165 results about "Machine vibration" patented technology

The invention discloses a rotating machine vibration protection method and system of an adaptive resonance neural network, and the method comprises the steps: collecting a millisecond vibration acceleration signal of a rotating machine through a distributed piezoelectric sensor array, obtaining the real-time working condition parameter of equipment, and generating a time-work synchronous vibration signal flow; inputting the time-work synchronous vibration signal flow into a resonance neural network, and dynamically generating a frequency domain-time varying adaptive threshold group in combination with the working condition parameters; extracting a weak impact resonance characteristic tensor by using a multi-scale resonance kernel of the resonance neural network; projecting a weak impact resonance characteristic tensor to an orthogonal fault subspace through a tensor decomposition algorithm, and separating out a decoupling fault characteristic matrix; and generating a real-time protection decision instruction set based on a comparison result of the decoupling fault feature matrix and the equipment operation historical database. According to the embodiment of the invention, the method can improve the detection sensitivity and positioning precision of a weak fault under an unsteady working condition, and achieves the real-time adaptive optimization of the vibration protection of the rotating machine.

The invention relates to the technical field of elevators, in particular to an elevator traction machine vibration reconstruction method and system based on a millimeter wave radar. The method comprises the steps that in the elevator running process, echo signals of a millimeter wave radar are collected; firstly, a continuous phase sequence is obtained through echo signals; generating a rough vibration signal in a radar sight line direction according to a phase-displacement mapping relation, calculating a physical confidence coefficient, constructing a dual-channel physical prior tensor, synthesizing a three-axis reconstruction vibration signal tensor by using a PGGN physical gating generation network, and finally performing physical rationality evaluation on the three-axis reconstruction vibration signal tensor. And adjusting the gating parameters of the anisotropic physical gating unit according to the evaluation result. On the premise that a contact sensor does not need to be installed on the surface of the traction machine for a long time, physical consistency reconstruction of the three-axis vibration signals of the elevator traction machine is achieved.

The invention relates to the technical field of vibration monitoring, in particular to a rotating machine vibration protection method and system based on particle swarm optimization, and the method comprises the steps: obtaining a corrected load torque based on a polynomial fitting temperature compensation algorithm in combination with a real-time environment temperature and a sensor output voltage, and synchronously calculating an actually measured vibration amplitude; configuring the number of variational mode decomposition layers according to the real-time rotating speed of the rotor to obtain a preprocessed vibration signal, adjusting the number of independent component analysis iterations according to the load torque, separating the preprocessed vibration signal to obtain independent vibration components, and generating a feature vector; calibrating adaptive resonance theory network parameters based on a particle swarm optimization algorithm, obtaining a normalized feature vector, calculating the similarity with a fault feature template, outputting a diagnosis result, calculating the deviation between an actually measured vibration amplitude and a normal vibration threshold, and performing compensation according to the diagnosis result and the deviation. According to the scheme, the fault diagnosis accuracy of the rotary mechanical vibration protection system is effectively improved through multi-working-condition self-adaptive diagnosis.

The invention discloses a linear friction welding machine vibration compensation control method based on iterative learning, and the method comprises the steps: collecting a vibration signal of an electro-hydraulic servo vibration system of a linear friction welding machine in a welding process, determining a vibration amplitude, frequency and vibration center deviation, and when the vibration amplitude or the center deviation exceeds a preset threshold value, starting the linear friction welding machine; the controller starts vibration compensation control; an electro-hydraulic servo vibration system model is established, the rigidity characteristic and the dynamic load change of the system are comprehensively considered, an iterative learning control law of a controller is designed, and control convergence conditions are analyzed to ensure the stability and the high efficiency of control; based on the output of the controller, the error trend of the vibration signal is predicted in real time in combination with historical iteration data, and a feed-forward control signal is generated through a feed-forward compensation mechanism to adjust the vibration signal error in advance. According to the method, the iterative learning is applied to the vibration compensation control of the linear friction welding machine, so that the precise compensation of the vibration signal is realized.

