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49results about How to "Reduce high frequency vibration" patented technology
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Piezoelectric self-sensing based adjustable damper
ActiveCN105673760AChange sizeTo achieve the purpose of adjustmentSpringsGas and liquid based dampersDamping factorCapacitance
The invention discloses a piezoelectric self-sensing based adjustable damper. The piezoelectric self-sensing based adjustable damper comprises an upper lifting lug, a dustproof cover, a piston rod, a guide seat assembly, a working cylinder barrel, a working piston assembly, a seal ring, a floating piston, a closed air chamber and a lower lifting lug, wherein the working piston assembly comprises a compression block, a limiting block, a limiting rod, a piezoelectric valve plate, a piston, a flow valve, a piston packing ring, a rebound valve, a preset normal open hole and a compression nut; the piezoelectric valve plate is formed by connecting a plurality of piezoelectric displacement units in series; each piezoelectric displacement unit is composed of a piezoelectric material stack layer and a displacement enlargement mechanism. The piezoelectric valve plate generates induced charge under the action of oil pressure, extracts induced voltage and exerts control voltage via a bridge circuit to change the size of the valve plate so that the size of a throttling area changes and a damping coefficient is adjustable. Based on the piezoelectric self-sensing effect, a sensor and an actuator are integrated on the same valve plate, the piezoelectric self-sensing based adjustable damper is simplified in structure, stable to control and high in dynamic response speed, and the capacity coupling is avoided.
Owner:JIANGSU UNIV
Fan device and breathing machine with same
ActiveCN103807221AReduce in quantityReduce outgoingRespiratorsPump componentsLow noiseEmbedded system
The invention discloses a fan device and a breathing machine with the same. The fan device comprises a shell, a fan vibration source and a buffer assembly, wherein the fan vibration source is arranged in the shell, the buffer assembly is used for enabling the fan vibration source to be connected with the shell, and the buffer assembly comprises at least two of a positioning buffer component connected with the top of the fan vibration source, a connecting buffer component which at least partly contains the fan vibration source, and a supporting buffer component which is connected with the bottom of the fan vibration source. The fan device can effectively buffer vibration of a fan and reduce and lower noise transmission and is simple in structure.
Owner:BMC MEDICAL
Server case and a high-frequency air inlet flow field rectification and heat dissipating structure thereof
InactiveCN109002147AReduce high frequency vibrationReduce vibration effectsPump componentsDigital processing power distributionAirflowComputer fan
The invention discloses a high-frequency air inlet flow field rectification and heat dissipating structure of a server case, comprising a fan frame arranged on the case, a plurality of heat dissipation fans arranged on the fan frame, and a waveguide plate arranged on the fan frame and located on the air inlet side of each heat dissipation fan for rectifying the air inlet turbulence to form laminarflow. Thus, after the waveguide plate rectifies the inlet air flow, the inlet air turbulence generated by the heat dissipation fan in the process of high-speed rotation will be rectified to form laminar flow, so that the inlet air flow can uniformly and orderly pass through the fan frame and enter into the inside of the server case to dissipate heat for the hard disk and other components. As theinlet air turbulence is rectified to form laminar flow, the high-frequency vibration of the inlet air flow field is greatly reduced, the airflow is more uniform and smooth, and the airflow fluctuationis low. When the heat dissipation is carried out on the hard disk, the vibration influence on the hard disk can be reduced, the read and write efficiency of the hard disk can be improved, and errorsin data read and write can be avoided. The invention also discloses a server case, the beneficial effect of which is described above.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Motor for ship and vibration and noise reduction method thereof
ActiveCN102983696AReduce distanceImprove mute effectMagnetic circuit rotating partsMagnetic circuit stationary partsThree phase asynchronous motorVibration transmissibility
The invention discloses a motor for a ship and a vibration and noise reduction method thereof. A three-phase asynchronous motor for the exiting ship is improved from two aspects of reducing the electromagnetic exciting force and preventing the superposition of the frequency of the electromagnetic exciting force with the inherent frequency of a motor stator core, so that the low-frequency vibration generated by the electromagnetic exciting force is maximally avoided or weakened, and the high-frequency vibration is reduced. According to a principle that if the underground vibration frequency is lower, the vibration transmissibility is stronger, the low-frequency vibration acceleration level and the total vibration level of the three-phase asynchronous motor for the exiting ship can be greatly reduced, so that the mute ability of the ship is improved, and the distance of the ship discovered by sonar equipment is reduced.
