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30results about How to "Suppression of torsional vibration" patented technology
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Vehicle torsional vibration control method, device and system
InactiveCN106143209AGood torsional vibrationSuppression of torsional vibrationSpeed controllerElectric energy managementElectric vehicleTransmission system
The invention discloses a vehicle torsional vibration control method, device and system. The method comprises the steps of receiving a torque signal emitted by a vehicle controller, detecting the current actual rotating speed of a vehicle and extracting a torsional vibration component of the vehicle, calculating a compensation torque signal with phase opposite to that of the torque signal according to the torsional vibration component, and conducting compensation on the torque signal according to the compensation torque signal. By the adoption of the vehicle torsional vibration control method, device and system, torsional vibration of transmission systems of electric vehicles can be reduced, and vehicle driving smoothness can be improved.
Owner:SAIC MOTOR
Hybrid power unit control system
InactiveCN102007029ASuppression of torsional vibrationReduce torque variationRailway vehiclesToothed gearingsEngineeringTorsional vibration
Disclosed is a means to attenuate torsional vibration in a power unit transmission system generated by torque fluctuations in the engine in an automotive hybrid power unit, and thereby eliminate noise, such as chattering from the power transmission gears and muffled body noise, etc. Disclosed is a hybrid power unit control system for a hybrid power unit that is equipped with a first drive train, which is configured with a gear transmission mechanism linked to a first input shaft that transmits engine drive power via a first friction clutch; a second drive train, which is configured with a gear transmission mechanism linked to a second input shaft that transmits engine drive power via a second friction clutch; a motor generator, which is connected to said first input shaft or second input shaft; and a driven apparatus, which is driven by the drive power transmitted from the output shaft of the gear transmission mechanism of said first drive train or the output shaft of the gear transmission mechanism of said second drive train. Said motor generator is started as an electric power generator when fluctuation in the rotational speed of said engine, which is detected by a rotational speed sensor, exceeds a predetermined upper limit amplitude value, so that torque of opposite phase to said rotational speed fluctuation is applied to said engine with the same periodicity as said rotational speed fluctuation.
Owner:AISIN AI CO LTD +2
Torsional vibration reducing device based on hydraulic damping cam
ActiveCN107165982ASmooth transmissionFast transmissionRotating vibration suppressionInterference fitDrive shaft
The invention discloses a torsional vibration reduction device based on a hydraulic damping cam. The torsional vibration reduction device comprises a flange, a central cam, cam pushing rods, a spline shaft, arc-shaped pushing rods, direction control windows, pressure reduction windows, a ring-shaped oil groove, arc-shaped oil cylinders, a sealing cover and the like, wherein the sealing cover is arranged on one side of the flange; the sealing cover and the flange are connected through screws, and then an enclosed space comprising the pressure reduction windows and the direction control windows is formed; the enclosed space is fully filled with an oil liquid; the spline shaft and the central cam are in interference fit with each other and connected into a whole; the whole of the spline shaft and the central cam is matched and connected with the flange; the spline shaft is connected with a main transmission shaft; the central cam is driven by the main transmission shaft to rotate; through the translation of the cam pushing rods, the arc-shaped pushing rods are driven to rotate in the arc-shaped oil cylinders; the oil liquid is extruded and enters the pressure reduction windows for pressure reduction; the flowing direction of the oil liquid is controlled through the direction control windows; the oil liquid flows in the ring-shaped oil groove on the periphery of the flange; and through further pressure reduction at damping holes, the torsional force is reduced. The torsional vibration reduction device disclosed by the invention has the advantages that the transmission is smooth and steady; the speed is high; the mechanical energy is converted into the hydraulic energy; and the vibration reduction effect is good.
