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36results about How to "Eliminate resonance phenomenon" patented technology
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Electromagnetic drive resonance phonation device
InactiveCN101472210AEliminate resonance phenomenonSimple structureElectrical transducersElastomerResonance
The invention relates to a resonance sound-generating device through an electromagnetic driving manner. A bearing piece (2) is arranged in an outer casing (1); a permanent magnet (3) is arranged in the bearing piece (2); a voice coil suspension (8) is arranged at the outer periphery of the permanent magnet (3); and a drive voice coil (7) is arranged on the voice coil suspension (8). The invention is characterized in that a vibration end cover (6) is connected with one end of the outer casing (1), and the voice coil suspension (8) is fixedly connected with the vibration end cover (6), so as to enable the vibration generated by the voice coil suspension (8) to be transferred to the vibration end cover (6); and a first elastomer(7), a second elastomer (8), and a third elastomer (9) are arranged in the casing. After the structure is adopted, the drive voice coil is utilized to be input with sound signals, so as to enable the voice coil suspension in the magnetic field of the permanent magnet to generate axial vibration, thereby transferring electric signals into the mechanical vibration; and the vibration is transferred to a flat plate through the vibration end cover, so as to drive the flat plate to be in resonant and generate the sound. Furthermore, the invention has the advantages of simple structure, small volume, wide vocal range, and convenient manufacture and assembly.
Owner:王广林
Crane, and vibration self-stabilizing control method, device and system
InactiveCN103148162AEasy to detectRealize regulationVibration suppression adjustmentsLoad-engaging elementsResonanceAcoustics
The invention discloses a crane, and a vibration self-stabilizing control method, a device, and a system. The vibration self-stabilizing control method comprises the steps that dynamic response signals of execution components on an engineering machine are acquired, analyzed, and identified; a system vibration frequency is acquired; an excitation frequency and a position of an excitation source are acquired when the engineering machine works; the execution components correspondingly driven by the excitation source are determined by the position of the excitation source; whether the system vibration frequency and the excitation frequency corresponding to the system vibration frequency resonate is judged; and an adjustment signal is sent, and the excitation frequency is adjusted when resonance occurs. Therefore, with the adoption of the method, the resonance can be detected timely and eliminated timely on the engineering machine.
Owner:SANY AUTOMOBILE HOISTING MACHINERY
Combined machining tool for molded surfaces of deep cavities among drum webs and machining method of combined machining tool
InactiveCN103586494AImprove reliabilityMeet the design size requirementsTurning toolsMachine toolMachining
The invention belongs to the technical field of machining, particularly relates to a combined machining tool for molded surfaces of deep cavities among drum webs and a machining method of the combined machining tool. By the combined machining tool, the technical problems of vibration, tool collision and poor surface quality during machining of the molded surfaces of the deep cavities among the drum webs of aero-engines are solved. The combined machining tool comprises a middle plate-shaped tool, an upper plate-shaped tool and a lower plate-shaped tool. The machining method includes the following steps: step 1, fixedly connecting a transfer tool with a numerically-controlled vertical turning tool clamp; step 2, machining middle molded surfaces of the deep cavities among the drum webs; step 3, machining upper molded surfaces and upper arc-shaped molded surfaces of the deep cavities among the drum webs; step 4, machining lower molded surfaces and lower arc-shaped molded surfaces of the deep cavities among the drum webs to complete machining of primary inner cavities; step 5, circularly performing the step 2 to the step 4 to sequentially complete machining of each-level inner cavities.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
A Transmissive Fiber Optic Turbulence Sensor
InactiveCN102288578AEasy compositionAccurate detectionPhase-affecting property measurementsSensor arrayFrequency spectrum
The invention discloses a transmission type optical fiber turbulence sensor. The transmission type optical fiber turbulence sensor comprises a vibration isolator and a bracket, wherein a connecting rod on the upper part of the vibration isolator supports the bracket; a supporting rod on the lower part of the vibration isolator is arranged on the pedestal; the bracket consists of a forked plate and symmetrical forked arms; two paths of optical fiber are arranged on the forked plate; one end of the each path of optical fiber is led to the end of each forked arm; an optical fiber collimator is connected with the end of each forked arm; the other end of the optical fiber is led out of the forked plate and is connected with an optical fiber connector; each path of optical fiber is connected with an optical fiber coupler and an optical isolator; and the optical fiber couplers of the two paths of optical fiber are connected with each other through the optical fiber. Based on the laser interference measurement principle, the transmission type optical fiber turbulence sensor has the characteristics of high precision, quick response, small volume, high stability, corrosion resistance, convenience of forming sensor arrays and the like. The transmission type optical fiber turbulence sensor can precisely detect tiny refractive index change of atmospheric optical turbulence, and related optical turbulence intensity, time and spatial frequency spectrum and the like.
