CN104595403A - Low-rigidity heavy-duty low-frequency double-wire rope vibration isolator - Google Patents
Low-rigidity heavy-duty low-frequency double-wire rope vibration isolator Download PDFInfo
- Publication number
- CN104595403A CN104595403A CN201510039464.8A CN201510039464A CN104595403A CN 104595403 A CN104595403 A CN 104595403A CN 201510039464 A CN201510039464 A CN 201510039464A CN 104595403 A CN104595403 A CN 104595403A
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- Prior art keywords
- wire
- wire rope
- connecting rod
- rigidity
- heavy duty
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Classifications
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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 invention provides a low-rigidity heavy-duty low-frequency double-wire rope vibration isolator, which comprises a negative-rigidity damping mechanism and a double-wire rope damping mechanism, and the negative-rigidity damping mechanism and the double-wire rope damping mechanism are connected in parallel. The low-rigidity heavy-duty low-frequency double-wire rope vibration isolator can effectively decrease the inherent frequency of a vibration isolation system, and has a good damping effect for low-frequency vibration.
Description
Technical field
The invention belongs to precision type instrument and field of mechanical technique, for heavy load precision type instrument every micro-ly shaking, the vibration isolation of vehicle-mounted precision type instrument, be specifically related to a kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator.
Background technique
The measuring accuracy of the especially large-scale optical instrument of heavy load precision instrument and equipment is extremely responsive to effect of vibration, major part passive vibration isolation system centering, dither can play good vibration isolation effect, but not good to the effectiveness in vibration suppression of low-frequency vibration, main cause is: self load capacity of heavily loaded vibration damper and stiffness by itself restrict mutually, and (carrying capacity greatly then stiffness by itself is large, and natural frequency is high; The little then stiffness by itself of carrying capacity is little, and natural frequency is low), and large-scale precision instrument requires vibration damper to have the large stiffness by itself of load capacity little, the feature that natural frequency is low, thus causes the low frequency vibration damping poor effect of passive vibration isolation system.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, original wire rope damper is improved to two-wire wire rope damper, and on its basis, utilize a kind of new Low rigidity heavy duty of positive and negative Stiffness principle design wire rope vibration isolating mechanism, Appropriate application mechanism, effectively can reduce the natural frequency of vibrating isolation system, good effectiveness in vibration suppression is played to low-frequency vibration.
In order to solve the problems of the technologies described above, the invention provides following technological scheme:
A kind of Low rigidity heavy duty low frequency two-wire steel-wire isolator, comprise negative stiffness damper mechanism and two-wire wire rope damper mechanism, described negative stiffness damper mechanism and two-wire wire rope damper mechanism are connected in parallel.
Described two-wire wire rope damper mechanism comprises: supporting base and two groups of wire rope; Described supporting base is provided with through hole, the diameter dimension of described through hole can make while the described wire rope of clamping described wire rope just by, described two groups of wire rope bores are identical, successively alternately through the through hole of described supporting base.
Described supporting base is made up of upper cover plate and lower cover plate, described upper cover plate and lower cover plate pass through together with screw fastening, through hole uniform is between two had in the middle of described supporting base, the diameter dimension of described through hole can make while the described wire rope of clamping described wire rope just by, described two groups of wire rope bores are identical, successively alternately through the through hole of described supporting base.
Described wire rope is twisted shape wire rope, is entwined respectively by the finer wire bundle of twisted shape in the mode of twisted shape.
The winding angle of described wire rope and vertical direction angulation are 15 °.
Described negative stiffness damper mechanism comprises: two groups of central guide rail slide block negative rigidity mechanism and two groups of linkage type negative rigidity mechanism, and described linkage type negative rigidity mechanism is arranged in described two-wire wire rope damper mechanism two ends.
