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45results about How to "Reduce vibration displacement" patented technology
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Tuning quality damper vibration damping control device for blower fan
InactiveCN101302995AReduce vibration displacementExtend working lifeWind motor controlMachines/enginesFrequency bandWind force
The invention discloses a tuning quality damper vibration reduction control device used in a wind turbine, which relates to tuning quality damper vibration reduction control technology. The invention is arranged inside a tower arranged at an upper end of a wind generator and comprises a platform, rotation adjusting devices, a power device, a quality block assembly and a damper arranged on the platform; the platform is fixed on the internal wall of the tower; the key design points of the invention are characterized in that: the power of the power device drives the quality block assembly to rotate through the rotation adjusting devices so that the components on the platform can rotate synchronously along with the yaw of the wind turbine. Opposite direction adjustment can be realized forwardly along with wind directions by the invention, thus controlling vibration amplitude to the utmost extent. Furthermore, based on MTMD vibration reduction mechanism, the invention also provides an MTMD technical proposal with a plurality of single TMDs arranged from top to bottom in sequence; the power device coaxially drives varied rotation adjusting devices, thus guaranteeing the synchronous rotation speed of each turntable and controlling the vibration of the tower within a frequency band scope caused by the rotation of wind wheels.
Owner:SANY ELECTRIC CO LTD
Vibration reduction ship pipeline cabin penetrating piece
ActiveCN106015761AImprove vibration damping effectAdjust the damping capacityNon-rotating vibration suppressionPipesStress concentrationMechanical engineering
The invention discloses a vibration reduction ship pipeline cabin penetrating piece which comprises a pipeline and a cabin wallboard. The pipeline is externally provided with a cabin penetrating piece shell. The cabin penetrating piece shell is divided into an outer cabin penetrating piece shell body, a wavy shell body and an inner cabin penetrating piece shell body. The outer cabin penetrating piece shell body is connected with the cabin wallboard, the wavy shell body is connected with the outer cabin penetrating piece shell body at crest positions, and wavy fireproof rubber is arranged between the wavy shell body and the outer cabin penetrating piece shell body. Perpendicular connecting pieces are arranged on the inner cabin penetrating piece shell body and are provided with connecting rings, and parallel springs are arranged between the connecting rings and are parallel to the outer cabin penetrating piece shell body and the inner cabin penetrating piece shell body. Perpendicular springs perpendicular to the wavy shell body are arranged on the crests, and the parts, at the joint of the crests and the outer cabin penetrating piece shell body and at the outer portion of the outer cabin penetrating piece shell body, of the perpendicular springs are provided with bolts. A transverse partition plate is arranged at the middle portion of the cabin penetrating piece shell and is connected with the parallel springs. The vibration reduction ship pipeline cabin penetrating piece has the following beneficial effects that firstly, the vibration reduction capability of the pipeline cabin penetrating piece under collisions is improved; secondly, the vibration reduction capability of the cabin penetrating piece can be adjusted according to needs of different pipeline systems; and thirdly, the wavy shell body in the cabin penetrating piece can well reduce stress concentration.
Owner:HUAIHAI INST OF TECH
Linear integral stirling cryocooler
ActiveCN104048436AShorten the length of the machineReduce vibration displacementCompression machinesReciprocating motionPhase difference
The invention relates to a linear integral stirling cryocooler. The stirling cryocooler comprises a Dewar, an expansion machine and a compressor. The outer side of the circumference of the Dewar is provided with a damper for reducing the vibration of a cold head. The expansion machine comprises an expansion cylinder and a displacer component. The compressor comprises a fixed piston, a movable cylinder, a linear motor and a phase regulation mechanism for regulating the movement phase difference between a displacer and the movable cylinder. The fixed piston is of a hollow structure, and the expansion machine is located in the fixed piston. The fixed piston is sleeved with the movable cylinder, a non-contact clearance sealed structure is arranged between the fixed piston and the movable cylinder, and a sealed cavity formed by the fixed piston and the movable cylinder is a compression cavity. The movable cylinder reciprocates along the axial direction of the linear motor under the driving of the linear motor. According to the technical scheme, by adopting the invention, the length of the integral linear integral stirling cryocooler is shortened, the vibration of the cold head is reduced, and the application of the linear stirling cryocooler to the gyro gimbal of a guided missile is facilitated.
