CN204213239U - The dynamic vibration absorber that a kind of rigidity is adjustable - Google Patents
The dynamic vibration absorber that a kind of rigidity is adjustable Download PDFInfo
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- CN204213239U CN204213239U CN201420667640.3U CN201420667640U CN204213239U CN 204213239 U CN204213239 U CN 204213239U CN 201420667640 U CN201420667640 U CN 201420667640U CN 204213239 U CN204213239 U CN 204213239U
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Abstract
The utility model discloses the dynamic vibration absorber that a kind of rigidity is adjustable, comprise hydraulic servomechanism and housing, the internal cavities of housing is piston cavity; Hydraulic servomechanism is connected with piston cavity; Piston cavity inside is provided with piston, and piston is fixed with overhang; One end of overhang is stretched out piston cavity and is provided with mass block, and the quality of mass block is certain; The accent of piston cavity is provided with the rubber seal coordinated with overhang.The utility model controls the change of circular cantilevers beam extension by adopting hydraulic servomechanism and then changes rigidity, thus change the natural frequency of bump leveller, the natural frequency of bump leveller can be regulated identical with the vibration frequency of high Spee ' d Vertical Machining Centre, reach the vibration control to high Spee ' d Vertical Machining Centre, improve the machining accuracy of high Spee ' d Vertical Machining Centre; This bump leveller is simple in adjustment natural frequency, and cost is low, has wide application prospect.
Description
Technical field
The utility model belongs to the vibration damping field of high Spee ' d Vertical Machining Centre, is specifically related to the dynamic vibration absorber that a kind of rigidity is adjustable.
Background technique
The development of science and technology, the raising of productivity, all be unable to do without mechanical structure.People life in run into some conventional components be all through machining and come, wherein high Spee ' d Vertical Machining Centre is common mechanical structure, it is in high-speed machining process, select the reason such as not good, clamping is insecure due to the dynamic unbalance of the contact stress of cutter and Tool Room, electro spindle and servo-control system, workpiece configurations irregular structure, reference level and cause vibration, and the frequency of vibration is change, because influence of vibration the machining accuracy of high Spee ' d Vertical Machining Centre, therefore need the vibration eliminating high Spee ' d Vertical Machining Centre.
Existing high Spee ' d Vertical Machining Centre oscillation damping method mainly comprises damping vibration attenuation, parallels vibration damping, and these methods all exist the narrower and nonadjustable shortcoming of frequency of vibration damping frequency band.And high Spee ' d Vertical Machining Centre causes the frequency band of its work wider due to the difference of processing accessories, its vibration frequency is not single.Therefore, design and a kind ofly can follow the change of high Spee ' d Vertical Machining Centre vibration frequency and change the dynamic vibration absorber of own frequency, have great importance in the machining accuracy improving high Spee ' d Vertical Machining Centre.
Summary of the invention
For prior art Problems existing or defect, the purpose of this utility model is, the dynamic vibration absorber that a kind of rigidity is adjustable is provided, be arranged on high Spee ' d Vertical Machining Centre, the extrusion of overhang is constantly changed by hydraulic servomechanism, and then change the rigidity of dynamic vibration absorber, reach the object changing bump leveller self natural frequency, reach the object to high Spee ' d Vertical Machining Centre absorbing.
In order to realize above-mentioned task, the utility model by the following technical solutions:
The dynamic vibration absorber that rigidity is adjustable, comprises hydraulic servomechanism and housing, and the internal cavities of housing is piston cavity; Hydraulic servomechanism is connected with piston cavity; Piston cavity inside is provided with piston, and piston is fixed with overhang; One end of overhang is stretched out piston cavity and is provided with mass block, and the quality of mass block is certain; The accent of piston cavity is provided with the rubber seal coordinated with overhang.
