CN106382325A - Magnetorheological elastomer vibration isolator based on shearing-compression composite mode - Google Patents
Magnetorheological elastomer vibration isolator based on shearing-compression composite mode Download PDFInfo
- Publication number
- CN106382325A CN106382325A CN201610989103.4A CN201610989103A CN106382325A CN 106382325 A CN106382325 A CN 106382325A CN 201610989103 A CN201610989103 A CN 201610989103A CN 106382325 A CN106382325 A CN 106382325A
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- Prior art keywords
- vibration isolator
- support block
- spring
- pedestal
- combined pattern
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a magnetorheological elastomer vibration isolator based on a shearing-compression composite mode. The magnetorheological elastomer vibration isolator comprises a base, a vibration isolation platform, a clamping mechanism, a spring mechanism, coils, two first magnetorheological elastomers, two lamination compression structures and two sliding blocks, wherein the base is U-shaped; the opening end of the base is upward; the bottom surface of the base is fixed to a workbench; the lamination compression structures are arranged on two convex end faces of the base; the sliding blocks are L-shaped; the two sliding blocks are symmetrically arranged; one ends of the two sliding blocks are correspondingly arranged at the tops of the two lamination compression structures respectively; the other ends of the sliding blocks are oppositely arranged; one end of the vibration isolation platform is positioned between the two oppositely arranged sliding blocks; the bottom of a supporting block is fixedly connected with the base through the spring mechanism; the two first magnetorheological elastomers are arranged on the two sides of the vibration isolation platform; the first magnetorheological elastomers are in tight contact with the vibration isolation platform through the clamping mechanism; the two ends of the clamping mechanism are fixedly connected with the sliding blocks; and the coils are wound on the sliding blocks. The magnetorheological elastomer vibration isolator has the advantages that the structure is compact, the mounting is convenient, and the cost is low.
Description
Technical field
The present invention relates to vibration insulation and noise reduction equipment is and in particular to a kind of be based on magnetorheological elasticity under shearing-compression combined pattern
Body vibration isolator.
Background technology
Magnetic rheology elastic body is a new branch of magnetorheological materials, and it is by soft ferromagnetic granule and polymeric matrix
Composition, due to its response fast (ms magnitude), good reversibility（After removing magnetic field, restPose again）, can be by adjusting magnetic
Size controlling the performance consecutive variations such as the mechanics of material, electricity, magnetics, the advantage having magnetorheological materials and elastomer concurrently,
Overcome the shortcomings of magnetic flow liquid free settling, stability difference again, thus the preparation of magnetic rheology elastic body, mechanism and application in recent years
More and more paid attention to, become a focus of magnetorheological materials research.
Vibration isolation is to reduce the vibration control method of target vibration damping vibrating objects by controlling the transmission vibrated, that is, pass through
Increase vibration isolator between vibration source and target vibration damping object to reduce the vibration of target vibration damping object.From the point of view of vibration isolation way, vibration isolation
System can be divided into passive type vibration isolation, semi-active type vibration isolation and active vibration isolation.Wherein, semi-active vibration-isolating device has passively simultaneously
Formula vibration isolator and the advantage of active vibration isolation device, overcome passive type vibration isolator adaptability weak big with the power consumption of active vibration isolation device again
Shortcoming.MRE has excellent field controllable performance, can be used as the controlled member of semi-active vibration-isolating device.
At present, designed MR elastomer vibration isolator utilizes the controlled spy of shear modulus of magnetorheological elastomers mostly
Point, is allowed to be operated in shear mode, and the MRE vibration isolator based on compact model, shearing-compression mixed model is relatively fewer.Magnetic
Magnetorheological elastomer is in compression work state and can bear bigger load, and shift frequency scope is wider, and magnetic rheology elastic body
Modulus of shearing relative variation ranges are wider（Reach 188%）.
Content of the invention
It is an object of the invention to provide a kind of be based on MR elastomer vibration isolator under shearing-compression combined pattern, gram
Take that passive vibration isolation technology low frequency inhibition is poor, active vibration isolation energy expenditure is big and stability is poor, high-frequency suppressing effect is paid no attention to
The problems such as think.
