640 results about "Motor vibration" patented technology

The invention discloses a low-vibration permanent magnet motor for harmonic directional suppression rotor modification and a design method thereof. The structure and size of the permanent magnet motor are determined; analyzing the electromagnetic performance of the motor, and determining the harmonic order and phase of the radial permanent magnetic flux density; analyzing the vibration characteristics of the motor, and determining the main vibration frequency of the motor and the radial force order of dominant vibration so as to determine the order of the radial permanent magnetic flux density needing to be reduced; analyzing the relationship between the air gap magnetic conductance and the magnetic flux density, and determining the order and phase to which the air gap magnetic conductance needs to be added according to the distribution of the radial permanent magnet magnetic flux density to be reduced; a compensation function is established by adding air gap magnetic conductance which is opposite to the radial permanent magnetic flux density needing to be reduced, and the shaping position and shape are determined according to the period and shape of the compensation function; and considering the torque performance and stress of the motor, and determining the shaping depth. By adopting the method provided by the invention, the specific radial permanent magnetic flux density harmonic wave can be directly reduced, the vibration response can be effectively inhibited, and the torque performance of the motor can be ensured to be unchanged.

The invention provides a vibration control method and electronic equipment, and relates to the technical field of terminals. The motor vibration parameter can be obtained by integrating the use state and the electric quantity information of the electronic equipment, self-adaptive adjustment of the vibration parameter is achieved, and the use experience of a user is improved. The method is applied to the folding screen electronic equipment and comprises the following steps: acquiring a use state of the electronic equipment; acquiring electric quantity information of the electronic equipment; and acquiring vibration parameters according to the use state and the electric quantity information. And driving the motor to vibrate according to the vibration parameters.

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 discloses a non-linear vibration detection device for a high-speed rotating viscoelastic plate, and belongs to the field of detection equipment, the non-linear vibration detection device comprises a supporting seat, an anti-vibration pad is fixedly connected to the outer surface of the upper end of the supporting seat, a supporting plate is fixedly connected to the outer surface of the upper end of the anti-vibration pad, and a control component is arranged on the upper side of the supporting seat. The control component comprises a connecting plate fixedly connected with the inner surface of the supporting plate, an adjusting rod is in threaded connection with the middle of the outer surface of the connecting plate, and a through groove is formed in the upper side of the outer surface of the adjusting rod. By arranging the control component, enabling the viscoelastic plate to rotate at the same speed and detecting and analyzing the nonlinear vibration parameters of the viscoelastic plate, an experimenter can conveniently carry out a control experiment, so that the influence of motor vibration on the vibration parameters of the viscoelastic plate can be better analyzed; and the vibration characteristics of the viscoelastic plate can be further compared, analyzed and researched, so that the detection error can be reduced to a certain extent.

The invention relates to the technical field of bearing measurement, and discloses a multifunctional measuring instrument for comprehensive precision of a rolling bearing. The driving device is mounted on the working platform and comprises a load block capable of axially moving and a motor assembly for driving the load block to rotate; the measuring device comprises a high-precision inductance measuring head for detecting the runout of the bearing to be measured and a pressure sensor for monitoring an axial load; the fixing device is a replaceable mandrel base and is used for supporting an inner ring or an outer ring of the bearing to be detected; wherein the driving device applies an axial load to an inner ring or an outer ring of a to-be-measured bearing through the load block and drives the to-be-measured bearing to rotate, the measuring device synchronously collects bounce and load data of the to-be-measured bearing, the brushless motor and the load block are connected through the magnetic coupling, and the centering error of the mechanical coupling is eliminated. Meanwhile, motor vibration is prevented from being transmitted to the to-be-tested bearing, the pushing force air floating shaft sleeve actively counteracts the magnetic attraction force, and the stability of the load applied to the to-be-tested bearing is remarkably improved.

The invention discloses an intelligent power regulation system and method for a power distribution cabinet, and relates to the technical field of power regulation of the power distribution cabinet, and the method comprises the steps that a multi-source sensing unit carries out the early warning of harmonic overrun and local overheating risks in advance according to the collected three-phase current, three-phase voltage and harmonic components, and a temperature distribution matrix and external data generated by a thermal infrared imager; the edge prediction unit operates the LSTM-CNN-GRU hybrid neural network model to generate a future load prediction value, and stabilizes the voltage in advance; and the impedance self-adaptive execution unit enables the vibration value of the motor to be within a safety threshold value through the capacitor bank with the reconfigurable topology, the threshold value trigger type active filter and the tap switch controller according to the received optimization instruction.

