324 results about "Electromagnetic vibration" patented technology

The invention discloses a variable air gap domain-based permanent magnet motor topology hierarchy optimization design method and a motor, and the method comprises the steps: firstly determining an electromagnetic performance layer optimization target, constructing a geometric parameter model, carrying out the dimensionality reduction of a high-dimensional parameter, and constructing a first hierarchy optimization sub-model I; performing geometric parameter optimization on the stator and rotor basic domain by combining a multi-objective optimization algorithm to obtain an optimized motor I; analyzing and optimizing the characteristic electromagnetic force of the motor I under different working conditions to serve as a second-level optimization target, constructing a second-level optimization sub-model II, performing small-scale online topological optimization in combination with a multi-target genetic algorithm, performing secondary design on a motor air gap design domain, obtaining a sample data set, constructing a parallel agent model, and constructing a second-level optimization sub-model II; then large-scale off-line topological optimization is carried out, and remodeling of a motor air gap design domain is achieved; and performing simulation evaluation on the final optimized motor. According to the method, on the premise that the vehicle permanent magnet driving electromagnetic performance is kept, electromagnetic vibration noise under multiple working conditions is suppressed, and meanwhile optimization efficiency is remarkably improved.

The invention relates to an AI server cooling water pump vibration quantity self-adaptive calibration test method and system, an intelligent test platform integrates a six-dimensional force sensor and a temperature compensation vibration exciter, the platform rigidity is automatically calibrated, a water pump-pipeline system transfer function is obtained, and a rotating speed-lift-modal frequency three-dimensional mathematical model is established; a three-axis MEMS accelerometer array is arranged at sensitive parts such as a water pump bearing seat and a motor shell, and vibration, current and pressure signals are synchronously collected; carrying out time-frequency domain signal processing by adopting variational mode decomposition in combination with self-adaptive S transformation, and extracting a 128-dimensional full-frequency domain feature vector containing a modulation side frequency band; effective values of vibration acceleration, speed and displacement are calculated through a frequency domain integration algorithm, and current harmonic interference is corrected through an electromagnetic vibration compensation model; and finally, a vibration health degree evaluation model containing 18 characteristic parameters is established based on a support vector machine, the test system comprises an intelligent test platform unit, a multi-source sensing unit, an edge calculation unit and a data management unit, and microsecond-level synchronous acquisition and GB-level data throughput are realized through a time sensitive network. And online incremental learning and automatic generation of a test report are supported. The method has the effect of improving the water pump vibration quantity test precision.

The invention provides a rotor iron core, a permanent magnet motor and an inverter compressor, and relates to the technical field of motor and compressor design and manufacture, the rotor iron core comprises uniformly distributed permanent magnet grooves, a groove is arranged between two adjacent permanent magnet grooves, each groove extends inwards along the radial direction of the rotor iron core, parallel magnetic bridges are arranged between the grooves and the permanent magnet grooves, and the permanent magnet grooves are connected with the parallel magnetic bridges. A first magnetic barrier groove, a second magnetic barrier groove and a third magnetic barrier groove which are symmetrically distributed are formed in the two sides of the top of each permanent magnet groove respectively, a first arc and a second arc are arranged on the outer side of the rotor core above the magnetic barrier grooves, the second arc intersects with the side edge of the groove, and permanent magnets with alternating magnetism are embedded in the permanent magnet grooves. The radius Rr of the outer side of the rotor iron core, the distance ho from the middle point of the bottom of the permanent magnet groove to the center point of the rotor iron core and the thickness hm of the permanent magnet meet the condition that (Rr-ho) / hm is larger than 2 and smaller than or equal to 3.4. By reasonably arranging the position and the size of the magnetic barrier groove, magnetic circuit distribution can be changed, magnetic flux leakage can be reduced, the power density of the motor can be increased, and electromagnetic vibration noise of the motor and the compressor can be reduced.

