50results about How to "Stable vibration frequency" patented technology

A composite damper for a speaker comprises an inner ring surface material, an outer ring surface material, and a plurality of ribs connected between the inner ring surface material and the outer ring surface material. The inner ring surface material and the outer ring surface material have a plurality of alternating concentric peaks and valleys; thereby when it is coupled with a periphery of a voice coil of the speaker, it has a more stable vibration frequency.

The invention discloses a pipe end forming machine in the field of pipe machining equipment. The pipe end forming machine comprises a rack, wherein a clamping mechanism is arranged on the rack, a forming mechanism is arranged at one side of the clamping mechanism, the clamping mechanism comprises a clamping frame; one end, far away from the forming mechanism, of the clamping frame sinks inwards to form a clamping notch; gaps are respectively formed in side walls at two sides of the clamping notch, so that the clamping notch in the clamping frame is of a front and back through open structure; a lower clamping die is arranged at the bottom of the clamping notch, an upper clamping die is arranged above the lower clamping die, a clamping cylinder is fixedly arranged on the clamping frame, and under the action of the clamping cylinder, the upper clamping die can achieve die assembly or separation with the lower clamping die; the forming mechanism comprises a forming cylinder, a piston rod of the forming cylinder can extend to the direction of the clamping notch and is movably supported in the clamping frame; and a forming die is arranged at an end part of the piston rod of the forming cylinder. The pipe end forming machine has the advantages of being high in machining precision and capable of avoiding interference between a bent pipe and a machining bench.

The pellet feed drying and sorting integrated device includes a drying mechanism, a screw conveyor, and a sorting mechanism. The drying mechanism is connected to the screw conveyor. A sorting mechanism is set under the discharge end of the screw conveyor. There is a cone-shaped bucket with holes in the inner sleeve. A vertical shaft is arranged inside the drying bucket. The bottom end of the vertical shaft is connected to the rotating disk, and a hollow spiral heating coil is fixed on the vertical shaft. The sorting mechanism includes a sorting box, and an upper vibrating screen is installed on one side of the sorting box, and an upper chute is arranged under the upper vibrating screen. The lower vibrating screen is installed on the other side of the sorting box, and the lower chute is arranged under the lower vibrating screen. The pelleted feed that has been screened by the upper vibrating sieve enters the lower vibrating sieve. The upper vibrating screen and the lower vibrating screen are connected with vibrating motors. The invention is an integrated device for pellet feed drying and sorting, which integrates pellet feed drying and sorting, and has the advantages of good drying and sorting effects.

The invention relates to a pneumatic rammer which comprises a rammer head, a sealing nut, a cylinder body, a cylinder body nut, an air rod, an air inlet control valve, a handle, an air pipe connector and a piston rod. The rammer head is welded to the front end of the piston rod. The sealing nut is arranged at the joint of the cylinder body and a piston. The cylinder body is installed on the air rod through the cylinder body nut. The handle is arranged on the air rod. The air inlet control valve is arranged on the handle. The air pipe connector is installed at the end of the air rod. The air pipe connector is connected with air compression equipment through a high-pressure pneumatic pipe. A semispherical component is arranged on the rammer head. The pneumatic rammer has the beneficial effects that the semispherical component is welded to the rammer head, operation is convenient and fast, the vibration frequency is stable, the vibration strength is uniform, and the rammering effect is excellent.

