CN105443857A - Variable-damping vibration attenuation and noise reduction device for valve - Google Patents
Variable-damping vibration attenuation and noise reduction device for valve Download PDFInfo
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- CN105443857A CN105443857A CN201510921403.4A CN201510921403A CN105443857A CN 105443857 A CN105443857 A CN 105443857A CN 201510921403 A CN201510921403 A CN 201510921403A CN 105443857 A CN105443857 A CN 105443857A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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Abstract
The invention discloses a variable-damping vibration attenuation and noise reduction device for a valve and belongs to the field of vibration control. The combined variable-damping vibration attenuation and noise reduction device comprises a vibration transmission clamp, a magnetorheological fluid damper and a vibration collection analysis and control system. According to the device, the vibration transmission clamp mounted on a valve rod is used for transmitting vibration to the magnetorheological fluid damper to drive a movable shearing sheet to do shearing motion in magnetorheological fluid and to produce the damping force to offset the vibration energy of the valve; the vibration collection analysis and control system is used for monitoring the change of vibration parameters of the valve in real time, and adjusting the magnitude of the damping force of the damper according to the vibration parameters and in combination with the size and type of the valve and the structural parameters of the damper, so the active closed-loop control of the valve system vibration is realized. The combined variable-damping vibration attenuation and noise reduction device has the advantages that the vibration of different valves by different reasons can be effectively reduced, and the vibration and noise control of the valve under variable working conditions and opening degrees is realized.
Description
Technical field
The present invention is a kind of mutative damp vibration and noise reducing device applying to valve, is mainly used in the vibration & noise of the various valves in control valve wire system, comprises ball valve, gate valve, butterfly valve, stop valve and control valve etc., belong to vibration control technology field.
Technical background
In recent years, along with developing rapidly of the industries such as petrochemical industry, metallurgy, electric power, boats and ships, Aero-Space, maximization and integration have become the trend of its development, make the safety and stability of pressure pipeline system more and more become the emphasis of people's concern.The medium of conveying often has the larger danger such as inflammable, explosive, poisonous, high temperature, high pressure in pressure pipeline system, once careless slightly, pressure piping just may be caused to leak, explode, burn, the major accident such as poisoning, environmental pollution.Valve (Valve), being the mechanical device of the flow of control flow check body medium, the flow direction, pressure, temperature etc., is the basic element of character in pipe-line system.When valve is subject to external interference (entrance, outlet pressure suddenly change, line temperature, changes in flow rate, even gas-liquid two-phase flow), valve vibration will be caused, produce violent noise, even destructive valve door, the safe and stable operation of serious harm e-quipment and pipe system.Therefore, must take effective measures control valve vibration & noise.
The vibration noise of valve is mainly derived from two aspects: fluid conveying machine (compressor, pump etc.) produces vibration and causes valve vibration by connecting pipe transmission and produce noise; The vibration & noise of fluid by bringing out during valve.Wherein flow noise can be divided into again: 1. the change of valve body internal pressure makes it with some parts of fluid impact valve or the pipe arrangement that is connected with it produces and vibrates, and even resonates and with noise, is mechanical vibrations noise; 2. fluid is by throttling during valve, and produce annular jet along spool and be separated with wall, its separated boundary layer is very unstable, produces whirlpool, causes chamber internal resonance and produces noise, be vortex noise; 3. fluid is by mixing with hypervelocity and downstream low velocity fluid turbulization after valve, fluid stable state is damaged huge disturbance occurs, produce powerful jet noise, after even fluid passes through valve throttle, its downstream pressure is lower than fluid vapor pressure, make the hurried gasification of turbulent flow body and form air pocket, air pocket produces judder noise, i.e. hydrodynamic in formation with during explosion.Research shows, the frequency that valve pressure fluctuation intensity is larger presents continuous broadband properties, and corresponding happening part concentrates near valve seat reducing throat, valve seat upper surface and spool lower surface.Under valve opening and closing process and changes in flow rate condition, the active force of fluid is instantaneous hydraulic dynamics, and flow field when normally working compared with valve is more complicated, more unstable, is easy to the vibration aggravating valve, thus produces larger noise.Therefore, be necessary to adopt suitable technological means to reduce the vibration and noise of valve, particularly when variable-flow, pressure changeable and valve opening and closing operating mode.
