CN104595403B - Low rigidity heavy duty low frequency two-wire steel-wire isolator - Google Patents
Low rigidity heavy duty low frequency two-wire steel-wire isolator Download PDFInfo
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- CN104595403B CN104595403B CN201510039464.8A CN201510039464A CN104595403B CN 104595403 B CN104595403 B CN 104595403B CN 201510039464 A CN201510039464 A CN 201510039464A CN 104595403 B CN104595403 B CN 104595403B
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- wire
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- connecting rod
- wire rope
- heavy duty
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides a kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator, including negative stiffness damper mechanism and two-wire steel wire rope damper mechanism, and the negative stiffness damper mechanism and two-wire steel wire rope damper mechanism are connected in parallel.The present invention can effectively reduce the intrinsic frequency of vibrating isolation system, and good effectiveness in vibration suppression is played to low-frequency vibration.
Description
Technical field
The invention belongs to precision instrument and field of mechanical technique, for heavy load precision instrument every it is micro- shake, vehicle-mounted accurate instrument
A kind of vibration isolation of device, and in particular to Low rigidity heavy duty low frequency two-wire steel-wire isolator.
Background technology
The certainty of measurement of heavy load precision instrument and equipment especially large-scale optical instrument is extremely sensitive to effect of vibration, big portion
Point passive vibration isolation system can centering, dither play good vibration isolation effect, the effectiveness in vibration suppression to low-frequency vibration is not but good,
Main cause is：Itself load capacity and stiffness by itself of heavily loaded shock absorber mutually restrict (then stiffness by itself is big greatly for loading capacity, Gu
There is frequency high；The small then stiffness by itself of loading capacity is small, and intrinsic frequency is low), and large-scale precision instrument requirement shock absorber has carrying weight
The characteristics of big stiffness by itself is small, and intrinsic frequency is low is measured, the low frequency vibration damping effect on driving birds is not good of passive vibration isolation system has been thus resulted in.
The content of the invention
Original wire rope damper is improved to two-wire steel wire rope vibration damping by the present invention for the above-mentioned deficiency of prior art
Device, and a kind of new Low rigidity heavy duty steel wire rope vibration isolating mechanism of positive and negative Stiffness principle design is utilized on its basis,
Mechanism rationally is utilized, the intrinsic frequency of vibrating isolation system can be effectively reduced, good effectiveness in vibration suppression is played to low-frequency vibration.
In order to solve the above-mentioned technical problem, the invention provides following technical scheme：
A kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator, including negative stiffness damper mechanism and two-wire steel wire rope vibration damping
Mechanism, the negative stiffness damper mechanism and two-wire steel wire rope damper mechanism are connected in parallel.
The two-wire steel wire rope damper mechanism includes：Support base and two groups of steel wire ropes；The support base is provided with through hole, institute
The diameter dimension for stating through hole can be while steel wire rope described in clamping so that the steel wire rope is just by two groups of steel wire ropes
Bore is identical, and the through hole of the support base is alternately passed through successively.
The support base is made up of upper cover plate and lower cover, and the upper cover plate and lower cover are tightened together by screw,
The diameter dimension for having through hole uniform two-by-two, the through hole in the middle of the support base can be caused while steel wire rope described in clamping
The steel wire rope is just by two groups of steel wire rope bores are identical, and the through hole of the support base is alternately passed through successively.
The steel wire rope is twisted shape steel wire rope, wound in the way of twisted shape by the finer wire beam of twisted shape respectively and
Into.
The winding angle of the steel wire rope is 15 ° with vertical direction angulation.
The negative stiffness damper mechanism includes：Two groups of central guide rail sliding block negative rigidity mechanisms and two groups of link-type negative stiffness machines
Structure, the link-type negative rigidity mechanism is arranged in the two-wire steel wire rope damper mechanism two ends.
The central guide rail sliding block negative rigidity mechanism includes guide rail, sliding block, upper ball cup, ball head connecting rod, lower ball cup, leads
Rail sliding block negative stiffness extension spring and spring carrier arm, the guide rail are fixed by screws on the support base, are arranged on the guide rail
Two sliding blocks, are equipped with a lower ball cup on each described sliding block, the upper ball cup and the lower ball cup pass through the ball
Head connecting rod connection；Distance is necessarily less than the distance between described two lower ball cups between described two upper ball cups, it is described under
Connected by the extension spring of guide rail slide block negative stiffness and spring carrier arm between ball cup.