Owner:WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
Device and method for reducing oscillator accelerated speed effect through mixed compensation
ActiveCN104270094AReduce vibration effectsSmall sizeOscillations generatorsSelf recoveryControl theory
The invention discloses a device and method capable of reducing the oscillator accelerated speed effect, and aims at providing a device and method for reducing the accelerated speed effect through the cooperation of mechanical compensation and real-time compensation. The device is composed of an oscillator, an accelerated speed sensor, an accelerated speed compensation circuit, an elastic support and a metal shell. The elastic support is a supporting piece which has the elasticity, can generate deformation under the 0-100 g accelerated speed condition, and can achieve self recovery. The method is characterized in that high-frequency vibration is reduced through the elastic support, the offset voltage is generated in real time through the accelerated speed compensation circuit to be applied to the oscillator, and frequency changes caused by low-frequency vibration are offset. By means of the device and method, influences of 2-2 KHz vibration on the output performance of the oscillator can be effectively reduced, and the oscillator accelerated speed effect can be better reduced.
Owner:长沙天穹电子科技有限公司
A transmission system torsional vibration reducing method and application thereof
ActiveCN104896007AReduce high frequency vibrationReduce vibrationVibration dampersSpringsWind forceTransmission system
The invention provides a transmission system torsional vibration reducing method and application thereof. The method is characterized in that a torsional vibration damper, which is a tuned rotary inertia damper, is added on a transmission shaft in a parallel connection manner, and the torsional rotation movement around the transmission shaft is used for reducing the vibration level of a certain first order torsional mode frequency. The method is flexible, can effectively reduce vibration without damage to the original structure of the transmission system, and can be used for later repair of the transmission system. The method can be applied to wind energy / tidal current energy generator sets; the torsional vibration damper is installed on a shaft, connected with a generator, of a high speed shaft coupler to greatly reduce a first-order mode component in the torsional vibration, so that a transmission system can operate more stably, the reliability of the structure can be improved and the service life can be prolonged.
Owner:国能联合动力技术(保定)有限公司
IMU shock absorption and heat insulation device based on silica gel and preparation method
ActiveCN111016033AReduce the impactReduce high frequency vibrationDomestic articlesEngineeringSilica gel
The invention discloses an IMU shock absorption and heat insulation device based on silica gel and a preparation method, and belongs to the field of inertial navigation systems. The IMU shock absorption and heat insulation device can reduce high-frequency vibration and relieve the influence of temperature change on an IMU. The IMU shock absorption and heat insulation device comprises a pressing plate, a silica gel shock absorption and heat insulation body, an IMU sensor, a flat cable, a printed circuit board and a bottom plate, wherein the flat cable is connected with the printed circuit board; the printed circuit board is connected with the IMU sensor; the IMU sensor and the printed circuit board are wrapped in the silica gel shock absorption and heat insulation body; the pressing plate is arranged at the top of the silica gel shock absorption and heat insulation body; the silica gel shock absorption and heat insulation body is fixed to the bottom plate; and the bottom plate is connected with the pressing plate. The IMU shock absorption and heat insulation device is simple and compact in structure, convenient and fast to mount, high in production efficiency, low in material cost and good in shock absorption and heat insulation effect.