At present, the method reducing valve vibration and noise mainly contains two kinds: originate vibration and noise reducing and propagation vibration and noise reducing.Noise reduction of originating can be realized by change valve body or valve pocket structure, increase orifice plate or foraminous net cover, multi-step pressure reduction etc.Smith and Luloff proposes amendment valve seat size (such as chamfering) at document " Theeffectofseatgeometryongatevalvenoise " also has certain effect (JournalofPressureVesselTechnology-TransactionsoftheASME to reduction vibration noise, 2000,122 (4): 401-407).Ueno etc. adopt the technique study of test and numerical value cavitation to cause valve noise at " Noisemeasurementandnumericalsimulationofoilflowinpressur econtrolvalves ", in simulation model, flowing is reduced to the laminar flow of unsteady state incompressible fluid, result shows to increase valve pocket volume, good inhibitory action (JSMEInternationalJournalSeriesB-FluidsandThermalEngineer ing is had to suppressing the cavitation effect formed owing to stablizing large-scale circular flow, 1994,37 (2): 336-341).Multistage aperture drop architecture is have employed in Gao Yiqiu, Zhou Zhendong and Xi Jun " improvement of throttle type steam regulation valve and performance calculate ", show that the structure after improving significantly reduces steam flow speed by numerical calculation, improve the erosion effect of steam flow, reduce jet noise, improve the safety reliability (steam turbine technology 2012 the 54th volume the 4th phase 261st ~ 263 pages) of steam regulation valve.Silencing apparatus applies to releasing system, can stop sound wave propagation, is the effective tool propagating vibration and noise reducing.Such as Extonsion Group, micropunch plate muffler, orifice plate etc. are widely used in pipeline and valve export place, excellent noise reduction effect.Wang Wenqi, He Youjing describe the structure of Beijing No.2 Heat & Power Plant's high-pressure autoclave safety valve silencing apparatus in " improvement of boiler safety valve exhaust sound ", and this silencing apparatus spreads cover by two-layer aperture and certain sound absorption structure is formed.When safety valve machinery action; the noise elimination numerical value of silencing apparatus is 34dB (A); total loudness reduces about 85%; on the ground apart from safety valve silencing apparatus row mouth 70m place; exhaust sound when can't hear safety valve action, effect of vibration and noise reduction clearly (environmental protection 1979 the 5th phase 28 ~ 29 pages).
The reason that valve produces vibration and noise is a lot, existing vibration and noise reducing means often can only be effective for certain vibration noise, only convection cell cavitation vibration and noise is effective such as to optimize valve seat, valve pocket structure, and the jet noise in convection cell mechanical vibration or valve downstream is invalid; Multi-step pressure reduction can reduce valve fluid velocity inside, reduces the whirlpool in valve pocket, improves coupled vibrations and the noise of fluid and valve body, but its complex structure, multi-step pressure reduction mechanism is still indefinite, and design difficulty is large, and cannot improve fluid machinery vibration and noise; Acoustic wave filter structure is complicated, volume is large, weight is large, is easy to occur that maintenance is frequent, soundproof effect is poor, the problems such as life cycle is short.
Add external damping to vibration system and carry out dissipation movement energy, reduce the dynamic response of structure, reduce noise, be a kind of highly effective means in engineering application, be widely used in Aero-Space, petroleum and petrochemical industry, build a bridge, the field such as shipping vehicle.Common damping device mainly contains: frcition damper, viscous damper, viscoelastic damper, magnetic current (electric current) mutative damp device and squeeze film damper (SFD) etc.
