25 results about "Particle charge" patented technology

The invention relates to the technical field of high-voltage engineering and insulation, in particular to an artificial pollution test method in a high-voltage environment, which comprises the following steps of: firstly, constructing a target deposition distribution function and a target response set on a parameterized grid on the surface of an insulator, and combining environment boundary condition time sequence sets to form a target deposition and response data set; layered deposition of soluble pollutants and insoluble particles is carried out in a power-on state through an electrode system time-varying electric field and particle charge control, and a surface state field is collected to generate an in-situ deposition state data set. Electrical and surface responses are obtained according to segmented loading and stepped flashover tests, and a median flashover voltage is estimated, so that an electrical and physical response data set is formed; and finally, carrying out closed-loop optimization on the time-varying trajectory, the environment program and the deposition spectrum shape of the electrode system based on the dynamic model within the leakage current constraint. According to the method, configuration reproducibility, threshold estimation stability and test rapid convergence are realized.

The invention relates to a proton flow reactor for use in storing and releasing energy. In use, a slurry of storage particles in a liquid electrolyte may pass through a first half cell of the proton flow reactor. When the proton flow reactor is in charge mode, protons are bonded or otherwise attracted to the storage particles to form charged storage particles charged with hydrogen, which can hen be stored and / or transported for later use. When the proton flow reactor is in discharge mode, protons are removed from the charged storage particles to fuel an electrochemical reaction, thereby generating electricity. Alternatively, the proton flow reactor in discharge mode can be configured to generate hydrogen gas directly from the in-flowing charged carbon particles.

The utility model relates to the field of charging devices, in particular to a plastic particle charging barrel which comprises a barrel body and a support, a wide cavity and a cylindrical cavity which are communicated with each other are arranged in the barrel body, a feeding port and a discharging port are formed in the barrel body, a discharging assembly used for stirring materials in the cylindrical cavity is arranged on the barrel body, and two baffle plates are arranged on the discharging port. And hooks are fixedly connected to the two baffle plates. Due to the fact that the baffle plate with the hook and the adjusting assembly driven by the electric push rod are arranged at the discharging port, automatic control over opening and closing of the discharging port is achieved, a worker can achieve cut-off discharging of plastic particles without manually stopping feeding, the working efficiency is greatly improved, and the labor intensity of the worker is lowered. And moreover, the blocking problem caused by too many plastic particles entering the discharging opening at a time can be effectively avoided by accurately controlling the movement of the baffle plate, and the smooth discharging process is guaranteed.

The present application relates to a kind of forming grinding method for thin-walled gear, belong to the lubrication cooling technical field in grinding processing, method as follows: liquid gallium is transported to the detachable sealed gallium delivery box of electrostatic spraying module, part of liquid gallium in detachable sealed gallium delivery box enters pressurized pipeline pressurization;Part of liquid gallium enters electric field application cavity, realizes particle charging atomization under the action of electrostatic field and is sent to uniform electric field duct.Switch off control switch at the same time, after the electric field in uniform electric field duct is stable, liquid gallium in pressurized pipeline flows into uniform electric field duct.In the uniform field effect, liquid gallium in uniform electric field duct is uniformly charged atomization, and charged liquid gallium after atomization is sprayed to workpiece surface.Grinding workpiece surface, temperature control module adjusts workpiece surface temperature in real time, maintains the state of dynamic conversion between liquid gallium and solid liquid.The present application effectively solves the problem that cooling liquid is difficult to penetrate to the depth of tooth surface in thin-walled gear forming grinding, and improves the quality and efficiency of forming grinding.

The control unit of an image forming apparatus is configured to execute a first activation control for starting rotation of the photosensitive drum when a potential difference between the brush and the surface of the photosensitive drum is a first potential difference and a second activation control for starting rotation of the photosensitive drum when the potential difference between the brush and the surface of the photosensitive drum is a second potential difference. Each of the first potential difference and the second potential difference is formed such that an electrostatic force from the brush toward the surface of the photosensitive drum acts on a particle charged to a polarity opposite to the normal polarity of the toner. An absolute value of the second potential difference is greater than that of the first potential difference.

