CN104196948A - Energy feedback type self-sensing magnetorheological damper - Google Patents
Energy feedback type self-sensing magnetorheological damper Download PDFInfo
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- CN104196948A CN104196948A CN201410424836.4A CN201410424836A CN104196948A CN 104196948 A CN104196948 A CN 104196948A CN 201410424836 A CN201410424836 A CN 201410424836A CN 104196948 A CN104196948 A CN 104196948A
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Abstract
The invention discloses an energy feedback type self-sensing magnetorheological damper. The energy feedback type self-sensing magnetorheological damper is characterized by comprising a pure shearing type magnetorheological damper body, an energy feedback mechanism used for converting mechanical energy into electric energy, and a rotating speed sensor, the pure shearing type magnetorheological damper body converts linear movement of a linear magnetorheological damper piston rod into rotational movement by means of a ball screw pair mechanism, the shearing mode which is one of the working modes of magnetorheological liquid is effectively utilized, and stepless damping force controllability of the magnetorheological damper is achieved by arranging a shearing disc, a shearing ring and a corresponding electromagnetic coil. According to the energy feedback type self-sensing magnetorheological damper, by means of the shearing mode of the magnetorheological liquid, the range of dynamic damping ratios is effectively widened, and a more effective control range is provided for a high-speed impact and low-speed vibration control system; both the electric energy feedback performance and movement state self-sensing performance are realized, energy supply of a semi-active magnetorheological damper and the control system of the semi-active magnetorheological damper is achieved, and the problems, related to installation space, system weight, cost and reliability, caused by additional installation of a state feedback sensor are solved.
Description
Technical field
The present invention relates to have electric energy feedback performance and motion state from the magneto-rheological vibration damper of perceptual performance, relate in particular to a kind of energy regenerative type self-sensing magneto-rheological vibration damper that is applicable to bicycle, motorcycle, automobile, truck, steamer, train, aircraft, bridge, building, sports facility and other vibration/shock control system.
Background technique
Magnetic flow liquid (Magnetorheological fluids) issues magnetisation rheological effect in the effect in magnetic field, and its whole process has reversibility and quick (ms level) characteristic, is called as intellectual material.Magnetic flow liquid is mainly made up of liquid carrying and ferromagnetic particle, is a kind of ferromagnetic particle suspension, in the time there is no magnetic fields, and the disorderly and unsystematic arrangement of ferromagnetic particle that suspends in magnetic flow liquid, now magnetic flow liquid shows as Newtonian fluid feature.In the time applying magnetic field at magnetic flow liquid two ends, ferromagnetic particle externally just shows magnetic, neatly line up chain structure according to magnetic line of force direction, the power of chain structure and the size of magnetic intensity are directly related, destroy this chain structure and just need to overcome the shearing stress that magnetic flow liquid produces.
Magneto-rheological vibration damper is one of typical case's application to magnetic flow liquid, there is half outstanding active actuators part performance, comprise that response is fast, damping force can be by regulating field current adjustable continuously, simple in structure, good endurance and low power consumption, and under the boundary dimension of passive damper and installation conditions, can realize alternative completely.Over the last couple of decades, magneto-rheological vibration damper is studied and for forming half active vibration/impulsive control system, comprises the antidetonation system of building, car suspension system, train suspension system, vehicle seat suspension system, helicopter rotor system and other vibration/shock control system.
Fig. 1 has provided the theory diagram of the half active vibration/impulsive control system based on magneto-rheological vibration damper.As shown in Figure 1, while adopting magneto-rheological vibration damper to form half active system, face two unavoidable problems, the one, for realizing the feedback control of half active system, adopt the multidate information of state sensor feedback controlled device and produce and expect that damping force is prerequisite by SC system controller and vibration damper controller Real-time Decision control magneto-rheological vibration damper.The reliability that extra interpolation state sensor will directly cause increasing system installing space, weight and cost and reduce system in half active system.The 2nd, need to provide necessary electric flux for half active system, for providing electric energy, magneto-rheological vibration damper drives on the one hand, on the other hand for electronics provides electric energy.Need the applied environment of additional configuration power supply half active control system based on magneto-rheological vibration damper by restriction.
