323 results about "Radial vibration" patented technology

The invention provides a water pump residual life prediction method based on a large model, and the method comprises the following steps: S1, collecting the multi-source heterogeneous data of the operation of a water pump in real time through a vibration sensor, a temperature sensor, a pressure sensor and a monitoring unit, the temperature sensor monitors temperature gradient changes of the bearing and the sealing cavity, the pressure sensor records inlet and outlet pressure fluctuation characteristics, and the monitoring unit extracts three-phase current harmonic components of the motor; s2, carrying out lightweight preprocessing on the multi-source heterogeneous original sensing data at an edge computing node, wherein the lightweight preprocessing comprises vibration signal noise reduction processing based on wavelet transform, temperature and pressure data calibration normalization of load segments according to working conditions, and transient abnormal data flow filtering through a sliding time window; and S3, inputting the preprocessed data stream into a cloud large model platform, and analyzing the long-period dependency relationship of the vibration signals through a Transform encoder in a time sequence feature extraction module.

The invention discloses an ultrasonic-assisted broaching machine tool based on a resonance broach and a design method. The machine tool comprises a broaching machine structure; a groove of the ultrasonic broaching tool is located in the position corresponding to the vibration mode wave crest of the broaching tool; the main piezoelectric actuator device is arranged in the groove; the compensation piezoelectric actuator device is arranged at the position, corresponding to the radial vibration mode, of the ultrasonic broach; the frequency of the ultrasonic power supply and the main power supply is the corresponding frequency when the axial ultrasonic vibration amplitude is maximum and the radial ultrasonic vibration amplitude is minimum under different power supply frequencies, the main driving voltage is determined according to the frequency of the main power supply, the preset broaching maximum speed of the broach and an ultrasonic auxiliary broaching effectiveness coefficient, and the frequency of the compensation power supply is the same as the frequency of the main power supply; the phase difference is 180 degrees, and the compensation driving voltage is the corresponding driving voltage when the ratio of the radial ultrasonic vibration amplitude to the axial ultrasonic vibration amplitude in different driving voltages is smaller than or equal to a preset threshold value. The ultrasonic assistance of the broach which needs to be frequently clamped can be realized.

The invention discloses a rotor unbalance rapid adjustment method based on Kalman filtering, and belongs to the technical field of rotor dynamic balance. According to the method, a rotor rotating speed signal is obtained through a magnetic encoder, and a piezoelectric vibration sensor is triggered to collect a radial vibration signal. In the aspect of signal processing, a zero phase shift filter is adopted to remove noise interference, and an initial phase and an amplitude are extracted by using FFT (Fast Fourier Transform). And calculating a rotating speed change rate based on the sliding time window, and judging whether the rotor is in a steady-state or transient-state working condition. Under the transient working condition, a state space model containing amplitude, phase and rotating speed is constructed, and unbalance adjustment parameters are predicted through Kalman filtering recursion; and under a steady-state working condition, accurately calculating a correction parameter by adopting a least square method. In addition, a least square fitting model based on a sine function is constructed, amplitude estimation is optimized, and the unbalance calculation precision is improved. According to the invention, the unbalance of the rotor can be quickly and accurately adjusted, and the stability and the service life of a rotating system are improved.

The invention provides a driving station state monitoring system for a gravity energy storage transportation track, and relates to the technical field of intelligent control, and the system comprises a calculation module which is used for responding to a primary early warning signal, collecting the real-time oil pressure data of a gear box, a bearing temperature rise rate curve and a dynamic torque feedback value of a target standby driving station, and calculating an availability index; the correction module is used for determining the position of a gearbox input end flange and a driving motor output end coupler as a first monitoring point and the position of connection between a bearing seat and an output shaft as a second monitoring point on a transmission link of the target standby driving station, and respectively calculating the axial temperature gradient difference and the radial vibration energy ratio between the two monitoring points; and generating a dynamic correction value through a preset coupling coefficient, and compensating the availability index based on the dynamic correction value to obtain a corrected index. The operation reliability of the gravity energy storage system can be improved.

