39results about How to "Control vibration frequency" patented technology

The invention discloses a concrete spreading and paving machinery used for building construction. The concrete spreading and paving machinery used for building construction comprises a fixing base, a piston block is connected with the inner side of a through pipe in a clamping mode, a jacking rod is connected to the top of the piston block, a material guiding plate is connected to the top of a clamping base, and mounting holes are formed in the inner side of a mounting rod at equal intervals; a mounting pipe is connected to the left side of the top of the fixing base, a movable rod is connected to the inner side of the mounting pipe in an inserting mode, a movable spring is connected to the top of the movable rod, and through holes are formed in the inner side of the movable rod at equal intervals; and the right side of a threaded rod penetrates through one of the through holes and is connected with a nut in a threaded mode, a second gear track is engaged with the left side of a transmission gear, and a brush plate is connected to the side, far away from a cleaning rod, of a compression spring. The concrete spreading and paving machinery used for building construction has the advantages that uniform discharging can be achieved during discharging of concrete and the concrete paving thickness is convenient to control, and the problem that practicability of the concrete paving machinery is reduced due to the facts that discharging of concrete is nonuniform and the concrete paving thickness is difficult to control is solved.

The invention discloses a tea stem screening device for preventing damage to tea leaves, which comprises a feeding funnel, a slide rail, a door panel, a collecting box and a support frame, the feeding funnel is located at the top of an outer casing, and the feeding funnel is connected with the screening device. The top of the device is connected, the two sides of the screening device are provided with pulleys, and the bottom surface of the screening device is provided with a hook and a fixed block, the collection box is connected with the screening device through a hook, and the fixed block is connected by The plate is connected with the eccentric wheel, the eccentric wheel is provided with a driven wheel, and the driven wheel is connected with the driving wheel through a belt, the support frame is fixed on the inner wall of the outer shell, and the connection mode of the support frame and the eccentric wheel is as follows: Bearing connection, the motor is provided with a driving wheel. The tea stalk screening device for preventing damage to tea leaves is provided with slide rails, and the shape and structure of the slide rails are "L"-shaped structures, which facilitates the up and down vibration of the screening device, and at the same time, the short side at the bottom of the slide rails can restrict the pulley from sliding out rails.

The invention discloses an insulator fatigue test device and relates to the technical field of insulators. The device comprises a first steel frame, a second steel frame, an insulator, a steel strand,a vibration device and a tensioning device. A first end of the insulator rotates relative to the first steel frame, a second end of the insulator is fixed to a first end of the steel strand, a secondend of the steel strand is fixed to the second steel frame, the steel strand penetrates through the vibration device and the tensioning device, and the vibration device is located between the insulator and the tensioning device. According to the invention, the insulator load and the vibration frequency and amplitude of the steel strand can be adjusted as required such that fatigue tests of different degrees can be used, and the applicability range is wide.

The invention discloses a high-throughput threshing and cleaning device for a combine harvester, relates to the technical field of agricultural equipment, and solves the technical problem about how to carry out cyclic screening in the threshing and cleaning device. The high-throughput threshing and cleaning device comprises a threshing device, a cleaning device and a grain conveying device; the cleaning device comprises a first fan, a double-layer screen cloth vibrating screen, a separating device, a first conveying device and a second fan; the double-layer screen cloth vibrating screen is located between the threshing device and the grain conveying device, a first screen cloth waste outlet of the double-layer screen cloth vibrating screen communicates with a feeding port of the separating device, and the first conveying device communicates with a feeding port of the double-layer screen cloth vibrating screen and a discharging port of the separating device; the first fan is used for outputting high-speed airflow towards the outside of the threshing and cleaning device between the double-layer screen cloth vibrating screen and the threshing device; and the second fan is used for outputting high-speed airflow towards the outside of the threshing and cleaning device between the double-layer screen cloth vibrating screen and the grain conveying device, so that high throughput is achieved while high-quality screening of crops is realized.

