CN203009677U - Fluid trainer dynamic vibration absorber with adjustable parameters - Google Patents
Fluid trainer dynamic vibration absorber with adjustable parameters Download PDFInfo
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- CN203009677U CN203009677U CN 201220696894 CN201220696894U CN203009677U CN 203009677 U CN203009677 U CN 203009677U CN 201220696894 CN201220696894 CN 201220696894 CN 201220696894 U CN201220696894 U CN 201220696894U CN 203009677 U CN203009677 U CN 203009677U
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- dynamic vibration
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Abstract
The utility model relates to a fluid trainer dynamic vibration absorber with adjustable parameters. The fluid trainer dynamic vibration absorber with the adjustable parameters comprises a foundation mass block, mass adjusting blocks, pressure springs, a damper, installation rods, preloaded nuts and long bolts, the installation rods arranged in pairs penetrate through installation holes in the foundation mass block, the upper section and the lower section of each installation rod are respectively provided with one pressure spring, one end of each pressure spring abuts against a surface of the foundation mass block, and the other end of each pressure spring is fixed on one installation rod through one preloaded nut. The mass adjusting blocks are fixed on the foundation mass block through the paired long bolts. The damper comprises a damping cylinder, a piston and a piston rod, a sticky damping medium is filled in the damping cylinder, the damping cylinder is fixed on a controlled object, and an extension end of the piston rod is fixed on the foundation mass block. According to the fluid trainer dynamic vibration absorber with the adjustable parameters, partial parameters can be adjustable, by adding or reducing the mass adjusting blocks and fine adjusting mass blocks, the intrinsic frequency change of the vibration absorber is achieved so as to be adaptive to requirements of various controlled objects or various working conditions, by adopting various models of dish-shaped pistons, the system damping is changed, and the system robustness is improved.
Description
Technical field
The utility model relates to the vibration damping equipment in vibration control field, is specifically related to the adjustable hydraulic resistance dynamic vibration absorber of a kind of parameter, is particularly suitable for the structure with internal cavities.
Background technique
Along with the progress of social development and science and technology, increasing large scale structure such as high building, bridge etc. all need to examine wind-engaging to carry makes the dynamic performance of used time, so needs its model is carried out tunnel test before building these structures.In addition, aircraft also needs to carry out the wind tunnel force measurement experiment in development process, with the airflow influence that is subject under the Reality simulation regime of flight.The shoe mode is the supporting way that the experiment of wind tunnel model dynamometry is often adopted, and is characterized in that model is fixed on formation one cantilever structure on attack angle mechanism by the gentle afterbody pole in sky.This structure has the low feature of first natural frequency, is carrying out dynamometry when experiment easily and air motion frequency is coupled, so that the high vibration of production model.Due to can not damage model the aerodynamic characteristic on surface, can't apply control force in the model outside, so many control modes are not suitable for using under this state environment.Only utilize the cavity structure of model inside, consider that vibrating controller is installed by section within it.Yet the cavity size of dynamometry model is usually very limited, and the control gear that therefore need to design compact structure could satisfy the vibration control of this kinds of structures.
Usually the tuned mass damper (Tuned Mass Damper, TMD) that adopts is a kind of passive shock-absorbing means of classics, is comprised of mass block, stage clip and damper.In actual applications, TMD combines with controlled structures, develop and various structural types with different characteristics, announced a kind of " stage clip stiffness-adjustable tuning mass bumper " as the utility model patent that application number is CN200710115262.2, this model utility realizes the change of TMD resonant frequency by the method for regulating stage clip rigidity, to reach the purpose that absorbs controlled object vibration energy, be fit to be applied to the vibration damping control of longspan pedestrian overpass, harbour trestle and dependency structure.In addition, the variation of TMD frequency can also realize by the quality of regulation piece, and this mode relative stiffness is regulated more easy and more reliable.Yet, tradition TMD quality adjustment realizes (being the method that adopts in the utility model patent of CN200410087664.2 as application number) by the mass block of stack same thickness, can't realize the regulating step of finely tuning after first coarse adjustment can not rapidly and accurately the bump leveller resonant frequency being transferred to suitable state in practical operation.Damping adjusting aspect, present existing bump leveller or tuned mass damper usually adopt at damped cylinder side connecting tube, and the mode that throttle valve is set in the pipeline neutral position realizes the adjusting of Buddhist nun's parameter, this structural type is unfavorable for taking full advantage of of spatial structure, is not suitable for the application that is subjected to the installing space restriction.
