390 results about "Motor vibration" patented technology

The invention provides a motor multi-band vibration suppression method and a motor multi-band vibration suppression device based on electromagnetic-mechanical cooperative regulation and control. According to the method, vibration signals are collected in real time, and spectral analysis is carried out to identify vibration frequency distribution; dividing the vibration signal into a low-frequency band, a middle-frequency band and a high-frequency band according to a spectral analysis result, and respectively corresponding to a mechanical vibration source, an electromagnetic excitation source and a structural noise source; a control strategy is dynamically selected based on a vibration frequency band, a low-frequency band triggers a mechanical regulation and control module to output a reverse force to perform vibration suppression, a middle-frequency band triggers an electromagnetic control module to optimize a current waveform and a PWM modulation mode, and a high-frequency band starts a cooperative control strategy of the electromagnetic and mechanical control module; through real-time communication between the controller and each module, vibration feedback signals are continuously monitored, and control parameters are dynamically adjusted according to working condition changes so as to maintain the vibration suppression effect. According to the invention, through cooperative adjustment of electromagnetic control and a mechanical structure, active suppression of vibration of the motor in multiple frequency bands is realized.

The invention provides a motor vibration noise control method and system based on modal resonance frequency prediction, and belongs to the field of motor control. The method comprises the following steps: acquiring each order of intrinsic mode frequency of the permanent magnet motor; a cost function parameter, a current constraint condition and a control target are set, and a model prediction control method is adopted to drive an inverter to operate, specifically, the current operation state quantity of the permanent magnet motor is collected; predicting a state response in a future finite time domain based on the operation state quantity; constructing a value function, and evaluating and optimizing a state change result; and selecting an optimal voltage vector, generating a pulse signal to drive an inverter to execute, obtaining a motor high-frequency electromagnetic force wave distribution condition, comparing the motor high-frequency electromagnetic force wave distribution condition with the intrinsic mode frequency of the permanent magnet motor, and optimizing an optimal voltage vector selection logic. The problems that harmonic waves are concentrated and resonance is easily caused by a fixed switching frequency modulation method in the prior art, and a passive suppression method is high in cost and poor in flexibility are solved.

The invention provides a motor fault diagnosis method for unbalanced data in a noise environment based on a dual-scale network, and the method comprises the steps: collecting acceleration signals of motor vibration in a normal state and a fault state, and constructing a data set; building a fault diagnosis model based on a dual-scale network, wherein the fault diagnosis model comprises a wide convolution kernel 1D convolution module, an attention-based dual-scale module, a convolution-based feature fusion module, an attention 2D convolution layer and a classification module which are connected in sequence; based on the data set, using a category weighted loss function to train a fault diagnosis model based on a dual-scale network to obtain a trained fault diagnosis model; and inputting a motor vibration signal acquired in real time into the trained fault diagnosis model for fault diagnosis to obtain a fault type. According to the method, the influence of noise interference and uneven data on the neural network model is weakened by mining deep fault features and endowing different weights to the loss function.

The invention belongs to the technical field of plastic particle multi-stage screening, and particularly relates to plastic particle multi-stage screening equipment which comprises a screening box, a vibration reduction base is arranged at the bottom of the screening box, a feeding nozzle is arranged at the upper end of the screening box, a vibration motor is arranged in front of the feeding nozzle, and the vibration motor is fixedly installed on the screening box. Three sets of screens are installed in the screening box at equal intervals, a discharging port is formed in the side, right opposite to the three sets of screens, of the screening box, a discharging assembly is arranged on one side of the discharging port, two sets of material guiding mechanisms are arranged in the screening box, and plastic particles are gathered to the uppermost ends of the screens through the guiding effect of material guiding plates; according to the plastic particle screening device, plastic particles are made to roll from the uppermost end to the lowermost end of the screen, it is ensured that the plastic particles can be fully screened through the screen, then a material guide plate is driven to move, the material guide plate can automatically rotate, the upper portion of the screen is shielded, and a worker can adjust the screening level of the plastic particles according to the actual situation.