The invention relates to the technical field of motor regulation and control, in particular to a dust collector motor vibration noise reduction method and system, and the method comprises the steps: obtaining a sinusoidal modulation electric signal generated by a sinusoidal pulse width modulation frequency converter, and carrying out the harmonic filtering of the sinusoidal modulation electric signal, and obtaining a higher harmonic; calculating harmonic interference magnetomotive force according to the higher harmonics, multiplying the harmonic interference magnetomotive force by the air gap magnetic conductance to obtain radial magnetic flux density, and calculating radial electromagnetic force waves; performing feature extraction operation on the radial electromagnetic force wave to obtain a feature set, performing principal component analysis operation based on vibration intensity to obtain a radial vibration principal component feature set, and performing noise principal component harmonic extraction operation on the higher harmonic according to the radial vibration principal component feature set to obtain a noise harmonic; and performing noise reduction calculation on the sinusoidal modulation electric signal according to the noise harmonic wave to obtain a noise reduction modulation electric signal, and performing power control on the motor. The vibration noise of the dust collector motor can be reduced.

The invention discloses a wind power digital twinning robustness detection method based on time-frequency revolving door perception matching, and the method comprises the steps: obtaining a fan detection signal generated by digital twinning and a fan detection signal collected by a sensor, the fan detection signal being the temperature, radial vibration, axial vibration, current, voltage or power of a fan; the two kinds of fan detection signals are preprocessed through a rotating door algorithm SDA so that the characteristic frequency amplitude error of the preprocessed fan detection signals can be smaller than a preset threshold value; and respectively updating receptive fields of the corresponding convolutional neural networks based on the preprocessed fan detection signals so as to determine the number of convolutional layers of the convolutional neural networks, and outputting the difference between the number of convolutional layers of the convolutional neural networks of the two fan detection signals as a robustness detection result of digital twinning. The invention aims to improve the data processing capability, solve the problem of misdiagnosis possibly caused by spectrum deviation and aliasing and signal abrupt change when the signal stably changes, and improve the accuracy of robustness judgment.

The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

The invention discloses a rotor system with a resonance point self-test function, a measurement method, equipment and a medium. The system comprises a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer, the controller is used for generating a control signal according to the user configuration parameters and sending the control signal to the active electromagnetic bearing; the active electromagnetic bearing is used for outputting electromagnetic excitation force to the rotor system according to the control signal, so that the rotor system generates radial vibration displacement under the action of the electromagnetic excitation force; the radial vibration displacement sensor is used for collecting a radial vibration displacement signal of the rotor system and sending the radial vibration displacement signal to the spectrum analyzer; and the spectrum analyzer is used for generating a spectrum signal according to the radial vibration displacement signal and determining a rotor resonance point according to the spectrum signal. According to the technical scheme, self-testing of the resonance point of the rotor system can be realized without a speed increasing and decreasing test and an additional excitation device, the safety of the rotor is guaranteed, and uncontrollable accidents are avoided.

The invention provides a self-adaptive robot grinding and polishing machining system and method for a difficult-to-grind complex component, and the machining system comprises a 3D laser scanner which is used for carrying out modeling according to the shape and size of a workpiece, and automatically dividing a grinding region and carrying out self-adaptive path planning according to geometrical characteristics; the mechanical arm is used for clamping a workpiece to move according to a planned path; an abrasive belt floating polishing device; and the grinding device is provided with a self-adaptive grinding and polishing mechanism capable of moving up and down in the axial direction, and the self-adaptive grinding and polishing mechanism is used for conducting constant-force grinding on the workpiece, compensating tool abrasion in real time, conducting radial vibration auxiliary grinding and replacing a grinding head according to requirements. The multi-process combined robot grinding and polishing system can be used for grinding the round corner transition position of a narrow inner concave surface and a stepped right-angle concave surface of a workpiece, self-adaptive process division is carried out on the workpiece according to geometrical characteristics according to the precise grinding requirements of various complex components difficult to grind, and a plurality of devices are integrated together to form the multi-process combined robot grinding and polishing system; and all-dimensional grinding operation on the difficult-to-grind complex component is achieved.