Owner:武汉迈普时空导航科技有限公司
Ballastless track plate structure for realizing broadband vibration attenuation based on photonic crystal principle
ActiveCN112359652AGood vibration reduction effectGood high frequency vibrationBallastwayNon-rotating vibration suppressionVibration attenuationPhotonic crystal
The invention discloses a ballastless track plate structure for realizing broadband vibration attenuation based on a photonic crystal principle. The structure comprises a ballastless track plate vibration attenuation structure consisting of three parts of a periodic steel column vibration attenuation device, a periodic rubber column vibration attenuation device and a track plate which are repeatedly arranged along the direction of a line. The periodic steel column vibration attenuation device and the periodic rubber column vibration attenuation device are both located in the track plate belowa track position, and the periodic rubber column vibration attenuation device is arranged below the periodic steel column vibration attenuation device and distributed side by side in parallel. The periodically-arranged steel columns are good in high-frequency vibration attenuation, the periodically-arranged rubber columns are good in low-frequency vibration attenuation, rubber can attenuate high-frequency vibration to a certain extent due to a damping effect of the rubber, and overall vibration of the track structure is greatly reduced through combination of the two.
Owner:CENT SOUTH UNIV
Frequency continuously adjustable mass damper
ActiveCN104929268AReduce high frequency vibrationEnsure safetyBridge structural detailsShock proofingSkyEngineering structures
The invention belongs to the technical field of civil engineering structure vibration damping and provides a frequency continuously adjustable mass damper. The frequency continuously adjustable mass damper is mainly composed of stand columns, a weight box, weight steel plates, a cross beam, a bottom plate, pressing plates and the like. The frequency continuously adjustable mass damper is suitable for controlling high-frequency vibration in large-span sky bridges, port piers and large-span building structures. Compared with a traditional tuned mass damper, the cross beam is adopted to replace springs to provide rigidity of a damping system and reduce the high-frequency vibration. The stand columns are connected with the bottom plate and the pressing plates in a clamping mode, the mounting positions of the stand columns can be adjusted in the length direction of the cross beam, and then the span of the cross beam can be changed. The frequency of the damping system can be continuously adjusted by adjusting the span of the cross beam. The weight steel plates are vertically assembled and connected so that the mounting space can be reduced; meanwhile, the frequency of the damping system can be slightly adjusted by changing the number of the weight steel plates.
Owner:DALIAN UNIV OF TECH
Constant-temperature sonic nozzle process gas flow calibration facility and constant-temperature stagnation vessel
InactiveCN102116666AExtended calibration rangeReduce high frequency vibrationTesting/calibration apparatusWater storageSonic nozzle
The invention provides a constant-temperature sonic nozzle process gas flow calibration facility and a constant-temperature stagnation vessel. The constant-temperature sonic nozzle process gas flow calibration facility comprises a straight pipe line in front of a meter, a detected flowmeter, a stagnation vessel and a gas source assembly which are connected in sequence, wherein the stagnation vessel is provided with a sonic nozzle as a standard meter, a wall of the stagnation vessel is a vessel wall with a water interlayer, a water inlet pipe and a water outlet pipe of the vessel wall with the water interlayer are communicated with a constant-temperature water storage body, and a circulating driving pump is arranged to form a constant temperature circulating channel. In the technical scheme, the effect of external factors on detection temperature is prevented, so that the whole gas flow detection and calibration operation to be accurately carried out in a stable condition, the high-frequency vibration can be greatly reduced and the working noise can be greatly lowered.
