130results about How to "High vibration frequency" patented technology

The invention relates to the technical field of vacuum pump detection, in particular to a vacuum pump rotor detection device which comprises a base, two clamping units which are symmetrically arranged left and right are installed at the upper end of the base, the clamping units are used for clamping a rotor and driving the rotor to rotate, and a detection unit is distributed in the middle of the upper portion of the base. The clamping unit is provided with a vibration unit used for vibrating a rotor, the middle part of the upper end of the base is provided with a matching unit, and the detection unit is installed on the matching unit; the device is used for detecting the wear resistance of the rotor, can apply a constant friction force to the surface of the rotor, improves the accuracy of a detection result of the wear resistance of the rotor, can simulate the condition that the end part and the middle part of the rotor are rubbed during actual work, can continuously vibrate the rotor, and improves the wear resistance of the rotor. The accuracy of a detection result is further improved.

The invention discloses a silicon carbide screening device for abrasive paper production, and belongs to the technical field of abrasive paper production equipment.The silicon carbide screening device comprises a base, a feeding mechanism, a screening mechanism, a driving mechanism and a receiving mechanism, the screening mechanism comprises a circular screening frame and a screening net fixedly installed in the circular screening frame, and an annular frame is fixedly installed at the top of the base; a fixing ring is fixedly installed on the outer side of the circular screen frame, and a plurality of connecting springs are fixedly installed between the annular frame and the fixing ring. The feeding mechanism comprises a feeding hopper, a driving motor, a mounting box and two rotating shafts, and the mounting box is fixedly mounted at the bottom of the feeding hopper. By means of the feeding mechanism, silicon carbide materials can be evenly distributed and efficiently scattered, silicon carbide is evenly distributed on the screen, the screening rate is increased, the feeding rate can be automatically adjusted according to the storage amount and the caking degree of the silicon carbide on the screen, the discharging rate is monitored in cooperation with the material receiving mechanism, and the screening efficiency is improved. And the stable screening speed can be conveniently maintained.

The invention relates to the technical field of preparation of low-carbon magnesia carbon bricks, in particular to a preparation method of a low-carbon magnesia carbon brick, which comprises the following steps: adding magnesia, graphite, carbon black, an antioxidant and a binding agent into a stirrer according to a preset proportion, uniformly stirring, and mixing to obtain pug; adding the pug into a vacuum high-pressure forming machine for layered forming to obtain a low-carbon magnesia carbon brick blank; performing heat treatment on the low-carbon magnesia carbon brick green body to obtain the low-carbon magnesia carbon brick, and performing ultrasonic detection on the low-carbon magnesia carbon bricks to determine whether the low-carbon magnesia carbon bricks have spallation and a spallation distribution mode, and determining and adjusting parameters of a high-pressure forming process of the low-carbon magnesia carbon brick blanks or adjusting parameters of a mixing process based on the spallation distribution mode, so that the quality of the low-carbon magnesia carbon bricks is improved.

The invention relates to a method for eliminating residual stress in additive manufacturing of nickel-based superalloy, and relates to the technical field of additive manufacturing materials. According to the main technical scheme, stress relief treatment is carried out in the mode that continuous pulse current treatment is applied to the additive manufacturing nickel-based superalloy, so that at least part of residual stress in the additive manufacturing nickel-based superalloy is eliminated, and the additive manufacturing nickel-based superalloy subjected to stress relief treatment is obtained. According to the method, the residual stress in the additive manufacturing nickel-based superalloy can be effectively reduced. According to the method, the internal structure state of the original alloy is not changed, meanwhile, the method is low in treatment temperature, short in treatment time, more efficient and more energy-saving, and the requirement for green and sustainable development of the current industry is met.