The invention discloses a trace element compound premix granulating and screening device and an application method, and relates to the technical field of screening equipment.The trace element compound premix granulating and screening device comprises a base plate, a scrap screening speed control mechanism, a multi-stage screening mechanism, a screen drum radial vibration mechanism and a screen drum lifting and transferring mechanism; an inclined rectangular frame is mounted on the upper side of the seat plate through an inclined control assembly; the multi-stage screening mechanism comprises rotating sleeves, the rear side of the inclined rectangular frame is transversely and rotationally connected with three longitudinal rotating sleeves at equal intervals, the three rotating sleeves are all connected with a screen drum rotating power assembly, a prism is longitudinally and slidably connected into each rotating sleeve, and the front end of the prism in the middle is connected with a scrap screening assembly; according to the microelement compound premix granulating and screening equipment and the application method, a multi-stage screening mode is adopted, chippings and particles with the size exceeding the standard can be screened out, non-stop screen hole cleaning work can be achieved, and the particle screening efficiency can be improved.

The invention discloses a rotating blade vibration measurement method based on vision, and relates to the technical field of measurement. In order to solve the technical defect that circumferential and radial vibration displacements of a blade cannot be simultaneously and synchronously obtained in a high-speed rotating state in the prior art, the technical scheme provided by the invention is as follows: calculating the time when the blade reaches a preset measurement position based on a non-contact sensor, and respectively triggering a high-speed camera to collect circumferential and radial original images; the method comprises the following steps: performing micro motion amplification processing on an image, tracking pixel movement by using a sparse optical flow algorithm and converting the pixel movement into vibration displacement, and finally performing time domain and frequency domain feature extraction on circumferential and radial vibration data to obtain vibration feature parameters. The method is suitable for online vibration monitoring and analysis work of rotating blades of wind driven generators or aero-engines and the like under the condition of high-speed rotation.

The invention relates to the technical field of fault diagnosis, in particular to a sun gear fault tooth positioning method based on combination of rotor sensing and tidal period effect, which comprises the following steps of: fixing a sensor module on an input shaft of a planetary gear box through a thermocouple adhesive, establishing a reference frame of a fixed shaft system and a rotating coordinate system, collecting radial vibration signals, and determining the radial vibration signals; mathematical modeling analysis is carried out on the collected radial vibration signals, and low-frequency components of the vibration signals are extracted by using a low-pass filter and can be used as absolute phase reference signals; the method comprises the following steps: performing time domain compensation on a meshing event of a sun gear and a single planetary gear by calculating meshing dynamic excitation time offset of the sun gear and simplifying a gearbox model, and ensuring the integrity of the single-tooth meshing times of the sun gear in a complete meshing period, so as to accurately analyze the meshing characteristics of each single tooth of the sun gear and the planetary gear; a sun gear fault working condition is simulated through an experiment, and periodic change of fault tooth meshing is analyzed; deterministic components and random components in the vibration signals are separated through cepstrum analysis; a band-pass filter is used for extracting gear meshing components from deterministic components; a minimum entropy deconvolution filtering technology and a square envelope technology are used for carrying out fault feature enhancement on random components; finally, absolute phase reference provided by gravitational acceleration of a rotor perception sensor is used, and a tidal period effect is combined; and calculating a single-tooth meshing frequency code of the fault tooth lag absolute phase reference point, and determining the position of the fault tooth by using different codes corresponding to different fault positions. The complexity of the monitoring system is effectively reduced, the influence of monitoring equipment on the operation of the planetary gear box is reduced, and the fault positioning accuracy of the sun gear is effectively improved.

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

The utility model discloses a device for detecting the safety performance of a mining belt conveyor. The device comprises a speed sensor, a pressure sensor, a displacement sensor, a tilt angle sensor, a vibration sensor, a weighing sensor, a tension and pressure sensor, a temperature, humidity and atmospheric pressure sensor, a tablet terminal and a computer terminal which are arranged on an underground belt conveyor device. All components of the device are provided with zigbee wireless modules, and each module comprises a high-performance wireless microcontroller with the model of JN5161A and a completely integrated front-end module with the model of RFX2401C. The device for detecting the safety performance of the mining belt conveyor can comprehensively measure and display the speed, the brake oil pressure, the carrier roller displacement, the axial vibration speed, the radial vibration speed, the tension and pressure, the weighing, the angle, the environment temperature, the environment humidity and the atmospheric pressure of the mining belt conveyor. The measurement parameters can be wirelessly sent to a tablet terminal and a computer terminal and displayed in real time through double terminals of an app of a tablet and an upper computer of a computer, and curve graphs and reports can be output, and early warning prompts and the like can be carried out.