Based on this, publication number is the Chinese invention patent " self-powered of CN102374255A, the magnetorheological dampers of self-sensing " disclose and a kind ofly there is MR damper simultaneously and drive electric energy from the magnetorheological dampers of supplying with performance and speed self-sensing performance, this magnetorheological dampers is in the coaxial electric energy switching mechanism of the extra interpolation in the outside of existing magnetorheological dampers, the magnetoelectric tachometric transducer of connecting in the axial direction of piston, having realized triple capabilities is integrated in one, be stepless controllable damping force output, the driving electric energy of magnetorheological dampers confess to and piston movement speed from perception.But because this magnetorheological dampers is coaxially arranged with the tube-in-tube structures such as permanent magnet and magnetoelectric sensor in the periphery of existing magnetorheological dampers, so volume and weight is bigger.
Therefore, do not increasing under the condition of magneto-rheological vibration damper outside dimensions, the one, realize the electric energy of magneto-rheological vibration damper and half active control system thereof and supply with and unnecessary feedback power is effectively stored as to other system power supply; The 2nd, realize motion state from perception, make additionally installment state feedback transducer of feedback control system; The 3rd, improve magnetic flow liquid utilization ratio in linear magneto-rheological vibration damper, thereby reduce the cost of magneto-rheological vibration damper and half active control system thereof, structure to magneto-rheological vibration damper is improved, and it is the current problem that should solve that the structure that proposes more superior design principle and magneto-rheological vibration damper meets above demand.
Summary of the invention
The present invention is for avoiding the existing deficiency of above-mentioned prior art, a kind of energy regenerative type self-sensing magneto-rheological vibration damper with energy regenerative performance and speed self-sensing performance is provided, low for magnetic flow liquid utilization ratio in magneto-rheological vibration damper in prior art, controllable damping force and dynamic antivibration ratio are limited in scope, the deficiencies such as energy transfer mechanism and feedback of status sensor bulk are excessive, propose in the outside dimensions that does not change existing magneto-rheological vibration damper, under the prerequisite of the energy consumption of field current and magneto-rheological vibration damper, realize a kind of magnetic flow liquid high usage, electric energy feedback, the magneto-rheological vibration damper of motion state self-sensing.
The present invention is that technical solution problem adopts following technological scheme:
Energy regenerative type self-sensing magneto-rheological vibration damper of the present invention, its structural feature is energy regenerative mechanism and the speed probe that described magneto-rheological vibration damper includes pure shear cut magneto-rheological vibration damper, mechanical energy and be converted to electric energy;
Described pure shear cut magneto-rheological vibration damper comprises outer cylinder body, inner cylinder body and ball screw pair, and described outer cylinder body is coaxial setting with inner cylinder body; In described ball screw pair, at one end utilize inner screw nut and outboard nut to be fixed on the end cap center of circle of outer cylinder body as the leading screw of piston rod, and can compress and enter or restore and exit inner cylinder body, on the madial wall of described inner cylinder body, be provided with and described shearing disk electromagnetic coil one to one, and have respectively and be in neighbouring locational upper shearing annulus and down cut annulus with described electromagnetism electric coil; In described inner cylinder body, madial wall and ball-screw nut by inner cylinder body form enclosed cavity jointly, in described enclosed cavity, be filled with magnetic flow liquid, described ball-screw nut is bearing in by bearing on the upper end cap and middle bracket of described inner cylinder body respectively with prolonged section at two ends, and shaft seal is set to realize the sealing of magnetic flow liquid in described enclosed cavity; By described upper shearing annulus, down cut annulus, electromagnetic coil between upper shearing annulus, down cut annulus, be in the shearing disk on corresponding position with electromagnetic coil, and on corresponding position, the sidewall of inner cylinder body forms the closed flux circuit of electromagnetic coil jointly;
Described energy regenerative mechanism is positioned at inner cylinder body bottom, to be formed by S utmost point permanent magnet stator and the N utmost point permanent magnet stator of three-phase wound rotor and setting in pairs, described S utmost point permanent magnet stator and N utmost point permanent magnet stator are fixed on the madial wall of inner cylinder body, with the supporting energy storage unit that is provided with of described energy regenerative mechanism;
Described speed probe is by forming with the gear of the coaxial setting of piston rod and the permanent magnet being equipped with and hall device, for obtaining the point-to-point speed of piston rod.