Owner:CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
Vibrating noise reducing B grade supporting fixed device of compressor
The invention relates to the air conditioning technical field, specially relates to a second level support fixed device of a vibration noise decreasing compressor, solves the problem that the low frequency noise generated by the resonance of the vibration of the compressor and the shell of the air conditioner. The technical project to solve the problem comprises a compressor provided with three feet flakes separated in 120 degree and screwed connected on the air conditioner, the compressor screwed connected with the screw of the air conditioner and a rubber shock absorber cushion cross-under the screw and connected with the feet flakes of the compressor, wherein the three feet flakes provided with via holes are weld at the middle-lower part of the shell of the compressor, the bottom of the three feet flakes provided with via holes are connected with an utensil-shaped fixed frame that has the same three feet flakes that could contain the lower shell body of the compressor via rubber shock absorber cushion, the three feet flakes at the bottom of the fixed frame penetrates via the screw and connects with the chassis of the air conditioner via the rubber shock absorber cushion between the feet flakes and the chassis, to decrease the resonance noise generated by the vibration of the compressor and the shell of the air conditioner.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Vibration-damping ship pipe clamp and support frame assembly
ActiveCN106122599AReduce vibration displacementSimple structurePipe supportsManufacturing technologyMarine engineering
The present invention discloses a vibration-damping ship pipe clamp and support frame assembly comprising a pipe, a ship body board and a support frame. A pipe clamp is arranged outside the pipe, and connected to a top cylinder of the support frame by means of a T-shaped connecting piece. A base plate of the support frame is connected to the ship body board. When the pipe vibrates under collision, springs in the pipe clamp, springs in the top cylinder of the support frame and springs in a base of the support frame function in reducing displacements and stresses of the whole assembly in a vertical direction, a lateral direction and a longitudinal direction, thus reducing the vibration displacement of the whole pipe. The vibration-damping ship pipe clamp and support frame assembly is reasonable and simple in structure and low in production cost. Each spring used in the vibration-damping ship pipe clamp and support frame assembly is a cylindrical helical extension spring with centrally curled ring ends, and such a spring is very mature in manufacturing technology and also highly stable in quality.
Owner:连云港苏茂船舶技术服务有限公司
LED lamp for sound box
InactiveCN103414963AIncrease cooling areaReduce vibration displacementPoint-like light sourceElectric circuit arrangementsLED lampSound box
The invention discloses an LED lamp for a sound box. The LED lamp comprises an LED assembly, a horn, a casing and a power supply module. The LED assembly and the horn are assembled on the casing, and a tone leading tube is arranged on the casing. Compared with the prior art, the LED lamp is provided with the tone leading tube on the casing, so that bandwidth can be expanded, and bass can be improved; the vibration displacement of the horn can be reduced, and therefore the horn is protected. In addition, an interval is reserved between the tone leading tube and the bottom surface of the casing, therefore, heat of the power supply module can be conducted out by the tone leading tube after the casing and a base of the power supply module are assembled together, additionally, a lamp cover is in a hollowed-out shape, the tone leading tube enables an inner space (a power supply cavity) in the base to be communicated with the outside air completely, accordingly, air convention in the LED lamp for the sound box is assisted, the heat dissipation area of the casing is increased, and the heat dissipation effect is good.