Owner:丹东科泰仪器仪表有限公司
Novel engine suspension
PendingCN109532451AReduce vibrationReduce high frequency vibrationNon-rotating vibration suppressionJet propulsion mountingEngineeringSmall magnitude
The invention discloses a novel engine suspension. The novel engine suspension comprises a shell, an upper end cover detachably connected with the shell, a hydraulic device and a middle channel formedin the inner wall of the shell, the outer edge of the middle channel abuts against the inner wall of the shell in the peripheral direction, a center hole runs through the center part of the middle channel, and the lower end of the shell is connected with a supporting frame at the bottom through a rubber element. The suspension structure is arranged, the middle channel and a hydraulic piston are arranged inside the suspension shell, vibration of an engine under different vibration magnitudes and vibration frequencies can be effectively attenuated, the vibration, transmitted to a frame, of theengine is lowered to the maximum degree, the suspension integrates air damping vibration reduction, sieve vibration reduction, oil gas diaphragm vibration reduction, rubber vibration reduction and torsion rod vibration reduction, through a sieve, small-magnitude vibration can be attenuated, and through a rubber oil gas diaphragm and a torsion rod spring, large-magnitude vibration can be attenuated.
Owner:HENAN INST OF SCI & TECH
Damper type floating slab track
ActiveCN112501955AExpand the range of vibration isolation frequenciesImprove stabilityBallastwayEnergy absorptionReciprocating motion
The invention discloses a damper type floating slab track. The damper type floating slab track comprises a shear hinge for connecting a track slab with another track slab, and a spring-viscous damperassembly which is arranged below a steel rail, is arranged in a floating slab and is used for reducing vibration. The damper type floating slab track has the advantages that the spring-viscous damperreplaces a traditional steel spring to serve as a vibration isolation element, parameters of the elastic element are reasonably matched, high-frequency vibration is effectively restrained, low-frequency resonance energy of the track slabs is absorbed, the defect that a steel spring floating plate track restrains low-frequency vibration is overcome, and the vibration isolation frequency range of the floating slab track is expanded; and the damper assembly is convenient to mount, dismount and overhaul and maintain in the later period; and the damper converts kinetic energy to thermal energy fordissipation, is simple in structure and stable in motion when doing reciprocating motion.
Owner:EAST CHINA JIAOTONG UNIVERSITY
Magnetorheological fluid inflatable vibration reducer
InactiveCN106641071AReduce high frequency vibrationCancel noiseSpringsNon-rotating vibration suppressionMagnetorheological fluidEngineering
The invention relates to a magnetorheological fluid inflatable vibration reducer. The magnetorheological fluid inflatable vibration reducer comprises a working cylinder, a piston rod inserted in the working cylinder and capable of performing a reciprocating motion, a piston module arranged at a free end of the piston rod, and a floating piston and a sealed gas chamber arranged below the piston module in sequence; the piston module divides an inner cavity of the working cylinder above the floating piston into a first working cavity and a second working cavity; both the first working cavity and the second working cavity are filled with magnetorheological fluid; the piston module includes a piston fixedly connected with the free end of the piston rod, a magnet exciting coil wound on the outer side wall of the piston, and circulating valves inserted through the piston; the magnetorheological fluid is circulated between the first working cavity and the second working cavity through the circulating valves; and the sealed gas chamber is filled with high-pressure gas. Compared with the prior art, the magnetorheological fluid inflatable vibration reducer is excellent in sealing effect, largely accelerates relative speeds of the piston module and the working cylinder, can generate high enough damping force, is excellent in noise eliminating effect, is high in magnet exciting utilization rate, and is low in energy consumption.
Owner:SHANGHAI UNIV OF ENG SCI
Motorcycle handlebar pipe connecting structure
InactiveCN103171711AReduce vibrationReduce high frequency vibrationMotorcyclesVertical tubePetroleum engineering
The invention discloses a motorcycle handlebar pipe connecting structure. The motorcycle handlebar pipe connecting structure comprises a stand pipe combination part, wherein a direction column adjusting nut is arranged on the stand pipe combination part, a direction column cover-shaped nut is arranged at the top end of the stand pipe combination part, a direction column upper connecting plate is arranged between the direction column adjusting nut and the direction column cover-shaped nut, the middle portion of the direction column upper connecting plate is provided with a direction column clamping seat assembly, a direction column clamp is arranged on the direction column clamping seat assembly, a handlebar pipe is arranged on the direction column clamp, a direction column clamping seat bush is arranged between the direction column clamping seat assembly and the direction column upper connecting plate, and a clamping seat locking nut is arranged in the lower portion of the direction column clamping seat assembly. The motorcycle handlebar pipe connecting structure has the advantages that vibration of the handlebar pipe is lowered, comfort of operation is enhanced, connection is firm and reliable, maintenance cost is low and the like.