The model utility content
The resonance problem that the utility model produces in wind tunnel force measurement experimental model and dependency structure experimentation in order to solve the said structure model, and a kind of volume compact is provided, space availability ratio is high, and the adjustable hydraulic resistance dynamic vibration absorber of parameter.
The hydraulic resistance dynamic vibration absorber that a kind of parameter described in the utility model is adjustable, it is used for being arranged on controlled object, comprise mass of foundation piece, quality adjustment piece, stage clip, damper, mounting rod, pre-load nut and stay bolt, the mounting rod of described paired setting passes the mounting hole on the mass of foundation piece, every mounting rod two sections are installed with a stage clip, it is surperficial that one end of stage clip is against the mass of foundation piece, and the other end is fixed on mounting rod by pre-load nut; The quality adjustment piece is fixed on the mass of foundation piece by paired stay bolt; Damper comprises damped cylinder, piston and piston rod, filling viscous damping medium in damped cylinder, and damped cylinder is fixed on controlled object, and the external part of piston rod is fixed on the mass of foundation piece.
the utility model is for limited space, adaptive model inside, the one, select highdensity metallic material, as lead as moving element (mass of foundation piece, the quality fine setting piece of quality adjustment piece and back) material, the 2nd, increase the volume of moving element in rational scope as far as possible, except the mass of foundation piece, the quality adjustment number of blocks that volume is slightly little can have polylith, realized the maximization of moving element volume in the situation that guarantee enough spaces, guarantee that bump leveller can provide enough kinetic energy to offset the vibration of controlled structures, and the quality adjustment number of blocks is adjustable, realized the parameter selection function.
As improvement of the present utility model, it also is provided with quality fine setting piece, and described quality fine setting piece is fixed on the quality adjustment piece.Other quality adjustment piece is little relatively for the thickness of quality fine setting piece, and length direction do not relate to the mounting point of stage clip, make regulate more convenient.The frequency of rough calculation bump leveller at first in carrying out the quality adjustment process, extrapolate the required quality size of system according to known stage clip rigidity, the upper and lower quality adjustment piece of some is installed by the coarse adjustment mode, is adopted during near design frequency quality fine setting piece to realize adjusting to the bump leveller frequency at the bump leveller actual frequency.
Further, the piston in described damper is dish-shaped piston, and dish-shaped piston face and horizontal plane have angle, and described angular range is 0
0～45
0Between.In order to change the system motion damping, described dish-shaped piston face gathers and is communicated with the through hole on piston two sides.
The dish-shaped piston that the bump leveller damping force is provided is an individual components, is connected by the mode of being spirally connected with piston rod.Dish piston upper and lower surface and horizontal plane have certain angle, have certain interval between dish-shaped piston and damping casing wall, and the assurance piston can unrestricted motion in resisting medium, and the adjusting of damping realizes by the piston that assembles the different surfaces angle.Set up through hole along moving direction and also can change kinetic damping on dish-shaped piston, the shape of through hole, size and the distribution situation in piston arrange according to actual needs.
The diameter of section of described mounting rod intermediate section is greater than the diameter of section at two ends, make each mounting rod have respectively up and down two fixedly positive stop ends, fixedly installing in order to regulate the spacing shim of stage clip initial compression position outside positive stop end, pre-load nut compresses stage clip by spacing shim.
Two of mounting rod fixing positive stop ends its objective is the mounting point of restriction pre-load nut.Employing at pre-load nut and the mode that spacing shim (spacing shim shape, size and fixedly the positive stop end end face is consistent) fixedly is set between positive stop end regulate the practical function position of positive stop end, reach the purpose of being regulated the stage clip initial deformation by pre-load nut.By two stage clip Placements, the mass of foundation piece is fixed between two stage clips, then realizes be connected (single stage clip one end is fixedly connected with the mass of foundation piece, and the other end is compacted to the mounting rod positive stop end by pre-load nut) with mounting rod by pre-load nut.
One end or the two ends of described mounting rod are fixed on controlled object.The mass of foundation piece, quality adjustment piece and quality fine setting piece all adopt the high desnity metal material to make, and as steel or lead, or are mixed by steel and lead.
