CN114776753B - Rotary type linear vibration damping magnetorheological fluid damper - Google Patents
Rotary type linear vibration damping magnetorheological fluid damper Download PDFInfo
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- CN114776753B CN114776753B CN202210236027.5A CN202210236027A CN114776753B CN 114776753 B CN114776753 B CN 114776753B CN 202210236027 A CN202210236027 A CN 202210236027A CN 114776753 B CN114776753 B CN 114776753B
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- magnetic frame
- inertia disc
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- 238000013016 damping Methods 0.000 title claims abstract description 81
- 239000012530 fluid Substances 0.000 title claims abstract description 25
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 239000006096 absorbing agent Substances 0.000 description 11
- 230000035939 shock Effects 0.000 description 9
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a rotary type linear vibration damping magnetorheological fluid damper, which comprises an upper end cover, a sleeve, a lower end cover, a rotating shaft, an inertia disc, an upper ring permanent magnet and a lower ring permanent magnet, wherein the upper end cover is provided with a first ring permanent magnet; the rotating shaft is an arc groove shaft, an arc groove is formed in the rotating shaft, and the inertia disc is connected with the rotating shaft through the arc groove and the plunger. The upper end cover is fixed with the upper magnetic frame, and the upper ring permanent magnet is fixed in the upper magnetic frame; the lower end cover is fixed with the lower magnetic frame, and the lower ring permanent magnet is fixed in the lower magnetic frame; an excitation coil is arranged in the sleeve; a first damping gap is formed between the inertia disc and the upper magnetic frame; a third damping gap is formed between the lower magnetic frame and the lower magnetic frame; a second damping gap is formed with the sleeve. The invention has simple structure, and can realize damping effect by adjusting the magnetic field according to the actual vibration size through the three damping gaps.
Description
Technical Field
The invention relates to the technical field of vibration dampers, in particular to a rotary linear vibration damping magnetorheological damper.
Background
Magnetorheological materials are called intelligent materials, and the intelligent materials are materials which can change rheological properties such as viscosity, plasticity, viscoelasticity and the like of the intelligent materials rapidly under the condition of an externally applied magnetic field, and comprise magnetorheological fluid, magnetorheological grease, magnetorheological elastomer and the like. The magnetorheological fluid is a suspension formed by mixing micron-sized soft magnetic particles with low coercivity, carrier fluid with low permeability and additives added for preventing sedimentation of the magnetic particles, the material shows a Newtonian fluid form with low viscosity and high fluidity under the condition of zero field, can be quickly converted into a semisolid form with high viscosity and low fluidity under the action of an externally applied magnetic field, and can be quickly converted back into the original Newtonian fluid form when the magnetic field is removed. Because of the rapid and reversible rheological property of the magnetorheological material, the magnetorheological material provides possibility for the future application of the magnetorheological material in engineering machinery, intelligent robots, medical treatment, aerospace and other industries.
In recent years, the application of magneto-rheological materials in engineering is gradually paid attention to in China, and practical application of magneto-rheological materials is explored by various universities and institutions, and damping vibration absorbers, coupling and the like are mature at present. Damping vibration dampers can be largely classified into two types according to the type of object-oriented vibration: one is a rotary damping shock absorber, mainly facing a rotary device like a shaft; one is a straight tube type damping shock absorber, which mainly faces a straight line vibration device similar to a suspension. However, the existing straight cylinder type damping shock absorber needs to leave a large amount of space in the axial direction due to engineering application requirements, and for some special engineering machinery, the working space is smaller, and the direct installation of the straight cylinder type damping shock absorber is difficult; the straight cylinder type damping shock absorber needs to be added with a large amount of magnetorheological fluid in a cylinder due to the working principle and mode of the straight cylinder type damping shock absorber; secondly, if the damping vibration absorber is of a single rod type, a volume compensation device is additionally arranged in the cylinder; in addition, the working area of the straight cylinder type damping shock absorber is only a circle of circular ring between the piston and the cylinder body during working, the utilization rate of magnetorheological fluid at two ends of the piston is low, and the working performance of the straight cylinder type damping shock absorber is influenced due to the fact that sedimentation is easy to occur after long-term placement under the condition that no permanent magnet is arranged. Aiming at a series of problems faced by the traditional straight-tube type damping shock absorber, the invention designs a rotary type linear damping magneto-rheological damper.