Owner:万李
Low-noise range hood
ActiveCN106246604AEffective noise reductionReduce turbulenceDomestic stoves or rangesPump componentsImpellerLow noise
The invention discloses a low-noise range hood, which comprises a volute, wherein an impeller is arranged inside the volute, a first annular air duct is arranged at the bottom of the volute, and a second annular air duct is arranged above the first annular air duct; a plurality of first partition plates are arranged in the first annular air duct, a spheroidal air bag is movably connected between the two adjacent first partition plates, a plurality of first through holes are evenly formed in the first partition plates, a second partition plate is arranged at the air inlet of the first annular air duct, a plurality of second through holes are evenly formed in the second partition plate, and a first air deflector is obliquely arranged between the second partition plate and the first partition plate adjacent to the second partition plate; a third partition plate is arranged at the air inlet of the second annular air duct, a third through hole is formed in the third partition plate and is communicated with an air inlet end of a cavity, and an air outlet end of the cavity is communicated with the second annular air duct. According to the low-noise range hood, the deficiencies of the prior art can be improved, and the efficient noise reduction at different air volumes can be realized.
Owner:重庆潼玮商贸有限公司
A damper-type floating slab track
ActiveCN112501955BExpand the range of vibration isolation frequenciesImprove stabilityBallastwayEnergy absorptionReciprocating motion
The invention discloses a damper-type floating plate track, a shear hinge connecting the track plate with another track plate, and a spring for damping vibration arranged under the steel rail and inside the floating plate. Viscous Damper Assembly. The advantage of the present invention is that the traditional steel spring is replaced by a spring-viscous damper as the vibration isolation element, and the parameters of the elastic element are reasonably matched, which not only effectively suppresses the high-frequency vibration, but also absorbs the low-frequency resonance energy of the track plate. It makes up for the deficiency of the steel spring floating plate track in suppressing low-frequency vibration, and expands the vibration isolation frequency range of the floating plate track. The damper assembly is easy to install, disassemble, and for later maintenance. The damper converts kinetic energy into heat energy and dissipates it. Its structure is relatively simple, and the movement is stable when reciprocating.
Owner:EAST CHINA JIAOTONG UNIVERSITY
A kind of IMU shock-absorbing and heat-insulating device and preparation method based on silica gel
ActiveCN111016033BReduce high frequency vibrationLow costDomestic articlesThermal insulationEngineering
Owner:武汉迈普时空导航科技有限公司
Lightweight rear suspension structure applied to electric automobiles
PendingCN110682754ASimplified installation requirementsStiffness changes linearlyLeaf springsResilient suspensionsAgricultural engineeringRivet
The invention discloses a lightweight rear suspension structure applied to electric automobiles. The lightweight rear suspension structure comprises a monolithic-leaf plate spring made of a compositematerial, wherein the front end of the monolithic-leaf plate spring is connected with a front spring eye; the rear end of the monolithic-leaf plate spring is connected with a rear spring eye; the middle part of the monolithic-leaf plate spring is located in a rear axle plate spring seat; the middle part of the monolithic-leaf plate spring is equipped with a backing plate frame and two U-shaped bolts; the two U-shaped bolts are connected to the backing plate frame through nuts; the backing plate frame is clung to the bottom of the rear axle plate spring seat; the backing plate frame, the monolithic-leaf plate spring and the rear axle plate spring seat are fixedly connected with each other through rivet heads; the backing plate frame is articulated with a damper; the upper end of the damperis connected to an automobile body longitudinal beam. Compared with the existing rear suspension, which adopts (3 plus 2)-leaf two-stage stiffness springs, the lightweight rear suspension structure only adopts one monolithic-leaf plate spring made of the composite material, so that the mounting requirement is simplified; the weight of the monolithic-leaf plate spring is only 1 / 3 of the weight of the original steel plate spring; the inner damping resistance among leaves does not exist in the monolithic-leaf plate spring; the stiffness change is more linear; and the driver and the passengers feel more comfortable.