The utility model belongs to the technical field of lifting appliances for steam turbine overhaul, and particularly relates to a multifunctional lifting appliance for steam turbine overhaul. Comprising a cross beam, a vibrator is installed on the upper top face of the cross beam, two fixing lifting lugs are welded to the upper top face of the cross beam, a sliding groove is formed in the bottom end of the cross beam, two strip-shaped holes communicated with the sliding groove are formed in the upper portion of the cross beam, jackscrew bolts are slidably connected into the strip-shaped holes in a penetrating mode, fixing blocks slidably connected into the sliding groove are connected to the jackscrew bolts in a threaded mode, and two adjusting lifting lugs are slidably connected into the sliding groove. Four positioning plates are welded to the bottom end of the cross beam, and a plurality of positioning holes are formed in the positioning plates. According to the utility model, hoisting of a steam turbine rotor, taking-out of a partition plate and hoisting of the partition plate can be completed, the partition plate does not need to be manually knocked when being taken out, the partition plate is prevented from being damaged by manual knocking, the operation is simple, the working efficiency is high, and the safety is high.

The present invention belongs to the technical field of mechanical processing equipment, and in particular relates to a shot blasting machine, comprising: a shot blasting machine body, wherein a feeding port and a discharging port are arranged on both sides of the shot blasting machine body, and a conveying mechanism is arranged in the shot blasting machine body; a shot blasting mechanism, wherein the shot blasting mechanism comprises a shot blasting nozzle; and further comprising: a shot blasting agent baffle, wherein the shot blasting agent baffle is arranged below the shot blasting nozzle; a shot blasting agent acceleration belt, wherein the shot blasting agent acceleration belt is arranged on the right side of the shot blasting agent baffle; and a shot blasting recovery system, wherein the shot blasting recovery system is arranged in the shot blasting machine body and is located below the conveying mechanism; wherein a shot blasting output channel is formed between the shot blasting agent baffle and the shot blasting agent acceleration belt, and the present invention can meet the situation where a higher speed is required in the shot blasting operation, thereby improving the practicality of the shot blasting machine, and at the same time, the shot blasting can be effectively recycled and utilized through the arrangement of the shot blasting recovery system, thereby improving the effect of subsequent shot blasting operations.

The utility model discloses a filtering device for water-based paint production, and relates to the technical field of water-based paint production, the filtering device comprises a shell, the inner wall of the shell is provided with a vibration cleaning mechanism, the vibration cleaning mechanism comprises a support ring, the inner wall of the shell is fixedly connected with the support ring, and the top of the support ring is fixedly connected with a telescopic rod. Through the arrangement of the vibration cleaning mechanism, the filter plate can be vibrated to clean impurities attached to the surface of the filter plate, in the using process, the vibration motor is started to drive the filter plate to vibrate, in the vibration process of the filter plate, the vibration frequency of the filter plate can be higher through the contraction of the telescopic rod and the elastic force of the spring, and therefore the filter plate is more stable in vibration. According to the filter plate cleaning device, impurities on the filter plate can be cleaned more cleanly, the situation that the filter plate cannot be used normally due to the fact that the impurities on the filter plate are accumulated and blocked due to the fact that the filter plate cannot be cleaned can be avoided, normal usability of the device is guaranteed, and the cleaning efficiency of the device is higher.

The utility model discloses a PC prefabricated wall body mold closing pressing device, and relates to the technical field of PC prefabricated part machining, the PC prefabricated wall body mold closing pressing device comprises a bottom plate, a mold is arranged on the outer surface of the upper end of the bottom plate, a supporting frame is fixedly connected to the outer surface of the upper end of the bottom plate, and a first electric push rod is fixedly connected to the outer surface of the lower end of the supporting frame; the outer surface of the lower end of the first electric push rod is fixedly connected with a U-shaped frame, and the outer surface of the lower end of the U-shaped frame is fixedly connected with an annular frame. The cleaning mechanism is arranged, in the process that the pressing plate is used for pressing concrete, the rotating rod evenly applies force to the pressing plate in all directions, the forming quality of a prefabricated wall is improved, meanwhile, a first scraping plate, a second scraping plate and a scraping piece can be matched with one another to scrape the concrete attached to the outer surface of the pressing plate, and therefore the cleaning efficiency is improved. The influence on secondary use is avoided.

