CN103291828B - Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber - Google Patents
Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber Download PDFInfo
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- CN103291828B CN103291828B CN201310116067.7A CN201310116067A CN103291828B CN 103291828 B CN103291828 B CN 103291828B CN 201310116067 A CN201310116067 A CN 201310116067A CN 103291828 B CN103291828 B CN 103291828B
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- mover
- end cap
- bump leveller
- axle
- stator sleeve
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Abstract
The object of the present invention is to provide asymmetric tooth pitch electromagnetic type semi active vibration absorber of can connecting, comprise bump leveller unit, described bump leveller unit comprises upper end cap, lower end cap, stator sleeve, stator sleeve is connected with lower end cap with upper end cap respectively thus forms framework, in framework, mover is installed, through mover axle in the middle of mover, mover axle upper end is positioned on upper end cap, mover axle lower end is positioned at lower end cap place, mover axle and mover interference fit, mover center outer surface arranges circular groove, in circular groove, field coil is installed, stator sleeve has hole, lead-in wire connects field coil and passes from hole.The present invention is directed to deficiency in the past, provide a kind of quality can vibrating different controlled device to realize the bump leveller of multiple bump leveller concatenation function.Employing can play the optimum facewidth ratio of the optimum performance of bump leveller, and electromagnetic force improves more than 1 times than electromagnetic type semi active vibration absorber in the past; With the addition of bump leveller fail safe measure.
Description
Technical field
What the present invention relates to is a kind of vibration damping equipment.
Background technique
Nuisance vibration not only affects life of equipment, goes back the measuring accuracy of lowering apparatus instrument, affects the normal work of operator simultaneously, and in order to suppress nuisance vibration, people have carried out large quantity research.In vibration control engineering field, the conventional vibration of dynamic vibration absorber to controlled device suppresses.The working principle of dynamic vibration absorber is an additional structure with quality and rigidity in controlled device, and being shaken by the controlled master of the vibration realizing of this additional structure is the transfer of vibrational energy, thus reaches the object of absorbing.For usually can being reduced to the dynamic vibration absorber of single-degree-of-freedom mass-spring system, when the natural frequency of bump leveller is consistent with target frequency, bump leveller resonates, and can shift the vibrational energy of controlled device to the full extent.
Passive dynamic vibration absorber is the mechanical structure that quality and stiffness parameters are fixed, and its natural frequency is unadjustable, thus can only control the vibration of single-frequency, and Applicable scope is very narrow.In order to carry out vibration control to the controlled device of variable parameter operation, occurred the semi active vibration absorber that a lot of natural frequency is adjustable, also referred to as self-tuning bump leveller, most of semi active vibration absorber changes its natural frequency by changing rigidity.The coil built-in semiactive vibration absorber with closed structure that Chinese patent CN102364156A and ZL201010209160.9 proposes is exactly a kind of such electromagnetic type semi active vibration absorber, its principle is exactly by regulating field coil electric current to change ELECTROMAGNETIC STIFFNESS, and then reaches the object regulating bump leveller natural frequency.But above-mentioned patent mainly contains 3 deficiencies: the first, because the mass ratio of bump leveller and controlled device only has when meeting a certain feature scope, shock attenuation result is just obvious.So this research with great majority other correlative studys the same, the controlled device of extra fine quality scope can only be applicable to, when the controlled master for different quality shake be time, need redesign manufacture bump leveller; Second, in electromagnetic type bump leveller " electromagnetic spring " power---the size of placement property and gear ring structure has much relations, its gear ring structure size of existing electromagnetic type bump leveller adopt be all 0.5 facewidth ratio, it is disadvantageous for studying through inventor the performance finding this facewidth comparison bump leveller; 3rd, lack actuator failures protective measure.
Summary of the invention
The object of the present invention is to provide a kind of natural frequency can carry out with field current consecutive variations, absorbing quality the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting that regulates by structures in series.
The object of the present invention is achieved like this:
The present invention can connect asymmetric tooth pitch electromagnetic type semi active vibration absorber, comprise bump leveller unit, described bump leveller unit comprises upper end cap, lower end cap, stator sleeve, stator sleeve is connected with lower end cap with upper end cap respectively thus forms framework, in framework, mover is installed, through mover axle in the middle of mover, mover axle upper end is positioned on upper end cap, mover axle lower end is positioned at lower end cap place, mover axle and mover interference fit, mover center outer surface arranges circular groove, in circular groove, field coil is installed, stator sleeve has hole, lead-in wire connects field coil and passes from hole.