Owner:德力新能源汽车有限公司
Suspension device with members on side surfaces
InactiveCN103009984AImprove vibration isolation performanceWork lessJet propulsion mountingInternal combustion mountingVehicle frameWork performance
The invention provides a suspension device with members on side surfaces. The suspension device comprises a main member, wherein the main member comprises a first surface and a second surface that is opposite to the first surface; a first through hole is formed in the center of the main member; and the first through hole penetrates through the main member in the direction perpendicular to the first surface and the second surface. The suspension device is characterized in that the members which are used for changing the side surface state of the main member are arranged on the side surfaces of the main member. The suspension device with the members on the side surfaces has the positive effects that due to the members designed on the side surfaces of the main member, the high-frequency vibration of the automobile engine and the low-frequency vibration of the automobile frame are effectively reduced, the vibration isolation and reduction effect and the working performance of the suspension device within the whole frequency working range are enhanced, the space structure of deformation due to compression and vibration is improved, the outer surface area of the suspension device is enlarged, the heat dissipation is facilitated, the structure utilization ratio is improved, and the production and the assembly are convenient.
Owner:SHANGHAI DIANJI UNIV
An adjustable damping shock absorber based on piezoelectric self-sensing
ActiveCN105673760BChange sizeTo achieve the purpose of adjustmentSpringsGas and liquid based dampersCapacitanceDamping factor
Owner:JIANGSU UNIV
Anti-tearing pressure-reducing sliding chute buffering bed
InactiveCN113443339AImprove shock absorptionReduce contact frictionConveyorsNon-rotating vibration suppressionControl theoryRestoring force
The invention discloses an anti-tearing pressure-reducing sliding chute buffering bed which comprises a base plate. A second base is fixedly installed in the middle of the top of the base plate, a main frame is fixedly installed on one side of the top of the second base, buffering structures are installed on the two sides of the main frame, and a plurality of supporting frames are fixedly installed on the two sides of the top of the main frame. Second buffering wheels are installed between the two supporting frames, connecting frames are symmetrically installed on the two sides of the main frame, and first buffering wheels are installed between the supporting frames and the connecting frames. When the first buffering wheels are vibrated, first dampers acts to provide the restoring force for the connecting frames, and therefore the connecting frames can drive the first buffering wheels to quickly return to the initial position, and the vibration reducing and buffering effects are achieved. When the second buffering wheels are vibrated, second dampers bear the extrusion force, the restoring force of the second dampers pushes movable blocks to move along the tops of first bases, wedge-shaped blocks are extruded, and therefore the wedge-shaped blocks can move upwards, the vibration effects of the wedge-shaped blocks are balanced, the high-frequency vibration transmitted by a conveying belt is effectively reduced, and the service life of the buffering bed is prolonged.