The invention relates to the technical field of generators, in particular to a permanent magnet rotor generator for a vehicle, which comprises a motor main body, a rotating permanent magnet rotor arranged in the motor main body and a fixed winding stator annularly arranged outside the permanent magnet rotor, and the permanent magnet rotor comprises a motor shaft and a control cylinder fixedly sleeved on the motor shaft. The motor shaft and the winding stator are arranged in the control cylinder, the permanent magnet plates are evenly arranged outside the control cylinder, a reinforcing device and a lubricating mechanism are arranged between every two adjacent permanent magnet plates, the lubricating mechanism is used for supplying lubricating agents to the reinforcing devices, and the reinforcing devices are cushioned between the control cylinder and a thin cylinder annularly arranged in the winding stator. Radial vibration during rotation of the motor shaft is limited, lubrication of the reinforcing device is monitored and guaranteed through the lubricating mechanism, it is guaranteed that the winding stator and the reinforcing device which are in close contact can smoothly slide in a staggered mode, and power transmission heat dissipation of the windings is rapidly taken away by blowing air to gaps between the windings on the winding stator.

The invention belongs to the technical field of synchronous phase modifier fault diagnosis, and discloses a synchronous phase modifier fault type diagnosis method, system and device and a medium, and the method comprises the steps: collecting signal data used for representing armature current, excitation current, stator surface radial vibration and rotor radial vibration in a fault operation state of a synchronous phase modifier; extracting harmonic characteristic quantity; analyzing the fault type of the synchronous phase modifier by combining the change rule of the fault characteristic quantity to obtain a first fault type; identifying the fault type of the synchronous phase modifier based on a support vector machine technology to obtain a second fault type; and determining a final fault type of the synchronous phase modifier based on a comparison result. The method does not need to establish a physical model of the synchronous phase modifier to simulate the fault state, does not need to establish a complex test platform, can achieve the quick diagnosis of the fault type through testing the armature current, the excitation current and the radial vibration of the stator and the rotor in the fault operation state of the synchronous phase modifier, is simple in implementation, and is low in cost.

The invention discloses an anti-vibration fixing device of a high-voltage foil winding new process dry-type transformer, and relates to the technical field of transformers, the anti-vibration fixing device comprises a supporting base, an adjustable supporting screw rod assembly and a multi-stage elastic damping assembly, the lower end of the adjustable supporting screw rod assembly is connected with the supporting base, and the upper end of the adjustable supporting screw rod assembly is connected with the multi-stage elastic damping assembly; the multi-stage elastic damping assembly is arranged between the adjustable supporting screw assembly and the coil end cover in series and used for absorbing axial vibration generated in the operation process of the coil, and an annular clamping base is installed on the side wall of the coil and used for restraining the radial direction of the coil and absorbing radial vibration. A guide positioning block is installed between the bottom of the coil and the supporting base. By installing the multi-stage elastic damping assembly, the function of segmented absorption and attenuation of coil operation vibration is achieved, the problem that a traditional single elastic element can only work in a limited frequency band and cannot suppress full-frequency-band vibration from dozens of hertz to hundreds of hertz at the same time is solved, the vibration isolation frequency band width is effectively expanded, noise is remarkably reduced, and the vibration isolation effect is improved. And the service lives of the coil and the box body are prolonged.

The invention discloses an aero-engine vibration fault positioning method based on multiple measuring points, and the method comprises the following steps: obtaining a rotating speed key phase signal of a rotor in an operation state of an aero-engine and a vibration signal of each measuring point of the aero-engine, the measuring points including an air inlet casing, an intermediate casing and a turbine rear casing, the vibration signals comprise an axial vibration signal, a radial vibration signal and a circumferential vibration signal; performing transient and steady state vibration phase analysis and order analysis on the rotating speed key phase signal and the vibration signal; and determining a fault type and / or an excitation source position according to phase analysis and order analysis results of each measuring point. According to the method, transient and steady state vibration phase analysis and order analysis are carried out on the vibration signals of the air inlet casing, the intermediate casing and the turbine rear casing of the aero-engine in the rotating state, then the fault type and the excitation source position are obtained, and the fault judgment accuracy is high.

