132 results about "Electromagnetic vibration" patented technology

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 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 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 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.

The application discloses a hybrid permanent magnet structure design method for reducing vibration of a permanent magnet motor, and solves the problem of excessive vibration of the permanent magnet motor. The method is to adopt two or more kinds of permanent magnet materials with different residual magnetism densities, adopt appropriate parameters to combine into a required hybrid permanent magnet, and magnetize the hybrid permanent magnet with the maximum residual magnetism density during magnetization. After the permanent magnet motor adopts the hybrid permanent magnet structure, the harmonic content of the permanent magnet magnetic field can be significantly reduced, the sinusoidal degree of the motor air gap magnetic field is improved, and then the low space order radial electromagnetic force density generated by the action of the permanent magnet magnetic field is weakened, the electromagnetic vibration of the motor is reduced, and the problem of excessive vibration of the motor is obviously improved.

This invention provides a novel vibration fatigue testing method for gas turbine blades. Addressing the problems of large specimen wear, long testing time, and limited results associated with traditional step-and-step stress loading methods for obtaining blade fatigue limits, this invention excites blade resonance on an electromagnetic vibration table using novel step-and-step stress loading techniques on identical blade specimens. While retaining the step-and-step matching standard, when limited test data cannot meet the matching requirements, a stress "concession" method is rationally applied based on the turbine blade structure and fatigue strength level to eliminate test data with significant stress deviations, thereby obtaining the median fatigue strength of blades from the same batch. This invention makes stress matching faster and more flexible, requiring only 2-3 stress levels to achieve a test fitting result with a confidence level of over 95%, demonstrating high accuracy. This method is applicable to fatigue limit tests of all gas turbine blades.

The utility model relates to the technical field of screening machinery, and provides an electromagnetic vibration dewatering screen which comprises a pair of bottom frames and a shell, the shell is arranged on the bottom frames, a spraying assembly is arranged on the top of the shell, a vibration dewatering assembly is arranged on the top of the shell, and feeding assemblies are arranged at the two ends of the shell. The top frames are fixed to the top of the shell, a pair of vibration motors are arranged on the tops of the top frames, dewatering meshes are formed in the two surfaces in the shell, and a pair of drainage covers are arranged at the bottom of the shell. By means of the technical scheme, the problems that in the related technology, due to the fact that materials are vibrated in the screen box only through the vibration effect of a vibration motor, the material conveying speed is low, the materials at the position of a material inlet are likely to be accumulated, the thickness of the materials is large when the materials are conveyed, and the dewatering effect and speed are affected are solved.

The application relates to a multi-aperture imaging space remote sensing target positioning optical system and a calibration method, and relates to the field of remote sensing and aerospace imaging optical instruments. The application solves the contradiction between the requirements of a large field of view and high resolution imaging of a traditional single-aperture optical imaging system, and realizes accurate positioning of a target to meet the intelligent requirements of a multi-aperture optical imaging system. The multi-aperture imaging space remote sensing target positioning sub-aperture imaging optical system comprises an electromagnetic vibration mirror, a beam-reducing telescope group, a fast reflection mirror and a rear focusing mirror group. The beam-reducing telescope group and the rear focusing mirror group are connected through the fast reflection mirror, and the light beam is connected with an imaging branch through the electromagnetic vibration mirror. After the imaging light beam passes through the telescope system, the imaging light beam is reflected by the fast reflection mirror and focused on a detector to form an image. The application is also suitable for a mobile platform for fast positioning and high-precision capturing of a dynamic target in the field of industrial precision machining and space remote sensing.

The application discloses a multifunctional high-speed laser cladding device, which comprises a laser, an acoustic emission detection device, an infrared monitoring device, a powder feeding device, a CCD high-speed camera, a heat treatment device and an electromagnetic vibration device; the laser is located at the center of the device; the acoustic emission detection device, the infrared monitoring device and the CCD high-speed camera are arranged on one side of a molten pool; the powder feeding device is arranged above the laser and comprises a powder feeding turntable and a powder feeding pipeline; the heat treatment device moves synchronously and in the same direction with the powder feeding nozzle; and the electromagnetic vibration device is arranged at the lowermost part of the device. The application can monitor the cladding process in multiple aspects in real time, and can simultaneously perform heat treatment, so that the cladding quality is improved.