The utility model can be realized the adjustable of partial parameters, realizes the variation of bump leveller natural frequency by increase and decrease quality of regulation piece and fine setting mass block, to adapt to the demand of different controlled objects or different operating modes; Dish-shaped piston by adopting different model improves system robustness to change system damping.Its volume compact in addition, space availability ratio is high.
Description of drawings
Fig. 1 is embodiment 1 structural representation,
Fig. 2 is dish-shaped piston side view,
Fig. 3 is dish-shaped piston plan view,
Fig. 4 is embodiment 2 structural representation,
Fig. 5 is B place partial enlarged drawing in Fig. 4,
Fig. 6 is the utility model scheme of installation.
1-mass of foundation piece wherein; 2-quality adjustment piece (on); 3-quality adjustment piece (under); 4-quality fine setting piece; The 5-stage clip; The 6-damped cylinder; 7-dish piston; The 8-piston rod; The 9-mounting rod; The 10-pre-load nut; The 11-stay bolt; 12-dish piston face; The 13-through hole; The 14-bolt hole; The 15-spacing shim; 16-cavity shell.
Embodiment
Embodiment 1:
The hydraulic resistance dynamic vibration absorber that a kind of parameter as shown in Figure 1 is adjustable, critical piece comprise mass of foundation piece 1, some quality adjustment pieces, comprise the regulating block 2 of improving quality, lower quality adjustment piece 3, and quality fine setting piece 4, damped cylinder 6 and two groups of mounting rods 9.Mass of foundation piece 1 is connected by four stage clips 5 with mounting rod 9, and one group of mounting rod 9 is furnished with two stage clips 5, and an end of stage clip is fixedly connected with mass of foundation piece 1, and the other end is fixed on mounting rod 9 by pre-load nut 10.Improve quality regulating block 2, lower quality adjustment piece 3 and fine setting piece 4 is fixed on mass of foundation piece 1 by a pair of stay bolt 11.Damped cylinder 6 is fixed on controlled object, filling viscous damping medium (adopting silicone oil here) in cylinder, and dish-shaped piston 7 is placed in cylinder, and piston outer and casing wall keep the 5mm gap.As shown in Figure 2, dish-shaped piston face 12 becomes 15 with horizontal plane
0Angle, piston face have through hole 13(along moving direction and see Fig. 3), piston 7 is connected with piston rod by bolt hole 14 connections.Being used for the mass block of absorbing vibrational energy all adopts the high desnity metal material plumbous, to guarantee to improve as far as possible the quality of moving element in the confined space.
Upper and lower quality adjustment piece all need reserve the certain size through hole in order to stage clip is installed.In addition, following quality adjustment piece need further reserve the space of placing damped cylinder, and does not produce interference with damped cylinder in ensure quality piece movement process, if damped cylinder designs in the upper end, and need to be by top quality adjustment piece slot milling.
Embodiment 2:
Bump leveller shown in Figure 4 be used for to suppress to have the vibration of the cantilever structure of cavity, is to take full advantage of limited space with embodiment 1 difference and improves the bump leveller moving element quality of (comprising mass of foundation piece 1, quality adjustment piece 2,3, quality fine setting piece 4).Realize the raising of heavy moving parts from two approach, the first is selected highdensity metallic material, selects plumbous material as moving element here; It two is to take full advantage of cavity size, increase the volume of moving element in rational scope as far as possible, increase the quantity of quality adjustment piece 2 and 3 in the utility model, in the situation that guarantee that enough spaces have realized the maximization of moving element volume, guarantee that bump leveller can provide enough kinetic energy to offset the vibration of controlled structures.The stage clip of bump leveller is selected to be complementary with the quality of moving element, guarantees that the bump leveller natural frequency can be adjusted to the state consistent with the system resonance frequency.Pre-load nut and mounting rod fixedly are provided with spacing shim 15(Fig. 5 between positive stop end), by the pretightening force that the quantity that changes spacing shim is regulated stage clip 5, adjustment criteria is guarantee in the stage clip movement process not tension power effect and remain that its distortion is in elastic range.Fig. 6 is the assembling schematic diagram of this routine bump leveller in the controlled model cavity, and bump leveller is fixedly connected with cavity shell 16 by mounting rod 9, and damped cylinder 6 is fixedly connected with cavity shell 16 by bolt.
