CN103291828A - Serially-connected electromagnetic semi-active vibration absorber with asymmetrical tooth pitches - Google Patents
Serially-connected electromagnetic semi-active vibration absorber with asymmetrical tooth pitches Download PDFInfo
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- CN103291828A CN103291828A CN2013101160677A CN201310116067A CN103291828A CN 103291828 A CN103291828 A CN 103291828A CN 2013101160677 A CN2013101160677 A CN 2013101160677A CN 201310116067 A CN201310116067 A CN 201310116067A CN 103291828 A CN103291828 A CN 103291828A
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- mover
- vibration absorber
- end cap
- active vibration
- bump leveller
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Abstract
The invention aims to provide a serially-connected electromagnetic semi-active vibration absorber with asymmetrical tooth pitches. The serially-connected electromagnetic semi-active vibration absorber comprises vibration absorber units, wherein each vibration absorber unit comprises an upper end cover, a lower end cover and stator sleeves; the stator sleeves are respectively connected with the upper end cover and the lower end cover, so as to form a frame; a rotor is mounted in the frame; a rotor shaft penetrates through the middle part of the rotor, the upper end of the rotor shaft is positioned above the upper end cover, and the lower end of the rotor shaft is positioned at the lower end cover, and the rotor shaft is in interference fit with the rotor; annular grooves are formed in the outer surface of the middle part of the rotor, and excitation coils are mounted in the annular grooves; and holes are formed in the stator sleeves, and leading wires are connected with the excitation coils, and penetrate out of the holes. Aiming at the defects in the prior art, the invention provides the vibration absorber which can vibrate controlled objects with different qualities so as to realize the function of series connection of a plurality of vibration absorbers, optimal tooth width ratio, which enables optimum performance of the vibration absorber to be exerted, is adopted, electromagnetic force is improved by more than one time than that of a conventional electromagnetic semi-active vibration absorber, and protection measures for failure of the vibration absorber are added.
Description
Technical field
What the present invention relates to is a kind of vibration damping equipment.
Background technique
Nuisance vibration not only influences life of equipment, goes back the measuring accuracy of lowering apparatus instrument, influences operator's proper functioning simultaneously, and in order to suppress nuisance vibration, people have carried out big quantity research.In vibration control engineering field, dynamic vibration absorber commonly used suppresses the vibration of controlled device.The working principle of dynamic vibration absorber is that shaking by the controlled master of the vibration realizing of this additional structure is the transfer of vibrational energy, thereby reaches the purpose of absorbing in the additional structure with quality and rigidity of controlled device.For the dynamic vibration absorber that can be reduced to the single-degree-of-freedom mass-spring system usually, when the natural frequency of bump leveller was consistent with target frequency, bump leveller resonated, and can shift the vibrational energy of controlled device to the full extent.
Passive dynamic vibration absorber is quality and the fixing mechanical structure of stiffness parameters, and its natural frequency is unadjustable, thereby can only control the vibration of single-frequency, and Applicable scope is very narrow.Carry out vibration control for the controlled device to variable parameter operation, the semi active vibration absorber of a lot of adjustable natural occurred, be also referred to as the self-tuning bump leveller, most of semi active vibration absorber changes its natural frequency by changing rigidity.The built-in semi active vibration absorber of enclosed construction coil that Chinese patent CN102364156A and ZL201010209160.9 propose is exactly a kind of such electromagnetic type semi active vibration absorber, its principle is exactly to change ELECTROMAGNETIC STIFFNESS by regulating the field coil electric current, and then reaches the purpose of regulating the bump leveller natural frequency.But above-mentioned patent mainly contains 3 deficiencies: the first, because the mass ratio of bump leveller and controlled device has only when satisfying a certain characteristics scope, shock attenuation result is just obvious.So should research the same with other correlative studys of great majority, can only be applicable to the controlled device of extra fine quality scope, when the controlled master at different quality shakes when being, need redesign manufacturing bump leveller; Second, the power of " electromagnetic spring " in the electromagnetic type bump leveller---the size of placement property and gear ring structure has much relations, its gear ring structure size of existing electromagnetic type bump leveller adopts all is 0.5 facewidth ratio, discovers that through the inventor performance performance of this facewidth comparison bump leveller is disadvantageous; The 3rd, lack the actuator failures protective measure.