The utility model discloses a strap type vibration sputum excretion device, which belongs to the technical field of sputum excretion devices and comprises a shell, a wearable component is arranged on the front side of the shell, a massage groove is formed in the front side of the shell, massage cloth is fixedly connected to an inner cavity of the massage groove, and a movable seat is slidably connected to the inner cavity of the shell. A driving assembly used for driving the moving seat to move is installed at the top of the shell, connecting seats are fixedly connected to the two sides of the moving seat, and electromagnetic vibrators are installed on the surfaces of the connecting seats; through the arrangement of the wearing assembly, the whole device can be worn on the back of a patient, the back of the patient can be vibrated and massaged through the matched use of the electromagnetic vibrator and the massage head, and in the massage process, the massage head can be driven to move up and down along the back of the patient through the arrangement of the driving assembly; through the arrangement of the vibration massage device, the vibration massage device has the advantage that the vibration position can be moved in the using process.

The utility model provides a dry quenching poisonous and harmful gas discharge system which comprises a dry quenching furnace, a belt vestibule, a belt conveyor assembled in the belt vestibule, an interlocking signal protection device and a central control room, wherein a coke discharge port is formed in the bottom of the dry quenching furnace, and a flat valve is arranged in the coke discharge port; the lower part of the coke discharge port is connected with an electromagnetic vibration feeder, a discharge port of the electromagnetic vibration feeder is connected with a feed port of a rotary sealing valve, and a discharge port of the rotary sealing valve is connected with a coke discharge chute; linkage protection is added when running signals of the environment dust removal fan of the coke dry quenching device are lost, the axial flow fan is started to replace gas in the vestibule of the belt conveyor, the concentration of poisonous and harmful gas is reduced, the audible and visual alarm reminds people to evacuate in time through voice, personal injury accidents are avoided, the safety of workers is protected, operation is convenient, and the working efficiency is improved. The maintenance cost is low, and the applicability is wide.

The invention relates to a fiber foreign matter sorting machine which comprises a foreign matter collecting system used for collecting and conveying foreign matters; the discharging assembly is used for generating and accumulating electrostatic charges; the electromagnetic vibration feeder is used for conveying materials; the electromagnetic vibration feeder comprises a conveying channel, a mounting opening and an adhesive tape opening are formed in the conveying channel, and the discharging assembly is located on the mounting opening. The foreign matter collecting system comprises a rack, an unwinding roller and a winding roller, the unwinding roller and the winding roller are arranged on the rack, an adhesive tape roll is arranged on the unwinding roller, and an adhesive tape on the adhesive tape roll penetrates through an adhesive tape opening to be connected with the winding roller. The fiber foreign matter sorting machine has the following advantages that fiber foreign matters in graphite powder are subjected to electrostatic sorting, and the separation effect is good; the sorting operation is carried out in the conveying channel, so that the conveying of the materials and the sorting of fiber foreign matters are synchronously carried out, and the working efficiency is high; the adhesive tape surface is adopted to adhere fiber foreign matters, the collection effect is good, and the removal efficiency is high.

The present application belongs to the field of vibration power generation. It relates to a vibration pickup component for vibration power generator, which is composed of a square frame, a support, a vibrator swinging around a point above the center of gravity, and a anti-dropping assembly. It mainly plays the role of expanding the frequency band and picking up low vibration energy. It also relates to a vibration pickup device for electromagnetic vibration power generator and a vibration pickup device for composite vibration power generator, which are both composed of a vibration pickup component and a gimbals. Both of them can make the vibration pickup component pick up the omnidirectional external excitation. The latter also produces multiple types of feedback actions for various power generation units. It also relates to an electromagnetic vibration power generator and a composite vibration power generator. The former is composed of a vibration pickup device for electromagnetic vibration power generator, a permanent magnet, etc. The latter is composed of a vibration pickup device for composite vibration power generator, a permanent magnet, a piezoelectric and friction power generation unit, a wheel disc type friction nano power generation unit, etc. Both of them improve the power generation efficiency of picking up environmental vibration energy.