The invention discloses a multi-signal fusion permanent magnet motor turn-to-turn short circuit fault diagnosis method, which is used for solving the technical problem that turn short is diagnosed only from motor current in the prior art, especially for early turn short diagnosis, the probability of missing report is high, and belongs to the technical field of motor turn-to-turn short circuit fault diagnosis. The three-phase current, the three-phase line voltage and the radial vibration acceleration signal of the bearing area of the bearing end cover of the motor are collected in real time in the operation process of the motor. The method specifically comprises the following steps of 1, current fault feature extraction; step 2, vibration fault feature extraction; s21, vibration spectrum fault feature extraction; s22, vibration envelope spectrum fault feature extraction; s23, calculating a vibration fault feature mark; step 3, turn short online feature mark calculation; 4, judging whether back electromotive force characteristic calculation is started or not; step 5, back electromotive force fault feature extraction; and step 6, final diagnosis of the short turn of the motor.

A wire-inserted stator with an intelligent temperature control heating function relates to the technical field of vibration motor manufacturing, and is characterized in that an isolation plate is arranged, air holes in the isolation plate are utilized, when a motor works, air flow generated by a rotor enters the air holes and enters a wire slot of the stator from the air holes to impact a shifting plate, and then a positioning sleeve and a sensor sleeve are driven to rotate; due to the fact that the sensor sleeve and the positioning sleeve are in flexible connection, vibration on the positioning sleeve can be buffered, in addition, the gyroscopic effect generated by rotation of the sensor sleeve can resist part of radial vibration along with rotation of the sensor sleeve, a certain damping effect can be achieved, and the performance of the sensor is prevented from being affected by the vibration.

The invention discloses an external rotor permanent magnet synchronous motor noise prediction method, system and device and a medium, and relates to the technical field of motor noise, and the method comprises the steps: building a two-dimensional electromagnetic model of an external rotor permanent magnet synchronous motor ERPMSM; analyzing the spatial distribution and frequency characteristics of the electromagnetic force acting on the surface of the permanent magnet through the two-dimensional electromagnetic model to obtain the electromagnetic force; establishing a three-dimensional structure model of the ERPMSM, and loading the electromagnetic force into the three-dimensional structure model in a nodal force form to obtain a nodal force acting on the surface of the permanent magnet in a three-dimensional space; based on the three-dimensional structure model and the nodal force, the radial vibration acceleration of the ERPMSM outer rotor is calculated by adopting a mode superposition method; and taking the radial vibration of the outer rotor as an acoustic boundary condition, and predicting the noise of the ERPMSM by using an acoustic boundary element method.

The invention relates to a distributed optical fiber micro-seismic sensing device and a tunnel monitoring method, and belongs to the technical field of micro-seismic monitoring, the distributed optical fiber micro-seismic sensing device comprises a plurality of vibration measurement sensitization assemblies installed on the same tunnel section, and the plurality of vibration measurement sensitization assemblies are connected through distributed sensing optical cables; distributed sensing optical cables in the vibration measurement sensitization assembly are arranged in the radial direction of the tunnel and used for monitoring vibration signals of hidden and micro crack development of surrounding rock near the tunnel face in the radial direction. During monitoring, the vibration measurement sensibilization assembly at the head end or the tail end of the distributed optical fiber microseismic sensing device is sequentially connected with the distributed optical fiber demodulator, the monitoring host and the monitoring center to form a microseismic sensing monitoring network. The method for monitoring the tunnel by adopting the distributed optical fiber micro-seismic sensing device can realize the axial and radial sensing of the vibration signal, and overcomes the defect that the distributed sensing optical fiber is only sensitive to the axial vibration signal but not sensitive to the radial vibration signal.