The present invention can also comprise:
1, the first mechanical spring is installed between mover and upper end cap, the second mechanical spring is installed between mover and lower end cap.
2, described mover axle is processed with keyway in the place coordinated with upper end cap, and upper end cap is processed with key in the place coordinated with mover axle, and keyway coordinates with key, makes mover axle can only end cap axial displacement relatively.
3, two or more bump leveller unit is comprised, mover axle upper end is the externally threaded projection of band, mover axle lower end is tapped groove, connects between bump leveller unit in the mode be arranged above and below, and is connected between adjacent two bump leveller unit by respective projection with groove.
4, described stator sleeve internal surface, mover outer surface are all processed with annular tooth ring, and the facewidth, the tooth pitch of gear ring are equal with the number of teeth.
The facewidth ratio of 5, described gear ring is 0.2.
6, there is air gap between described stator sleeve and mover.
7, upper end cap arranges brake hole.
Advantage of the present invention is: the present invention is directed to deficiency in the past, provides a kind of quality can vibrating different controlled device to realize the bump leveller of multiple bump leveller concatenation function.
(1) multiple this type bump leveller equally realizes connecting up and down with being rigidly connected respectively of mover axle by end cap, multiple bump levellers after series connection can be summarized as the bump leveller that has larger absorbing quality, thus absorbing quality can be changed, with the controlled device making it be applicable to various quality by the series connection number changing bump leveller.
(2) facewidth is than more reasonable, the impact of facewidth comparison bump leveller performance is very large, the facewidth of 0.2 reaches best than making the operational frequency bandwidth of bump leveller and the linearity of ELECTROMAGNETIC STIFFNESS, and the facewidth of conventional electromagnetic bump leveller is 0.5 than what adopt, and this is disadvantageous to the performance of bump leveller.
(3) upper end cap is processed with brake hole, when running into the out of contior situation of the bump levellers such as controlled device, for avoiding bump leveller to damage because of the hard hit of mover, uses stay bolt that mover is locked by brake hole.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is two bump leveller units in series structural representations;
Fig. 3 is bump leveller braking principle figure;
Fig. 4 is facewidth comparison bump leveller performance impact figure.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 4, the present invention includes mover 6, stator sleeve 8, field coil 7, mover axle 2, upper end cap 4, lower end cap 10, mechanical spring 5, shaft-cup 1, braking port lid 3, the parts such as linear bearing 9.Stator sleeve 8, upper end cap 4, lower end cap 10 constitute the standing part of bump leveller.Field coil 7 is arranged in the grooving of mover 6, and mover 6 is fixedly mounted on mover axle 2, constitutes the motion parts of bump leveller.The mechanical spring 5 of mover top and the bottom is enclosed within mover axle 2, and one end is placed in the groove of mover upper and lower surface, and the other end is against upper and lower end and covers.The Main Function of mechanical spring 5 positions mover, two mechanical spring rigidity are identical, length is different, by the deadweight of making a concerted effort to offset absorbing quality that its reduction length difference produces, realize mover gear ring and stator ring is in just to position when original state, during installation, alignment error adjusts by plus-minus pad.
Mover 6 of the present invention central outer wall processing circular groove, field coil 7 is arranged in circular groove, mover axle 2 and mover 6 interference fit, two mechanical springs 5 are arranged between end cap and mover 6 for carrying out supporting and location to mover 6, upper and lower end cap 4,10 is arranged on stator sleeve about 8 two ends, and mover 6 opposite end cover rim axially moves up and down.Mover axle 2 upper end is processed with the externally threaded projection of band, and mover axle lower end is processed with tapped groove, and protruding and groove closely cooperates by screw thread.The place that mover axle 2 is coordinating with upper end cap 4 is processed with keyway, and the place that upper end cap 4 is coordinating with mover axle 2 is processed with key, makes mover axle 2 can only end cap axial displacement relatively.Stator sleeve 8 internal surface, mover 6 outer surface are all processed with annular tooth ring, and the facewidth, the tooth pitch of gear ring are equal with the number of teeth.The facewidth ratio of the gear ring ratio of tooth pitch (facewidth with) is 0.2.Slight air gap is there is between stator sleeve 8 and mover 6.Upper end cap 4 is processed with brake hole 3.