Spherical pair is between the ball head connecting rod and upper ball cup, lower ball cup.
The link-type negative rigidity mechanism includes the upper connecting rod hinged seat, single bulb upper connecting rod, the ball head connecting rod that are sequentially connected
Hinged seat, lower link, lower link lower hinge seat on seat, lower link, the upper connecting rod hinge seat and lower link lower hinge seat are respectively
It is fixed on support base；The ball head connecting rod seat is fastened with lower link upper hinge seat by screw, the ball head connecting rod seat in every group
It is connected by the extension spring of connecting rod negative stiffness and spring carrier arm between the ball head connecting rod seat in another group.
It is spherical pair between single bulb upper connecting rod and ball head connecting rod seat.
The beneficial effects of the invention are as follows using the design of two-wire wirerope-winding and the design of positive and negative Stiffness, load capacity is big
In ordinary steel rope shock absorber, rigidity is much smaller than ordinary steel rope shock absorber, and relative damping is more than ordinary steel rope shock absorber；It is negative
Rigidity mechanism key junction uses spherical pair, and negative rigidity mechanism can be made to adapt to the shape of steel wire rope damper mechanism different directions
Become so that mechanism is integrally respectively provided with the characteristic of Low rigidity in different directions；It is suitable rigidity can be chosen according to actual conditions
Negative stiffness extension spring is changed, so that shock absorber reaches optimal effectiveness in vibration suppression in real work；To in each free degree
Vibratory output be respectively provided with preferable vibration-damping function；Compact conformation, substantially reduces the space shared by mounting dampers；Used zero
Part is simple, low cost；It is lightweight, it is easy for installation, it is easy to safeguard；Oil resistant, anticorrosive, Anti-temperature difference, moisture-resistant degree, it is ageing-resistant.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with reality of the invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is Low rigidity heavy duty two-wire wire rope damper structural representation；
Fig. 2 is the right view schematic diagram of Fig. 1；
Fig. 3 is two-wire steel wire rope damper mechanism schematic diagram；
Fig. 4 is the right view schematic diagram of Fig. 3；
Fig. 5 is central guide rail sliding block negative rigidity mechanism schematic diagram；
Fig. 6 is the right view schematic diagram of Fig. 5；
Fig. 7 is connecting rod negative rigidity mechanism schematic diagram；
Fig. 8 is the right view schematic diagram of Fig. 7；
Fig. 9 is fundamental diagram of the invention.
Specific embodiment
As shown in figs 1-9, the present invention discloses a kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator, including negative stiffness subtracts
Shake Agency line steel wire rope damper mechanism, and negative stiffness damper mechanism and two-wire steel wire rope damper mechanism are connected in parallel.
As shown in Figure 3,4, two-wire steel wire rope damper mechanism includes：Support base and two groups of steel wire ropes 7；Support base is by upper cover plate
1 and lower cover 2 constitute, upper cover plate 1 and lower cover 2 are tightened together by screw, there is through hole uniform two-by-two in the middle of support base,
The diameter of through hole is slightly less than the diameter of steel wire rope 7, and upper and lower cover plates compresses steel wire rope in assembling process so that steel wire rope 7 and branch
Support seat is closely connected, and two groups of bores of steel wire rope 7 are identical, and the through hole of support base is alternately passed through successively.
In the present embodiment, steel wire rope is twisted shape steel wire rope, respectively by the finer wire beam of twisted shape with the side of twisted shape
Formula is entwined.
The winding angle of steel wire rope 7 is 15 ° with vertical direction angulation so that in the case of assembling easily is ensured
With larger bearing capacity.
As viewed in figures 5-8, negative stiffness damper mechanism includes：Central guide rail sliding block negative rigidity mechanism and two groups of link-types are negative firm
Degree mechanism, link-type negative rigidity mechanism is arranged in two-wire steel wire rope damper mechanism two ends.
Central guide rail sliding block negative rigidity mechanism includes guide rail 8, sliding block 9, upper ball cup 10, ball head connecting rod 11, lower ball cup
20th, guide rail slide block negative stiffness extension spring 12 and spring carrier arm 13, guide rail 8 are fixed by screws on support base, and two are arranged on guide rail 8
Individual sliding block 9, is equipped with a lower ball cup 20 on each sliding block 9, upper ball cup 10 and lower ball cup 20 are connected by ball head connecting rod 11
Connect, hung by guide rail slide block negative stiffness extension spring 22 and spring between the lower ball cup 20 in every group in lower ball cup 20 and another group
Hook 23 is connected.Spherical pair is between ball head connecting rod 11 and upper ball cup 10, lower ball cup 20.
