CN106382325B - Based on MR elastomer vibration isolator under shearing-compression combined pattern - Google Patents
Based on MR elastomer vibration isolator under shearing-compression combined pattern Download PDFInfo
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- CN106382325B CN106382325B CN201610989103.4A CN201610989103A CN106382325B CN 106382325 B CN106382325 B CN 106382325B CN 201610989103 A CN201610989103 A CN 201610989103A CN 106382325 B CN106382325 B CN 106382325B
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- vibration
- supporting block
- pedestal
- vibration isolator
- rheology elastic
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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 one kind based on MR elastomer vibration isolator under the compression combined pattern of shearing, including pedestal, vibration-isolating platform, clamp system, spring mechanism, coil, two the first magnetic rheology elastic bodies, two lamination pressure textures and two sliding blocks；Pedestal is U-shaped, open end is upward, its bottom surface is fixed on the table, two of pedestal are respectively equipped with lamination pressure texture on raised end face, sliding block is L-shaped, two sliding blocks are symmetrical arranged, two sliding block one end are correspondingly arranged at the top of two lamination pressure textures respectively, the other end is oppositely arranged, vibration-isolating platform one end is located between two sliding blocks being oppositely arranged, it is fixedly connected with the base by spring mechanism, two the first magnetic rheology elastic bodies are arranged in the both sides of vibration-isolating platform, so that the first magnetic rheology elastic body is in close contact with vibration-isolating platform by clamp system；Clamp system both ends are connected with sliding block, and wound around coil is distinguished on two sliding blocks.The present invention has many advantages, such as compact-sized, easy for installation, at low cost.
Description
Technical field
The present invention relates to vibration insulation and noise reduction equipment, and in particular to one kind is 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, it is by soft ferromagnetic particle and polymeric matrix
Composition, due to its response fast (ms magnitudes), good reversibility（After removing magnetic field, and restPose）, can be by adjusting magnetic
Size is come performances consecutive variations such as the mechanics, electricity, the magnetics that control material, the advantages of having magnetorheological materials and elastomer concurrently,
Magnetorheological fluid free settling is overcome again, the shortcomings of stability is poor, thus the preparation of magnetic rheology elastic body, mechanism and application in recent years
More and more paid attention to, becomes a hot spot of magnetorheological materials research.
Vibration isolation is to reduce the vibration control method of target vibration damping vibrating objects by controlling the transmission of vibration, i.e., by
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 passive simultaneously
The advantages of formula vibration isolator and active vibration isolation device, but it is weak big with the energy consumption of active vibration isolation device to overcome passive type vibration isolator adaptability
The shortcomings that.MRE has excellent field controllable performance, can be as the controlled member of semi-active vibration-isolating device.
Currently, the spy that designed MR elastomer vibration isolator utilizes shear modulus of magnetorheological elastomers controllable mostly
Point is allowed to be operated in shear mode, and the MRE vibration isolators based on compact model, shearing-compression mixed mode are relatively fewer.Magnetic
Magnetorheological elastomer, which is in compression work state, can bear the load of bigger, and shift frequency range is wider, and magnetic rheology elastic body
Modulus of shearing relative variation ranges are wider（Up to 188%）.
Invention content
The purpose of the present invention is to provide one kind being 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 thinking.
Realize that the technical solution of 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 it is folded
It is laminated shrinking structure and two sliding blocks；Pedestal is U-shaped, and open end is upward, and bottom surface is fixed on the table, two protrusions of pedestal
Be respectively equipped with lamination pressure texture on end face, sliding block is L-shaped, and two sliding blocks are symmetrical arranged, two sliding block one end respectively it is 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 sliding blocks being oppositely arranged
Between, it is fixedly connected with the base by spring mechanism, two the first magnetic rheology elastic bodies are arranged in the both sides of vibration-isolating platform, pass through clamping
Mechanism makes the first magnetic rheology elastic body be in close contact with vibration-isolating platform；Clamp system both ends are connected with sliding block, divide on two sliding blocks
Other wound around coil.
It is respectively equipped with sliding slot on two of the pedestal raised end faces, the sliding slot direction and two raised connecting end surfaces
Direction is consistent, and lamination pressure texture bottom is arranged in the sliding slot, along runner movement.
The vibration-isolating platform includes tablet, supporting block and stud, and supporting block is arranged at flat plate bottom center, passes through
Supporting block and tablet are connected by stud, and two the first magnetic rheology elastic bodies are arranged in supporting block both sides, pass through clamp system
The first magnetic rheology elastic body is set to be in close contact with supporting block, supporting block bottom is fixedly connected with the base by spring mechanism.
