CN104295651A - Variable-damping hybrid power vibration absorber - Google Patents
Variable-damping hybrid power vibration absorber Download PDFInfo
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- CN104295651A CN104295651A CN201410557795.6A CN201410557795A CN104295651A CN 104295651 A CN104295651 A CN 104295651A CN 201410557795 A CN201410557795 A CN 201410557795A CN 104295651 A CN104295651 A CN 104295651A
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- translation plates
- mounting plate
- connecting rod
- fixed
- groove
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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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
- F16F6/005—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid using permanent magnets only
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention aims to provide a variable-damping hybrid power vibration absorber. A groove is formed in a base, two translation plates are arranged in the groove and contact with the same through balls on two sides of a baseplate, a mounting plate positioned between the translation plates is fixed on the groove, permanent magnets are mounted on the upper portions of the mounting plate and the translation plates respectively, a magnet is arranged on each of two sides of the mounting plate, the magnets on the two sides of the mounting plate and the magnets on the translation plates form two magnetic fields, two uprights are welded on the base, a parallel plate spring is mounted on each upright, a mass block is fixed between the parallel plate springs, two conductor mass blocks are fixed on two sides of the mass block and positioned in the magnetic fields respectively, and electromagnetic coils wound on two conductors form an electromagnetic driver. Damping of a main system is realized by timely changing a gap of the magnetic fields to adjust damping coefficient according to changes of outside excitation frequency or by actively controlling vibration of the vibration absorber through action of electromagnetic exciting force in the magnetic fields.
Description
Technical field
What the present invention relates to is a kind of bump leveller.
Background technique
Mechanical vibration not only can reduce the Performance And Reliability of machine itself, also can trigger noise and environmental pollution, cause damage to human body, thus effectively weaken when equipment works and eliminate that to vibrate the harm brought be very necessary.For this reason, people investigated various method to suppress the harm of vibration, wherein dynamic vibration absorber is exactly a kind of effective means, and it is made up of quality of assistance and spring and damping, is utilize resonator system absorption object vibrational energy to reduce the equipment of object vibration.
Traditional dynamic vibration absorber belongs to passive-type bump leveller, though have the advantages such as structure is simple, good damping result, its parameter such as rigidity, quality is immutable, and natural frequency is unadjustable, and working band is very narrow.There is again half active and active vibrator afterwards, but half active vibrator fundamentally belongs to passive mode, inevitably there is the shortcoming of some passive-types, and for active vibrator, if there is a part of defectiveness in error or control loop in Control System Design, then shock-absorbing means may become a vibrating device, becomes destabilizing factor.
Refer in the patent of application number 201310653051.X a kind of passive/half initiatively selectable cantilever beam type dynamic vibration absorber, it drives driving gear to rotate mainly through stepper motor, when gear shaft rotates, mass block moves in the horizontal direction, thus change the rigidity of bump leveller, regulate the frequency of okperation of bump leveller.Although this patent can realize semi-active control, the natural frequency probably departing from vibration damping object due to excited frequency is comparatively far away, and therefore its shock attenuation result is limited.
A kind of rigidity-variable full-automatic power vibration-absorber is refer in the patent of application number 200710022495.8, it utilizes electromagnetic field generation active force to directly act on the mass block of damping object and main system, the direction of this active force is contrary with the direction of vibration moment of damping object, thus plays the effect suppressing vibration.But this patent material requested cost is higher, and should not control, higher to environmental requirement, applicability is poor, and application is comparatively narrow.
Refer to a kind of controlling method of variable mass dynamic vibration absorber in the patent of application number 201310303892.8, the method obtains extraneous excited frequency by carrying out Fourier transformation to the signal collected, and utilizes the excited frequency obtained to control bump leveller.But the result that the method obtains not necessarily optimal solution, and when extraneous random disturbances excitation, its antijamming capability is not enough.