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 relates to the technical field of motor diagnosis, and discloses a motor fault diagnosis method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining motor vibration noise big data; correlation analysis is carried out on the vibration noise big data, and parameters causing motor vibration noise faults and parameters of qualified motor vibration noise are screened out; obtaining a vibration noise data set containing the fault data set and the qualified data set; training a preset AI model based on the vibration noise data set to obtain an AI vibration noise diagnosis model; and acquiring a real-time vibration noise data set of the motor, and performing motor vibration noise fault diagnosis based on the real-time vibration noise data set and the AI vibration noise diagnosis model, so that a root cause of the motor vibration noise fault and a method for solving the problem can be directly given.

The invention discloses a unipolar motor based on magnetic pole modulation and harmonic slot collaborative optimization, which comprises a unipolar rotor punching sheet, the peripheral surface of the unipolar rotor punching sheet is provided with alternate first magnetic poles and second magnetic poles, the polarities of the first magnetic poles and the second magnetic poles are opposite, the periphery of the first magnetic poles is provided with a first arc, and the periphery of the second magnetic poles is provided with a second arc. The periphery of the first magnetic pole is provided with a first arc, the periphery of the second magnetic pole is provided with a second arc, the first arc and the second arc are concentrically arranged relative to the center of the unipolar rotor punching sheet, and the radius of the first magnetic pole is greater than that of the second magnetic pole, so that the air gap magnetic resistance is increased and the motor efficiency is ensured under the condition that the effective area of the air gap magnetic flux is not obviously changed; the amplitude of each order harmonic electromagnetic radial force caused by a rotor magnetic field is reduced, and the purpose of reducing the vibration noise of the motor is achieved. The motor has wide application prospects in the fields of new energy automobiles, aerospace, numerical control machine tools and the like, and the comfort and high-end quality of products can be effectively improved.

The present invention relates to a brushless motor controller fault diagnosis method, comprising the following steps: Step S1, diagnosing whether inverter circuits Q1, Q2, Q3, Q4, Q5, and Q6 are short-circuited; Step S2, diagnosing whether inverter circuit Q1 is controllable; Step S3, diagnosing whether inverter circuit Q3 is controllable; Step S4, diagnosing whether inverter circuit Q5 is controllable; Step S5, diagnosing whether inverter circuit Q2 is controllable and whether motor phase lines U and V are open-circuited; Step S6, diagnosing whether inverter circuit Q4 is controllable and whether motor phase lines V and W are open-circuited; Step S7, diagnosing whether inverter circuit Q6 is controllable and whether motor phase lines U and W are open-circuited. The present invention also provides a diagnostic device for implementing the diagnostic method. The diagnostic method proposed in the present invention completes the diagnosis before the motor is started. Regarding detecting whether the MOSFET is short-circuited, the present invention does not cause impact on the MOSFET, reduces motor vibration, and improves system reliability and diagnostic stability.

The invention provides a motor driving method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a driving signal parameter of a driving signal corresponding to a current vibration period, and determining a driving stage of the current vibration period and a detection stage of a continuous driving stage; in the driving stage of the current vibration period, driving the motor to vibrate according to the driving signal, and in the detection stage of the current vibration period, obtaining the back electromotive force of the motor corresponding to the current vibration period; and according to the back electromotive force of the motor corresponding to the current vibration period, obtaining the driving signal frequency of the to-be-executed vibration period, and obtaining the driving stage of the to-be-executed vibration period and the detection stage following the driving stage. Through a real-time asynchronous closed-loop control mode, dynamic adjustment of driving signal parameters is realized, and the stability of motor vibration can be maintained when an external load changes.