Link-type negative rigidity mechanism includes the upper connecting rod hinged seat 3, single bulb upper connecting rod 4, the ball head connecting rod seat that are sequentially connected
5th, 33 points of hinged seat 6, lower link 14, lower link lower hinge seat 33 on lower link, upper connecting rod hinge seat 3 and lower link lower hinge seat
It is not fixed on support base；Ball head connecting rod seat 5 is fastened with lower link upper hinge seat 6 by screw, between two ball head connecting rod seats 5
Connected by connecting rod negative stiffness extension spring 22 and spring carrier arm 23.It is spherical pair between single bulb upper connecting rod 4 and ball head connecting rod seat 5.
Specific works mode of the invention is：A kind of Low rigidity heavy duty two-wire steel-wire isolator of the present invention is according to positive and negative
What the theory and bifilar wound mode of Stiffness were designed.In assembling process, two upper support seats are connected by screw with weight, this
When weight fall within shock absorber.When system percussion vibrated, two-wire steel wire rope damper mechanism is negative firm together with two kinds
Degree damper mechanism produces vibration deformation simultaneously.Two-wire steel wire rope damper mechanism takes double-steel wire rope to wind design, with larger
Positive rigidity and damping higher, can bear large deformation, absorb larger impact energy, also with vibration damping bandwidth the characteristics of；Institute
Central guide rail slide block mechanism and linkage are stated because the connected mode of spring makes it have negative stiffness function and certain carrying
The characteristic of ability, it is in parallel with two-wire steel wire rope mechanism after, increase two-wire wire rope damper bearing capacity while reduce
Its rigidity.Above-mentioned bifilar wound and positive and negative Stiffness are designed and cause that whole mechanism's bearing capacity and damping are all higher than general steel wire rope
Shock absorber, while the intrinsic frequency of system is reduced, according to load and the feature of vibrational excitation, Rational choice negative rigidity mechanism bullet
The rigidity of spring and the thickness of steel wire rope, extremely low shape can be reduced in the case where bearing capacity is ensured by system frequency
State, so that, good vibration isolating effect is played in impact vibrated.
If Fig. 9 is schematic diagram of the invention, it is seen then that loading capacity of the invention is more than common steel-wire isolator.
To sum up, using the design of two-wire wirerope-winding and the design of positive and negative Stiffness, load capacity is more than common for the present invention
Wire rope damper, rigidity is much smaller than ordinary steel rope shock absorber, and relative damping is more than ordinary steel rope shock absorber；
Negative rigidity mechanism key junction uses spherical pair, negative rigidity mechanism can be made to adapt to steel wire rope damper mechanism different
The deformation in direction so that mechanism is integrally respectively provided with the characteristic of Low rigidity in different directions；Can choose firm according to actual conditions
Spend suitable negative stiffness extension spring to be changed, so that shock absorber reaches optimal effectiveness in vibration suppression in real work；To each
Vibratory output in the free degree is respectively provided with preferable vibration-damping function；Compact conformation, substantially reduces the sky shared by mounting dampers
Between；Parts used are simple, low cost；It is lightweight, it is easy for installation, it is easy to safeguard；Oil resistant, anticorrosive, Anti-temperature difference, moisture-resistant degree,
It is ageing-resistant.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, although with reference to foregoing reality
Apply example to be described in detail the present invention, for a person skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic.It is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator, it is characterised in that including negative stiffness damper mechanism and two-wire
Steel wire rope damper mechanism, the negative stiffness damper mechanism includes：Two groups of central guide rail sliding block negative rigidity mechanisms and two groups of link-types
Negative rigidity mechanism, the link-type negative rigidity mechanism is arranged in the two-wire steel wire rope damper mechanism two ends, and the negative stiffness subtracts
The Agency line steel wire rope damper mechanism that shakes is connected in parallel.
2. Low rigidity according to claim 1 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that the two-wire steel
Cord damper mechanism includes：Support base and two groups of steel wire ropes；The support base is provided with through hole, and the diameter dimension of the through hole can
Cause the steel wire rope just by two groups of steel wire rope bores are identical, replace successively while steel wire rope described in clamping
Through the through hole of the support base.