The invention belongs to the technical field of robot machining vibration suppression, and particularly relates to a two-way electromagnetic type variable-stiffness damper for suppressing robot machining vibration and a kinetic parameter optimization method of the two-way electromagnetic type variable-stiffness damper. The damper comprises an electromagnetic variable-rigidity elastic element and a connecting shaft, the electromagnetic variable-rigidity elastic element comprises a permanent magnet fixedly arranged on the connecting shaft in a sleeving mode and a solenoid coil arranged in the circumferential direction of the permanent magnet, and the solenoid coil is in sliding connection with the connecting shaft; when the solenoid coil is electrified, the generated magnetic field direction is the same as the magnetic field direction of the permanent magnet. The magnetic field intensity in the coil is changed by adjusting the input current in the coil, so that the rigidity of the damper is quickly adjusted in a large range; on the basis, a tool nose frequency response prediction model considering the influence of the additional damper is established, and according to a tool nose frequency response test result of the robot milling system under the multi-pose condition, fixed kinetic parameters of the damper are optimized.

The invention relates to the technical field of numerical control machining, and discloses an end mill tool bit parameter optimization method which comprises the following steps: step 1, collecting cutting force data, cutting temperature data and machining vibration data in a machining process in real time through a sensor group integrated on an end mill tool bit; the sensor group comprises a strain sensor, a temperature sensor and a vibration sensor; 2, the collected cutting force data, cutting temperature data and machining vibration data are subjected to wireless processing; according to the technical scheme, a closed-loop control system is constructed, the feeding speed, the cutting angle and the cutting depth are automatically adjusted according to dynamically-changed cutting force and vibration data, it is ensured that the machining process is always kept within a stable interval, the machining precision and the surface quality of a workpiece are effectively improved, and the machining efficiency is improved. Compared with the technical scheme that fixed preset parameters are adopted for machining in the prior art, the defect that the precision and quality of the workpiece are finally damaged due to process instability caused by the fact that adaptive adjustment cannot be achieved is overcome.

The vibrating screen for the vertical sand spraying machine comprises a screen frame, a screen plate, a drainage partition plate, a vibrator and a flow guide pipe, the screen plate is arranged at the bottom of the screen frame, screen holes are evenly formed in the screen frame and the screen plate respectively, and the vibrator is arranged on the outer wall of one side of the screen frame; an integral structure formed by connecting the screen frame and the screen plate is obliquely arranged, the drainage partition plate is arranged in the integral structure formed by connecting the screen frame and the screen plate, and the portions, located on the two sides of the drainage partition plate, of the screen plate are provided with a feeding position and the flow guide pipe correspondingly; an opening is formed in the side, away from the feeding position, of the drainage partition plate. The vibrating screen has the advantages that the vibrating screen is simple in overall structural design, effective separation of sand grains and sand bumps is achieved with extremely low cost, the blocking frequency of the screen plate is remarkably reduced, the noise reduction effect is greatly improved, the failure rate of a sand spraying machine is reduced, and uniformity in the sand spraying process is achieved.

The application provides an oil fume machine vibration testing device and a design method thereof, and relates to the technical field of oil fume machine vibration testing equipment. The design method mainly comprises the following steps: constructing a finite element model of the target oil fume machine vibration testing device; determining whether all the natural frequencies of the finite element model are located outside a preset motor excitation frequency range; if not, modifying the current finite element model to pass the modal checking stage; for the finite element model that passes the modal checking stage, applying a preset virtual load at the motor installation position to perform vibration simulation, and determining whether the maximum displacement is greater than or equal to a predetermined threshold; if not, modifying the current finite element model to pass the stiffness checking stage, and repeating the modal checking stage; iteratively performing the modal checking stage and the stiffness checking stage. Through the embodiments provided in the application, the oil fume machine vibration testing device designed can simulate the vibration of the oil fume machine during operation, and reduce the influence of resonance and forced vibration.