Owner:ZHEJIANG SHENGHUI LIGHTING
Vibration suppression method of rolling mill roll system with vibration absorber device
ActiveCN107185966AReduce vibration displacementImprove stabilityNon-rotating vibration suppressionRolling equipment maintainenceTime domainSpring force
The invention discloses a vibration suppression method of a rolling mill roll system with a vibration absorber device. The method comprises the steps that at first, a rolling mill system vibration model which comprises the vibration absorber device and acts together with the rolling mill rolling system is set up; according to the set-up rolling mill roll system vibration model with the vibration absorber device, a two-freedom-degree system function and an amplitude frequency equation of the system are obtained; time-domain characteristic curves and amplitude-versus-frequency curves before and after the control vibration absorber is added are obtained in a simulation manner, and the influence to the amplitude-versus-frequency curves from mass of the vibration absorber, spring force and friction force is analyzed in a simulation manner. According to the method, by means of the time-domain characteristic and the amplitude-versus-frequency characteristic, the mutual influence relation between the vibration absorber device and the rolling mill roll system is obtained, the mass of the vibration absorber device, rigidity of an elastic element and the size of friction coefficients of a damping element are adjusted properly, the effects of reducing vibration displacement of the rolling mill roll system and restraining vibration of the rolling mill roll system can be achieved, thus, the stability of the rolling mill system is improved, and a new solution method is provided for controlling the stability of the rolling mill roll system.
Owner:YANSHAN UNIV
Female joint of coaxial cable connector
ActiveCN101699670AReduce vibration displacementEasy to assembleElectrically conductive connectionsCoupling contact membersElectrical conductorCoaxial cable
The invention discloses a female joint of a coaxial cable connector, which comprises a central conductor, an insulator and an outer conductor; the central conductor is provided with a concave jack and a deep hole used for inserting an inner conductor of coaxial cable; the insulator is a circular ring with a through hole in the center; the external diameter of the front end part of the insulator is less than the external diameter of the rear end part; the outer conductor is divided into a front section, a middle section and a rear section; the front section is provided with an annular socket facing towards the front end; the internal diameter of the rear section is used for inserting the coaxial cable; the internal diameter of the front section is equal to the internal diameter of the middle section and matched with the external diameter of the rear end part of the insulator; the internal surface of the middle section is transited to the internal surface of the rear section through a first step; the internal diameter of the through hole of the insulator is matched with the external diameter of the concave jack of the central conductor; the central conductor can be integrally inserted into the through hole of the insulator; and the outer circumference at the rear end part of the central conductor is provided with a contractive compensating groove. The female joint meets the conventional technical standards; the central conductor is wholly inserted into the through hole of the insulator from the rear end and is stably fixed, so, the female joint is more convenient to assemble.
Owner:ROSENBERGER ASIA PACIFIC ELECTRONIC CO LTD
Thin film microcircuit cutting method based on sacrificial layer
InactiveCN103402313AHigh bonding strengthReduce vibration displacementPrinted circuit manufactureEpoxyConduction band
The invention provides a thin film microcircuit cutting method based on a sacrificial layer. The method solves the problem that a thin film microcircuit falls off during cutting, reduces the situation that the edge of the circuit is cracked curing cutting, can improve the warping of circuit conduction bands on the edges of the cut circuit and can improve the cutting quality of the circuit. The cutting method comprises the steps of providing a complete thin film circuit with at least one side which is fully metallized by Au; electroplating an Ni layer on the Au fully-metallized side of the thin film circuit; bonding the thin film circuit substrate plated with the Ni layer on a glass substrate by using epoxy resin glue; cutting the thin film circuit substrate; and eroding the Ni layer. Since the bonding strength of the epoxy resin glue is high, the thin film circuit does fall off during cutting, the vibration displacement of the ceramic thin film circuit substrate during cutting is small and the situation that the ceramic thin film circuit substrate is cracked during cutting can be reduced.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP
An apparatus and method for reducing vibration of a split-core reactor from a body
ActiveCN109148099AReduce vibrationReduce vibration displacementTransformers/inductances noise dampingInductances/transformers/magnets manufactureSiliconMagnetostriction
The invention provides an apparatus and a method for reducing vibration of a split-core reactor from a body, Starting from the origin of the electromagnetic vibration of the iron core, namely magnetostriction, the vibration displacement of the iron core is reduced by using the staggered assembly of oriented silicon steel sheets and non-oriented silicon steel sheets, and by using the opposite magnetostriction effect of oriented silicon steel and non-oriented silicon steel in service.