The invention discloses a high-speed motorized spindle integrating an electromagnetic actuator and a magnetofluid bearing and a using method. The high-speed motorized spindle comprises a spindle body, and a spindle body of the spindle body is supported through the arranged magnetofluid bearing; an electromagnetic actuator system used for detecting and controlling fluttering of the main shaft is arranged at the end of the main shaft and comprises a displacement detection mechanism used for detecting fluttering displacement of the main shaft and an electromagnetic vibration suppression mechanism used for applying electromagnetic force to suppress fluttering of the main shaft according to the detection result of the displacement detection mechanism. According to the magnetofluid bearing, stable and high-rigidity support is provided for a shaft by using a magnetofluid medium and utilizing the characteristic that the viscosity of the magnetofluid can be changed under an external magnetic field; and meanwhile, the electromagnetic actuator actively controls vibration generated in the machining process through accurate magnetic field control, and the stability of the main shaft in the machining process can be effectively improved. Through the combination of the two, the overall stability and the dynamic response capability of the system are remarkably improved.

The utility model provides an electromagnetic electro-hydraulic composite vibration device which comprises a cylinder body, a magnetic cylinder ring arranged on the side edge of the cylinder body in the axial direction and a piston penetrating through the cylinder body in the axial direction, an excitation piece is arranged in the magnetic cylinder ring, a driving coil is arranged on the piston, and the excitation piece is connected with the driving coil. The middle of the piston protrudes outwards in the axial direction to form a stress protrusion, the stress protrusion abuts against the cylinder body in the radial direction, the driving coil is used for being matched with an excitation piece to drive the piston to move in the axial direction, and the cylinder body is hollow to form an upper hydraulic cavity and a lower hydraulic cavity which are located on the two sides of the stress protrusion. The cylinder body is provided with a first hydraulic runner and a second hydraulic runner which are used for being communicated with the upper hydraulic cavity and the lower hydraulic cavity respectively. According to the electromagnetic electro-hydraulic composite vibration device and the vibration table, electromagnetic vibration and electro-hydraulic vibration can be achieved on one vibration table, the bandwidth coverage is wide, and compared with two sets of equipment which operate independently, the cost is lower, and the occupied area is smaller.

The invention discloses an electromagnetic vibration table multi-mode self-adaptive guiding system which comprises a vibration table body, an intelligent guiding adjusting system, a multi-sensor fusion framework and a reset control module, and the intelligent guiding adjusting system, the multi-sensor fusion framework and the reset control module are arranged in the vibration table body. The intelligent guiding adjusting system comprises an adjusting assembly and a harmonic wave speed reducing motor set, the output end of the harmonic wave speed reducing motor set is connected with the adjusting assembly, the harmonic wave speed reducing motor set is electrically connected with the reset control module, and the adjusting assembly is connected with the moving coil; the multi-sensor fusion framework comprises an MEMS gyroscope, a laser displacement sensor and a six-dimensional force sensor, the MEMS gyroscope is located in the moving coil, the laser displacement sensor is located outside the moving coil, and the six-dimensional force sensor is located at the top of the moving coil. The vibration waveform fidelity is improved to 98% or above, and the method is suitable for high-end test scenes such as spacecraft assemblies (10-2000 Hz) and new energy automobile battery packs (20-500 Hz).

The multi-directional controllable suspension system comprises a linear electromagnetic vibration reduction assembly and an arc-surface electromagnetic vibration reduction assembly, when the multi-directional controllable suspension system is used, when a vehicle frame at the lower end vibrates vertically, a first guide rod moves in the axial direction of an outer cylinder, and a cylindrical electromagnetic coupling unit fixed to the first guide rod moves between an outer permanent magnet array and an inner permanent magnet array; when the vehicle body inclines laterally or twists, the outer cylinder rotates around the hinged point of the outer cylinder and the lower end vehicle frame, the cambered surface electromagnetic coupling unit is driven to deflect between the upper permanent magnet array and the lower permanent magnet array, the gradient magnetic field is cut to generate resistance moment, and vibration is reduced. The first elastic piece and the second elastic piece provide elastic restoring force for the upper permanent magnet array and the lower permanent magnet array correspondingly to cooperatively inhibit side inclination and torsion, so that multi-dimensional vibration reduction in the horizontal direction is achieved, and the dynamic stability of the vehicle is improved.