The invention provides a phototherapy unit, a sheet cascaded bendable vibrating phototherapy head assembled by using the phototherapy unit, and a phototherapy instrument with a sheet cascaded bendable vibrating phototherapy head, two or two The above phototherapy units are connected into a bendable whole through the sheet cascading hinge, and a silicon rubber protection ring is arranged around the phototherapy unit. The two ends of the sheet cascading hinge are respectively equipped with fixing straps piercing the ears, and the fixing straps are piercing the ears. There are perforations to facilitate the connection of the fixing belt, and a silicone light-blocking strip for clamping and preventing light leakage is provided at the movable joint of the two phototherapy units. The phototherapy device includes a phototherapy head, a therapy device host and a power adapter. Two or more phototherapy units are cascaded into a bendable vibrating treatment head that can adapt to the shape of human body parts by using thin-sheet cascading hinges, so that the phototherapy unit is facing the treatment site and the treatment effect is improved. optimize.

The invention discloses a ground experiment system for preparing porous ice layers by 3D printing, which includes a cold environment box, a peristaltic pump, a three-axis guide rail, a computer host, a piezoelectric sprayer, and a control unit; the piezoelectric sprayer can be used according to actual conditions It needs to be replaced, and the spray flow rate and the average particle size of the droplets can be precisely adjusted through the size and quantity of the piezoelectric sprayer micropores, the drilling range, and the vibration frequency; the control unit controls the temperature of the cold environment box, the movement of the slide rail, the flow rate of the peristaltic pump, and the piezoelectric sprayer frequency. The present invention can 3D print an ice layer with stable physical properties on a flat or irregularly curved surface for ground anti-icing experiments. The invention has the advantages of simple operation, simple structure, convenient installation, low energy consumption, convenient maintenance and obvious effect, and can effectively improve the quality of the ground cold environment anti-icing experiment.

The present invention provides a method, a device and a storage medium for controlling the vibration frequency of a linear motor. The method for controlling the vibration frequency of the linear motor includes: defining the basic vibration waveform, the driving voltage waveform and the waveform splicing mode of the vibration frequency of the linear motor; calculating the duration of the specified basic vibration waveform; calculating the first coefficient of the driving voltage waveform; calculating obtaining the second coefficient of the driving voltage waveform; calculating the calculated voltage value of the driving voltage waveform according to the first coefficient and the second coefficient; comparing the calculated voltage value with the maximum output voltage value to obtain the vibration of the linear motor driven and a driving voltage waveform composed of a plurality of the driving voltage values; splicing the driving voltage waveforms, and outputting the driving voltage waveform of the basic vibration waveform. The present invention realizes precise control of the vibration frequency of the linear motor, improves the vibration effect of the linear motor, and provides users with a richer vibration experience.

The invention provides an atomization system and a control method thereof. The atomization system comprises an atomization sheet and an atomization pool, wherein the atomization sheet can atomize liquid or foam in the atomization pool, an inlet, an outlet and an atomization port are formed in the atomization pool, the atomization sheet is arranged on the atomization port, and external liquid and / or gas can enter the atomization pool from the inlet, and liquid and / or gas in the atomization pool can be discharged from the outlet to enter the atomization pool, and the atomization sheet is a microporous piezoelectric vibrating sheet. The atomization system has the advantages of being simple in structure, convenient to use, and capable of solving the problems of color change of a cotton rod, peculiar smell generation, taste mixing and liquid leakage of an atomizer. In addition, the control method of the atomization system can obtain the optimal atomization effect and adjust the mist discharging size by controlling the vibration frequency of the atomization sheet.

The invention discloses a continuous vibration controller for a structure, which comprises a bottom plate, a side plate is fixedly arranged on one side of the upper wall of the bottom plate, and a vibrating block is arranged on the bottom plate, and the vibrating block passes through two slides. The block is slidably arranged on the bottom plate, and two sliding grooves corresponding to the slider are opened on the bottom plate, and a slide plate is fixedly installed on the side wall of the vibrating block close to the side plate, and the end of the sliding plate away from the vibrating block runs through The side plate is provided with a sliding opening corresponding to the slide plate, and the side wall of the side plate away from the vibrating block is also provided with a turntable, and the turntable is set on the side plate through the rotation of the rotating rod. The invention can adjust the vibration frequency and vibration amplitude of the vibrating block according to the needs, realizes the diversity of the vibrating block vibration modes, thereby realizes the research on the same object with different amplitudes and vibration frequencies, and greatly improves the vibration research Effect.

