213 results about "Electromagnetic coil" patented technology

The invention relates to the technical field of metal die-casting forming, and discloses a vacuum die-casting method for a high-reliability aluminum alloy motor end cover, which comprises the following steps: carrying out acoustic levitation purification treatment on an aluminum alloy melt; detecting the acoustic purity of the purified melt on line by adopting an acoustic characteristic sensing device; feeding the melt into a mold cavity for vacuum die-casting filling; and according to the detection result of the acoustic purity, an electromagnetic coil preset at the hot spot area of the mold is controlled in a feedforward mode, and magnetic field induction partition solidification of the hot spot area is achieved. According to the method, through the synergistic effect of melt purification and solidification control, micro bubbles and inclusions in the melt are removed through acoustic levitation purification firstly, then accurate magnetic field induction partition solidification is conducted on a hot spot area through feedforward control based on melt quality real-time data, formation of microscopic and macroscopic defects is effectively inhibited, and the quality of the melt is improved. The manufactured motor end cover is high in internal density and good in mechanical property and air tightness, and the product reliability is remarkably improved.

The invention relates to the technical field of flywheel energy storage equipment, in particular to a flywheel rotor dynamic balance self-adaptive adjusting method and system based on magnetorheological fluid. The method comprises the steps that the sealing state of a magnetorheological fluid cavity is detected through a pressure sensor, and it is ensured that the pressure in the cavity is stable and free of leakage; the non-contact displacement sensor executes zero calibration, and output signal fluctuation is controlled within a preset range; carrying out no-load test on a current output port of the self-adaptive control module; when the rotating speed rises from a static state to a preset rotating speed value, a sensor of the real-time monitoring module synchronously collects a radial vibration signal of the rotor, decomposes a fundamental frequency vibration component with the same frequency as the rotating speed, and calculates the amplitude and the phase of the unbalance; when the rotating speed is stabilized in a preset rotating speed interval, the self-adaptive control module enters a closed-loop adjusting state, and when an unbalanced phase is calculated according to detection, a corresponding compensation quadrant fan-shaped cavity is locked, and the current of an electromagnetic coil is adjusted; the problem of traditional adjustment lag is solved, and over-compensation and under-compensation under variable working conditions are avoided.

The invention discloses a node structure electric arc fuse wire additive manufacturing method, and belongs to the technical field of electric arc additive manufacturing. According to the method, the problems that in the prior art, due to uneven heat distribution, the joint binding force is insufficient, the machining allowance is low, and the welding gun collision risk is caused by too high material accumulation in a joint area are solved; the method comprises the steps that a welding gun deposits a first welding bead along an arcing point, when a second cross welding bead is deposited, a coaxial electromagnetic coil is arranged outside the welding gun, an external alternating magnetic field is generated to act on an electric arc, the electric arc and a molten pool oscillate periodically, and therefore the metal fluidity of the molten pool is enhanced; by applying the external alternating magnetic field, non-contact stirring of the molten pool can be achieved, an additional mechanical movement device is not needed, the molten pool has the advantages of being safe and clean, the fluidity of the molten pool subjected to magnetic arc oscillation stirring is higher, and the problems that materials at nodes excessively accumulate and protrude, and joints of the nodes are heated unevenly and shrink are solved.

The utility model discloses an electromagnetic coil winding device, which belongs to the technical field of winding equipment and comprises a fixed table and a movable frame, a tensioning and positioning mechanism is arranged on the rear side of the top of the fixed table, clamping mechanisms are arranged on two sides of the movable frame, each clamping mechanism comprises a mounting plate, a driving ring, an air cylinder, a connecting ring and a plurality of clamping plates, l-shaped plates are fixedly installed on the sides, away from each other, of the multiple clamping plates, inclined rods are fixedly installed at the other ends of the L-shaped plates, a plurality of inclined holes are formed in one side of the connecting ring, the inclined rods are slidably installed in the corresponding inclined holes, an annular rail is fixedly installed on one side of the connecting ring, and the annular rail is fixedly installed on the other side of the connecting ring. And a plurality of connecting rods are fixedly mounted on one side of the driving ring. The two ends of the coil framework can be clamped and fixed in multiple directions through the two clamping mechanisms, the clamping and fixing stability is guaranteed, the coil framework is prevented from inclining in the winding process, and the winding uniformity is guaranteed.