Owner:ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Draught fan absorber and draught fan
ActiveCN105201923AReduce vibrationReduce running noisePump componentsPump installationsImpellerDrive wheel
The invention discloses a draught fan absorber and a draught fan. The draught fan absorber comprises a drive wheel used for transmission connection with a motor of the draught fan, a driven wheel used for transmission connection with an impeller of the draught fan, a first transmission part fixed to the drive wheel, a second transmission part fixed to the driven wheel, and a vibration reduction part connected with the first transmission part and the second transmission part along the circumference direction of the drive wheel, wherein the drive wheel and the driven wheel are relatively fixed along an axial direction, a placing cavity is formed between the driven wheel and the drive wheel, the first transmission part, the vibration reduction part and the second transmission part are all located in the placing cavity, and the drive wheel drives the driven wheel to rotate by the first transmission part, the vibration reduction part and the second transmission part. According to the draught fan absorber disclosed by the invention, vibration is reduced by the vibration reduction part in a torque transmitting process, and the vibration of the draught fan is reduced, thus reducing the running noise of the draught fan and improving the performance of the draught fan.
Owner:GREE ELECTRIC APPLIANCES INC
Suspension device of automotive exhaust system capable of adjusting angle of lifting lug
InactiveCN101830164AEasy to adjustRealize a wide range of adjustmentPropulsion unit gas exhaustCockpitAutomotive engineering
The invention discloses a suspension device of an automotive exhaust system capable of adjusting the angle of a lifting lug, comprising the lifting lug, a connection pin I, a connection pin II, a support I provided with a chute and a support II provided with a chute, wherein, the connection pin I and the connection pin II are connected with the support I and the support II through the chutes, andare connected with the lifting lug. The suspension device of the invention can conveniently adjust the installation angle of the lifting lug relative to the automotive body, can adjust the lifting lug at any time according to actual conditions, and eliminates covibration to the greatest extent, thus leading the transmission amount of the vibration of the exhaust system to the automobile body to reach the lowest value, improving comfort of a control cabin, reducing noise pollution and prolonging the service life of the suspension device; and meanwhile, when a vibration test of the exhaust system is performed, multiple different suspension devices need not to be manufactured, thus large scale adjustment of the lifting lug angle is realized, thereby realizing tests of lifting lugs at different installation angles, which has an important significance in improving work efficiency, shortening development cycle and lowering development cost in the development process of automobiles.
Owner:CHONGQING UNIV
Brake device and brake method for vibratory screen motor of asphalt mixing station
ActiveCN103441710AEliminate resonance phenomenonReduce the amplitudeAc motor stoppersAutomotive engineeringTime based
The invention belongs to the field for a motor brake technology, and particularly relates to the field of a brake technology which is applied to a vibratory screen motor of an asphalt concrete stirring apparatus. According to the characteristics of the vibratory screen of an asphalt mixing station, a timing controller is utilized for accurate control over the time of connection with a reverse phase sequence power supply and the time of reversal connection brake, and a brake power supply is connected or removed based on the time. Compared to the prior art, the brake device and the brake method provided by the invention can eliminate the resonance vibration during the shutdown process of the vibratory screen, the stable shutdown of the vibratory screen and a main building apparatus can be realized, the service life of the vibratory screen and the main building apparatus is prolonged, and the shutdown time is reduced by over 60%, thus the apparatus can be put into production again, and the production efficiency is improved.