The structural feature of energy regenerative type self-sensing magneto-rheological vibration damper of the present invention is also:
Described electromagnetic coil can be replaced by ring shaped axial magnetic field permanent magnet body, or electromagnetic coil is arranged to interior ring surface or the outer ring surface of ring shaped axial magnetic field permanent magnet body.
Described electromagnetic coil or ring shaped axial magnetic field permanent magnet body are at least one group, at least one group of the closed loop flux circuit that itself and described shearing disk, upper shearing annulus, down cut annulus and inner cylinder body sidewall form, the maximum group number of described closed flux circuit depends on the length of inner cylinder body and outer cylinder body.
Described shearing disk, upper shearing annulus, down cut annulus and inner cylinder body are taking high magnetic conductive material as material.
The rotatingshaft of described three-phase wound rotor is set and the extension of rolling ball screw pair screw nut is to be connected by coupling, described gear be positioned at three-phase wound rotor above or below.
Described energy regenerative mechanism also can be set to be made up of permanent magnet rotor and threephase stator winding.
Described speed probe can be also photoelectric encoder, electromagnetic type encoder, change magnetic flux type sensor or capacitive tachometer transducer.
Described speed probe can also be to utilize follow-up signal acquisition cuicuit system, realizes tach signal extract according to the electric power signal of described energy regenerative mechanism feedback.
The structural feature of energy regenerative type self-sensing magneto-rheological vibration damper of the present invention is also:
One end of described leading screw is connected and fixed on the upper end cap home position of outer cylinder body by the mode of upper and lower nut locking, described outer cylinder body utilizes guide ring to contact with inner cylinder body at the other end, and can slide along the outer side wall of described inner cylinder body, the motion guide using described outer cylinder body as piston rod.
Spaced each shearing disk and spaced upper shearing annulus and down cut annulus are staggered one by one on the axial position along inner cylinder body, and described shearing disk is corresponding one by one on axial position with electromagnetism electricity circle.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1. the present invention utilizes ball screw vice mechanism that the linear motion of linear magneto-rheological vibration damper piston rod is converted to and is rotatablely moved, effectively utilize the shear mode in magnetic flow liquid mode of operation, arranged and sheared disk, sheared annulus and corresponding electromagnetic coil and realize the stepless controllability of damping force of magneto-rheological vibration damper.Because the present invention has only used the shear mode of magnetic flow liquid, therefore its dynamic antivibration will effectively improve than scope, and the present invention has more efficiently control range for high speed impact/low speed vibration control system;
In the present invention because pure shear cut magneto-rheological vibration damper and energy regenerative mechanism are connected in series, therefore under the condition of given volume, piston rod is while bearing identical pressure, the transformation of energy that can realize energy regenerative mechanism maximizes, and effectively improves energy conversion efficiency;
3. the present invention is by piston rod and effective separation of resulting structure that produces controllable damping force, no longer need additionally to arrange compensation air bag in magneto-rheological vibration damper inside and carry out the internal differential pressure that compensating piston bar turnover magneto-rheological vibration damper cavity causes, thereby increased the movement travel of piston rod;
4. compare to the electromagnetic coil-piston structure of existing linear magneto-rheological vibration damper, in the present invention, electromagnetic coil is arranged at inner cylinder body inwall and shears between two between annulus, can more easily protect like this electromagnetic coil, can not cause due to the compression of piston, recovery motion the fatigue damage of electromagnetic coil or lead-in wire;
5. the present invention is arranged at annular permanent magnet the internal surface of electromagnetic coil or outer surface or alternative electromagnetic coil and realizes the inefficacy-Safety performance of magneto-rheological vibration damper, compare to traditional magneto-rheological vibration damper, input forward current or negative current are controlled to the damping force bidirectionally that can realize magneto-rheological vibration damper on electromagnetic coil, structure is more simple and reliable, owing to being subject to the adsorption force effect in magnetic field, magnetic flow liquid no longer causes precipitating on a large scale so that losing efficacy owing to being subject to the impact of gravity, this magneto-rheological vibration damper structure can solve the sedimentation problem of magnetic flow liquid in magneto-rheological vibration damper effectively,
6. the present invention is sealed in magnetic flow liquid in inner cylinder body, the magnetic flow liquid using still less, but but can provide better controllable damping mechanics performance/inefficacy-Safety performance and diamagnetic rheology liquid precipitate performance, the utilization efficiency of magnetic flow liquid is higher, the structure of this magneto-rheological vibration damper realize make magneto-rheological vibration damper and system cost lower.