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 relates to the technical field of lithium battery pole piece rolling, and provides a heat-based roller type regulation and control method and system for a lithium battery pole piece roller press. The method comprises the following steps: S1, establishing a roller finite element mechanism model; s2, performing simulation by using a roller finite element mechanism model; s3, performing thermocouple distribution preliminary screening based on the temperature comprehensive contribution degree; s4, redundant preliminary screening thermocouple distribution points are eliminated based on data clustering analysis; s5, determining an optimal thermocouple distribution point combination; s6, constructing a dynamic thermal field matrix; s7, constructing a data driving model; s8, obtaining a joint prediction thermal convexity through joint prediction; and S9, the power of the electromagnetic coil and the edge water cooling flow are adjusted. The system comprises a roller heating device, an edge water cooling device, a temperature sensing network, a control platform, a regulation and control execution unit and a lithium battery pole piece roller press. Through accurate prediction of the thermal crown of the roller, real-time dynamic compensation of the roller shape is realized, and the thickness stability of the pole piece is improved.

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 invention discloses a hardness self-adaptive adjustment high-voltage insulation shielding cover which comprises a composite insulation cover body, the composite insulation cover body sequentially comprises an outer insulation layer, a middle magnetorheological elastomer interlayer and an inner attaching layer from outside to inside, and a miniature electric field sensor is embedded in the surface of the outer insulation layer and used for monitoring the intensity of a surrounding electric field in real time; the flexible electromagnetic coil is embedded in the middle magnetorheological elastomer interlayer; the intelligent induction energy storage module is integrated in a lightweight waterproof box at the top of the composite insulation cover body and comprises a magnetic field controller, a micro super capacitor, an electric field signal processor and a pressure signal converter, and the magnetic field controller is connected with the flexible electromagnetic coil through a wire; through the three-layer structure design of the composite insulation cover body and corresponding material selection, double guarantee of insulation protection and self-adaptive fitting is realized.

The invention belongs to the technical field of bridge steel shell hoisting construction, and particularly relates to a fine adjustment device suitable for stability of a gravity center changing curve type steel shell, the fine adjustment device comprises a steel shell, mounting angle blocks are symmetrically arranged on the side face of the upper end of the steel shell, and an adjusting mechanism is arranged at the upper end of each mounting angle block. According to the fine adjustment device, a flexible adjustment structure composed of the magnetorheological elastomer and the electromagnetic coil is arranged, and a steel cable traction adjustment mechanism driven by the hydraulic motor is combined, so that bidirectional precise regulation and control over the stability of the steel shell are achieved, and the shear modulus of the magnetorheological elastomer can be linearly regulated and controlled through the current of the electromagnetic coil; the stress change caused by gravity center shift can be quickly responded, and the dynamic unbalance force can be counteracted in real time.

The invention relates to the technical field of wastewater treatment, in particular to a wastewater filtration and adsorption combined treatment device and method based on a mixed bed. The treatment device optimizes a wastewater adsorption and filtration process, so that the treatment device combining a fixed bed and a fluidized bed can more efficiently filter wastewater. An electromagnetic coil is arranged in the fluidized bed, and under the synergistic effect of a magnetic field and water flow power, the magnetic adsorption particles are in a controlled suspension state in the fluidized bed. The directional constraint effect of the magnetic field on the particles can effectively restrain irregular collision of the particles, and the problem of serious abrasion caused by disordered flowing of the particles in a traditional fluidized bed can be fundamentally solved. When the treatment device needs to be flushed, the first valve between the fixed bed and the fluidized bed is closed, so that the fixed bed and the fluidized bed are mutually independent, the fixed bed and the fluidized bed are respectively flushed, and meanwhile, the ultrasonic vibration assembly is matched to assist the flushing operation, so that the flushing efficiency of the treatment device is greatly improved.

