228 results about "Magnetic damping" patented technology

The utility model belongs to a bridge support, and particularly relates to a damping-controllable rigidity-variable shock insulation support. Comprising an upper seat plate, a spherical crown plate, a middle seat plate and a lower seat plate, the upper seat plate and the middle seat plate are positioned and connected through a shear plate and a shear bolt; the limiting mechanism is composed of a limiting check block and a limiting groove, the electromagnetic damping mechanism is composed of a magnet, a high-strength spring and a sheath coil, and the control device is composed of a ground motion sensor, a central processing module and a power supply module. The problems that in the prior art, the overall dimension of a support is too large, and the horizontal rigidity cannot be adjusted and changed once the horizontal rigidity is determined are solved, and the support has the advantages that the overall dimension of the support is small, the horizontal rigidity and damping are adjustable, and cooperative stress under the earthquake working condition of all piers is achieved.

The invention relates to a damping spring device suitable for industry or life, in particular to a magnetic damping spring. The magnetic damping spring comprises a supporting cylinder, a force guiding piston, a force guiding piston blocking piece, a supporting rod and two or more magnets. The force guiding piston blocking piece is arranged on the upper portion of the supporting cylinder. The supporting cylinder is of a cylindrical structure, one end of the supporting cylinder is sealed and is a bottom surface, and the other end is of an opening structure for the supporting rod to penetrate; the lower end of the supporting rod penetrates through the force guiding piston blocking piece to be connected with the force guiding piston, and the upper end extends out of an opening in the upper end of the supporting cylinder. A groove is formed in the inner bottom surface of the supporting cylinder, and a magnet A is placed in the groove; a groove for placing the magnet B is formed in the lower bottom surface of the force guiding piston; the supporting rod can conduct resultant force of vertical vibration generated by axial vibration, horizontal vibration and vertical vibration to the force guiding piston, the force guiding piston drives the magnet B to extrude downwards to generate repulsive force which is gradually increased with the distance space of the magnet A, the repulsive force is used for buffering vertical vibration force conducted by the force guiding piston, and therefore the damping effect is achieved.

The utility model relates to a variable magnetic damping system of a fishing reel, which comprises a swing arm, a supporting component used for bearing the swing arm, at least two first magnets with opposite polarities and an adjusting component capable of adjusting magnetic damping, and the head end of the swing arm is rotatably supported on the supporting component to enable the swing arm to be close to or far away from the wire wheel shaft. The wire winding device is characterized in that the adjusting component comprises a rotating component and a second magnet, wherein the rotating component can rotate relative to the supporting component, and the second magnet is arranged on the rotating component and can be matched with the first magnet; and the second magnet can approach to or be far away from the corresponding first magnet on the swing arm along with the rotation of the rotating component. Different magnetic damping effects are obtained through attraction or repulsion acting force generated by the second magnets on the first magnets at the corresponding positions of the swing arm, the overall structure is simple, adjustment is convenient, the number of brake gears is large, the swing arm does not need to be reset by means of a spring, and manufacturing is more convenient.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is remarkably improved.

The invention discloses an imaging type optical system for a high-intensity magnetic field Fourier infrared spectrum device, which comprises a solenoid superconducting magnet tubular sample cavity for the high-intensity magnetic field Fourier infrared spectrum device, and a non-magnetic damping sleeve arranged in the solenoid superconducting magnet tubular sample cavity, a non-magnetic mirror surface gold-plated optical waveguide is arranged at the upper part in the non-magnetic damping sleeve, a Faraday optical module is arranged at the lower part in the non-magnetic damping sleeve, and an adjustable sample bearing table and a low-temperature thermometer and magnetometer assembly are arranged below the non-magnetic mirror surface gold-plated optical waveguide; the non-magnetic mirror surface gold-plated optical waveguide comprises a light-in waveguide and a light-out waveguide, and the Faraday optical module integrates a switchable reflection module and a transmission module which are respectively adapted to different strong magnetic field Fourier infrared spectrum measurement requirements. The optical efficiency of the high-intensity magnetic field Fourier infrared spectrum device is improved, the problems of high optical loss and scattering interference of a traditional device are solved, and the signal-to-noise ratio is increased.

