1118 results about "Electromagnetic vibration" patented technology

The invention relates to a food processing machine with an electric sucking pump and a method for vacuumizing to produce foodstuff liquid. The food processing machine comprises a crushing cutter device, a machine head or a machine base, a motor, a barrel and a control circuit board, wherein the barrel is provided with a sealing device, has or does not have a heating device. An electric sucking pump is arranged on the machine head, the machine base, the sealing device, the barrel or a barrel handle of the food processing machine, the sucking port of the electric sucking pump is positioned in the barrel and above the foodstuff liquid level, the exhaust port of the electric sucking pump is communicated with the outer part of the barrel; and the electric power source of the electric sucking pump is an independent motor, an electromagnetic vibration device, a piezoelectric ceramic vibration device or the crushing cutter device of the food processing machine. A sealing mode is adopted to seal the barrel of the food processing machine, the electric sucking pump is used to pump air out of the barrel, then crushing and heating are carried out to crush and heat the foodstuff in the barrel of the food processing machine under the vacuum condition, the oxidation of the foodstuff liquid is greatly reduced and avoided for the crushing and heating processes, so the nutritive loss is reduced, and the good taste and appearance color are kept.

The invention discloses a load-bearing adjustable zero-stiffness electromagnetic vibration isolator and a control method thereof. An electromagnetic spring of the vibration isolator in the perpendicular direction is composed of three permanent magnets and two groups of controllable direct current electromagnets, two magnets have opposite polarity and generate repulsive force, and stiffness of theelectromagnetic spring can be adjusted by changing and controlling current. An electromagnetic spring of the vibration isolator in the horizontal direction is composed of two groups of symmetrically distributed electromagnetic springs, and stiffness of the electromagnetic spring can be adjusted by changing and controlling current. When the system load-bearing weight is changed, the stiffness of the perpendicular electromagnetic spring and the stiffness of the horizontal electromagnetic spring are led to meet a certain proportional relationship by adjusting and controlling current so that stiffness of the system at the balance position can be zero. When a vibration isolation device is in small vibration near the balance position, dynamic stiffness is very small, and natural frequency of the whole system is very low so that the vibration isolator can achieve wide-range frequency vibration isolation and has good low frequency vibration isolation effect. In addition, the vibration isolator is compact in structure, light in weight and convenient to control.

The invention discloses a transformer electromagnetic vibration noise calculating method based on the finite element method. The transformer electromagnetic vibration noise calculating method comprises the steps of 1, establishing a structured grid model and an acoustics grid model according to a three-dimensional geometrical model of a transformer; 2, conducting transient electromagnetic simulation on the structured grid model to obtain transient electromagnetic force waves borne by each phase winding and an iron core; 3, conducting FFT on the transient electromagnetic force waves borne by each phase winding and the iron core to obtain the frequency domain distribution of electromagnetic force borne by each phase winding and the iron core; 4, conducting harmonic response analysis on the structured grid model to obtain the vibration displacement data of nodes on the surfaces of the windings and the iron core; 5, conducting sound field calculation on the acoustics grid model to obtain the radiation noise distribution of the transformer. According to the transformer electromagnetic vibration noise calculating method, all noise influence factors are considered, and calculation results are accurate and reliable. The transformer electromagnetic vibration noise calculating method can be used for winding short circuit vibration deformation analysis and the like and can also provide method and basis for motor noise analysis.

The invention discloses a preparation method and a device of semi-solid slurry. Three processes of air current stirring, electromagnetic vibration and addition of heterogeneous nucleating agents are comprehensively utilized by the method. A graphite head with holes is connected with a hollow stirring rod, and a rotating motor drives the stirring rod to rotate through gear transmission and drives the graphite head to rotate; gas passes through a sleeve barrel and reaches the graphite head through the hollow stirring rod, and then, the gas overflows out of small holes, thereby realizing the purposes of blowing and stirring the molten metal in a rotating way; an electromagnetic vibration table can realize electromagnetic vibration on the molten metal in a crucible; the heterogeneous nucleating agents are added into the molten metal to promote further spheroidization and refinement of slurry tissues; after the molten metal is smelted, the graphite head is inserted into the molten metal for blowing and stirring the molten metal in a rotating way; and simultaneously, the molten metal is vibrated, and the heterogeneous nucleating agents are added through a powder feeding pipe, thereby preparing the semi-solid slurry with round and smooth primary grains. The prepared semi-solid slurry has the advantages of purity, no pollution, simple used equipment, easy control of process parameters, short pulping processes, small energy consumption and low cost.