The clamp system includes two clamping plates, two bolts and two adjusting nuts, and described two clamping plates are respectively with two
A sliding block is connected, and supporting block is located between two clamping plates, and the first magnetic rheology elastic body is between supporting block and clamping plate, clamping plate two
End is arranged with the journal stirrup for stretching out sliding block, and journal stirrup is equipped with earhole, and two bolts correspond to the ear across two clamping plates both sides respectively
Hole is fastened by adjusting nut, is screwed adjusting nut and is provided pretightning force, the first magnetic rheology elastic body is made closely to be connect with supporting block
It touches.
The spring mechanism includes spring and two spring end caps, and both ends of the spring is separately fixed at spring terminal and covers, is located at
The spring end cap at top is connected with supporting block bottom, and the raised connecting end surface center of the spring end cap and pedestal that are located at bottom is solid
Even.
The clamping plate and sliding block use the good electrical pure iron DT4A of magnetic conductivity.
Described two the second magnetorheological elasticity of N layer pure iron thin slices and M layers for building up pressure texture and respectively including alternately bonded
Body, N >=1, M=N+1.
The pure iron thin slice uses the good electrical pure iron DT4A of magnetic conductivity.
The pedestal uses the good electrical pure iron DT4A of magnetic conductivity.
Compared with prior art, the present invention its remarkable advantage is：（1）Magnetic rheology elastic body is in two kinds of shearing and compression
Operating mode has more given full play to the controlled performance of elastomer.
（2）Invention increases passive vibration isolation elements, i.e. spring, increase the reliability of vibration isolation, high-frequency suppressing effect is more
Add ideal.
（3）Magnetic structure is simple, and magnetic energy utilization rate is high.
（4）Each design of part is simple, facilitates processing, cost-effective, and threaded connection is mostly used between part, and reliability is high,
It is easy assembly.
Description of the drawings
Fig. 1 is the overall structure signal based on MR elastomer vibration isolator under shearing-compression combined pattern of the present invention
Figure.
Fig. 2 is the clamp system and vibration-isolating platform structural schematic diagram of the present invention, wherein scheming（a）For front view, figure（b）For side
View.
Fig. 3 is the structural schematic diagram of the vibration-isolating platform of the present invention.
Fig. 4 is the lamination pressure texture schematic diagram of the present invention.
Meaning representated by figure label is：1- pedestals, 2- build up pressure texture, 3- sliding blocks, 4- coils, 5- springs, and 6
One screw, 7- clamp systems, the first magnetic rheology elastic bodies of 8-, 9- vibration-isolating platforms, 10 first bolts, 11 first nuts, 12- springs
End cap, 13- clamping plates, the second bolts of 14-, the second screws of 15-, 16 adjusting nuts, 17- supporting blocks, 18- tablets, the second spiral shells of 19-
Mother, 20- studs, the second magnetic rheology elastic bodies of 21-, 22- pure iron thin slices.
Specific implementation mode
With reference to embodiment, the present invention will be further described：
In conjunction with Fig. 1, one kind of the invention is based on MR elastomer vibration isolator under shearing-compression combined pattern, including base
Seat 1, vibration-isolating platform 9, clamp system 7, spring mechanism, coil 4, two the first magnetic rheology elastic bodies, 8, two lamination pressure textures
2 and two sliding blocks 3.Pedestal 1 is U-shaped, and open end is upward, and bottom surface is fixed on the table, on two raised end faces of pedestal 1
It is respectively equipped with lamination pressure texture 2, the sliding slot bottom surface of pedestal 1,2 side wall of lamination pressure texture are close in 2 bottom surface of lamination pressure texture
There are the gaps 1mm between chute wall, are conducive to sliding.Sliding block 3 is L-shaped, and two sliding blocks 3 are symmetrical arranged, two 3 one end of sliding block point
It is not correspondingly arranged at the top of two lamination pressure textures 2, the other end is oppositely arranged, and sliding block 3 and lamination pressure texture 2 are horizontal
Section is identical, and the two coincidence face is connected by glue.9 one end of vibration-isolating platform is located between two sliding blocks 3 being oppositely arranged,
It is connected by spring mechanism and pedestal 1, two the first magnetic rheology elastic bodies 8 are arranged in the both sides of vibration-isolating platform 9, pass through clamping machine
Structure 7 makes the first magnetic rheology elastic body 8 be in close contact with vibration-isolating platform 9, and 7 both ends of clamp system pass through the second screw 15 with sliding block 3
It is connected, wound around coil 4 is distinguished on two sliding blocks 3, the safe carrying capacity of coil 4 is 10A, and diameter is selected as 1.2mm, and the number of turns is
650, the electric current for being passed through coil 4 is provided by controllable DC source, and output voltage amplitude, frequency and phase are adjustable, to control
Magnetic field intensity processed.First magnetic rheology elastic body 8 is for bearing shearing force, and spring mechanism is for bearing compressing force.