Summary of the invention
The asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting that the object of the present invention is to provide that a kind of natural frequency can change continuously with field current, the absorbing quality can be regulated by the structure series connection.
The object of the present invention is achieved like this:
The present invention's asymmetric tooth pitch electromagnetic type semi active vibration absorber of can connecting, comprise the bump leveller unit, described bump leveller unit comprises upper end cap, lower end cap, stator sleeve, thereby stator sleeve links to each other with lower end cap with upper end cap respectively and constitutes framework, mover is installed in the framework, pass the mover axle in the middle of the mover, mover axle upper end is positioned on the upper end cap, mover axle lower end is positioned at the lower end cap place, mover axle and mover interference fit, mover middle part outer surface arranges circular groove, and field coil is installed in the circular groove, have the hole on the stator sleeve, lead-in wire connects field coil and passes from the hole.
The present invention can also comprise:
1, first mechanical spring is installed between mover and the upper end cap, second mechanical spring is installed between mover and the lower end cap.
2, be processed with keyway in the place that cooperates with upper end cap on the described mover axle, be processed with key in the place that cooperates with the mover axle on the upper end cap, keyway cooperates with key, makes the end cap axial displacement relatively of mover axle.
3, comprise two or more bump levellers unit, mover axle upper end is for being with externally threaded projection, mover axle lower end is tapped groove, connects in the mode of arranging up and down between the bump leveller unit, and the projection of passing through separately between adjacent two bump leveller unit links to each other with groove.
4, described stator sleeve internal surface, mover outer surface all are processed with annular tooth ring, and the facewidth of gear ring, tooth pitch and the number of teeth equate.
5, the facewidth of described gear ring ratio is 0.2.
6, there is air gap between described stator sleeve and the mover.
7, on the upper end cap brake hole is set.
Advantage of the present invention is: the present invention is directed to deficiency in the past, provide a kind of quality that can vibrate different controlled devices to realize the bump leveller of a plurality of bump leveller concatenation function.
(1) a plurality of these same type bump levellers can be realized connecting up and down with being rigidly connected respectively of mover axle by end cap, a plurality of bump levellers after the series connection can be summarized as a bump leveller with bigger absorbing quality, thereby can change the absorbing quality by the series connection number that changes bump leveller, so that it is applicable to the controlled device of various quality.
(2) facewidth is than more reasonable, facewidth comparison bump leveller Effect on Performance is very big, 0.2 facewidth specific energy make the operational frequency bandwidth of bump leveller and the linearity of ELECTROMAGNETIC STIFFNESS reach best, the facewidth of traditional electrical magnetic-type bump leveller is 0.5 than what adopt, this performance to bump leveller is disadvantageous.
(3) upper end cap is processed with brake hole, when running into the out of contior situations of bump leveller such as controlled device, damages because of the violent bump of mover for avoiding bump leveller, can use stay bolt that mover is locked by brake hole.
Description of drawings
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
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 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, parts such as linear bearing 9.Stator sleeve 8, upper end cap 4, lower end cap 10 have constituted the standing part of bump leveller.Field coil 7 is installed in the grooving of mover 6, and mover 6 is fixedly mounted on the mover axle 2, has constituted the motion parts of bump leveller.The mechanical spring 5 of mover top and the bottom is enclosed within on the mover axle 2, and an 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 effect of mechanical spring 5 is that mover is positioned, two mechanical spring rigidity are identical, the length difference, the deadweight of making a concerted effort to offset the absorbing quality by its reduction length difference generation, realize that mover gear ring and stator ring are in over against the position when original state, alignment error can be adjusted by the plus-minus pad during installation.
