting groove, the sliding rod slides towards the center of the working table top under the limiting action of the sliding groove, and therefore a workpiece is clamped and limited, and the situation that the machining effect is affected due to the fact that the position of the workpiece deviates during machining is prevented; when the machine tool body rotates, an annular magnetic field can be generated, at the moment, a magnetic block interacts with a magnetic field of an electromagnetic coil to drive a swing frame to periodically swing along the outer side of a limiting shaft, a knocking hammer knocks a vibration piece to transmit vibration force to the inner wall of the machine tool body, and therefore splashing waste chips are prevented from being attached to the inner wall of the machine tool body.

A robotic medical device system for performing an operation on a patient includes a magnetic field source configured to generate a first magnetic field, an electrical current source configured to generate one or more selective electrical currents, and a micro robotic arm inserted within the patient. The micro robotic arm includes semi-flexible tubing configured to house a tool for performing the operation within the patient, and one or more joints formed in the semi-flexible tubing. Each of the joints includes a magnetic coil that is wrapped around the semi-flexible tubing. The magnetic coil is configured to receive one of the selective electrical currents generated by the electrical current source and generate a second magnetic field from the received one of the selective electrical currents. Each joint is configured to move the tool within the patient in accordance with an interaction between the first magnetic field and the second magnetic field.

The invention discloses a mechanism and data fusion driven low-voltage electromagnetic coil insulation residual life prediction method, and belongs to the technical field of power equipment state monitoring and predictive maintenance. The method comprises the following steps: firstly, constructing a creep finite element simulation model of the turn-to-turn insulating coating of the electromagnetic coil, and determining a creep quantity as an insulating health index with a clear physical meaning; then establishing a mapping relationship between electrical parameters such as high-frequency impedance and the like and creep variables, and realizing accurate trend prediction of the electrical parameters and the corresponding creep variables by adopting a lightweight deep learning model (Windows Mixer); and finally, fusing a failure threshold value determined based on a creep mechanism with a data-driven prediction result so as to improve generalization and accuracy of a prediction model. According to the invention, an intelligent prediction tool with high precision and low resource consumption can be provided for operation and maintenance of the electromagnetic coil.

The invention provides a fiber material reinforced ultrahigh-pressure direct-acting electromagnetic valve, which belongs to the technical field of electromagnetic valve design and comprises a valve body, a sealing pipe assembly, a winding body, a movable iron core assembly, a valve port sealing element, an electromagnetic coil and a magnetic conductive shell. Due to the adoption of the innovative structural design reinforced by the fiber material, the long-standing contradiction between the loading capacity and the magnetic circuit efficiency in the field of ultrahigh-pressure electromagnetic valves is skillfully solved, the overall mechanical property of the electromagnetic valve is optimized by the structure, and the magnetic circuit efficiency is guaranteed; meanwhile, the mechanical property of the movable part can be effectively enhanced due to the high-strength characteristic of the fiber material, so that the performance of the movable part is improved, the dynamic response hysteresis bottleneck is effectively overcome, and the response speed is increased; at the sealing part, the overall strength and stability of the sealing part can be enhanced through reinforcement of the fiber material, meanwhile, the sealing part can be prevented from losing efficacy due to medium corrosion through good corrosion resistance of the fiber material, the hidden danger of sealing instability in the high-pressure environment is thoroughly eliminated, and sealing reliability is guaranteed.

A phased antenna array in a package is provided. The phased array antenna in a package comprises an antenna array with an integrated passive beamformer network, and at least one actuation mechanism. The passive beamformer network comprises at least one phase shifter, and each of the at least one phase shifter comprises a transmission line having a slow-wave structure and a ceramic. Each of the at least one actuation mechanism comprises a magnet and an electromagnet coil, where the magnet is coupled to the ceramic. The at least one actuation mechanism configured to increase or decrease a gap between the transmission line and the ceramic.