Owner:HANGZHOU DIANZI UNIV
Variable-inertia and variable-damping torsion damper
ActiveCN105782339AReduce output torque fluctuationImprove fuel economyRotating vibration suppressionDamping torqueEngineering
The invention discloses a variable-inertia and variable-damping torsion damper. The variable-inertia and variable-damping torsion damper comprises a variable-inertia assembly and a variable-damping assembly; the variable-inertia assembly comprises a left end disk, a right end cover, an inner iron core, a permanent magnet, an inner coil and variable-mass-distribution ferrofluid; and the inner coil and the permanent magnet are combined to generate a magnetic field to change the distribution and the magnitude of a magnetic field at the position of the ferrofluid, and the magnitude of rotating inertia of the variable-inertia assembly is continuously adjusted. The variable-inertia and variable-damping torsion damper can independently serve as a front end torsion damper of an internal combustion engine and can also serve as a secondary flywheel of a dual-mass flywheel to be connected with a clutch; the transmission system damping and the rotating inertia can be adjusted in a self-adaptive manner according to requirements of a control algorithm; and torsion vibration of a transmission system is effectively inhibited. The variable-inertia and variable-damping torsion damper has the beneficial effects that the structure is compact, output damping torque is large, the rotating inertia adjustment range is wide, and the dynamic response is fast; and the fuel oil economy of the internal combustion engine can be improved easily, and the variable-inertia and variable-damping torsion damper can also be applied in a zero-gravity environment of the aerospace and thus has wide application prospects in rotating type mechanical devices.
Owner:CHONGQING UNIV
Multi-degree-of-freedom cantilever beam type broadband vibration absorber
ActiveCN108506418AWith two-dimensional vibration absorption abilityImprove the effective vibration absorption bandwidthInertia force compensationCounterweightsMulti degree of freedomComputational physics
The invention relates to a multi-degree-of-freedom cantilever beam type broadband vibration absorber. The multi-degree-of-freedom cantilever beam type broadband vibration absorber comprises a mountingbase and a plurality of vibration absorption units, wherein the plurality of vibration absorption units are uniformly arranged on the outer periphery of the mounting base; and the base is connected to an absorbed vibration device, the inherent frequency of each vibration absorption unit is fi, the vibration frequency of the absorbed vibration device is f0, wherein f0-2Hz is smaller than or equalto fi, and fi is smaller than or equal to f0+2Hz. According to the multi-degree-of-freedom cantilever beam type broadband vibration absorber, the vibration absorption units with multiple frequencies are processed into an annular whole through the vibration absorber, the effective vibration absorption bandwidth is obviously improved, meanwhile, due to the fact that the mounting base is shared, theproportion of invalid quality is reduced; at the same time, the vibration absorption units are arranged in a circumferential direction, the two-dimensional vibration absorption capacity in the plane is achieved, and torsional vibration can be effectively inhibited; and the relation between the inherent frequency of the vibration absorption units and the vibration frequency of the absorbed vibration device is set, the vibration absorption bandwidth can be expanded while the vibration absorption efficiency is guaranteed, so that the requirements of more vibration absorption directions can be met.
Owner:BEIJING INST OF RADIO MEASUREMENT
Driving force controller for electric vehicle
ActiveCN106414157ASuppression of torsional vibrationPrevent deviationSpeed controllerElectric devicesMotor speedMotor drive
Provided is a driving force controller for an electric vehicle, said controller having a simple configuration, being able to suppress torsional vibrations in a drive system, and being able to suppress the divergence between a target driving force and a real driving force during running-resistance generation and braking. The driving force controller controls the motor driving force in the drive system of an electric vehicle and is provided with: a target driving-force setting means (11) that sets a target driving-force on the basis of a driver request; a division means (12) that calculates a first motor-torque command value by dividing the target driving-force by a reduction ratio; a target acceleration calculation means (15) that calculates a target acceleration by dividing the target driving-force by the drive system inertia; a real acceleration calculation means (14) that calculates the real acceleration by differentiating the real motor speed; a correction amount calculation means (20) that calculates a correction amount that reduces the deviation between the target acceleration and the real acceleration; and a command value calculation means (18) that calculates a second motor-torque command value by adding the correction amount to the first motor-torque command value.