Disclosure of Invention
Based on the problems, the invention provides the rotary type linear vibration damping magnetorheological fluid damper which is designed according to the rheological property of the magnetorheological material and the cylindrical cam principle, and compared with the traditional straight cylinder type damper, the rotary type linear vibration damping magnetorheological fluid damper has the advantages that the required axial space is smaller, the permanent magnet is built in the damper without worrying about sedimentation of the magnetorheological material, the generated damping force is larger, and the utilization rate of the magnetorheological material is higher.
The adopted technical scheme is as follows: a rotary linear vibration damping magnetorheological fluid damper comprises an upper end cover, a sleeve, a lower end cover, a rotating shaft, an inertia disc, an upper ring permanent magnet and a lower ring permanent magnet.
The upper end cover is fixed above the sleeve through a bolt, the lower end cover is fixed below the sleeve through a bolt to form a sealed cavity, and an inertia disc is arranged in the cavity; bearings are arranged in the bearing holes of the upper cover end and the lower cover and are respectively fixed by an upper bearing cover and a lower bearing cover, and the bearings are in transition fit with the rotating shaft; the outer side of the rotating shaft is fixed with a connecting sleeve.
An upper magnetic frame is fixed on the upper end cover through bolts, and an upper ring permanent magnet is fixed in a groove of the upper magnetic frame; the upper end cover is also provided with a first liquid injection hole; the upper magnetic frame is provided with a second liquid injection hole; the first liquid injection hole is communicated with the second liquid injection hole.
A lower magnetic frame is fixed on the lower end cover through bolts, and a lower ring permanent magnet is fixed in a groove of the lower magnetic frame;
the sleeve is internally fixed with exciting coils, namely an upper exciting coil fixed at the upper part and a lower exciting coil fixed at the lower part; the upper exciting coil and the upper ring permanent magnet are on the same horizontal line; the lower exciting coil and the lower ring permanent magnet are on the same horizontal line.
The upper end of the inertia disc is concave, is matched with the upper magnetic frame and has a gap between the upper magnetic frame and the upper magnetic frame, and is a first damping gap;
the lower end of the inertia disc is convex, is matched with the lower magnetic frame and has a gap between the lower magnetic frame and the lower magnetic frame, and is a third damping gap;
a gap is formed between one side of the inertia disc and the sleeve, and is a second damping gap;
The other side of the inertia disc is embedded into the connecting sleeve and is fixed with the connecting sleeve;
The first damping gap, the second damping gap and the third damping gap are communicated; the magnetorheological fluid fills the first damping gap, the second damping gap and the third damping gap with the magnetorheological fluid through the first liquid injection hole and the second liquid injection hole.
Further, the rotating shaft is an arc groove shaft.
Further, three arc grooves are formed in the rotating shaft.
Further, a column hole is formed in the connecting sleeve, the connecting sleeve is meshed with the rotating shaft, and the connecting sleeve is fixed with an arc-shaped groove in the rotating shaft through a plunger in the column hole.
Further, the center of the connecting sleeve is cylindrical, and three cylindrical convex keys are uniformly fixed outside the circular shape.
The invention has simple structure, when in use, the rotating shaft is axially connected with the vibration object, the placement mode of the damper is determined according to the vibration amplitude of the vibration object, if the vibration amplitude is smaller, the distance between the rotating shaft and the end face of the lower end cover can be adjusted, and the damper is placed on a fixed plane; if the vibration amplitude is larger, an axial space is reserved for the rotating shaft when the damper is placed, and the damper is fixed through the fixing sleeve.
When vibration is damped, vibration is firstly transmitted to the rotating shaft, the rotating shaft axially displaces, and at the moment, the plunger meshed with the arc-shaped groove of the rotating shaft rotates to drive the inertia disc connected with the connecting sleeve in an embedded mode to rotate, so that linear vibration is converted into rotary motion.
When the vibration force is smaller, damping generated by the first damping gap and the third damping gap can be damped only through the upper annular permanent magnet and the lower annular permanent magnet; when the vibration force is large, the upper exciting coil and the lower exciting coil can be connected, and damping generated by the second damping gap is increased to perform vibration reduction; at this time, the upper exciting coil and the upper annular permanent magnet, and the lower exciting coil and the lower annular permanent magnet respectively generate closed magnetic fields, and magnetic lines of force of the two closed magnetic fields coincide in the second damping gap. The magnetic fields in the first damping gap, the second damping gap and the third damping gap are all enhanced, the damping force generated by the damping gaps is also greatly enhanced, and when in actual use, the excitation size of the coil can be adjusted according to the external excitation vibration condition, and the vibration energy is converted into heat energy, so that the purpose of vibration reduction is achieved.