The application provides a dredging device for treating sewage in a river basin water environment, which comprises a mobile vehicle body, a suction pipe and a moving mechanism. The moving mechanism comprises a walking track, a rotating plate, a mounting plate, a containing box, a first electric push rod, a flexible sleeve, a second electric push rod, a sealing plate, a magnetorheological fluid, an electromagnetic coil and a main control unit. The mobile vehicle body moves on a shoal to perform dredging. If the shoal is relatively soft, the flexible sleeve is abutted against the top surface of the adjusting groove by the first electric push rod, the sealing plate is lifted by the second electric push rod, the magnetorheological fluid in the flexible sleeve is extruded, the magnetorheological fluid can push the flexible sleeve to deform outward, the top surface area of the flexible sleeve is increased, the electromagnetic coil is electrified, under the action of the magnetic field, the magnetorheological fluid becomes solid, the flexible sleeve can remain in a fixed form, finally, the flexible sleeve is transferred downward and contacts the shoal surface, the contact area is increased, the stability of the mobile vehicle body is ensured, the silt is sucked, and the water environment ecology is repaired.

The utility model relates to copper wire production technical field, concretely relates to a kind of copper wire production and processing's stretching device, including lubricating bucket and the conveying part for being immersed into the copper wire in lubricating bucket;Electromagnetic rod is located in lubricating bucket, it includes the sealing sleeve coaxially fixed in lubricating bucket and the electromagnetic coil coaxially located in sealing sleeve, for generating strong magnetic field and drive copper powder to the arc-shaped inner wall of lubricating bucket, fishing part is located in lubricating bucket, it includes the fishing ring coaxially slidingly located in lubricating bucket, the outer edge of the fishing ring contacts the inner wall of lubricating bucket.The utility model generates strong electromagnetic field by electromagnetic rod, since copper powder belongs to inverse magnetic material, it generates induced eddy current in alternating magnetic field, and then generates reverse magnetic field, forms repulsion with magnetic field source Lorentz magnetic force and is pushed to low magnetic field area by magnetic repulsion, copper powder can be pushed to the arc-shaped inner wall of lubricating bucket and gathered in real time, greatly extend the period of lubricating liquid cleaning or replacement, reduce its cleaning or replacement frequency.

The utility model relates to an electromagnetic coil, which belongs to the technical field of electromagnetic valves and comprises an electromagnet and a fixing seat, and the fixing seat is a plastic seat and is fixed on the electromagnet in a cast connection mode. According to the utility model, the adaptability of the electromagnetic coil is improved.

The utility model discloses a quick opening and closing type safety valve, which relates to the technical field of safety valves and comprises a valve seat and a valve cover, the valve cover is positioned on the valve seat, a valve rod is arranged in the valve cover, an adjusting nut is arranged at the upper end of the valve rod, and an electromagnetic coil mounted in the valve cover is arranged on the lower side of the adjusting nut. A spring located in the valve deck is arranged on the peripheral side of the valve rod, a guide sleeve is arranged in the valve seat and installed in the valve deck, and the lower end of the valve rod penetrates through the guide sleeve. Millisecond-level opening and closing of the valve clack and precise graded pressure relief are achieved through magnetic force driving, sudden drop of system pressure is avoided, the multi-stage stepped valve element is combined with the spiral flow channel to form centrifugal vortex, the surface of the valve element is actively washed, particulate matter deposition is effectively removed, flow resistance is reduced, the self-cleaning and wear-resisting characteristics are achieved, kinetic energy is buffered in cooperation with the damping ring, and the service life is prolonged. And the sealing structure is suitable for high-pressure, corrosive and particle-containing medium scenes.

This electromagnetic relay comprises: an electromagnetic coil (21) that generates a magnetic force by being energized; a first contact part (14); and a second contact part (121) that comes into contact with or separates from the first contact part as the electromagnetic coil is switched between being energized and not being energized, thereby opening / closing an energization path. In addition, the electromagnetic relay also comprises: a case (30) that accommodates the electromagnetic coil, the first contact part, and the second contact part therein; and heat-conducting members (44, 45) disposed outside the case. The heat-conducting members have one surface (441, 451) joined to the case and the other surface (442, 452) provided on the opposite side to the one surface and exposed to a space (30b) around the case, and have a higher thermal conductivity than the case.