The invention discloses a crank guide rod transmission pneumatic needle suction type small-particle-size bean sprout seed automatic sowing device which comprises a vacuum air chamber, a swing air cylinder, a seed conveying pipe, a guide rod, a fixing frame, a pneumatic vibration seed disc and a seedling disc. The device adapts to seeds of different sizes, thicknesses and shapes, and adsorption failure or seed damage is avoided; according to the shape characteristics of irregular leaf-shaped seeds, the specific suction needle caliber, hole shape and air flow distribution are designed, the adsorption efficiency is improved, and it is ensured that the seeds can be stably adsorbed; an airflow channel is optimally designed by virtue of airflow dynamics, so that uniform acting force on the leaf-shaped seeds in the adsorption process is ensured, falling or dislocation of the seeds caused by non-uniform adsorption positions is avoided, the seeding requirements of seeds of different types, sizes and shapes are met, and the universality and the service life of equipment are improved.

The invention relates to the technical field of oil field water distributors, and discloses an eccentric water distributor and an anti-blocking assembly thereof.The eccentric water distributor comprises the anti-blocking assembly and a shell, the shell comprises an inner pipe and an upper outer pipe, a plurality of blind holes are formed in the upper surface of the inner pipe, and a vibration assembly used for generating vibration is arranged in each blind hole; a plurality of nozzles are arranged on the bottom surface of the upper outer pipe, a plurality of water spraying grooves are formed in the inner wall of the inner pipe, the inner wall of each water spraying groove is an inclined plane, and a pressure valve is arranged in each water spraying groove; through the mutual cooperation of the spray head and the water spray tank, two streams of opposite water flow can be generated, the two streams of water flow collide together, the inner wall of the cavity collapses firstly to form bubble interception, a rapid jet flow liquid column is generated in the center, and jet flow and collapse of the cavity can generate strong impact and cleaning effects on the inner wall of the cavity; therefore, the situation that after water injection is completed, part of sundries can flow back into the eccentric water distributor along with water, subsequent water is evaporated to form cakes, and a water conveying opening is prone to being blocked is avoided.

The invention discloses a food production material crusher which is convenient for unloading. The invention relates to the technical field of crushers. In the crushing process of the existing crusher, the material needs to be crushed to a certain extent, so that the material can be screened after being crushed, and the material that does not meet the crushing specification is crushed again, resulting in the inability to directly export qualified materials, which makes the unloading of materials cumbersome. The screening plate and the brush plate cooperate in vibration, and the material is screened synchronously in the unloading process, which is convenient for direct unloading and avoids workers from screening the exported materials again. At the same time, the exported materials through the brush plate are flattened in the vibration, which reduces the export speed and improves the screening effect, and at the same time reduces the dust at the unloading position when crushing dry materials.

The utility model discloses color steel plate powder coating screening equipment, and particularly relates to the technical field of metal powder coating production, which comprises a shell, a feed hopper fixedly connected to the top of the shell, a partition plate I and a partition plate II fixedly connected to the inner side of the shell, a concentration hopper fixedly connected to the inner sides of the partition plate I and the partition plate II, and a discharge hopper fixedly connected to the bottom of the shell. An outer frame is fixedly connected to the bottom of the shell, and a collecting frame is slidably connected to the inner side of the outer frame. The connecting rod, the first telescopic rod, the second telescopic rod and the fixing base are matched in a rotating supporting mode, the vibrating motor, the second positioning rod and the second spring are combined to enable the screen plate to conduct horizontal and vertical two-way composite vibration, and the vibration frequency and the screening efficiency are improved; the feeding amount is adjusted and controlled through the rotating plate, coating powder is stirred through reciprocating swing of the fixing plate and the toothed bar, the coating powder is evenly distributed on the surface of the screen plate, the initial contact area of the powder and the screen is increased, the screening speed is kept, and the stability of good screening precision is kept.