The concrete application approach of the utility model is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection domain of the present utility model.
Claims (6)
1. hydraulic resistance dynamic vibration absorber that parameter is adjustable, it is used for being arranged on controlled object, it is characterized in that comprising mass of foundation piece (1), quality adjustment piece (2, 3), stage clip (5), damper, mounting rod (9), pre-load nut (10) and stay bolt (11), the mounting rod of described paired setting (9) passes the mounting hole on mass of foundation piece (1), every mounting rod (9) two sections are installed with a stage clip (5), one end of stage clip is against mass of foundation piece (1) surface, the other end is fixed on mounting rod (9) by pre-load nut (10), quality adjustment piece (2,3) is fixed on mass of foundation piece (1) by paired stay bolt (11), damper comprises damped cylinder (6), piston (7) and piston rod (8), the interior filling viscous damping of damped cylinder (6) medium, and damped cylinder (6) is fixed on controlled object, and the external part of piston rod (8) is fixed on mass of foundation piece (1).
2. the adjustable hydraulic resistance dynamic vibration absorber of parameter according to claim 1, is characterized in that, it also is provided with quality fine setting piece (4), and described quality fine setting piece (4) is fixed on quality adjustment piece (2,3).
3. the adjustable hydraulic resistance dynamic vibration absorber of parameter according to claim 1 and 2, is characterized in that, the piston in described damper (7) is dish-shaped piston, and dish-shaped piston face and horizontal plane have angle, and described angular range is 0
0～45
0Between.
4. the adjustable hydraulic resistance dynamic vibration absorber of parameter according to claim 3, is characterized in that, described dish-shaped piston face gathers and is communicated with the through hole on piston two sides.
5. the adjustable hydraulic resistance dynamic vibration absorber of parameter according to claim 1 and 2, it is characterized in that, the diameter of section of described mounting rod intermediate section is greater than the diameter of section at two ends, make each mounting rod have respectively up and down two fixedly positive stop ends, spacing shim (15) in order to regulate stage clip initial compression position is installed in the fixing positive stop end outside, and pre-load nut (10) compresses stage clip (5) in conjunction with spacing shim (15).
6. the adjustable hydraulic resistance dynamic vibration absorber of parameter according to claim 1 and 2, is characterized in that, an end or the two ends of described mounting rod (9) are fixed on controlled object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696894 CN203009677U (en) | 2012-12-17 | 2012-12-17 | Fluid trainer dynamic vibration absorber with adjustable parameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696894 CN203009677U (en) | 2012-12-17 | 2012-12-17 | Fluid trainer dynamic vibration absorber with adjustable parameters |
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| Publication Number | Publication Date |
|---|---|
| CN203009677U true CN203009677U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220696894 Withdrawn - After Issue CN203009677U (en) | 2012-12-17 | 2012-12-17 | Fluid trainer dynamic vibration absorber with adjustable parameters |
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| CN (1) | CN203009677U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016605A (en) * | 2012-12-17 | 2013-04-03 | 南京航空航天大学 | Liquid resistance type dynamic vibration absorber with adjustable parameters |
| CN106641094A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Dynamic vibration absorber for fan stator and installation method of dynamic vibration absorber |
| CN107387638A (en) * | 2017-08-28 | 2017-11-24 | 中国船舶重工集团公司第七〇九研究所 | A kind of spring type bump leveller |
-
2012
- 2012-12-17 CN CN 201220696894 patent/CN203009677U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016605A (en) * | 2012-12-17 | 2013-04-03 | 南京航空航天大学 | Liquid resistance type dynamic vibration absorber with adjustable parameters |
| CN103016605B (en) * | 2012-12-17 | 2014-08-06 | 南京航空航天大学 | Liquid resistance type dynamic vibration absorber with adjustable parameters |
| CN106641094A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Dynamic vibration absorber for fan stator and installation method of dynamic vibration absorber |
| CN106641094B (en) * | 2015-11-04 | 2018-11-13 | 株洲时代新材料科技股份有限公司 | A kind of fan stator dynamic vibration absorber and its installation method |
| CN107387638A (en) * | 2017-08-28 | 2017-11-24 | 中国船舶重工集团公司第七〇九研究所 | A kind of spring type bump leveller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130619 Effective date of abandoning: 20140806 |
|
| RGAV | Abandon patent right to avoid regrant |