Further, described hydraulic servomechanism comprises the first hydraulic oil container, motor, oil hydraulic pump, the second hydraulic oil container, three-position four-way electromagnetic directional valve and hydraulic pressure delivery line, wherein,
Above first hydraulic oil container, oil hydraulic pump is installed, oil hydraulic pump connects motor, the top of oil hydraulic pump connects three-position four-way electromagnetic directional valve, arranges the second hydraulic oil container, be connected above three-position four-way electromagnetic directional valve by hydraulic pressure delivery line with piston cavity below three-position four-way electromagnetic directional valve.
Further, be connected with relief valve between described oil hydraulic pump and three-position four-way electromagnetic directional valve, relief valve end is provided with the 3rd hydraulic oil container.
Further, described housing surrounding is uniformly distributed multiple bolt hole.
Further, described mass block is fixed by nut.
The dynamic vibration absorber that a kind of rigidity of the present utility model is adjustable, is arranged on high Spee ' d Vertical Machining Centre, by adopting hydraulic servomechanism control the change of overhang extension and then change rigidity, thus changes the natural frequency of bump leveller; By regulating the natural frequency of bump leveller, making it identical with the vibration frequency of high Spee ' d Vertical Machining Centre, realizing the object to high Spee ' d Vertical Machining Centre absorbing, improve the machining accuracy of high Spee ' d Vertical Machining Centre; This bump leveller is simple in adjustment natural frequency, and cost is low, is with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is the adjustable dynamic vibration absorber structural representation of a kind of rigidity of the present utility model;
Number in the figure represents: 1-first hydraulic oil container, 2-motor, 3-oil hydraulic pump, 4-second hydraulic oil container, 5-three-position four-way electromagnetic directional valve, 6-hydraulic pressure delivery line, 7-piston cavity, 8-overhang, 9-nut, 10-mass block, 11-rubber seal, 12-housing, 13-bolt hole, 14-piston, 15-relief valve, 16-the 3rd hydraulic oil container.
Embodiment
Follow technique scheme of the present utility model; below provide an embodiment of the present utility model; it should be noted that; the utility model scope required for protection is not limited to following specific embodiment, and all equivalents done on technical scheme basis all fall into protection domain of the present utility model.
See Fig. 1, this gives the dynamic vibration absorber that a kind of rigidity is adjustable, comprise hydraulic servomechanism and housing 12, the internal cavities of housing 12 is piston cavity 7; Hydraulic servomechanism is connected with piston cavity 7; Piston cavity 7 inside is provided with piston 14, piston 14 is fixed with overhang 8, prevents both appearance in working procedure from loosening.
Overhang 8 can adopt circular cantilevers beam, and its diameter is less; One end of overhang 8 is stretched out piston cavity 7 and is provided with mass block 10, the quality of mass block 10 is certain, overhang 8 due to diameter less, the overhang of diameter D=20mm can be adopted, Linear density is little, therefore the impact that the distributed mass can ignoring overhang 8 round bar is brought, its quality can be ignored relative to mass block 10, and the material of overhang 8 can select the red medicine of aluminum alloy to ensure that it has certain rigidity.
Piston 14 drives overhang 8 to move outside piston cavity 7 or in piston cavity 7 and reaches and changes the object that overhang 8 stretches out the length of piston cavity 7, according to formula
k is the rigidity of bump leveller, and L is the length of mass block 10 barycenter to bump leveller proximal shell, i.e. the effective length of overhang, E is the Young's modulus of overhang, I is the cross sectional moment of inertia of overhang 8, and when overhang length L changes, the rigidity k of bump leveller of the present utility model changes; Again according to formula
m is the quality of mass block 10, and ω is the natural frequency of bump leveller, and because the quality of mass block 10 remains unchanged, when rigidity k changes, the natural frequency ω of bump leveller changes.
The accent of piston cavity 7 is provided with the rubber seal 11 coordinated with overhang 8, and the accent of piston cavity 7 is used for making overhang 8 stretch out piston cavity 7; Rubber seal 11, outside piston cavity 7 or when moving in piston cavity 7, plays wiping action to overhang 8, prevents the hydraulic oil in piston cavity 7 from leaking, plays seal action to the hydraulic oil in piston cavity 7.
