CN107575522A - A kind of magnetorheological mud damper of foraminous spiral tract - Google Patents
A kind of magnetorheological mud damper of foraminous spiral tract Download PDFInfo
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- CN107575522A CN107575522A CN201710609602.0A CN201710609602A CN107575522A CN 107575522 A CN107575522 A CN 107575522A CN 201710609602 A CN201710609602 A CN 201710609602A CN 107575522 A CN107575522 A CN 107575522A
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- magnetorheological
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Abstract
The invention discloses a kind of magnetorheological mud damper of foraminous spiral tract, cylinder body shell (4) both ends of the damper are provided with cylinder body capping (2), piston (10) is provided with cylinder body shell (4), the both ends of piston (10) are connected to pull bar (1), the outer end of pull bar (1) is provided with magnet exciting coil (6) through cylinder body capping (2) in the periphery of cylinder body shell (4).Screw type duct (11) are provided with described piston (10), having respectively between piston (10) and the cylinder body at cylinder body shell (4) both ends capping (2) has a cavity (13), and magnetorheological mud is filled with the cavity (13) and in the screw type duct (11) of piston (10).The magnetorheological mud passage of the magnetorheological mud damper of foraminous spiral tract of the present invention is located at internal piston, and big with magnetic field angle, regulating effect is good；Magnet exciting coil is wound in outside cylinder body, is not contacted directly with piston and magnetorheological mud, convenient to replace, good endurance；Can be wide according to the magnet exciting coil for needing to change the different numbers of turn of actual conditions, applicability.Magnetorheological mud shear yield strength is big, and resistance to settling can be good.
Description
Technical field
The present invention relates to a kind of magnetorheological mud damper, belong to the technical field every vibration absorber.
Background technology
Fast development and the structure shape such as continuous progress, skyscraper, tall and slender structure, large-span structure of science and technology with economy
Formula is increasingly favored by people.Compared with traditional tier building, said structure is to dynamic load (such as high wind and earthquake)
Effect can produce larger structural response, influence these large scale structure securities and usability.Therefore large-scale knot how is reduced
The wind shake or earthquake response of structure are a present heat subjects.Building structure generally strengthen itself bearing capacity and stiffness or
Energy-dissipating and shock-absorbing measure is taken in the structure to resist the effect of dynamic load.In recent ten years, MR damper is extensive
In energy-eliminating shock-absorbing applied to various different building structure.MR damper be using magnetorheological materials under the variation magnetic field
Rheological behavior and the semi-automatic control device that makes, combine the advantages of passive control stability is with active control adjustability,
Energy consumption is low, efficiency high, cost are few, and good effect is achieved in the vibration damping control of building structure.
The adjustability of magnetorheological mud damper is realized using magnetic rheology effect, i.e., under additional magnetic fields, magnetic
Rheology mud is changed into elastic-plastic solid within the Millisecond time from the plastic body of free-flowing, this change be it is reversible, therefore
It can be applied in the design of damper.Magnetorheological mud is the rising star of magnetorheological materials family, typically by ferromagnetic particle, carrier with
And various additives composition.Traditional magnetic flow liquid is there is the shortcoming such as resistance to settling is poor, Ultimate Shear yield strength is low, and magnetic
The adjustable extent of magnetorheological elastomer is small, and ferromagnetic particle can not move freely.Magnetorheological mud is between magnetic flow liquid and magnetorheological elasticity
Between body, the advantages of combining two kinds of materials and most of shortcoming can be overcome, there is good resistance to settling, larger null field
Viscosity and higher shear yield strength.However, highly viscous magnetorheological mud make it that the coil in damper is more easy to wear, and it is right
The sensitivity of uniform magnetic field proposes higher requirement.The current research to magnetorheological mud and magnetorheological mud damper both at home and abroad
Relatively fewer, the construction of traditional magnetic rheological liquid damper is not particularly suited for the application of magnetorheological mud.Due to the above problems,
Magnetorheological mud damper is greatly limited in practical engineering application, therefore need be designed a kind of with new structure
Damper so that magnetorheological mud can preferably play a role.
The content of the invention
Technical problem：The technical problems to be solved by the invention are to provide a kind of magnetorheological mud damper of foraminous spiral tract, should
Magnetorheological mud damping device has that coil is replaceable, can produce the advantages of larger even strong controlling magnetic field, good endurance.