Summary of the invention
The object of the present invention is to provide a kind of mutative damp formula hybrid type dynamic vibration absorber that passive type, semi-active type and active three kinds of working forms combine.
The object of the present invention is achieved like this:
A kind of mutative damp formula of the present invention hybrid type dynamic vibration absorber, it is characterized in that: comprise pedestal, control tower pedestal, pedestal has groove, in a pair subtend face of groove, blind hole is set, in blind hole, ball is installed, the first translation plates is set gradually in groove, mounting plate, second translation plates, two sides of the first translation plates and the second translation plates all contact with ball, mounting plate is fixed in groove, magnetite frame is all installed in the inner side of the first translation plates and the second translation plates and the both sides of mounting plate, all magnetite is installed in magnetite frame, crank-connecting rod is installed by the first rotating shaft in mounting plate side, first connecting rod and second connecting rod are installed respectively by the second rotating shaft and the 3rd rotating shaft in first translation plates and the second translation plates side, first connecting rod is connected with bottom crank-connecting rod, second connecting rod is connected with crank-connecting rod top, the joint of first connecting rod and second connecting rod and crank-connecting rod installs the first truckle and the second truckle respectively, control tower pedestal is fixed with fixing column and motor cabinet, mounted motor on motor cabinet, the output terminal of motor installs large pulley, rope is wound around the first truckle successively, large pulley and the second truckle, one end of rope is directly connected and fixed post, the other end of rope is connected and fixed post by pull-off spring, clutch shaft bearing seat and the second bearing support is fixed with in the groove of pedestal, clutch shaft bearing seat and the second bearing support lay respectively at the outside of the first translation plates and the second translation plates, first translation plates, second translation plates, mounting plate all arranges through hole, the two ends of main shaft are separately fixed on clutch shaft bearing seat and the second bearing support, the middle part of main shaft is successively through the first translation plates, the through hole of mounting plate and the second translation plates, pedestal is fixed with the first column and the second column, first column and the second column lay respectively at two sides of mounting plate, first column all installs parallel leaf spring with on the second column, installation quality block between two parallel leaf springs, the both sides of mass block fix a conductor mass block respectively, two conductor mass blockes are wound around electromagnetic coil.
The present invention can also comprise:
1, between ball and blind hole, spring is installed.
2, the main shaft between clutch shaft bearing seat and the first translation plates is installed the first retaining spring, the main shaft between the second bearing support and the second translation plates is installed the second retaining spring.
Advantage of the present invention is: the present invention proposes the hybrid type dynamic vibration absorber that a kind of passive type tuning based on mutative damp, semi-active type and active three kinds of working forms combine.Magnetic damper is introduced in traditional bump leveller, according to the change of extraneous excited frequency, in time change the gap adjustment damping constant in magnetic field, or the vibration of effect ACTIVE CONTROL bump leveller by electromagnetic excitation power in magnetic field, to realize the damping effect to main system.
Compared with traditional bump leveller, the present invention has following advantage:
1, damping frequency bandwidth, by regulating the magneto damped coefficient of bump leveller and providing electromagnetic excitation power, follows the tracks of the vibration frequency of vibration damping object, reaches significant effectiveness in vibration suppression all the time in wider scope;
2, because bump leveller can provide active force, even if make the energizing frequency acted on vibration damping object deviate from the natural frequency of vibration damping object, bump leveller also can when providing less active force, reach good shock attenuation result, ensure that has good effectiveness in vibration suppression in wider frequency range;
3, three kinds of working methods are exchanged in different operating environments, and the energy of consumption is little;
4, can plural parallel stage, realize modular design, form the good multiple dynamic vibration absorber of robustness;
5, utilize optimal correction theory to carry out Control System Design, introduce the control strategy that state controls, the response under can effectively suppressing random disturbances to encourage, improves the stability of a system;
6, structure is simple, and stable performance, absorbing efficiency is high, and system reliability is high.