3. Low rigidity according to claim 2 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that the steel wire rope
It is twisted shape steel wire rope, is entwined in the way of twisted shape by the finer wire beam of twisted shape respectively.
4. Low rigidity according to claim 2 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that：The steel wire rope
Winding angle and vertical direction angulation be 15 °.
5. Low rigidity according to claim 2 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that lead in the center
Rail sliding block negative rigidity mechanism include guide rail, sliding block, upper ball cup, ball head connecting rod, lower ball cup, the extension spring of guide rail slide block negative stiffness and
Spring carrier arm, the guide rail is fixed by screws on the support base, and two sliding blocks, each described cunning are arranged on the guide rail
One lower ball cup is housed, the upper ball cup and the lower ball cup are connected by the ball head connecting rod on block；It is described two
Distance is necessarily less than the distance between described two lower ball cups between upper ball cup, is slided by guide rail between the lower ball cup
The extension spring of block negative stiffness and spring carrier arm are connected.
6. Low rigidity according to claim 5 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that the bulb connects
Spherical pair is between bar and upper ball cup, lower ball cup.
7. Low rigidity according to claim 2 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that the link-type
Hinged seat on upper connecting rod hinged seat that negative rigidity mechanism includes being sequentially connected, single bulb upper connecting rod, ball head connecting rod seat, lower link,
Lower link, lower link lower hinge seat, the upper connecting rod hinged seat and lower link lower hinge seat are individually fixed on support base；It is described
Ball head connecting rod seat is fastened with hinged seat on lower link by screw, ball head connecting rod in every group seat with another group in ball head connecting rod
Connected by the extension spring of connecting rod negative stiffness and spring carrier arm between seat.
8. Low rigidity according to claim 7 heavy duty low frequency two-wire steel-wire isolator, it is characterised in that single bulb
It is spherical pair between upper connecting rod and ball head connecting rod seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039464.8A CN104595403B (en) | 2015-01-26 | 2015-01-26 | Low rigidity heavy duty low frequency two-wire steel-wire isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039464.8A CN104595403B (en) | 2015-01-26 | 2015-01-26 | Low rigidity heavy duty low frequency two-wire steel-wire isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104595403A CN104595403A (en) | 2015-05-06 |
| CN104595403B true CN104595403B (en) | 2017-06-06 |
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| CN201510039464.8A Active CN104595403B (en) | 2015-01-26 | 2015-01-26 | Low rigidity heavy duty low frequency two-wire steel-wire isolator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317902B (en) * | 2015-11-12 | 2017-06-20 | 哈尔滨工程大学 | A kind of vibration isolator of replaceable spring |
| CN110454544A (en) * | 2019-08-12 | 2019-11-15 | 西北工业大学 | A kind of non-linear rigidity vibration-isolating platform for optoelectronic device |
| CN111188871A (en) * | 2020-01-02 | 2020-05-22 | 湖南大学 | Quasi-zero stiffness vibration isolator |
| CN111188424B (en) * | 2020-01-02 | 2024-04-16 | 湖南大学 | Quasicont zero stiffness vibration isolator for bending beam |
| CN114732203B (en) * | 2022-04-29 | 2022-12-23 | 湖南大学 | Suspension load-reducing backpack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1257320A1 (en) * | 1984-07-04 | 1986-09-15 | Производственное Объединение "Ново-Краматорский Машиностроительный Завод" | Shock-absorber |
| JPH11247935A (en) * | 1998-02-26 | 1999-09-14 | Nec Eng Ltd | Wire mount and supporting structure using it |
| CN2814003Y (en) * | 2005-04-25 | 2006-09-06 | 中国人民解放军总参谋部工程兵科研三所 | Double-twising wire rope vibration-damper |
| CN102410329B (en) * | 2011-09-10 | 2014-04-02 | 中国兵器工业第二〇六研究所 | Compound vibration-isolating and buffering device |
| CN202381623U (en) * | 2011-11-17 | 2012-08-15 | 华中科技大学 | Precision active damper |
| CN204437152U (en) * | 2015-01-26 | 2015-07-01 | 中科院南京天文仪器有限公司 | Low rigidity heavy duty low frequency two-wire steel-wire isolator |
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