CN202040270U - Cantilever type semi-active vibration absorber - Google Patents
Cantilever type semi-active vibration absorber Download PDFInfo
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- CN202040270U CN202040270U CN2011200616405U CN201120061640U CN202040270U CN 202040270 U CN202040270 U CN 202040270U CN 2011200616405 U CN2011200616405 U CN 2011200616405U CN 201120061640 U CN201120061640 U CN 201120061640U CN 202040270 U CN202040270 U CN 202040270U
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- China
- Prior art keywords
- square chest
- overhang
- electromagnet
- vibration absorber
- dovetail groove
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Abstract
The utility model provides a cantilever type semi-active vibration absorber, comprising a cantilever beam, a square box, DC motors, a transmission gear, an electromagnet composed by an iron core and a coil, and an active controller. A dovetail groove is disposed on the cantilever beam, and two side edges of the cantilever beam are respectively provided with a gear rack. A trapezoid-shaped block matching with the dovetail groove is disposed below the square box. Two DC motors are disposed at two sides of the square box. The transmission gear disposed on the DC motor is engaged with the gear rack. The electromagnet is disposed in the square box. The active controller controls the DC motors and the electromagnet. With high vibration resistance and reliability, the semi-active vibration absorber only needs a single mount point without unused beam length.
Description
Technical field
The utility model relates to a kind of bump leveller, particularly a kind of cantilever type semi active vibration absorber.
Background technique
In vibration control engineering field, the passive type dynamic vibration absorber is usually used in controlling specific single-frequency vibration.When the frequency of external excitation changes, the passive type dynamic vibration absorber will not have the effect of characteristic frequency vibration control, if the change by rigidity or quality makes the natural frequency of bump leveller change along with the variation of external excitation frequency, the absorbing frequency range of bump leveller will be widened.The dynamic vibration absorber of this variable self frequency often is called as semi active vibration absorber or self-tuning bump leveller.
Generally speaking, semi active vibration absorber change ratio of rigidity change quality realizes easily.The method that changes rigidity at present often has electromagnetic type, electrolyte type and mechanical type.In the electromagnetic type semi active vibration absorber, typically have by changing electric current and change ELECTROMAGNETIC STIFFNESS ([1] Zhang Hongtian, Lee plays deep and remote, Liu Zhigang etc. initiatively absorbing technical research [J] of electrodynamic type. the vibration engineering journal, 2001,14 (1): 113-117), change form such as space change ELECTROMAGNETIC STIFFNESS ([2] Qian Xiaoyong, Hu Haiyan. the semi active vibration absorber of adjustable clearance and realization thereof [J]. the vibration engineering journal, 2001,14 (4): 378-382); Electrolyte type by electrorheological fluid or magnetic flow liquid realize rigidity change ([3] Xu Zhenbang. self-tuning absorbing technical research [D]. Hefei: China Science ﹠ Technology University, 2010; [4] Wang Lianhua, Gong Xinglong, Ni Zhengchao, Xu Zhenbang opens the gill, Chen Haibo etc. a plurality of magnetic rheology elastic body self-tuning formula bump levellers jointly control research [J]. experimental mechanics, 2008,23 (2): 97-102).Change active spring coils numerical expression ([5] Xu Zhenbang that mechanical type is common, Gong Xinglong, Chen Xianmin etc. mechanical type frequency adjustable dynamic vibration absorber and damping behavior thereof [J]. vibration and impact, 2010,29 (2): 1-6), crooked leaf spring type ([6] Sun Jianmin, Chen Yuqiang. a kind of active Tuned Absorber Design of Internal Combustion Engine [J]. Heilongjiang Institute of Technology's journal, 2001,15 (2): 45-47), the parallel-plate slide block type, air spring type ([7] Jin Xiaoxiong, Xiao Yong, Lin Yuhui, Zhu Na etc. the research [J] of pneumatic spring semi-active type dynamic vibration absorber. the China Construction Machinery journal, 2007,5 (3): 253-257).