The invention discloses an automatic feeding device of a plunger piston core of an automobile fuel injection pump. The device comprises a base, a circular disc type electromagnetic vibration hopper, a linear electromagnetic vibration hopper, a plunger piston core direction adjusting mechanical arm, and a sensing and detection device, wherein the circular disc type electromagnetic vibration hopper, the linear electromagnetic vibration hopper and the plunger piston core direction adjusting mechanical arm are arranged on the base; the sensing and detection device is arranged on the linear electromagnetic vibration hopper. The circular disc type electromagnetic vibration hopper comprises a circular electromagnetic vibration hopper base and a spiral material disc connected with the vibration base; the linear electromagnetic vibration hopper comprises a linear vibration base, a linear material groove connected onto the base, and a workpiece movement pneumatic assisting device mounted on the material groove; an outlet end of the spiral material disc is in butt joint with an inlet end of the linear material groove. The direction adjusting mechanical arm is adsorbed on the base by a strong magnetic gauge stand; the sensing and detection device comprises a plunger piston core direction judging optical fiber sensor, and a workpiece in-place and displacement laser sensor. According to the automatic feeding device, the automatic oriented arrangement and transmission of the automobile fuel injection pump can be realized.

The invention discloses a pin tool used for friction stir welding, which integrates an electromagnetic vibration system, an electromagnetic action system, an internal forced cooling system, a gas-shielded forced cooling system, a temperature induction system and a sealing and insulation system, and is an integrated pin tool used for friction stir welding, which has the functions of electromagnetic vibration in-situ composite electromagnetic action, forced temperature control, gas shielding and temperature detection, and a device thereof is further disclosed, and can be applied in electromagnetic vibration in-situ composite electromagnetic action friction stir welding and the preparation of ultrafine grain materials with large thickness and large area by severe plastic deformation.

The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by that the magnetic signal flux generated by the coil is closed through a bobbin body and one or more yokes, and wherein the bobbin body and the yokes are made of laminated metal sheets having good magnetic properties.

The invention discloses an accelerated endurance test method for a catalytic converter assembly of a commercial vehicle. The method comprises the steps of: collecting time domain acceleration signals by using a test track road based on a principle of same failure mode and equivalent damages; carrying out synthesis and accelerated computing to obtain an acceleration power spectral density (PSD) so as to guide an electromagnetic vibration bench to carry out a frequency domain accelerated test method of random vibration on the catalytic converter assembly. By using the method, vibration bench tests and test track road tests are correlated; because of the same failure mode and equivalent damages, the test time is greatly shortened, the endurance development cycle of a product is reduced, and the test cost is lowered; and the accelerated endurance test method has the three remarkable advantages of economy, practicability and accuracy.

The present invention relates to an electromagnetic vibrating table, comprising a table body. The table body comprises a first magnet, a first transition block, a central magnetic conducting pole, a second transition block and a second magnet, and the central magnetic conducting pole is housed by a moving coil; the table body also comprises a moving table and two frame-shape air-bearing guide rails, and the moving table can be arranged in the air-bearing guide rails in a sliding manner; the table body also comprises a drive motor and a lead screw connected with the drive motor, the lead screw is connected with a base plate, and both the leading wire and the air pipe are connected with the base plate; a grating scale is also arranged on the air-bearing guide rails, a grating read head opposite to the grating scale and a communication block connected with the grating read head are also arranged on the moving table; the communication block is connected with a controller; and the drive motor is connected with the controller signal. The invention provides an electromagnetic vibrating table with a complete peripheral device; the motor is controlled by the controller to drive the lead screw to pull the base plate to make simultaneous movement following the moving table, thereby, the subsidiary load of the air inlet pipe and the electrified lead wire does not influence the big-travel and low-frequency waveform distortion degree of the vibrating table.