Owner:CALSONIC KANSEI CORP
Torsion vibration absorber with piecewise linear rods
InactiveCN108547914ASimple structureReduce volumeRotating vibration suppressionNoise controlCircular disc
The invention relates to the technical field of vibration noise control, in particular to a torsion vibration absorber with piecewise linear rods. According to the technical scheme, the torsion vibration absorber comprises a supporting disc, a bearing, a shaft sleeve, a fastening screw, a connection rod, the piecewise linear rods and a vibration absorbing mass block. The supporting disc is of a disc structure, the supporting disc is fixedly connected to a rotor, the vibration absorbing mass block is of a disc structure, the vibration absorbing mass block is provided with a center hole and fourcircular arc grooves distributed evenly in the circumference with different slot widths and different circular arc angles, the supporting disc is fixedly connected with the vibration absorbing mass block through the connection rod, the piecewise linear rods are four rigid rods with different diameters, one end of each piecewise linear rod is fixedly connected with the supporting disc, and the other ends of the piecewise linear rods are placed into the four circular arc grooves correspondingly and keep gaps away from the angular displacement direction of the circular arc grooves. The torsion vibration absorber with the piecewise linear rods is simple in structure, wide in vibration suppression frequency band and remarkable in effect.
Owner:NORTHEASTERN UNIV LIAONING
Torsional vibration reducing device
InactiveCN105697649AReduce processing costsPrevent disengagementRotating vibration suppressionTorsional vibrationMechanical engineering
A torsional vibration reducing device is provided. The torsional vibration reducing device includes a rotating body, a plurality of rolling bodies, and a connection member. The connection member connects the plurality of rolling bodies, and at least two contact portions are positioned on an inner surface of each of the plurality of accommodating portions, a portion of an outer peripheral surface of each of the plurality of rolling bodies being positioned in each of the plurality of accommodating portions, and the outer peripheral surface of each of the plurality of rolling bodies being configured to come into point contact with the contact portions in the circumferential direction of the rotating body.
Owner:TOYOTA JIDOSHA KK
Damper device
InactiveCN104047992AIncreased torsional vibrationImproved damping characteristics of torsional vibrationToothed gearingsEngine controllersTorsional vibrationClutch
Owner:SUBARU CORP
Method for damping torsional vibrations in power generation plant
InactiveCN104040875ASuppression of torsional vibrationTwist Angle HoldWind motor controlMachines/enginesLoad torqueClassical mechanics
The invention relates to a method for damping torsional vibrations in a power generation plant (100). The power generation plant (100) is equipped with a drive train (2-5), a rotor (1), which is fitted at a rotor-side end (1') of the drive train (2-5), and a generator (6), which is driven via the drive train (2-5) and is fitted at a generator-side end (6') of the drive train (2-5), wherein an angular difference between a first point (1') and a second point (6') on the drive train (2-5) is determined over time and, on the basis of the time profile of the determined angular difference, torsional vibrations in the drive train (2-5) are damped by correspondingly presetting a load torque (MG) of the generator and a drive torque (MA) of the rotor (1).
Owner:ZF FRIEDRICHSHAFEN AG
Flexible antenna system fluid shock absorbing and attitude regulating technology
InactiveCN101060190AAchieving a large angle of inclinationSuppression of torsional vibrationRotating vibration suppressionAntenna supports/mountingsHydraulic cylinderRing device
The related technical improvement for flexible cable traction system by oil ring device refers to the fluid vibration damping and attitude regulation for flexible antenna system. In prior art, the position and attitude control for antenna can only realized in small-scale, and lies in the means of hydraulic cylinder, gear box and rotary joint. All those rigid structure are too bulk to move in large scale. In this invention, around the feeding device 1, using joint bar 8 to connect with oil ring 2, and filling oil 2 in the ring 2. The inclined angle in this invention can come up to 60deg. It can also inhibit the torsional vibration of feeding device efficiently.