The invention provides a string vibration period experiment instrument with a vibration motor and an electric vibration tuning fork as double vibration wave sources. The string vibration period experiment instrument with the vibration motor and the electric vibration tuning fork as the double vibration wave sources aims to the solve the technical problems that an existing string vibration experiment instrument is complicated in equipment structure, a dead zone exists during an experiment, and the demonstration effect is poor. The string vibration period experiment instrument comprises an experiment instrument body. A base is arranged at the bottom of the experiment instrument body, and a vibration motor assembly is installed on the experiment instrument body. The vibration motor assembly is installed on the head portion of the electric vibration tuning fork through a fixing flat plate. The vibration motor is installed in the vibration motor assembly. An eccentric block is installed on the right side of an outer rotating shaft of the vibration motor. A direct-current power source frequency measurement instrument is installed on the left side of the base. A voltage adjusting and frequency adjusting power source and a vibration motor frequency measurement instrument are installed on the direct-current power source frequency measurement instrument. The voltage adjusting and frequency adjusting power source is provided with a voltage adjustment and frequency adjustment alternation switch, a power switch and the like. The vibration motor frequency measurement instrument is provided with a power supply switch, a frequency switch and the like. When the string vibration period experiment instrument is used, through the steps of power source connection, voltage adjustment and the like, the string vibration frequency is obtained by measuring the vibration frequency with the vibration motor as the wave source finally. The double vibration wave sources can be mutually checked and compared. The string vibration period experiment instrument with the vibration motor and the electric vibration tuning fork as the double vibration wave sources has the advantages that the structure is reasonable, an operation method is easy to implement, and the demonstration effect is remarkable.

The invention discloses a vibrating device for a resonance crusher, which comprises a mounting bracket and a vibrating unit; the mounting bracket includes two vertically arranged bracket poles, and hinge shaft earrings are arranged on the outside of the bracket poles; one side of the crushing locomotive There is a front hinge seat on the body, and an oil cylinder is connected to the front hinge seat, and the free end of the oil cylinder is connected to the hinge earring on the support pole; on the other side, there are two or more rear hinge seats horizontally on the crusher body. , the central connection line of the rear hinge seat is parallel to the support vertical rod, the rear hinge seat is connected to the hinge earring on the support vertical rod through the connecting rod, the central connection line of the rear hinge seat, the connecting rod and the adjacent support vertical rod form Parallelogram structure, by adjusting the length of the oil cylinder to change the shape of the parallelogram structure, thereby adjusting the height of the vibration unit from the ground, the position of the vibration unit can be adjusted in a large space, the angle of the hammer head remains unchanged during the up and down movement, the connecting rod bears the main reaction force, and the oil cylinder The force is relatively small, prolonging the service life of the entire device.

The invention provides an intelligent self-adaptive vibration absorber. The intelligent self-adaptive vibration absorber comprises a driving body, a mass body, an elastic beam, a terminal limiting sensor and a piezoelectric sensor device, wherein the driving body is arranged at one end of the elastic beam; the mass body is movably arranged on the elastic beam, and moves in a reciprocating way along the elastic beam under the driving force of the driving body; the terminal limiting sensor and the piezoelectric sensor device are arranged on the end part of the other end of the elastic beam; self-adaptive control of the inherent frequency of the vibration absorber is realized through adjustment of the length of a cantilever beam formed on the elastic beam by the mass body. Meanwhile, the invention provides an array integrating device based on the intelligent self-adaptive vibration absorber and application of the intelligent self-adaptive vibration absorber. The intelligent self-adaptive vibration absorber is simple in structure, and is suitable for multi-field popularization; precision suppression of single vibration of a controlled object can be realized, precision suppression control can be performed on multi-frequency laminated vibration of the controlled object, and inertial driving and power generation application are realized through structural specificity.

The invention relates to the agricultural technical field, in particular to an agricultural seed sun-bathing device capable of preventing damp. The agricultural seed sun-bathing device capable of preventing damp comprises a seed sun-bathing box, wherein an inner accommodating cavity is arranged in the seed sun-bathing box; a bearing frame is arranged inside the inner accommodating cavity; the bottom of the inner accommodating cavity is transversely equipped with a transmission rod; outer threaded regions are arranged on areas at left and right ends of the transmission rod; thread directions ofthe outer threaded regions at left and right sides are reverse; transmission sleeves are mounted on the outer threaded regions through threaded connection; the transmission sleeves are externally connected and equipped with fixed bolts; bottoms of two sides of the bearing frame are equipped with supporting bolts; supporting connecting rods are mounted between the fixed bolts and the supporting bolts; the sun-bathing plate is mounted on the bearing frame; and the bottom of the middle area of the bearing frame is of a concave structure, and is equipped with a vibrating frame. On rainy days, theagricultural seed sun-bathing device also can be quickly stored for a time being. The device is matched with a rainproof curtain for expanding and paving, so that the rainproof effect can be effectively achieved.