The invention provides an intelligent control method and system for an induction bundle bag garbage can. According to the method, firstly, the spatial gradient of infrared data of a bag opening is improved through an optical enhancement assembly to generate an annular temperature distribution diagram; dividing urgent and slow levels based on the standing distance of the user, and dynamically intercepting a time domain analysis window; establishing a correlation mapping library of the plastic bag material thickness, the historical failure record and the palm acceleration; after an environment temperature compensation annular graph is combined, a rule decision module outputs a deformation risk index; according to the index and the acceleration peak value, reconstructing a barrel cover damping response function to execute anti-wrinkle opening and closing; and the tension distribution closed-loop correction damping function of the bundle ring is reversely deduced through the vibration characteristics of the motor, so that the anti-wrinkle closed-loop control of the bag opening is realized. Through closed-loop cooperation of infrared space gradient strengthening, user behavior grading response and tension real-time feedback, self-adaptive anti-wrinkle control over the garbage bag opening in the opening and closing process is achieved.

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 invention relates to the technical field of motor testing, and discloses a new energy automobile motor testing device which comprises a base, an equipment box is installed on the base, performance testing equipment is arranged in the equipment box, the performance testing equipment is connected with an input shaft, the new energy automobile motor testing device further comprises a testing table, and a connecting frame is installed on one side of the testing table; a connecting cylinder is rotationally arranged in the connecting frame; according to the invention, the power of the output shaft of the motor can be stably transmitted to the input shaft of the performance test equipment through the self-adaptive transmission assembly, so that the power transmission between the motor and the input shaft is not affected by the bumping of the motor, and the performance test equipment can carry out precise test in the motor bumping simulation test process. In addition, in the process that the jolting assembly drives the motor on the test board to jolt up and down, the jolting assembly can test the performance parameters of the output shaft of the motor when the load exists through the weight of structures such as the test board and the like.

The invention relates to the technical field of motor test equipment, in particular to a test device for isolating generator vibration and a use method thereof. In order to solve the problems of insufficient external vibration isolation, structural adaptability, working condition adjustment flexibility, data acquisition precision and the like in the prior art, the invention provides the following technical scheme that the device comprises a base, a supporting platform is mounted above the base, a generator set is mounted at the top of the supporting platform, and a motor is mounted in the lower part of the supporting platform; a transmission shaft for connecting the motor and the generator set is arranged between the motor and the generator set; the supporting platform comprises a lower support in threaded connection with the base, and the lower support is fixedly connected with a plurality of sets of organic glass plates which are oppositely arranged through threads. External vibration interference can be effectively isolated, data accuracy is improved, the device is simple in structure and convenient to mount, adapts to different types of generators, can flexibly adjust working conditions, realizes integration of data acquisition and analysis, is wide in application scene, and improves test efficiency and reliability.

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.

A field of electric drive devices and electric machines, such as electric motors and electric generators for industrial applications, and more particularly to a method, an arrangement and a frequency converter for controlling lateral vibration of an electric machine. The arrangement of the present invention for controlling lateral vibration of an electric machine includes a frequency converter, one or more vibration sensors and an electric machine, wherein the one or more vibration sensors is / are arranged for measuring the lateral vibration from the electric machine and for producing measured vibration data; and wherein the frequency converter is arranged for generating a control torque for exerting the control torque on the stator of the electric machine, the control torque being determined utilizing the measured vibration data.

The invention relates to the technical field of motor control, and discloses a bearingless composite rotor cage type asynchronous motor vibration real-time compensation control method, which comprises the following steps: acquiring and preprocessing a rotor displacement signal to obtain a filtered displacement signal; processing the filtered displacement signal based on a second-order generalized integrator, and extracting a fundamental frequency harmonic component synchronous with the mechanical angular velocity of the rotor; adopting a simplified LMS algorithm to dynamically optimize the amplitude weight and the phase weight of the compensation force, and generating a feedforward compensation force according to the optimized weights; a two-channel control framework is constructed, and total control force is synthesized; the suspension force winding is driven by the inverter to generate corresponding radial suspension force, so that unbalance vibration of the rotor is counteracted; according to the invention, the second-order generalized integrator harmonic observer is adopted to realize high-precision extraction of the fundamental frequency component, and the mechanical angular velocity change of the rotor can be tracked in real time in cooperation with a frequency adaptive adjustment mechanism.