Owner:XUZHOU XCMG MAINTENANCE MACHINERY CO LTD
Automobile constant speed driving shaft
ActiveCN104179811AImprove NVH performanceEliminate peaksRotating vibration suppressionYielding couplingLeft halfNoise, vibration, and harshness
The invention relates to an automobile constant speed driving shaft. The automobile constant speed driving shaft comprises a left half axle and a right half axle, wherein the left end of the left half axle is assembled with a left side wheel through a left half axle fixed knot, the right end of the left half axle is assembled with a left side half axle gear of a differential mechanism in a power transmission device through a left half axle moving knot, the left end of the right half axle is assembled with a right side half axle gear of the differential mechanism in the power transmission device through a right half axle moving knot, the right end of the right half axle is assembled with a right side wheel through a right half axle fixed knot, the right half axle is of a hollow axle tube structure, the left half axle is of a solid rod axle structure, the length of the right half axle hollow axle tube is X, the length of the left half axle solid rod axle is Y, X is greater than Y, the torsion rigidity of the right half axle is K right, the torsion rigidity of the left half axle is K left, and the K right is equal to the K left. The automobile constant speed driving shaft not only solves the off-tracking problem during dynamic load acceleration running of the whole vehicle caused by inconsistent torsion angles of the left half axle and the right half axle, but also eliminates resonance phenomenon caused by different rotating speed working conditions of the engine, so that the NVH (Noise Vibration and Harshness) performances and economical performance of the vehicle are improved.
Owner:精诚工科汽车系统有限公司
Frequency-expanding absorber based on intelligent stiffness element and controlling method thereof
ActiveCN107606026AFast response to stiffness adjustmentWide frequency range of vibration reductionRubber-like material springsShock absorbersElastomerVibration control
The invention relates to the field of vibration control, in particular to a frequency-expanding absorber based on an intelligent stiffness element and a controlling method thereof. The frequency-expanding absorber comprises an absorber body and a controlling system, the absorber body comprises a high conductive magnetic mounting seat, a magneto-rheological elastomer and a high conductive magneticvibration absorbing block which are mounted from inside to outside in a sleeving mode, and a central column for connecting a controlled system is arranged in the central position of the high conductive magnetic mounting seat; and one end of the central column is connected with the inner circumference of the high conductive magnetic mounting seat through a plurality of rib strips evenly distributedin the radial direction of the central column, and a magnet excitation coil is wound on any of the rib strips; and the controlling system comprises an accelerated sensor, a controller and a controllable direct-current power supply. The frequency-expanding absorber based on an intelligent stiffness element is fast in response, wide in vibration absorption frequency spectrum and effectively avoidsnew resonance phenomenon caused by introduction of the vibration absorber.
Owner:LUOYANG INST OF SCI & TECH
Automatic fire extinguishing system
InactiveCN102462919AEliminate resonance phenomenonAvoid Secondary DisastersFire rescueFire alarmsEngineeringResonance
The invention provides an automatic fire extinguishing system. With the system, a problem of resonance easily caused by a plurality of simultaneously operating extinguishing devices in the system is solved. The automatic fire extinguishing system provided by the invention comprises an induction apparatus, a fire alarm controller, a gas fire-extinguishing control panel, a starting module, an extinguishing device, and a damper. According to the automatic fire extinguishing system provided by the invention, all extinguishing devices in a preset protected zone are started sequentially, such that the phenomenon of resonance is avoided, and a secondary disaster caused by the resonance phenomenon is avoided. Therefore, life and property safeties in the preset protected zone are ensured.