The application discloses a non-Newtonian fluid elastic auxiliary support clamp and belongs to the technical field of machining clamps. The clamp comprises a bottom plate provided with arrayed stepped mounting holes, an elastic auxiliary support assembly, a fixed support assembly and a pressing assembly. The upper section of the mounting hole is a smooth hole, and the lower section is a threaded hole; the elastic auxiliary support assembly comprises a non-Newtonian fluid medium filled in the hole, a compression spring arranged at the bottom and an elastic support nail in the shape of a stepped shaft. The fixed support and the pressing assembly are fixed in the mounting hole through threads. The application utilizes the shear thickening characteristic of the non-Newtonian fluid, and under the action of a milling impact force, the medium is instantaneously solidified to generate rigid support, thereby effectively inhibiting machining vibration and tool relief deformation of the overhanging part of a thin-walled plate part. The application has the advantages of simple structure, low cost, good universality and adaptability to multi-variety and small-batch production.

The utility model relates to tire performance test equipment technical field provides a kind of tire vibration signal mechanical filtering device, comprising: mounting base, damping material and vibration sensor mounting seat, the mounting base is fixedly installed on the wheel axle of tire high-speed endurance testing machine, vibration sensor mounting seat bottom is set in the recess on mounting base, the connecting place of vibration sensor mounting seat and mounting base is filled with damping material, vibration sensor is provided on vibration sensor mounting seat, damping material split type is set, the utility model uses mechanical filtering device, filters out the testing machine vibration signal of high frequency, so that the vibration signal of more clear and understandable expression tire is shown vibration signal, compared with traditional digital filtering signal, can filter out interference signal from source, more effectively process high-frequency impact and other abnormal signals, and mounting base, damping material and vibration sensor mounting seat are convenient for installation connection between.

The invention discloses a dry bulk cargo port rotating machine fault diagnosis method based on a Transform-KAN network, and the method comprises the steps: obtaining an original vibration time sequence signal of a dry bulk cargo port rotating machine with a marked fault type, carrying out the preprocessing of the original vibration time sequence signal, and obtaining a preprocessing time sequence signal; the method comprises the following steps: constructing a Transform-KAN fault diagnosis model, wherein the Transform-KAN fault diagnosis model comprises an input module, a Transform encoder module, a feature aggregation module and a KAN network module; taking the preprocessed time sequence signal as feature data, taking the fault type as label data to obtain a sample data set, and performing model training on the constructed Transform-KAN fault diagnosis model according to the sample data set to obtain an optimal fault diagnosis model; and inputting a to-be-diagnosed rotating machine vibration time sequence signal to the optimal fault diagnosis model so as to realize fault diagnosis of the dry bulk cargo port rotating machine. The technical problems that an existing rotating machine fault diagnosis method is low in diagnosis accuracy, poor in anti-interference capacity, difficult to adapt to harbor severe environments and the like are solved.

The application relates to the technical field of gear machining, in particular to an intelligent hole expanding device and method for gear forging, which comprises a machine base and a pressure head capable of expanding the hole of a gear workpiece, the surface of the pressure head is fixedly connected with sawteeth, further comprises a moving bracket arranged above the machine base and used for supporting the gear workpiece, the top of the moving bracket is provided with an inclined bracket matched with the gear workpiece tooth groove, one end of the inclined bracket is fixedly connected with a plurality of extension cylinders capable of extending into the gear workpiece tooth groove, the inside of the inclined bracket is provided with an oil tank storing silicon oil, the oil tank is communicated with the extension cylinders through a delivery cylinder, the outer surface of the extension cylinder is provided with flexible sheets capable of extending and abutting against the gear workpiece tooth groove, the inside of the delivery cylinder is provided with a driving assembly capable of driving the flexible sheets to extend, and one side of the inclined bracket is provided with an extending assembly capable of driving the silicon oil to flow and providing power for the driving assembly. The flexible sheets can self-adaptively extend and abut against the inner wall of the gear tooth groove to absorb machining vibration.