The invention provides equipment for improving the granule cleaning effect of granules, and relates to the technical field of granule cleaning. The device comprises a device body and a charge particle generating part, a particle passing process is arranged in the device body, the charge particle generating part is connected with the device body and can inject charge particles into the particle passing process, and the charge particles can act on particles in a moving state in the particle passing process. And an explosion-proof assembly is arranged in the charge particle generation part. Through the arrangement of the explosion-proof assembly, the charge particle generation part has an explosion-proof design, dust cloud explosion can be prevented, the safety performance is improved, and the production safety is guaranteed. The charge particles can act on the particles in a moving state in the particle passing process to conduct static electricity eliminating operation, so that static electricity in the particles is eliminated or reduced, the easy-to-clean performance of the particles is enhanced, and the particle cleaning effect is improved. And the whole structure of the equipment is simpler, the use is simple and easy, and the cost is lower.

The application provides a monodisperse aerosol screening device and method based on alternating electric field and ultrasonic effect, and relates to the technical field of particle screening. The device comprises a device body, wherein a charging area, a first screening area and a second screening area are sequentially arranged inside the device body along the aerosol flow direction. A thorn electrode ring is arranged near the aerosol inlet end of the charging area. Four first electrode rods are symmetrically arranged around the central axis of the first screening area. Four second electrode rods are symmetrically arranged around the central axis of the second screening area. At least one ultrasonic sound source is arranged on the side surface of the first screening area and the second screening area. A plurality of dust collection plates are arranged inside the first screening area and the second screening area for capturing free charged particles. The application effectively combines alternating electric field and sound field technology, designs layered particle charging and screening areas, and achieves the purposes of high-efficiency particle screening, high-precision particle size screening, low loss of target particle size particles and simple programmable particle screening system.

The utility model relates to a device for measuring the electric quantity of a single particle in a wind tunnel environment. The device structurally comprises a wind-sand flow simulation device and a particle collecting and measuring device below the wind-sand flow simulation device, according to the wind-sand flow simulation device, a fan is connected to a port in one side of a square-tube-shaped shell, a net plate, a rough element and a sand blocking plate are sequentially arranged in the shell in the wind coming direction, the area between the sand blocking plate and the rough element is a containing area for particles of the target type, and the periphery of the net plate is connected to the inner wall of the shell in a sealed mode. The rough element and the sand baffle are arranged on the inner bottom surface of the shell; a sand falling opening is formed in the bottom of the shell behind the sand baffle, and a lower turning cover plate is arranged on the sand falling opening; silicone oil is filled in a transparent box body of the particle collecting and measuring device, electrode plates are respectively adhered to two opposite side surfaces of the transparent box body, a camera is arranged in front of the other adjacent side surface, and the two electrode plates are connected with a high-voltage power supply. According to the utility model, by collecting a small amount of particles, the electric quantity of a single particle of a target type at a target wind speed is accurately measured.

A method for determining a charge characteristic of electrical charges of particles in a fluid stream includes directing the fluid stream containing particles through a fluid line. Then a spatially-resolved determination of a measuring field-less particle velocity in a measurement area without an electrical measuring field is performed. An electrical measuring field is applied transverse to the flow direction in the measurement area. A spatially-resolved determination of a midfield particle velocity in the measurement area is determined. At least one charge characteristic which denotes an electrostatic charge of the particles is determined from the spatially-resolved particle velocities.

The invention discloses a shot blasting mass flow high-precision on-line monitoring device and a monitoring method thereof.The device comprises double spiral electrodes and double annular electrodes which are coaxially installed, the double annular electrodes are arranged in the axial direction of a pipeline at intervals, and the particle flow speed is calculated through a cross-correlation algorithm; the double-helix electrode adopts a coaxial reverse winding structure, and the RMS value of the particle charge quantity is obtained through signal summation and average processing, so that the shot blasting concentration is inverted. According to the invention, the time domain cross-correlation speed measurement of the annular electrode and the signal amplitude statistical measurement concentration of the spiral electrode are creatively combined, and the influence of the environment humidity is compensated through the dynamic calibration model, so that the high-precision online measurement of the shot blasting mass flow is realized. Besides, the coaxial winding design of the spiral electrodes avoids monitoring errors caused by non-uniform distribution of particles in the pipeline, signal sensitivity is enhanced, the embedded humidity sensor provides real-time environment compensation, and the device is suitable for high-speed industrial shot blasting monitoring.