The invention discloses a bridge electromagnetic inertial mass hybrid control damping system and an overall hybrid control method. The damping system comprises an inertial mass assembly, an electromagnetic assembly, a rigidity assembly and a corresponding parameter adjusting circuit. Wherein the ball screw system is used for converting linear translation into rotation, the inertial mass assembly is used for providing acceleration type inertial mass damping, the electromagnetic assembly is used for providing speed type electromagnetic damping, and the rigidity assembly is used for providing rigidity. In a normal operation stage, a parameter adjusting circuit is utilized, and the purpose of adjusting electromagnetic damping and rigidity values is achieved by changing circuit input, so that semi-active tuning is realized; under the action of an earthquake, circuit input is fixed, so that parameters of the damper are constant, and the anti-seismic robustness of the damper can be improved.

The invention discloses a high-power stepless magnetic damping device and a power control method thereof.The high-power stepless magnetic damping device comprises a magnetic resistance magnetic core mechanism, the magnetic resistance magnetic core mechanism achieves control over high-power stepless magnetic damping according to the electromagnetic damping principle, regulation and control response is fast, continuity of constant-power output is guaranteed, and the high-power stepless magnetic damping device is suitable for large-power stepless magnetic damping. And a circle of Halbach magnet array formed by reinforcing magnets is arranged, so that the field intensity in the unit direction is enhanced, and the generation of high-power magnetic damping is realized. According to the power control method, a static Kalman data fusion updating model is introduced for power updating, speed and accuracy are balanced, a PWM signal is output through a PID controller to adjust the input current of a control coil, and therefore the size of a magnetic field is controlled, control over the size of magnetic damping is achieved, stepless regulation and control are achieved, and the control precision is improved. Therefore, stable output of constant power is ensured.

The utility model relates to the technical field of damping equipment, in particular to an electromagnetic damping device adopting a halbach permanent magnet array. The method is specifically applied to civil engineering building damping. Comprising a protective shell, and a spring unit, an electromagnetic damping unit and an inerter mass unit are arranged in the protective shell; the electromagnetic damping unit, the inerter mass unit and the spring unit are located on the left side and the right side of the protective shell respectively. According to the electromagnetic damping device adopting the halbach permanent magnet array, relative movement between the halbach permanent magnet array and a conductor is adopted to generate damping force, a mass flywheel and a spring are connected in combination with a gear rack, and mechanical energy is dissipated by generating huge inertial mass and utilizing reciprocating movement of the spring and generating eddy current damping force. According to the device, the spring unit, the inerter unit and the electromagnetic damping unit can operate together through vibration at any end, mechanical energy is consumed, and the purpose of damping is achieved.

The invention relates to the technical field of tungsten filament drawing processing, and provides a fuel gas heating ten-die wire drawing machine and a high-performance tungsten filament drawing process. The fuel gas heating ten-mold wire drawing machine comprises a rack and an electric controller, wherein a magnetic damping pay-off reel, a guide wheel, a natural gas fire grate, a wire drawing mold frame, a cone pulley and a servo wire take-up reel are sequentially arranged on the rack along a wire machining path; the natural gas fire grate comprises ten heating units, an electric proportional valve is arranged on the rack, and the electric proportional valve is in signal connection with an electric controller; a temperature measuring sensor is arranged above the heating unit, the temperature measuring sensor is in signal connection with the electrical controller, and the temperature measuring sensor is used for monitoring the temperature of the wire rod in real time; the high-performance tungsten filament drawing process comprises the following steps: S1, rough drawing; s2, medium drawing; s3, fine drawing; the step S1 is implemented by adopting the fuel gas heating ten-die wire drawing machine; through collaborative innovation of equipment and a process, the effects of improving the strength of the tungsten filament, improving the performance of the tungsten filament and reducing the wire breakage rate are achieved.