The invention discloses a stator core motor and a vehicle, and relates to the technical field of motor equipment, the stator core comprises a yoke part, tooth parts and tooth boots arranged on the sides, away from the yoke part, of the tooth parts, the tooth parts are evenly distributed in the circumferential direction of the yoke part, and the tooth boots are arranged on the sides, away from the yoke part, of the tooth parts. Auxiliary grooves extending in the axial direction of the stator iron core are formed in the inner circumferential walls of at least part of the tooth boots, and at least one parameter of the auxiliary grooves changes in the axial direction. According to the stator core provided by the embodiment of the invention, the at least one parameter of the auxiliary slot is set to be in the form of changing along the axial direction, so that broadband and cooperative suppression of multi-order harmonics of an air-gap magnetic field can be realized, and electromagnetic vibration and noise of a motor in a whole working interval can be reduced.

The application relates to a piezoelectric rubber electromagnetic integrated composite vibration isolation device, which comprises a shell and a force transmission rod assembly, the shell is internally provided with an energy collection unit and multiple vibration isolation units, the lower end of the force transmission rod assembly is arranged in the shell, the upper end of the force transmission rod assembly is arranged to pass through the top of the shell, the multiple vibration isolation units comprise piezoelectric stack vibration isolation assemblies, rubber vibration isolation assemblies and electromagnetic vibration isolation assemblies, the rubber vibration isolation assemblies are arranged between the piezoelectric stack vibration isolation assemblies and the electromagnetic vibration isolation assemblies, the bottom end of the force transmission rod assembly is in abutment with the piezoelectric stack vibration isolation assemblies, and the energy collection unit is connected with the electromagnetic vibration isolation assemblies through wires. The device can absorb the energy generated by external vibration, thereby reducing the influence of vibration, meanwhile, part of the vibration energy is converted into electric energy, and the generated current is transmitted to the electromagnetic vibration isolation assemblies, so that the electromagnetic vibration isolation assemblies generate damping force in the direction opposite to the vibration direction, and the piezoelectric, rubber and electromagnetic vibration isolation is realized.

The heat-tracing-free anti-blocking device comprises a negative charge emitter installed on one side of the lower portion of an ash bucket, the negative charge emitter sprays negative ions into the ash bucket through fluidizing air at the front end, a negative charge detector is installed on the upper portion of the side wall of the ash bucket, and the negative ions are injected into the ash bucket through the negative charge emitter. And through cooperative dust removal of the electromagnetic rapping device and the air cannon and a super-hydrophobic wear-resistant coating on the inner wall of the dust hopper, dust adhesion prevention and heat tracing-free anti-blocking are achieved. The device is based on the charge mutual exclusion principle and the mechanical vibration and coating hydrophobic characteristic, replaces a traditional steam / electric heating mode, reduces energy consumption, prolongs the maintenance period and is suitable for the high-humidity and high-corrosion dust environment.

The invention relates to a method for testing the particle size distribution of lithium hexafluorophosphate, which comprises the following steps: in an environment with inert gas and water content less than 0.1 ppm, carrying out primary dispersion on lithium hexafluorophosphate powder by adopting an electromagnetic vibration feeding mode, and feeding the dispersed lithium hexafluorophosphate powder into a dry-method sampling area; and carrying out secondary dispersion on the lithium hexafluorophosphate powder subjected to primary dispersion in the dry-method sample injection region by utilizing air compression treatment and dust collection treatment, enabling the lithium hexafluorophosphate powder to enter a test region, and starting a particle size distribution test to obtain the particle size distribution of the lithium hexafluorophosphate powder. According to the method, an electromagnetic vibration feeding mode and a dry laser particle size analysis method are adopted, particle size distribution testing is conducted on the lithium hexafluorophosphate powder in the inert gas environment and the environment with the water content smaller than 0.1 ppm, dispersion mode optimization and dry laser particle size analysis parameter optimization are combined, and the systematic method for testing the particle size distribution of the lithium hexafluorophosphate powder is established. The accuracy of a test result is high, the relative standard deviation RSD is extremely low, and the repeatability and the reliability are high.