The invention provides an inlet silencing device of a turbocharger compressor, a compressor inlet is provided with a plurality of silencing cavities, a vibrating plate of a cantilever is arranged in at least one silencing cavity, at least one electrostatic driver is arranged on a vibrating path of the vibrating plate, local deformation is generated by controlling the electrostatic driver, and the compressor inlet silencing device is used for silencing the compressor inlet. The electrostatic actuator is caused to interfere with the vibration of the vibration plate. The electrostatic driver is arranged in the resonant cavity, the electrostatic driver makes contact with or is separated from the vibrating plate, so that the amplitude of the vibrating plate is changed, and the electrostatic driver and the vibrating plate can be selectively made to make contact with or be separated from each other according to the detected pressure change or noise of an outlet of the turbocharger; and the influence of synchronization impulse noise can be reduced or weakened.

The utility model provides a grouting device for mine support, which comprises a grouting pipe, one side of the grouting pipe is provided with a vibration pipe with two ends plugged, a rotating shaft is arranged in the vibration pipe, one end of the rotating shaft is connected with a transmission rod, one end of the transmission rod far away from the rotating shaft is hinged with a vibration rod, and the other end of the transmission rod far away from the rotating shaft is hinged with the vibration rod. The end, away from the transmission rod, of the rotating shaft is connected with a motor used for driving the rotating shaft to rotate. The motor is fixed to the inner wall of the vibration pipe. The vibration pipe is arranged on one side of the grouting pipe, the vibration pipe and the grouting pipe can be directly placed into a grouting hole together during grouting, vibration can be carried out in time after grouting, a vibration device does not need to be placed after the grouting pipe is taken out, convenience and rapidness are achieved, and efficiency is improved; compared with the mode that a vibration device is inserted into a grouting hole after grouting, it can be ensured that the vibration pipe is placed in a proper position, the vibration effect is good, and the grouting effect is effectively improved.

The application discloses a special stirring device for dry-mixed mortar production and relates to the technical field of building construction. The special stirring device for dry-mixed mortar production comprises a support, a roller is fixedly connected to the outer wall of the support, a motor is fixedly connected to the outer side wall of the support, a friction wheel is fixedly connected to the output end of the motor, the outer wall of the friction wheel is in contact with a transmission wheel, and the outer wall of the transmission wheel is in contact with the roller. The special stirring device for dry-mixed mortar production is used for placing mortar in the interior of a roller for mixing, reversing the roller for discharging after mixing, and then conveying water through a water inlet pipe, so that water flows uniformly through water outlet holes to be sprayed into the interior of the roller, and the purpose of uniform cleaning is achieved.

The utility model relates to a paper suction device of a paper winding machine, and relates to the technical field of papermaking equipment, the paper suction device comprises an adsorption assembly, and the adsorption assembly comprises a dust suction head, a dust suction box and a fan; the dust collection head is fixedly arranged on a support of the paper winding machine. The dust collection box is fixedly arranged on a support of the paper winding machine. The dust collection head is communicated with the dust collection box through a pipeline; an exhaust hole is formed in the dust suction box, and the exhaust hole is communicated with the interior of the dust suction box; the fan is fixedly arranged in the dust suction box and used for exhausting air in the dust suction box. The quality of the produced paper roll can be improved.

The utility model relates to a mud and stone separator which comprises two walking tracks, an adjusting and separating mechanism is arranged on the tops of the walking tracks, the adjusting and separating mechanism comprises a reinforcing rack arranged between the two walking tracks, and an engine unit connected with the walking tracks is fixedly installed on the front face of the reinforcing rack. And a chain plate feeder is fixedly mounted at the top of the reinforcing rack. According to the mud and stone separator, mud and stone can be conveyed to the multiple sets of filter plates in the heavy screen box, the vibration amplitude and the vibration frequency of the heavy screen box are increased under the action of the vibration spring set, the screening efficiency can be improved, and large-size materials such as stone and gravel flow to the discharging belt on one side; small-size materials such as mud flow to the discharging belt on the other side, the angle of the discharging belt can be changed under the action of the pulleys and the supporting rods, the discharging belt can be suitable for different scenes, the adjusting flexibility is improved, and the walking crawler belt can be driven to move through the engine unit and the control motor.