The utility model relates to a device for conveying a conductive connecting element from a sending station to a receiving station, which is provided with a pipeline leading from the sending station to the receiving station and a first coil assembly, and the first coil assembly is provided with a first electromagnetic coil used for generating a first electromagnetic field in a conveying channel. A winding of the first electromagnetic coil surrounds a first section of the transfer channel, a first electromagnetic field induces an eddy current in the connecting element that accelerates the connecting element in the direction of the receiving station, and a second coil assembly is provided having a second electromagnetic coil for generating a second electromagnetic field in the transfer channel, a winding of a second electromagnetic field, which induces an eddy current in the connecting element that accelerates the connecting element in a direction away from the receiving station, surrounds a second section of the transfer channel, which is arranged closer to the receiving station than the first section. The equipment provided by the utility model can better control the connecting element to arrive at the receiving station.

The invention relates to a stimulation module combining galvanic and electromagnetic stimulation, consisting of a housing having: • two electrodes positioned to come into contact with the mastoids of the user and connected to a source of electric current, one of the electrodes being active, the other of the electrodes being passive • at least one electromagnetic coil for generating electromagnetic stimulation without contact, formed on an electrically insulating substrate, the substrate being associated with a heat sink • two separate compartments for housing, on the one hand, the electrical stimulation circuit connected to the electrodes and, on the other hand, the electromagnetic stimulation circuit supplying the coil • an electronic control circuit for controlling the sequences of electrical and electromagnetic stimulation, including a Bluetooth module for receiving remote control signals of the stimulation parameters.

The invention discloses a metal shell magnetic shielding structure of an electromagnetic coil heating source electrothermal furnace, which comprises a metal shell, a shell opening is arranged on the upper side surface of the shell, an electromagnetic coil corresponding to the shell opening is arranged in the metal shell, and a shielding plate is arranged on the upper side of the electromagnetic coil in the metal shell. The electromagnetic coil is used for generating an alternating magnetic field, so that the bottom of the iron pan generates induction eddy current heating under the alternating magnetic field, the energy transfer efficiency is improved, heat is quickly absorbed and uniformly dispersed, local overheating is reduced, and the service life of the electromagnetic coil is prolonged. Meanwhile, the shielding plate is arranged between the electromagnetic coil and the metal shell, an alternating magnetic field is shielded from acting on the metal shell, heating of the metal shell is avoided, the temperature of the metal shell is reduced by about 10 DEG C through experimental comparison, and the use safety is improved.

This invention discloses a fully automatic milling device for screw processing, relating to the field of screw processing technology. Through the cooperation of a sealing mechanism and a storage mechanism, this invention achieves automated replacement of the sealing plate. It can quickly adapt to sealing plates of different hole diameters according to changes in the outer diameter of the rod-shaped workpiece, effectively wrapping the outer wall of the workpiece and sealing the groove. It also includes auxiliary components to prevent processing debris from splashing into the external environment, ensuring operational safety and workshop cleanliness. Through the electromagnetic attraction between the electromagnetic coil and the drilling head, tapping head, and milling head, it achieves fully automatic and rapid tool changing, allowing flexible switching between drilling, tapping, and milling processes without manual intervention, significantly improving processing efficiency and automation. Furthermore, the auxiliary components generated during cutting are recycled for nut tightening and screw processing, achieving material reuse, effectively reducing production costs, and making it suitable for batch continuous production.

The utility model relates to relay technology field discloses a high voltage direct current relay, high voltage direct current relay includes: the coil framework, the coil framework is integral type structure, the kovalev alloy spare, kovale g alloy spare is located on the coil framework, and the annular structure is fixed on kovale g alloy spare, the ceramic cover, the ceramic cover is located in kovale g alloy spare, and the two sides of ceramic cover are fixed with the arch structure, the utility model discloses high voltage direct current relay, wherein designs integral type coil framework, can to the coil winding, increase the space in the enameled wire wire head winding process, promote the smoothness in enameled wire wire head access and winding process, improved the production efficiency of the automatic winding of electromagnetic coil, wherein kovale g alloy spare is separated from copper pipe, simplifies kovale g alloy spare's structure, improves production efficiency, guarantees kovale g alloy spare and ceramic structure's air tightness, and increases the arch structure on ceramic structure, provides the space of installation layout for copper pipe, auxiliary contact structure etc.