A variable speed motor is disclosed. The variable speed motor includes: a main winding including first and second main windings, and an auxiliary winding including first and second auxiliary windings, wherein the main winding and the auxiliary winding are wound on a stator to form a plurality of poles; and a plurality of relays for performing a switching operation between serial / parallel connections of the first and second main windings or the first and second auxiliary windings. The variable speed motor includes: a stator on which a 4-pole winding and a 12-pole winding are wound; a plurality of tap windings connected in series to a 4-pole main winding forming 4 poles, for extending a variable range of rotation speed of the motor during a 4-pole operation mode; and a phase control circuit for varying rotation speed of the motor by controlling a phase of an input power-supply signal during a 12-pole operation mode. Therefore, the variable speed motor greatly extends the range of a variable speed of the motor, and does not require an additional drive unit for varying the motor speed, such that production costs are greatly reduced, and electromagnetic vibration noise caused by a low-speed control mode of the motor is also greatly reduced. Rotation speed of the motor is controlled by a phase control operation and a winding switching operation, such that the variable speed motor effectively controls the motor speed, and greatly reduces power consumption.

A three-component standard vibration table based on a lock type decoupling device is disclosed. The vibration table comprises: a pedestal, an X-direction electromagnetic vibration table, a Y-direction electromagnetic vibration table, a Z-direction electromagnetic vibration table and a three-dimensional vibration platform. The each electromagnetic vibration table is connected with the three-dimensional vibration platform through a motion decoupling apparatus. The motion decoupling apparatus comprises: a first frame and a second frame. The first frame and the second frame are formed by outer sides, inner sides, first connection sides and second connection sides, wherein the first connection sides and the second connection sides are located between the outer sides and inner sides. The outer sides are opposite to the inner sides. The inner side of the frame is inserted into the other frame. Minimal gaps exist between the inner side of the first frame and the inner side and the outer side of the second frame. An interval is arranged between the inner side of the second frame and the outer side of the first frame. An airflow channel is communicated with an external compressed air source. The outer side of the first frame is connected with the electromagnetic vibration tables and the outer side of the second frame is connected with the three-dimensional vibration platform. A structure is simple. Installation is convenient. A decoupling effect is good. The vibration table is suitable for a vibration calibration system.

The invention relates to a device for analyzing and testing the parameter of a vibration type pickup, which mainly comprises an interface device, a test module and an electromagnetic vibration platform provided with a standard accelerometer; only the frequency-magnitude curve parameter of a curve which is output by the electromagnetic vibration platform needs to be tested by the standard accelerometer and can be used as a relative reference standard, and the curve parameter of a pickup which is tested each time and the relative reference standard are compared and calculated to obtain the frequency-magnitude property and the sensitivity parameter of the tested pickup; and the frequency analysis degree of the invention is only restricted by the processing capacity and the memory capacity ofthe test module, a basic test condition can be achieved without combining a plurality of special test instruments, and the invention has low cost, simple debugging process and high test efficiency and can meet the requirement of mass production.

A sanding machine with a hand-held sanding unit, with interchangeable heads, connected to a base unit, containing three motors, one to provide suction of debris back through a hose, which has an inner hose containing a driver cable and self lubricating material, which allows the transportation of debris back to the base unit collection unit, connecting the base unit and hand-held unit, a second motor to power a driver cable which turns the hand-held unit, a third motor which is encased inside a collection unit, inside the base unit, which generates electromagnetic vibrations causing filters to release accumulated debris by the interaction of an inner and outer spring.

The invention relates to a semi-active frequency modulation vibration energy capturer. The semi-active frequency modulation vibration energy capturer comprises an electromagnetic vibration energy capturing component (1), a base (2), an electronic control plate (3), a frequency adjusting component (4) and a piezoelectric cantilever beam (5), wherein the electromagnetic vibration energy capturing component (1) and the electronic control plate (3) are mounted on the base (2); the electromagnetic vibration energy capturing component (1) is in electric connection with the electronic control plate (3); the electronic control plate (3) is in electric connection with the frequency adjusting component (4); the frequency adjusting component (4) is mounted at the tail end of the piezoelectric cantilever beam (5); the head end of the piezoelectric cantilever beam (5) is fixedly connected onto the base (2); the piezoelectric cantilever beam (5) is in electric connection with the electronic control plate (3). According to the semi-active frequency modulation vibration energy capturer, the inherent frequency of the piezoelectric cantilever beam is adjusted through controlling the position of a mass block at the tail end of the piezoelectric cantilever beam by induced current generated through external excitation, so that self-adaptive and semi-active frequency modulation is performed in a wider frequency domain, so as to capture more energy, control is carried out without the need of inputting external energy, and the energy capturing efficiency is relatively high.