The utility model discloses building material freezing resistance detection equipment, and relates to the technical field of building material detection equipment, in particular to building material freezing resistance detection equipment which comprises a detection box, a refrigerator is arranged on the inner wall of the detection box, a refrigeration pipe is arranged at the output end of the refrigerator, and an omega-shaped pipe is connected to the outer surface of the refrigeration pipe in a sleeved mode. A first baffle is arranged on the inner bottom wall of the refrigerator; a protection box is arranged on the inner bottom wall of the detection box; a motor is arranged in the protection box; a first gear is arranged at the output end of the motor; the outer surface of the fixing shaft is sleeved with a half gear. According to the building material freezing resistance detection equipment, through the arrangement of the controller, the telescopic rod, the Y-shaped push plate, the sliding block, the first ejector rod and the second ejector rod, the building material freezing resistance detection equipment has the effect of stably clamping a building material.

The invention relates to the related technical field of anti-collision guardrail prefabrication, and discloses a construction device for concrete pouring of an anti-collision guardrail through an inverted method, the construction device comprises a shell, two semi-ring plates are symmetrically and fixedly arranged on one side of the shell, an operation table is arranged on the other side of the shell, a mold is arranged in the shell, and a vibrating assembly is arranged in the shell; one side of the movable block slides on the inclined surface of the outer side of the lower part of the mold, so that the distance between the shell and the frame body is reduced, the position of the eccentric wheel in the two semi-conical plates is changed, and the vibration frequency of the shell and the movable block is conveniently changed; the two ejector rods get close to each other to drive the two semicircular cylinders and the two semi-conical plates to get close to each other, so that the distance between the two semi-conical plates is reduced, the rolling path of the eccentric wheel is shortened, the vibration output frequency of the shell and the movable block to the mold is changed, and finally the continuously changing vibration output frequency is obtained; therefore, richer vibration waves can be output, and the vibration effect can be improved.

The invention provides a vibration platform which comprises a platform body, a bottom plate, a base, a motion assembly and an elastic assembly, the platform body is used for installing a helicopter simulator, the bottom plate and the platform body are connected and arranged at intervals in the first direction, the base is arranged on the side, away from the platform body, of the bottom plate, and the base and the bottom plate are arranged at intervals; the bottom plate is arranged on the base, the platform is arranged on the bottom plate, the moving assembly is arranged between the bottom plate and the platform, the moving assembly can drive the platform to move relative to the base, the elastic assembly is arranged between the bottom plate and the platform, and the elastic assembly is used for supporting the platform. The vibration platform has the advantages of being compact in structure, high in bearing capacity, high in response speed and the like.

The invention discloses a dry-type transformer castable powder screening machine, and relates to the technical field of powder screening, the dry-type transformer castable powder screening machine comprises a base, the base is used for fixedly supporting a screening component, a supporting frame is fixedly mounted at the edge of the top of the base, and a rotating shaft feeding guide piece is rotatably mounted at the top of the supporting frame. According to the powder screening machine for the dry-type transformer castable, due to the fact that raw materials contain a large amount of dust, part of the powdery raw materials are prone to caking, the feeding port is prone to being blocked by the large amount of the raw materials during pouring, and the raw materials are stacked in the material guiding folding pipe, vibration receiving frames are arranged on the two sides of the material guiding folding pipe; the raw materials slide downwards at the moment of dumping, so that the vibration receiving frame is impacted by the raw materials to generate displacement, the inclination angle of the vibration receiving frame is changed, the raw materials are conveniently discharged from the guide folding pipe, the surface of the vibration receiving frame is arranged to be zigzag, the zigzag structure primarily disperses the raw materials when the raw materials impact downwards and make contact with the surface of the vibration receiving frame, and the caking phenomenon in the raw materials is reduced.