Brief description of the drawings
Fig. 1 is the half active vibration/impulsive control system principle diagram based on magneto-rheological vibration damper;
Fig. 2 A is structural representation of the present invention;
Fig. 2 B is middle ball screw auxiliary structure A place zoomed-in view in the present invention;
Generator principle figure in energy regenerative mechanism in Fig. 2 C the present invention;
Fig. 3 A is generator windings equivalent circuit diagram in energy regenerative of the present invention mechanism;
Fig. 3 B is three phase generator 11 tube rectifying circuit figure in the present invention;
Fig. 4 is medium speed Fundamentals of Sensors schematic diagram of the present invention;
Fig. 5 is another mode of execution structural representation in the present invention;
Fig. 6 is another mode of execution structural representation in the present invention.
Number in the figure: 100 energy regenerative type self-sensing magneto-rheological vibration dampers, 101 outer cylinder bodies, 102 inner cylinder bodies, on 103, shear annulus, 104 shear disk, 105 electromagnetic coils, 106 closed flux circuits, 107 down cut annulus, 108 magnetic flow liquids, 109 rolling ball screw pair screw nuts, 110 leading screws, 111 guide rings, 112A upper end cap, 112B middle bracket, 113A the first rolling bearing, 113B the second rolling bearing, 113C the 3rd rolling bearing, 113D the 4th rolling bearing, 114 gears, 115A is S utmost point permanent magnet stator, 115B is N utmost point permanent magnet stator, 116 three-phase wound rotors, 116A is X phase winding rotor, 116B is Y phase winding rotor, 116C is Z phase winding rotor, 117 coupling, 118 lead outlet, 119 extensions, 120A first " O " RunddichtringO, 120B second " O " RunddichtringO, 121 top covers, 122A inner screw nut, 122B outboard nut, 127 ring shaped axial magnetic field permanent magnet bodies, 23 pure shear cut magneto-rheological vibration dampers, 66 speed probes, 78 energy regenerative mechanisms, 79 outside energy regenerative mechanisms, 232 gear bands.
Embodiment
Referring to Fig. 2 A, Fig. 2 B and Fig. 2 C, in the present embodiment, energy regenerative type self-sensing magneto-rheological vibration damper 100 comprises that pure shear cut magneto-rheological vibration damper 23, mechanical energy are converted to energy regenerative mechanism 78 and the speed probe 66 of electric energy.
As shown in Figure 2 A and 2 B, in the present embodiment, pure shear cut magneto-rheological vibration damper 23 comprises outer cylinder body 101, inner cylinder body 102 and ball screw pair, and described outer cylinder body 101 is coaxial setting with inner cylinder body 102; In described ball screw pair, at one end utilize inner screw nut 122A and outboard nut 122B to be fixed on the end cap center of circle of outer cylinder body 101 as the leading screw 110 of piston rod, and can compress and enter or restore and exit inner cylinder body 102, on the madial wall of described inner cylinder body 102, be provided with and described shearing disk 104 electromagnetic coil 105 one to one, and have respectively and be in neighbouring locational upper shearing annulus 103 and down cut annulus 107 with described electromagnetism electric coil 105; In described inner cylinder body 102, madial wall and ball-screw nut 109 by inner cylinder body 102 form enclosed cavity jointly, in described enclosed cavity, be filled with magnetic flow liquid 108, described ball-screw nut 109 is bearing on the upper end cap 112A of inner cylinder body 102 by the 4th rolling bearing 113D and the 3rd rolling bearing 113C with prolonged section in upper end, and sealed by top cover 121, be bearing on the middle bracket 112B of inner cylinder body 102 by the first rolling bearing 113A and the second rolling bearing 113B with prolonged section in lower end; Second " O " RunddichtringO 120B under upper end cap 112A between spin lead screw pair nut 109, and first " O " RunddichtringO 120A between middle bracket 112B is for realizing the sealing of magnetic flow liquid 108 at enclosed cavity; By described upper shearing annulus 103, down cut annulus 107, electromagnetic coil 105 between upper shearing annulus 103, down cut annulus 107, be in the shearing disk 104 on corresponding position with electromagnetic coil 105, and on corresponding position, the sidewall of inner cylinder body 102 forms the closed flux circuit of electromagnetic coil 105 jointly.When input current on electromagnetic coil 105, leading screw 110 compressions enter or restore while exiting inner cylinder body 102, rolling ball screw pair screw nut 109 drives shearing disk 104 to rotate, shearing disk 104 does relative movement and shears magnetic flow liquid 108 with upper shearing annulus 103, down cut annulus 107, thereby realize pure shear cut magneto-rheological vibration damper 23, damping force is inputted continuously controlled by electric current.The electromagnetic coil 105 of pure shear cut magneto-rheological vibration damper 23 goes between, speed probe 66 goes between and energy regenerative mechanism 78 goes between all draws from lead outlet 118.