Described central guide rail slide block negative rigidity mechanism comprises guide rail, slide 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, described guide rail is fixed by screws on described supporting base, two slide blocks arranged by described guide rail, each described slide block is equipped with a lower ball cup, described upper ball cup is connected by described ball head connecting rod with described lower ball cup; The spacing of described two upper ball cups must be less than the distance between described two lower ball cups, is connected between described lower ball cup by the extension spring of guide rail slide block negative stiffness with spring carrier arm.
Spherical pair is between described ball head connecting rod and upper ball cup, lower ball cup.
Described linkage type negative rigidity mechanism to comprise on the upper rod hinge connection seat connected successively, single bulb on connecting rod, ball head connecting rod seat, lower link hinge base under hinged seat, lower link, lower link, and under described upper connecting rod link seat and lower link, hinge base is individually fixed on supporting base; Described ball head connecting rod seat and lower link upper hinge seat, by screw fastening, are connected by the extension spring of connecting rod negative stiffness and spring carrier arm between the ball head connecting rod seat often in group and the ball head connecting rod seat in another group.
It described single bulb is spherical pair between connecting rod and ball head connecting rod seat.
The invention has the beneficial effects as follows and adopt the design of two-wire wirerope-winding and the design of positive and negative Stiffness, load capacity is greater than ordinary steel rope vibration damper, and rigidity is much smaller than ordinary steel rope vibration damper, and relative damping is greater than ordinary steel rope vibration damper; The crucial joint of negative rigidity mechanism adopts spherical pair, negative rigidity mechanism can be made to adapt to the deformation of wire rope damper mechanism different direction, make whole mechanism all have the characteristic of Low rigidity in different directions; The negative stiffness extension spring can choosing rigidity suitable according to actual conditions is changed, thus makes the effectiveness in vibration suppression that vibration damper reaches best in real work; To the vibratory output in each degrees of freedom, all there is good vibration-damping function; Compact structure, substantially reduces the space shared by mounting dampers; Component used are simple, and cost is low; Lightweight, easy for installation, be easy to safeguard; Oil resistant, anticorrosive, Anti-temperature difference, moisture-resistant degree, ageing-resistant.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, 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 elevation schematic diagram of Fig. 1;
Fig. 3 is two-wire wire rope damper mechanism schematic diagram;
Fig. 4 is the right elevation schematic diagram of Fig. 3;
Fig. 5 is central guide rail slide block negative rigidity mechanism schematic diagram;
Fig. 6 is the right elevation schematic diagram of Fig. 5;
Fig. 7 is connecting rod negative rigidity mechanism schematic diagram;
Fig. 8 is the right elevation schematic diagram of Fig. 7;
Fig. 9 is fundamental diagram of the present invention.
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, and comprise negative stiffness damper mechanism and two-wire wire rope damper mechanism, negative stiffness damper mechanism and two-wire wire rope damper mechanism are connected in parallel.
As shown in Figure 3,4, two-wire wire rope damper mechanism comprises: supporting base and two groups of wire rope 7; Supporting base is made up of upper cover plate 1 and lower cover plate 2, upper cover plate 1 and lower cover plate 2 pass through together with screw fastening, through hole uniform is between two had in the middle of supporting base, the diameter of through hole is slightly less than the diameter of wire rope 7, upper and lower cover plates compresses wire rope in assembly process, make wire rope 7 and supporting base compact siro spinning technology, two groups of wire rope 7 bores are identical, successively alternately through the through hole of supporting base.
In the present embodiment, wire rope is twisted shape wire rope, is entwined respectively by the finer wire bundle of twisted shape in the mode of twisted shape.
Winding angle and the vertical direction angulation of wire rope 7 are 15 °, make to assemble in guarantee to have larger bearing capacity in situation easily.
As viewed in figures 5-8, negative stiffness damper mechanism comprises: central guide rail slide block negative rigidity mechanism and two groups of linkage type negative rigidity mechanism, linkage type negative rigidity mechanism is arranged in two-wire wire rope damper mechanism two ends.