The invention provides a monodisperse aerosol screening device and method based on an alternating electric field and ultrasonic action, and relates to the technical field of particle screening, the device comprises a device body, and a charge region, a primary screening region and a secondary screening region are sequentially arranged in the device body in the aerosol flowing direction; a barb electrode ring is arranged at the position, close to the aerosol inlet end, of the charge area, four first electrode bars are symmetrically arranged around the center axis of the first-stage screening area, four second electrode bars are symmetrically arranged around the center axis of the second-stage screening area, and at least one ultrasonic sound source is arranged on the side face of each of the first-stage screening area and the second-stage screening area. A plurality of dust collecting plates are arranged in the first-stage screening area and the second-stage screening area and used for capturing free charged particles. By effectively combining the alternating electric field and the sound field technology, a layered particle charge screening area is designed, and the purposes of high particle screening efficiency, high-precision particle size screening, low loss of particles with target particle sizes and a simple programmable particle screening system are achieved.

The utility model provides a quantitative charge and discharge system for pollutant particles, which relates to the technical field of environmental research equipment and is characterized in that a power supply device is respectively connected with a particle charge charging device and a particle charge discharging device and is used for power supply and charge and discharge conversion; a Hall element of the particle charge charging device is arranged between two magnetic coils, and the front surface and the rear surface of the Hall element are connected with the two magnetic coils respectively so that current can be generated in the Hall element. The upper surface and the lower surface of the Hall element are respectively connected with the positive and negative charge insulating plates and are used for charging pollutant particles on the positive charge insulating plate and the negative charge insulating plate; the particle charge discharging device is used for discharging pollutant particles on the positive charge insulating plate and the negative charge insulating plate; the charge measuring device is connected with pollutant particles on the positive charge insulating plate and the negative charge insulating plate and used for monitoring the charge quantity of the particles. According to the scheme, quantitative energy charging of pollutant particles can be achieved, and therefore the accuracy of pollutant particle experimental research is improved.

The application provides an aero-engine gas path working medium detection system and a detection method thereof, which collects abnormal electrostatic particle signals through an electrostatic sensor arranged on an engine tail nozzle device, converts the abnormal electrostatic particle signals into induced voltage signals through a signal conversion device, and outputs the induced voltage signals to a data processing terminal for processing through a multi-channel high-speed acquisition device, so that the fault degree of abnormal particles is determined by calculating the root mean square value of the abnormal electrostatic signals, the sensitivity of the monitoring system is improved, the signal is amplified and filtered through the signal conversion device, the phenomenon of single gain unpredictable signal measurement range distortion caused by the change of particle charge amount due to factors such as the speed of the engine, the size of the particles, the concentration of the particles, the material of the particles and the like is avoided, and real-time monitoring of the state of the engine gas path is realized.

The present application relates to a kind of fire smoke detection method and corresponding device, belong to fire detection technical field.The method is arranged ionization charged component in the same measurement space, and particle charge collection component and particle scattering light detection component, by receiving particle charge signal Uc And particle scattering light signal Ps;Parameter Dn is obtained by calculation, then respectively compare Dn With preset ultrafine particle size determination threshold Td1, Uc With preset particle concentration alarm threshold Tp And Dn With preset micron level small particle size determination threshold Td2, then according to the judgment result output early fire alarm signal, fire alarm signal or non-fire disturbance signal.The present application does not need to distinguish different particle size when detecting ultrafine particle, obtains 0.1 micron level ultrafine particle size and concentration by calculation, simplifies charge collection structure and circuit, does not need to accurately control airflow, not only can sense early fire smoke PM0.1 Ultrafine particle, but also can detect ordinary smoke particle, and effectively removes large particle interference, significantly reduces false alarm rate.