Owner:淮南市天力达工矿配件有限公司
Intelligent active control type high-pressure pipeline pressure pulsation damping device and method
PendingCN112696553ASuppress structural vibrationRealize active and passive integrated controlPipe elementsPhysicsEngineering
Owner:NORTHEASTERN UNIV
Unmanned aerial vehicle for geographic information data acquisition and control method thereof
ActiveCN112810818AOptimize the installation structureReduce high frequency vibrationAircraft componentsAircraftsCamera imageData acquisition
The invention discloses an unmanned aerial vehicle for geographic information data acquisition, which comprises a fuselage, a driving motor is mounted on the fuselage, the driving motor is connected with a propeller, and a damping mechanism is mounted on the outer side of the driving motor; the vibration reduction mechanism comprises a mounting hole formed in the machine body, a plurality of outer supporting pieces are annularly fixed to the inner side of the mounting hole, the bottoms of the outer supporting pieces are obliquely arranged towards the center of the mounting hole, a through hole is formed in the center of the bottom of the mounting hole, and a threaded hole matched with the through hole is formed in the bottom of the driving motor. The fixing bolts penetrate through the through holes and then are in threaded connection with the threaded holes, inner supporting pieces in one-to-one correspondence with the outer supporting pieces are fixed to the outer side of the driving motor, the outer supporting pieces are parallel to the inner supporting pieces, rubber layers are fixed to the inner sides of the outer supporting pieces and the outer sides of the inner supporting pieces respectively, and the rubber layers on the outer supporting pieces make contact with the rubber layers on the inner supporting pieces. According to the invention, the defects in the prior art can be overcome, and the anti-interference capability of airborne camera imaging on high-frequency vibration is improved.
Owner:丰泽智慧科技有限公司
Self-adaptive shockproof designed packaging transportation device
InactiveCN113086420AAvoid damageAvoid shockContainers to prevent mechanical damageDamagable goods packagingEngineeringStructural engineering
The invention discloses a self-adaptive shockproof designed packaging transportation device, and belongs to the technical field of transportation equipment. The self-adaptive shockproof designed packaging transportation device comprises an outer box body mounted on a transport vehicle, a truss fixedly connected to the inner wall of the outer box body, an inner box body arranged in the outer box body and a plurality of groups of energy dissipaters; one ends of every two energy dissipaters are jointly hinged to the truss, the other ends of the two energy dissipaters are hinged to different positions of the side wall of the inner box body respectively, each energy dissipater comprises a sleeve, a piston rod, a first piston head, a second piston head, an upper cylinder sleeve, a lower cylinder sleeve and a fixed partition plate, and the lower cylinder sleeve is slidably connected with a rotating partition plate; and the rotating partition plate is provided with a first connecting column and a second oil through hole, a spiral groove is formed in the inner wall of the sleeve, and an opening groove is formed between the upper cylinder sleeve and the lower cylinder sleeve. The self-adaptive shockproof designed packaging transportation device is provided with the energy dissipaters, the buffering effect can be achieved, and the purposes of rapidly attenuating vibration and reducing the amplitude of vibration can be achieved.
Owner:JIAOZUO UNIV
A frequency continuously adjustable mass damper
ActiveCN104929268BReduce high frequency vibrationEnsure safetyBridge structural detailsShock proofingSkyEngineering structures
The invention belongs to the technical field of civil engineering structure vibration damping and provides a frequency continuously adjustable mass damper. The frequency continuously adjustable mass damper is mainly composed of stand columns, a weight box, weight steel plates, a cross beam, a bottom plate, pressing plates and the like. The frequency continuously adjustable mass damper is suitable for controlling high-frequency vibration in large-span sky bridges, port piers and large-span building structures. Compared with a traditional tuned mass damper, the cross beam is adopted to replace springs to provide rigidity of a damping system and reduce the high-frequency vibration. The stand columns are connected with the bottom plate and the pressing plates in a clamping mode, the mounting positions of the stand columns can be adjusted in the length direction of the cross beam, and then the span of the cross beam can be changed. The frequency of the damping system can be continuously adjusted by adjusting the span of the cross beam. The weight steel plates are vertically assembled and connected so that the mounting space can be reduced; meanwhile, the frequency of the damping system can be slightly adjusted by changing the number of the weight steel plates.