The utility model discloses a vehicle chassis area controller and a vehicle, the controller comprises at least one single chip microcomputer, a brake system solenoid valve driving module and a shock absorber solenoid coil driving module, the output end of the single chip microcomputer is connected to a brake system solenoid valve through the brake system solenoid valve driving module, and the output end of the single chip microcomputer is connected to a shock absorber solenoid coil driving module. The output end of the single-chip microcomputer is connected to a shock absorber through a shock absorber electromagnetic coil driving module. The braking system electromagnetic valve driving module is used for driving a braking system electromagnetic valve to adjust the braking pressure of wheels; and the shock absorber electromagnetic coil driving module is used for controlling the target current of the vehicle shock absorber electromagnetic coil so as to adjust the damping force of the electric control shock absorber. The electric control shock absorber system has the advantages that the electric control shock absorption function and the electric control brake function of a vehicle are integrated in one domain controller, so that the manufacturing cost of the whole vehicle is reduced, the performance of the electric control shock absorber system is improved, and meanwhile the original functions of the two systems are not affected.

The application relates to the technical field of radio frequency switches, in particular to a single-pole double-throw type load radio frequency switch connecting rod transmission synchronous switching structure which comprises a fixed base, a first channel switching plate and a second channel switching plate, conductor spring sheets arranged below the two ends of the first channel switching plate and the second channel switching plate, conductor spring sheets penetrating through the base and riveted with spring top rods, an electromagnetic coil and a coil iron core, the electromagnetic coil and the coil iron core being arranged above the two ends of the second channel switching plate, and the coil iron core being arranged on the inner side of the electromagnetic coil. The application adopts a center connecting rod to connect two groups of symmetrical channel switching plates, has small changes, a compact structure and optimized internal space, cancels a group of channel switching electromagnetic coils and other electromagnetic components, reduces assembly time, improves efficiency, reduces heating components after electrification such as electromagnetic coils, generates less heat in the switch, reduces the failure rate, the structure reduces part of components, and can reduce material and processing costs.

To provide an internal combustion engine control device capable of improving injection accuracy of a fuel injection valve.SOLUTION: The engine control device 150 includes the drive circuit 157 that switches between the energized state and the non-energized state of the solenoid coil 13b that opens and closes the injector 13, and the microcomputer 152, the electric signal indicating that the application voltage applied to the solenoid coil 153a has reached the timing of executing the interruption processing is input to input port 13b, and the microcomputer 152 derives the valve-opening response delay length with respect to the valve-opening command based on the electric signal input to input port 153a while the valve-opening command for opening the injector 13 is being outputted to the drive circuit 157. The valve-opening response delay length is a length of time from when the microcomputer 152 outputs the valve-opening command to when the application voltage reaches a predetermined value while increasing, and the application voltage is detected based on the current supplied to the solenoid coil 13b.SELECTED DRAWING: Figure 6

This application discloses an electromagnetic coil assembly and a normally open solenoid valve. The electromagnetic coil assembly includes a coil frame, a coil winding, a connecting terminal, a lead wire, and a plastic encapsulation shell. The coil frame has a cylindrical body and end caps at both ends. The coil winding is wound around the cylindrical body. The connecting terminal is fixed to the side of the end cap and electrically connected to the lead wire of the coil winding. One end of the lead wire is connected to the connecting terminal, and the other end extends along the outer end face of the end cap and crosses the edge of the end cap away from the connecting terminal to form an exposed section. The plastic encapsulation shell covers the above components and exposes the exposed section of the lead wire. By extending the lead wire arrangement path, increasing the distance between the welding point and the lead wire end, and increasing the plastic encapsulation thickness, the risk of moisture intrusion is reduced, corrosion and poor contact at the welding point are avoided, and the reliability and service life of the electromagnetic coil assembly are improved.

The utility model discloses a metal base material surface gradient coating preparation device which comprises a base, a rotating disc is arranged at the top of the base, surrounding plates are evenly and fixedly connected to the side, away from the base, of the rotating disc and close to the edge of the rotating disc, each surrounding plate is of an annular structure, a processing cylinder is inserted into each surrounding plate, and a containing plate is arranged in each processing cylinder. The top of the rotating disc is provided with a top plate, the side wall, opposite to the rotating disc, of the top plate is fixedly connected with a storage box, and the position, opposite to the processing barrel, of the bottom of the storage box is rotationally connected with a smearing roller. In this way, the coating material can be evenly smeared on the base material in cooperation with rotation of the smearing rollers, the multi-layer smearing effect can be achieved by arranging the multiple storage boxes and the smearing rollers, the base material falls back into the surrounding plate after smearing, and the metal base material is heated through the electromagnetic coil in the surrounding plate.