Owner:TIANJIN POLYTECHNIC UNIV
Mounting method of engine suspension device for four-cylinder diesel engine
InactiveCN104163095AHigh strengthReduce vibration accelerationJet propulsion mountingInternal combustion mountingDiesel engineScrew head
The invention discloses a mounting method of an engine suspension device for a four-cylinder diesel engine. The mounting method comprises the steps that a connecting screw, a screw shaft sleeve, a lower damping rubber mat and an upper damping rubber mat are sequentially mounted on a diesel engine bracket; the engine suspension device is screwed through a screw head of the connecting screw, wherein in the screwing process, the upper damping rubber mat and the lower damping rubber mat are compressed; screwing is not stopped until the upper damping rubber mat and the lower damping rubber mat after combination are compressed to the height equaling the height of the screw shaft sleeve, in other words, the upper end face of the screw shaft sleeve is flush with the upper end face of the upper damping rubber mat, and mounting is completed. The mounting method is combined with the structure of the engine suspension deice, the reasonable steps are adopted, in this way, the mounting position is accurate, and the mounted engine suspension device have an excellent damping effect.
Owner:LIUZHOU XINGTA IND & TRADE
Female joint of coaxial cable connector
ActiveCN101699670BReduce vibration displacementEasy to assembleElectrically conductive connectionsCoupling contact membersCoaxial cableElectrical conductor
The invention discloses a female joint of a coaxial cable connector, which comprises a central conductor, an insulator and an outer conductor; the central conductor is provided with a concave jack and a deep hole used for inserting an inner conductor of coaxial cable; the insulator is a circular ring with a through hole in the center; the external diameter of the front end part of the insulator is less than the external diameter of the rear end part; the outer conductor is divided into a front section, a middle section and a rear section; the front section is provided with an annular socket facing towards the front end; the internal diameter of the rear section is used for inserting the coaxial cable; the internal diameter of the front section is equal to the internal diameter of the middle section and matched with the external diameter of the rear end part of the insulator; the internal surface of the middle section is transited to the internal surface of the rear section through a first step; the internal diameter of the through hole of the insulator is matched with the external diameter of the concave jack of the central conductor; the central conductor can be integrally inserted into the through hole of the insulator; and the outer circumference at the rear end part of the central conductor is provided with a contractive compensating groove. The female joint meets the conventional technical standards; the central conductor is wholly inserted into the through hole of the insulator from the rear end and is stably fixed, so, the female joint is more convenient to assemble.
Owner:ROSENBERGER ASIA PACIFIC ELECTRONIC CO LTD
Running socks with foot arch support function
ActiveCN105476076AIncrease elasticityStrong sense of oppressionPanty-hoseHosieryCushioningEngineering
The invention relates to the field of functional structures of socks and discloses running socks with a foot arch support function. Each sock comprises a foot arch support device corresponding to a foot arch part of a human body, wherein the foot arch support device comprises two parts, one part is an elastic band structure corresponding to an instep of the human body, and the other part is a sole support structure corresponding to a sole of the human body. According to the foot arch support device, a foot arch structure is supported through matching of the two parts, the elastic band structure above the instep provides sufficiently strong elasticity, the apex of the foot arch is pressed while the pressing sense is not so strong, and enough pressure and cushioning force are provided for the foot arch. The sole support structure below the sole can support the corresponding foot arch of the human body and reduce the pressure of the foot arch, then enough support is provided for the foot arch during sports, and injury and deformation of the foot arch are prevented. Besides, better benefit increasing effect can be realized through combination of structural change with novel materials.