As shown in Fig. 2 A and Fig. 2 C, in the present embodiment, energy regenerative mechanism 78 is positioned at inner cylinder body bottom, to be formed by S utmost point permanent magnet stator 115A and the N utmost point permanent magnet stator 115B of three-phase wound rotor 116 and setting in pairs, described S utmost point permanent magnet stator 115A and N utmost point permanent magnet stator 115B are fixed on the madial wall of inner cylinder body 102, for the electric energy of more efficient storage conversion, be provided with supporting energy storage unit with energy regenerative mechanism 78.
In the present embodiment, speed probe 66 is as shown in Figure 2 A by forming with the gear 114 of the coaxial setting of piston rod and the permanent magnet being equipped with and hall device, for obtaining the point-to-point speed of piston rod.
In concrete enforcement, corresponding structure setting also comprises:
Electromagnetic coil 105 or ring shaped axial magnetic field permanent magnet body 127 are at least one group, at least one group of the closed loop flux circuit 106 that itself and shearing disk 104, upper shearing annulus 103, down cut annulus 107 and inner cylinder body 102 sidewalls form, the maximum group number of closed flux circuit 106 depends on the length of inner cylinder body 102 and outer cylinder body 101.
Shear disk 104, upper shearing annulus 103, down cut annulus 107 and the preferential selection of inner cylinder body 102 but be not limited to taking high magnetic conductive material as material, the preferential non-magnet materials such as stainless steel or aluminium of selecting of leading screw 110 and rolling ball screw pair screw nut 109.The rotatingshaft of described three-phase wound rotor 116 is set and the extension 119 of rolling ball screw pair screw nut 109 is to be connected by coupling 117, described gear 114 be positioned at three-phase wound rotor 116 above or below, speed probe 66 can be also photoelectric encoder, electromagnetic type encoder, become magnetic flux type sensor or capacitive tachometer transducer.As shown in Figure 4, in the time that speed probe 66 utilizes Hall transducer principle, form by being connected in the measuring head that the gear 114 of rolling ball screw pair screw nut 109 and permanent magnet and Hall element H form, in the time that gear 114 rotates, when each tooth top passes through measuring head, on Hall element H, will produce a corresponding hall electromotive force, after differential operational amplifier A amplifies, export pulse, pulse number in unit of measurement's time, just can obtain the rotational speed of rolling ball screw pair screw nut 109.The size that speed probe is measured rotating speed resolution is determined by gear 114 numbers of teeth.Follow-up sensor signal processing, Calibration Circuit realizes the rotating speed of gear 114 to the sensing output of piston rod point-to-point speed.
Speed probe 66 can also be that the electric power signal of utilizing follow-up signal acquisition cuicuit system to feed back according to energy regenerative mechanism 78 realizes tach signal extraction.
One end of leading screw 110 is connected and fixed on the upper end cap home position of outer cylinder body 101 by the mode of upper and lower nut locking, described outer cylinder body 101 utilizes guide ring 111 to contact with inner cylinder body 102 at the other end, and can slide along the outer side wall of described inner cylinder body 102, the motion guide using described outer cylinder body 101 as piston rod.