The invention relates to a corn seed orientation method and device. The method comprises the following steps of: setting an electromagnetic vibration device and a spiral ascending channel at the top of the electromagnetic vibration device; starting the electromagnetic vibration device, and successively pouring corn seeds in a cavity surrounded by the spiral ascending channel, wherein the corn seeds move ahead along the spiral ascending channel in a vibration manner; sieving and removing the corn seeds with small diameters under the action of a sieving gap, and intercepting and sieving the over-thick and over-large corn seeds under the action of an adjusting damper; changing the corn seeds which continuously move ahead from being at a flat pose to be at an upright pose due to the orientation change of the spiral ascending channel; making the corn seeds pass three levels of footsteps jumping downward on the spiral ascending channel under the comprehensive action of the gravity, the vibration inertia force and the friction of the corn seeds, thus arranging the radicles tips of the corn seeds forward consistently; and outputting the corn seeds with the forward radicles tips and vibrating advancement, wherein the upright pose of the corn seeds is gradually changed to be in an almost horizontal pose with an angle of inclination due to the orientation change of the spiral ascending channel. The corn seed orientation method and device can be widely applied to following treatment and orientated seeding of agricultural seeds.

The invention discloses a method for computing electromagnetic force of a transformer iron core based on a finite element method. The method comprises the steps that structural parameters of a winding, the iron core and a fuel tank of a transformer are collected, and then a three-dimensional geometric grid model of the transformer is established; the three-dimensional geometric grid model is input into software, sinusoidal currents with a phase different of 120 DEG are applied to the cross section of the three-phase low voltage winding respectively, and Dirichlet boundary conditions are applied to the outer side of the structural grid model; and an instant electromagnetic field is solved by a virtual displacement method, magnetic field energy is computed, a virtual work method is used to compute instant electromagnetic force borne by the transformer iron core and the winding, FFT is conducted to the instant electromagnetic force, and frequency domain distribution of the electromagnetic force of the iron core can be obtained. The computation method disclosed by the invention is direct and convenient; electromagnetic vibration and force bearing situations of the transformer iron core can be analyzed from the perspective of energy; each influential factor on force bearing of the iron core is considered comprehensively; and computation results are accurate and reliable.

The invention relates to a full-automatic lentinus edodes stipe cutting equipment, comprising a case frame as well as a conveying mechanism, a stipe cutting mechanism and a clamping mechanism installed in the case frame, wherein a sequencing and positioning mechanism is arranged at the head top of the case frame, and is mainly composed of a vibrating hopper, a lentinus edodes track and stipe grooves; the vibrating hopper comprises a hopper body, an upper base groove is formed at the bottom of the hopper body, the upper base groove is communicated with the lentinus edodes track, at least one stipe groove for positioning lentinus edodes stipes is formed at the tail of the lentinus edodes track, the upper base groove is fixedly connected with a lower base, an electromagnetic vibration exciter is arranged on the lower base, the conveying mechanism comprises first belt pulleys arranged at the head and tail of the case frame, at least one conveying belt assembly is arranged between the first belt pulleys at the head and the tail, and the conveying belt assembly is composed of two first conveying belts. The full-automatic lentinus edodes stipe cutting equipment has the advantages that the design is skillful, the operation is simple, lentinus edodes stipes are fully automatically cut, the labor intensity is reduced, and the working efficiency is improved.

The invention discloses a high-performance micro electromagnetic vibration energy harvester easy for integrated manufacturing, which comprises a substrate, an insulating layer, a coil, electrodes, spring platforms, support seats and a permanent magnet. The harvester is characterized in that the coil is attached to a surface of the substrate, the head and the tail of the coil are respectively connected with two electrodes, the upper surface of the substrate is covered by the insulating layer, the coil is cladded inside the insulating layer, and the two electrodes are arranged on the insulatinglayer; and a plurality of support seats are attached to the upper surface of the insulating layer and are provided with the spring platforms, the spring platforms are arranged right above the coil, gaps exist between the spring platforms and the coil, and the spring platforms are fixedly connected with the permanent magnet. The invention realizes high integrated manufacturing of the harvester; atthe same time, the permanent magnet obtained by duplication via a micro die has higher thickness and magnetic property compared with a galvanized or sputtering permanent magnet material, thus vibrational energy can be more effectively converted into electrical energy.