Advantage simple in structure, that the linearity is good that the beam type semi active vibration absorber has.The people's design and ([8] Hao Zhiyong that in gasoline engine vibration control, achieve success such as brave by China Hao Zhi the earliest, Shu Gequn, Shu Gequn. the research [J] of gasoline engine vibration driving type active vibration absorber. Study on Design Calculation, 1999 (4): 9-10), this semi active vibration absorber is with absorbing quality and drive motor separate design, drive motor also is a quality of overhang, this design not only contains the main frequency that mass block forms, and also contains the interfering frequency that the drive motor quality forms.1999, the dunnage on the leading screw passed through of Nagaya design moves and changes cantilever effective length ([9] Nagaya K, Kurusu A, Ikai S, et al.Vibration Control of a structure by using a tunable absorber and an optimal vibration absorber under auto-tuning control[J] .Journal of Sound and Vibration, 1999,228 (4): 773-792).Carneal with drive motor directly as the oscillating mass piece, make compact more ([10] the Carneal J P of structure like this, Charette F, Fuller CR.Minimization of sound radiation from plates using adaptive tunedvibration absorbers[J] .Journal of Sound and Vibration, 2004,270 (4-5): 781-792).Crossbeam in above-mentioned three kinds of beam type semi active vibration absorbers all is that two ends are fixed, and mass block is in the structure of centre, and the driving of mass block is all finished by leading screw.This structure needs two mounting points; The effective length of overhang has only half of beam length, has caused the idle of space; Require the machining accuracy height of leading screw, when bump leveller played a role, leading screw also vibrated with resonant frequency, and quick abrasion has reduced the reliability of shock-absorbing means.
Summary of the invention
The purpose of this utility model is to provide a kind of cantilever type semi active vibration absorber that only needs single mounting points, do not have idle beam length, has high vibration resistance and reliability.
The purpose of this utility model is achieved in that
The electromagnet and the active controller that comprise overhang, square chest, direct current generator, driving gear, constitute by iron core and coil, be with dovetail groove on the overhang, two sides of overhang have tooth bar, the bottom of square chest have with overhang on the trapezoid block that is complementary of dovetail groove, two direct current generators are installed in the square chest both sides, the driving cog wheel and rack that is installed on the direct current arbor is meshed, the electromagnet that is made of iron core and coil places square chest, active controller control direct current generator and electromagnet.
Described square chest is made up of the square chest base and the square chest upper end cap that fuse with trapezoid block.
Tooth bar on two sides of overhang is directly to process on two sides of overhang.Also can be that two toothed rack are separately fixed on two sides of overhang.
Structure of the present utility model mainly comprises the square chest of the overhang of band dovetail groove and side tooth bar, two direct current generators and driving gear, band trapezoid block, electromagnet that iron-core coil constitutes and active controller etc.Wherein an end of overhang is fixed in the positions such as machine angle for the treatment of the vibration damping machine by modes such as bolts, and the trapezoid block of opening the dovetail groove of certain-length and square chest from the other end cooperates, as the sliding rail of square chest and group of motors zoarium.The effect of square chest mainly is as the adjustable mass elements of bump leveller and the mountion plate of motor.The end injection that square chest is opened by the overhang dovetail groove is made up with overhang.Two direct current generators are fixed in the square chest both sides, and motor output shaft is vertical with plane, overhang place, the spline-simulating profile engagement that gear of installing on the axle and overhang side process.Bilateral transmission simultaneously, the stability that helps moving.Square chest is made up of shell and internal electrical magnet: shell can dismounting, and coil the two poles of the earth of internal electrical magnet are connected to the square chest outside, the command control that the on off operating mode of electric current is sent by controller.