The utility model relates to the technical field of slag waste sorting, and discloses a slag waste sorting device which comprises a sorting box, a first vibration assembly is arranged between the two sides of the inner wall of the sorting box, and a first screening plate and a second screening plate are sequentially arranged on the first vibration assembly from top to bottom. And two mounting frames are fixedly connected between the two sides of the inner wall of the sorting box. According to the slag waste screening device, the first vibration assembly, the first screening plate, the second screening plate, the beating rod, the pushing plate, the first pushing assembly, the motor, the second vibration assembly, the third screening plate, the fourth screening plate, the second pushing assembly, the guide frame and other structures are used in cooperation, slag waste can be screened for multiple times, and therefore the situation that slag waste screening is not thorough enough is reduced; and the screening effect of the slag waste is improved, the situation that the slag waste needs to be screened subsequently is avoided, the labor amount of personnel is effectively reduced, and the subsequent processing efficiency of the slag waste is further improved.

The utility model provides a sand drainage plate inserting device which comprises a crawler machine, a rotatable mechanical arm is arranged above the crawler machine, a plate inserting device is arranged at the front end of the mechanical arm, the plate inserting device comprises a vibration assembly, a cutting assembly is arranged below the vibration assembly, the vibration assembly comprises a vibration seat, a vibration motor is arranged above the vibration seat, and the cutting assembly is arranged below the vibration seat. A connecting flange is arranged below the vibration seat, a feeding port is formed in one side of the vibration seat and used for loading a drainage plate, the cutting assembly comprises a cutting pipe, a top flange is arranged at the top end of the cutting pipe, and the top flange is used for being connected with the connecting flange. The construction efficiency is remarkably improved, the construction difficulty is reduced, the method is suitable for various complex stratums, and the problem that in actual construction, the drainage plate is bent or even broken in the driving process and cannot penetrate through soil to reach the designed depth is solved.

The invention discloses a damping element optimization method based on transmission path analysis, which comprises the following steps: S1, establishing a multi-layer transmission path analysis model, and calculating a final transmissibility matrix T'of each path point in the multi-layer transmission path analysis model under a target point vibration contribution analysis peak frequency; s2, calculating a comprehensive contribution degree Di of each path point in the multilayer transmission path analysis model under a target point vibration contribution analysis peak frequency, and extracting a corresponding key transmission path point through the comprehensive contribution degree Di; s3, the damping elements of the key transmission path points obtained in the S2 are optimized, and an optimization result is obtained; according to the method, a multi-layer transmission path analysis model is constructed, the vibration contribution amount of each transmission path in each layer of transmission path model at the maximum peak value and in the whole frequency band is calculated, and finally, through comparison of typical working condition data, a key vibration transmission path with relatively large contribution to the vibration of the driving motor is identified. Therefore, the possibility of optimizing the suspension in the design stage is provided.

The invention discloses a new energy automobile motor operation state diagnosis method, and belongs to the technical field of motor diagnosis. The method comprises the following steps: firstly, generating a vibration energy signal for a motor vibration signal, and obtaining short-scale, medium-scale and long-scale energy deviation signals through three windows with different lengths; segmenting the energy deviation signal of each scale, performing EMD decomposition, and separating out a long-term deviation component sub-signal and a local deviation fluctuation sub-signal; then respectively extracting a joint long-term deviation degree, a joint long-term fluctuation degree and a joint long-term skewness to form a long-term feature matrix, and extracting a joint local impact energy value, a joint local impact strength and a joint local impact form value to form a local feature matrix; and finally, processing the two types of normalized feature matrixes by using a double-branch fusion convolutional neural network, and outputting a motor operation state diagnosis result. According to the invention, the motor operation state characterization capability and the fault diagnosis precision are improved.

The utility model relates to a kind of starting power generation integration motor for motorcycle, including shell, base, stator core and stator winding being located in shell, rotatably arranged in the rotor core of shell, the rotor core is equipped with permanent magnet outside, the rotor core two ends are respectively connected with first rotating shaft and second rotating shaft, the stator core is fixedly connected with shell by multiple elastic support columns;The first rotating shaft is fixedly provided with first disc, multiple first fixed blocks are annularly distributed on the first disc, and a clearance slot is provided on each first fixed block;Second fixed block is provided on the second disc connected with motorcycle transmission component, a cylinder is rotatably arranged in the clearance slot, the cylinder is fixed with third disc, damping spring is provided between adjacent two third discs.The utility model solves the pain point of insufficient stability caused by motor vibration noise, significantly improves the driving experience of motorcycle and motor service life.