Spring mechanism includes spring 5 and two spring end caps 12, and 5 both ends of spring are separately fixed on spring end cap 12, position
Spring end cap 12 in top is connected with 17 bottom of supporting block by the first screw 6, and the spring end cap 12 and pedestal 1 of bottom are located at
Raised connecting end surface centrally through the first bolt 10 be connected, be used in combination the first nut 11 to screw.Spring mechanism, which increases, to be based on cutting
Cut-compression combined pattern under MR elastomer vibration isolator reliability, while spring 5 plays position-limiting action, make sliding block 3 and every
The platform 9 that shakes vibrates in a certain range.
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 spreads two-by-two, four the second screws 15 are by four counter sinks by clamping plate 13
It is connected with sliding block 3.Supporting block 17 is located between two clamping plates 13, and the first magnetic rheology elastic body 8 is located at supporting block 17 and clamping plate 13
Between, 13 both ends of clamping plate be arranged with stretch out sliding block 3 journal stirrup, journal stirrup be equipped with earhole, two bolts 14 respectively correspond to across
The earhole of 13 both sides of two clamping plates, is fastened by adjusting nut 16, is screwed adjusting nut 16 and is provided pretightning force, makes first magnetorheological
Elastomer 8 is in close contact with supporting block 17.The size of 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 tablet 18, supporting block 17 and stud 20, supporting block 17 is arranged in tablet
18 bottom centre, 18 center of tablet are provided with 9 through-holes of Φ, are stretched by 20 self-supporting block of stud, 17 top, by supporting block 17
It is connected with tablet 18, the second nut 19 is used in combination to screw, vibration isolation object is sleeved on 20 top of stud.
Fig. 4 is the schematic diagram that pressure texture 2 is built up in the present invention, builds up the N layer pure iron that pressure texture 2 includes alternately bonded
Thin slice 21 and M layer the second magnetic rheology elastic body 22, M=N+1,（With N=2, for 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, for bearing
Compressing force.The stratified energy mechanism of the present invention for building up pressure texture 2 and having used for reference traditional laminated rubber bases, advantage exist
The intensity of magnetic flux can be improved in the load that can bear larger vertical direction, and by being alternately bonded pure iron material.It is powered
The change of 4 electric current of coil along with magnetic field intensity change, build up pressure texture 2 and shear magnetic rheology elastic body 8 modulus and
Damping all changes, and to make the frequency of vibrating isolation system change, that is, the phenomenon that shift frequency occurs, to keep system frequency inclined
From resonant frequency area, the effect of vibration isolation is reached.
The pedestal 1, pure iron thin slice 21, clamping plate 13 and sliding block 3 are all made of the good electrical pure iron DT4A of magnetic conductivity, they
Toroid is collectively formed with the first magnetic rheology elastic body 8, the second magnetic rheology elastic body 22.
The course of work：Pedestal 1 is connected on workbench, and vibration-isolating platform 9 and vibration isolation object are connected and with its vibration, vibration
The first magnetic rheology elastic body 8 bears shearing force in the process, and spring 5 bears compressing force with pressure texture 2 is built up, and spring 5 gives coil 4
After the direct current signal for providing a certain size, the rigidity and damping of the first magnetic rheology elastic body 8 and lamination pressure texture 2 all change
Become, the intrinsic frequency of system is made to change, to avoid the exciting signal frequency resonance region on vibration-isolating platform, plays vibration isolation drop
The effect made an uproar.
From the foregoing, it will be observed that the present invention's is simple in structure based on MR elastomer vibration isolator under shearing-compression combined pattern, every
Controllability of shaking is good, can be widely applied to engine vibration isolation, the vibration insulation and noise reductions occasion such as precision instrument vibration isolation.