Accompanying drawing explanation
Fig. 1 is plan view of the present invention;
Fig. 2 be the present invention remove protected enclosure be connected with the screw on it after plan view;
Fig. 3 is left view of the present invention;
Fig. 4 is control flow chart of the present invention;
Fig. 5 is control system the general frame of the present invention;
Fig. 6 is semi-active control block diagram of the present invention;
Fig. 7 is ACTIVE CONTROL block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 7, the counterbore 25 on pedestal 17 is utilized bump leveller and damping object to be fixed, and utilize the positioning pin hole 28 on pedestal 17 to realize location, protected enclosure 4 is connected by screw 33 and is fixed on pedestal 17, and be provided with packing ring 19 between the two, pedestal 17 has groove, two translation plates 23 (being equivalent to slide block) in two-way slidercrank mechanism are arranged in a groove, by ball 26 and groove two side contacts of base plate both sides, ball 26 is contained in the blind hole of base plate both sides, between ball 26 and blind via bottom, spring is housed, be beneficial to translation plates 23 installation in a groove and location.The mounting plate 5 being positioned at two translation plates 23 neutral positions is connected by screw 15 and fixes in a groove, mounting plate 5 is provided with a sensor 12, and the side on the both sides on mounting plate 5 top and translation plates 23 top is connected by screw and is separately installed with magnetite frame 24, permanet magnet 1 is embedded with in magnetite frame 24, the permanet magnet 1 of such mounting plate 5 both sides, just constitutes two magnetic fields with the permanet magnet 1 in translation plates 23.In addition, two translation plates 23 are fixed with two connecting rods 16 respectively by rotating shaft 32, the other end of two connecting rods 16 is connected with crank-connecting rod 13 respectively, crank-connecting rod 13 is arranged on mounting plate 5 by rotating shaft 31 simultaneously, the mounting point of rotating shaft 31 is in the intermediate portion of crank-connecting rod 13, so just crank-connecting rod 13 be divide into two-part, every part can regard a crank as, so just with two connecting rods 16, two translation plates 23 constitute two-way slidercrank mechanism, rotating crank, namely rotating crank connecting rod 13 just can realize two translation plates 23 and moves round about.Two connecting rods 16 are respectively provided with a truckle 14 with crank-connecting rod 13 joint, it is wound with rope 7, rope 7 is wrapped on large pulley 8 and two truckles 14 respectively, its end one end is fixed on the column of control tower pedestal 10, the other end is connected with locking spring 9, locking spring 9 is fixed on the column of control tower pedestal 10, large pulley is arranged on motor 27 end, motor 27 is connected by screw and is fixed on motor cabinet 11, motor cabinet 11 is connected by screw and is fixed on control tower pedestal 10, below just cable traction is constituted, move for driving two-way slidercrank mechanism.Main shaft 22 is by the through hole in two translation plates 23 and mounting plate 5, two ends are fixed on bearing support 20, can ensure that two translation plates 23 move along axis in moving process like this, main shaft portion between translation plates 23 and bearing support 20 is equipped with the retaining spring 21 being in compressive state, to its pretension positioning action of translation plates 23.Pedestal 17 is welded with two columns, it is connected by screw and is separately installed with a parallel leaf spring 29, be connected by screw between two parallel leaf springs 29 and be fixed with a mass block 3, mass block 3 is provided with a sensor 30, and mass block 3 both sides are connected by screw and are fixed with two conductor mass blockes 2, lay respectively among two magnetic fields, the electromagnetic coil 6 that two conductor mass blockes 2 are wound around constitutes electromagnetic driver.
The flow process of the known control system of composition graphs 4 is as described below: after determining that control system initialization is normal, data capture is carried out to controlled device (dynamic vibration absorber), the data collected are through Treatment Analysis, judge the working method of controlled device, namely one is selected in passive, half active, initiatively three, if working method is half active or active mode, is then combined the data collected by controller, calculate optimal solution, send to the actuator of controlled device to produce corresponding action.