This invention discloses a vibration control method for an adjustable-blade axial-flow induced draft fan, comprising a center alignment component and an opening measurement component. The beneficial effects of this invention are: by using the center alignment component and the opening measurement component, the center alignment value of the coupling and the opening size of the coupling wheel can be accurately measured, thereby allowing adjustment of the center alignment allowance expansion value and optimization of the coupling wheel opening size based on the values ​​given in the manufacturer's instructions. Furthermore, by conducting a dynamic balancing test on the intermediate shaft and using counterweights to minimize the disturbance effect of the long shaft, the influence of the long intermediate shaft connecting the fan impeller and the motor is eliminated, simultaneously reducing the vibration of the induced draft fan and its motor. This ensures that the vibration of the induced draft fan reaches a qualified level under high-load conditions above 47Hz, improving the safety, reliability, and economic performance of the equipment.

The utility model belongs to the technical field of kitchen slurry treatment, and discloses a kitchen slurry filtering device which comprises a rack and a vibrating screen assembly, the rack comprises a shell and supporting legs, the shell is provided with a sealed inner cavity, a feeding port, a discharging port and a slag discharging port, and the feeding port, the discharging port and the slag discharging port are communicated with the inner cavity; the vibrating screen assembly comprises a vibrating motor, a vibrating body and a screen mesh, the screen mesh is installed on the vibrating body, the top ends of the supporting legs are provided with stretching-in parts, the stretching-in parts stretch into the shell and are elastically connected with the vibrating body through springs, the screen mesh is obliquely arranged between the feeding port and the slag discharging port, and the vibrating body is provided with a hopper-shaped discharging port. The vibrating screen assembly is mounted in the inner cavity and spaced from the inner wall of the shell, the problems that a connector of vibrating equipment is prone to leakage, abrasion and the like are solved, kitchen slurry is filtered in the sealed inner cavity, leakage of the kitchen slurry can be further avoided, and the cleanliness of the filtering device and the slurry recycling rate are improved.

1. The name of the design product: the block motor vibration module (2). 2. The use of the design product: used for installation on the simulation racing pedal or other products, receiving data in the game to produce vibration to remind the user. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

A kind of unmanned aerial vehicle motor vibration suppression circuit, the vibration data of multiple motors are respectively collected by multiple vibration sensors, and the data transmission is transmitted to single-chip microcomputer synchronously, after the algorithm process of multiple sensor fusion→kalman filtering→LSTM prediction→self-adaptive PID in single-chip microcomputer, the PWM control signal capable of inhibiting vibration is output to multiple electronic speed regulators of brushless, to regulate and control the rotating speed of multiple motors respectively, and the rotating speed of motor after regulation and control can effectively reduce the vibration of multiple motors, finally realize the motor vibration suppression effect of entire unmanned aerial vehicle, improve the flight stability, camera imaging quality and equipment reliability of unmanned aerial vehicle.

The application relates to a pole shoe mounting and positioning structure of a motor, which comprises a stator core, the stator core comprises a plurality of stator teeth, a coil is sleeved on the stator teeth, a pole shoe is mounted at the end of the stator teeth, and a plurality of insulating baffle plates are inserted into the gap between the inner circumferential surface of the coil and the side surface of the stator teeth, the two side surfaces of each stator tooth are provided with the insulating baffle plates, and the insulating baffle plates are in contact with the pole shoes; the insulating baffle plate comprises an insertion part and a baffle part, the width of the baffle part is larger than that of the insertion part, a plurality of guide inclined surfaces are formed on the insertion part, and the baffle part presses the pole shoe after the insertion of the insulating baffle plate is completed. Compared with the prior art, the opening of the stator slot is reduced in the mounting of the pole shoe, torque fluctuation is reduced, tooth slot torque is reduced, radial force fluctuation is reduced, and the motor NVH performance is improved; the simple and low-cost insulating bamboo stick can make the coil winding firm, fill the gap, increase the insulation reliability, and prevent the pole shoe from slipping due to the motor vibration.

The self-cleaning type livestock breeding trough comprises a supporting base and a feed trough body, the upper end of the interior of the supporting base is rotationally connected with the middle of the feed trough body, the bottom of the feed trough body is slidably connected with a moving shaft driven by a power assembly to move, and guide bases are arranged in the middles of the left inner side wall and the right inner side wall of the supporting base; guide grooves are formed in the middles of the guide seats, the right ends of the two guide grooves are horizontally arranged, the left ends of the guide grooves are obliquely arranged upwards from right to left, the two guide grooves are slidably connected with the moving shaft, a baffle is rotatably connected to the right end of the feed trough body, and a connecting rod assembly for controlling the baffle to be automatically opened is arranged at the front end of the supporting seat. A vibration motor is arranged in the supporting base, the input end of the vibration motor is electrically connected with the output end of an external controller, and the self-cleaning type livestock breeding trough can be automatically cleaned, so that the labor burden of breeding personnel is greatly relieved.