Owner:锦江区悦丰家具配件厂
Method for fast eliminating power system ferroresonance
InactiveCN103199553AEliminate resonance phenomenonPower oscillations reduction/preventionOvervoltageWiring diagram
Power system ferroresonance is a nonlinearity electromagnetic phenomenon. Ferroresonance can be simulated by change of operation methods of a power system and operation of system equipment. Long-time overvoltage and overcurrent produced by the ferroresonance threaten the safety of the power system greatly. The method for fast eliminating the power system ferroresonance comprises a first step of giving a model of providing one-phase ferroresonance equivalent linear timevariant and a state equation of an equivalent circuit according to a transformer substation wiring diagram of the ferroresonance, and a second step of eliminating the one-phase ferromagnetic resonance phenomena by utilizing of a simplest controller, and a third step of verifying correctness of a conclusion through experiments.
Owner:王少夫
Fuel accelerator of internal combustion engine
InactiveCN103867353AIncrease the magnetic field strengthExpand the effective rangeInternal combustion piston enginesCombustion-air/fuel-air treatmentIsolation layerMagnetic poles
The invention discloses a fuel accelerator of an internal combustion engine. The fuel accelerator comprises a magnetizer and is characterized in that the magnetizer comprises two permanent magnets arranged in a shell, wherein different magnetic poles of the two permanent magnets are correspondingly superposed, the end surfaces of magnetic poles of one permanent magnet correspond to oil tubes, are provided with shielding layers and are superposed with the end surfaces of magnetic poles of the other permanent magnet; isolation layers are arranged between the shielding layers and the end surfaces of the magnetic poles; the middle parts of the isolation layers are provided with through holes. The fuel accelerator is provided with two magnets, and is high in magnetic field intensity; magnetic lines facing to the oil tubes are not shielded, effective magnetic lines can be fully utilized, the surface utilization ratio of the magnetic poles is high, the effective range is large, the action time is long, and the oil-saving and emission-reducing effects are better.
Owner:刘华
Apparatus And Method Of Reducing Vibrations In Washing Machine
InactiveCN104746297AAvoid vibrationAvoid noiseVibration measurement in solidsMechanical oscillations controlMotor driveResonance
The present disclosure relates to an apparatus and a method of reducing vibrations in a washing machine, and particularly, to an apparatus and a method of reducing vibrations in a washing machine that may predict a resonance frequency (or vibration generation region) before operating or driving a motor during a washing process to prevent a resonance phenomenon, thereby reducing noise and vibrations in the washing machine. To this end, the apparatus may include a motor configured to transmit rotational force; a motor driving unit configured to output a motor driving signal controlling an operation of the motor; and a filter configured to remove or reject a frequency or band causing a resonance phenomenon of the washing machine and allow another frequency or band to pass through in the motor driving signal output.
Owner:DONGBU DAEWOO ELECTRONCIS CORP
Connected building
PendingCN111411692AReduce translationReduce movement distanceProtective buildings/sheltersExtraordinary structuresArchitectural engineeringLap joint
The invention relates to a connected building. The connected building comprises main frame structures, orridor structures, longitudinal limiting components and transverse limiting components; two or more main frame structures are arranged side by side, the corridor structures are arranged between every two adjacent main frame structures, and the ends of the corridor structures are in lap joint with the main frame structures through buffer limiting structures; the longitudinal limiting components are arranged on the side edges of the buffering limiting structures and used for limiting longitudinal translation of the corridor structures in the length direction; the transverse limiting components are arranged on the side edges of the buffering limiting structures and used for limiting transverse translation of the corridor structures in the width direction; and the limiting directions of the two longitudinal limiting components located at the two ends of the corridor structures are opposite, and the limiting directions of the two transverse limiting components located at the two ends of the corridor structures are opposite. According to the connected building, the corridor structuresdo not affect the main frame structures, can be firmly connected with the main frame structures and are not prone to falling off from the main frame structures.