The invention discloses a rapid calculation method for electromagnetic vibration of a permanent magnet synchronous motor, and belongs to the technical field of electromagnetic field calculation. According to the method, a magnetic potential and magnetic conductance method is innovatively combined with an improved sub-domain method, the problem of complexity of electromagnetic field distribution of a nonlinear material is effectively solved through the magnetic potential and magnetic conductance method, and the capture precision of electromagnetic field changes is remarkably improved by dividing a computational domain into a plurality of sub-domains through the improved sub-domain method. According to the method, the influence of the tangential electromagnetic force wave and the harmonic current is fully considered, and high-precision calculation of the electromagnetic force can be realized. On the basis, a stator core shell equivalent theoretical model is established, the inherent frequency of the stator is calculated by adopting an energy method, and the accuracy of the model is verified through a modal experiment. Furthermore, by determining the frequency response function of the stator in the low-order mode, the acceleration spectrum and electromagnetic force wave distribution of the prototype stator in each mode are obtained based on the linear superposition principle. Compared with a traditional electromagnetic-structure coupling finite element model, the method has the advantages that the calculation efficiency is remarkably improved while the calculation precision is guaranteed, the calculation time is shortened by 59.3%, and efficient and reliable technical support is provided for optimization design of electromagnetic equipment.

The invention discloses a prebaked anode production material conveyor and a control method, and relates to the technical field of prebaked anode production, the prebaked anode production material conveyor comprises a conveyor main body, and the conveyor main body comprises an inner-layer conveying pipe and an outer-layer cooling jacketed pipe coaxially arranged outside the inner-layer conveying pipe; an electromagnetic vibration exciter; the electromagnetic vibration exciter is arranged below the conveyor body and fixedly connected with the inner-layer conveying pipe through a rigid connecting piece, and the feeding module and the discharging module are located at the starting end and the tail end of the conveyor body respectively. The material characteristic identification sensor group is arranged in the feeding module; and the central control system is electrically connected with the material characteristic identification sensor group and the electromagnetic vibration exciter. Safety and environmental protection are guaranteed through a full-sealing structure and an active heat dissipation technology, efficient and general conveying of multi-form materials is achieved through material recognition and self-adaptive vibration control, and continuity and reliability of production are guaranteed in combination with an online self-cleaning system.

The invention discloses an electromagnetic vibration table for an uncooled infrared machine core assembly adopting multiple sensors, and relates to the technical field of vibration tables. By arranging four groups of vibration testing mechanisms of low frequency, intermediate frequency, high frequency and ultrahigh frequency, vibration waves of different frequencies can be synchronously or alternately generated, complex operation conditions of the uncooled infrared movement in real environments such as transportation jolting, mechanical shock and high-frequency vibration can be simulated, and vibration testing of different vibration frequencies can be performed on a plurality of uncooled infrared movement assemblies at the same time. Wherein the low-frequency vibration testing mechanism and the intermediate-frequency vibration testing mechanism can simulate low-frequency vibration in a transportation process, the high-frequency vibration testing mechanism can simulate high-frequency noise interference in operation of the uncooled infrared movement, and the ultrahigh-frequency vibration testing mechanism can simulate an instantaneous impact working condition of the uncooled infrared movement in an extreme environment. Therefore, each uncooled infrared movement to be tested can undergo vibration tests in various modes, full-band coverage tests are realized, and the accuracy and credibility of test results are greatly improved.

The invention discloses a process for preparing a high-strength aluminum alloy profile through gradient cooling die-electromagnetic vibration combined extrusion, and belongs to the technical field of aluminum alloy machining. According to the technology, the uniform fine grain structure and high performance of the aluminum alloy profile are achieved through the design of the length of a die working tape and the flow gradient of a cooling channel in cooperation with an electromagnetic vibration device. After a blank is subjected to homogenization treatment, the blank is extruded through a gradient cooling die, a thin-wall area working zone is 20-25 mm, the cooling water flow is 15-20 L / min, a thick-wall area working zone is 10-15 mm, the cooling water flow is 5-10 L / min, 20-50 Hz electromagnetic vibration is applied at the same time, water mist quenching and aging treatment are conducted immediately after extrusion, zinc ions serve as heterogeneous nucleation cores to promote generation of new crystal grains, ferrocene sulfenyl is adsorbed to the surfaces of the crystal grains to inhibit growth, and the thickness of the crystal grains is 10-15 mm. The average grain size is refined, and the effect is improved.

