CN104747652B - A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring - Google Patents
A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring Download PDFInfo
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- CN104747652B CN104747652B CN201510097824.XA CN201510097824A CN104747652B CN 104747652 B CN104747652 B CN 104747652B CN 201510097824 A CN201510097824 A CN 201510097824A CN 104747652 B CN104747652 B CN 104747652B
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- permanent magnet
- helical spring
- clamping device
- spring
- magnet
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring, including quality support bar, one end of quality support bar is connected by screw thread with helical spring；The permanent magnet clamped by helical spring moves axially with respect to helical spring clamping device together with helical spring, quality support bar, and helical spring provides positive rigidity for system vertically simultaneously；The two pieces of annular permanent magnets fixed by permanent magnet clamping device apply captivation to the permanent magnet clamped by helical spring respectively, and three pieces of permanent magnets constitute a magnet spring, and provide nonlinear restoring force and non-linear negative stiffness for system；By the relative distance between the upper and lower two pieces of permanent magnets of turn-knob permanent magnet clamping device, i.e. scalable and the permanent magnet clamped by helical spring；Apparatus of the present invention can be effectively reduced the natural frequency of vibrating isolation system, and then has widened vibration isolation frequency band；Meanwhile, improve and be improved to the damping characteristic of structure, control to provide a kind of method reliably for low-frequency vibration.
Description
Technical field
The present invention relates to vibration isolation technique field, be specifically related to a kind of use helical spring in parallel with magnet spring
Quasi-zero stiffness vibration isolators.
Background technology
Mechanical oscillatory structure phenomenon is prevalent in the middle of the production practices of reality.When system is by extraneous vibration source
Excitation time, it will produce vibration.People utilize vibration can be production practices service, as industrial frequently with
Vibration screening, pile vibrosinking, vibrating transportation and by Theory of Vibration design sensor etc.；But,
Science and techniques of defence, industrial machinery and the technical field such as instrument, instrument, mechanical vibration frequently can lead to structure
Damage inactivation, the problems such as certainty of measurement reduces, shortening in service life.Such as, the vibration meeting of instrument, instrument
Its certainty of measurement is caused to reduce；During Spacecraft Launch, shock loading is likely to result in structural damage inefficacy etc..
When processing nuisance vibration problem, vibration isolation technique may often be such that top-priority method.With common active
Vibration isolation, semi-active vibration-isolating are compared, and passive type vibration isolation has use simply due to it, it is not necessary to extraneous offer energy
Source, the advantage such as good stability and be widely adopted.For the medium-high frequency oscillating component in mechanical vibration problem,
Can use and have evolved into ripe linear theory of vibration isolation and correlation method realizes effectively controlling, when excitation frequency
Rate is more than vibrating isolation system undamped natural frequency of a mechanical systemTimes time, traditional linear vibration isolator just has vibration isolating effect,
But the vibration for low band frequency range is often difficult to effectively isolate.Vibration isolation frequency due to general linear vibration isolator
Band is restricted, in order to the vibration to low frequency region effectively controls, non-linear low frequency vibration isolation is managed
Opinion and method have had the research that some are relevant.Frequently with a kind of method by reduce vibrating isolation system
Rigidity widens vibration isolation frequency band, but the rigidity reducing vibrating isolation system will cause quiet deformation to increase, and reduces system
Stability.For solving this problem, quasi-zero stiffness vibration isolators, high static state-low dynamic rate vibrating isolation system obtain
The concern of many scholars.Due to the performance of permanent magnet with preparation achieved with certain progress, use permanent magnetism
Structure is designed to be had the vibrating isolation system of quasi-zero stiffness characteristic and seems relatively easy；But, in certain design
Under index, design natural frequency low, simple in construction and the little Nonlinear Vibration Isolation System of bulk, just
Seem more difficulty.