Owner:TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
Driven plate of clutch and clutch
ActiveCN108953414AEliminate resonance phenomenonReduce noise pollutionFriction clutchesCouplingsResonanceEngineering
The invention provides a driven plate of a clutch and the clutch. The driven plate of the clutch comprises a plate hub, a driven plate body and damping springs, wherein the plate hub and the driven plate body are coaxially arranged. The plate hub comprises a hub core and a plate hub flange coaxially arranged outside the hub core. The driven plate body is provided with a plurality of first holes which are circumferentially distributed. The plate hub flange is provided with a plurality of second holes which are circumferentially distributed. The first holes and the second holes are axially opposite. The damping springs are arranged in the first holes and the second holes and have pre-tightening force. In the elastic deformation direction, the first end of the first type of damping springs abut against the side walls of the first holes, the second end of the first type of damping springs abut against the side walls of the second holes, the first end of the second type of damping springs abut against the side walls of the second holes, and the second end of the second type of damping springs abut against the side walls of the first holes. In the circumferential direction, the force borne by the driven plate body from the first type of damping forces and the force borne by the driven plate body from the second type damping forces are identical in magnitude and opposite in direction.The driven plate of the clutch is free of idle travel, and the resonance phenomenon caused by the idle travel can be eliminated.
Owner:SCHAEFFLER TECH AG & CO KG
Signal synchronization control method and apparatus
ActiveCN108123705AReduce in quantityEliminate resonance phenomenonPulse shapingResonanceSynchronous control
The invention provides a signal synchronization control method and apparatus. The signal synchronization control method comprises the following steps: collecting digital logic signals and synchronousclock signals corresponding to the digital logic signals, judging whether the digital logic signals have a resonance phenomenon, and when the digital logic signals have the resonance phenomenon, adjusting the duty ratios of the digital logic signals and the synchronous clock signals according to a preset reference clock to eliminate the resonance phenomenon. By changing the duty ratios of the digital logic signals and the synchronous clock signals, the resonance phenomenon between the digital logic signals is eliminated, the number of the digital logic signals that jump to the falling edge under the triggering on the rising edge of the respective synchronous clock signals can be reduced, and the "resonance" phenomenon is reduced, thereby reducing the electromagnetic interference to an MCUand improving the stability of the system.
Owner:BYD SEMICON CO LTD
A Frequency Extended Vibration Absorber Based on Intelligent Stiffness Components and Its Control Method
ActiveCN107606026BFast response to stiffness adjustmentWide frequency range of vibration reductionRubber-like material springsShock absorbersElastomerFrequency spectrum
Owner:LUOYANG INST OF SCI & TECH
LCL type grid-connected inverter improved weighted average current control method
PendingCN112688586AIncrease the damping factorImprove stabilityAc-dc conversionSingle network parallel feeding arrangementsCapacitanceProportional control
The invention provides a LCL type grid-connected inverter improved weighted average current control method . The control method comprises the following steps: connecting an LCL type filter to the output end of a main circuit of the inverter; multiplying the current given value by the output phase information of the phase-locked loop to obtain a current reference signal, wherein the current reference signal obtains a control signal of the outer loop proportional resonance controller under the action of a feedback signal of the weighted average current of the LCL type filter; adopting a signal of a current signal output by the outer-loop proportional resonance controller under the action of a feedback signal of the filter capacitor current as a control signal of the inner-loop proportional controller, and adopting an output signal of the inner-loop proportional controller as a reference signal of the sine pulse width modulation controller; and adopting the sine pulse width modulation controller for controlling the conduction state of the switching tube of the main circuit. According to the invention, the damping coefficient of the control system is increased, the resonance of the LCL type filter is suppressed, the stability is ensured, and the power factor and the waveform quality of the grid-connected current are hardly influenced.