Spaced each shearing disk 104 is staggered one by one on the axial position along inner cylinder body 102 with spaced upper shearing annulus 103 and down cut annulus 107, and described shearing disk 104 is corresponding one by one on axial position with electromagnetism electricity circle 105.Between shearing disk 104 and upper shearing annulus 103, and the thickness of shearing the magnetic current and liquid flow 108 between disk 104 and down cut annulus 107 can be arranged on 0.5-3mm, it should be noted that, if many electromagnetic coils 105 and permanent magnet are set, the direction that the direction of winding of two adjacent electromagnetic coils and permanent magnet produce magnetic field should arrange and could form multiple closed flux circuits on the contrary, and electromagnetic coil 105, permanent magnet and shearing disk 105, upper shearing annulus 103, the thickness operated by rotary motion of down cut annulus 107 is at 5-15mm, so at utmost applying a magnetic field, shear disk and shear annulus.The attribute of magnetic flow liquid 108 will be controlled by the input current on electromagnetic coil 105, and the controllable damping force performance of pure shear cut magneto-rheological vibration damper 23 is by the magnetic flow liquid attribute for depending mainly on electromagnetic field control.
The present invention utilizes ball screw auxiliary structure that the straight line motion of piston rod is converted into and is rotatablely moved, thereby the dynamic antivibration that effectively reduces the null field viscous damping force of magneto-rheological vibration damper and improved magneto-rheological vibration damper compares scope, the application area of magneto-rheological vibration damper is further expanded, make it become possibility being applied to high speed impact control system; In addition, because being sealed in inner cylinder body 102 cavitys and being full of, magnetic flow liquid 108 shears gap between disk 104, upper shearing annulus 103 and down cut annulus 107, can improve like this electromagnetic energy utilization efficiency, needn't consider again to cause due to the problem of structure the loose leakage of electromagnetic energy, improve the utilization ratio of electromagnetic efficiency and the magnetic flow liquid 108 of magneto-rheological vibration damper, effectively reduced the cost of magneto-rheological vibration damper.Wherein, ball screw pair can be substituted by the switching mechanism of other straight line motions-rotatablely move, and does not limit to.
In the time that piston rod 110 compresses or restores, as shown in Figure 2 C, three-phase wound rotor, be that X phase winding rotor 116A, Y phase winding rotor 116B and Z phase winding rotor 116C rotate and cut the magnetic line of force being formed by S utmost point permanent magnet stator 115A and N utmost point permanent magnet stator 115B, thereby induct three phase circuit output.In concrete enforcement, energy regenerative mechanism 78 also can be set to be made up of permanent magnet rotor and staor winding; The group number of winding can be three groups, two groups even one group, is not limited to.
As shown in Figure 3A, in the time that the magnetic line of force of cutting permanent magnet stator generation is made in 116 rotations of three-phase wound rotor, on coiling group rotor 116, induced current can be used for driving magneto-rheological vibration damper, is stored to electric energy collecting circuit/install as magneto-rheological vibration damper and control system and even total system use, and induced voltage can be expressed as:
e
xn＝E
msin(ωt) (1a)
e
xn＝E
msin(ωt-120°) (1b)
e
xn＝E
msin(ωt-240°) (1c)
Because induced voltage is threephase AC, for convenience of follow-up electrical energy storage circuit/device, Fig. 3 B has provided 11 tube rectifying circuit schematic diagram, utilize the three-phase full-bridge controlled rectifier output voltage of inducting to carry out rectification, threephase AC is transformed into approximate three-phase dc electricity, is more conducive to the storage of electric energy.Rectified three-phase circuit is not limited to circuit shown in Fig. 3 B.
As shown in Figure 5, in concrete enforcement, also energy regenerative mechanism 79 can be arranged to inner cylinder body 102 outsides, utilize gear band 232 that the extension of rolling ball screw pair screw nut 109 117 and the generator amature in outside energy regenerative mechanism 79 are in transmission connection, this structural type further expands the piston rod movement stroke of magneto-rheological vibration damper, although taken space outerpace, for the external compensation air bag of passive damper, taken up room even less.