Slippage or distortion is produced under the pre-constant load of frcition damper before primary structural member surrender, rely on friction or Damping work vibrational energy, meanwhile, because natural vibration period after malformation lengthens, reduce vibration input, thus reach the object reducing structural vibration response.Frcition damper simple structure, draws materials easily, cheap, is usually used in the shock resistance improving engineering structure.Squeeze film damper (SFD) damper mainly applies to rotating machinery, the vibration of high speed rotor can be effectively reduced, especially greatly reduce amplitude during critical speed of rotation, and reduced the critical speed of rotation of rotor, be widely used in Aeronautics and Astronautics and nuclear industry.The basic principle of viscous damper is that viscous fluids flows in damper mechanism, interacts with damper structure, makes fluid dynamic energy be converted into heat energy and consumes energy.The kinetic energy of viscous fluids is undertaken to thermal energy by friction energy-dissipating and hole contracting effect two aspects that consume energy.Viscous damper is applied in munitions industry the earliest mid-term in 19th century, is used for the rebounding force overcome when firing shells, and is widely used in vehicle, space flight and military project system subsequently, also has in recent years and use widely in building bridge, petrochemical pipe.Magnetic rheological liquid damper is a kind of novel intelligent damping device, and it mainly produces according to the change of input voltage (electric current) and levels off to the damping force of optimum active controlling force, carries out passive energy dissipation to system.Magnetic rheological liquid damper utilizes magnetic rheology effect, and namely magnetic flow liquid presents the Newtonian fluid characteristic of low-viscosity under without the condition in magnetic field, produces little damping force, and under the effect of high magnetic fields, presents the fluid characteristics of high viscosity lazy flow, produce large damping force.Due to the advantage such as its power consumption is low, damping force is large and structural response is fast, be successfully applied to the structural vibration control in the fields such as vehicle, building, bridge, also day by day received publicity in rotating machinery vibrating field.Ma Xinna, Yang Shaopu, Di Shuling establishes 17 degrees of freedom express locomotives laterally half Active model based on magnetic rheological liquid damper in " the horizontal semi-active vibration control research of express locomotive based on magnetic rheological liquid damper ", control effects of giving chapter and verse revises the self-adjusted fuzzy control strategy of magnetic rheological liquid damper input parameter in real time, effective attenuation locomotive transverse vibration; In low frequency phase, especially the stationarity that can significantly improve express locomotive within the scope of large 5Hz ~ 8Hz and riding comfort (vibration and impact 2009 the 28th volume the 7th phase 126th ~ 130 pages) are affected on ride quality.Wang Xiuyong, Chen Zheng waits clearly and carried out comprehensive simulation simulation to the damping characteristic of magnetic rheological liquid damper-cable systems in " magnetic rheological liquid damper controls research to Inclined Cable Vibration ", and the experimental study of inhaul cable vibration opened loop control is carried out at Dongting Lake Bridge application magnetic rheological liquid damper, result shows that this damper effectively inhibits wind-rain induced vibration phenomenon, and test and simulation result have good conformity (engineering mechanics 2002 the 19th volume the 6th phase 22nd ~ 28 pages).Keun-JooKim also shows that in " OptimalpositioningandcontrolofaMR-squeezefilmdamperforre ducingunbalancedvibrationsinarotorsystemwithmultiplemass es " unbalance response of rotor-support-foundation system under critical speed of rotation is due to the damping function of magnetic rheological liquid damper obviously weak (JournalofVibrationandAcoustics2009 the 131st volume the 4th phase 0410061-0410069).
Based on the plurality of advantages of damping vibration attenuation technology in structural vibration reduction field, in conjunction with the feature of valve vibration and noise, devise a kind of mutative damp vibration and noise reducing device based on magnetic rheological liquid damper, this device can suppress the vibration and noise of many reasons lower valve, realize the ACTIVE CONTROL of the vibration and noise of valve under variable working condition, change aperture, reach valve vibration and noise reducing object.