Owner:XIDIAN UNIV
Shock absorbing device and engine system
ActiveCN110230660ASimple structureEasy to installSpringsSprings/dampers design characteristicsDrive shaftEngineering
The invention discloses a shock absorbing device and an engine system and belongs to the technical field of shock absorption. The shock absorbing device comprises a shell and a transmission shaft. Theshell is connected to a rotating driving part and a plurality of inner convex teeth are circumferentially arranged on the inner wall of the shell; the transmission shaft is arranged on the shell in apenetrating manner, a plurality of outer convex teeth are circumferentially arranged on the outer wall of the transmission shaft, the outer convex teeth and the inner convex teeth are distributed alternately, and rubber shock absorbing blocks are arranged between the adjacent outer convex teeth and inner convex teeth. When a flywheel drives the shell to rotate, the inner convex teeth on the shellpull the transmission shaft to rotate through the rubber shock absorbing blocks, the transmission shaft then drives a follow-up transmission system to rotate, and elastic damping of the rubber shockabsorbing blocks can convert rigid impact to elastic impact so as to achieve shock absorption. The rigidity of the rubber shock absorbing blocks is easily controlled, the rigidity of the rubber shockabsorbing blocks is smaller, and the vibration energy can be consumed in form of heat energy more effectively, so that torsional vibration is inhibited, the inherent frequency of the integral device is avoided to the maximum extent, and the shock absorbing effect is good.
Owner:SHANTUI CONSTR MASCH CO LTD
Resonator Element, Electronic Device, Electronic Apparatus, And Moving Object
InactiveCN104734660AHigh Q valueSuppression of torsional vibrationImpedence networksEngineeringTorsional vibration
A resonator element inhibiting an unwanted vibration such as a torsional vibration from occurring and having a high Q-value, an electronic device, an electronic apparatus, and a moving object each equipped with the resonator element are provided. The resonator element is provided with a base section, a vibrating arm extending from the base section, and a groove section having a groove with a bottom formed from a first principal surface of the vibrating arm toward a second principal surface on an opposite side to the first principal surface, and is further provided with a mass section disposed on at least a part of the second principal surface.
Owner:SEIKO EPSON CORP
Induction motor control device and induction motor control method
ActiveCN104885356ASuppression of torsional vibrationAC motor controlVector control systemsDrive wheelNatural resonance
This induction motor control device, which sets a motor torque command value on the basis of vehicle information and controls an induction motor connected to the drive wheels, calculates a first torque current command value and a first excitation current command value on the basis of the motor torque command value and estimates the rotor flux on the basis of the first excitation current command value. This device further calculates a first torque command value on the basis of the estimated rotor flux value and the first torque current command value, and calculates a second torque command value by performing filter processing on the first torque command value to remove the natural resonance frequency component of the drive shaft torque transmission system of the vehicle. This device then calculates a second torque current command value on the basis of the second torque command value and the estimated rotor flux value, and controls the driving of the motor on the basis of the first excitation current command value and the second torque current command value.
Owner:NISSAN MOTOR CO LTD
A vibration isolation platform without angular displacement
ActiveCN110296179BImproved stiffness propertiesSuppression of torsional vibrationNon-rotating vibration suppressionMetal rubberEngineering
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Belt wheel vibration absorber
InactiveCN107642593AShorten the lengthExpand the scope of supportingPortable liftingGear lubrication/coolingResonanceEngineering
A belt wheel vibration absorber is provided with an inner supporting plate which can be connected to a diesel engine crankshaft, the periphery of the inner supporting plate is sleeved with a belt wheel, and a rubber body is annularly arranged between the inner supporting plate and the belt wheel. The whole length of a diesel engine can be effectively shortened, the matching range of diesel engineproducts is widened, the belt wheel vibration absorber is convenient to install and use, the part number is decreased, the cost is reduced, the torsional vibration demand of the engine crankshaft canbe met, accordingly the maximum stress of the crankshaft is reduced, the torsion amplitude of a whole crankshaft system is decreased, resonance occurred at common rotary speed of an engine is avoided,and the whole engine noise is effectively reduced. In addition, the resonance has a front-end driving power output function of the crankshaft and is compact in structure.