The present application relates to the field of high-voltage engineering and insulation technology, and particularly relates to a method for artificial contamination test under high-voltage environment, which comprises the following steps: firstly, constructing a target deposition distribution function and a target response set on a parameterized grid on the surface of an insulator, and merging an environmental boundary condition time sequence set to form a target deposition and response data set; then, implementing layered deposition of soluble contaminants and insoluble particles under the electrode system time-varying electric field and particle charging control in the on-power state, collecting surface state field to generate an in-situ deposition state data set; then, obtaining electrical and surface responses and estimating a median flashover voltage according to segmented loading and stepwise flashover test to form an electrical and physical response data set; finally, based on the kinetic model, closed-loop optimization is performed on the electrode system time-varying trajectory, the environmental program and the deposition spectrum within the leakage current constraint. The present application realizes reproducible configuration, stable threshold estimation and fast test convergence.

The invention relates to the technical field of gas peelers, in particular to a small-volume gas peeler device for changing the charge form of charged particles. The gas stripper mainly aims at solving the problems that an existing gas stripper needs to increase the medium gas injection amount in order to improve the gas pressure in a stripping cavity, so that the burden of a vacuum system is too heavy, beam energy loss and quality deterioration are caused, the operation cost and the system complexity are increased, the dependence limitation of high gas amount is not broken through, and light gas is difficult to reach the gas pressure required by effective stripping. According to the technical scheme, the device comprises a stripping pipe, and the outer side of the stripping pipe is sleeved with an outer sleeve; the positioning platform is arranged at the bottom of the stripping pipe and is fixed on the inner wall of the outer sleeve; the first positioning assembly and the second positioning assembly are fixed to the inner wall of the outer sleeve. The gas pressure in the stripping cavity can be improved while the medium gas injection amount is reduced, the effective stripping requirement of light gas is met, and finally the beam transmission efficiency and quality of the serial accelerator are improved.

The utility model belongs to the technical field of sorting machines, and particularly relates to a rotary friction electrostatic sorting machine which comprises a vibration feeder, a discharging pipe is arranged at the lower end of the vibration feeder, a rotary friction particle electrified chamber is arranged at the lower end of the discharging pipe, and a high-voltage electric field sorting chamber is arranged at the lower end of the rotary friction particle electrified chamber. Four vertical cylindrical electrodes are arranged in the high-voltage electric field sorting chamber, and gaps among the four vertical cylindrical electrodes form a sorting channel. According to the electrostatic friction separation equipment, the two pairs of vertical cylindrical electrode structures are arranged in the high-voltage electric field separation chamber, so that the generated electric field is more uniform; the problem that strong electrostatic field impact may occur between high-charge particles and electrodes of the separator, so that the particles are projected into wrong compartments of the collector is solved, and necessary conditions are provided for efficient triboelectric separation of material particles.

This invention discloses a method and system for detecting the particle charge-to-mass ratio in a fluidized bed. By installing an electrostatic sensor on the reactor to acquire the electrostatic potential signal generated by particle motion, and through a series of data analyses, the accurate measurement of the particle charge-to-mass ratio within the reactor is achieved. The detection method and system proposed in this invention are simple, safe, and environmentally friendly, suitable for online monitoring in industrial production processes, and beneficial for ensuring the stable operation of industrial reactors. Compared with existing particle charge-to-mass ratio detection technologies, it is more sensitive, accurate, and has a wider range of applications.

This invention provides a method for detecting abnormal particle parameters based on probe arrays, applicable to fault monitoring and electrostatic detection in heavy-duty gas turbines. The method includes: uniformly arranging multiple electrostatic probe arrays on the inner wall of a metal gas pipeline, wherein each electrostatic probe array is connected to an electrostatic detection terminal; when particles are present in the metal gas pipeline, the electrostatic probe arrays capture the particles, and the time-domain electrostatic signals induced by the electrostatic probes in each array are transmitted to the electrostatic detection terminal for signal fusion and enhancement processing to obtain an enhanced signal dataset; based on the enhanced signal dataset, charge quantity fitting and velocity linear fitting are performed respectively to obtain linear fitting formulas for particle charge quantity and particle velocity, which can achieve real-time high-precision inversion of the charge quantity, velocity, and position of abnormally charged particles in the gas pipeline, and has the advantages of fast response, high accuracy, and strong anti-interference ability.