Claims (8)
1. one kind is based on MR elastomer vibration isolator under shearing-compression combined pattern, which is characterized 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) and two sliding blocks (3)；Pedestal (1) is U-shaped, and open end is upward, and bottom surface is fixed on the table, two of pedestal (1)
Lamination pressure texture (2) is respectively equipped on raised end face, sliding block (3) is L-shaped, and two sliding blocks (3) are symmetrical arranged, two sliding blocks
(3) the corresponding top with two lamination pressure textures (2) is connected respectively for one end, and the other end is oppositely arranged, vibration-isolating platform (9) one end
Between two sliding blocks (3) being oppositely arranged, it is connected by spring mechanism and pedestal (1), two the first magnetic rheology elastic bodies
(8) it is arranged in the both sides of vibration-isolating platform (9), the first magnetic rheology elastic body (8) and vibration-isolating platform (9) is made by clamp system (7)
It is in close contact；Clamp system (7) both ends are connected with sliding block (3), and wound around coil (4) is distinguished on two sliding blocks (3)；The pedestal
(1) sliding slot is respectively equipped on the raised end face of two, the sliding slot direction is consistent with two raised directions of connecting end surface, lamination
Pressure texture (2) bottom is arranged in the sliding slot, along runner movement.
2. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The vibration-isolating platform (9) includes tablet (18), supporting block (17) and stud (20), and supporting block (17) setting is flat
Supporting block (17) and tablet (18) are connected by plate (18) bottom centre by stud (20), two the first magnetorheological elasticity
Body (8) setting keeps the first magnetic rheology elastic body (8) tight with supporting block (17) in supporting block (17) both sides, by clamp system (7)
Contiguity is touched, and supporting block (17) bottom is connected by spring mechanism and pedestal (1).
3. according to claim 2 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The clamp system (7) includes two clamping plates (13), two bolts (14) and two adjusting nuts (16), described two folders
Plate (13) is connected with two sliding blocks (3) respectively, and supporting block (17) is located between two clamping plates (13), the first magnetic rheology elastic body
(8) between supporting block (17) and clamping plate (13), clamping plate (13) both ends are arranged with the journal stirrup for stretching out sliding block (3), on journal stirrup
Equipped with earhole, two bolts (14) correspond to the earhole across two clamping plates (13) both sides respectively, are fastened by adjusting nut (16),
It screws adjusting nut (16) and pretightning force is provided, the first magnetic rheology elastic body (8) is made to be in close contact with supporting block (17).
4. according to claim 2 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The spring mechanism includes spring (5) and two spring end caps (12), and spring (5) both ends are separately fixed at spring end cap
(12) on, the spring end cap (12) and supporting block (17) bottom that are located at top are connected, and are located at the spring end cap (12) and base of bottom
The raised connecting end surface center of seat (1) is connected.
5. according to claim 3 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The clamping plate (13) and sliding block (3) use the good electrical pure iron DT4A of magnetic conductivity.
6. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：Described two the second magnetorheological bullets of N layer pure iron thin slices (21) and M layers for building up pressure texture (2) and respectively including alternately bonded
Property body (22), N >=1, M=N+1.
7. according to claim 6 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The pure iron thin slice (21) uses the good electrical pure iron DT4A of magnetic conductivity.
8. according to claim 1 based on MR elastomer vibration isolator under shearing-compression combined pattern, feature exists
In：The pedestal (1) uses the good electrical pure iron DT4A of magnetic conductivity.
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| Application Number | Priority Date | Filing Date | Title |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708930B (en) * | 2018-07-20 | 2023-10-31 | 南京理工大学 | Magnetorheological elastomer pipeline damper |
| CN112303174B (en) * | 2020-10-30 | 2022-03-22 | 广州大学 | Semi-active control vibration isolator based on magnetorheological elastomer and control method thereof |
| 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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| DE19717692A1 (en) * | 1997-04-26 | 1998-10-29 | Schenck Ag Carl | Spring mass vibration force coupler |
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| FR2991418B1 (en) * | 2012-05-31 | 2020-02-07 | Korea Institute Of Machinery & Materials | ACTIVE CONTROLLED TYPE OF VIBRATION ABSORBING DEVICE |
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| DE19717692A1 (en) * | 1997-04-26 | 1998-10-29 | Schenck Ag Carl | Spring mass vibration force coupler |
| CN201982575U (en) * | 2011-04-19 | 2011-09-21 | 宁波大学 | Variable-rigidity vibration isolator |
| CN104632985A (en) * | 2014-12-10 | 2015-05-20 | 兰州大学 | Passive compression type self-adaption vibration damper |
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