The application discloses a rotary type clamping tool clamp for a numerical control machine tool and relates to the technical field of numerical control machining. The numerical control machine tool comprises a machine tool body, the inside of the machine tool body is provided with a workbench for placing workpieces, and the upper side of the workbench is provided with a clamping plate for clamping the workpieces. The numerical control machine tool, the sliding rod starts to move under the abutting action of the abutting groove, and the sliding rod slides to the center of the workbench under the limiting action of the sliding groove, so that the workpiece is clamped and limited, and the position of the workpiece is prevented from deviating during machining, thereby affecting the machining effect. When the electromagnetic coil is electrified, a ring-shaped magnetic field is generated, at this time, the magnetic block interacts with the magnetic field of the electromagnetic coil, drives the swing frame to periodically swing along the outside of the limiting shaft, and the knocking hammer knocks the vibration piece to transmit the vibration force to the inner wall of the machine tool body, thereby preventing the splashed debris from adhering to the inner wall of the machine tool body.

The invention relates to the technical field of switch technology, in particular to a residual current action photovoltaic protection switch, which comprises a shell, a fixed contact system, an operating mechanism I, an operating mechanism II, an arc extinguishing system and an electronic monitoring unit, and is characterized in that the fixed contact system, the operating mechanism I, the operating mechanism II, the arc extinguishing system and the electronic monitoring unit are arranged in the shell; a permanent magnet is arranged in the side wall of an arc extinguish chamber of the arc extinguish system, a second electromagnetic coil is arranged on the bottom wall of the arc extinguish chamber of the arc extinguish system, and a magnetic field generated by the permanent magnet is perpendicular to a magnetic field generated by the second electromagnetic coil. A magnetic field generated by the permanent magnet and a magnetic field generated by the second electromagnetic coil are overlapped, so that the arc is lengthened under the acting force of the magnetic field, an arc channel is arranged on the arc chute in a matched mode, a spiral groove is formed in the arc channel, the arc moves along the spiral groove, and the motion path of the arc is lengthened until the arc disappears.

The invention discloses a hydraulic mechanism for a water-cooled magnet structure with high mechanical stability. The hydraulic mechanism comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The water-cooled magnet has the advantages that axial stress application can be carried out on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, and the high mechanical stability of the water-cooled magnet is improved.

The application provides a normally open large-flow switching electromagnetic valve and a hydraulic control unit of an automobile brake system. The electromagnetic valve comprises an electromagnetic coil, a valve shell, a moving iron, a valve core, a small-flow valve seat and a large-flow valve seat. An accommodating space is formed in the valve shell. The valve core, the small-flow valve seat and the large-flow valve seat are sequentially arranged in the accommodating space from top to bottom. The valve core is connected with the moving iron, and the electromagnetic coil is arranged around the moving iron and the valve shell. A first elastic member is arranged between the valve core and the small-flow valve seat. The small-flow valve seat and the large-flow valve seat are connected through a second elastic member. When the electromagnetic coil is powered off, the valve core opens a small-flow port, and the small-flow valve seat opens a large-flow port, so that the electromagnetic valve is opened with large flow. When the electromagnetic coil is powered on, the valve core closes the small-flow port, and the small-flow valve seat closes the large-flow port, so that the electromagnetic valve is closed. The application can satisfy the normally open and large-flow capacity of the electromagnetic valve, so as to realize rapid pressure regulation.

The invention discloses a reed type nozzle baffle permanent magnet type electrical conversion module which comprises a shell, an electromagnetic coil, a nozzle, a spring, a baffle, an upper cover and a permanent magnet. The shell comprises a magnetic core and an outer wall, the electromagnetic coil is arranged in the shell, and the magnetic core is located in the center of the electromagnetic coil; the nozzle is arranged on the upper portion of the magnetic core, and gas flows into the magnetic core from the lower portion of the shell and then flows out of the nozzle. The baffle plate is fixed on the shell through the spring and is just positioned above the nozzle; the upper cover and the shell are fastened to form a complete shell; and the permanent magnet is arranged in the center of the upper cover and is just positioned above the baffle plate. The position of the baffle can be changed by adjusting the current of the electromagnetic coil, so that the gas pressure and flow at the outlet of the nozzle are adjusted. According to the invention, through ingenious structural design and structural parameter optimization, the technical effects of lower power consumption, higher sensitivity and higher gas pressure bearing are achieved.