The invention relates to the technical field of washing machine damping, in particular to a washing machine vibration isolator and a washing machine. The washing machine vibration isolator comprises a hydraulic cylinder and a movable rod sliding in the axial direction of the hydraulic cylinder, a piston is connected to the end, located in the hydraulic cylinder, of the movable rod and is in sealed sliding connection with the inner wall of the hydraulic cylinder, and the piston divides the interior of the hydraulic cylinder into a first liquid cavity and a second liquid cavity; one end of the external pipe is communicated with the interior of the first liquid cavity, the other end of the external pipe is communicated with the interior of the second liquid cavity, and an electric valve is arranged on the external pipe; the first limiting piece and the second limiting piece are arranged at the two ends in the hydraulic cylinder respectively and are arranged in the axial direction of the hydraulic cylinder. Through cooperation of the external pipe, the electric valve and the pressure sensor, the oil flow resistance can be adjusted, and the vibration requirements of the washing machine in different operation stages are met; the vibration isolator is long in service life and wide in application range, and the operation and use effects of the washing machine can be effectively improved.

The utility model relates to a novel brick making machine vibration device, the bottom of a vibration mechanism is fixedly connected with a noise reduction protection supporting mechanism, a connecting mechanism is arranged between a vibration operation table and the noise reduction protection supporting mechanism, the noise reduction protection supporting mechanism comprises four fixing columns, four noise reduction baffles are connected among the outer surface walls of the four fixing columns in a sliding mode, and the noise reduction baffles are connected with the vibration operation table. The number of the connecting mechanisms is four, the four connecting mechanisms are connected to the four fixing columns correspondingly, the upper fixing plate is fixedly connected to the bottom wall of the vibration operation table, the upper limiting barrel is fixedly connected to the bottom wall of the upper fixing plate, the lower fixing plate is fixedly connected to the top faces of the fixing columns, and the lower limiting barrel is fixedly connected to the top wall of the lower fixing plate. Two ends of the connecting spring are respectively clamped in the upper limiting barrel and the lower limiting barrel; effective damping capacity is provided through the arranged connecting mechanism according to the elasticity of the connecting mechanism, the outer surface walls of the fixing columns are shielded and sealed through the noise reduction baffles, and the noise transmission effect is effectively reduced.

The utility model discloses a leakproof device for feeding modified plastic granules, which comprises a modified plastic granule processing machine, a feed pipe is mounted at the top of the modified plastic granule processing machine, a first mounting hose is sleeved on the outer ring of the feed pipe, a connecting pipe is fixedly mounted at the top end of the first mounting hose, and a receiving hopper is welded on the outer ring of the connecting pipe. A second mounting hose is fixedly mounted at the top end of the connecting pipe, and hose clamps are arranged on outer rings of one sides of the first mounting hose and the second mounting hose. By arranging the hose, the hose clamp, the ratchet wheel, the pawl and the like, the hose clamp is prevented from loosening due to machine vibration when a related machine is started; by arranging the first mounting hose, the second mounting hose, the hose clamp and the like, flexible connection at the connecting position is achieved, the situation that according to traditional rigid connection, when a related machine is started, vibration occurs, and consequently the connecting position is staggered is avoided, and the connecting stability is improved.

The utility model relates to the technical field of continuous casting machine vibration, and discloses a vibration device for a metallurgy continuous casting machine, which comprises a mounting base and a vibration rack, one side of the vibration rack is fixedly connected with a mounting rack, the lower end of the mounting rack is fixedly connected with a second sliding cylinder, and the periphery of the upper end of the mounting base is provided with sliding grooves. Four sliding grooves are formed in the lower end of the vibration rack, sliding blocks are slidably clamped to the inner surfaces of the four sliding grooves, buffering bent rods are rotationally connected to the upper ends of the four sliding blocks, the upper ends of the four buffering bent rods are rotationally connected with the four corners of the lower end of the vibration rack correspondingly, and first buffering springs are fixedly connected to one sides of the four sliding blocks; the two sides of the upper end of the installation base are both provided with sliding rods, and the two ends of the two sliding rods are both fixedly connected with first fixing blocks. When the device vibrates a crystallizer, force borne by the vibration rods of the device is minimized, metal fatigue of the device is relieved to the maximum extent, and the service life of the device is prolonged.