Owner:河南海格经纬信息技术有限公司
A constant velocity drive shaft of an automobile
ActiveCN104179811BEliminate the problem of deviation caused by different torsion anglesEliminate deviationRotating vibration suppressionYielding couplingVehicle dynamicsDrive shaft
A constant velocity drive shaft of an automobile, including a left half shaft and a right half shaft, wherein the left end of the left half shaft is assembled with the left wheel through the left half shaft fixed joint, and the right end of the left half shaft is connected with the middle differential of the power transmission device through the left half shaft moving joint The left half shaft gear of the transmission is assembled, the left end of the right half shaft is assembled with the right side shaft gear of the differential in the power transmission device through the right half shaft movable joint, and the right end of the right half shaft is connected with the right wheel through the right half shaft fixed joint. Assembly, the right half shaft is a hollow shaft tube structure, the left half shaft is a solid rod shaft structure, the length of the right half shaft hollow shaft tube is X, the length of the left half shaft solid rod shaft is Y, X>Y, the right half shaft The shaft torsional stiffness is K right, the left half shaft torsional stiffness is K left, and K right = K left. The invention not only solves the deviation problem caused by the inconsistency of the torsion angles of the left and right axle shafts when the whole vehicle is running under dynamic load during acceleration, but also eliminates the resonance phenomenon caused by the different speed conditions of the engine, and improves the NVH performance and economic performance of the vehicle.
Owner:精诚工科汽车系统有限公司
Silent air heater
InactiveCN106314080AReduce speedIncrease contact areaAir-treating devicesVehicle heating/cooling devicesImpellerEngineering
The invention provides a silent air heater. The silent air heater comprises a case, wherein the case is internally provided with a fan assembly and a radiator assembly; the radiator assembly is fixed below the case and consists of a radiator, a water feeding pipe and a water discharging pipe; an impeller comprises a hub, a blade handle, connecting plates and blades; one end of the blade handle is rotatably fixed on the hub, and the other end of the blade handle is fixedly provided with two connecting plates; the blades are formed by connecting four profile edges in an end-to-end manner, and the four profile edges are an outer edge, an inner edge, a first outer side edge and a second outer side edge. The silent air heater provided by the invention has the advantages that since one connecting plate is added between the blades and the blade handle, the contact area between the blades and the blade handle is indirectly enlarged, and the vibration between the blades and the blade handle is reduced, so that the noise is reduced; since the blade is rotatably fixed on the hub by a U-shaped bolt, the angle can be adjusted in real time, and the requirements for noise reduction and different operation conditions are met.
Owner:GUILIN FUGANG NEW MATERIAL
Liquid nano detergent and preparation method thereof
PendingCN114214095AImprove performanceQuality improvementLiquid carbonaceous fuelsFuel additivesIsooctyl alcoholFerrocene
The invention provides a liquid nano detergent. The liquid nano detergent is prepared from the following raw material components in parts by weight: 6 parts of base oil, 0.07 part of isooctyl nitrate, 0.35 part of polyoxymethylene dimethyl ether, 0.03 part of a modifier and 1.2 parts of isooctyl alcohol. Wherein the modifier is a mixture of nonylphenol polyoxyethylene ether 3 (OP-3), Mannich alkali and ferrocene according to a mass ratio of 11: 1: 2.5. According to the invention, the polyoxymethylene dimethyl ether is used as a solvent with extremely strong dissolving capacity, so that the polyoxymethylene dimethyl ether and the white oil have a synergistic effect, thereby really realizing liquid nanocrystallization; besides, the inventor discovers that the synergistic effect of polyoxymethylene dimethyl ether and isooctyl nitrate exceeds the simple superposition function of '1 + 1 = 2' in the aspect of improving the cetane number and the oxygen content of the diesel oil, and the synergistic effect of polyoxymethylene dimethyl ether and isooctyl nitrate shows an excellent and outstanding effect in improving the cetane number and the oxygen content of the diesel oil.
Owner:SINOCHEM ENERGY SAVING ENVIRONMENTAL PROTECTION HLDG BEIJING +1
Potential energy automobile
InactiveCN1833905AFire Hazard PreventionShorter braking distanceMechanical propulsion powerVehicular energy storageAlloyGear train
A potential-energy car features that multiple groups of high-strength spiral alloy springs are tightly turned by external force (electric power) for gradually accumulating potential energy and then locked and gradually released by a special control mechanism to drive a gear chain to do work, and the brake system and a particular gear shift unit are linked with a gear train for turning said spiral alloy springs, so changing the braking energy to the potential energy for driving the car.