Owner:李一波
Multiple clutch with encoder part for rotational speed detection; and clutch arrangement with multiple clutch and dual-mass flywheel
ActiveCN111630291ALow installation space requirementClever closed formFriction clutchesInterengaging clutchesDrivetrainFlywheel
The invention relates to a multiple clutch (1) for a drivetrain of a motor vehicle, having a first clutch (2) and a second clutch (3), wherein each clutch (2, 3) has a first clutch component (4a, 4b)and a second clutch component (5a, 5b) which is selectively rotationally connectable to the first clutch component (4a, 4b), and having an encoder part (8) which has a rotational speed and / or rotational position detection geometry (6) and which is operatively connected to a sensor (7), wherein the encoder part (8) is used as a connecting element (8) which rotationally conjointly connects the firstclutch component (4a) of the first clutch (2) to the first clutch component (4b) of the second clutch (3). The invention also relates to a clutch arrangement (21) having a multiple clutch (1) and having a dual-mass flywheel (22).
Owner:SCHAEFFLER TECH AG & CO KG
Shock absorber and engine system
ActiveCN110230660BSimple structureEasy to installSpringsSprings/dampers design characteristicsDrive shaftEngineering
The invention discloses a damping device and an engine system, belonging to the technical field of damping. The shock absorbing device of the present invention includes a casing and a transmission shaft, the casing is used to connect with the rotating drive and the inner wall of the casing is provided with a plurality of internal convex teeth along the circumference; the transmission shaft is passed through the casing, and the outer wall of the transmission shaft is A plurality of outer convex teeth are arranged in the direction, and the outer convex teeth and the inner convex teeth are alternately distributed, and rubber shock absorbers are arranged between the adjacent outer convex teeth and the inner convex teeth. When the flywheel drives the casing to rotate, the inner convex teeth on the casing turn the drive shaft through the rubber shock absorber, and the drive shaft drives the subsequent transmission system to rotate. The elastic damping of the rubber shock absorber can change the rigid impact into elastic impact, Realize shock absorption; and the stiffness of the rubber shock absorber is easy to control, and the stiffness of the rubber shock absorber is smaller, which can more effectively consume the vibration energy in the form of heat energy, thereby suppressing torsional vibration and avoiding the vibration of the whole machine to the greatest extent. Natural frequency, good shock absorption effect.
Owner:SHANTUI CONSTR MASCH CO LTD
Control system and method for restraining torsional vibration of vehicle through single mass flywheel
ActiveCN113483056AEliminate torque ripple componentsSuppression of torsional vibrationHybrid vehiclesRotating vibration suppressionAdaptive filterControl system
The invention provides a control system and method for torsional vibration of a hybrid drive vehicle through a single mass flywheel, and relates to the torque control technology of an automobile transmission system. A P2 coaxial driving module is mounted between an engine and a transmission; the system comprises a motor and the single mass flywheel; an adaptive filter output signal is calculated by using an adaptive filter tap weight coefficient vector, the adaptive filter output signal is taken as a motor compensation torque, the motor compensation torque and a motor expected torque are taken as a motor instruction torque; and the output torque of the single mass flywheel and the output torque of the motor serve as the input torque of an input shaft of the transmission together. The motor compensation torque in the transmission input torque is used for eliminating the single mass flywheel output torque alternating component, and then the vibration level of the transmission system is weakened.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
Design method of composite vibration damper and composite vibration damper
ActiveCN113738801ASuppress radial vibrationSuppression of torsional vibrationGeometric CADVibration dampersControl theoryRadial vibration
The invention discloses a design method of a composite vibration damper and the composite vibration damper. The design method comprises the following steps of a, debugging torsional vibration parameters of the composite vibration damper according to the torsional resonance frequency of a transmission system when the transmission system has NVH complaint, and obtaining a torsional vibration parameter range; b, debugging radial vibration parameters of the composite vibration damper according to the radial resonance frequency of the transmission system when the transmission system has NVH complaint, and obtaining a radial vibration parameter range; c, according to the torsional vibration parameter range and the radial vibration parameter range, obtaining verification parameters of the composite vibration damper when both the torsional vibration and the radial vibration meet the shock absorption requirements, and according to the verification parameters, obtaining composite vibration reduction conditions; and d, according to the verification parameters, obtaining the composite vibration reduction conditions, and according to the composite vibration reduction conditions, trial-manufacturing a sample piece for loading verification. All parameters of the torsion vibration damper are adjusted to reach the expected range, and the purpose that one composite vibration damper is used for restraining radial vibration and torsion vibration at the same time is achieved, so that a radial vibration damper is omitted, and cost is saved.