A screening apparatus for green tea processing based on the electromagnetic vibration principle comprises a housing and an upper cover; the inner wall of the housing is provided with a slideway, a slide screen is arranged on the slideway, soft iron is arranged at the lower center of the slide screen, the inner bottom of the housing is provided with a first cavity right below the soft iron, an electromagnetic core is arranged in the first cavity, an electromagnetic coil is wound on the electromagnetic core and is electrically connected with a power supply, a plurality of first springs are alsoarranged at the inner bottom of the housing, the slide screen is positioned above the first springs, the upper portion of the housing is provided with an exhaust pipe, and the exhaust pipe is connected with a dust collector positioned outside the housing. The screening apparatus for green tea processing based on the electromagnetic vibration principle has the advantages that the dust collector sucks out dust in the housing to effectively protect body health of an operator; the slide screen is vertically vibrated through the first springs and the electromagnetic coil, and efficient screening ofgreen tea is achieved. The apparatus for green tea processing based on the electromagnetic vibration principle is reasonable in structural design and simple to operate.

The invention discloses an electromagnetic vibrating, stirring and friction-welding stirring-head and a corresponding welding method thereof. An electromagnetic vibrating device is adopted to assist electromagnetic vibration during the process of stirring, and friction-welding to lead the stirring-head to vibrate at high frequency simultaneously when the stirring-head rotates at a high speed to transfer energy to the metals in a stirring and friction area so as to lead the metals to achieve plastic state more quickly; the thermoplastic metals receive the composite effects of a friction force and the high-frequency vibrating energy during the rotating process of a stirring needle, thus being capable of effectively improving the velocity of the thermoplastic metal flow, improving the forming efficiency and quality of welding seams and being more effectively used for the welding and processing of high-melting point materials and thick boards.

The invention aims to provide a rigidity-adjustable electromagnetic vibration isolator. The structure of a spring steel sheet portion is that an outer layer of spring steel sheets and an inner layer of spring steel sheets are distributed in a bilaterally symmetrical mode and are fixed between an upper fixing plate and a lower fixing plate respectively. Damping materials are filled between the laminated spring steel sheets. The structure of an electromagnet portion is that electromagnetic coils are installed on iron cores, the iron cores are fixed on the upper inner surface and the lower inner surface of an electrician pure iron mounting rack respectively, and the electrician pure iron mounting rack provided with the electromagnetic coils is fixed to the lower fixing plate of the vibration isolator through bolts. The structure of a movable permanent magnet portion is that two adjusting bolts are fixed on the upper fixing plate through nuts respectively, two protruded circular columns are arranged on the center of the upper surface and on the center of the lower surface of a permanent magnet fixing plate, two ring permanent magnets are fixed on the upper surface and the lower surface of a middle plate through the protruded circular columns, and the fixing plate provided with the permanent magnets is connected with the adjusting bolts through the adjusting nuts. According to the rigidity-adjustable electromagnetic vibration isolator, the advantage of good stability of a passive vibration isolator and the advantage of flexible application of an active vibration isolator are integrated.

The invention discloses a quantitative particle material feeding system. The quantitative particle material feeding system comprises a stock bin, a feeding mechanism, a supplementing mechanism, a metering device and a control device. The discharging port of the stock bin is fixedly connected with the feeding port of the feeding mechanism. The feeding mechanism comprises an upper material blocking plate, a lower material blocking plate, an adjustable material blocking plate, an inclined discharging slide way and a flow adjusting mechanism on the discharging slide way, wherein the upper material blocking plate, the lower material blocking plate and the adjustable material blocking plate are arranged in the feeding channel. The flow adjusting mechanism comprises a material baffle and a motor drive mechanism of the material baffle, and the material baffle can be moved in a stepless mode. A mini-type electromagnetic vibration feeder is adopted in the supplementing mechanism and used for accurate feeding, and the feeding port of the mini-type electromagnetic vibration feeder is formed in the discharging slide way of the feeding mechanism. The metering device is a hopper-shaped metering scale, and a scale body of the hopper-shaped metering scale is provided with an independent landing support. A PLC is adopted in the control device. The quantitative particle material feeding system is suitable for moderate and small quantitative feeding of particle materials and particle materials not suitable for being extruded, and the working efficiency and the weighing precision are high. High adaptability is achieved for the size and the ration of the material particles.