This invention provides a compound gravity separator, comprising a frame; at least two gravity platforms spaced apart vertically; wherein each pair of adjacent gravity platforms is connected by a transmission support arm; the upper end of the transmission support arm is hinged to the upper gravity platform, the lower end of the transmission support arm is hinged to the lower gravity platform, and the middle part of the transmission support arm is rotatably connected to the frame; and a drive mechanism, mounted on the frame and located around the at least two gravity platforms. The compound gravity separator provided by this invention achieves vibration of multiple gravity platforms driven by a single drive unit through a stacked arrangement and a reverse linkage design of the transmission support arms. This eliminates multiple independent drive systems, significantly reducing costs and energy consumption; utilizes the inertial cancellation principle of reverse motion to significantly reduce overall machine vibration; the stacked structure reduces the floor space compared to traditional series layouts, and the material falls by gravity, eliminating the need for intermediate lifting and conveying devices.

The invention relates to the field of machining, in particular to an angle head and main shaft connecting device with high connecting strength, comprising a power transmission module for transmitting main shaft power to an angle head; the pneumatic control module comprises a stator and a rotor which can rotate relatively, and a closed gas path is formed between the stator and the rotor through a sealing assembly, so that gas pressure is output in a rotating state; and the clamping module comprises a piston assembly controlled by air pressure, a transmission part and a clamping part, and axial movement of the piston assembly is converted into radial locking force of the clamping part through the transmission part. The gear bearing is axially positioned through the bearing baffle ring, so that an axial supporting reference is formed; the stator is fixedly connected with the protective cover, and the rotor is fixedly connected with the piston base and the output disc, so that a stable connecting frame is formed. The connection strength is greatly improved, the angle head self-weight inclination and the machining vibration are effectively eliminated, and the control precision of radial run-out is improved.

The invention relates to the technical field of power plant auxiliary equipment, in particular to a power plant auxiliary equipment vibration fault diagnosis method and system based on deep learning. Comprises: establishing a fault database of power plant auxiliary equipment; setting a fault diagnosis model and a plurality of equipment points based on the fault database, and acquiring a monitoring data packet of each monitoring point according to a preset acquisition time node; judging whether an early warning instruction is generated or not according to all the monitoring data packets and the fault diagnosis model; the method comprises the following steps of: performing structural analysis on the power plant auxiliary equipment, setting a plurality of equipment points, constructing an abnormal signal set of each equipment point by utilizing a deep learning technology, setting a corresponding processing sub-model and a global diagnosis model according to the abnormal signal set, and analyzing a time sequence association relationship among characteristic sub-signals in a single abnormal signal set to obtain a diagnosis result of the abnormal signal set. And the corresponding processing sub-model is constructed, so that the processing efficiency of the monitoring data of each equipment point and the screening efficiency of the fault signal are improved, and the fault diagnosis efficiency of the power plant auxiliary equipment is improved.

The utility model relates to a kind of power-off protection circuit applied to ironing machine, including main control module, main control module is connected with power module;Power module is equipped with protection circuit, protection circuit is connected in parallel in power input end;The input end of main control module is connected with dump switch, and the output end is connected with buzzer;If dump switch reverses, and reverse signal is transmitted to main control module, after main control module receives signal, control steam generator stops working;At the same time, main control module controls buzzer to issue alarm;The input end of main control module is connected with vibration sensor, and vibration sensor is used to monitor ironing machine vibration condition;When continuous vibration time reaches preset time threshold, main control module controls steam generator to stop working;At the same time, main control module controls buzzer to issue alarm.The utility model can realize the function of idle automatic power-off alarm and dump automatic power-off alarm, and can improve the use safety of product.

The invention discloses an opposed fin heater applied to a Stirling engine. The heater comprises a heat exchange sleeve, heat exchange fins, a pressure-bearing shell, a plurality of multifunctional adjusting blocks, a shell temperature measurement fixing column, an inner cavity temperature measurement fixing column, a column section flange and an adjusting inner core. According to the heater, opposed interfaces of the two Stirling engines are provided by adopting the symmetrically-arranged column section flanges, the two Stirling engines share a hot end working cavity, axial vibration is mutually counteracted when the two engines work at the same time, and a single-machine vibration acceleration signal can be reduced by 50%; heat generated by an external heat source is transmitted to the internal working medium through the heat exchange sleeve and the heat exchange fins in sequence; the multifunctional adjusting block can adjust the weight, the internal volume and the heat capacity of the heater by selecting different materials and structures, and therefore adjustment of parameters such as the weight, the gravity center and the thermal inertia of the heater is achieved.