The main feature of each several part is embodied in:
The effect of overhang guide rail is to support mass elements, the tooth bar transmission is provided, the dove-tail form groove of opening plays the fixed mass element simultaneously and the effect of sliding rail is provided, its topmost meaning is the stiffness elements as bump leveller, the diverse location of fit quality element on overhang can provide different stiffness characteristics.The fixed end of overhang is according to the experience of debug class like bump leveller, be designed to arc profile, nut external diameter with design screw thread model correspondence around the screw is that diameter mills out shallow slot (counterbore), these designs help to optimize the fixed effect of overhang, reduce the negative influence of transmission way to the shock attenuation result of mounting points.
Motor adopts bilateral to arrange, makes that total is stressed evenly, square chest slides smooth and easy.The command control that motor is sent by active controller.The instruction of two motor receptions is synchronizing signal.
The effect of electromagnet is to open electromagnet and produce magnetic field when once regulating control when finishing, and produces bigger magnetic attraction between square chest and the overhang fitting surface, plays the fixedly effect of square chest position.
The effect of active controller is to send motor control signal according to the error signal that the control law of the relation of the natural frequency of overhang bump leveller and mass elements position decision and error path sensor pick up, and the break-make of control electromagnet current is to cooperate the motion state of motor.Active controller can be designed to the real time comprehensive controller based on the multichannel error identification of whole vibrating isolation system and the output of multichannel control signal, also can be designed to the built-in controller of each bump leveller special use.
The fitting surface of dovetail groove and trapezoid block requires certain processing plane degree, guarantees the smooth and easy of effect that magnetic force is fixing and slip.Possibly can't go up oil lubrication in the chute, influence the bump leveller natural frequency in order to avoid introduce oil film rigidity.In addition because dovetail groove belongs to open structural type, lubricant oil has and overflows or be penetrated into possibility on the overhang working surface, perhaps can influence the fixed effect of electromagnet.The mating area of overhang and square chest milled out shallow slot before opening dovetail groove, in order to the lateral shift of restriction square chest.
Compare with existing beam type semi active vibration absorber, advantage of the present utility model is mainly reflected in:
1, the utility model only needs a mounting points, is beneficial to engineering construction more.
2, the length of the whole beam of the utility model all is effective lengths of adjustable rigidity, does not have idle length, has widened the absorbing frequency band.
3, the utility model adopts the rack drives oscillating mass, and not only the comparable leading screw of machining accuracy is low, has reduced cost, and the low required precision of tooth bar has also improved the vibration resistance and the reliability of whole device.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of square chest;
Fig. 3 is the structural representation of tooth bar.
Embodiment
For example the utility model is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1-Fig. 3.Electromagnet 5 and active controller 9 that cantilever type semi active vibration absorber of the present utility model comprises overhang 10, square chest 2, direct current generator 6, driving gear 8, is made of iron core and coil, be with dovetail groove on the overhang, two sides of overhang have tooth bar 1, the bottom of square chest have with overhang on the trapezoid block that is complementary of dovetail groove, two direct current generators are installed in the square chest both sides, the driving cog wheel and rack that is installed on the direct current arbor 7 is meshed, the electromagnet that is made of iron core and coil places square chest, active controller control direct current generator and electromagnet.Square chest is made up of the square chest base 3 and the square chest upper end cap 4 that fuse with trapezoid block.
Above-mentioned constituent element combination back constitutes overhang slide rail, mass elements, driving transmitting assemblies, electromagnetic clutch device and active controller.Wherein overhang slide rail one end is as bolted fixed position, and the other end is opened dovetail groove, and its length is by the frequency-tuning range decision of design.The both sides of beam are processed as the tooth bar form, and length can be with reference to the length of dovetail groove.There are two fitting surfaces, the one, bolt hole place, the one, the sweeping area of mass block and overhang contact surface on the beam.These two cooperate facing cut to become shallow slot to be used to improve the stability of fitting surface.Mass elements is a square chest, has end cap to open and to seal, and inside has cavity to be used to hold electromagnetic clutch device.The porose wire arrangements that is used for electromagnetic clutch device of end cap.Trapezoidal beam texture is arranged at the square chest bottom, is used for the cooperation with the dovetail groove of opening on the overhang.Any installation or hang are born main pressure by trapezoid block with the different fitting surfaces of dovetail groove, with the protection gear pair.The square chest both sides are dc stepper motor fixedly.Motor output shaft points to the side that ladder beam is arranged, and axle head is equipped with gear, meshes respectively with the tooth bar of overhang both sides.Two motors are accepted synchronizing signal.Electromagnetic clutch device is the electromagnet that is made of iron core and coil, and the break-make of its electric current is by the drive condition decision of motor, the SC sigmal control that sent by active controller.