Owner:SAIC MOTOR
Torsional Vibration Damping Device Based on Hydraulic Damping Cam
ActiveCN107165982BSmooth transmissionFast transmissionRotating vibration suppressionInterference fitDrive shaft
The invention discloses a torsional vibration reduction device based on a hydraulic damping cam. The torsional vibration reduction device comprises a flange, a central cam, cam pushing rods, a spline shaft, arc-shaped pushing rods, direction control windows, pressure reduction windows, a ring-shaped oil groove, arc-shaped oil cylinders, a sealing cover and the like, wherein the sealing cover is arranged on one side of the flange; the sealing cover and the flange are connected through screws, and then an enclosed space comprising the pressure reduction windows and the direction control windows is formed; the enclosed space is fully filled with an oil liquid; the spline shaft and the central cam are in interference fit with each other and connected into a whole; the whole of the spline shaft and the central cam is matched and connected with the flange; the spline shaft is connected with a main transmission shaft; the central cam is driven by the main transmission shaft to rotate; through the translation of the cam pushing rods, the arc-shaped pushing rods are driven to rotate in the arc-shaped oil cylinders; the oil liquid is extruded and enters the pressure reduction windows for pressure reduction; the flowing direction of the oil liquid is controlled through the direction control windows; the oil liquid flows in the ring-shaped oil groove on the periphery of the flange; and through further pressure reduction at damping holes, the torsional force is reduced. The torsional vibration reduction device disclosed by the invention has the advantages that the transmission is smooth and steady; the speed is high; the mechanical energy is converted into the hydraulic energy; and the vibration reduction effect is good.
Owner:HANGZHOU DIANZI UNIV
Fan blade device for brushless fan
ActiveCN112228369BSuppression of torsional vibrationGuaranteed dynamic unbalancePump componentsPump installationsBrushless motorsEngineering
The invention relates to the field of brushless fans, in particular to a fan blade device for a brushless fan, which includes a fan blade assembly arranged on the shaft of a brushless motor. There is a buffer mechanism for suppressing the torsional vibration of the drum between the casing of the brushless motor and the casing of the brushless motor. There are a number of paddles fixed on the inner peripheral wall of the drum. The buffer mechanism passes through the air pipe to the storage Air is conveyed inside the air cylinder to increase the internal pressure of the air storage cylinder. The air storage cylinder can generate aerodynamic thrust on the paddle to make the paddle drive the rotor to rotate. The fan blade assembly also includes a ring cylinder. A plurality of vanes are arranged between the outer wall of the cylinder and the inner wall of the annular cylinder. The fan blade device used for the brushless fan improves and guarantees high-efficiency air delivery efficiency, improves the service life of the rotating shaft of the brushless motor, and reduces energy consumption.
Owner:湖南伟力汽车零部件有限公司
A torsional vibration absorber unit and absorber based on bistable origami
ActiveCN113669414BSimple structureMeet working conditionsInertia force compensationTriacontagonEngineering
The invention discloses a torsional vibration absorber unit and the absorber based on bistable origami. The vibration absorber is composed of a plurality of torsional vibration vibration absorber units arranged periodically, and the vibration absorber unit includes a Kresling vibrator and two asymmetrically arranged mass blocks, and the mass blocks are asymmetrically arranged on the top surface of the Kresling vibrator; The upper and lower bases of the Kresling oscillator are regular n polygons, where n is an even number, and the height of the Kresling oscillator is greater than the radius of the circumscribed circle of the regular n polygon, and the Kresling oscillator has a bistable state. The structure of the present invention is simple, and can switch between two stable states according to the actual situation, thereby adjusting the vibration frequency to be suppressed. Moreover, due to the asymmetric arrangement of the structure of the present invention, the vibrator is sensitive to torsional vibration, which can produce obvious Torsional vibration suppression effect.