The pressure release valve comprises a shell and a fixing sleeve arranged on the shell, an installation cavity is formed in the shell, an electromagnetic coil assembly is arranged in the installation cavity, the magnetic isolation sleeve is inserted in the installation cavity, the magnetic isolation sleeve is connected between the shell and the fixing sleeve in an abutting mode and isolates the installation cavity, and the electromagnetic coil assembly is arranged in the magnetic isolation sleeve. A movable valve element is arranged on the magnetism isolating sleeve in a sliding mode, and the end of the movable valve element is connected with a sealing piece.

The invention discloses an internally-inserted water-cooled magnet device for a high-field hybrid magnet. The internally-inserted water-cooled magnet device comprises a container assembly and a magnet coil assembly arranged in the container assembly. The container assembly comprises an upper barrel assembly, a container end cover, a hydraulic machine assembly, a center pipe assembly, an inner supporting assembly, a middle barrel assembly, a lower barrel assembly and an electric connecting assembly. The hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention relates to a device (10a, 10b, 10c) for transporting electrically conductive connecting elements (12a, 12b) such as rivets or screws from a transmitting station to a receiving station, comprising a line (20, 20c) enclosing a transport channel (22, 22c) for the connecting elements (12a, 12b) and leading from the transmitting station to the receiving station, and comprising a first coil arrangement (24, 24c) with at least one first magnetic coil (26, 26c) for generating a first electromagnetic field in the transport channel (22, 22c), the windings of which coil circulate around a first section (28, 28c) of the transport channel (22, 22c), the first electromagnetic field inducing eddy currents in the connecting elements (12a, 12b) which accelerate the connecting elements (12a, 12b) in the direction of the receiving station.According to the invention, a second coil arrangement (30, 30c) with at least one second magnetic coil (32, 32c) is provided for generating a second electromagnetic field in the transport channel (22, 22c), the windings of which run around a second section (34, 34c) of the transport channel (22, 22c), which is arranged closer to the receiving station than the first section (28, 28c), wherein the second electromagnetic field induces eddy currents in the connecting elements (12a, 12b) which accelerate the connecting elements (12a, 12b) in the direction away from the receiving station.

The invention discloses a novel internally-inserted water-cooled magnet container assembly for a hybrid magnet with high mechanical stability, which comprises an upper cylinder component, a container end cover, a hydraulic machine component, a central tube component, an inner support component, a middle cylinder component, a lower cylinder component, an electric connection component and a first conductive flexible connector, and a magnet coil assembly comprises a plurality of radially-sleeved coils; the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is increased, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, the dismounting and maintenance process of the mixed internally-inserted water-cooled magnet device is simple and rapid, and the efficiency is high. And the dismounting efficiency is improved.

An actuator for externally manipulating a clutch within a machine rotatable about an axis is provided with a driving unit including a plurality of magnetic coils arranged around the axis, each of the coils being arranged to generate a magnetic flux in a direction parallel to the axis; an armature disposed coaxially with the axis and opposed axially to the driving unit, the armature being movable axially; and a plunger coupled with the armature to transmit axial motion to the clutch.

The invention discloses an electromagnetic ejection type impact testing machine device and a testing method, and belongs to the technical field of impact testing. The problem that when an existing impact testing machine needs a high impact speed, the device also needs a large acceleration distance is solved. The first electromagnetic main track and the second electromagnetic main track are fixedly connected to the track support in the length direction, the two electromagnetic auxiliary tracks are fixedly connected to the portions, on the two sides of the first electromagnetic main track, of the track support respectively, and the two electromagnetic auxiliary tracks, the first electromagnetic main track and the second electromagnetic main track each comprise two parallel linear tracks. The linear track is formed by arranging a plurality of stators in the length direction, and each stator is wound with an electromagnetic coil. According to the invention, through the electromagnetic track acceleration device, a large impact speed can be obtained in a small acceleration distance, the automation degree of an impact test is improved to a great extent, and flexible adjustment and accurate control of impact gears are realized.