The invention relates to an automatic cleaning anti-blocking falling film evaporator, which mainly comprises a spiral power wheel, an anti-blocking pipe orifice bearing bracket, a pipe orifice cleaning steel wire, a steel wire spiral, an intelligent numerical control cabinet, a liquid distribution disc, a spraying hole cleaning steel wire and an intelligent numerical control cabinet. Falling film liquid flow impacts the steel wire spirals to drive radial vibration of hundreds of times per minute and slow rotation of less than 5 revolutions per minute, uniform and automatic cleaning of the heat exchange tubes is achieved, and possible abrasion of the heat exchange tubes is prevented. And the spiral power wheel utilizes the rotating power obtained by a rapid two-phase flow formed by mixing secondary steam at the outlet section of the heat exchange tube and a falling film liquid flow, so that the power for automatically cleaning the steel wire spiral is enhanced. The spraying hole cleaning steel wire and the pipe opening cleaning steel wire are driven to continuously rotate by utilizing the power of liquid flow impulse, so that timely cleaning and blockage prevention are realized. The intelligent numerical control cabinet can automatically adjust the automatic cleaning strength of the steel wire spiral according to the temperature data of the operation of the evaporator, and periodically assists the steel wire spiral which may stop rotating to recover to rotate again. And the reliability of automatic cleaning is improved.

The invention discloses an unmanned underwater vehicle propulsion motor performance degradation device and method based on vibration stress, and the device comprises a vibration stress simulation module, a load simulation module, a motor control module, a water tank, a pedestal and the like. Alternating stress influence of environmental stress such as waves, surges and ocean currents on a main shaft and a bearing of the motor on the unmanned underwater vehicle in water is simulated, and the performance degradation process of the propulsion motor is accelerated; the water tank is filled with seawater, the salinity of the seawater is adjusted, and different sea areas and depths where the propulsion motor is located are simulated; the performance degradation characteristic parameters of the propulsion motor of the unmanned underwater vehicle can be obtained by monitoring the characteristic parameters such as the rotation speed, the power and the vibration frequency of the propulsion motor in real time, and test data support is provided for research of a fault evolution mechanism of the propulsion motor of the unmanned underwater vehicle and construction of a performance degradation model of the propulsion motor.

The invention belongs to the technical field of machining, and particularly relates to an ultrasonic internal broaching broach vibration mode design and control method, which comprises the following steps: firstly, based on a modal isolation structure design method, accurately designing axial and radial vibration modes of a broach so as to meet the requirements of high-precision and high-efficiency broaching machining; a signal processing method based on filtering driving is provided, a designed target vibration mode is accurately driven, the problem that the vibration mode bandwidth of PZT changes along with working conditions such as temperature is solved, finally, due to the fact that the broach frequency vibration mode drifts along with working condition changes in practical application, a dynamic frequency tracking system is developed, and it is ensured that when signals are close to the resonant frequency, the vibration mode bandwidth of the PZT changes along with the working condition changes. The driving frequency can be dynamically adjusted, and it is ensured that the ultrasonic-assisted broaching system is always kept in the target vibration mode. Through optimization and improvement in the three aspects, the ultrasonic vibration broaching effect of the high-strength and high-hardness workpiece is remarkably improved.

The invention discloses a vibration reduction method based on a stator offset auxiliary slot permanent magnet motor. In-depth research on radial electromagnetic force waves causing vibration of the permanent magnet motor finds that the radial electromagnetic force waves are mainly composed of a no-load component and a load component, and a certain phase difference exists between the no-load component and the load component. A stator offset auxiliary slot structure is provided, as shown in figure 1, through optimization of an offset angle bnotch and an offset size Rnotch of the auxiliary slot, a phase difference between a no-load component and a load component of a radial electromagnetic force can be 180 degrees, and the sizes of the no-load component and the load component are similar, so that the amplitude of an electromagnetic force wave can be greatly reduced. The radial vibration acceleration of the motor is weakened by at least 50%. A permanent magnet servo motor system, an automobile electric power steering system, a permanent magnet direct drive wind power generation system and the like can be used.