The utility model belongs to the technical field of vibration generators, and relates to a linear vibration motor and electronic equipment, the linear vibration motor comprises a housing, a vibrator assembly accommodated in the housing, and a stator assembly and an electromagnetic damping member which are fixedly connected with the housing and used for driving the vibrator assembly to vibrate; the magnetic circuit system comprises at least two pieces of side magnetic steel and at least one piece of center magnetic steel, the magnetizing directions of the two adjacent pieces of side magnetic steel are opposite and perpendicular to the vibration direction, the center magnetic steel is clamped between the two adjacent pieces of side magnetic steel, and the thickness of the center magnetic steel is smaller than that of the side magnetic steel in the first direction. The center of gravity of the central magnetic steel is closer to the electromagnetic damping piece than the center of gravity of the side magnetic steel, the magnetizing direction of the central magnetic steel is parallel to the vibration direction, and the polarities of the ends, close to each other, of the central magnetic steel and the two adjacent side magnetic steel are the same. The structure not only can improve the electromagnetic damping effect, but also can maintain the magnetic field intensity on one side of the coil.

The outer circumferential surface (18a) and the inner circumferential surface (18b) of a fixed magnet (18), which is attached to a body (12), comprise cylindrical surfaces each having a uniform diameter. The outer circumferential surface (34a) of a movable magnet (34), which constitutes a movable part (22), comprises a cylindrical surface having a uniform diameter. The inner circumferential surface (34b) of the movable magnet comprises a conical curved surface. The fixed magnet and the movable magnet are magnetized in the axial direction, and the axial polarity of the fixed magnet is the same as the axial polarity of the movable magnet.

The invention provides automatic assembling equipment for a sliding bearing in a magnetic damping guider, and the automatic assembling equipment comprises a guider loading mechanism which comprises an upper guider loading assembly and a lower guider loading assembly which are symmetrically arranged left and right; the bearing loading mechanism is arranged between the upper guider loading assembly and the lower guider loading assembly; the transfer mechanism is arranged at the output end of the bearing loading mechanism; the assembling mechanism is located at the output end of the transferring mechanism and comprises a rotating assembly, a stamping assembly, an output assembly and a removing assembly, and the stamping assembly, the output assembly and the removing assembly are sequentially arranged in the transmission direction of the rotating assembly. Therefore, one device can complete the assembly work of the upper guider and the bearing and the assembly work of the lower guider and the bearing at the same time.

The invention discloses a magnetic performance dynamic compensation method of a magnetic latching relay suitable for a wide temperature range environment, and relates to the field of magnetic performance dynamic compensation, and the method comprises the steps: obtaining the real-time temperature data and real-time load voltage data of the relay, outputting a basic driving energy parameter, and obtaining the real-time temperature data of the relay based on the real-time temperature data; constructing a three-dimensional rigidity potential energy curved surface dimension reduction solution equivalent rigidity coefficient, predicting mechanical collision kinetic energy at the moment that a movable contact is closed, generating a critical rebound energy threshold value, constructing an ideal convergence track meeting physical deceleration constraint, executing inverse dynamics solution, generating a composite step driving waveform instruction, and performing dynamic deformation on the composite step driving waveform instruction. A relay coil is driven by executing the composite step driving waveform instruction, the motion state vector of a movable iron core is calculated in real time through a flux linkage observer, mechanical rebound is recognized, active magnetic damping adjustment is triggered, the movable iron core is forcibly clamped in a magnetic maintaining balance area, a movable contact can be forcibly locked at a conduction position, and the magnetic field is controlled. And a false pull-in fault is thoroughly avoided.