This invention belongs to the field of integrated circuit equipment technology and discloses a high-damping vibration-damping base for integrated circuits, including a lower base. The integrated circuit equipment is placed inside the upper base and is centered and clamped by four first flexible square rings in the clamping assembly. When the integrated circuit equipment is used and subjected to vibration during operation, the upper base vibrates. The force on the upper base is transmitted to the second block, the second spherical rod, the elastic damper, the first spherical rod, and the first block, causing the elastic damper to extend and retract, thus mitigating the impact force generated during vibration. Since the multiple second spherical rods and the first spherical rods can move in a circular motion around the second block and the first block, when the integrated circuit equipment vibrates irregularly, the impact force generated in multiple directions of movement of the integrated circuit equipment can be mitigated, reducing the vibration frequency of the upper base relative to the lower base.

The utility model discloses a classifying screen with an automatic screen cleaning anti-blocking structure, which belongs to the technical field of classifying screens and comprises a screen plate used for screening materials, a driving unit used for driving the screen plate to rotate and a machine body used for installing the screen plate and the driving unit. The vibrator is used for providing local exciting force for the sieve plate when the sieve plate is blocked so as to increase the vibration amplitude and vibration frequency of vibration of the sieve plate, the cleaning effect of the sieve plate can be enhanced through the vibrator, the cleaning effect of the bouncing ball can be improved, automatic cleaning in the starting state is achieved, and shutdown for manual cleaning is not needed any more.

The utility model discloses a color printing carton developing solution recycling device, which relates to the technical field of color printing, and comprises a box body, one side of the box body is provided with a servo motor, the driving end of the servo motor is connected with a material guide roller, the outer wall of the material guide roller is fixedly provided with an impact assembly, the inner wall of the box body is fixedly provided with two groups of mounting rods, and the two groups of mounting rods are fixedly connected with the driving end of the servo motor. The top of each mounting rod is fixedly provided with a plurality of reset springs, a mounting plate is arranged above one group of mounting rods, and the reset springs are fixedly connected with the mounting plate. According to the paper board developing device, the paper board is comprehensively vibrated through rotation of the material guide roller and the impact assembly, the adhesive force between developing liquid and the surface of the paper board is destroyed, and the developing liquid is prevented from falling off; and the impact assembly simultaneously pushes the filter screen frame to form vibration, so that blocking points are reduced, the filtering efficiency is improved, and the requirements of the modern manufacturing industry on efficient and environment-friendly production are met.

The invention discloses a wire loss detection device for a high slot fill rate loose aluminum wire motor, which belongs to the technical field of motor manufacturing, and comprises a support box, wherein two ends of the support box are respectively connected with a feeding assembly and a discharging assembly, wherein the feeding assembly is used for feeding one by one, and the discharging assembly is used for discharging; a translation assembly is arranged on the top of the support box, wherein the translation assembly is used for driving the workpieces to move horizontally at equal intervals, and the translation assembly pushes the workpieces at the discharging position to the grinding position, pushes the grinded workpieces to the vibration position, and pushes the vibrated workpieces to the discharging assembly, so as to realize equal-interval movement of the workpieces; a discharging position stopper assembly, a grinding position limiter assembly and a vibration position limiter assembly are arranged on the top of the support box, and the discharging position stopper assembly, the grinding position limiter assembly and the vibration position limiter assembly have the same structure; through the above-mentioned method, the invention performs a simulation test on the wire package by accurate positioning, rapid grinding, and then using pneumatic vibration, thereby improving the detection rate of products with hidden damage and reducing the loss of finished products.

The invention relates to a double-acting torque driven vibration well cementation float shoe which comprises an upper connector and a lower connector. The stator assembly is in threaded connection with the upper joint and is used for changing the flowing direction of the cement fluid in the stator assembly; and the rotating assembly is rotatably connected with the stator assembly and is used for rotating on the basis of changing the flowing direction of the cement fluid to generate axial vibration and radial vibration. The accident rate of well cementation operation under complex working conditions can be reduced, and the well cementation quality is improved; meanwhile, the tool is simple in structure, stable in vibration, convenient to assemble and manufacture, long in service life and high in applicability.