The invention provides an ultra-deep well large annulus flexible righting transverse vibration reduction method, which belongs to the technical field of well drilling and drilling, and comprises the following steps of: inputting pre-drilling well drilling engineering information, and calculating a whole well section drill string vibration distribution form based on an established drill string finite element dynamic model; the tripping-in positions and the number of the flexible stabilizers and the layer number and the compression space of plate springs in the flexible stabilizers are designed, and an initial vibration reduction scheme is generated; comparing the real-time vibration data with the predicted vibration distribution pattern, carrying out real-time risk assessment, carrying out dynamic optimization on the initial vibration reduction scheme according to the real-time risk assessment, adjusting the tripping-in position and number of flexible stabilizers, the number of plate spring layers and the compression space, and generating an optimized real-time vibration reduction scheme; a flexible stabilizer is put in the designated position of the drill column; when the drill column transversely vibrates and collides with the well wall, the buffer block of the flexible stabilizer is pressed, the plate spring is driven to generate radial elastic deformation, part of radial impact kinetic energy is converted into elastic potential energy of the plate spring to be stored, and radial vibration reduction is achieved.

The utility model provides a disc type multichannel ultrasonic sample processing device which comprises a shell, a circular groove is formed in the upper surface of the shell, a reagent tube mold is fixedly installed in the circular groove and is in a circular ring shape, and a reagent tube is slidably connected into the reagent tube mold. A radial vibration disc is slidably connected to the circular ring center of the reagent tube mold, and a longitudinal vibration transducer is fixedly mounted at the bottom of the radial vibration disc. By designing the reagent tube mold, the longitudinal vibration energy converter and the radial vibration disc, when the reagent tube mold is used, the motor is started to drive the longitudinal vibration energy converter and the radial vibration disc to move upwards in the reagent tube mold so as to relieve extrusion on the inner wall of the reagent tube mold, a reagent tube can be conveniently inserted into the reagent tube mold, and then the longitudinal vibration energy converter is started to drive the longitudinal vibration energy converter and the radial vibration disc to move upwards. And the radial vibration disc and the reagent tube are driven to shake, so that samples are uniformly dispersed and mixed, non-contact and non-pollution of the samples are realized, and the samples can be extracted more efficiently and accurately.

The invention discloses a vibration reduction assembly and an extremely-low vibration reduction system for an extremely-low-temperature refrigeration platform. The vibration reduction assembly comprises a main frame. The active suppression platform is arranged above the main frame, reads a signal in real time through a sensor in the active suppression platform and feeds back the signal to an internal control unit, and the control unit sends an instruction to reversely adjust the compression amount of an internal spring so as to realize active vibration reduction; the rotary valve vibration reduction mounting seat is used for respectively fixing the rotary valve motor and the phase modulation air reservoir through a supporting plate and a fixed clamping block and realizing vibration reduction through a vibration reduction element arranged in the rotary valve vibration reduction mounting seat; a second vibration reduction body is arranged in the corrugated pipe assembly so as to reduce vibration in the vertical direction and the radial direction. According to the invention, the active suppression platform is arranged to actively eliminate vibration so as to reduce vibration or vibration transmission. The corrugated pipe is arranged above the active restraining platform, vertical vibration of the cold head of the refrigerating machine can be reduced, a plurality of second vibration reduction bodies are arranged on the periphery of the corrugated pipe body, and radial vibration of the cold head of the refrigerating machine can be reduced through the second vibration reduction bodies.

The invention discloses a wind turbine generator misalignment fault diagnosis method, system and device and a medium, and belongs to the technical field of wind turbine generator state monitoring, the method comprises the steps that wind turbine generator coupler position vibration signals and rotating speed signals are collected, and the vibration signals comprise axial vibration signals and radial vibration signals; performing noise reduction processing on the vibration signal to obtain a noise-reduced vibration signal; obtaining an axis track picture, an axial order spectrum picture and a radial order spectrum picture, fusing the axis track picture, the axial order spectrum picture and the radial order spectrum picture to obtain a low-rank fusion result, carrying out dimension connection on the low-rank fusion result and the vibration signal historical time sequence characteristics after noise reduction to obtain fused new characteristics, and carrying out noise reduction on the new characteristics; performing fault diagnosis based on the fused new features; according to the method, the signal processing method and the deep learning technology are combined, the accuracy of misalignment fault diagnosis of the wind turbine generator is improved, and a certain diagnosis effect is achieved on early potential misalignment faults.