Further, housing 12 surrounding of bump leveller is uniformly distributed multiple bolt hole 13, can adopt 4, is fixed on high Spee ' d Vertical Machining Centre with 4 hex head bolts.
Further, the quality of mass block 10 is optional, and be fixed on overhang 8 by nut 9, in working procedure, its quality remains unchanged.
Hydraulic servomechanism comprises the first hydraulic oil container 1, motor 2, oil hydraulic pump 3, second hydraulic oil container 4, three-position four-way electromagnetic directional valve 5, hydraulic pressure delivery line 6.Wherein,
First hydraulic oil container 1 connecting fluid press pump 3, oil hydraulic pump 3 is installed motor 2, oil hydraulic pump 3 connects three-position four-way electromagnetic directional valve 5, and three-position four-way electromagnetic directional valve 5 end arranges the second hydraulic oil container 4, and three-position four-way electromagnetic directional valve 5 is connected with piston cavity 7 by hydraulic pressure delivery line 6.
Further, be connected with relief valve 15 between oil hydraulic pump 3 and three-position four-way electromagnetic directional valve 5, relief valve 15 end is provided with the 3rd hydraulic oil container 16.At overhang 8 under the drive of piston 14 outwards or when inwardly moving; piston 14 walk to maximum position be expressed to piston cavity inwall time; relief valve 15 conducting; hydraulic oil is transported out through oil hydraulic pump 3 and directly flows back to the 3rd hydraulic oil container 16 through relief valve 15, protective action is served to piston 14, oil hydraulic pump 3 and whole pipeline.
The three-position four-way electromagnetic directional valve 5 of hydraulic servomechanism has three working positions: when the energising work of left end electromagnet, the left end oil circuit conducting of three-position four-way electromagnetic directional valve 5; When the energising work of right-hand member electromagnet time, now three-position four-way electromagnetic directional valve 5 right-hand member oil circuit conducting; During three-position four-way electromagnetic directional valve 5 power-off, valve body mediates, the not conductings of two ends oil circuit, and the natural frequency of bump leveller is no longer changed.
Preferably, the oil hydraulic pump 3 of hydraulic servomechanism adopts common gear type metering pump, and the hydraulic fluid flow rate exported by oil hydraulic pump 3 and volume are certain, add the stationarity of the flow of fluid in delivery line.
First hydraulic oil container 1, second hydraulic oil container 4 of hydraulic servomechanism and the 3rd hydraulic oil container 16, motor 2, three-position four-way electromagnetic directional valve 5, hydraulic pressure delivery line 6, relief valve 15 is all that standard piece can directly be selected.
The working principle of the dynamic vibration absorber that rigidity of the present utility model is adjustable is as follows:
When the left end electromagnet energising work of three-position four-way electromagnetic directional valve 5, the conducting of left end oil circuit, hydraulic oil enters on the left of piston cavity 7, hydraulic oil promotes piston 14 outwards movement, make overhang 8 outwards movement, overhang 8 extension increases, because of mass conservation, cause overhang 8 rigidity to diminish, the natural frequency of bump leveller diminishes; When the right-hand member electromagnet energising work of three-position four-way electromagnetic directional valve 5, right-hand member oil circuit is connected, hydraulic oil enters the right side of piston cavity 7, hydraulic oil promotes piston 14 and moves inward, the extension of overhang 8 is reduced, because of mass conservation, cause the rigidity of overhang 8 to increase, finally cause the natural frequency of bump leveller to raise.
Claims (5)
1. the dynamic vibration absorber that rigidity is adjustable, is characterized in that, comprises hydraulic servomechanism and housing (12), and the internal cavities of housing (12) is piston cavity (7); Hydraulic servomechanism is connected with piston cavity (7); Piston cavity (7) inside is provided with piston (14), piston (14) is fixed with overhang (8); One end of overhang (8) is stretched out piston cavity (7) and is provided with mass block (10), and the quality of mass block (10) is certain; The accent of piston cavity (7) is provided with the rubber seal (11) coordinated with overhang (8).