Owner:王冰
Dimming method of phase-cut dimming control circuit based on LED lamp
ActiveCN104066256BTo achieve dimming effectReduce output voltageElectric light circuit arrangementTransformerEngineering
The invention discloses a phase-sectioning dimming control circuit for an LED lamp and a dimming method of the phase-sectioning dimming control circuit. A logic circuit in the circuit is used for performing multiplication on error amplification signals of input voltages and output currents collected after rectification, phase sectioning is performed on collected rectification voltage signals after phase sectioning is performed on the input voltages, obtained phase-sectioning signals are used for controlling breakover time of a field-effect tube after multiplication is performed on the rectification voltage signals and the output signals of an error amplifier, and the larger the phase sectioning angle is, the smaller the energy transmitted by a transformer is. When a load is constant-voltage characteristic load, output voltages are reduced in the phase sectioning process; when the load is a constant-current characteristic load, the output currents are reduced in the phase sectioning process. According to the phase-sectioning dimming control circuit and the dimming method, on the basis of constant-voltage and constant-current control over power output, the phase-sectioning dimming function is achieved through dummy loads, signal collecting, processing and other means, and therefore the whole circuit system achieves the purpose of compatibility of constant-voltage phase-sectioning dimming and constant-current phase-sectioning dimming.
Owner:WUXI SEASTAR LIGHTING CO LTD
Low-torque linkage double-open fire hydrant
ActiveCN103055461BRelieve pressureEliminate resonance phenomenonFire rescueStructural engineeringValve seat
Owner:WEIFANG YUCHUAN MACHINERY
Supercharger, engine and automobile
InactiveCN107131048AEliminate resonance phenomenonImprove general performanceInternal combustion piston enginesEngine componentsNoise controlPositive pressure
The embodiment of the invention discloses a supercharger, an engine and an automobile. The supercharger comprises a waste gas flow control mechanism and is characterized in that the waste gas flow control mechanism comprises an actuator, the actuator is provided with a counterweight device, the counterweight device comprises at least one balancing weight which is provided with a clamping part, and the counterweight device is arranged on the actuator through the clamping parts. The actuator of the waste gas flow control mechanism is provided with the appropriate counterweight device, the resonance phenomenon of mechanical positive pressure type waste gas by-pass controlling can be eliminated, the noise of the actuator is controlled within the acceptable range of noise, vibration and harshness (NVH) of the finished automobile, universality is high, the period for solving the noise problem is short, and practicality is high.
Rack capable of eliminating resonance of multi-rotor aircraft
InactiveCN104943854AEliminate resonance phenomenonExtended service lifeUndercarriagesFiberControl system
The invention relates to a rack capable of eliminating the resonance of a multi-rotor aircraft. The rack comprises a central plate, wherein two carbon fiber tubes which are horizontally placed and are vertical to each other are arranged on the central plate, and an undercarriage placed horizontally is arranged below the central plate; two adjacent sides of the two carbon fiber tubes are connected by a connecting rod; four brackets distributed in a circumference and in an arc shape are arranged between the central plate and the undercarriage; and reinforcing rods are arranged between two ends of each carbon fiber tube and the undercarriage. According to the rack, two adjacent sides of the two carbon fiber tubes are fixed by the connecting rod, so that the resonance phenomenon generated by a motor is eliminated, and thus the service lives of the aircraft and a flight control system are prolonged.
Owner:苏州绿农航空植保科技有限公司
Resonance resistance type crane double-beam conveying device
InactiveCN105523335AImprove delivery efficiencyImprove connection strengthConveyorsRoller-waysResonanceEngineering
The invention discloses a resonance resistance type crane double-beam conveying device. The device comprises a first cross beam; a speed reducing motor is arranged on one side of one end of the first cross beam, and is connected with a first gear through a shaft; a second cross beam is arranged on the upper side of the first cross beam; a third cross beam is arranged on the upper side of the second cross beam; first rolling shafts are uniformly arranged between the first cross beam and the second cross beam from left to right; second rolling shafts are uniformly arranged between the second cross beam and the third cross beam from left to right; the first rolling shafts and the second rolling shafts penetrate through rotating shafts; multiple first connecting frames are arranged between the first cross beam and the second cross beam; multiple second connecting frames are arranged between the second cross beam and the third cross beam; and the first connecting frames and the second connecting frames are staggered and spaced. The resonance resistance type crane double-beam conveying device has the advantages of convenience for installation, easiness in maintenance, convenience for fixation, simple structure and high reliability.