Mover 6 central outer wall processing circular grooves of the present invention, field coil 7 is installed in the circular groove, mover axle 2 and mover 6 interference fit, two mechanical springs 5 are installed in and are used between end cap and the mover 6 mover 6 is supported the location, end cap 4,10 is installed in stator sleeve about in the of 8 two ends up and down, and mover 6 moves down vertically relative to end cap.Mover axle 2 upper ends are processed with is with externally threaded projection, and mover axle lower end is processed with tapped groove, and projection and groove can closely cooperate by screw thread.Mover axle 2 is processed with keyway in the place that cooperates with upper end cap 4, and upper end cap 4 is processed with key in the place that cooperates with mover axle 2, makes mover axle 2 end cap axial displacement relatively.Stator sleeve 8 internal surfaces, mover 6 outer surfaces all are processed with annular tooth ring, and the facewidth of gear ring, tooth pitch and the number of teeth equate.The facewidth of gear ring is 0.2 than the ratio of tooth pitch (facewidth with).There is small air gap between stator sleeve 8 and the mover 6.Upper end cap 4 is processed with brake hole 3.
Mover axle 2 upper ends are processed with is with externally threaded projection, and mover axle 2 lower ends are processed with tapped groove.Projection and groove can closely cooperate by screw thread, can realize that the mover axle of two identical bump levellers of the present invention is fixedly connected.Be processed with the size screw identical with the position up and down around the end cap, can realize that the stator sleeve of two identical bump levellers of the present invention is fixedly connected, 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 so that it has surface of good 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 maximum feeding safe current is 2.75A, and the maximum operating currenbt of the present invention's design is 2.5A, in the maximum safe current scope, can guarantee that the present invention can the operation of long-term security ground.
When feeding the current value change of field coil 7, the 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 feeding electric current, the rigidity of bump leveller is mechanical spring rigidity, and corresponding is the minimum natural frequency of bump leveller; When feeding 2.5A, the rigidity of bump leveller is ELECTROMAGNETIC STIFFNESS and spring rate summation, and corresponding is the maximum natural frequency of bump leveller.Calculate and experiment by simulation software, can measure the natural frequency of each current value correspondence in 0～2.5A scope.During work, can change natural frequency of the present invention by regulating current value, carry out absorbing thereby follow the trail of the controlled object frequency.
When single bump leveller is worked, it is to fixedly connected that bump leveller shakes with controlled master by the screw around the lower end cap, uses shaft-cup and braking port lid that the bump leveller upper end cap is sealed, and the lead-in wire that stretches 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 last bump leveller is fixedlyed connected by the screw around the end cap with the upper end cap of following bump leveller, fixedly connected with the screw thread of groove by projection with the mover axle of following bump leveller upper end in the mover axle lower end of last bump leveller, the lead-in wire of bump leveller becomes a lead-in wire by connection up and down, thereby makes two bump levellers be connected into new " a big bump leveller ".The rest may be inferred, can make n bump leveller series connection become new " a big bump leveller ".Because the axial electromagnetic force after the series connection of n bump leveller and absorbing quality increase n doubly simultaneously, so " big bump leveller " and single bump leveller of the present invention corresponding natural frequency under electric current equally is identical.Need to prove that the projection of bump leveller and groove screw-thread fit are also loose up and down, need switch on during series connection makes and just connects after the electromagnetic spring work, can play the effect that fixed lobe and groove do not rotate in little bump leveller separately 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 became one " big bump leveller ", the absorbing quality of then being somebody's turn to do " big bump leveller " was nm
aIf it is that quality is m that controlled master shakes
z, according to vibration control theory as can be known, work as mass ratio
The time, shock attenuation result is just obvious, considers the factor of cost and practical application in addition, and mass ratio μ can not be excessive, generally gets 0.1≤μ≤0.3.In actual applications, the quality that can shake and be according to controlled master calculates the bump leveller number n that needs series connection, thereby " big bump leveller " after the series connection met the requirements at mass ratio.
Upper end cap 4 is processed with brake hole, and diameter is M10, when the bump leveller operation irregularity, can use the stay bolt of M1O by brake hole mover to be carried out locked braking, and end cap causes damage to prevent mover from clashing into up and down unusually.
Air gap between mover gear ring and stator sleeve gear ring is very little, so in up and down end cap outer rim and stator sleeve contacting point processing grooving, for stator sleeve is positioned, minor shifts and mover gear ring rub to avoid it to take place radially.
The end of field coil 7 leads is adopted flexible cord is installed, and the high frequency that can adapt to mover moves repeatedly.