Owner:ZHEJIANG UNIV
Variable inertia variable damping torsional shock absorber
ActiveCN105782339BRealize DC signalReduce output torque fluctuationRotating vibration suppressionDamping torqueFuel oil
The invention discloses a variable-inertia and variable-damping torsion damper. The variable-inertia and variable-damping torsion damper comprises a variable-inertia assembly and a variable-damping assembly; the variable-inertia assembly comprises a left end disk, a right end cover, an inner iron core, a permanent magnet, an inner coil and variable-mass-distribution ferrofluid; and the inner coil and the permanent magnet are combined to generate a magnetic field to change the distribution and the magnitude of a magnetic field at the position of the ferrofluid, and the magnitude of rotating inertia of the variable-inertia assembly is continuously adjusted. The variable-inertia and variable-damping torsion damper can independently serve as a front end torsion damper of an internal combustion engine and can also serve as a secondary flywheel of a dual-mass flywheel to be connected with a clutch; the transmission system damping and the rotating inertia can be adjusted in a self-adaptive manner according to requirements of a control algorithm; and torsion vibration of a transmission system is effectively inhibited. The variable-inertia and variable-damping torsion damper has the beneficial effects that the structure is compact, output damping torque is large, the rotating inertia adjustment range is wide, and the dynamic response is fast; and the fuel oil economy of the internal combustion engine can be improved easily, and the variable-inertia and variable-damping torsion damper can also be applied in a zero-gravity environment of the aerospace and thus has wide application prospects in rotating type mechanical devices.
Owner:CHONGQING UNIV
A multi-degree-of-freedom cantilever beam broadband vibration absorber
ActiveCN108506418BWith two-dimensional vibration absorption abilityImprove the effective vibration absorption bandwidthInertia force compensationCounterweightsCantilevered beamEngineering
Owner:BEIJING INST OF RADIO MEASUREMENT
Duplex clutches and clutch devices
ActiveCN111630291BLow installation space requirementClever closed formFriction clutchesInterengaging clutchesDrivetrainFlywheel
The invention relates to a multiple clutch (1) for a powertrain of a motor vehicle, the multiple clutch having a first clutch (2) and a second clutch (3), wherein each clutch (2, 3) has a first clutch (2, 3) A clutch member (4a, 4b) and a second clutch member (5a, 5b) selectively rotatably connected to the first clutch member (4a, 4b), and the multiple clutch has an encoder portion (8) ), the encoder portion has a rotational speed and / or rotational position detection geometry (6) and is operatively connected to a sensor (7), wherein the encoder portion (8) serves to connect the first clutch ( 2) said first clutch part (4a) is rotatably connected to the connecting element (8) of said first clutch part (4b) of said second clutch (3). The invention also relates to a clutch device (21) with a double clutch (1) and a dual mass flywheel (22).