The invention discloses a machine vibration energy collecting device based on a magnet-friction nanometer generator. The machine vibration energy collecting device comprises a bottom plate, a friction nanometer power generation unit, a load bearing plate, a permanent magnet and an elastic supporting plate. The first electrode is arranged on the bottom plate; the friction layer is of a flexible structure; the friction layer is provided with two oppositely-arranged load bearing plates, and one ends of the two load bearing plates are fixed to the bottom plate through elastic supporting plates correspondingly. The two load bearing plates are respectively provided with a permanent magnet, and the same-name magnetic poles of the two permanent magnets are oppositely arranged; the friction layer forms a structure with the two ends elastically supported and the middle arched upwards under the action of the elastic supporting force of the elastic supporting plate, the gravity of the load bearing plate and the gravity and repulsive force of the permanent magnets. The machine vibration energy collecting device based on the magnet-friction nanometer generator has the advantages of being simple in structure and high in power generation efficiency, and it is ensured that vibration energy is effectively and continuously captured.

The invention relates to the technical field of automatic control, in particular to an anti-falling device guide rail machining control system. The method comprises the steps that a multi-source data sensing unit collects guide rail morphology data, machining vibration data and environment data based on a multi-sensor network module, and machining state joint characterization is achieved through a Kalman filtering algorithm; the defect real-time early warning unit is used for identifying processing abnormity and size out-of-tolerance in a layered manner based on a cascade detection module, and quantifying defect risks in combination with a dynamic tolerance model so as to realize real-time early warning; the process optimization unit integrates macroscopic parameters and microscopic states based on a feature fusion module, and generates optimal cutting parameters through a self-adaptive optimization framework; the dynamic compensation control unit corrects the machining track in real time based on a path compensation module, and the critical dimension precision is ensured through a multi-objective optimization algorithm; and the quality tracing unit records process data based on the full-cycle data link module, evaluates equipment performance degradation and part life through a survival analysis model, and drives maintenance and calibration.

The application belongs to the technical field of aero-engine safety design and whole machine vibration, and provides a whole machine dynamic response analysis method after a blade fly-off of an aero-engine. When an aero-engine has a blade fly-off and other inclusive accidents, the dynamic response of the whole engine is complex and changeable, and in serious cases, the safety of the engine and even the airplane will be threatened. Therefore, the application provides a whole machine dynamic response analysis method after a blade fly-off of a high-bypass-ratio turbofan engine. The application mainly considers the influence of the collision and friction between the low-pressure rotor and the fan case after the fly-off of a large-diameter fan blade on the whole engine, and the influence of the large unbalanced rotating inertia excitation on the fulcrum dynamic load during the reduction process after the fly-off of the engine blade.

The utility model discloses a multi-step short-process anti-blocking vibrating feeder which comprises a screen box, a feeding bottom plate is arranged on the front section in the screen box, a screening section is arranged behind the feeding bottom plate in the screen box, the screening section is a step screening section arranged in a step shape, and a vibrating device is installed at the bottom of the feeding bottom plate. The two sides of the bottom of the screening section are installed on spring bases through damper springs. According to the vibrating feeder, the screening sections of the vibrating feeder are designed in a step-shaped section mode, the material screening process is shortened, and materials can flow forwards more easily in an impact mode. And meanwhile, each screening section screen seam adopts a trumpet-shaped screen seam design along the material flow direction, so that large stones clamped in the screening screen seams in the front are overturned forwards and fall off under the impact of machine vibration and forward flowing materials, the phenomenon that the blocky materials are clamped into the screen seams is reduced, and the normal operation of equipment is prevented from being influenced by material blockage.