The invention discloses a vibrating device with an Oldham coupling, which comprises a motor and is provided with an output rotating shaft; The Oldham coupling at one end of the Oldham coupling is connected to the output shaft, the other end of the Oldham coupling is connected to the eccentric shaft, and the output shaft is suitable for The eccentric shaft rotates eccentrically through the Oldham coupling group; the adjacent Oldham couplings are connected by key sleeves, and the adjacent Oldham couplings are suitable for relative sliding along the axial direction while being unable to relatively rotate. On this basis, the present invention also provides a membrane treatment system using the above vibration device. The vibration device mentioned above is suitable for preventing the membrane filtration system from being polluted by impurities while prolonging the service life of the motor equipment.

The invention relates to a curtain wall panel earthquake simulation system vibration performance parameter detection device and a method thereof. The detection device includes a vibration table, a fixing base, three laser light sources and three four-quadrant laser detectors, three sets of current and voltage conversion modules, three sets of computation modules, three sets of analog-to-digital converters and a micro controller; a motor is arranged inside the vibration table; the fixing base is in the shape of a cube; three surfaces of the fixing base which are perpendicular to an X axis, a Y axis and a Z axis are provided with a light reflecting plate respectively; the fixing base is in rigid connection with the vibration table through a connection rod; the three laser light sources are arranged above and opposite to the light reflecting plates respectively; and the three four-quadrant laser detectors are respectively arranged above and are opposite to the light reflecting plates. With the curtain wall panel earthquake simulation system vibration performance parameter detection device and the method thereof of the invention adopted, fast and accurate detection of vibration table high-frequency vibration performance parameters can be realized, and therefore, the problem of insufficient detection accuracy is high frequency vibration in an earthquake simulation system can be solved.

The invention provides a string vibration speed measurement experiment instrument with a vibration motor as a wave source. The string vibration speed measurement experiment instrument with the vibration motor as the wave source aims to solve the technical problems that according to an existing string vibration experiment instrument, an equipment structure is complicated, manufacturing cost is high, a dead zone exists during an experiment, the experiment efficiency is low, and the demonstration effect is poor. The string vibration speed measurement experiment instrument comprises an experiment instrument body. A base is arranged at the bottom of the experiment instrument body, and a vibration motor assembly is installed on the experiment instrument body. The vibration motor assembly is installed on a supporting stand column through a fixing flat plate. The vibration motor is installed in the vibration motor assembly. An eccentric block is installed on the right side of an outer rotating shaft of the vibration motor. A speed measurement disk and a photoelectric door are installed on the left side of the outer rotating shaft of the vibration motor. A direct-current power source speed measurement instrument is installed on the right side of the base. A voltage adjusting and frequency adjusting power source and a motor speed measurement instrument are installed on the direct-current power source speed measurement instrument. The voltage adjusting and frequency adjusting power source is provided with a voltage adjustment and frequency adjustment alternation switch, a power switch and the like. The motor speed measurement instrument is provided with a power supply switch, a frequency switch and the like. When the string vibration speed measurement experiment instrument is used, through the steps of power source connection, voltage adjustment and the like, the string vibration frequency is obtained by measuring the vibration frequency with the vibration motor as the wave source finally. According to the string vibration speed measurement experiment instrument with the vibration motor as the wave source, the structure is reasonable, and an operation method is easy to grasp.