Owner:DALIAN UNIV OF TECH
Compressor and refrigeration equipment
PendingCN113982884AReduce vibrationDissipate vibrational energyCompressorPositive displacement pump componentsVibration amplitudeVibrational energy
The invention discloses a compressor and refrigeration equipment. The compressor comprises a compressor shell, a stator, a supporting frame, damping particles and a cover plate, the supporting frame is connected to one end, in the axial direction, of the stator and fixedly connected with the compressor shell, the supporting frame is provided with a center hole and a cavity, and the cavity and the center hole are arranged in a spaced mode; the damping particles are accommodated in the cavity; the cover plate is fixedly connected with the supporting frame. According to the invention, the supporting frame connected with the axial end part of the stator is arranged, so that the stator is prevented from being in direct contact with the compressor shell; the supporting frame is provided with the cavity and is sealed through the cover plate, the cavity is filled with the damping particles, vibration of the stator can be transmitted to the damping particles through the supporting frame, the damping particles and the damping particles and the wall face of the cavity collide and rub with each other, and therefore vibration energy of the stator is consumed, and the amplitude of the stator is reduced, and thus vibration transmitted from the stator to the compressor shell is reduced, and vibration noise of the compressor is reduced.
Owner:GUANGDONG MEIZHI COMPRESSOR +1
A system and method for suppressing high-frequency vibration of a low-voltage high-power multi-phase variable-frequency motor
ActiveCN103269197BReduce high frequency vibrationReduce noiseElectronic commutation motor controlAC motor controlMagnetic field couplingPulse sequence
Owner:武汉长海电力推进和化学电源有限公司
A transmission system torsional vibration damping method and its application
ActiveCN104896007BReduce high frequency vibrationReduce vibration levelsVibration dampersSpringsCouplingDrive shaft
The invention provides a transmission system torsional vibration reducing method and application thereof. The method is characterized in that a torsional vibration damper, which is a tuned rotary inertia damper, is added on a transmission shaft in a parallel connection manner, and the torsional rotation movement around the transmission shaft is used for reducing the vibration level of a certain first order torsional mode frequency. The method is flexible, can effectively reduce vibration without damage to the original structure of the transmission system, and can be used for later repair of the transmission system. The method can be applied to wind energy / tidal current energy generator sets; the torsional vibration damper is installed on a shaft, connected with a generator, of a high speed shaft coupler to greatly reduce a first-order mode component in the torsional vibration, so that a transmission system can operate more stably, the reliability of the structure can be improved and the service life can be prolonged.
Owner:国能联合动力技术(保定)有限公司
A low-noise range hood
ActiveCN106246604BEffective noise reductionReduce turbulenceDomestic stoves or rangesPump componentsImpellerLow noise
Owner:重庆潼玮商贸有限公司
Warp knitting machine yarn path distributing system
PendingCN111778628AReduce high frequency vibrationGuarantee delivery qualityWarp knittingEngineeringStructural engineering
The invention relates to the field of textile machinery, in particular to a warp knitting machine yarn path distributing system, and mainly aims to solve the problem in the prior art that yarn path distribution is not reasonable to cause that the warp knitting quality of warp knitting fabric is poor. The warp knitting machine yarn path distributing system comprises a rack, seven or eight rotary shafts rotatably arranged on the rack, a drive motor driving the rotary shafts to rotate, and a warp knitting device; a plurality of pan heads are arranged on each of the rotary shafts; a yarn guiding compensating mechanism is arranged at the upper part of the warp knitting device; the rack covers the outer side of the warp knitting device; the rotary shafts are arranged on the rack in parallel in the front-rear direction; eight yarn placing areas including a first yarn placing area, a second yarn placing area, a third yarn placing area, a fourth yarn placing area, a fifth yarn placing area, a sixth yarn placing area, a seventh yarn placing area and an eighth yarn placing area for mounting all rotary shafts are arranged on the rack; and a yarn tension adjusting device for adjusting the tension of the yarn on each yarn placing area is arranged between the rack and the yarn guiding compensating mechanism.
Owner:JINJIANG PENGTAI MACHINERY TECH CO LTD
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