The invention relates to the technical field of steel member detection, and discloses a steel member bearing test and anticorrosive coating adhesive force detection table which comprises a workbench, a positioning clamping assembly is arranged in the middle of the top side of the workbench, a horizontal adjusting assembly is arranged at the bottom of the workbench, and pushing assemblies are arranged at the left ends of the front side and the rear side of the top of the workbench. A bearing loading mechanism is arranged in the middle of the upper end of the pushing assembly, and an auxiliary assembly is arranged at the right end of the top of the workbench. Through the integrated design of the detection table, the integrated operation of the bearing test of the steel member and the adhesive force detection of the anticorrosive coating is realized, and the detection efficiency is greatly improved; in the load-bearing loading mechanism, a hydraulic cylinder I and an integrated electromagnetic vibrator work cooperatively, static load can be provided, dynamic vibration can be superposed, load data can be monitored in real time in combination with a pressure sensor, the stress state of the steel member under complex working conditions can be accurately simulated, and diversified load-bearing test requirements are met.

The invention discloses a permanent magnet synchronous motor zero-order radial force analysis modeling method based on lumped parameters, and belongs to the technical field of motor electromagnetic vibration noise analysis. According to the method, the flux linkage is taken as a key correlation variable, and the relationship between the air gap flux density distribution and the current is revealed by reasonably selecting lumped parameters. The relationship between current and flux linkage is established by using incremental inductance, permanent magnet flux linkage and armature flux linkage are separated by using apparent inductance, and the influence of flux leakage on air gap armature flux linkage is analyzed by using stator leakage inductance. According to a winding structure, an air gap flux density distribution basic waveform is established, and the armature air gap flux density distribution characteristic is further refined by analyzing the influence of a stator structure and a magnetic bridge. In addition to traditional lumped parameters, new lumped parameters are also defined for establishing an analytical model. Compared with a finite element model in the prior art, the analytical model disclosed by the invention has higher precision, and can intuitively express the relationship among the current, the lumped parameter and the zero-order radial electromagnetic force.

The invention discloses a multi-station automatic seed vigor modeling and efficient sorting system of a disc structure, which comprises a rotating base disc, and three stations are arranged on the rotating base disc and are respectively a feeding station, a detection station and a sorting station; wherein a feeding mechanism is arranged at the feeding station; a multi-channel spectrum detection unit is arranged at the detection station; and the transfer mechanism and the classified collection box are arranged at the sorting station. According to the multi-station seed vigor detection device, the problem that traditional seed vigor detection equipment is low in efficiency is solved, synchronous feeding, detection and suction of a large number of seeds are achieved through the multi-station design on the rotating base disc, the seed detection speed is greatly increased, and the requirement that the seed production scale is continuously enlarged in the agricultural modernization process can be better met. And secondly, the vacuum suction device, the electromagnetic vibration device and the array aperture disc are matched for use, so that array type single-grain distribution of the seeds can be realized, and a foundation is laid for subsequent accurate detection and sorting.

The invention relates to the technical field of submersible pump testing, and discloses a permanent magnet variable frequency submersible pump testing method and system. The method comprises the following steps: acquiring an original response signal cluster of the submersible pump in multi-stage variable-speed operation by constructing an integrated test environment; decoupling and enhancing the signal cluster based on time sequence dependence, and separating out an independent hydraulic performance characteristic signal group and an independent electromagnetic vibration characteristic signal group; and inputting the characteristic signal group into a dynamic working condition simulator, and restoring an internal flow field pressure cloud picture and a rotor stress distribution picture of the submersible pump under the simulated working condition through an iterative approximation algorithm. The two are fused to deduce a potential failure mode and its evolution trajectory, and an enhanced test procedure is generated accordingly. According to the method, accurate separation of multi-physics field test signals and visualization of internal states are realized, and the accuracy of fault attribution and the advance of failure prediction are improved.

The invention discloses a multi-angle fixing tool for a vibration detection platform, and belongs to the technical field of electromagnetic vibration test benches. The device mainly comprises a vibrating body; a movable plate is mounted at the top of the workbench in a sliding manner; the fixing device comprises a bottom plate, a plurality of sets of sliding blocks are installed at the bottom of the bottom plate, and a plurality of sets of clamps are arranged at the top of the bottom plate; the testing device comprises a bearing plate, and two groups of first slideways are arranged at the top of the bearing plate; the position of the supporting assembly corresponds to the position of the bottom plate; the connecting assembly is suitable for connecting the bearing plate with the moving plate; a turning assembly; a roll assembly. According to the multi-angle fixing tool for the vibration detection platform, by arranging the turning simulation assembly, the roll simulation assembly and the conventional simulation assembly, flexible simulation can be carried out according to different road conditions and driving states, and powerful support is provided for quality detection and performance evaluation of automobile parts.