The technical solution realizing the object of the invention is：One kind is based on magnetorheological elasticity under shearing-compression combined pattern
Body vibration isolator, including pedestal, vibration-isolating platform, clamp system, spring mechanism, coil, two the first magnetic rheology elastic bodies, two fold
Lamination shrinking structure and two slide blocks；Pedestal is U-shaped, and upwards, its bottom surface is fixing on the table, two projections of pedestal for opening
Lamination pressure texture is respectively equipped with end face, slide block is L-shaped, and two slide blocks are symmetrical arranged, two slide block one end respectively corresponding with
The top of two lamination pressure textures is connected, and the other end is oppositely arranged, and vibration-isolating platform one end is located at two slide blocks being oppositely arranged
Between, it is fixedly connected with the base by spring mechanism, two the first magnetic rheology elastic bodies are arranged on the both sides of vibration-isolating platform, by clamping
Mechanism makes the first magnetic rheology elastic body be in close contact with vibration-isolating platform；Clamp system two ends are connected with slide block, and two slide blocks divide
Other wound around coil.
Chute, described chute direction and two raised connecting end surfaces are respectively equipped with the raised end face of two of described pedestal
Direction is consistent, and lamination pressure texture bottom is arranged in described chute, along runner movement.
Described vibration-isolating platform includes flat board, support block and stud, and support block is arranged on flat plate bottom center, passes through
Support block and flat board are connected by stud, and two the first magnetic rheology elastic bodies are arranged on support block both sides, by clamp system
The first magnetic rheology elastic body is made to be in close contact with support block, support block bottom is fixedly connected with the base by spring mechanism.
Described clamp system includes two clamping plates, two bolts and two adjusting nuts, and described two clamping plate are respectively with two
Individual slide block is connected, and support block is located between two clamping plate, and the first magnetic rheology elastic body is located between support block and clamping plate, clamping plate two
End is arranged with the journal stirrup stretching out slide block, and journal stirrup is provided with earhole, and two bolts correspond to the ear through two clamping plates both sides respectively
Hole, is fastened by adjusting nut, and screwing adjusting nut provides pretightning force, so that the first magnetic rheology elastic body and support block is closely connect
Touch.
Described spring mechanism includes spring and two spring end caps, and both ends of the spring is separately fixed on spring terminal lid, is located at
The spring end cap at top is connected with support block bottom, and the spring end cap positioned at bottom is solid with the raised connecting end surface center of pedestal
Even.
Described clamping plate and slide block adopt the good electrical pure iron DT4A of magnetic conductivity.
Described two build up N shell pure iron thin slice and the magnetorheological elasticity of M shell second that pressure texture includes alternately bonded respectively
Body, N >=1, M=N+1.
Described pure iron thin slice adopts the good electrical pure iron DT4A of magnetic conductivity.
Described pedestal adopts the good electrical pure iron DT4A of magnetic conductivity.
Compared with prior art, its remarkable advantage is the present invention：（1）Magnetic rheology elastic body is in shearing and two kinds of compression
Mode of operation, has more given full play to the controlled performance of elastomer.
（2）Invention increases passive vibration isolation element, i.e. spring, increased the reliability of vibration isolation, high-frequency suppressing effect is more
Plus it is preferable.
（3）Magnetic structure is simple, and magnetic energy utilization rate is high.
（4）Each design of part is simple, convenient processing, cost-effective, adopts threaded, reliability is high between part more,
Easily assemble.
Brief description
Fig. 1 is that the overall structure based on MR elastomer vibration isolator under shearing-compression combined pattern of the present invention is illustrated
Figure.
Fig. 2 is clamp system and the vibration-isolating platform structural representation of the present invention, wherein schemes（a）For front view, scheme（b）For side
View.
Fig. 3 is the structural representation of the vibration-isolating platform of the present invention.