The utility model relates to the technical field of magnetic powder collection of magnetic powder flaw detectors, and discloses a magnetic powder collecting device for magnetic powder flaw detection, which comprises a collecting bin, and four connecting columns are fixedly connected to the top of the collecting bin. According to the magnetic powder collecting device for magnetic powder inspection, through the arrangement of the screening mechanism, when the magnetic powder collecting device is used, magnetic powder falls into a collecting bin, a vibration motor on one side of the collecting bin is started, the vibration motor drives a screen in the collecting bin to vibrate, and the magnetic powder falling onto the surface is screened through the screen; according to the magnetic powder screening device, impurities and particles mixed in magnetic powder are blocked on the surface of the screen, the screen is installed in an inserted connection mode, the two handles can be pulled upwards to take out the screen from the interior of the collecting bin, workers can conveniently and regularly clean the impurities and the particles on the screen, and therefore the effect of screening the magnetic powder is achieved; workers do not need to manually remove in the later period, and the operation steps are reduced.

This utility model discloses a vibrating screen for spreading materials in an electrostatic separator, including a mounting frame, a vibrating frame, and an electrostatic separator disposed above the vibrating frame. A screen plate is disposed inside the vibrating frame to divide the inner side of the vibrating frame into a vibrating chamber and a vibrating separation chamber. The vibrating frame and screen plate are inclined downwards from right to left. A vibrating motor is disposed on the lower side of the vibrating frame. A material conveying device is mounted on the inlet of the vibrating frame. A first discharge cylinder and a second discharge cylinder are respectively connected to the left side of the vibrating separation chamber and the vibrating chamber. Two collection frames are disposed on the left side of the mounting frame. The upper parts of the two collection frames are respectively connected to a first receiving pipe and a second receiving pipe, which are located directly below the first and second discharge cylinders. A storage frame is inserted into each of the two collection frames. A pushing component is disposed inside the vibrating frame for pushing out residual materials from the vibrating chamber and the vibrating separation chamber. This utility model has the advantage of facilitating material collection.

The application discloses a kind of electric bus active suspension control method and system, method includes according to bus parameter and motor distribution establishes the half vehicle dynamics model of bus, constructs the state space equation of model, obtains the active suspension model suitable for bus;Considering the mass distribution change and centroid position change caused by bus passengers getting on and off and walking in the car, a social force model is established;And through the social force model, the relationship between the number of passengers on the bus and the front and rear distribution of passengers is obtained according to the particle swarm optimization algorithm, the passenger distribution law is obtained, and the active suspension model suitable for mass distribution change and centroid position change is established after the range of uncertain parameters is determined;For the direct interference of rear motor vibration, PID control is designed to adapt to the vibration of motor under different working conditions;By deriving the theorem of H2 / H ∞ control, the active suspension feedback control law when the mass distribution changes and the centroid position changes is obtained.The application can effectively improve the comfort of bus.

The utility model provides a condensed aerosol fire extinguisher raw material filtering device, which comprises an upper splicing tank body, a lower splicing tank body, a filter screen and a servo motor, bending seats are symmetrically fixed on the left side and the right side in the upper splicing tank body through bolts, and longitudinal sliding rods are longitudinally fixed on the front sides and the rear sides of the upper ends of the two bending seats; the lower ends of the exteriors of the multiple longitudinal sliding rods are sleeved with first springs, the filter screen is horizontally located in the upper splicing tank body and slidably arranged in the middles of the exteriors of the multiple longitudinal sliding rods in a sleeving mode, and the design solves the problems that an original device only adopts a vibration motor to prevent blocking treatment, but only accumulated raw materials can be scattered through vibration only by means of the vibration motor; in order to solve the problems in the prior art that blocking raw materials in filter screen holes cannot be effectively cleaned, the hidden cleaning structure is designed, the blocking raw materials in the filter screen holes can be effectively cleaned, the hidden cleaning structure is used in cooperation with vibration of a vibration motor, accumulated raw materials can be dispersed through vibration, and the follow-up filtering effect of the raw materials of the hot aerosol fire extinguisher is guaranteed.