The utility model provides a yaw electromagnetic damping device and a yaw system of a wind generating set, the yaw electromagnetic damping device comprises: an electromagnet arranged on one of a tower drum and a main frame; the magnetic matching piece is arranged on the other one of the tower drum and the main rack, and the electromagnet and the magnetic matching piece can form magnetic attraction and / or repulsion in a power-on state; the power supply device is electrically connected with the electromagnet and can provide current for the electromagnet; and the control device is in signal connection with the power supply device and can control the output current of the power supply device. According to the yaw electromagnetic damping device provided by the embodiment of the invention, hydraulic oil leakage and dust cannot be generated, and environmental protection is facilitated; the friction plate or the sliding pad does not need to be replaced in the life cycle of the unit, so that the workload of the maintenance personnel is reduced, and the operation and maintenance cost is reduced; damage to the large yaw gear ring and the yaw motor can be reduced, and consumption of spare parts of a unit is reduced.

The invention discloses a vibration measurement and control device of a frame type multilayer vibration isolation platform. The vibration measurement and control device comprises a device body part, a vibration isolation damping part, a quasi-zero stiffness coupling part, an upper functional assembly part, a flexible beam part, a vibration detection part and a control part. The multi-layer strong coupling link of vibration excitation, magnetic damping vibration isolation, the quasi-zero stiffness system, the rotating platform and elastic connection is realized on the same platform, so that the coupling transmission and modal interaction can be conveniently researched.

The utility model discloses a linear motor, which comprises a shell, a vibrator assembly and a stator assembly, the vibrator assembly comprises a mass block and a magnetic circuit assembly fixed with the mass block, the magnetic circuit assembly comprises at least two side magnets and at least two center magnets which are different in thickness and are positioned between the two adjacent side magnets, the side magnets and the center magnets are arranged in the first direction and the second direction respectively, the magnetizing directions of the two center magnets are opposite and parallel to the first direction, and the magnetizing directions of the two adjacent side magnets are opposite and parallel to the second direction. The stator assembly comprises a coil and a conductive damping piece, the coil and the conductive damping piece are distributed on the two sides of the magnetic circuit assembly and fixed to the shell, and the two driving edges of the coil correspond to the two adjacent edge magnets respectively. The magnetic field intensity of the coil side and the conductive damping piece side is increased, it is guaranteed that the stator assembly side has strong electromagnetic driving force, sufficient electromagnetic damping is provided for the conductive damping piece side, the descending time of the motor is effectively shortened, and the user experience feeling is improved.

The invention relates to the technical field of wind power generation control, and discloses a self-adaptive high-power-density permanent magnet motor control method and system, and the method comprises the steps: monitoring a motor current waveform zero crossing point time sequence in real time, and taking the occurrence frequency of a time sequence abnormal event as a recognition basis of a system stress state; when the stress state is identified, d-axis current is instantly injected to form flexible electromagnetic damping, q-axis current output is synchronously limited to reserve safety margin, a current distortion signal is converted from a control error to a system state messenger, response is carried out in a cooperative mode of combining flexible suppression and active protection, and the safety margin is reserved. The problems of overheating and mechanical fatigue accumulation caused by excessive compensation when a traditional control mode deals with disturbance are avoided, the control system obtains the irritability self-protection capacity, and the operation reliability of the wind generating set under the uncertain working condition is improved.

The invention discloses a magnetic pole rotating type electromagnetic damping shimmy damper for a nose landing gear of an aircraft, and belongs to the technical field of vibration control of landing gears of aircrafts. The shimmy damper comprises a first stator disc and a second stator disc which are symmetrically arranged, a rotor disc, a plurality of pairs of permanent magnetic poles, a rotating shaft, a top cover, a base and a bearing. The rotor disc is in interference fit with the rotating shaft through the central square hole, the magnetic poles are circumferentially, uniformly and fixedly arranged on two sides of the rotor disc, and the magnetizing directions of the adjacent magnetic poles are opposite. An adjustable air gap is reserved between the stator disc and the magnetic pole. During working, shimmy motion of the nose landing gear is converted into rotation of the rotating shaft through the transmission mechanism, the rotor disc and the magnetic poles are driven to rotate, the stator disc cuts magnetic induction lines to generate eddy currents, damping torque is formed, kinetic energy is converted into heat energy, and efficient shimmy reduction is achieved. External power supply is not needed, the structure is compact, the weight is light, the problems of abrasion and maintenance of a traditional friction or oil damper are solved, and the damper is particularly suitable for a modern aircraft landing gear system.