Owner:ANHUI CHAOSHENG HOISTING MACHINERY CO LTD
Suspension device of automotive exhaust system capable of adjusting angle of lifting lug
InactiveCN101830164BEasy to adjustRealize a wide range of adjustmentPropulsion unit gas exhaustEngineeringCockpit
The invention discloses a suspension device of an automotive exhaust system capable of adjusting the angle of a lifting lug, comprising the lifting lug, a connection pin I, a connection pin II, a support I provided with a chute and a support II provided with a chute, wherein, the connection pin I and the connection pin II are connected with the support I and the support II through the chutes, and are connected with the lifting lug. The suspension device of the invention can conveniently adjust the installation angle of the lifting lug relative to the automotive body, can adjust the lifting lug at any time according to actual conditions, and eliminates covibration to the greatest extent, thus leading the transmission amount of the vibration of the exhaust system to the automobile body to reach the lowest value, improving comfort of a control cabin, reducing noise pollution and prolonging the service life of the suspension device; and meanwhile, when a vibration test of the exhaust system is performed, multiple different suspension devices need not to be manufactured, thus large scale adjustment of the lifting lug angle is realized, thereby realizing tests of lifting lugs at different installation angles, which has an important significance in improving work efficiency, shortening development cycle and lowering development cost in the development process of automobiles.
Owner:CHONGQING UNIV
An intelligent anti-rolling device for ships
ActiveCN113511309BHigh energy consumptionImprove securityVessel movement reduction by mass displacementElectric machineMachine building
The invention relates to the field of ship machinery manufacturing, and discloses an intelligent anti-rolling device for ships. Through the setting of a drive plate, etc., the counterweight box is pulled into the placement groove on the base to complete the low-height limit and prevent the ship from being static or driving. When there is no need for anti-rolling, the position of the counterweight box is too high to cause greater resistance, thereby increasing energy consumption or affecting the state of the ship. By driving the motor to run further, the vibration frequency of the counterweight box and multiple sub-springs can be quickly changed to eliminate resonance. phenomenon, improve the safety performance of the ship, change the overall quality of the counterweight through electromagnets and other settings, and match the load of the cargo ship to ensure sufficient anti-rolling force of the hull and avoid large swaying phenomena of the hull. Through arc chamfering and other settings, The counterweight is mechanically limited, and there is no need for the electromagnet to keep the energized state for a long time, which saves energy and improves the practicability of the anti-rolling device.
Owner:GUANGDONG OCEAN UNIVERSITY
Clutch disc and clutch
ActiveCN108953414BEliminate resonance phenomenonReduce noise pollutionFriction clutchesCouplingsEngineeringClutch
A clutch driven disc and a clutch, wherein the clutch driven disc includes: a hub arranged coaxially, a driven disc body, the hub includes a hub core, and a hub flange coaxially arranged outside the hub core ; The driven disc body has several first holes distributed circumferentially, the hub flange has several second holes distributed circumferentially, the first holes are axially opposite to the second holes; vibration damping The spring is arranged in the first hole and the second hole and has a pre-tightening force; along the elastic deformation direction, the first end of the first type damping spring is against the side wall of the first hole, and the second end is in contact with the side wall of the first hole. The side wall of the second hole is against, the first end of the second type of damping spring is against the side wall of the second hole, and the second end is against the side wall of the first hole; along the circumferential direction, the driven disc body The force received by the first type of damping spring is equal in size and opposite in direction to the force received by the second type of damping spring. The clutch driven disc of the present invention has no idle stroke, and can eliminate the resonance phenomenon caused by the idle stroke.
Owner:SCHAEFFLER TECH AG & CO KG
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