The utility model relates to the technical field of feeding mechanisms, in particular to a packaging bag feeding mechanism which comprises an installation frame, a vibration structure is arranged on the installation frame and comprises a sliding plate, the sliding plate is connected to the installation frame in a sliding mode, a guide rod is fixedly connected to the installation frame, the sliding plate is connected with the guide rod in a sliding mode, and the sliding plate is connected with the guide rod in a sliding mode. A spring is fixedly connected between the sliding plate and the mounting frame, and a vibration motor is mounted on the sliding plate; when the vibration motor is started, the sliding plate can continuously move up and down and is in sliding fit with the guide rod when the vibration motor operates, the sliding plate can slide more stably due to the arrangement of the guide rod, meanwhile, the sliding plate and the spring are mutually matched to generate vibration, and the vibration can enable packaging bags to generate tiny relative movement, so that the adhered parts are effectively damaged; the packaging bags are separated from one another, good conditions are created for the bag taking unit to accurately take out the single packaging bag, and therefore the bag taking efficiency is improved.

This invention provides an electric motor, an electric power steering system, and a vehicle. The motor includes a stator core, a rotor core, and an air gap. The rotor core is located inside the stator core, and the air gap is located between the rotor core and the stator core. The axial height Ls of the stator core, the outer diameter Dso of the stator core, the stator split ratio k of the stator core, the axial height Lr of the rotor core, and the width lg of the air gap satisfy the following: This application optimizes the dimensional relationship between the stator core, the rotor core, and the air gap between them. Without increasing the number of components, it effectively solves the problem of motor performance degradation caused by end magnetic leakage, thereby reducing cogging torque, suppressing torque pulsation, increasing the average torque of the motor, and improving motor vibration and noise. While ensuring motor performance, it can minimize motor weight and reduce production costs.

The invention discloses an agricultural machinery equipment driving motor fault diagnosis method and system based on signal collaborative analysis, and belongs to the technical field of bearing fault diagnos.The method comprises the steps that a motor vibration signal is subjected to multi-stage preprocessing, the vibration signal is converted into a cochlea graph, and the preprocessed cochlea graph is obtained through preprocessing; calculating an auditory saliency map by counting effective values in the cochlea by adopting a self-adaptive cochlea saliency feature extraction method from the preprocessed cochlea to obtain a saliency feature cochlea; extracting channel level and frame level features based on the significant feature cochlea and fusing the channel level and frame level features to obtain multi-scale fusion features; and forming a fusion feature dictionary through the label samples based on the multi-scale fusion features, performing sparse representation on the test samples by using the constructed dictionary, and realizing fault diagnosis of the agricultural machinery equipment driving motor based on the sparse representation. The method has excellent diagnosis performance in a strong noise environment and a variable speed working condition, and the diagnosis robustness is remarkably improved.

The invention relates to an air tightness testing method and device, electronic equipment, a storage medium and a program product. The method comprises the following steps: acquiring an audio signal acquired by a microphone to be tested based on motor vibration; determining an audio feature of the audio signal; and determining an air tightness test result of the microphone based on the audio features. Through the method, the microphone airtightness test can be realized without blocking the microphone by an additional physical device, and the test cost is saved.

The invention discloses a crane operation stability analysis and transmission part fault diagnosis integrated device, relates to a crane detection technology, and can ensure safe and reliable operation of a crane. The invention discloses a crane operation stability analysis and transmission part fault diagnosis integrated device. A big and small vehicle bearing fault diagnosis and operation stability analysis unit is used for extracting fault vibration characteristics; the large and small vehicle track crack defect analysis unit is used for analyzing the vibration mode of the track when the wheel passes through the track to obtain the defect of the wheel track; the hoisting mechanism guide wheel defect and steel wire rope broken wire and loose strand analysis unit is used for collecting and analyzing defect characteristic signals generated when a steel wire rope passes through a guide wheel; and the hoisting machinery transmission key component fault diagnosis and analysis unit is used for realizing extraction and identification of brake fault vibration signal features, extraction and identification of gear box early fault vibration features, fault detection of crane driving motor vibration signal spectrum analysis, and identification of crane key component fault hidden dangers.

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.