Summary of the invention
For the problem overcoming prior art to exist, the purpose of the present invention is to propose to a kind of employing helical spring and magnetic
Property the in parallel quasi-zero stiffness vibration isolators of spring, apparatus of the present invention have near its operating position high static rigidity-
Low dynamic rate characteristic, can be used for the operating modes such as low frequency vibration isolation, buffering, and has simple in construction, easy for installation,
Bearing capacity is big, the feature of low cost, it is possible to be effectively reduced the natural frequency of vibrating isolation system, and then widen
Vibration isolation frequency band；Meanwhile, improve and be improved to the damping characteristic of structure, control to provide one for low-frequency vibration
Method reliably.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring, including helical spring 7, if
Put the first annular permanent magnet 15 in helical spring 7 central cavity, be arranged on helical spring 7 central cavity
The middle permanent magnet of upper end fixes lid 6；The threaded one end section of the quality support bar 1 of the two ends section of being threaded passes
Permanent magnet fixes screwed hole, the centre bore of intermediate annular permanent magnet 15 and helical spring 7 center cavity of lid 6
Screwed hole of centre bottom body, described middle permanent magnet fixes screwed hole and helical spring 7 center cavity of lid 6
Screwed hole of centre bottom body is suitable with the thread segment of quality support bar 1, described first annular permanent magnet 15
The thread segment matched in clearance of centre bore and quality support bar 1；The middle non-threaded of described quality support bar 1
The axially arranged Constrained quality support bar 1 of section makes its not magnetic conduction linear bearing 2 axially movable, and magnetic conduction is not straight
Bobbin holds the outside of 2 and is provided with inner and outer wall screwed upper end permanent magnet clamping device 4, upper end permanent magnetism
The cavity formed between body clamping device 4 and not magnetic conduction linear bearing 2 is placed upper end annular permanent magnet 16, on
The top open part of end permanent magnet clamping device 4 is provided with and upper end permanent magnet clamping device 4 inner thread phase
Adaptive fixes lid 3 with externally threaded upper end permanent magnet, is used for fixing upper end annular permanent magnet 16；Described
Permanent magnet fixing lid 3 in upper end is connected by the first bolt 14 with not magnetic conduction linear bearing 2, helical spring 7
Outer end is vertically disposed with by the second bolt 13 fixing upper end helical spring clamping device 5 and lower end spiral bullet
Spring clamping device 8；Upper end helical spring clamping device 5 is by the female thread of its upper end boss and upper end permanent magnet
The outer wall thread of clamping device 4 is connected；The lower end boss female thread of lower end helical spring clamping device 8
Place is fixed with externally threaded lower end permanent magnet clamping device 9, under placing in lower end permanent magnet clamping device 9
End annular permanent magnet 17, permanent magnet clamping device 9 lower end, lower end is fixed with for connecting outside by female thread
The retainingf key 10 of vibration source；The upper end boss of described upper end helical spring clamping device 5 will by the 3rd bolt 12
Upper end permanent magnet clamping device 4 is fixed, and the lower end boss of lower end helical spring clamping device 8 passes through the 4th spiral shell
Lower end permanent magnet clamping device 9 is fixed by bolt 11.
Upper end annular is regulated by knob upper end permanent magnet clamping device 4 and lower end permanent magnet clamping device 9
Permanent magnet 16 and lower end annular permanent magnet 17 relative position vertically.
Upper end permanent magnet is fixed lid 3 and retainingf key 10 at upper end permanent magnet clamping device 4 and lower end permanent magnet
Clamping device 9 precession different depth respectively regulates upper end annular permanent magnet 16 and the lower end annular permanent magnet of installation
The thickness of body 17.
Described not magnetic conduction linear bearing 2 uses metallic copper, and described vibration isolator is in addition to not magnetic conduction linear bearing 2
Remaining part uses non-magnetic metal material.
Described upper end annular permanent magnet 16 and lower end annular permanent magnet 17 are initial with intermediate annular permanent magnet 15
Mounting distance is set to 10mm.
The present invention compares with existing technology, has the advantage that
1, when along quality support bar 1 axially loaded, the helical spring 7 being connected with quality support bar 1
Elastic deformation will occur vertically.The present invention according to the characteristic of flexible member, use helical spring 7 as every
The positive rigidity resilient support members of vibrating system, helical spring has low stress and concentrates, can produce relatively vertically
Big displacement, take up room little feature.
2, use three pieces of annular permanent magnets constitute the present invention required for magnet spring and provide for this vibrating isolation system
Negative stiffness, thus reduce isolation mounting rigidity near its operating position, and then widen vibration isolation frequency band, real
Existing low frequency vibration isolation.
3, due to the introducing of permanent-magnet structure, apparatus of the present invention are made to have quickly response, noncontact, take up room
The feature such as little；Can be adjusted by turn-knob upper end permanent magnet clamping device 4 and lower end permanent magnet clamping device 9
Relative position between joint permanent magnet obtains preferable negative stiffness characteristic for system near operating position.
4, the present invention uses with the fixing lid 3 of externally threaded upper end permanent magnet with retainingf key 10, upper end is annular
Permanent magnet 16 and lower end annular permanent magnet 17 and upper end permanent magnet clamping device 4 and lower end permanent magnet clamping machine
Structure 9 is connected.Can by fixing for upper end permanent magnet lid 3 and retainingf key 10 upper end permanent magnet clamping device 4 and under
Precession different depth, i.e. scalable assemble the upper end annular of different-thickness forever in end permanent magnet clamping device 9
Magnet 16 and lower end annular permanent magnet 17.