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 motor rotor defect collaborative analysis system and method based on knowledge-driven clustering, and relates to the technical field of motor rotor defect diagnosis. Comprising the following steps: S1, data acquisition: acquiring motor operation data in real time; s2, feature extraction: carrying out preprocessing and feature extraction on the motor operation data, and generating feature vectors related to motor rotor defects; and S3, a domain knowledge base is constructed, a structured domain knowledge base is established, and the domain knowledge base comprises expert experience rules, physical model constraints and historical defect data labels. According to the invention, multi-dimensional operation data of motor vibration, current, temperature and voltage are collected in real time, so that the problem of incomplete information of traditional single signal collection is avoided; accurate feature vectors are extracted through data cleaning, noise reduction and other preprocessing and time domain, frequency domain and time-frequency domain analysis, and the noise interference problem of original data 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 the technical field of medicinal material powder screening, in particular to a medicinal material powder screening machine which comprises a machine frame, a supporting plate is arranged above the machine frame, a plurality of screening hoppers are arranged on the supporting plate, vibration motors are arranged among the screening hoppers, and the vibration motors are installed on the supporting plate. Screens are arranged in the middles of the screening hoppers respectively, screening grooves are formed in one sides of the screening hoppers, the bottom ends of the screening grooves and the top ends of the screens are located on the same horizontal plane, discharging hoppers are arranged on the outer sides of the screening grooves and communicate with inner cavities of the screening hoppers through the screening grooves, and material guiding mechanisms are arranged at the bottoms of the screening hoppers. The material guiding mechanism comprises a connecting cylinder, a guiding cylinder arranged below the connecting cylinder and a bearing arranged at the top end of the connecting cylinder in a sleeving mode, the connecting cylinder is rotationally installed on the screening hopper through the bearing, and the guiding cylinder is of a circular-arc-shaped cylindrical structure. According to the medicinal material powder screening machine, the conveying direction of medicinal material powder can be conveniently adjusted, and the labor intensity of workers is reduced.

Motor-vibrator assembly for a vibrating machine having a plurality of motor-vibrators, each having a synchronous motor and at least one eccentric mass divided into two bodies fixed to two respective free ends of the shaft of the motor. The motor-vibrator assembly comprises position sensing means to sense the angular position and the angular velocity of the shafts of the synchronous motors, electronic drive devices to operate the synchronous motors and an electronic control unit, which is configured to control the electronic drive devices based on the angular positions and on the angular velocities sensed, so that the motor-vibrator assembly generates a predetermined vibratory motion.

The utility model relates to the technical field of coating machines, and discloses an anti-deviation device for a coating machine, the anti-deviation device comprises a coating roller and a U-shaped plate arranged outside the coating roller, a roller shaft is fixedly arranged in the middle of the coating roller, and the two ends of the roller shaft are rotationally connected with supports. According to the anti-deviation device for the coating machine, the distance measuring sensor and the two-way threaded rod are combined for use, the width of a material in the coating process is automatically adjusted, the distance measuring sensor can accurately measure the distance between the two limiting rings, the positions of the limiting rings are automatically adjusted according to the actual width of the material, repeated manual adjustment is not needed, and the working efficiency is improved. The adjusting precision and efficiency are greatly improved, the worm and the worm gear are combined, the self-locking function of the two-way threaded rod is achieved, the problem of self-moving of the limiting ring caused by motor vibration or coating roller rotation in the coating process is solved, the stability and consistency of the coating process are ensured, and the impurity removing pipe and the spraying holes of the impurity removing pipe are arranged, so that the coating efficiency is improved. And convenience is provided for material surface cleaning before coating.

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.

Multi-dose preservative-free ocular fluid delivery devices are provided. The fluid delivery device includes a fluid dispensing system and a fluid package for storing a liquid therein and supplying said liquid to the dispensing system. The dispensing system comprises an elongated chamber which includes a check valve which defines a frontal closure to the chamber. The valve is normally closed and hermetically seals the chamber. The dispenser includes a vibration motor that induces oscillations to the chamber and to the fluid within. The oscillations of the chamber impart momentum to the fluid stored in the chamber which in turn imparts force that cyclically opens the valve to dispense streams or liquid droplets. Fluid is dispensed only when the motor oscillates while otherwise the valve is hermetically closed.