The invention belongs to the field of metallurgy, and particularly relates to a steel strip feeding system of a continuous casting crystallizer. The system comprises a guiding pipe (2), an electromagnetic vibrator (3), an intermediate tank (4) and a crystallizer (7), wherein a steel strip (1) enters the electromagnetic vibrator (3) from the guiding pipe (2), and then enters the crystallizer (7); when the steel strip (1) is fed into the crystallizer (7), the electromagnetic vibrator (3) gives forced resonance to the steel strip (1) by dint of an electromagnetic effect; the guiding pipe (2) adopts an i type; an opening sealing clamp (8) is fixed in a longitudinal opening of the guiding pipe (2); and one end of the clamp (8) can rotate by surrounding a rotating shaft, and the other end of the clamp (8) is connected with a locking piece (11) via a locking notch (10). The steel strip feeding system can quickly exchange steel strips, so that continuous and smooth feeding of the steel strips in a continuous casting process is guaranteed, the vibration energy is prevented from being transferred to an opposite direction to fused masses, the traction is stable, cast metals are cooled evenly, and the feeding quantity of the steel strips is proper.

The invention discloses a demonstration instrument for a Buffon probability experiment, and mainly aims to solve the problem of influence of personal habits on an experimental result and effectively simulate Buffon probability experiment conditions by a machine instead of manual labor. The demonstration instrument comprises a bracket structure (6), a circular bottom plate (12) and a vertical cylinder (7). An electromagnetic vibration disk (1) is positioned on a hollow top plate (14) above the vertical cylinder (7). A needle scattering shaft (2) penetrates through the center of the top plate. Rotating arms (3) are arranged at the lower end of the needle scattering shaft. A rotating claw (5) is connected to the lower end of each rotating arm. The needle scattering shaft, the rotating arms, the rotating claws and the vertical cylinder form an experimental small needle running channel. A horizontal needle receiving disk (9) is arranged on the circular bottom plate (12). Small needles are scattered from the electromagnetic vibration disk, pass through the small needle running channel and fall on the horizontal needle receiving disk. The number of the small needles and the number of intersection points of the small needles with three groups of parallel lines are counted to obtain a circumference-to-diameter ratio. By the demonstration instrument, an abstract concept is embodied, andthe teaching of a probability theory is vivid and convenient to comprehend.

A spider arrangement for an electromagnetic vibrator includes an outer rim adapted for mounting to a supporting frame of the electromagnetic vibrator, an inner rim coaxially aligning with the outer rim for mounting to an induction coil of the electromagnetic vibrator, and a plurality of suspension arms radially and evenly extended from the inner rim to the outer rim to enable the inner rim to be moved axially in responsive to an electromagnetic force between the induction coil and a magnetic element. Each of the suspension arms provides a restoring force towards the inner rim for allowing the induction coil to alignedly move in a pistonic motion with respect to the magnetic element in a stable manner.

This invention relates to an electronic pen using in interactive whiteboard, including electromagnetic devices, the electromagnetic devices including oscillator circuit, which covers the electromagnetic oscillation circuit including electromagnetic oscillations of two or more components of the portfolio composition and electrical connections with the electromagnetic switch , referred to by the electromagnetic switch-off referred to the state electromagnetic oscillation circuit respectively respective electromagnetic vibration components of a combination of their respective frequency electromagnetic waves. Use this invention for Interactive Whiteboard electronic pen can make interactive presentation systems commonly used functional switching operation is simple and easy to use, and long-distance operations can be achieved.