The invention relates to the technical field of transformers, in particular to a voltage regulating transformer which comprises a machine shell, a cover plate and a voltage transformation device, two transverse plates are arranged at the bottom of the voltage transformation device, grooves are formed in the bottoms of the two transverse plates, and clamping seats movably connected with the two grooves are movably arranged in the machine shell. According to the voltage regulating transformer, the L-shaped rods, the extrusion plates and the grooves of the transverse plates are dynamically matched, and the L-shaped rods and the extrusion plates are cooperatively operated with the shaking adjusting mechanisms, so that the voltage regulating transformer has the advantages that the voltage regulating effect of the voltage regulating transformer is improved, and the voltage regulating transformer is convenient to use and high in practicability. A multi-stage buffer system is constructed between the transformer core element and the shell, in the aspect of vibration isolation, when electromagnetic vibration is transmitted to the fixed inclined block through the clamping base and the movable inclined block, vertical vibration is converted into horizontal displacement through the inclined plane structure, and external mechanical impact can be effectively attenuated through spring damping.

The invention relates to the technical field of masonry construction, and discloses a construction method for improving masonry quality and progress, which comprises the following steps: step 1, scanning a construction area by adopting a multi-beam ground penetrating radar, marking a foundation cavity and grouting and reinforcing, step 2, paving a mortar belt with a trapezoidal section through a movable mortar paving vehicle integrated with an electromagnetic vibration module, and step 3, paving a mortar belt with a trapezoidal section through a movable mortar paving vehicle integrated with an electromagnetic vibration module. The method comprises the following steps: step 1, carrying out three-way positioning correction on a prefabricated building block by using a pneumatic leveling device, step 4, moving and heating along a mortar joint by using a 2.45 GHz microwave curing instrument, and triggering secondary leveling of mortar, and step 5, integrating construction data based on a BIM platform and generating a quality label bound by space-time coordinates. Foundation holes are accurately positioned through gridding scanning of the multi-beam ground penetrating radar, a construction coordinate system is established in combination with a Beidou positioning system, the pneumatic leveling device adopts a three-axis tilt angle sensor and a displacement feedback system, the flatness and perpendicularity of masonry installation are ensured, construction errors are reduced from the source, and the structural stability is improved.

The invention discloses a friction stir welding and additive preparation method for an aluminum steel dissimilar material and application of the friction stir welding and additive preparation method. The friction stir welding and additive preparation method comprises the following steps that S1, an aluminum alloy material and a stainless steel material are preheated; s2, under the condition that electromagnetic vibration and ultrasonic vibration are applied, an aluminum alloy material and a stainless steel material are subjected to material adding through a stirring friction material adding technology, and an aluminum-steel dissimilar material is obtained; and S3, the aluminum steel dissimilar material is heated to 200-500 DEG C through pulse current, then cooled to-196--100 DEG C, subjected to cold insulation, then heated to 200-400 DEG C through high-frequency pulse current, and subjected to heat preservation. According to the friction stir welding and additive preparation method for the aluminum steel dissimilar material, the forming precision, the strength, the corrosion resistance and the production efficiency of the prepared aluminum steel dissimilar material are all remarkably improved.

The invention discloses a sensorless control method and system for a synchronous reluctance motor with mixed signal injection, and the method comprises the steps: injecting a high-frequency mixed voltage signal at a d axis of an observation shaft system, the high-frequency mixed voltage signal is constructed through the mathematical change of four sine waves, and the integral of the injection voltage in a period is 0; performing dq / alpha beta conversion on the observation shaft system voltage injected with the high-frequency mixed voltage signal, and applying the voltage to the A, B and C three-phase winding voltage of the motor; the three-phase current of the motor is sampled, and the d-q axis high-frequency current of the observation shaft system is obtained through coordinate transformation; and decoupling processing is carried out on the obtained high-frequency current, and estimation of the position of the motor rotor is realized based on a phase-locked loop. The high-frequency mixed voltage signal can generate a lower high-frequency current fundamental wave characteristic, which has a remarkable effect on suppression of high-frequency torque and electromagnetic vibration when the motor runs.