Claims (8)
1. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of can connecting, it is characterized in that: comprise the bump leveller unit, described bump leveller unit comprises upper end cap, lower end cap, stator sleeve, thereby stator sleeve links to each other with lower end cap with upper end cap respectively and constitutes framework, mover is installed in the framework, pass the mover axle in the middle of the mover, mover axle upper end is positioned on the upper end cap, mover axle lower end is positioned at the lower end cap place, mover axle and mover interference fit, mover middle part outer surface arranges circular groove, and field coil is installed in the circular groove, have the hole on the stator sleeve, lead-in wire connects field coil and passes from the hole.
2. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 1 is characterized in that: first mechanical spring is installed between mover and the upper end cap, second mechanical spring is installed between mover and the lower end cap.
3. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 2, it is characterized in that: be processed with keyway in the place that cooperates with upper end cap on the described mover axle, be processed with key in the place that cooperates with the mover axle on the upper end cap, keyway cooperates with key, makes the end cap axial displacement relatively of mover axle.
4. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 3, it is characterized in that: comprise two or more bump levellers unit, mover axle upper end is for being with externally threaded projection, mover axle lower end is tapped groove, connect in the mode of arranging up and down between the bump leveller unit, the projection of passing through separately between adjacent two bump leveller unit links to each other with groove.
5. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 4, it is characterized in that: described stator sleeve internal surface, mover outer surface all are processed with annular tooth ring, and the facewidth of gear ring, tooth pitch and the number of teeth equate.
6. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 5, it is characterized in that: the facewidth ratio of described gear ring is 0.2.
7. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 6 is characterized in that: have air gap between described stator sleeve and the mover.
8. the asymmetric tooth pitch electromagnetic type semi active vibration absorber of connecting according to claim 7 is characterized in that: brake hole is set on the upper end cap.
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 |
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| Publication Number | Publication Date |
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| CN103291828A true CN103291828A (en) | 2013-09-11 |
| CN103291828B 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295651A (en) * | 2014-10-20 | 2015-01-21 | 哈尔滨工程大学 | Variable-damping hybrid power vibration absorber |
| CN105317912A (en) * | 2015-11-13 | 2016-02-10 | 哈尔滨工程大学 | Wideband semi-active vibration absorber with adjustable rigidity and damping |
| CN105909713A (en) * | 2016-05-12 | 2016-08-31 | 哈尔滨工程大学 | High-linearity electromagnetic type semi-active vibration absorber |
| CN107339352A (en) * | 2017-08-21 | 2017-11-10 | 哈尔滨工程大学 | A kind of electromagnetism Electromechanical Coupling Circuit tunes 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 |
| CN112253681A (en) * | 2020-09-22 | 2021-01-22 | 江苏科技大学 | Tension-compression type energy-absorbing buffering device |
| WO2021135174A1 (en) * | 2019-12-31 | 2021-07-08 | 中科振声（苏州）电子科技有限公司 | Modular vibration absorber, vibration absorber module, and machine tool |
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| CN102410336A (en) * | 2011-11-07 | 2012-04-11 | 哈尔滨工程大学 | Coil external type semiactive vibration absorber in enclosed structure |
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2013
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Patent Citations (5)
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| GB1471843A (en) * | 1974-02-08 | 1977-04-27 | Hitachi Ltd | Arrangement of rotar stator and eddy current damper |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295651A (en) * | 2014-10-20 | 2015-01-21 | 哈尔滨工程大学 | Variable-damping hybrid power vibration absorber |
| 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 |
| CN105317912A (en) * | 2015-11-13 | 2016-02-10 | 哈尔滨工程大学 | Wideband semi-active vibration absorber with adjustable rigidity and damping |
| CN105909713A (en) * | 2016-05-12 | 2016-08-31 | 哈尔滨工程大学 | High-linearity electromagnetic type 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 |
| CN107339352A (en) * | 2017-08-21 | 2017-11-10 | 哈尔滨工程大学 | A kind of electromagnetism Electromechanical Coupling Circuit tunes 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 |
| WO2021135174A1 (en) * | 2019-12-31 | 2021-07-08 | 中科振声（苏州）电子科技有限公司 | Modular vibration absorber, vibration absorber module, and machine tool |
| CN112253681A (en) * | 2020-09-22 | 2021-01-22 | 江苏科技大学 | Tension-compression type energy-absorbing buffering device |
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