Fig. 4 is the lamination pressure texture schematic diagram of the present invention.
Implication representated by figure label is：1- pedestal, 2- builds up pressure texture, 3- slide block, 4- coil, 5- spring, and 6
One screw, 7- clamp system, 8- first magnetic rheology elastic body, 9- vibration-isolating platform, 10 first bolts, 11 first nuts, 12- spring
End cap, 13- clamping plate, 14- second bolt, 15- second screw, 16 adjusting nuts, 17- support block, 18- flat board, 19- second spiral shell
Mother, 20- stud, 21- second magnetic rheology elastic body, 22- pure iron thin slice.
Specific embodiment
With reference to embodiment, the present invention will be further described：
In conjunction with Fig. 1, one kind of the present invention is based on MR elastomer vibration isolator under shearing-compression combined pattern, including pedestal 1,
Vibration-isolating platform 9, clamp system 7, spring mechanism, coil 8, two lamination pressure texture 2 and of 4, two the first magnetic rheology elastic bodies
Two slide blocks 3.Pedestal 1 is U-shaped, and upwards, its bottom surface is fixing on the table for opening, and two raised end faces of pedestal 1 divide
It is not provided with lamination pressure texture 2, the chute bottom surface of pedestal 1 is close in lamination pressure texture 2 bottom surface, lamination pressure texture 2 side wall is slided
1mm space is left, beneficial to slip between groove sidewall.Slide block 3 is L-shaped, and two slide blocks 3 are symmetrical arranged, and two slide block 3 one end are respectively
Be correspondingly arranged at the top of two lamination pressure textures 2, the other end is oppositely arranged, and slide block 3 and lamination pressure texture 2 transversal
Face is identical, both overlap face pass through glue be connected.Vibration-isolating platform 9 one end is located between two slide blocks 3 being oppositely arranged, and leads to
Cross spring mechanism to be connected with pedestal 1, two the first magnetic rheology elastic bodies 8 are arranged on the both sides of vibration-isolating platform 9, by clamp system
7 make the first magnetic rheology elastic body 8 and vibration-isolating platform 9 be in close contact, and it is solid that clamp system 7 two ends and slide block 3 pass through the second screw 15
Even, difference wound around coil 4 on two slide blocks 3, the safe carrying capacity of coil 4 is 10A, and diameter is chosen as 1.2mm, and the number of turn is
650, the electric current being passed through coil 4 is provided by controlled DC source, and its output voltage amplitude, frequency and the equal scalable of phase place, thus control
Magnetic field intensity processed.First magnetic rheology elastic body 8 is used for bearing shearing force, and spring mechanism is used for bearing compression stress.
Spring mechanism includes spring 5 and two spring end caps 12, and spring 5 two ends are separately fixed on spring end cap 12, position
Spring end cap 12 in top is connected by the first screw 6 with support block 17 bottom, positioned at spring end cap 12 and the pedestal 1 of bottom
Raised connecting end surface be connected centrally through the first bolt 10, and screwed with the first nut 11.Spring mechanism increased to be based on and cuts
Cut-compression combined pattern under MR elastomer vibration isolator reliability, simultaneously spring 5 play position-limiting action, make slide block 3 and every
The platform 9 that shakes vibrates within the specific limits.
As shown in Fig. 2 clamp system 7 includes 13, two bolts 14 of two clamping plates and two adjusting nuts 16, two clamping plates
13 are respectively provided with 4 counter sinks, differ 90 ° of annular spread two-by-two, and four the second screws 15 pass through four counter sinks by clamping plate 13
It is connected with slide block 3.Support block 17 is located between two clamping plate 13, and the first magnetic rheology elastic body 8 is located at support block 17 and clamping plate 13
Between, clamping plate 13 two ends are arranged with the journal stirrup stretching out slide block 3, and journal stirrup is provided with earhole, two bolts 14 correspond to respectively through
The earhole of two clamping plates 13 both sides, is fastened by adjusting nut 16, and screwing adjusting nut 16 provides pretightning force, makes first magnetorheological
Elastomer 8 is in close contact with support block 17.The size of the first magnetic rheology elastic body 8 is not more than the size of clamping plate 13.