During installation the electromagnet coil winding put into the mass elements internal cavity and carry out fixingly, guarantee that lead extends to the outside and seals the square chest end cap.At two dc stepper motors of square chest both sides fixed installation, guarantee that the direction of output shaft is pointed to ladder beam one side.Gear is installed to motor output shaft end (key), the quality structure that assembles is embedded on the overhang, trapezoid block is aimed at dovetail groove, the both sides gear is aimed at the both sides tooth bar, manually transmission and fitting surface is assembled the bolt that the back that finishes is connected control circuit and dovetail groove end stop piece and fixed end are installed.
During work by active controller according to the control algorithm of setting, control signal is handled and exported to the error path signal that picks up, make electromagnetic clutch device be in the state of getting loose, control motor driving mass elements moves in slide rail, search for or directly realize the best operating point of appointment, control the position of electromagnetic clutch device lock mass element at last.The operating condition of motor is a precondition with the state of getting loose of clutch, and the locking states of clutch is a precondition with the holding state of motor.Consider above-mentioned logical constraint in the design of control loop, to avoid the contradiction of mechanical motion.
Claims (2)
1. cantilever type semi active vibration absorber, the electromagnet and the active controller that comprise overhang, square chest, direct current generator, driving gear, constitute by iron core and coil, it is characterized in that: be with dovetail groove on the overhang, two sides of overhang have tooth bar, the bottom of square chest have with overhang on the trapezoid block that is complementary of dovetail groove, two direct current generators are installed in the square chest both sides, the driving cog wheel and rack that is installed on the direct current arbor is meshed, the electromagnet that is made of iron core and coil places square chest, active controller control direct current generator and electromagnet.
2. a kind of cantilever type semi active vibration absorber according to claim 1 is characterized in that: described square chest is made up of the square chest base and the square chest upper end cap that fuse with trapezoid block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200616405U CN202040270U (en) | 2011-03-10 | 2011-03-10 | Cantilever type semi-active vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200616405U CN202040270U (en) | 2011-03-10 | 2011-03-10 | Cantilever type semi-active vibration absorber |
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| CN202040270U true CN202040270U (en) | 2011-11-16 |
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| CN2011200616405U Expired - Fee Related CN202040270U (en) | 2011-03-10 | 2011-03-10 | Cantilever type semi-active vibration absorber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116357A (en) * | 2011-03-10 | 2011-07-06 | 哈尔滨工程大学 | Cantilever type semi-active vibration absorber |
| CN103629294A (en) * | 2013-12-05 | 2014-03-12 | 哈尔滨工程大学 | Simply supported beam type dynamic vibration absorber with adjustable frequency |
| CN104806693A (en) * | 2015-04-30 | 2015-07-29 | 上海交通大学 | Intelligent self-adaptive vibration absorber, array integrating device and application of intelligent self-adaptive vibration absorber |
-
2011
- 2011-03-10 CN CN2011200616405U patent/CN202040270U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116357A (en) * | 2011-03-10 | 2011-07-06 | 哈尔滨工程大学 | Cantilever type semi-active vibration absorber |
| CN103629294A (en) * | 2013-12-05 | 2014-03-12 | 哈尔滨工程大学 | Simply supported beam type dynamic vibration absorber with adjustable frequency |
| CN104806693A (en) * | 2015-04-30 | 2015-07-29 | 上海交通大学 | Intelligent self-adaptive vibration absorber, array integrating device and application of intelligent self-adaptive vibration absorber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20140310 |