Central guide rail slide block negative rigidity mechanism comprises guide rail 8, slide block 9, upper ball cup 10, ball head connecting rod 11, lower ball cup 20, guide rail slide block negative stiffness extension spring 12 and spring carrier arm 13, guide rail 8 is fixed by screws on supporting base, two slide blocks 9 arranged by guide rail 8, a lower ball cup 20 each slide block 9 is equipped with, upper ball cup 10 is connected by ball head connecting rod 11 with lower ball cup 20, is connected under often in group between ball cup 20 and the lower ball cup 20 in another group by guide rail slide block negative stiffness extension spring 22 and spring carrier arm 23.Spherical pair is between ball head connecting rod 11 and upper ball cup 10, lower ball cup 20.
Linkage type negative rigidity mechanism to comprise on the upper rod hinge connection seat 3 connected successively, single bulb on connecting rod 4, ball head connecting rod seat 5, lower link hinge base 33 under hinged seat 6, lower link 14, lower link, and under upper connecting rod link seat 3 and lower link, hinge base 33 is individually fixed on supporting base; Ball head connecting rod seat 5 and lower link upper hinge seat 6, by screw fastening, are connected with spring carrier arm 23 by connecting rod negative stiffness extension spring 22 between two ball head connecting rod seats 5.Single bulb is spherical pair between connecting rod 4 and ball head connecting rod seat 5.
Specific works mode of the present invention is: a kind of Low rigidity of the present invention heavy duty two-wire steel-wire isolator is according to the theory of positive and negative Stiffness and bifilar wound patten's design.In assembly process, two upper support seats are connected with weight by screw, and now weight falls within vibration damper.When system is subject to vibratory impulse effect, two-wire wire rope damper mechanism produces vibration deformation together with two kinds of negative stiffness damper mechanisms simultaneously.Two-wire wire rope damper mechanism takes double-steel wire rope to be wound around design, has larger positive rigidity and higher damping, can bear large deformation, absorb larger impact energy, also have the feature of vibration damping Bandwidth; Described central guide rail slide-block mechanism and linkage mechanism make it have the characteristic of negative stiffness function and certain bearing capacity due to the Placement of spring, after in parallel with two-wire wire rope mechanism, while increase two-wire wire rope damper bearing capacity, reduce its rigidity.Above-mentioned bifilar wound and the design of positive and negative Stiffness make whole mechanism bearing capacity and damping all be greater than general wire rope damper, reduce the natural frequency of system simultaneously, according to the feature of load and vibrational excitation, the rigidity of Rational choice negative rigidity mechanism spring and the thickness of wire rope, system frequency can be reduced to extremely low state when ensureing bearing capacity, thus, good vibration isolating effect is played when being subject to vibratory impulse.
If Fig. 9 is schematic diagram of the present invention, visible, carrying capacity of the present invention is greater than common steel-wire isolator.
To sum up, the present invention adopts two-wire wirerope-winding to design and the design of positive and negative Stiffness, and load capacity is greater than ordinary steel rope vibration damper, and rigidity is much smaller than ordinary steel rope vibration damper, and relative damping is greater than ordinary steel rope vibration damper;
The crucial joint of negative rigidity mechanism adopts spherical pair, negative rigidity mechanism can be made to adapt to the deformation of wire rope damper mechanism different direction, make whole mechanism all have the characteristic of Low rigidity in different directions; The negative stiffness extension spring can choosing rigidity suitable according to actual conditions is changed, thus makes the effectiveness in vibration suppression that vibration damper reaches best in real work; To the vibratory output in each degrees of freedom, all there is good vibration-damping function; Compact structure, substantially reduces the space shared by mounting dampers; Component used are simple, and cost is low; Lightweight, easy for installation, be easy to safeguard; Oil resistant, anticorrosive, Anti-temperature difference, moisture-resistant degree, ageing-resistant.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Low rigidity heavy duty low frequency two-wire steel-wire isolator, it is characterized in that, comprise negative stiffness damper mechanism and two-wire wire rope damper mechanism, described negative stiffness damper mechanism and two-wire wire rope damper mechanism are connected in parallel.
2. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 1, it is characterized in that, described two-wire wire rope damper mechanism comprises: supporting base and two groups of wire rope; Described supporting base is provided with through hole, the diameter dimension of described through hole can make while the described wire rope of clamping described wire rope just by, described two groups of wire rope bores are identical, successively alternately through the through hole of described supporting base.
3. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 2, it is characterized in that, described supporting base is made up of upper cover plate and lower cover plate, described upper cover plate and lower cover plate pass through together with screw fastening, through hole uniform is between two had in the middle of described supporting base, the diameter dimension of described through hole can make while the described wire rope of clamping described wire rope just by, described two groups of wire rope bores are identical, successively alternately through the through hole of described supporting base.
4. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 2, it is characterized in that, described wire rope is twisted shape wire rope, is entwined respectively by the finer wire bundle of twisted shape in the mode of twisted shape.
5. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 2, is characterized in that: the winding angle of described wire rope and vertical direction angulation are 15 °.
6. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 1 and 2, it is characterized in that, described negative stiffness damper mechanism comprises: two groups of central guide rail slide block negative rigidity mechanism and two groups of linkage type negative rigidity mechanism, and described linkage type negative rigidity mechanism is arranged in described two-wire wire rope damper mechanism two ends.
7. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 6, it is characterized in that, described central guide rail slide block negative rigidity mechanism comprises guide rail, slide 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, described guide rail is fixed by screws on described supporting base, two slide blocks arranged by described guide rail, each described slide block is equipped with a lower ball cup, described upper ball cup is connected by described ball head connecting rod with described lower ball cup; The spacing of described two upper ball cups must be less than the distance between described two lower ball cups, is connected between described lower ball cup by the extension spring of guide rail slide block negative stiffness with spring carrier arm.
8. Low rigidity according to claim 7 heavy duty low frequency two-wire steel-wire isolator, is characterized in that, is spherical pair between described ball head connecting rod and upper ball cup, lower ball cup.
9. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 6, it is characterized in that, described linkage type negative rigidity mechanism to comprise on the upper rod hinge connection seat connected successively, single bulb on connecting rod, ball head connecting rod seat, lower link hinge base under hinged seat, lower link, lower link, and under described upper connecting rod link seat and lower link, hinge base is individually fixed on supporting base; Described ball head connecting rod seat and lower link upper hinge seat, by screw fastening, are connected by the extension spring of connecting rod negative stiffness and spring carrier arm between the ball head connecting rod seat often in group and the ball head connecting rod seat in another group.
10. Low rigidity heavy duty low frequency two-wire steel-wire isolator according to claim 9, it is characterized in that, described single bulb is spherical pair between 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN104595403A true CN104595403A (en) | 2015-05-06 |
| CN104595403B 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317902A (en) * | 2015-11-12 | 2016-02-10 | 哈尔滨工程大学 | Vibration isolator with replaceable springs |
| 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 |
| CN111188424A (en) * | 2020-01-02 | 2020-05-22 | 湖南大学 | Quasi-zero stiffness vibration isolator for bending beam |
| CN114732203A (en) * | 2022-04-29 | 2022-07-12 | 湖南大学 | Suspension burden-reducing backpack |
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2015
- 2015-01-26 CN CN201510039464.8A patent/CN104595403B/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317902A (en) * | 2015-11-12 | 2016-02-10 | 哈尔滨工程大学 | Vibration isolator with replaceable springs |
| 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 |
| CN111188424A (en) * | 2020-01-02 | 2020-05-22 | 湖南大学 | Quasi-zero stiffness vibration isolator for bending beam |
| CN111188424B (en) * | 2020-01-02 | 2024-04-16 | 湖南大学 | Quasicont zero stiffness vibration isolator for bending beam |
| CN114732203A (en) * | 2022-04-29 | 2022-07-12 | 湖南大学 | Suspension burden-reducing backpack |
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| CN104595403B (en) | 2017-06-06 |
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