Composition graphs 5, Fig. 6, Fig. 7 known control system function is as described below: the sensor be arranged on mass block and mounting plate carries out signals collecting to the Vibration Condition of bump leveller and damping object respectively, in addition, data acquisition module also needs to carry out signals collecting to the electric current in coil, the signal obtained of sampling carries out AD conversion after the process such as amplification filtering, the digital signal obtained is admitted to control module and carries out analytical calculation, control command signal is sent to driver module, control module is divided into two-way, one tunnel is that optical coupling isolation circuit adds power amplifier drive circuit, for electric current in control coil, one tunnel is motor-drive circuit, for controlling the rotation of motor.State feedback control is adopted in control module, better improve the performance of system, when carrying out ACTIVE CONTROL, the suitable current value of system is calculated by state feedback controller, change into the driver module that control signal sends to electric current in control coil, when carrying out semi-active control, the control of motor adopts state feedback control and PID to control to combine, first calculate the suitable gapped magnetic field value of system by state feedback controller, then this value is delivered in PID control as the position quantity expected, suitable amount of motor rotation is obtained in PID controls, change into control signal and send to the driver module controlling electric machine rotation.
The functional realiey of composition graphs 1-7 known mutative damp formula hybrid type dynamic vibration absorber is as described below: when in electromagnetic coil 6 during obstructed electric current, conductor mass block 2 moves up and down, can magnetically damped be produced between permanet magnet 1 and electromagnetic coil 6 thus play the function of passive-type dynamic vibration absorber, after passing into suitable electric current in electromagnetic coil 6, above-below direction can produce the electromagnetic excitation power hindering conductor mass block 2 to move, thus played the function of active dynamic vibration absorber, in addition, motor 27 drives two-way slidercrank mechanism by rope 7, thus drive two translation plates 23 to move, change the gap in magnetic field, regulate magnetically damped coefficient, thus played the function of half active dynamic vibration absorber,
Dynamic vibration absorber is made up of main body and control tower part, main body comprises pedestal, protected enclosure, main shaft, bearing support, supporting base, mounting plate, two-way slidercrank mechanism, parallel leaf spring, mass block, permanet magnet, electromagnetic coil, control tower part comprises pedestal, motor cabinet, motor, pulley, protected enclosure is connected by screw and is fixed on pedestal, pedestal has groove, two translation plates (being equivalent to slide block) in two-way slidercrank mechanism are arranged in a groove, by ball and groove two side contacts of base plate both sides, the mounting plate be positioned in the middle of two translation plates is connected by screw to be fixed in a groove, mounting plate and translation plates top are separately installed with permanet magnet, and respectively there is a magnetite both sides of mounting plate, two magnetic fields are formed with the magnetite in translation plates, this outer frame is welded with two columns, it is connected by screw and is separately installed with a parallel leaf spring, be connected by screw between two parallel leaf springs and be fixed with a mass block, mass block both sides are connected by screw and are fixed with two conductor mass blockes, lay respectively among two magnetic fields, the electromagnetic coil that two conductors are wound around constitutes electromagnetic driver, when in coil during obstructed electric current, conductor moves up and down, magnetically damped can be produced thus the function of performance passive-type dynamic vibration absorber between magnetite and coil, after passing into suitable electric current in coil, above-below direction can produce the electromagnetic excitation power hindering conductor motion, thus played the function of active dynamic vibration absorber, in addition, be arranged on two-way slidercrank mechanism crank to be connected with the pulley be arranged on motor end by rope with the pulley of connecting rod joint, just two translation plates can be driven to move by motor, change the gap in magnetic field, regulate magnetically damped coefficient, thus played the function of half active dynamic vibration absorber,
Control system is made up of data acquisition module, control module, driver module, the sensor be arranged on mass block and mounting plate carries out data capture to the Vibration Condition of bump leveller and damping object respectively, in addition, data acquisition module also needs to carry out signals collecting to the electric current in coil, the data collected are through the analytical calculation of control module, control command signal is sent to driver module, control module is divided into two-part, a part is used for electric current in control coil, and a part is for controlling the rotation of motor.