The invention relates to the technical field of ball mills, and discloses a high-frequency powerful electromagnetic excitation ball mill, which comprises a rolling charging barrel driven by a mechanical power unit and rotating along the axis of the rolling charging barrel, and two ends of the rolling charging barrel are respectively provided with a feed port and a discharge port; the electromagnetic mechanism is arranged on the outer side of the rolling charging barrel in the circumferential direction, and the electromagnetic mechanism is used for forming a magnetic field in the rolling charging barrel; and a plurality of magnetic grinding balls are arranged in the rolling charging barrel and do composite motion under the rotation action of the rolling charging barrel and the magnetic force action of the magnetic field. A magnetic field is generated in the rolling charging barrel through the electromagnetic mechanism, so that the magnetic grinding balls do compound motion under the rotation action of the rolling charging barrel and the magnetic force action of the magnetic field; the motion speed, the impact frequency and the shearing strength of the grinding ball in the composite motion are obviously higher than those of a traditional ball milling mode, a high-frequency dense energy action area can be formed in the rolling charging barrel, fine grinding is rapidly completed, and the ball milling efficiency is improved.

This invention provides a rotor core, a permanent magnet motor, and a variable frequency compressor, relating to the field of motor and compressor design and manufacturing technology. The rotor core includes uniformly distributed permanent magnet slots, with grooves between adjacent slots. Each groove extends inward along the radial direction of the rotor core, and a parallel magnetic bridge is provided between the groove and the slot. Symmetrically distributed first, second, and third magnetic barrier slots are provided on both sides of the top of each slot. The outer side of the rotor core above the magnetic barrier slots includes a first and second circular arc, with the second arc intersecting the side of the groove. Permanent magnets with alternating magnetic properties are embedded in each slot. In this invention, the outer radius Rr of the rotor core, the distance ho from the midpoint of the bottom of the permanent magnet slot to the center point of the rotor core, and the thickness hm of the permanent magnet satisfy 2 < (Rr - ho) / hm ≤ 3.4. Furthermore, by reasonably setting the position and size of the magnetic barrier slots, the magnetic circuit distribution can be changed, leakage flux reduced, the power density of the motor increased, and the electromagnetic vibration noise of the motor and compressor reduced.

The utility model discloses mobile optical transmitter mobile device relates to optical transmitter mobile device technical field, including laser system, and laser system includes: two wheel frame's self -balancing carrier platform, laser strike system and be used for the vibration isolation system of flexible connection self -balancing carrier platform and laser strike system, adopt two wheel frame's self -balancing carrier platform, and it is small and exquisite and possesses self -balancing function, can be flexible movement and quick deployment in complex terrain, has improved the mobile performance and environmental adaptability of device, through active electromagnetic vibration isolation system, self -balancing carrier platform is connected with laser strike system, can effectively offset the vibration interference in the process of carrier driving, in addition, the laser strike system of the application adopts modular integrated design, contains the module of the cooperation of common aperture optical design system, focusing system etc., has strengthened the scene adaptability, can satisfy the diversified application demand of low altitude economy field.

The invention provides a wireless trigger type electromagnetic vibration well cementation tool which comprises a shell, the shell comprises a vibration shell body arranged on the outer layer and a protection shell body arranged on the inner layer, the protection shell body and the vibration shell body are rigidly connected in an abutting mode through a vibration conduction part, and a slurry channel is formed between the vibration shell body and the protection shell body; the identification control module, the electromagnetic vibration module and the power supply module are arranged in the protection shell, and the identification control module is used for receiving a wireless signal and identifying and obtaining configuration information to generate a control signal; the electromagnetic vibration module is used for triggering and starting based on the control signal, generating vibration with controllable frequency and amplitude according to the control signal and resonating with the vibration shell through the vibration conduction part; the power supply module is electrically connected with the identification control module and the electromagnetic vibration module. The device can generate vibration with controllable frequency and amplitude so as to improve the well cementation effect, is provided with a power supply and is triggered by wireless signals to work, the construction process can be simplified, and the construction efficiency can be improved.