The invention discloses a high-frequency vibrating screen for a mobile crusher, comprising a box body, an oil storage tank is fixedly connected to the top left of the top of the box inner cavity, and a rotating motor is fixedly connected to the top of the inner cavity of the connecting frame. The output end of the rotating motor is fixedly connected with a first driving wheel through a coupling, the outer surface of the first driving wheel is slidably connected with a first sheave, and the inner surface of the first sheave is fixedly connected with a rotating shaft. The side of the shaft away from the connecting frame is fixedly connected with an adjusting disc, the surface of the adjusting disc is fixedly connected with an oil quantity adjusting device, the middle position of the top of the support frame is fixedly connected with an engine, and the output end of the engine is fixedly connected with a coupling through a coupling. A transmission device, wherein a side of the transmission device away from an engine is slidably connected with a vibrating screen, and the invention relates to the technical field of mobile crushers. The device can precisely control the amount of oil so as to control the vibration frequency of the vibrating screen. The vibration frequency is high, and the stone can be quickly screened, saving time and improving efficiency.

The invention discloses a strap type cervical vertebra and lumbar vertebra supporting massager. The defect that a massager in the prior art cannot achieve massage and supporting at the same time is overcome, and the effects that wearing is convenient and comfortable, the massager is not limited by the posture of the human body, and the cervical vertebrae and the lumbar vertebrae are supported all the time in the massage process are achieved. According to the technical scheme, the massager comprises a massager body, double shoulder straps and a belt, and the massager body is fixed to the rear side of the human body through the double shoulder straps and the belt; the massager body comprises a rigid framework and an outer packaging layer arranged on the outer side of the rigid framework, the rigid framework comprises a neck framework, a breast framework, a waist framework and a support which are connected in sequence, the neck framework is connected with the breast framework through a sliding rod mechanism I, the breast framework is connected with the waist framework through a sliding rod mechanism II, and the waist framework and the support are connected through a thread structure.

The embodiment of the invention discloses a vibration device for manufacturing of artificial stone blocks. The vibration device comprises a base, sliding columns, a vibration plate, a motor and a vibration excitation device. The sliding columns are perpendicularly arranged on the base, the vibration plate is movably arranged on the sliding columns according to a preset route, the motor is fixedly arranged on the bottom face of the vibration plate, the vibration excitation device is fixedly arranged on a bearing of the motor, and the vibration excitation device comprises an eccentric wheel and an eccentric wheel regulating device. The eccentric wheel regulating device of the vibration device can conveniently regulate the amplitude of the vibration plate, and different vibration needs are met.

The invention relates to a horizontal cyclic loading system and method applicable for vibration test of an offshore wind turbine pile foundation. The horizontal cyclic loading system comprises a platform motion structure used for setting a vibration position, a horizontal cyclic loading structure used for controlling the vibration frequency and amplitude of the pile foundation, and a pile foundation fixing structure applicable for various pile diameters, wherein the platform motion structure is arranged on the top of a test water tank, and the horizontal cyclic loading structure is installed on a platform provided by the platform motion structure, and can be rotated around the pile foundation by 360 DEG; and the pile foundation fixing structure is connected to the horizontal cyclic loadingstructure through rotating rods. The horizontal cyclic loading system is simple in principles and easy to operate, and the amplitude of the horizontal cyclic load can be kept constant in test; meanwhile, the vibration frequency of the pile foundation and the included angle between the wave current and the natural vibration direction of a pile can be controlled in real time; and additionally the horizontal cyclic loading system can be further suitable for pile foundations of different sizes.