5, all parts of the present invention all use non-magnet_conductible material, it is to avoid to causing of the magnetic field that permanent magnet produces
Interference.
6, in apparatus of the present invention, all parts all can use non-magnetic metal material；When the system is operating, will
Vortex flow can be produced in metal parts, the damping characteristic of apparatus of the present invention can be improved.
7, present configuration device, easy to use, with low cost, bearing capacity is strong, has for low-frequency vibration
There is good isolation effect.
Accompanying drawing explanation
Fig. 1 is vibration isolator assembly half sectional view of the present invention.
Fig. 2 is helical spring part drawing.
Fig. 3 is permanent magnet clamping device part drawing, wherein: Fig. 3 a is upper end permanent magnet clamping device part drawing,
Fig. 3 b is lower end permanent magnet clamping device part drawing.
Detailed description of the invention
Structural principle and operation principle to the present invention elaborate further below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 and Figure 3, a kind of standard zero using helical spring in parallel with magnet spring of the present invention
Rigidity vibration isolator, including helical spring 7, is arranged on the first annular permanent magnet in helical spring 7 central cavity
15, the permanent magnet being arranged on helical spring 7 central cavity upper end fixes lid 6；The quality of the two ends section of being threaded
The threaded one end section of support bar 1 is fixed in the screwed hole of lid 6, intermediate annular permanent magnet 15 through permanent magnet
Screwed hole of centre bottom central hole and helical spring 7 central cavity, described middle permanent magnet fixes lid 6
Screwed hole is fitted mutually with the thread segment of the screwed hole of centre bottom helical spring 7 central cavity with quality support bar 1
Join, the centre bore of described first annular permanent magnet 15 and the thread segment matched in clearance of quality support bar 1；Described
The middle non-threaded section axially arranged Constrained quality support bar 1 of quality support bar 1 makes it axially movable
Not magnetic conduction linear bearing 2, the outside of magnetic conduction linear bearing 2 is not provided with the screwed upper end of inner and outer wall
Permanent magnet clamping device 4, in the cavity formed between upper end permanent magnet clamping device 4 and not magnetic conduction linear bearing 2
Placing upper end annular permanent magnet 16, the top open part of upper end permanent magnet clamping device 4 is provided with upper end forever
What magnet clamping device 4 inner thread was suitable fixes lid 3 with externally threaded upper end permanent magnet, is used for fixing
Upper end annular permanent magnet 16；The fixing lid 3 of described upper end permanent magnet and not magnetic conduction linear bearing 2 are by the first spiral shell
Bolt 14 is connected, and the outer end of helical spring 7 is vertically disposed with by the second fixing upper end spiral bullet of bolt 13
Spring clamping device 5 and lower end helical spring clamping device 8；Upper end helical spring clamping device 5 is by its upper end
The female thread of boss is connected with the outer wall thread of upper end permanent magnet clamping device 4；Lower end helical spring folder
Hold and be fixed with at the lower end boss female thread of mechanism 8 with externally threaded lower end permanent magnet clamping device 9, lower end
Placing lower end annular permanent magnet 17 in permanent magnet clamping device 9, permanent magnet clamping device 9 lower end, lower end is passed through
Female thread is fixed with the retainingf key 10 for connecting outside vibration source；Described upper end helical spring clamping device 5
Upper end permanent magnet clamping device 4 is fixed by upper end boss by the 3rd bolt 12, lower end helical spring clamping machine
Lower end permanent magnet clamping device 9 is fixed by the lower end boss of structure 8 by the 4th bolt 11.
Upper end annular is regulated by knob upper end permanent magnet clamping device 4 and lower end permanent magnet clamping device 9
Permanent magnet 16 and lower end annular permanent magnet 17 relative position vertically.
First annular permanent magnet 15 is set in the central cavity of described helical spring 7, and is propped up by quality
Strut 1 fixes the internal and external threads of lid 6 and helical spring 7 by first annular permanent magnet 15 with middle permanent magnet
Fastening is installed and moves with helical spring 7.Described helical spring 7 is by upper end helical spring clamping machine
Structure 5 and lower end helical spring clamping device 8 clamp, by the second bolt 13 by upper end helical spring clamping machine
Structure 5 and the locking of lower end helical spring clamping device 8 make the held fastening of helical spring 7.