Owner:杭州悍将体育科技有限公司
Structural mode identification method based on computer vision and variational mode decomposition
ActiveCN113128474AHigh precisionSolve the limited measurement pointsSustainable transportationCharacter and pattern recognitionFrequency domain decompositionEngineering
The invention discloses a structural mode identification method based on computer vision and variational mode decomposition, and the method comprises the steps of collecting a vibration video of a structural object, and selecting pixel points meeting a preset pixel level in the vibration video as feature points; calculating the speed of each selected feature point by using a Farneback dense optical flow algorithm; calculating the speed and acceleration of each feature point in a real ground coordinate system by using a scale transformation mode to obtain an acceleration signal of a non-stationary sequence; performing noise reduction processing on the acceleration signal by using a variational mode decomposition method; and recognizing the acceleration signal after noise reduction processing by using a frequency domain decomposition method to obtain the vibration characteristics of the structure in each order mode. According to the invention, the vibration video of the structure is calculated and multi-modal extracted by using the improved optical flow algorithm in a non-contact manner, so that the real-time, efficient and low-cost detection of the dynamic characteristics of the structure is realized.
Owner:CHONGQING UNIV
Sensor
InactiveUS20200386624A1Reduce vibration displacementLittle vibration displacementThermometer detailsTemperature measurement in motorsCylinder blockMechanical engineering
Disclosed is a sensor, comprising: a housing; a detecting element provided inside the housing; a first cylinder provided inside the housing and sleeved outside the detecting element, the first cylinder having an amount of elastic deformation in a direction intersecting a surface around the detecting element; a particle filler, for filling an inner cavity of the housing. When external environment produces mechanical shock to the sensor or the sensor produces mechanical vibration, the limiting action of the first cylinder and the particle filler enables the detecting element to only have very little vibration displacement or even no vibration displacement with respect to the housing. The external mechanical shock can be partially or completely absorbed by the first cylinder and the particle filler, so as to reduce vibration displacement of the detecting element caused by the shock.
Owner:SUZHOU EV BLUE ELECTRONICS TECH CO LTD
Vibration loudspeaker
ActiveCN103067834BSave and utilize internal spaceReduce thicknessElectrical transducersWork performanceLoudspeaker
Owner:GOERTEK INC
Sliding rail type air composite suspension
PendingCN114393966ASimple structureSave design spaceResilient suspensionsVehicle springsAir springGas spring
The invention discloses a sliding rail type air composite suspension, and aims to provide a novel multifunctional composite suspension structure which can effectively reduce vibration of a vehicle body, can adjust the minimum ground clearance, and is simple in structure and convenient to install. The device comprises a swing arm supporting frame, an air spring, an air spring air storage tank, a displacement sensor and an electric control unit. According to the sliding rail type air composite suspension structure designed by the invention, the swing arm support frame can move up and down to absorb the vibration of the tire to an axle when the tire is excited by a road surface to generate a large amount of vibration, so that the vibration of a vehicle body is effectively reduced, and the handling stability and the running smoothness of a vehicle are improved; and meanwhile, the electric control unit sends an inflation or deflation instruction to the air spring according to an identification signal of the displacement sensor, so that the trafficability and the high-speed stability are effectively improved.
Owner:SHANDONG UNIV OF TECH
A method for suppressing vibration of rolling mill roll system with vibration absorber device
ActiveCN107185966BReduce vibration displacementImprove stabilityNon-rotating vibration suppressionRolling equipment maintainenceTime domainClassical mechanics
The invention discloses a vibration suppression method of a rolling mill roll system with a vibration absorber device. The method comprises the steps that at first, a rolling mill system vibration model which comprises the vibration absorber device and acts together with the rolling mill rolling system is set up; according to the set-up rolling mill roll system vibration model with the vibration absorber device, a two-freedom-degree system function and an amplitude frequency equation of the system are obtained; time-domain characteristic curves and amplitude-versus-frequency curves before and after the control vibration absorber is added are obtained in a simulation manner, and the influence to the amplitude-versus-frequency curves from mass of the vibration absorber, spring force and friction force is analyzed in a simulation manner. According to the method, by means of the time-domain characteristic and the amplitude-versus-frequency characteristic, the mutual influence relation between the vibration absorber device and the rolling mill roll system is obtained, the mass of the vibration absorber device, rigidity of an elastic element and the size of friction coefficients of a damping element are adjusted properly, the effects of reducing vibration displacement of the rolling mill roll system and restraining vibration of the rolling mill roll system can be achieved, thus, the stability of the rolling mill system is improved, and a new solution method is provided for controlling the stability of the rolling mill roll system.