The invention discloses an industrial internet data acquisition system which comprises a data acquisition terminal, a multi-protocol adaptive conversion module, a real-time data processing engine, a distributed redundancy storage module, a data transmission module, a central control module, a modular expansion interface, an anti-interference optimization module and a power management module. According to the invention, the anti-interference optimization module and the anti-interference design of each module effectively reduce the influence of electromagnetic, vibration, temperature and other interferences on the system in the industrial environment, so that the system can stably operate in the complex industrial environment, the data acquisition is more accurate and reliable, and the system is more suitable for the actual industrial use scene; the distributed redundancy storage module adopts a multi-node storage architecture to ensure redundancy storage of data, and data transmission adopts a 5G + wired dual-transmission mode, so that the reliability of data transmission and storage is improved, and the risk of data loss and errors is reduced.

The invention discloses an all-dimensional spraying vibration grouting sample preparation device based on MICP reinforced sandy soil. The device is composed of an all-dimensional spraying system, a grouting auxiliary system and a vibration system. The omni-directional spraying system comprises a conveying pump, a liquid distribution box, a regulation and control nozzle and a liquid storage bin; the grouting auxiliary system comprises an intelligent program control board, a circuit integrated carrier cover, a circular box body, a square base, a net-shaped thin-wall sample loading barrel, an annular drainage table and a waste liquid flow guide pipe; the vibration system comprises a miniature variable-frequency electromagnetic vibration motor and a buffer assembly table. In the process of biologically mineralizing sandy soil, the sandy soil is filled into the net-shaped thin-wall sample loading barrel, the circuit integrated carrier cover is closed, the omnibearing spraying system and the vibration system are accurately controlled through the intelligent program control panel, and the cementing liquid and the bacterial liquid are uniformly permeated among sand particles. The problem of uneven deposition of calcium carbonate in the MICP microbial mineralization process can be effectively solved, so that the mineralization efficiency and quality are improved.

The present invention belongs to the technical field of tunnel seismic testing, and specifically relates to a tunnel seismic simulation testing device and a testing method. The tunnel seismic simulation testing device includes a base, on the top of which an electromagnetic vibration table is fixedly installed, and connecting plates are connected to both sides of the top of the electromagnetic vibration table; lifting components are installed at the four corners of the top of the electromagnetic vibration table, and a pressing component is arranged among the four lifting components; the pressing component includes a frame body and a nylon cloth bag, and the nylon cloth bag is fixed to the bottom of the frame body. Through the lifting components, the present invention can drive the pressing component to descend, so that the bottom of the nylon cloth bag can wrap around the surface of the tunnel model, and then crushed stone particles are filled into the cloth bag, thereby using the crushed stones evenly distributed along the outer wall of the tunnel model in the cloth bag to press the tunnel, which is beneficial to improving the uniformity of the pressure on the tunnel surface during the vibration test, and further beneficial to improving the accuracy of the test.

The utility model provides an electromagnetic vibration type slimming machine which comprises a lower bottom plate, a first upper cover shell and a second upper cover shell, the first upper cover shell and the second upper cover shell can move in the vertical direction relative to the lower bottom plate, and the first upper cover shell and the second upper cover shell are arranged adjacently. A first electromagnetic vibration assembly is installed between the first upper cover shell and the lower bottom plate, and a second electromagnetic vibration assembly is installed between the second upper cover shell and the lower bottom plate. Each of the first electromagnetic vibration assembly and the second electromagnetic vibration assembly comprises an electromagnetic coil fixedly connected with the lower bottom plate and a magnetic conductive seat fixedly connected with the corresponding upper housing, and an annular magnetic gap with an opening in the lower end is formed in each magnetic conductive seat; the electromagnetic coil is located on the lower side of the magnetic conductive base, and the upper end of the electromagnetic coil is arranged in the annular magnetic gap. The electromagnetic vibration type slimming machine overcomes the defects that an existing slimming machine is of a mechanical vibration structure, so that the amplitude cannot be adjusted, and impact on a human body is large.

The invention relates to the technical field of material iron removal, and discloses dry powder electromagnetic vibration iron removal equipment which solves the technical problem that in the prior art, time control is not accurate in the customized closing and residue discharging operation procedure, and the dry powder electromagnetic vibration iron removal equipment comprises a rack, a machine body, a coil, a material selecting cavity, a medium assembly and a vibration motor; a magnetic material outlet pipe and a material outlet pipe are arranged at the bottom end of the sorting cavity, a material distributing valve is arranged at the joint of the magnetic material outlet pipe and the material outlet pipe, and the material distributing valve is used for controlling the material discharging direction of the sorting cavity to select the material discharging direction of the magnetic material outlet pipe or select the material discharging direction of the material outlet pipe; a weighing sensor is mounted at the bottom of the machine body; and a controller is mounted outside the machine body, is in communication connection with the weighing sensor, and is used for controlling the coil to be powered off. According to the technical scheme, through the arrangement of the weighing sensor and the controller, predictive control over the residue discharging operation procedure is achieved, and the good automatic control effect is achieved.