The present invention relates to the technical field of screening devices, and specifically to a vibrating screening device for heavy-duty screens, comprising a frame, a walking mechanism, a chain plate feeder and a screen box, wherein the walking mechanism is installed at the bottom of the frame, the chain plate feeder is fixedly installed on the frame, the screen box is located on one side of the chain plate feeder, a receiving assembly is arranged in the screen box, the receiving assembly comprises a buffer module and a cleaning module, the buffer module and the cleaning module cooperate with each other to improve the screening efficiency, the vibrating screening device for heavy-duty screens can buffer large stones through the receiving assembly, reduce the noise and dust generated when large stones fall on the grate screening element, and optimize the construction environment, and on the other hand, can increase the distance between small stones and large stones, avoid being squeezed by large stones and stuck in the screening slot, resulting in blockage of the screening slot, and can be matched with a crushing assembly to crush stones that may be blocked, dredge the screening slot, and thus improve the screening efficiency.

This disclosure relates to the technical field of concrete transportation. One embodiment of this disclosure provides a vibratory unloading device for a concrete mixer truck, comprising: a receiving hood, an outer frame, and a sliding hopper. The sliding hopper is mounted on the outer frame, and a support column is rotatably connected to the outer frame. A vibratory discharge assembly is disposed between the support column and the sliding hopper. The vibratory discharge assembly includes a transmission groove, which is formed in the upper end of the support column. A transmission column is movably connected to the transmission groove. A connecting frame is provided at the bottom of the sliding hopper. An eccentric shaft is provided at the output end of the drive motor, and a connecting rod is rotatably connected to the transmission column via a pin. This technical solution solves the technical problem that existing vibratory unloading devices for traditional concrete mixer trucks generally use a vibratory motor as the power source. This transmission method has inherent defects such as low vibration frequency and amplitude, resulting in poor unloading effect and difficulty in meeting the unloading requirements of high-performance concrete.

The present invention discloses a vibration screening device with switchable vibration frequency, comprising a material receiving and storing seat, a bottom plate fixedly installed on one side of the material receiving and storing seat, a servo motor fixedly installed on the top of the bottom plate, a first roller fixedly installed on the output shaft of the servo motor, a fixed plate fixedly installed on the top of the bottom plate, and a first circular through hole opened on the fixed plate. The present invention realizes the function of mechanical vibration screening, and has two transmission chains. When it is necessary to screen materials with slightly larger specifications, the materials are placed on the material screen, and the first screw rod is manually tightened at this time, so that the fourth gear is meshed with the first gear, and the output shaft of the servo motor is controlled to rotate through the electronic control program, and the first conveyor belt is driven to rotate through the rotation of the output shaft of the servo motor, and the second roller is driven to rotate through the rotation of the first conveyor belt, which can achieve a certain acceleration effect, thereby increasing the swing frequency of the swing hammer and screening materials more efficiently.

The utility model belongs to the field of mobile phone display screen production, and particularly relates to an anti-vibration testing device for a mobile phone display screen. The utility model aims to provide a mobile phone display screen anti-vibration testing device capable of displaying anti-vibration strength data, which comprises a bottom shell, a variable frequency motor, a first cam, a detection box, a protective cover and the like, the variable frequency motor is mounted at the bottom in the bottom shell, and the first cam is slidably arranged at the upper part of an output shaft of the variable frequency motor; a detection box is rotationally arranged on an output shaft of the variable frequency motor, the first cam is located in the detection box and rotationally connected with the detection box, and a protective cover is rotationally arranged on one side of the detection box and clamps the detection box. According to the utility model, the force transducer can transmit the vibration force to the numerical value display screen, so that the vibration force of the mobile phone display screen can be displayed, and people can conveniently record the data of the vibration force.