Owner:SCHAEFFLER TECH AG & CO KG
Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system
InactiveCN100441328CEasy to implementSimple structureMetal rolling arrangementsRoll speed control deviceMotor speedTorsional oscillations
The invention discloses a control system of dynamic deceleration and torsional to inhibit the driving system of rolling mill in the rolling mill driving control domain, which comprises the following parts: two-quality elastic driving system of rolling mill, control system and power variable-flow system, wherein two-quality elastic driving system of rolling mill contains rolling mill and roller to connect by connection axle; the control system contains load observer, state feedback gain amplifier and motor speed-adjusting system; the power variable-flow system is electric power electronic transformer, which transforms the electrical network voltage and current into fitful motor voltage and current to drive the motor speed-adjusting operation according to the control pressure.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND +1
Method for reducing vibration and noise of permanent-magnet motor
ActiveCN102025304BAchieve vibration reductionEasy to chooseTorque ripple controlElectric machineMagnetic poles
The invention discloses a method for reducing the vibration and the noise of a permanent-magnet motor, comprising the following steps of: (1) initially selecting a magnetic pole number and a tooth socket number according to application occasions; (2) judging the stress and vibration states of the permanent-magnet motor, wherein the permanent-magnet motor generates torque pulsation if a phase tuning factor ks=0 is solved according to a formula: ks=mod (lsNs / Nm) and km=0 is solved according to a formula: km=mod (lsNm / Ns), the permanent-magnet motor generates unbalanced magnetic pull if the phase tuning factor ks=1 or Nm-1 and km=1 or Ns-1, and the permanent-magnet motor is in a stress balance state if ks=2, 3, 4 to Nm-2 and km=2, 3, 4 to Ns-2; and (3) repeating calculation formulas of the corresponding stress and vibration states in the step (2) to select the sum of the magnetic pole number and the tooth socket number. The method can be used for selecting different parameters aiming at different occasions according to the mapping relation between the magnetic pole number and the tooth socket number of the permanent-magnet motor and the vibration and noise characteristics of the permanent-magnet motor, thereby realizing the vibration reduction and / or the noise reduction of the permanent-magnet motor.
Owner:TIANJIN UNIV
Torsional Percussion Drilling Speed Up Tool
ActiveCN108625769BSimple structureExtended service lifeReciprocating drilling machinesConstructionsDrive shaftImpact structure
The invention is a torsional impact drilling acceleration tool. The torsional impact drilling acceleration tool includes a shell body, the shell body is internally provided with a shell center hole, adrill bit seat is arranged at the other end of the shell boy, the drill bit seat is internally provided with a drill bit seat center hole, and a drill bit can be sleeved with the end, away from the shell body, of the drill bit seat center hole in a sealing mode. A driving shaft is coaxially sleeved with the shell center hole, the driving shaft is internally provided with a driving shaft center hole which is formed in the axial direction in a penetrating mode, and one end of the driving shaft is arranged in the drill bit seat center hole in a penetrating mode. A circumferential impact structure is arranged on the outer wall of one end of the driving shaft in a sleeving mode, the circumferential impact structure can produce circumferential reciprocating impact and is fixed in the axial direction, the circumferential impact structure is internally provided with a circumferential impact structure center hole which is formed in the axial direction in a penetrating mode, and the circumferential impact structure center hole and the driving shaft center hole can be formed in a communicating mode. The torsional impact drilling acceleration tool is simple in structure and long in service life, the cutting state of the drill bit can be improved, the service life of the drill bit is prolonged, and the efficiency of breaking rock by the drill bit is improved.
Owner:BEIJING UNIV OF TECH +1
Mass displacement bridge torsional vibration damper
ActiveCN106245515BSuppression of torsional vibrationImprove securityBridge structural detailsEngineeringVibration absorption
The invention discloses a mass shifting type bridge torsional vibration absorber. The mass shifting type bridge torsional vibration absorber mainly comprises a main guide rail horizontally mounted on a bridge base plate, wherein a left guide rail and a right guide rail are symmetrically and movably overlapped at two ends of the main guide rail; the outer side ends of the left guide rail and the right guide rail are fixedly connected with a left baffle and a right baffle respectively; the left guide rail and the left baffle as well as the right guide rail and the right baffle are connected to form right-angle L shapes; the middle bottoms of the left guide rail and the right guide rail are respectively hinged to the bridge base plate through a left hinge support and a right hinge support; a left spring and a right spring are respectively arranged between the bottoms of the outer side ends of the left guide rail and the right guide rail and the bridge base plate; a left vertical column and a right vertical column are further respectively arranged on the bridge base plate at the outer side ends of the left spring and the right spring; grooves with the same shapes are formed in the upper surfaces of the main guide rail, the left guide rail and the right guide rail; a gravity ball is arranged in each groove. With the reduction of the vibration frequency of a bridge, the mass shifting type bridge torsional vibration absorber can supply larger torque to the bridge, so that the vibration absorption effect is better.
Owner:HUNAN UNIV OF SCI & TECH
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