The utility model discloses a magnetic latching fastener for an intelligent electronic lock locking mechanism. The magnetic latching fastener comprises a shell, a shielding iron pipe, a rear blocking iron pad, a gasket, an electromagnetic coil, a copper pipe, a strong magnet, a demagnetizing element, a spring, an iron pin and a copper separation blade. The fastener is simple in structure, the shell is of an integrated structure formed by zinc alloy in a die-casting mode, mold production is facilitated, the qualified rate of finished product assembly is guaranteed, production and assembly time and economic cost are greatly saved, product quality is greatly improved, internal component mechanisms are stable, and iron pins respond rapidly.

The utility model relates to the technical field of electromagnetic coil production equipment, especially to a core riveting machine, including machine table and the wire package loading belt and finished product unloading belt and assembly station of setting on machine table, the assembly station is provided with a plurality of for fixing wire package fixture, the wire package transverse moving mechanism of setting on machine table and can adjust wire package angle, the core assembly mechanism that meets with wire package loading belt is sequentially arranged along wire package transverse moving mechanism movement direction, the yoke iron assembly mechanism of setting in the core assembly mechanism side, the core riveting mechanism of setting in yoke iron assembly mechanism side, the feeding end of finished product unloading belt is provided with dust blowing mechanism, the core assembly mechanism and yoke iron assembly mechanism set in assembly station side. The utility model provides a kind of core riveting machine, can realize the automatic assembly to yoke iron and core, production efficiency is high, reduce the labor intensity of operator simultaneously, improve the yield of product.

The present application relates to the field of textile machinery and equipment damping, specifically warp knitting machine bed damping device and method thereof; containing damping base, negative Poisson's ratio lattice metal bearing framework, corrugated air chamber, venturi micro flow channel, composite fluid and electromagnetic coil and controller and other modules; The system fills the shear thickening and magnetorheological mixed composite fluid in the bearing cavity, cooperates with the bearing framework with three-dimensional interconnected pores, and occurs local shear thickening under high frequency impact; The core is that the controller extracts the high frequency vibration characteristics of the main shaft motor, combines the air chamber pressure pulse to solve the dynamic kinetic energy and total stiffness demand, and actively adjusts the electromagnetic coil current and duty cycle; The present application effectively avoids the dynamic hardening defect of traditional hydraulic damping, and realizes the active adjustment type energy consumption and self-adaptive compensation of equivalent stiffness for high frequency periodic impact.

A wrapping post (10) for connection to a coil body of an electromagnetic coil, the wrapping post (10) having a rod-shaped post body (11) formed from a wire part and has a polygonal cross section or circular cross section, and the post body (11) being provided with a row arrangement (15) of surface elements on its surface (13, 14) in the longitudinal direction (16), the surface elements extending transversely to the longitudinal direction (16) and being at least partly formed as recesses (17), the recesses (17) only extending over a partial circumference of the post body (11) in the circumferential direction, the recesses (17) extending in the circumferential direction between adjacent longitudinal edges (18, 19) of the polygonal cross section in such a manner that the recesses (17) are spaced apart from the longitudinal edges (18, 19) or extend over a partial circumference of the circular cross section.

The application discloses a variable stiffness and damping automobile self-tuning electromagnetic suspension, which comprises a stator shell, end covers fixedly connected to both ends of the stator shell and a mover inner core; the mover inner core is movably installed in the stator shell, two groups of coils are arranged on the mover inner core, and a plurality of tooth-shaped structures are arranged on the stator shell and the mover inner core on the left and right sides of each group of coils; a conductive copper ring is arranged at the inner wall of the stator shell on the side of one group of coils; linear bearings and supporting springs are sleeved on both ends of the mover inner core; one end of the supporting spring is fixed to the end cover, and the other end is directed to the shaft shoulder of the mover inner core; the end of the mover inner core on the side of the conductive copper ring is led out from the same side end cover and connected with a knuckle bearing, and the end cover on the other side is connected with the knuckle bearing. The application introduces two groups of electromagnetic coils to control the magnetic field intensity of electromagnetic springs and electromagnetic dampers, so that the stiffness and damping of the shock absorber can be independently tuned.