Preferably, the lower end of described lower end helical spring clamping device 8 by inner periphery screw thread with under
End permanent magnet clamping device 9 outer cylinder surface threaded engagement is connected, and regulates lower end annular permanent magnet 17 along axle
To position.Described lower end permanent magnet clamping device 9 is by the screw thread of inner periphery and retainingf key 10 circle
Cap external screw thread matches, and is fastened wherein by lower end annular permanent magnet 17.Described lower end helical spring clamping
Lower end helical spring clamping device 8 is pressed from both sides with lower end permanent magnet by the boss side surfaces of mechanism 8 by the 4th bolt 11
Hold mechanism 9 to tighten together.
Upper end permanent magnet is fixed lid 3 and retainingf key 10 at upper end permanent magnet clamping device 4 and lower end permanent magnet
Clamping device 9 precession different depth respectively regulates upper end annular permanent magnet 16 and the lower end annular permanent magnet of installation
The thickness of body 17.
Described not magnetic conduction linear bearing 2 uses metallic copper, and described vibration isolator is in addition to not magnetic conduction linear bearing 2
Remaining part uses non-magnetic metal material.
Preferably, described upper end annular permanent magnet 16 and lower end annular permanent magnet 17 and intermediate annular permanent magnet
The initial mounting distance of 15 is set to 10mm.
The operation principle of the present invention is: during use, is connected with controlled structure the upper end of quality support bar 1, fixing
Key 10 is connected with outside vibration source；When quality support bar 1, helical spring 7 and intermediate annular permanent magnet 15 with
When producing relative motion between upper end helical spring clamping device 5 and lower end helical spring clamping device 8, on
End annular permanent magnet 16 and lower end annular permanent magnet 17 attract the intermediate annular clamped by helical spring 7 respectively
Permanent magnet 15；Upper end annular permanent magnet 16, intermediate annular permanent magnet 15 and lower end annular permanent magnet 17 produce
Magnetic field in the non-magnetic metal structure of invention device, produce vortex flow, thus produce contrary with the direction of motion
Damping force, improve and be improved to the damping characteristic of the present invention.In apparatus of the present invention, upper end annular is forever
Magnet 16, intermediate annular permanent magnet 15 and lower end annular permanent magnet 17 constitute magnet spring, and upper end annular is forever
Magnet 16 and lower end annular permanent magnet 17 act on magnetic restoring force total on intermediate annular permanent magnet 15 and spiral shell
The restoring force that rotation spring 7 provides for intermediate annular permanent magnet 15 is in opposite direction.Therefore, magnet spring can be every
Vibrating system provides nonlinear magnetic properties restoring force and non-linear negative stiffness, exists such that it is able to reduce apparatus of the present invention
Rigidity near its operating position, widens vibration isolation frequency band, and then can isolate low-frequency vibration.
Claims (5)
1. one kind uses the quasi-zero stiffness vibration isolators that helical spring is in parallel with magnet spring, it is characterised in that: bag
Include helical spring (7), the first annular permanent magnet (15) being arranged in helical spring (7) central cavity,
It is arranged on the fixing lid (6) of permanent magnet of helical spring (7) central cavity upper end；The matter of the two ends section of being threaded
The threaded one end section of amount support bar (1) is through permanent magnet fixing the lid screwed hole of (6), intermediate annular permanent magnetism
Screwed hole of centre bottom the centre bore of body (15) and helical spring (7) central cavity, described permanent magnet
Screwed hole of centre bottom the screwed hole of fixing lid (6) and helical spring (7) central cavity supports with quality
The thread segment of bar (1) is suitable, the centre bore of described first annular permanent magnet (15) and quality support bar (1)
Thread segment matched in clearance；The middle non-threaded section axially arranged Constrained quality of described quality support bar (1)
Support bar (1) makes its not magnetic conduction linear bearing (2) axially movable, not magnetic conduction linear bearing (2)
Outside is provided with inner and outer wall screwed upper end permanent magnet clamping device (4), and upper end permanent magnet clamps
The cavity formed between mechanism (4) and not magnetic conduction linear bearing (2) is placed with upper end annular permanent magnet (16),
The top open part of upper end permanent magnet clamping device (4) is provided with interior with upper end permanent magnet clamping device (4)
What wall screw thread was suitable covers (3) with externally threaded upper end permanent magnet is fixing, is used for fixing upper end annular permanent magnet
Body (16)；Permanent magnet fixing lid (3) in described upper end passes through the first bolt (14) with not magnetic conduction linear bearing (2)
Being connected, the outer end of helical spring (7) is vertically disposed with the upper end spiral bullet fixing by the second bolt (13)
Spring clamping device (5) and lower end helical spring clamping device (8)；Upper end helical spring clamping device (5)
It is connected by the outer wall thread of the female thread of its upper end boss with upper end permanent magnet clamping device (4)；Under
It is fixed with externally threaded lower end permanent magnet at the lower end boss female thread of end helical spring clamping device (8)
Clamping device (9), places lower end annular permanent magnet (17), lower end in lower end permanent magnet clamping device (9)
Permanent magnet clamping device (9) lower end is fixed with the retainingf key (10) for connecting outside vibration source by female thread；
The upper end boss of described upper end helical spring clamping device (5) passes through the 3rd bolt (12) by upper end permanent magnet
Clamping device (4) is fixed, and the lower end boss of lower end helical spring clamping device (8) passes through the 4th bolt (11)
Lower end permanent magnet clamping device (9) is fixed.