Technical scheme：In order to solve the above technical problems, a kind of magnetorheological mud damper of foraminous spiral tract of the present invention is used
Technological means be：
The cylinder body shell both ends of the damper are covered provided with cylinder body, and piston, the both ends difference of piston are provided with cylinder body shell
Pull bar is connected with, the outer end of pull bar is covered through cylinder body, and magnet exciting coil is provided with the periphery of cylinder body shell.
Screw type duct is provided with described piston, have between piston and the cylinder body capping at cylinder body shell both ends has one respectively
Individual cavity, magnetorheological mud is filled with the cavity and in the screw type duct of piston.
Described cylinder body shell is provided with magnetorheological mud fill orifice.
The outside of described cylinder body shell is provided with protection shell.
The cylinder body internal diameter of outer cover is consistent with the external diameter of piston, between the two tight.
Magnet exciting coil outside the cylinder body is by protecting the duct on shell to be connected with extraneous power supply.
Wherein, magnet exciting coil is wrapped in outside cylinder body, is produced larger and close to even strong magnetic field.
Wherein, the helical duct of the piston is longer, larger with magnetic direction angle.
Wherein, helical duct is magnetorheological mud passage, and its quantity can depend on the circumstances according to output requirement.
Wherein, the magnet exciting coil is sealed in cylinder body outer layer protection shell, and containment vessel is detachable.
Wherein, the cylinder diameter is consistent with piston diameter, between the two tight.
Wherein, the cylinder body both ends are covered provided with cylinder body, and cylinder body is covered to cooperate by internal and external threads with cylinder body and connected.
Beneficial effect：Compared to prior art, technical solution of the present invention have the advantage that for：
First, the flow channel of magnetorheological mud is located at coil inside in the magnetorheological mud damper of the present invention, is produced with coil
Even magnetic magnetic direction angle it is larger, and passage has larger length, therefore effectively working region is big, and regulating effect is good, resistance
The adjustability of Buddhist nun's device greatly improves；
Secondly, the magnet exciting coil of the magnetorheological mud damper of the present invention is located at outside cylinder body, effectively avoids high viscosity magnetorheological
Mud directly contacts with magnet exciting coil, slows down the aging of coil, adds the durability of damper, reduces maintenance cost；
Furthermore tight between the piston and cylinder body of the magnetorheological mud damper of the present invention, the flow channel of magnetorheological mud are located at
In the helical duct of internal piston, the output of damper can be so improved；
Finally, the magnet exciting coil of the magnetorheological mud damper of the present invention is sealed in dismountable outer layer protection shell, is easy to replace
Change, can be according to the mechanical characteristic for needing flexibly to change magnetorheological mud damper of different application occasion, so as to can be widely applied to
In the wind resistance and antiseismic engineering of the civil engineering structures such as skyscraper, large-span structure, bridge structure, the machine of being applied to can be also expanded
Tool, aviation field vibration damping in.
Brief description of the drawings
Fig. 1：Damper axial cross-sectional views,
Fig. 2：Damper cross-sectional view,
Fig. 3：Damper front schematic view,
Fig. 4：Damper cylinder body and coil schematic diagram.
Have in figure：Pull bar 1, cylinder body capping 2, cable channel 3, cylinder body shell 4, coil banding region 5, excitation wire 6, protection
Shell 7, magnetorheological mud fill orifice 8, duct gateway 9, piston 10, screw type duct 11, bolt 12, cavity 13.
Embodiment
According to following embodiments, the present invention may be better understood.It is however, as it will be easily appreciated by one skilled in the art that real
Apply the content described by example and be merely to illustrate the present invention, without should be also without limitation on sheet described in detail in claims
Invention.
As shown in figures 1-4, the magnetorheological mud damper of the present invention, by the cylinder body shell 4 with cylinder body capping 2, band Double-spiral
The piston 10 and pull bar 1 in duct 11 form；Filled with magnetorheological in the helical duct 11 of piston 10 and the cavity 13 of cylinder body
Mud；The surrounding of piston 10 is tightly agreed with the inwall of cylinder body shell 4, magnetorheological mud can not from the gap of piston 10 and cylinder body shell 4 it
Between flow；Magnet exciting coil 6 is wound with outside cylinder body shell 4, is produced and the even magnetic magnetic field of the direction of motion identical of piston 10；10 liang of piston
Side is arranged with to be stretched out outside cylinder body with its integrally formed pull bar 1, pull bar 1 through hollow cylinder body shell 4, cylinder body shell 4 with
The junction of cylinder body capping 2 is connected using sealant sealing；The magnet exciting coil 6 of cylinder body is by protecting the cable channel 3 on shell 7
It is connected with extraneous power supply；The both ends of cylinder body shell 4 are provided with cylinder body capping 2, and cylinder body shell 4 is with cylinder body capping 2 by being twisted by screw thread
It is close to and is connected in entirety, and be coated with fluid sealant, the fluid sealant that is coated with same with 2 junctions of cylinder body capping of pitch brace 1 is sealed；Cylinder
Body case 4 is provided with magnetorheological mud fill orifice 8, and magnetorheological mud fill orifice 8 is used for pouring into and pouring out for magnetorheological mud, magnetorheological mud
Fill orifice 8 is provided with sealing device.