The utility model relates to the technical field of balance blocks, and discloses a balance block capable of prolonging the service life of a washing machine, which solves the problem that the self weight of the existing balance block of the washing machine can not be adjusted according to the requirements of washing machines with different models, and comprises a balance block main body, and support blocks are fixedly arranged at four corners of the bottom of the balance block main body; a supporting plate is fixedly installed among the bottoms of the four supporting blocks, a protective shell is fixedly installed on the surface of the balance block body, a pressing plate is arranged on the upper portion in the balance block body, a plurality of balancing weights are arranged on the lower portion in the balance block body, a hand wheel is arranged on the lower portion of one side of the protective shell, and a transmission assembly is arranged on one side of the hand wheel. The transmission assembly is in transmission connection with the pressing plate. When the hand wheel rotates, power is output to the pressing plate through the transmission assembly. The washing machine balance block can adjust the weight according to the requirements of washing machines of different models, so that the abrasion of the washing machine during vibration is reduced, and the service life of the washing machine is prolonged.

The utility model belongs to the technical field of floor forming machines, and particularly relates to a floor forming machine vibration box bearing lubricating structure which comprises a vibration box body, and the vibration box body comprises a box body and a vibration assembly. The vibration assembly comprises a transmission shaft and an eccentric block assembly, lubricating oil is arranged in the box body, an open type oil channel is formed in the upper portion of the box body, a guide hole is formed in the open type oil channel, the open type oil channel is communicated with a bearing hole through the guide hole, and the open type oil channel is higher than the bearing hole. The utility model provides a bearing lubricating structure for a vibration box of a floor forming machine, which can realize lubrication of lubricating oil, and can realize real-time synchronous lubrication as long as the vibration box works, so that the timeliness of lubrication is realized, the cooling of a bearing is facilitated, and the service life of the bearing is prolonged.

This utility model provides a shock-absorbing and anti-slip device for mounting on the support legs of a washing machine. The device includes an upper shock-absorbing edge area and a lower shock-absorbing and anti-slip area. The shock-absorbing edge area has an open cavity, and a shock-absorbing component is located at the bottom of the cavity. The shock-absorbing component includes multiple buffer columns of the same height. The support legs are housed in the cavity and in close contact with the buffer columns. The shock-absorbing and anti-slip area includes a flat anti-slip layer in the middle of the bottom and a sealing protective layer on the outer perimeter of the bottom. Multiple anti-slip suction cups are located within the flat anti-slip layer, and both the suction cups and the sealing protective layer can adhere to the ground. The shock-absorbing and anti-slip device of this utility model significantly improves the shock-absorbing and anti-slip effect, effectively reducing the impact of washing machine vibration on the surrounding environment and extending the service life of the washing machine.

The invention discloses a mechanical fault diagnosis method based on a double-topological graph and a consistency representation learning network, and the method comprises the steps: obtaining a vibration signal of a rotating machine, determining a mechanical fault diagnosis model, extracting the spectral domain features of the vibration signal, inputting the spectral domain features into the mechanical fault diagnosis model, and outputting a diagnosis result; the step of determining the mechanical fault diagnosis model comprises the sub-steps of obtaining an original vibration signal of the rotating machine, extracting spectral domain characteristics of the original vibration signal of a known fault, dividing the spectral domain characteristics into n non-overlapping labeled samples, and dividing the divided spectral domain labeled samples into a training set, a verification set and a test set, the neural network model forms the mechanical fault diagnosis model through a model training stage and a model testing stage; according to the method, a traditional model training mode is changed, the problem that in an actual diagnosis scene, due to the fact that marked samples are limited, the performance of a traditional graph neural network is reduced is solved through the graph semi-supervision thought, and the effectiveness and superiority of the method are verified in two mechanical data sets containing extremely few marked samples.

The present application relates to a kind of screening machine vibration signal extraction methods based on multi-algorithm fusion, belong to the signal processing technical field of mining screening equipment, solve the problem of modal aliasing, distortion of signal decomposition in prior art. Including: collecting vibration signal;Through the SVMD algorithm after the AE-CMA-ES algorithm optimization parameter, vibration signal is decomposed into IMF modal component;The energy distribution of each IMF modal component is obtained by HHT transformation, and then the high-frequency energy proportion and instantaneous acceleration peak value are obtained. Precise decomposition of vibration signal is realized.