Mover axle 2 upper end is processed with the externally threaded projection of band, and mover axle 2 lower end is processed with tapped groove.Protruding and groove closely cooperates by screw thread, and the mover axle that can realize two identical bump levellers of the present invention is fixedly connected with.Upper and lower end cap surrounding is processed with the size screw identical with position, and the stator sleeve that can realize two identical bump levellers of the present invention is fixedly connected with, and the series connection figure of two bump levellers as shown in Figure 2.
The material selection soft magnetic material electrical pure iron of stator sleeve 13 and mover 10, that mover axle 6 adopts is 40Cr, and through heat treatment to make it have good surface hardness, that other parts adopt is aluminum alloy Ly14.What winding wire 11 adopted is enamel insulated round copper wire, and nominal diameter is 1mm, and the maximum safe current that passes into is 2.75A, and the maximum operating currenbt of the present invention's design is 2.5A, within the scope of maximum safe current, can ensure that the present invention can run long-term security.
Stator sleeve 8, stator ring, air gap, mover gear ring and mover 6 form closed magnetic path, after field coil 7 passes into direct current, in closed magnetic path, form magnetic field.When mover 6 does not have relative displacement with stator sleeve 8, mover gear ring and stator ring are for just to position, and between cog only exists the electromagnetic attraction perpendicular to flank of tooth direction.After mover 6 and stator sleeve 8 produce axial displacement, dynamic, the little between cog air-gap field of stator offsets thereupon, creates axial electromagnetism restoring force.Within the scope of certain axial displacement, this restoring force and axial displacement linear, the ratio of restoring force and displacement and ELECTROMAGNETIC STIFFNESS, the effective travel of this axial displacement scope and mover, with the facewidth of little tooth than relevant.
When passing into the current value change of field coil 7, magnetic circuit internal magnetic field also changes, and ELECTROMAGNETIC STIFFNESS changes thereupon.
The global stiffness of bump leveller is ELECTROMAGNETIC STIFFNESS and mechanical spring rigidity sum, and when not passing into electric current, the rigidity of bump leveller is mechanical spring rigidity, the minimum natural frequency of corresponding is bump leveller; When passing into 2.5A, the rigidity of bump leveller is ELECTROMAGNETIC STIFFNESS and spring rate summation, the maximum natural frequency of corresponding is bump leveller.Calculated by simulation software and test, the natural frequency that within the scope of 0 ~ 2.5A, each current value is corresponding can be measured.During work, natural frequency of the present invention can be changed by regulating current value, thus tracking controlled object frequency carries out absorbing.
When single bump leveller work, it is be fixedly connected with that bump leveller is shaken with controlled master by the screw of lower end cap surrounding, and use shaft-cup to be sealed by bump leveller upper end cap with braking port lid, the lead-in wire stretched out by fairlead connects extraneous power supply and control system, carry out work, as shown in Figure 1.
When two identical bump leveller series operations of the present invention, the lower end cap of upper bump leveller is fixedly connected with by the screw of end cap surrounding with the upper end cap of lower bump leveller, the mover axle lower end of upper bump leveller is fixedly connected with the screw thread of groove by projection with the mover axle upper end of lower bump leveller, the lead-in wire of upper and lower bump leveller becomes a lead-in wire by connecting, thus makes two bump levellers be connected into new " a large bump leveller ".The rest may be inferred, and the series connection of n bump leveller can be made to become new " a large bump leveller ".Because the axial electromagnetic force after the series connection of n bump leveller and absorbing quality increase n doubly simultaneously, so " large bump leveller " natural frequency corresponding under same electric current with single bump leveller of the present invention is identical.It should be noted that, the projection of upper and lower bump leveller and groove screw-thread fit are also loose, need be energized after making electromagnetic spring work and just connect during series connection, can play the effect that fixed lobe and groove do not rotate in respective little bump leveller like this.
The absorbing quality of single bump leveller of the present invention is m
a, after n bump leveller series connection of the present invention becomes one " large bump leveller ", then the absorbing quality of being somebody's turn to do " large bump leveller " is nm
a.If it be quality is m that controlled master shakes
z, according to vibration control theory, work as mass ratio
time, shock attenuation result is just obvious, and consider the factor of cost and practical application in addition, mass ratio μ can not be excessive, generally gets 0.1≤μ≤0.3.In actual applications, can to shake the quality being according to controlled master, calculate the bump leveller number n needing series connection, thus " large bump leveller " after series connection is met the requirements on mass ratio.