This invention discloses a mid-frame assembly machine, relating to the technical field of workpiece processing equipment. The invention includes a machine body with a frame connected to its bottom. A shielded box vibratory feeder, a first contact piece vibratory feeder, and a second contact piece vibratory feeder are respectively mounted on the upper part of the frame. Electromagnetic vibration mechanisms are connected to the bottom ends of each of the three vibratory feeders for vibration-guided material feeding, ensuring the contact piece parts and the shielded box are sequentially ejected. A first guide rail is provided on one side of the shielded box vibratory feeder, a second guide rail on one side of the first contact piece vibratory feeder, and a third guide rail on one side of the second contact piece vibratory feeder. An electromagnetic vibrator is mounted at the lower end of the first guide rail on one side of the shielded box vibratory feeder for vibration-feeding. This mid-frame assembly machine utilizes a complete and precise mechanical control structure, resulting in higher precision in contact piece processing. It is also convenient to operate, highly controllable, and adaptable.

The invention belongs to the technical field of motor noise reduction control, and particularly relates to a method and system for suppressing vibration noise of a position sensorless control motor. Comprising the following steps: selecting one of a first frequency pulsating voltage signal and a second frequency pulsating voltage signal as a random frequency pulsating voltage signal by adopting a random determination mode; injecting a random frequency pulsating voltage signal under the control of a position sensor, and obtaining a corresponding current response signal; demodulating the current response signal to obtain rotor position information; wherein the matched frequencies of the first frequency pulsating voltage signal and the second frequency pulsating voltage signal are selected, so that a discrete spectrum in a response current PSD frequency spectrum is expanded into a continuous spectrum, and an electromagnetic force wave newly generated by the random frequency pulsating voltage signal is far away from the intrinsic mode frequency of the motor as far as possible. Discrete spectrums of vibration noise caused by injection of random-frequency high-frequency signals are eliminated, and electromagnetic vibration and noise of the motor are effectively reduced.

The utility model discloses a kind of pump body mute structure and dish-washing machine washing pump, a kind of pump body mute structure, including motor, pump shell and impeller, motor includes stator and rotor, rotor rotatably set in stator, stator adopts BMC integrated plastic package;Pump shell is connected with stator;Impeller is set on rotor, and impeller is located in pump shell. Stator adopts BMC integrated plastic package, by integral cladding stator core and winding, to eliminate high-frequency electromagnetic vibration between stator lamination, can also inhibit electromagnetic noise radiation, improve the structural rigidity of stator, cancel the mechanical connection of the shell and winding of prior art, avoid the possibility that noise is generated by shell and winding vibration collision.

The application provides a permanent magnet synchronous motor for a new energy vehicle and an optimization method thereof. The permanent magnet synchronous motor comprises a stator and a rotor. The stator comprises a stator yoke and a stator winding. A plurality of stator teeth are arranged in the inner circle of the stator yoke. The rotor comprises first permanent magnets arranged in a symmetrically embedded manner, second permanent magnets in a non-symmetric circular arc shape, and a magnetic bridge. The number of the first permanent magnets is equal to that of the second permanent magnets. The thickness of the two ends of the second permanent magnets is not equal. For two adjacent second permanent magnets, the distance between one of the second permanent magnets and the center line of the stator winding is not equal to the distance between the other second permanent magnet and the center line of the stator winding. The driving motor is optimized by optimizing the sweep angle and position of the second permanent magnets. The application can reduce electromagnetic vibration noise, thereby improving the riding comfort.

This invention discloses a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator, relating to the field of maintaining constant amplitude vibration in electromagnetic vibrators. The driving device includes an accelerometer, an acceleration detection board, a vibrator drive board, a host computer, and alarm lights. The driving device uses the accelerometer to collect vibration acceleration data from the electromagnetic vibrator, processes the vibration acceleration data using the acceleration detection board to obtain the amplitude value of the electromagnetic vibrator, detects abnormal amplitude values, and automatically adjusts the voltage and / or frequency of the periodic drive signal of the vibrator drive board to achieve constant amplitude operation of the electromagnetic vibrator. This invention's driving device maintains stable operation of the electromagnetic vibrator by automatically adjusting its vibration amplitude, which is beneficial for efficient operation, saves energy consumption, and extends the service life of the electromagnetic vibrator.