The rotating shaft is an arc groove shaft, the arc groove shaft is connected with the plunger, the purpose of converting linear reciprocating vibration of the arc groove shaft into rotary vibration of the inertia disc is achieved, a pair of magnetic frames, a pair of annular magnets, a first damping gap and a third damping gap are arranged between the inertia disc and the upper end cover and between the inertia disc and the lower end cover, the first damping gap and the third damping gap can generate smaller damping force under the condition that the vibration acting force is smaller, and if the vibration acting force of an external device is larger, enough magnetic field can be generated through an exciting coil on the inner wall of a sleeve, at the moment, the magnetic field generated by the exciting coil and the magnetic field of a permanent magnet form a closed-loop magnetic circuit penetrating through the first damping gap, the second damping gap and the third damping gap together, and the three damping gaps work simultaneously, so that the damper provides enough damping.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
Fig. 3 is a schematic structural diagram of the cooperation between the rotating shaft and the connecting sleeve in the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1 to 3, a rotary linear vibration damping magnetorheological fluid damper comprises an upper end cover 3, a sleeve 10, a lower end cover 14, a rotating shaft 7, an inertia disc 9, an upper ring permanent magnet 4 and a lower ring permanent magnet 12.
The upper end cover 3 is fixed above the sleeve 10 through bolts, the lower end cover 14 is fixed below the sleeve 10 through bolts to form a sealed cavity, and an inertia disc 9 is arranged in the cavity; bearing 8 is placed in bearing holes of the upper cover end 3 and the lower cover 14 and is respectively fixed by an upper bearing cover 6 and a lower bearing cover 17, and the bearing 8 is in transition fit with the rotating shaft 7; and a connecting sleeve 18 is fixed on the outer side of the rotating shaft 7.
The rotating shaft 7 is an arc groove shaft and is provided with three arc grooves 16. The connecting sleeve 18 is provided with a column hole, the connecting sleeve 18 is meshed with the rotating shaft 7, and is fixed with an arc-shaped groove 16 on the rotating shaft 7 through a plunger 15 in the column hole. The center of the connecting sleeve 18 is cylindrical, and three cylindrical convex keys 181 are uniformly fixed on the outer circle.
An upper magnetic frame 5 is fixed on the upper end cover 3 through bolts, and an upper ring permanent magnet 4 is fixed in a groove of the upper magnetic frame 5; the upper end cover 3 is also provided with a first liquid injection hole 2; the upper magnetic frame 5 is provided with a second liquid injection hole 51; the first liquid injection hole 2 communicates with the second liquid injection hole 51.
The lower end cover 14 is fixedly provided with a lower magnetic frame 13 through bolts, and a lower ring permanent magnet 12 is fixed in a groove of the lower magnetic frame 13.
The sleeve 10 is internally fixed with exciting coils, namely an upper exciting coil 1 fixed at the upper part and a lower exciting coil 11 fixed at the lower part; the upper exciting coil 1 and the upper ring permanent magnet 4 are on the same horizontal line; the lower exciting coil 11 is on the same horizontal line as the lower ring permanent magnet 5.
The upper end of the inertia disc 9 is concave, is matched with the upper magnetic frame 5 and has a gap between the upper end and the upper end, and is a first damping gap 21; the lower end of the inertia disc 9 is convex, is matched with the lower magnetic frame 13 and has a gap between the lower end and the lower magnetic frame, and is a third damping gap 19; a gap is formed between one side of the inertia disc 9 and the sleeve 10, and is a second damping gap 20; the other side of the inertia disc 9 is embedded into the connecting sleeve 18 and is fixed with the connecting sleeve 18.
The first damping gap 21, the second damping gap 20 and the third damping gap 19 are communicated; the magnetorheological fluid fills the first damping gap 21, the second damping gap 20 and the third damping gap 19 through the first liquid injection hole 2 and the second liquid injection hole 51.