The application relates to the technical field of electromagnetic damping, and provides a novel eddy current electromagnetic damper which comprises a cylindrical shell conductor plate (formed by embedding a conductive plate and a magnetic conductive plate), a ring-shaped Halbach permanent magnet array (as a mover), two strip-shaped permanent magnets, a central shaft and an end cover. When the damper is impacted, the mover and the stator move relatively, the conductive plate generates an eddy current, and an eddy current resistance is formed. Meanwhile, repulsion between N poles between the two strip-shaped permanent magnets and the ring-shaped Halbach permanent magnet array generates repulsion force, pushes the ring-shaped Halbach permanent magnet array back to the middle position, and makes the damper reset rapidly. The damper has the advantages of simple structure, low cost and high reliability, and is suitable for large-scale popularization and application.

The invention discloses a high-frequency electromagnetic coupling type damping system and a control method thereof, and relates to the technical field of automobile suspension. A primary coil and a tuning capacitor form a kHz-level LC resonance circuit, a secondary coil or a conductive disc is coupled with the kHz-level LC resonance circuit in a spaced mode, and non-contact suspension supporting is formed between a vehicle body and wheels by means of permanent magnet preloading. The driving frequency is set to be 1-10% above the resonant frequency, the system naturally presents positive stiffness and realizes self-balance, and a sensor closed loop is not needed. Coupling change caused by road excitation induces current on the secondary side, energy can be recycled through the rectifier bridge-DC-DC converter, and electromagnetic damping can also be formed through the adjustable load.

The utility model discloses an electromagnetic damping vibration isolation device belongs to vibration control technical field. The utility model solves the technical problem of the magnetic field intensity fixed of electromagnetic damping vibration isolation device and coil heating easily leads to performance attenuation. The utility model discloses an electromagnetic damping vibration isolation device, including coil subassembly and conductor block. Coil subassembly includes coil and coil clamp. Coil clamp is held in the outer periphery of coil. Coil clamp includes clamp body and water cooling pipeline. The heat dissipation block is equipped on the clamp body, and the heat dissipation block extends along the radial direction of coil, and multiple heat dissipation blocks are evenly arranged around coil. The water cooling pipeline is surrounded in the clamp body. The conductor block is located between at least two groups of coil subassembly, and the magnetic pole of every two groups of coil subassembly is opposite, thereby making the conductor block can be subjected to electromagnetic damping force when producing vibration. The utility model discloses a vibration isolation device can cover the vibration control demand of multiple frequency bands, avoids coil overheat aging, improves the life of vibration isolation device.

The invention relates to the technical field of automatic assembly of inner sealing rings, in particular to automatic assembly equipment and method for inner sealing rings of magnetic damping guiders, and the equipment comprises a rack, and a sorting unit, a feeding unit, a deformation unit and an assembly unit which are mounted on the rack; the feeding unit transfers the sealing rings output by the sequencing unit one by one to the deformation unit, the deformation unit deforms the circular sealing rings into the state that the outer contours are smaller than the contours of the sealing rings in the natural state and transfers the sealing rings to the assembling unit, and the assembling unit transfers the upper guider and the lower guider to one side of the deformation unit and then conveys the sealing rings to the assembling unit. The deformation unit is matched to assemble the deformed sealing ring to the inner hole of the upper guider and the inner hole of the lower guider, the assembly unit is matched to achieve automatic assembly of the inner sealing ring, the production efficiency is high, the deformation quality of the sealing ring is stable, the assembly failure rate is low, and the problems that in the prior art, the assembly failure rate is high, and the production efficiency is low are solved.