Summary of the invention
The present invention devises a kind of mutative damp vibration and noise reducing device be installed on valve rod, for the vibration characteristics of machinery and the continuous wideband of fluid matasomatism lower valve in pipeline valve system, the ACTIVE CONTROL of valve vibration and noise is realized by designed mutative damp vibration and noise reducing device, particularly valve is controlled at variable working condition, the vibration and noise become under aperture, reach the object of valve vibration and noise reducing.The mutative damp device that proposed adopts closed loop ACTIVE CONTROL, can to provide timely, enough large damping force according to the vibrational energy of system, consumption systems vibrational energy.Vibration when this device normally runs valve and all effective in variable working condition, the varying load become under aperture, and to being swift in response that all degrees of freedom are vibrated.It is simple that this device also has structure, and be easy to handling and install, space, mounting point is flexible, and the advantages such as stable performance, practicability are good, strong adaptability, long service life.
For realizing above object, the present invention takes following technological scheme:
This mutative damp vibration and noise reducing device involving vibrations transmission folder, magnetic rheological liquid damper, vibration acquisition analysis & control system.The function of vibration passing folder is that vibration is delivered to damper from valve rod, and because valve rod has spin shape sports type and optical axis valve rod of threaded valve rod to make two kinds, straight reciprocating motion type, therefore vibration passing accompanies two types.The first is contained on threaded valve rod, comprises threaded sleeve, rolling bearing, optical axis cover and linear bearing.Wherein threaded sleeve coordinates with threaded stem, and rolling bearing is arranged on threaded sleeve, and inner ring can rotate and axial linear movement with threaded sleeve and valve rod, outer ring non rotating only straight line motion vertically; Optical axis cover is arranged on housing washer, can with housing washer straight line motion vertically; Linear bearing is arranged on optical axis and puts, and is connected with magnetic rheological liquid damper inner core, and it allows optical axis to overlap straight line motion vertically, and itself neither moves vertically, also non rotating.By such structure, can ensure that valve rod energy free spiral rotation moves, again valve rod vibration passing to damper.The second is contained on optical axis valve rod, comprises optical axis cover and linear bearing.Optical axis cover is arranged on optical axis valve rod, does axial reciprocating straight line motion with valve rod; Linear bearing is arranged on optical axis and puts, and is connected with magnetic rheological liquid damper inner core, and allow optical axis cover and valve rod linear reciprocating motion, bearing outer ring itself does not move.By such structure, can ensure that valve rod can free to-and-fro motion, again valve rod vibration passing to damper.Magnetic rheological liquid damper is primarily of inner core, dynamic sheet, quiet shearing sheet, abutment sleeve, the coil sheared around cylinder, and coil, urceolus and end cap form, and damper inner core is connected with linear bearing, and damper urceolus is fixedly connected with support or ground.Valve vibration of bar passes to the inner core of magnetic rheological liquid damper by vibration passing folder, and drive dynamic sheet of shearing to do shearing motion in magnetic flow liquid, the damping force of generation consumes vibrational energy, thus reduces the amplitude of valve valve rod, reaches the vibration and noise reducing object of valve.
Described vibration acquisition analysis & control system, vibration acquisition analytical system involving vibrations acceleration (or speed or displacement) sensor, Signal-regulated kinase, data collecting card, vibration analysis software and computer.Wherein vibration transducer is installed on valve rod, in real time oscillating signal is converted into electrical signal, carry out rectification, filtering by wiring access Signal-regulated kinase, be amplified into data collecting card, be the digital signal calculating function identification through capture card analog-to-digital conversion, then signal accessed computer and obtains the vibration parameters such as amplitude and frequency spectrum by vibration analysis software calculating with analysis.Control system involving vibrations control software design, analog output module and final controlling element.Described vibration control software according to the vibration parameters such as amplitude and frequency spectrum, and in conjunction with valve size, type and damper structure parameter, can calculate the size obtaining required damping force, and export control signal in real time, pass to analog output module, become analogue signal through digital-to-analog conversion, pass to final controlling element.Described final controlling element comprises adjustable DC power supply and magnetic rheological liquid damper.Analog control signal controls adjustable DC electric power outputting current, this controls the coil that electric current is input to magnetic rheological liquid damper in real time, produce the magnetic flow liquid of magnetic fields in damper, the parameters such as the shear yield stress of change magnetic flow liquid and viscosity, thus produce controlled damping force, consume various amplitude, valve vibration energy under frequency, reach valve variable working condition, become aperture time vibration damping and noise reduction.