Two-way slidercrank mechanism comprises two translation plates and three connecting rods, two connecting rods wherein respectively have one end to be arranged in translation plates by rotating shaft, the other end is arranged on the two ends of the 3rd connecting rod respectively, by rotating shaft, the 3rd connecting rod is arranged on the mounting plate between two translation plates simultaneously, rotating shaft mounting point is in the intermediate portion of the 3rd connecting rod, so just this connecting rod be divide into two-part, every part can regard a crank as, with two other connecting rod, two translation plates constitute two slidercrank mechanisms, rotating crank, namely rotate the 3rd connecting rod just can realize two translation plates and move round about.
Main shaft is respectively by the through hole on two translation plates and mounting plate, two ends are fixed on bearing support, can ensure that two translation plates move along axis in moving process like this, main shaft portion between translation plates and bearing support is equipped with the retaining spring being in compressive state, to its pretension positioning action of translation plates, the base plate both sides of translation plates are contacted with base recess by ball, ball is contained in the blind hole of base plate both sides, between ball and blind via bottom, spring is housed, is conducive to installation and the location of translation plates like this.
After cable traction walks around three pulleys, rope one end is fixed on the column of control tower pedestal, and the other end is connected with locking spring, and spring is fixed on the column of control tower pedestal.
State feedback control is adopted in control module, better improve the performance of system, when carrying out ACTIVE CONTROL, the suitable current value of system is calculated by state feedback controller, change into the driver module that control signal sends to electric current in control coil, when carrying out semi-active control, the control of motor adopts state feedback control and PID to control to combine, first calculate the suitable gapped magnetic field value of system by state feedback controller, then this value is delivered in PID control as the position quantity expected, controlled to obtain suitable amount of motor rotation by PID, change into control signal and send to the driver module controlling electric machine rotation.
That dynamic vibration absorber has is passive, half initiatively and initiatively three kinds of working methods, which forms the complementation between different operating mode, improves ability to work and the Applicable scope of bump leveller.
Claims (3)
1. a mutative damp formula hybrid type dynamic vibration absorber, it is characterized in that: comprise pedestal, control tower pedestal, pedestal has groove, in a pair subtend face of groove, blind hole is set, in blind hole, ball is installed, the first translation plates is set gradually in groove, mounting plate, second translation plates, two sides of the first translation plates and the second translation plates all contact with ball, mounting plate is fixed in groove, magnetite frame is all installed in the inner side of the first translation plates and the second translation plates and the both sides of mounting plate, all magnetite is installed in magnetite frame, crank-connecting rod is installed by the first rotating shaft in mounting plate side, first connecting rod and second connecting rod are installed respectively by the second rotating shaft and the 3rd rotating shaft in first translation plates and the second translation plates side, first connecting rod is connected with bottom crank-connecting rod, second connecting rod is connected with crank-connecting rod top, the joint of first connecting rod and second connecting rod and crank-connecting rod installs the first truckle and the second truckle respectively, control tower pedestal is fixed with fixing column and motor cabinet, mounted motor on motor cabinet, the output terminal of motor installs large pulley, rope is wound around the first truckle successively, large pulley and the second truckle, one end of rope is directly connected and fixed post, the other end of rope is connected and fixed post by pull-off spring, clutch shaft bearing seat and the second bearing support is fixed with in the groove of pedestal, clutch shaft bearing seat and the second bearing support lay respectively at the outside of the first translation plates and the second translation plates, first translation plates, second translation plates, mounting plate all arranges through hole, the two ends of main shaft are separately fixed on clutch shaft bearing seat and the second bearing support, the middle part of main shaft is successively through the first translation plates, the through hole of mounting plate and the second translation plates, pedestal is fixed with the first column and the second column, first column and the second column lay respectively at two sides of mounting plate, first column all installs parallel leaf spring with on the second column, installation quality block between two parallel leaf springs, the both sides of mass block fix a conductor mass block respectively, two conductor mass blockes are wound around electromagnetic coil.