The utility model discloses a servo tachometer unit structure with a magnetic damper, and belongs to the technical field of aviation brake structures. Comprising a stator assembly (1), a rotor assembly (2), a damper assembly (3), a damper iron core (4), a pin (5) and a bearing (6). When the servo tachometer unit works, the rotor assembly 2 runs at a high speed, the rotor assembly 2 belongs to a conductor in a magnetic field of the stator assembly, the conductor cuts magnetic induction lines and generates induction current when moving, and the induction current generates ampere force opposite to the original moving direction of the conductor in a magnetic field provided by the damper assembly 3. Deceleration and stable control of the conductor, namely the rotor assembly 2, are realized; when the servo tachometer unit works, the rotor assembly rotates at a high speed, the magnetic damper provides a reverse magnetic field for the rotor assembly, deceleration and stable control over the rotor assembly are achieved, and the servo tachometer unit stops rotating quickly during high-speed work and works more efficiently.

The swimming pool ladder with the slow descending function comprises a main body frame, floating body pedals, a lifting device, a metal flat plate and a magnetic damping magnet block, the lifting device comprises four groups of pulley assemblies and rope bodies connected end to end, and the rope bodies sequentially penetrate through a first lower pulley, an upper pulley and a second lower pulley in the same group. The floating body pedal penetrates through the pulleys and the rope bodies in the same mode to form an arrangement with four inner vertical ropes and four outer vertical ropes, the floating body pedal is fixedly connected with the four inner vertical ropes through the connecting body, the connecting body is provided with a flat plate channel for the metal flat plate to penetrate through, and magnetic damping magnet blocks are installed on the two sides of the flat plate channel. And the metal flat plate is fixed in the main body frame and penetrates through the flat plate channel of the connecting body. The swimming pool ladder is simple in structure, free of additional driving devices, easy and convenient to use and operate, smooth and stable in the descending process and suitable for being installed and used in most swimming pools.

This application relates to a variable pitch controllable magnetic damping oscillating propeller clamp device, including a propeller clamp assembly, a motor assembly, and propeller blades. The propeller clamp assembly includes a propeller clamp seat assembly and an oscillating arm assembly. The oscillating arm assembly includes an inverted U-shaped oscillating arm and two propeller blade mounting seats. An axial connection assembly is provided between the propeller blade mounting seats and the two ends of the inverted U-shaped oscillating arm. A rotation limiting assembly is provided between the two ends of the inverted U-shaped oscillating arm and one end of the axial connection assembly. An electromagnet assembly is provided on the propeller clamp seat assembly, and permanent magnets adapted to the two end faces of the electromagnet assembly are provided at the two ends of the inverted U-shaped oscillating arm. This invention belongs to the field of unmanned aerial vehicle (UAV) technology. It achieves precise adjustment and locking of the propeller blade pitch angle through a gear disk and a limiting mechanism, adapting to different flight requirements and improving control performance. The damping force is directly generated by the magnetic repulsion between the electromagnet and the permanent magnet, without the need for additional mechanical parts, resulting in fast response and more direct damping effect.

The application provides a damping foot pad, a compressor and a refrigeration and heating device. The damping foot pad comprises a shell with an inner cavity, a shaft core, a sheet spring, an eddy current damping mechanism for damping axial vibration of the shaft core, and a magnetic damping mechanism; the magnetic damping mechanism comprises an inner magnetic ring and an outer magnetic ring for generating magnetic repulsion to the inner magnetic ring in the direction of the shaft core. The damping foot pad of the application damps the axial vibration of the shaft core by setting the eddy current damping mechanism, sets the inner magnetic ring on the shaft core, and sets the outer magnetic ring coaxially around the inner magnetic ring. Since the eddy current damping mechanism and the magnetic damping mechanism have very small stiffness close to zero at the start of vibration, quasi-zero stiffness damping is formed, the axial and radial vibration isolation frequency ranges of the damping foot pad are wide, good axial and radial vibration isolation can be achieved, and the vibration isolation effect is good.