The present invention has following characteristics:
(1) this device can reduce the vibration and noise that valve many reasons causes.Described mutative damp vibration and noise reducing device is delivered to magnetic rheological liquid damper vibration from valve rod by vibration passing folder, shearing sheet is driven to do shearing motion in damper, rub, be heat energy finally consuming in damping material by vibrational energy by changes mechanical energy, play the effect of damping vibration attenuation.Described mutative damp vibration and noise reducing device is insensitive to valve vibration Producing reason, no matter be that fluid conveying machine (compressor, pump etc.) produces vibration and caused valve vibration by connecting pipe biography ripple and produced noise, or the mechanical vibration noise that fluid impact valve produces, or valve pocket inner fluid instability produces whirlpool and the vortex noise that causes, or valve downstream fluid mixes the jet noise of generation and air pocket strongly, and the hydrodynamic produced that breaks can be effectively suppressed.
(2) vibration passing folder can effectively the vibration passing of valve to magnetic rheological liquid damper, can not affect the corkscrew motion mode of the normal work, particularly threaded valve rod of valve, be the difficult point that valve vibration transmits simultaneously.This transposition adopts the mode of annular bearing with rolling contact and linear bearing combination to reach this object, wherein annular bearing with rolling contact allows valve rod to rotate, linear bearing allows the straight reciprocating motion of valve rod circumference, by the combination of such two kinds of bearings, valve rod energy free spiral rotation moves, normal work, vibrational energy effectively passes to damper simultaneously.
(3) mutative damp vibration and noise reducing device, adopts integral structure, and namely the vibration passing folder of this device, damper and valve rod combine, and have structure simply, the feature that level of integration is high.This device eliminates medium tache, and vibration passing is effectively direct, free of losses.When pipe-line system variable working condition or valve opening change, the vibrational energy of valve can change, required damping force also can change accordingly, and magnetic rheological liquid damper provides suitable damping force according to vibrational energy, thus the vibration of control valve when variable working condition, change aperture.
(4) real-time vibration acquisition analysis & control system, involving vibrations collection analysis and control system.Vibration acquisition system involving vibrations sensor, Signal-regulated kinase, data collecting card, vibration analysis software and computer, major function is Real-time Collection and analyzes the vibration parameters such as valve amplitude, frequency spectrum.Vibration control system involving vibrations control software design, analog output module, adjustable DC power supply and magnetic rheological liquid damper, major function is the vibration parameters obtained according to vibration acquisition and analytical system, and in conjunction with valve size, type and damper structure parameter, damping force size needed for computational analysis vibration control and corresponding size of current, then control signal is exported to adjustable DC power supply, regulate the electric current of magnetic rheological liquid damper coil, thus change magnetic intensity, and then control the damping of magnetic rheological liquid damper, realize the object initiatively reducing valve vibration and noise.Vibration acquisition and analytical system and vibration control system form the negative feedback control loop of a closed loop, the vibration and noise of Real-Time Monitoring and control valve, ensure the work of valve stability and safety.
The present invention has following advantage compared with existing valve vibration and noise reducing device:
(1) valve vibration that causes of the reason such as this device fluid delivery mechanical vibration transmission, fluid impact, vortical noise and jet noise and noise can effectively suppress, applied widely.
(2) according to the difference of the kind of valve, size and structure, the mounting point of this device, quantity and structure can adjust flexibly, reduce vibration and noise when variety classes valve, different vibrational state.
(3) valve vibration Real-time Collection and control.By monitoring valve vibration state, the damping size of active adjustment magnetic rheological liquid damper, vibration and noise during valve stable operation can not only be suppressed, vibration in aperture situation can also be become at pipe-line system variable working condition, valve by control valve, ensure valve long-term safety stable operation.
(4) this damper is to provide the damping force of dynamic response velocity correlation, does not bear static load, does not namely change the original support of valve system, can not the rigidity of influential system.