Claims (6)
1. A rotary linear vibration damping magnetorheological fluid damper is characterized in that: the device comprises an upper end cover, a sleeve, a lower end cover, a rotating shaft, an inertia disc, an upper ring permanent magnet and a lower ring permanent magnet;
The upper end cover is fixed above the sleeve through a bolt, the lower end cover is fixed below the sleeve through a bolt to form a sealed cavity, and the inertia disc is arranged in the cavity; bearings are arranged in the bearing holes of the upper cover end and the lower cover and are respectively fixed by an upper bearing cover and a lower bearing cover, and the bearings are in transition fit with the rotating shaft; the outer side of the rotating shaft is fixedly provided with a connecting sleeve;
An upper magnetic frame is fixed on the upper end cover through bolts, and the upper ring permanent magnet is fixed in the upper magnetic frame; the upper end cover is provided with a first liquid injection hole; the upper magnetic frame is provided with a second liquid injection hole;
a lower magnetic frame is fixed on the lower end cover through bolts, and the lower ring permanent magnet is fixed in the lower magnetic frame;
The sleeve is internally fixed with an exciting coil, which is respectively an upper exciting coil fixed at the upper part and a lower exciting coil fixed at the lower part;
the upper end of the inertia disc is concave, a gap is formed between the inertia disc and the upper magnetic frame, and the inertia disc is a first damping gap;
the lower end of the inertia disc is convex, a gap is formed between the inertia disc and the lower magnetic frame, and the inertia disc is a third damping gap;
a gap is formed between one side of the inertia disc and the sleeve, and the inertia disc is a second damping gap;
the other side of the inertia disc is embedded into the connecting sleeve and is fixed with the connecting sleeve;
The first damping gap, the second damping gap and the third damping gap are communicated; the magnetorheological fluid fills the first damping gap, the second damping gap and the third damping gap with the magnetorheological fluid through the first liquid injection hole and the second liquid injection hole.
2. The rotary linear vibration damping magnetorheological fluid damper of claim 1, wherein the rotating shaft is an arc slot shaft.
3. The rotary linear vibration damping magnetorheological fluid damper of claim 2, wherein the rotary shaft is provided with three arc grooves.
4. The rotary linear vibration damping magnetorheological fluid damper of claim 1, wherein the connecting sleeve is provided with a column hole, the connecting sleeve is meshed with the rotating shaft, and the connecting sleeve is fixed with an arc-shaped groove on the rotating shaft through a plunger in the column hole.
5. The rotary linear vibration damping magnetorheological fluid damper of claim 1, wherein the connecting sleeve is cylindrical at the center and three cylindrical convex keys are uniformly fixed outside the circular shape.
6. The rotary linear vibration damping magnetorheological fluid damper of claim 1, wherein the upper exciting coil and the upper ring permanent magnet are on the same horizontal line; the lower exciting coil and the lower ring permanent magnet are on the same horizontal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210236027.5A CN114776753B (en) | 2022-03-11 | 2022-03-11 | Rotary type linear vibration damping magnetorheological fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210236027.5A CN114776753B (en) | 2022-03-11 | 2022-03-11 | Rotary type linear vibration damping magnetorheological fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114776753A CN114776753A (en) | 2022-07-22 |
| CN114776753B true CN114776753B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210236027.5A Active CN114776753B (en) | 2022-03-11 | 2022-03-11 | Rotary type linear vibration damping magnetorheological fluid damper |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052423A (en) * | 2009-11-10 | 2011-05-11 | 上海工程技术大学 | Magnetorheological torsion vibration damper |
| CN102168736A (en) * | 2011-05-05 | 2011-08-31 | 天津大学 | Magnetorheological torsional vibration damper for engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014052044A (en) * | 2012-09-07 | 2014-03-20 | Tohoku Univ | Mr damper |
| CN105782339B (en) * | 2016-02-29 | 2017-12-12 | 重庆大学 | Variable inertia variable damping torsional vibration damper |
| CN206830720U (en) * | 2017-06-27 | 2018-01-02 | 华东交通大学 | A kind of MR damper of damped coefficient continuously adjustabe |
| CN109630596B (en) * | 2018-12-26 | 2020-09-11 | 嘉兴学院 | Rotary type damping-adjustable silicone oil-magnetorheological torsional vibration damper |
| CN113803399B (en) * | 2021-09-10 | 2022-11-01 | 西安工业大学 | High-load magnetorheological fluid-elastic three-way vibration damper |
-
2022
- 2022-03-11 CN CN202210236027.5A patent/CN114776753B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052423A (en) * | 2009-11-10 | 2011-05-11 | 上海工程技术大学 | Magnetorheological torsion vibration damper |
| CN102168736A (en) * | 2011-05-05 | 2011-08-31 | 天津大学 | Magnetorheological torsional vibration damper for engine |
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| Publication number | Publication date |
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| CN114776753A (en) | 2022-07-22 |
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