Owner:YANSHAN UNIV
Light reflection device for track inspection trolley
ActiveCN104154866AReduce vibration displacementMeet the precision requirementsUsing optical meansRailway auxillary equipmentBogieLight reflection
The invention relates to a light reflection device for a track inspection trolley. The light reflection device comprises a base plate fixed to the shaft end of a bogie of the track inspection trolley, the top end of the base plate extends out to form a light reflection plate in the direction of being far away from the bogie, the light reflection plate is perpendicular to the base plate, and the light reflection plate and the base plate are integrally molded. One end of a supporting piece is fixedly connected to the side, far away from the bogie, of the base plate, and the other end of the supporting piece is fixedly connected with the bottom face of the light reflection plate. The light reflection device is durable under high-frequency vibrations, vibration displacement of a light reflection working face is small, and the accuracy requirement is met.
Owner:CRRC NANJING PUZHEN CO LTD
Bridge crane with high-speed assembly
PendingCN112573383AReduce vibration displacementReduce dynamic load impactTravelling cranesTravelling gearVehicle frameWire rope
The invention relates to a bridge crane with a high-speed assembly. The bridge crane comprises a bridge frame, a trolley, a lifting mechanism and a lifting appliance (19), wherein the trolley, the lifting mechanism and the lifting appliance (19) are arranged on the bridge frame. The trolley comprises a frame (1), walking wheels (3) and horizontal guide wheels (17). The lifting mechanism comprisesa steel wire rope and a winding assembly. Wheel high-speed vibration reduction assemblies (2) are arranged on the walking wheels (3). Lateral high-speed vibration reduction assemblies (18) are arranged on the horizontal guide wheels (17). A trolley high-speed traction assembly (15) is arranged on the frame (1). A cabin hanging protection and vibration reduction assembly (14) is arranged on the lifting winding assembly. A lifting appliance rapid stabilization assembly is arranged on the lifting appliance (19). Compared with the prior art, the bridge crane has the beneficial effects that the lifting speed of the crane and the horizontal running speed of the trolley are greatly increased, the structural vibration displacement of the crane is obviously reduced, the whole crane runs more stably, and the production efficiency is greatly improved.
Owner:上海澳傅旭海洋装备技术有限公司
A kind of micro thin film circuit cutting method
InactiveCN103402313BHigh bonding strengthReduce vibration displacementPrinted circuit manufactureEpoxyConduction band
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP
An intelligent ultrasonic scalpel for tumor treatment
Owner:江苏怡龙医疗科技有限公司
A blast furnace tuyere protection device
Owner:SHAGANG GROUP +2
Controllable air static pressure radial bearing system
The invention discloses a controllable air static pressure radial bearing, and relates to a vibration detection and control system in the working process of an air static pressure main shaft. The system is provided with an air static pressure main shaft system, four piezoelectric ceramics, four eddy current sensors and an upper computer. The four piezoelectric ceramics are installed on a bearing shell through a clamping device, the other ends of the piezoelectric ceramics act on bearing bushes, elastic supporting devices are arranged in gaps between the bearing bushes at the two ends of the bearing and the shell, the four eddy current sensors are vertically distributed at the two ends of the main shaft in pairs, and the eddy current sensors receive vibration signals. The vibration signals are converted into corresponding control voltage signals by the upper computer to act on the piezoelectric ceramics, and the piezoelectric ceramics generate corresponding displacement to push the movable bearing bushes to extrude an air film to generate air film force to inhibit vibration of the main shaft.