Upper end cap 4 is processed with brake hole, and diameter is M10, when bump leveller operation irregularity, the stay bolt of M1O can be used to carry out locked braking by brake hole to mover, prevents the upper and lower end cap of the abnormal shock of mover from causing damage.
Air gap between mover gear ring and stator sleeve gear ring is very little, so process grooving in upper and lower end cap outer rim and stator sleeve contacting point, for positioning stator sleeve, avoids it that radial minor shifts occurs and mover gear ring rubs.
The end of field coil 7 wire adopts installs flexible cord, and the high frequency that can adapt to mover moves repeatedly.
Claims (3)
1. can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber, it is characterized in that: comprise bump leveller unit, described bump leveller unit comprises upper end cap, lower end cap, stator sleeve, stator sleeve is connected with lower end cap with upper end cap respectively thus forms framework, in framework, mover is installed, through mover axle in the middle of mover, mover axle upper end is positioned on upper end cap, mover axle lower end is positioned at lower end cap place, mover axle and mover interference fit, mover center outer surface arranges circular groove, in circular groove, field coil is installed, stator sleeve has hole, lead-in wire connects field coil and passes from hole,
First mechanical spring is installed between mover and upper end cap, the second mechanical spring is installed between mover and lower end cap;
Described mover axle is processed with keyway in the place coordinated with upper end cap, and upper end cap is processed with key in the place coordinated with mover axle, and keyway coordinates with key, makes mover axle can only end cap axial displacement relatively;
Described bump leveller unit has two or more, mover axle upper end is the externally threaded projection of band, mover axle lower end is tapped groove, connects between bump leveller unit in the mode be arranged above and below, and is connected between adjacent two bump leveller unit by respective projection with groove;
Described stator sleeve internal surface, mover outer surface are all processed with annular tooth ring, and the facewidth, the tooth pitch of gear ring are equal with the number of teeth;
The facewidth ratio of described gear ring is 0.2.
2. asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 1, is characterized in that: there is air gap between described stator sleeve and mover.
3. asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 2, is characterized in that: upper end cap arranges brake hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116067.7A CN103291828B (en) | 2013-04-03 | 2013-04-03 | Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116067.7A CN103291828B (en) | 2013-04-03 | 2013-04-03 | Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291828A CN103291828A (en) | 2013-09-11 |
| CN103291828B true CN103291828B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310116067.7A Expired - Fee Related CN103291828B (en) | 2013-04-03 | 2013-04-03 | Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295651B (en) * | 2014-10-20 | 2016-05-04 | 哈尔滨工程大学 | A kind of damp type mixed type dynamic vibration absorber that becomes |
| CN105317912B (en) * | 2015-11-13 | 2017-10-03 | 哈尔滨工程大学 | Broadband rigidity and damp adjustable semi active vibration absorber |
| CN105909713B (en) * | 2016-05-12 | 2018-08-17 | 哈尔滨工程大学 | A kind of high linearity electromagnetic type semi active vibration absorber |
| CN107339352B (en) * | 2017-08-21 | 2019-08-06 | 哈尔滨工程大学 | A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller |
| CN107701652A (en) * | 2017-11-07 | 2018-02-16 | 西安交通大学 | One kind series connection expanded type inertia actuator and its start method |
| CN111022548A (en) * | 2019-12-31 | 2020-04-17 | 中科振声（苏州）电子科技有限公司 | Modular vibration absorber, vibration absorber module and machine tool |
| CN112253681B (en) * | 2020-09-22 | 2022-03-29 | 江苏科技大学 | Tension-compression type energy-absorbing buffering device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5226578B2 (en) * | 1974-02-08 | 1977-07-14 | ||
| US6006875A (en) * | 1998-03-31 | 1999-12-28 | Motran Industries Inc | Electrically-tunable vibration absorbers |
| JP2006187079A (en) * | 2004-12-27 | 2006-07-13 | Hitachi Ltd | Cylindrical linear motor, electromagnetic suspension and vehicle employing it |
| CN102410336B (en) * | 2011-11-07 | 2014-06-11 | 哈尔滨工程大学 | Coil external type semiactive vibration absorber in enclosed structure |
| CN102364156A (en) * | 2011-11-07 | 2012-02-29 | 哈尔滨工程大学 | Coil built-in semiactive vibration absorber with closed structure |
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