2. a kind of mutative damp formula hybrid type dynamic vibration absorber according to claim 1, is characterized in that: be provided with spring between ball and blind hole.
3. a kind of mutative damp formula hybrid type dynamic vibration absorber according to claim 1 and 2, it is characterized in that: the main shaft between clutch shaft bearing seat and the first translation plates is installed the first retaining spring, the main shaft between the second bearing support and the second translation plates is installed the second retaining spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557795.6A CN104295651B (en) | 2014-10-20 | 2014-10-20 | A kind of damp type mixed type dynamic vibration absorber that becomes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557795.6A CN104295651B (en) | 2014-10-20 | 2014-10-20 | A kind of damp type mixed type dynamic vibration absorber that becomes |
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| Publication Number | Publication Date |
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| CN104295651A true CN104295651A (en) | 2015-01-21 |
| CN104295651B CN104295651B (en) | 2016-05-04 |
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| CN201410557795.6A Expired - Fee Related CN104295651B (en) | 2014-10-20 | 2014-10-20 | A kind of damp type mixed type dynamic vibration absorber that becomes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108694881A (en) * | 2018-06-29 | 2018-10-23 | 华南理工大学 | A kind of experiment device for teaching for dynamic vibration absorber performance demonstration |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3406728B2 (en) * | 1995-04-20 | 2003-05-12 | 日本放送協会 | Anti-vibration device for TV camera |
| CN103291828A (en) * | 2013-04-03 | 2013-09-11 | 哈尔滨工程大学 | Serially-connected electromagnetic semi-active vibration absorber with asymmetrical tooth pitches |
| DE102012102833A1 (en) * | 2012-04-02 | 2013-10-02 | Contitech Vibration Control Gmbh | Actuator for damping low-frequency vibrations |
| CN203641393U (en) * | 2013-12-05 | 2014-06-11 | 哈尔滨工程大学 | Passive/semi-active selectable cantilever dynamic absorber |
| CN204175848U (en) * | 2014-10-20 | 2015-02-25 | 哈尔滨工程大学 | A kind of mutative damp formula hybrid type dynamic vibration absorber |
-
2014
- 2014-10-20 CN CN201410557795.6A patent/CN104295651B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3406728B2 (en) * | 1995-04-20 | 2003-05-12 | 日本放送協会 | Anti-vibration device for TV camera |
| DE102012102833A1 (en) * | 2012-04-02 | 2013-10-02 | Contitech Vibration Control Gmbh | Actuator for damping low-frequency vibrations |
| CN103291828A (en) * | 2013-04-03 | 2013-09-11 | 哈尔滨工程大学 | Serially-connected electromagnetic semi-active vibration absorber with asymmetrical tooth pitches |
| CN203641393U (en) * | 2013-12-05 | 2014-06-11 | 哈尔滨工程大学 | Passive/semi-active selectable cantilever dynamic absorber |
| CN204175848U (en) * | 2014-10-20 | 2015-02-25 | 哈尔滨工程大学 | A kind of mutative damp formula hybrid type dynamic vibration absorber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108694881A (en) * | 2018-06-29 | 2018-10-23 | 华南理工大学 | A kind of experiment device for teaching for dynamic vibration absorber performance demonstration |
| CN108694881B (en) * | 2018-06-29 | 2024-07-05 | 华南理工大学 | Teaching experiment device for demonstrating performance of dynamic vibration absorber |
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| CN104295651B (en) | 2016-05-04 |
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Granted publication date: 20160504 Termination date: 20211020 |