Owner:BEIJING UNIV OF TECH
Explosion-proof motor base adopting ejection line structure
PendingCN110855061AReduce temperature riseReduce the overall heightSupports/enclosures/casingsElectric machineryStructural engineering
The invention discloses an explosion-proof motor base adopting an ejection line structure. The explosion-proof motor base comprises a main junction box base, an auxiliary junction box base and coolingfins. A plurality of ventilating ducts are distributed in the base and arranged in a certain mode; and the connecting positions of the ventilating ducts and a base barrel adopt a variable-thickness structure. Under the premise of not increasing the weight and the center height of the base and ensuring the structural strength of the motor, the radial rigidity of the base structure is improved by adopting a special technical means so as to achieve a shockproof purpose; and meanwhile, the internal ventilation sectional area of the base is increased by adopting a special structural design so as to greatly and effectively improve the internal and external heat exchange efficiency of the base, effectively prolong the service life of the motor and guarantee the operation safety.
Owner:WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD +1
Floor slab thickness control device and using method thereof
InactiveCN107842201AReduced strengthControl thicknessBuilding material handlingFloor slabEngineering
The invention discloses a floor slab thickness control device and a using method thereof. The floor slab thickness control device comprises same-plate-thickness prefabricated cylinder hollow concreteblocks, fixing screws, anchoring steel pieces and hexagonal flange nuts. In use, floor slab steel bars are completely bound firstly, anchoring holes are drilled in floor slab formworks every 2 m, andthe cylinder hollow concrete blocks are placed on the anchoring holes; and the anchoring screws penetrate into the formwork holes from the interiors of the hollow concrete blocks and fastened throughthe hexagonal nuts at the bottoms of the formworks. In concrete pouring, the top face of the concrete is manually smeared by workers till the elevation achieves the situation that upper openings of the hollow concrete blocks are flush with one another, and then slab-thickness control work can be completed. The prefabricated cylinder hollow concrete blocks serve as the floor slab thickness controldevice and have the characteristics that mounting is convenient, anchoring is firm in the concrete pouring process, moving is not prone to occurring, and the floor slab thickness control accuracy is high, anchoring bolts can be reused, the maintenance cost is reduced, and meanwhile materials are also saved.
Owner:CHINA CONSTR 4TH ENG BUREAU 6TH
A kind of penetrating part of vibration-damping ship pipeline
ActiveCN106015761BImprove vibration damping effectAdjust the damping capacityNon-rotating vibration suppressionPipesStress concentrationEngineering
Owner:HUAIHAI INST OF TECH
Laundry treatment device
ActiveCN107587312BAbsorb vibrationVibration absorption increasedNon-rotating vibration suppressionOther washing machinesEngineeringAeroshell
Owner:LG ELECTRONICS INC
Damping-adjustable silicon micro tuning fork resonant accelerometer structure
ActiveCN112881753AReduce vibration displacementSmall temperature coefficientAcceleration measurementTuning forkAccelerometer
The invention discloses a damping-adjustable silicon micro tuning fork resonant accelerometer structure. An acceleration structure is arranged on a middle monocrystalline silicon piece of three-layer monocrystalline silicon, and the structure comprises a mass block, two resonators, four micro lever amplification mechanisms, a stress release mechanism, a plurality of supporting beams, a plurality of damping adjusting mechanisms and a plurality of fixed bases. The damping adjusting mechanisms are uniformly distributed on the mass block. The two resonators are symmetrically arranged in the middle of the mass block relative to the x axis, and the micro-lever amplification mechanism is located between the two resonators. One ends of the inner sides of the two resonators are connected with the output ends of two micro-levers respectively, and the fulcrum ends of the two micro-levers connected with the same resonator are connected to the same stress release mechanism and then connected with the corresponding fixed base. The input ends of the micro-lever mechanisms are connected with the mass block, the mass block is connected with the fixed bases through the supporting beams, and the fixed bases are connected with the fixed bases of the upper-layer monocrystalline silicon and the fixed bases of the lower-layer monocrystalline silicon. The temperature coefficient of the frequency is reduced, and the damping is adjustable.
Owner:NANJING UNIV OF SCI & TECH
Running socks with arch support
ActiveCN105476076BIncrease elasticityStrong sense of oppressionPanty-hoseHosieryCushioningFoot Arch Supports
Owner:杭州悍将体育科技有限公司
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