The most according to claim 1 a kind of use the helical spring quasi-zero stiffness in parallel with magnet spring every
Shake device, it is characterised in that: by knob upper end permanent magnet clamping device (4) and lower end permanent magnet clamping device
(9) upper end annular permanent magnet (16) and lower end annular permanent magnet (17) relative position vertically is regulated.
The most according to claim 1 a kind of use the helical spring quasi-zero stiffness in parallel with magnet spring every
Shake device, it is characterised in that: fixing for upper end permanent magnet lid (3) and retainingf key (10) are pressed from both sides at upper end permanent magnet
Hold mechanism (4) and lower end permanent magnet clamping device (9) precession different depth respectively to regulate the upper end of installation
Annular permanent magnet (16) and the thickness of lower end annular permanent magnet (17).
The most according to claim 1 a kind of use the helical spring quasi-zero stiffness in parallel with magnet spring every
Shake device, it is characterised in that: described not magnetic conduction linear bearing (2) uses metallic copper, and described vibration isolator is except not leading
Magnetic linear bearing (2) remaining part outward uses non-magnetic metal material.
The most according to claim 1 a kind of use the helical spring quasi-zero stiffness in parallel with magnet spring every
Shake device, it is characterised in that: described upper end annular permanent magnet (16) and lower end annular permanent magnet (17) and the
The initial mounting distance of one annular permanent magnet (15) is set to 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097824.XA CN104747652B (en) | 2015-03-05 | 2015-03-05 | A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097824.XA CN104747652B (en) | 2015-03-05 | 2015-03-05 | A kind of quasi-zero stiffness vibration isolators using helical spring in parallel with magnet spring |
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| CN104747652A CN104747652A (en) | 2015-07-01 |
| CN104747652B true CN104747652B (en) | 2016-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139760A (en) * | 2018-09-12 | 2019-01-04 | 西安交通大学 | A kind of quasi-zero stiffness vibration isolators of positive and negative Stiffness |
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| CN105156577B (en) * | 2015-09-07 | 2017-03-29 | 西安交通大学 | A kind of employing tilting magnet produces the super damping isolator of negative stiffness |
| CN105179543B (en) * | 2015-10-08 | 2017-07-28 | 厦门艾美森新材料科技股份有限公司 | Mini magnetically damped control device and buffer air cushion machine |
| CN107654551B (en) * | 2017-10-25 | 2019-08-13 | 西安交通大学 | A kind of multiple degrees of freedom low frequency vibration isolation device based on mode of oscillation and pendulum modal coupling |
| CN108708927B (en) * | 2018-05-24 | 2019-04-30 | 上海大学 | A kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film |
| CN108662055B (en) * | 2018-07-30 | 2019-09-27 | 上海大学 | A kind of quasi-zero stiffness vibration isolators of positive and negative Stiffness |
| CN109027124B (en) * | 2018-09-12 | 2020-02-11 | 西安交通大学 | Torsion quasi-zero stiffness vibration isolator with adjustable negative stiffness and control method |
| CN113759570B (en) * | 2020-06-02 | 2023-10-31 | Oppo广东移动通信有限公司 | Nose pad assembly and glasses |
| CN111963602B (en) * | 2020-08-31 | 2021-09-21 | 合肥工业大学 | Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness |
| CN111981085B (en) * | 2020-08-31 | 2022-03-15 | 合肥工业大学 | Elasticity-hysteresis low-frequency large-displacement vibration isolator based on electromagnetic negative stiffness |
| CN113757285B (en) * | 2021-09-08 | 2022-06-21 | 重庆大学 | Negative stiffness generating mechanism and quasi-zero stiffness vibration isolator |
| CN115596795B (en) * | 2022-10-27 | 2024-06-14 | 重庆大学 | Viscous inertia damper |
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| SU750172A1 (en) * | 1977-10-06 | 1980-07-23 | Предприятие П/Я А-1923 | Non-linear shock absorber |
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