The invention discloses coal quality detection equipment and a detection method, which are suitable for an air powder pipeline system with a sampling extension pipe. The equipment adopts a modular structural design, and a multi-channel sampling assembly, a cyclone separation unit, a vibration feeding mechanism, a weighing detection module, a burning analysis device and an automatic transfer mechanical arm are integrated in a cabinet body. Synchronous sampling of multiple pipelines is realized through the detachable sampling pipe group, and gas-solid separation is completed by matching with the independent cyclone separation cylinder; the innovatively-designed electromagnetic vibration feeder adopts an alternating magnetic field to drive a permanent magnet vibration structure, and accurate feeding of pulverized coal is achieved in cooperation with variable frequency speed regulation; the weighing device and the burning detection device establish a closed-loop detection process through a mechanical arm, and full-process detection of pulverized coal sampling, separation, weighing, burning and residue weighing can be automatically completed. The equipment realizes coal quality on-line detection automation, obviously improves the detection efficiency and precision, and is suitable for coal quality real-time monitoring requirements of industrial scenes such as thermal power generation and the like.

The utility model relates to power supply engineering technical field discloses a power supply system installation engineering pipeline structure, including lower half pipeline, one side of lower half pipeline is hinged with upper half pipeline through hinge, upper half pipeline forms the closed cylindrical pipeline structure with lower half pipeline, and the inside of lower half pipeline and upper half pipeline is provided with damping spring. This power supply system installation engineering pipeline structure, through setting damping spring, support backing plate and shock absorbing rubber pad, can effectively buffer and absorb the electromagnetic vibration that cable produces in the operation process because of the current change, when cable vibrates, the vibration is transmitted to shock absorbing rubber pad first, and shock absorbing rubber pad absorbs part of energy initially, then through support backing plate, the rest vibration is transmitted to damping spring, and damping spring further buffers the vibration, reduces the damage of vibration to pipeline and cable, prolongs the service life of cable and pipeline, reduces the noise produced because of vibration simultaneously.

This utility model discloses an active electromagnetic vibration damping device for a portable oxygen concentrator compressor, including a housing. A connecting wire is inserted into a clamping block, and the other end of the connecting wire is electrically connected to a control system. A permanent magnet is fixedly connected to the middle of the upper end of the compressor, and a vibration displacement sensor is installed on one side of the upper end of the compressor. One end of the vibration displacement sensor is electrically connected to the control system, and the control system is electrically connected to a PLC controller. This portable oxygen concentrator compressor active electromagnetic vibration damping device can form a closed-loop magnetic field area with the permanent magnet through three sets of distributed electromagnetic coils. Vibration displacement can be detected by the vibration displacement sensor, allowing for real-time vibration cancellation through active electromagnetic control technology. Support pads can be used for auxiliary vibration damping, resulting in better performance. Furthermore, the support base frame and support feet can be adjusted for height via support rods and lifting slots, offering excellent adaptability.

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 application provides a power management adaptive feedback regulation method and system with a wide voltage input range. In the application, the output current ripple waveform of the power supply is collected, wavelet packet decomposition is performed to extract the energy distribution of the characteristic frequency band, and the dynamic offset characteristics of the energy distribution with the wide voltage input fluctuation are used to identify the load change mode. The electromagnetic vibration caused by the current ripple is captured and converted into recovered electrical energy, which is directly supplied to the feedback circuit to realize energy self-supply. The recovered electrical energy is introduced into the ripple injection inverting proportional circuit, the gain coefficient and phase offset are dynamically set according to the load mode, and the inverting ripple signal is generated. The inverting ripple signal is superimposed on the feedback voltage to offset the ripple fluctuation by dynamically tracking the ripple amplitude change caused by the wide voltage input. Finally, the response speed of the rectifier tube driving timing is adjusted according to the input voltage fluctuation amplitude, and the optimized feedback control signal is generated. The application realizes the load fluctuation compensation and energy recovery closed loop.