The application relates to the technical field of motor manufacturing and processing equipment, in particular to a motor stator potting device, which mainly comprises a lifting rod, a cylinder seat, a clutch connecting piece, a rotary driving mechanism and a filling and potting mechanism. When working, the lifting rod drives the cylinder seat to abut against the motor stator, then the two are disconnected through the clutch connecting piece, and the lifting rod continues to go down. The linear downward displacement is converted into the power for driving the rotation of the eccentric liquid pot and the revolution of the rotating tube through the rotary driving mechanism, and the piston in the filling and potting mechanism synchronously goes down to squeeze out the glue liquid. When resetting, the piston goes up with the lifting rod to generate negative pressure to suck back to prevent glue liquid from dripping. The application only needs a single lifting power source, and positioning, revolution glue coating and extrusion glue discharge can be realized synchronously through pure mechanical linkage, the interference of multi-motor vibration on the coating track is eliminated, glue liquid dripping pollution is effectively eliminated, and the potting quality is greatly improved.

The utility model discloses a tricycle motor cover, and relates to the technical field of motor covers. An outer plate is arranged at the top end of the cover body, a plurality of reinforcing blocks are evenly and fixedly connected to the outer plate and the cover body along the circumferential side face, a shaft passing hole is formed in the middle of the cover body and penetrates through the cover body and the outer plate, at least four locking holes are evenly formed in the cover body along the circumferential side face, and a shaft fixing barrel is fixedly connected to the middle of the inner side of the cover body. A plurality of reinforcing strips are arranged between the fixed shaft barrel and the cover body, a positioning ring is arranged on one side of the cover body, and two constant pressure strip openings are formed in the positioning ring. According to the utility model, the strength structure, the connection tightness and the connection stability of the motor cover are improved, and the connection tightness of the motor cover and the shell is effectively improved, so that the end cover is prevented from vibrating at different frequencies relative to the shell when the motor vibrates; the functions of improving the structural stability of the motor shell and assisting in improving the effective operation power of the motor are achieved.

The utility model discloses a motor end cover with a heat dissipation structure, which relates to the technical field of motor accessories, and comprises an end cover body, the outer surface of the end cover body is annularly and fixedly connected with a plurality of heat dissipation fins, and the outer surface of the end cover body is provided with a cleaning mechanism matched with the heat dissipation fins. A plurality of scraping strips are arranged on the end cover body, a plurality of connecting lugs are fixedly connected to the outer surface of the end cover body in an annular array mode, mounting holes are formed in the outer surfaces of the connecting lugs, and self-locking mechanisms are mounted on the outer surfaces of the connecting lugs. The heat dissipation fins are arranged on the end cover body, dust and the like adhering to the surfaces of the heat dissipation fins can be scraped, the heat dissipation effect is prevented from being affected, through the arranged self-locking mechanism, after the end cover body is fixed, bolts can be self-locked, and the situation that the bolts are loosened due to vibration of a motor in the using process is avoided.

The utility model relates to the technical field of modified plastic particle sorting, in particular to a modified plastic particle vibration sorting device which comprises a sorting box, the upper surface of the sorting box is communicated with one end of a connecting pipe, a material distributing assembly is arranged in the connecting pipe, and the other end of the connecting pipe is communicated with one end of a discharging pipe. The other end of the discharging pipe communicates with the lower surface of a storage barrel, the upper surface of the storage barrel communicates with one end of a feeding pipe, a vibration motor vibrates to drive a mounting plate and a rubber column to vibrate, the rubber column transmits vibration to three sieve plates, modified plastic particles are sieved through the three sieve plates, and the modified plastic particles are screened through the three sieve plates. And the air cylinder drives the sliding block b and the brush to move rightwards, the brush moves rightwards to clean the modified plastic particles on the upper surface of the screen plate, and the problem that the particle sorting efficiency is obviously reduced along with the increase of blockage of meshes due to the fact that the meshes of a screen of an existing device often clamp some particles is solved.

The application discloses a motor vibration signal analysis method based on a multi-classification neural network, which comprises the following steps: obtaining the approximate period T of a signal by preprocessing the collected motor vibration acceleration signal; determining the sampling frequency f of the motor vibration acceleration signal s ; sampling the motor vibration acceleration signal at the sampling frequency f s , and acquiring the frequency spectrum information of the signal; calculating the time domain expression of the signal, and calculating the vibration displacement s of the motor according to the time domain expression; calculating the time domain index of the signal; designing a BP neural network and training the network; designing a multi-classification neural network, using the multi-classification neural network to analyze the motor vibration signal, and determining the current vibration condition of the motor. Compared with the frequency domain analysis method and the time domain index threshold method, the motor vibration condition evaluation of the application method is more simple, fast and accurate, the efficiency of the motor vibration monitoring is improved, and the safety of production is further ensured.