In concrete enforcement, as shown in Figure 6, electromagnetic coil 105 can be replaced by ring shaped axial magnetic field permanent magnet body 127, or electromagnetic coil 105 is arranged to interior ring surface or the outer ring surface of ring shaped axial magnetic field permanent magnet body 127.With this, inefficacy-Safety performance is integrated in pure shear cut magneto-rheological vibration damper 23.Because magneto-rheological vibration damper is when the null field, while thering is no the function of current, its Passive damping force is very little, for magnetorheological half active vibration/impulsive control system, if control system lost efficacy or power cut-off, half active vibration/impulsive control system will lose its predefined control effect, and what situation was serious even can cause using magnetorheological half active control system to carry out structural failure and the casualties of the whole system of vibration/shock control.It should be noted that, ring shaped axial magnetic field permanent magnet body 127 is not limited to the outside that is arranged on the electromagnetic coil 105 between shearing annulus 103 and down cut annulus 107, can also be arranged at inner side or the alternative electromagnetic coil 105 of electromagnetic coil 105, or other can realize the position of magneto-rheological vibration damper inefficacy-Safety performance.Inefficacy-Safety performance integrated, will realize the two-way controllable force of magneto-rheological vibration damper, effectively expand the application of magneto-rheological vibration damper.
The structure of the energy regenerative type self-sensing magneto-rheological vibration damper that the present embodiment forms has following advantage.
The one,, electric energy feedback performance and velocity pick-up performance integrated.For energy-intensive modern society, in applied environment, obtain energy if just can realize it by the structural design of performer itself, be himself energy supply on the one hand, realize on the other hand the energy supply of its whole system, there is great society and engineering significance, also further expanded the application of performer itself; Because half active vibration/impulsive control system must be equipped with feedback transducer, sensor is integrated into and on performer, realizes performer self-sensing, not only further improve the reliability of performer and system thereof, and abandon outer sensor, reduced system cost and installing space demand.
The 2nd,, controllable damping force performance obtains optimal processing.The key structure that piston rod and controllable damping force produce is decoupling zero, therefore its controllable damping force performance, comprise dynamic antivibration than and controllable damping force scope, can shear the number of turn of annulus group number, electromagnetic coil or joint number and realize by increase maximization and the optimal settings of damping force.
The 3rd,, electromagnetic coil-piston mode has been abandoned in the twin-rotor housing setting of inner cylinder body and outer cylinder body, thereby makes magneto-rheological vibration damper can utilize to greatest extent the length of cylinder body, has maximized the piston movement stroke of magneto-rheological vibration damper.
The 4th,, the function integrated technology of inefficacy-Safety performance is realized.Permanent magnet is set in or beyond electromagnetic coil or is substituted by it, make magneto-rheological vibration damper there is the bidirectional damper mechanics controllability that lost efficacy-safe condition is baseline, in the time of half active control system inefficacy or control system power failure, can, for system provides reliable mechanics demand, can not cause system crash situation.
The 5th,, in the time of inefficacy-safe condition, make up the precipitation defects of magnetic flow liquid from structural design angle.By the setting of permanent magnet, Main Function composition in magnetic flow liquid is attached on the closed flux circuit of permanent magnet generation, magnetic flow liquid no longer causes precipitating on a large scale so that losing efficacy owing to being subject to the impact of gravity.Moreover, the structure of the energy regenerative type self-sensing magneto-rheological vibration damper that the present invention forms is simpler with respect to traditional " linear magneto-rheological vibration damper+power supply+outer sensor " composite structure, utilize the end cap at magneto-rheological vibration damper two ends directly the interior outer cylinder body of magneto-rheological vibration damper to be sealed with fastening, these members and Placement, ensure the separate closely connection mutually again of the each part of magneto-rheological vibration damper, such reliable in structure, is applicable to batch production, and cost is lower.