Accompanying drawing explanation
Fig. 1 is the exemplary block diagram that mutative damp vibration and noise reducing device is arranged on threaded valve rod
Fig. 2 is that magnetic rheological liquid damper shears sheet partial enlarged drawing
Fig. 3 is the exemplary block diagram that mutative damp vibration and noise reducing device is arranged on optical axis valve rod
Fig. 4 is mutative damp vibration and noise reducing device control system flow chart
Fig. 5 is the connection diagram that mutative damp vibration and noise reducing device is installed on stop valve
Fig. 6 is the connection diagram that mutative damp vibration and noise reducing device is installed on butterfly valve
In figure: 1, screw; 2, coil; 3, abutment sleeve; 4, quiet shearing sheet; 5, dynamic shearing sheet; 6, inner core; 7, rolling bearing; 8, screw thread valve rod; 9, threaded sleeve; 10, optical axis cover; 11, linear bearing; 12, coil is around cylinder; 13, end cap; 14, urceolus; 15, optical axis valve rod; 16, optical axis cover; 17, magnetic flow liquid; 18, vibration transducer; 19, oscillating signal; 20, Signal-regulated kinase; 21, data collecting card; 22, computer; 23, control signal; 24, analog output module; 25, adjustable DC power supply; 26, valve body; 27, support; 28, O shape circle.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention is a kind of mutative damp vibration and noise reducing device for valve, Real-Time Monitoring valve vibration, the damping force of online active adjustment magnetic rheological liquid damper continuously, realizes the vibration and noise of valve under pipe-line system steady working condition, variable working condition and valve become aperture situation and controls.Fig. 1 is the exemplary block diagram that mutative damp vibration and noise reducing device is arranged on threaded valve rod.This device is driven by mutative damp vibration and noise reducing device control system, this device main involving vibrations transmission folder and magnetic rheological liquid damper; Vibration passing folder is made up of threaded sleeve 9, rolling bearing 7, optical axis cover 10 and linear bearing 11; Magnetic rheological liquid damper is made up of around cylinder 12, coil 2, urceolus 14 and end cap 13 inner core 6, dynamic shearing sheet 5, quiet shearing sheet 4, abutment sleeve 3, coil; Threaded sleeve 9 and valve rod 8 are installed by screw-thread fit, and rolling bearing 7 is arranged on threaded sleeve 9, and the inner ring of rolling bearing 7 to be spinned motion with threaded sleeve 9 and valve rod 8, the outer ring non rotating of rolling bearing 7 only straight line motion vertically; Optical axis cover 10 is arranged on the outer ring of rolling bearing 7, can with rolling bearing 7 outer ring straight line motion vertically; Linear bearing 11 is arranged on optical axis cover 10, and it allows optical axis cover 10 straight line motion vertically, and itself neither moves vertically, also non rotating; Linear bearing 11 is connected with magnetic rheological liquid damper inner core 6, and damper urceolus 14 is fixedly connected with support 27 or ground, inner core 6 and enclosed 28 sealed by O shape between end cap 13 and urceolus 14; Urceolus 14 and end cap 13 are fastenedly connected by the screw 1 of end circumference; Circumferential position in end cap 13 is provided with abutment sleeve 3, and abutment sleeve 3 is double-layer hollow circle structure, and be provided with coil outside it around cylinder 12, inner side is provided with inner core 6; In the double-layer hollow structure of described abutment sleeve 3, evenly interlaced arrangement has shearing sheet 5, quiet shearing sheet 4, and dynamic sheet 5 of shearing is arranged near inner core 6 side, and quiet shearing sheet 4 is arranged near coil around cylinder 12 side; When valve rod 8 vibrates, vibrate the vibration passing folder that can ensure that valve rod 8 free spiral rotation moves by such and pass to damper inner core 6, and then drive dynamic sheet 5 of shearing to do shearing motion in magnetic flow liquid 17, produce damping force, consume the vibrational energy of valve rod 8, thus reduce the amplitude of valve rod 8, noise decrease.