The invention relates to a control device (1, 2, 3) for supplying an electrical load (4, 5), in particular an ionizer, a particle charging device and a polarizable filter, with a high voltage. In order to simplify the diagnosis of the load connected to the control device, it is proposed that the control device (1, 2, 3) has a modulation device (2, 3), by means of which the high voltage generated by the control device (1, 2, 3) for the electrical load (4, 5) can be modulated over a wide frequency range, frequency-dependent parameters of the connected load can be detected in the control device (1, 2, 3), limit values for the frequency-dependent parameter may be stored, and the detected frequency-dependent parameter may be compared to the stored limit values for the frequency-dependent parameter.

A control device (1, 2, 3) serves to supply electrical consumers (4, 5), in particular ionizers, particle charging devices and polarizable filters, with high electrical voltage. In order to simplify the diagnosis of the consumer loads connected to the control unit, it is proposed that the control unit (1, 2, 3) has a modulating device (2, 3) by means of which the high voltage generated by the control unit (1, 2, 3) for the electrical consumers (4, 5) can be modulated in a wide frequency range, wherein frequency-dependent parameters of the connected consumer load can be detected in the control unit (1, 2, 3), limit values ​​for the frequency-dependent parameters can be stored and the detected frequency-dependent parameters are comparable with the stored limit values ​​for the frequency-dependent parameters.

The application relates to an application of an independent self-supporting graphene film as a carbon stripping film of a heavy ion accelerator. The ID / IG of the graphene film is less than 0.01, and the AB structure content is more than 90%. The structure makes the carbon film have high electric conductivity, high heat conductivity, good mechanical properties and flexibility. High electron content and long carrier total duration make particles more easily capture electrons from film atoms, change the charge state of the particles, and the generated heat is easily conducted by the carbon film, prevents the center from overheating and makes the carbon film curl and tear, and is damaged. Good mechanical properties ensure that the carbon film is not easily damaged in the use process, the flatness and appearance are not easily damaged, and a long service life is ensured.

An electrophoretic medium comprises a fluid and first, second, third and fourth types of particles (W, Y, R, B) having four different colors. The first and third particles have charges of one polarity and the second and fourth particles charges of the opposite polarity; the first particles have a greater zeta potential or electrophoretic mobility than the third particles, and the second particles a greater zeta potential or electrophoretic mobility than the fourth particles. One particle is white (W), one non-white particle (R) is partially light-transmissive, and the remaining two non-white particles (B, Y) are light-reflective. A third light-reflective particle (G) may be added to create a five particle medium.

The application discloses a carbon black granulation forming screening electrostatic separation method and equipment, and relates to the technical fields of carbon black production and particle sorting. The carbon black particles are electrified and repel each other in the electrification box, and are matched with a vibrating electrostatic screen with the same polarity as the particle charge, so that the bouncing and dispersing performance of the particles is enhanced, and the screening is more efficient. The photoelectric monitoring mechanism is used to monitor the falling state of the carbon black particles in each area of the vibrating electrostatic screen in real time, the number of particles falling in a preset time period is compared with a standard reference value, and it can be judged whether the screen is blocked and the blocked position is accurate. When the blockage is found, the electrostatic plate corresponding area is electrified to generate an opposite polarity to the carbon black particles, and the blocked particles are attracted specifically to realize accurate local unblocking. Meanwhile, unlike the traditional negative pressure unblocking method, the application avoids generating negative pressure on all screen holes of the whole screen plate, prevents new blockage, and greatly improves the screening efficiency and stability.

Apparatus, methods, and systems are disclosed for controlling a charge on a particle in a plasma chamber and for controlling a lifting force on a particle in a plasma chamber. Controlling the lifting force, F˜QE, in a plasma afterglow, is achieved using a combination of two separate potentials during the afterglow. These potentials, one for controlling the charge on the panicle and one for controlling the lifting force, are applied to one or more electrodes of the plasma chamber at different times.