As shown in figure 3, vibration-isolating platform 9 includes flat board 18, support block 17 and stud 20, support block 17 is arranged on flat board
18 bottom centre, flat board 18 center has Φ 9 through hole, is stretched into by stud 20 self-supporting block 17 top, by support block 17
It is connected with flat board 18, and is screwed with the second nut 19, vibration isolation object is enclosed within stud 20 top.
Fig. 4 is the schematic diagram building up pressure texture 2 in the present invention, builds up the N shell pure iron that pressure texture 2 includes alternately bonded
Thin slice 21 and M shell the second magnetic rheology elastic body 22, M=N+1,（With N=2, as a example M=3）Pure iron thin slice 21 is square, the second magnetic
Magnetorheological elastomer 22 is cube, and pure iron thin slice 21 is identical with the coincidence face of the second magnetic rheology elastic body 22, is used for bearing
Compression stress.Of the present invention build up the stratified energy mechanism that traditional laminated rubber bases used for reference by pressure texture 2, advantage exists
In the load that can bear larger vertical direction, and the intensity of magnetic flux can be improved by replacing bonding pure iron material.Energising
The change of coil 4 electric current along with the change of magnetic field intensity, build up pressure texture 2 and shearing magnetic rheology elastic body 8 modulus and
Damping all changes, so that the frequency of vibrating isolation system changes, that is, the phenomenon of shift frequency, so that system frequency is inclined
From resonant frequency area, reach the effect of vibration isolation.
Described pedestal 1, pure iron thin slice 21, clamping plate 13 and slide block 3 all using the electrical pure iron DT4A that magnetic conductivity is good, they
Collectively form toroid with the first magnetic rheology elastic body 8, the second magnetic rheology elastic body 22.
Work process：Pedestal 1 is connected on work platformses, and vibration-isolating platform 9 and vibration isolation object are connected and with its vibration, vibration
During the first magnetic rheology elastic body 8 bear shearing force, spring 5 and build up pressure texture 2 and bear compression stress, coil 4 given by spring 5
After providing a certain size direct current signal, the rigidity of the first magnetic rheology elastic body 8 and lamination pressure texture 2 and damping all change
Becoming, so that the natural frequency of system is changed, thus avoiding the exciting signal frequency resonance region on vibration-isolating platform, playing vibration isolation fall
The effect made an uproar.
From the foregoing, it will be observed that the present invention's is simple based on MR elastomer vibration isolator structure under shearing-compression combined pattern, every
Controllability of shaking is good, can be widely applied to engine vibration isolation, the vibration insulation and noise reduction occasion such as precision instrument vibration isolation.
Claims (9)
1. one kind is based on MR elastomer vibration isolator under shearing-compression combined pattern it is characterised in that including pedestal（1）, every
Shake platform（9）, clamp system（7）, spring mechanism, coil（4）, two the first magnetic rheology elastic bodies（8）, two lamination compression knots
Structure（2）With two slide blocks（3）；Pedestal（1）For U-shaped, upwards, its bottom surface is fixing on the table, pedestal for opening（1）Two
Lamination pressure texture is respectively equipped with raised end face（2）, slide block（3）For L-shaped, two slide blocks（3）It is symmetrical arranged, two slide blocks
（3）One end corresponds to and two lamination pressure textures respectively（2）Top be connected, the other end is oppositely arranged, vibration-isolating platform（9）One end
It is located at two slide blocks being oppositely arranged（3）Between, by spring mechanism and pedestal（1）It is connected, two the first magnetic rheology elastic bodies
（8）It is arranged on vibration-isolating platform（9）Both sides, by clamp system（7）Make the first magnetic rheology elastic body（8）With vibration-isolating platform（9）
It is in close contact；Clamp system（7）Two ends and slide block（3）It is connected, two slide blocks（3）Upper wound around coil respectively（4）.
2. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described pedestal（1）Two raised end faces on be respectively equipped with chute, the side of described chute direction and two raised connecting end surfaces
To consistent, lamination pressure texture（2）Bottom is arranged in described chute, along runner movement.
3. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described vibration-isolating platform（9）Including flat board（18）, support block（17）And stud（20）, support block（17）It is arranged on flat
Plate（18）Bottom centre, by stud（20）By support block（17）And flat board（18）It is connected, two the first magnetorheological elasticity
Body（8）It is arranged on support block（17）Both sides, by clamp system（7）Make the first magnetic rheology elastic body（8）With support block（17）Tightly
Contiguity is touched, support block（17）Spring mechanism and pedestal are passed through in bottom（1）It is connected.
4. according to claim 3 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described clamp system（7）Including two clamping plates（13）, two bolts（14）With two adjusting nuts（16）, described two folders
Plate（13）Respectively with two slide blocks（3）It is connected, support block（17）Positioned at two clamping plate（13）Between, the first magnetic rheology elastic body
（8）Positioned at support block（17）And clamping plate（13）Between, clamping plate（13）Two ends are arranged with stretches out slide block（3）Journal stirrup, on journal stirrup
It is provided with earhole, two bolts（14）Correspond to through two clamping plates respectively（13）The earhole of both sides, by adjusting nut（16）Fastening,
Screw adjusting nut（16）Pretightning force is provided, makes the first magnetic rheology elastic body（8）With support block（17）It is in close contact.
5. according to claim 3 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described spring mechanism includes spring（5）With two spring end caps（12）, spring（5）Two ends are separately fixed at spring end cap
（12）On, positioned at the spring end cap at top（12）With support block（17）Bottom is connected, positioned at the spring end cap of bottom（12）With base
Seat（1）Raised connecting end surface center be connected.
6. according to claim 3 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described clamping plate（13）And slide block（3）Using the good electrical pure iron DT4A of magnetic conductivity.
7. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described two build up pressure texture（2）Include the N shell pure iron thin slice of alternately bonded respectively（21）The magnetorheological bullet with M shell second
Gonosome（22）, N >=1, M=N+1.
8. according to claim 7 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described pure iron thin slice（21）Using the good electrical pure iron DT4A of magnetic conductivity.
9. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, its feature exists
In：Described pedestal（1）Using the good electrical pure iron DT4A of magnetic conductivity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610989103.4A CN106382325B (en) | 2016-11-10 | 2016-11-10 | Based on MR elastomer vibration isolator under shearing-compression combined pattern |
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|---|---|---|---|
| CN201610989103.4A CN106382325B (en) | 2016-11-10 | 2016-11-10 | Based on MR elastomer vibration isolator under shearing-compression combined pattern |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708930A (en) * | 2018-07-20 | 2018-10-26 | 南京理工大学 | Magnetic rheology elastic body pipe shock absorptor |
| CN112303174A (en) * | 2020-10-30 | 2021-02-02 | 广州大学 | Semi-active control vibration isolator based on magnetorheological elastomer and control method thereof |
| CN113740150A (en) * | 2021-09-22 | 2021-12-03 | 哈尔滨工业大学 | Pretension adjustable magnetorheological elastomer shearing dynamic and static mechanics testing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108708930B (en) * | 2018-07-20 | 2023-10-31 | 南京理工大学 | Magnetorheological elastomer pipeline damper |
| CN112303174A (en) * | 2020-10-30 | 2021-02-02 | 广州大学 | Semi-active control vibration isolator based on magnetorheological elastomer and control method thereof |
| CN113740150A (en) * | 2021-09-22 | 2021-12-03 | 哈尔滨工业大学 | Pretension adjustable magnetorheological elastomer shearing dynamic and static mechanics testing device |
| CN113740150B (en) * | 2021-09-22 | 2024-03-29 | 哈尔滨工业大学 | Magnetorheological elastomer shearing dynamic and static mechanical testing device with adjustable pre-tightening |
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| CN106382325B (en) | 2018-07-31 |
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