Claims (10)
1. an energy regenerative type self-sensing magneto-rheological vibration damper, is characterized in that described magneto-rheological vibration damper includes pure shear cut magneto-rheological vibration damper (23), mechanical energy and be converted to energy regenerative mechanism (78) and the speed probe (66) of electric energy;
Described pure shear cut magneto-rheological vibration damper (23) comprises outer cylinder body (101), inner cylinder body (102) and ball screw pair, and described outer cylinder body (101) is coaxial setting with inner cylinder body (102); In described ball screw pair, at one end utilize inner screw nut (122A) and outboard nut (122B) to be fixed on the end cap center of circle of outer cylinder body (101) as the leading screw (110) of piston rod, and can compress and enter or restore and exit inner cylinder body (102), on the madial wall of described inner cylinder body (102), be provided with and described shearing disk (104) electromagnetic coil (105) one to one, and have respectively and be in neighbouring locational upper shearing annulus (103) and down cut annulus (107) with described electromagnetism electric coil (105); In described inner cylinder body (102), madial wall and ball-screw nut (109) by inner cylinder body (102) form enclosed cavity jointly, in described enclosed cavity, be filled with magnetic flow liquid (108), described ball-screw nut (109) is bearing on the upper end cap (112A) and middle bracket (112B) of described inner cylinder body (102) by bearing respectively with prolonged section at two ends, and shaft seal is set to realize the sealing of magnetic flow liquid (108) in described enclosed cavity; By described upper shearing annulus (103), down cut annulus (107), be positioned at electromagnetic coil (105) between upper shearing annulus (103), down cut annulus (107), be in the shearing disk (104) on corresponding position with electromagnetic coil (105), and on corresponding position, the sidewall of inner cylinder body (102) forms the closed flux circuit (106) of electromagnetic coil (105) jointly;
Described energy regenerative mechanism (78) is positioned at inner cylinder body bottom, by three-phase wound rotor (116) and the S utmost point permanent magnet stator (115A) arranging in pairs and N utmost point permanent magnet stator (115B) formation, described S utmost point permanent magnet stator (115A) and N utmost point permanent magnet stator (115B) are fixed on the madial wall of inner cylinder body (102), with the supporting energy storage unit that is provided with of described energy regenerative mechanism (78);
Described speed probe (66) is by forming with the gear (114) of the coaxial setting of piston rod and the permanent magnet being equipped with and hall device, for obtaining the point-to-point speed of piston rod.
2. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1, it is characterized in that: described electromagnetic coil (105) can be replaced by ring shaped axial magnetic field permanent magnet body (127), or electromagnetic coil (105) is arranged to interior ring surface or the outer ring surface of ring shaped axial magnetic field permanent magnet body (127).
3. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1 and 2, it is characterized in that: described electromagnetic coil (105) or ring shaped axial magnetic field permanent magnet body (127) are at least one group, at least one group of the closed loop flux circuit (106) that itself and described shearing disk (104), upper shearing annulus (103), down cut annulus (107) and inner cylinder body (102) sidewall form, the maximum group number of described closed flux circuit depends on the length of inner cylinder body (102) and outer cylinder body (101).
4. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1 and 2, is characterized in that: described shearing disk (104), upper shearing annulus (103), down cut annulus (107) and inner cylinder body (102) are taking high magnetic conductive material as material.
5. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1 and 2, it is characterized in that: the rotatingshaft of described three-phase wound rotor (116) is set and the extension (119) of rolling ball screw pair screw nut (109) is to be connected by coupling (117), described gear (114) be positioned at three-phase wound rotor (116) above or below.
6. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1, is characterized in that: described energy regenerative mechanism (78) also can be set to be made up of permanent magnet rotor and threephase stator winding.
7. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1, is characterized in that: speed probe (66) can be also photoelectric encoder, electromagnetic type encoder, change magnetic flux type sensor or capacitive tachometer transducer.
8. according to the energy regenerative type self-sensing magneto-rheological vibration damper described in claim 1 or 7, it is characterized in that: described speed probe (66) is to utilize follow-up signal acquisition cuicuit system, realize tach signal according to the electric power signal of described energy regenerative mechanism (78) feedback and extract.
9. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1 and 2, it is characterized in that: one end of described leading screw (110) is connected and fixed on the upper end cap home position of outer cylinder body (101) by the mode of upper and lower nut locking, described outer cylinder body (101) utilizes guide ring (111) to contact with inner cylinder body (102) at the other end, and can slide along the outer side wall of described inner cylinder body (102), the motion guide using described outer cylinder body (101) as piston rod.
10. energy regenerative type self-sensing magneto-rheological vibration damper according to claim 1 and 2, it is characterized in that: spaced each shearing disk (104) is staggered one by one on the axial position along inner cylinder body (102) with spaced upper shearing annulus (103) and down cut annulus (107), and described shearing disk (104) is corresponding one by one on axial position with electromagnetism electricity circle (105).
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