The invention discloses an electromagnetic vibration generating device of a permanent magnet and application thereof in a vibration detection system, and relates to a device for recycling energy from mechanical vibration to realize energy utilization. The electromagnetic vibration generating device of the permanent magnet is composed of two outer cylinder end covers, a columnar hollow shaft, an inner side coil, a columnar inner cylinder, two fixed annular permanent magnets, a moving annular permanent magnet, a columnar outer cylinder and an outer side coil. According to the invention, the shortcomings that the existing vibration generating device only can collect the vibration energy in the vertical direction and the energy conversion efficiency from the vibration energy to electric energy is relatively low are overcome; the electromagnetic vibration generating device of the permanent magnet is used as a unique power supply of the vibration detection system so that the vibration detection system becomes a self-powered vibration detection system; and the self-powered vibration detection system is combined with a voltage doubling circuit, a wireless transmitting module, a wireless receiving module, a single-chip module and a personal computer, thus the inconvenience of arranging a power supply and a lead outside the traditional vibration detection device is overcome, and a worker can master the vibration conditions without arriving at the site.

The invention discloses a vibration-state on-line monitoring method of a high-voltage motor driving a conveying belt. The method is characterized by setting vibration sensors used for outputting vibration signals on each bearing seat of a high voltage motor and collecting vibration characteristic signals; establishing an electromagnetic vibration classification index caused by a high voltage motor stator abnormity, extracting a electromagnetic vibration fault characteristic caused by an uneven air gap, establishing an electromagnetic vibration classification index caused by a rotor conducting bar abnormity, extracting a mechanical vibration fault characteristic caused by imbalance, establishing a mechanical vibration classification index generated by a rolling bearing abnormity and extracting a mechanical vibration fault characteristic caused by poor high voltage motor installation and adjustment respectively; according to the collected vibration characteristic signals, through certain operation, obtaining the indexes of monitoring a high voltage motor fault and carrying out corresponding early warning. In the invention, the classification index of high voltage motor vibration diagnosis is established; electrical and mechanical failure faults of the high voltage motor are accurately forecasted; an operation state and a deterioration trend of the high voltage motor are grasped and safe operation is ensured.

The invention relates to a number counting device for large quantities of small parts, in particular to an electromagnetic vibration counting machine which is characterized in that the electromagnetic vibration counting machine includes a base, a vibration plate, an electromagnet, a discharge rail and a counting induction head; a spiral rail is arranged on the side wall of the vibration plate; the electromagnet is fixed on the central position of the base plane; a plurality groups of bakelite support bars inclined in certain degrees are arranged along the base circumference and around the center of the electromagnet; the upper ends of the bakelite support bars are fixedly connected with the bottom part of the vibration plate; the upper half iron core of the electromagnet is fixed on the bottom of the vibration plate; the spiral rail outlet on the vibration plate is connected with the discharge rail; the counting induction head is arranged on the corresponding position of the discharge port of the discharge rail. The invention aims to design an electromagnetic vibration counting machine which can automatically count batches of small parts. Compared with the prior art, the electromagnetic vibration counting machine has the advantages of saving time and labor in counting, high automation degree and counting accuracy, high discharge speed and strong counting reliability.

The invention discloses a field-circuit coupling analysis method for radial electromagnetic vibration of a motor. The method comprises the steps of a) performing calculation by utilizing a closed slotfinite element model of the motor to obtain an air-gap magnetic field of a permanent magnet; b) according to a characteristic of synchronous rotation of harmonics in the magnetic field of the permanent magnet, performing analysis; c) according to the arrangement of a motor winding, performing harmonic analysis on armature reaction magnetomotive force; d) performing FFT analysis for a magnetic field model obtained by magnetic permeance of each harmonic, and in combination with a time harmonic number and a rotation direction in the magnetomotive force, obtaining a space number, a rotation direction, an initial phase and a magnetic field amplitude value of the magnetic field of each harmonic; e) performing vector synthesis on the magnetic fields of all the harmonics obtained by analysis in the steps a)-d); f) transmitting a radial force wave acting on the surface of a stator to a yoke part through a modulation effect of stator teeth to generate vibration; and g) performing scanning analysis on a stator mode by adopting a frequency sweeping method to obtain a resonant frequency of each low order. According to the method, the locating of a source of the radial electromagnetic vibrationof the motor is more accurate; and the vibration characteristic can be quickly assessed.