The invention belongs to the field of torsional vibration dampers, and particularly relates to a composite torsional vibration damping device. Comprising a first rotating part and a second rotating part; the first rotating part comprises a mass block and a vibration reduction body; the vibration reduction body is nested in the mass block, the vibration reduction body and the mass block are coaxial, and the circumferences of the vibration reduction body and the mass block are connected through uniformly distributed piezoelectric reeds; permanent magnets are arranged on the mass block by taking the axis of the vibration reduction body as a center array; the second rotating part comprises an annular electromagnetic coil, the annular electromagnetic coil and the vibration reduction body are coaxial, and the annular electromagnetic coil and the permanent magnet coincide in the space; a torque input connecting part is arranged on the axis of the damping body, and a torque output connecting part is arranged on the second rotating part; the active rigidity adjusting function of a piezoelectric material is combined with the real-time controllability of electromagnetic damping, and efficient vibration reduction under the dynamic working condition is achieved through mechanical structure optimization. Piezoelectric-electromagnetic cooperative control and structure integration optimization are achieved, the structure is simple, and the design is novel and reasonable.

The application discloses a double-coil structure electromagnetic damping nonlinear vibration isolator, which comprises a rigid structure and a damping structure matched with each other; the damping structure comprises a top cover, a first left limiting part, a first right limiting part, a first magnetic material, a first coil, a second right limiting part, a base, a second coil, a second left limiting part, a second magnetic material, a base connecting shaft and a part connecting shaft; the first left limiting part, the second left limiting part, the first right limiting part and the second right limiting part are arranged on the base. The nonlinear electromagnetic vibration isolator has the characteristics of damping nonlinearity, adjustable damping and function conversion, and the reliability problem of the ordinary nonlinear vibration isolator under the working condition of low-frequency large amplitude vibration is solved through the damping end, so that the vibration isolator has a better vibration isolation effect under the low-frequency working condition.

The utility model relates to the technical field of anti-vibration, and discloses a high-damping anti-vibration seat of integrated circuit equipment, which comprises an anti-vibration seat and a base. According to the high-damping anti-vibration seat of the integrated circuit equipment, through the arrangement of the supporting seat, the base, the damping mechanism and the elastic mechanism, when the integrated circuit equipment is vibrated, the acting force borne by the supporting seat can be transmitted to the piston rod, the piston rod is forced to vibrate, and magnetorheological fluid is pushed to flow in the annular cavity; a magnetic field generated by the permanent magnet array enables magnetorheological fluid particles to form a chain-shaped structure, fluid shear stress is greatly increased, nonlinear viscous resistance is generated, meanwhile, vertical reciprocating motion of the piston rod cuts magnetic induction lines of the permanent magnet array, an eddy current effect is triggered, reverse electromagnetic damping force is generated, and the damping effect is improved. Therefore, magnetic circuit cutting and fluid extrusion are achieved while movement of the piston rod is achieved, a composite energy dissipation mechanism of electromagnetic damping and viscous damping is formed, and the energy dissipation efficiency and the resonance peak suppression efficiency are remarkably improved.

The invention discloses a heat distribution pipeline vibration response analysis and vibration reduction control method along with bridge laying, and the method comprises the following steps: S1, building a pipeline vibration analysis model containing fluid flow, external excitation and a thermal expansion effect based on an energy finite element method, and calculating the energy density distribution and energy flow distribution of a pipeline; s2, on the basis of the energy density distribution and the energy flow distribution, identifying damaged and weak parts of the pipeline through predefined damage indexes; s3, designing at least one magnetic damping dynamic vibration absorber based on a fixed-point theory, and determining the mounting position of the magnetic damping dynamic vibration absorber along the pipeline through a multi-objective optimization algorithm; s4, performing thermal stress coupling analysis on the pipeline system added with the magnetic damping dynamic vibration absorber; and S5, the vibration reduction effect is verified through finite element simulation and field tests. Through the pipeline vibration analysis model established based on the energy finite element method, the energy density and the energy flow distribution of the pipeline in the axial direction are accurately calculated, and the propagation path and the concentration area of vibration energy are revealed.