Fig. 3 is the exemplary block diagram that mutative damp vibration and noise reducing device is arranged on optical axis valve rod.Main involving vibrations transmission folder and magnetic rheological liquid damper; Vibration passing folder is made up of optical axis cover 16 and linear bearing 11; Magnetic rheological liquid damper is made up of threaded sleeve 9, rolling bearing 7, optical axis cover 10 and linear bearing 11; Optical axis cover 16 is arranged on optical axis valve rod 15, does axial reciprocating straight line motion with valve rod 15; Linear bearing 11 is arranged on optical axis cover 16, and allowing optical axis cover 16 and valve rod 15 linear reciprocating motion, itself does not move in outer ring; Linear bearing 11 is connected with magnetic rheological liquid damper inner core 6, and damper urceolus 14 is fixedly connected with support 27 or ground.When valve rod 15 vibrates, vibrate and can ensure that the vibration passing folder of valve rod 14 linear reciprocating motion passes to damper inner core 6 by such one, dynamic sheet 5 of shearing is driven to do shearing motion in magnetic flow liquid 17, produce damping force, consume the vibrational energy of valve rod 15, thus reduce the amplitude of valve rod 15, reach the object of vibration and noise reducing.
Fig. 4 is mutative damp vibration and noise reducing device control system flow chart.Fig. 5 is the connection diagram being installed on stop valve based on the mutative damp vibration and noise reducing device of accompanying drawing 4 control system, and Fig. 6 is the connection diagram that mutative damp vibration and noise reducing device is installed on butterfly valve.Mainly comprise mutative damp device, in real time vibration acquisition analytical system and vibration control system.The wherein real-time main involving vibrations sensor 18 of vibration acquisition system, Signal-regulated kinase 20 and data collecting card 21; Vibration control system comprises computer 22, analog output module 23 and adjustable DC power supply 25.Vibration transducer 18 is installed on bonnet flange and valve rod place Real-time Collection valve system valve body and valve vibration of bar, obtain vibration electrical signal 19, through Signal-regulated kinase 20 rectification, filtering, be amplified into data collecting card 21 and be converted to digital signal, the computational analysis of machine 22 calculating analysis software obtains the vibration parameters such as amplitude and frequency spectrum as calculated, control software design is according to vibration parameters and in conjunction with valve size, type and damper structure parameter, relevant control algorithm is adopted to obtain real-time control signal 23, pass to analog output module 24, control simulation signal is become through digital-to-analog conversion, pass to adjustable DC power supply 25 and regulate the electric current being input to magnetic rheological liquid damper coil 2 in real time, produce the controlled magnetic flow liquid of magnetic fields in damper, change shear yield stress and the viscosity relevant parameter of magnetic flow liquid, thus obtain controlled damping force, consume decay various amplitude, valve vibration under frequency, form the active closed-loop control system of the continuous mutative damp device of real-time online, realize valve variable working condition, become vibration damping and the noise reduction of aperture.
Described control algorithm is servo antrol algorithm, segment control method or pid control algorithm.
Claims (4)
1. for a mutative damp vibration and noise reducing device for valve, it is characterized in that: this device is driven by mutative damp vibration and noise reducing device control system, when this device is arranged on threaded valve rod, this device main involving vibrations transmission folder and magnetic rheological liquid damper; Vibration passing folder is made up of threaded sleeve (9), rolling bearing (7), optical axis cover (10) and linear bearing (11); Magnetic rheological liquid damper is made up of around cylinder (12), coil (2), urceolus (14) and end cap (13) inner core (6), dynamic shearing sheet (5), quiet shearing sheet (4), abutment sleeve (3), coil; Threaded sleeve (9) and valve rod (8) are installed by screw-thread fit, rolling bearing (7) is arranged on threaded sleeve (9), the inner ring of rolling bearing (7) to be spinned motion with threaded sleeve (9) and valve rod (8), the outer ring non rotating of rolling bearing (7) only straight line motion vertically; Optical axis cover (10) is arranged on the outer ring of rolling bearing (7), can with rolling bearing (7) outer ring straight line motion vertically; Linear bearing (11) is arranged on optical axis cover (10), and it allows optical axis cover (10) straight line motion vertically, and itself neither moves vertically, also non rotating; Linear bearing (11) is connected with magnetic rheological liquid damper inner core (6), damper urceolus (14) is fixedly connected with support (27) or ground, inner core (6) and enclosed (28) sealed by O shape between end cap (13) and urceolus (14); Urceolus (14) and end cap (13) are fastenedly connected by the screw (1) of end circumference; Circumferential position in end cap (13) is provided with abutment sleeve (3), abutment sleeve (3) is double-layer hollow structure, be provided with coil outside it around cylinder (12), inner side is provided with magnetic rheological liquid damper inner core (6); In the double-layer hollow structure of described abutment sleeve (3), evenly interlaced arrangement has shearing sheet (5), quiet shearing sheet (4), dynamic sheet (5) of shearing is arranged near inner core (6) side, and quiet shearing sheet (4) is arranged near coil around cylinder (12) side; When valve rod (8) vibrates, vibrate the vibration passing folder that can ensure that valve rod 12 free spiral rotation moves by such and pass to damper inner core (6), and then drive dynamic sheet (5) of shearing to do shearing motion in magnetic flow liquid (17), produce damping force, consume the vibrational energy of valve rod (8), thus reduce the amplitude of valve rod (8), noise decrease.