2. the dynamic vibration absorber that rigidity as claimed in claim 1 is adjustable, it is characterized in that, described hydraulic servomechanism comprises the first hydraulic oil container (1), motor (2), oil hydraulic pump (3), the second hydraulic oil container (4), three-position four-way electromagnetic directional valve (5) and hydraulic pressure delivery line (6), wherein
First hydraulic oil container (1) connecting fluid press pump (3), oil hydraulic pump (3) is installed motor (2), oil hydraulic pump (3) connects three-position four-way electromagnetic directional valve (5), three-position four-way electromagnetic directional valve (5) end arranges the second hydraulic oil container (4), and three-position four-way electromagnetic directional valve (5) is connected with piston cavity (7) by hydraulic pressure delivery line (6).
3. the dynamic vibration absorber that rigidity as claimed in claim 2 is adjustable, it is characterized in that, be connected with relief valve (15) between described oil hydraulic pump (3) and three-position four-way electromagnetic directional valve (5), relief valve (15) end is provided with the 3rd hydraulic oil container (16).
4. the dynamic vibration absorber that rigidity as claimed in claim 1 is adjustable, it is characterized in that, described housing (12) surrounding is uniformly distributed multiple bolt hole (13).
5. the dynamic vibration absorber that rigidity as claimed in claim 1 is adjustable, is characterized in that, described mass block (10) is fixed by nut (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667640.3U CN204213239U (en) | 2014-11-10 | 2014-11-10 | The dynamic vibration absorber that a kind of rigidity is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667640.3U CN204213239U (en) | 2014-11-10 | 2014-11-10 | The dynamic vibration absorber that a kind of rigidity is adjustable |
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| Publication Number | Publication Date |
|---|---|
| CN204213239U true CN204213239U (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420667640.3U Expired - Fee Related CN204213239U (en) | 2014-11-10 | 2014-11-10 | The dynamic vibration absorber that a kind of rigidity is adjustable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122326A (en) * | 2016-08-31 | 2016-11-16 | 上海交通大学 | Continuous elastic rigidity adjuster |
| CN106612030A (en) * | 2015-10-21 | 2017-05-03 | 上海微电子装备有限公司 | Vibration damping device for rotary motor |
| CN110259241A (en) * | 2019-06-19 | 2019-09-20 | 同济大学 | The intelligent tuning mass damper of half active variable damping of adaptive variation rigidity |
| CN110630475A (en) * | 2019-09-27 | 2019-12-31 | 珠海格力电器股份有限公司 | Active frequency-modulation vibration absorption device and method for air conditioner compressor of electric vehicle |
-
2014
- 2014-11-10 CN CN201420667640.3U patent/CN204213239U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106612030A (en) * | 2015-10-21 | 2017-05-03 | 上海微电子装备有限公司 | Vibration damping device for rotary motor |
| CN106612030B (en) * | 2015-10-21 | 2019-07-23 | 上海微电子装备（集团）股份有限公司 | Vibration absorber for rotating electric machine |
| CN106122326A (en) * | 2016-08-31 | 2016-11-16 | 上海交通大学 | Continuous elastic rigidity adjuster |
| CN110259241A (en) * | 2019-06-19 | 2019-09-20 | 同济大学 | The intelligent tuning mass damper of half active variable damping of adaptive variation rigidity |
| CN110630475A (en) * | 2019-09-27 | 2019-12-31 | 珠海格力电器股份有限公司 | Active frequency-modulation vibration absorption device and method for air conditioner compressor of electric vehicle |
| CN110630475B (en) * | 2019-09-27 | 2023-11-24 | 珠海格力电器股份有限公司 | Active frequency modulation vibration absorbing device and method for air conditioner compressor of electric vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20161110 |