2. a kind of mutative damp vibration and noise reducing device for valve according to claim 1, is characterized in that: when this device is arranged on optical axis valve rod, this device main involving vibrations transmission folder and magnetic rheological liquid damper; Vibration passing folder is made up of optical axis cover (16) and linear bearing (11); Magnetic rheological liquid damper is made up of threaded sleeve (9), rolling bearing (7), optical axis cover (10) and linear bearing (11); Optical axis cover (16) is arranged on optical axis valve rod (15), does axial reciprocating straight line motion with valve rod (15); Linear bearing (11) is arranged on optical axis cover (16), and allowing optical axis cover (16) and valve rod (15) linear reciprocating motion, itself does not move in outer ring; Linear bearing is connected with magnetic rheological liquid damper inner core (6), and damper urceolus (14) is fixedly connected with support (27) or ground; When valve rod (15) vibrates, vibrate and can ensure that the vibration passing folder of valve rod 14 linear reciprocating motion passes to damper inner core (6) by such one, dynamic sheet (5) of shearing is driven to do shearing motion in magnetic flow liquid (17), produce damping force, consume the vibrational energy of valve rod (15), thus reduce the amplitude of valve rod (15), reach the object of vibration and noise reducing.
3. a kind of mutative damp vibration and noise reducing device for valve according to claim 1, is characterized in that: mutative damp vibration and noise reducing device control system mainly comprises mutative damp device, in real time vibration acquisition analytical system and vibration control system, the wherein real-time main involving vibrations sensor (18) of vibration acquisition system, Signal-regulated kinase (20) and data collecting card (21), vibration control system comprises computer (22), analog output module (23) and adjustable DC power supply (25), vibration transducer (18) is installed on bonnet flange and valve rod place Real-time Collection valve system valve body and valve vibration of bar, obtain vibration electrical signal (19), through Signal-regulated kinase (20) rectification, filtering, be amplified into data collecting card (21) and be converted to digital signal, machine (22) calculating analysis software computational analysis obtains the vibration parameters such as amplitude and frequency spectrum as calculated, control software design is according to vibration parameters and in conjunction with valve size, type and damper structure parameter, relevant control algorithm is adopted to obtain real-time control signal (23), pass to analog output module (24), control simulation signal is become through digital-to-analog conversion, pass to adjustable DC power supply (25) and regulate the electric current being input to magnetic rheological liquid damper coil (2) in real time, produce the controlled magnetic flow liquid of magnetic fields in damper, change shear yield stress and the viscosity relevant parameter of magnetic flow liquid, thus obtain controlled damping force, consume decay various amplitude, valve vibration under frequency, form the active closed-loop control system of the continuous mutative damp device of real-time online, realize valve variable working condition, become vibration damping and the noise reduction of aperture.
4. a kind of mutative damp vibration and noise reducing device for valve according to claim 3, is characterized in that: described control algorithm is servo antrol algorithm, segment control method or pid control algorithm.
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