Magnet exciting coil 6 in the magnetorheological mud damper of the present invention is wound in the outside of cylinder body shell 4, and the number of turn is according to output demand
It is determined that coil produces larger even strong controlling magnetic field, direction is parallel with piston movement direction；It is outer that magnet exciting coil 6 is externally provided with protection
Shell 7, protection shell 7 are connected to the outside of cylinder body shell 4 with bolt 12, and junction is coated with fluid sealant and sealed；Magnet exciting coil 6 is logical
Cable channel 3 and extraneous power on are crossed, the magnetic field inside damper is controlled with realizing；Screw type duct 11 is located at piston 10
Interior, big with magnetic direction angle, the length of screw type duct 11 is grown, and greatly improves the adjustability of damper；Screw type duct 11
Both ends are connected with the cavity 13 at cylinder body both ends, and magnetorheological mud is from the into and out screw type duct in passway 9；Screw type duct 11
Can have multiple, its quantity is determined on a case-by-case basis.
The magnetorheological mud damper of the present invention is using magnetic rheology effect of the magnetorheological mud under variation magnetic field come the vibrational energy that dissipates
Amount.When bearing external load (vibration), piston 10 and pull bar 1 will be past in cylinder body shell 4 (cylinder body is made for metal)
Multiple to move, the magnetorheological mud in the cavity 13 of cylinder body will be forced to move back and forth by screw type duct 11 in the both sides of piston 10；
In motion process, when passing to electric current in magnet exciting coil 6, coil inside will be produced along the even magnetic magnetic field of cylinder body axis direction,
Magnetorheological mud is set to produce magnetic rheology effect and solidify rapidly, piston 10 need to overcome the larger damping force acting of magnetorheological mud and consume
Energy, so as to play the effect of damping.According to actual conditions, magnetic can be changed by adjusting the size of current in magnet exciting coil 6
Rheology mud shear yield strength, so as to change damping force.The general circle of coil winding 50~5000,0.1~2mm of coil diameter.
When the magnetorheological mud damper of the present invention vibrates under outer load action, piston 10 is with pull bar 1 as the external world swashs
Action is encouraged, overcoming makes damping force dissipation vibrational energy caused by magnetorheological mud, so as to reduce the deformation of structure, delay even
Avoid structural damage.
In the magnetorheological mud damper of the present invention magnet exciting coil 6 produce magnetic direction and magnetorheological mud direction of motion angle compared with
Greatly, close to vertically, passage is longer, so as to obtain larger effective working region, reaches good magnetic field regulating effect.This construction
Coordinate the high viscosity characteristic of magnetorheological mud, damper is obtained bigger output.
In the magnetorheological mud damper of the present invention, magnetorheological mud is stored in the cavity 13 and internal piston helical duct of cylinder body
In 11, magnet exciting coil 6 is located at the outside of cylinder body shell 4, is not contacted directly with magnetorheological mud, so as to prevent magnet exciting coil 6 because of magnetic current
Become mud move back and forth and caused by abrasion；Magnet exciting coil 6 is located in detachable protective shell 7, avoid its directly with the external world
Environment contacts, and improves anticorrosive and ageing resistace；And magnet exciting coil 6 is easily changed, can need to change according to actual conditions
The different numbers of turn, thickness coil obtain different magnetic field intensities, and applicability is wide, efficiently solve the durable of magnetorheological mud damper
Property with adjustable sex chromosome mosaicism.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention
The restriction of embodiment.For those of ordinary skill in the field, it can also be made on the basis of the above description
Its various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
Among the obvious changes or variations that bright spirit is extended out is still in protection scope of the present invention.
Claims (6)
1. a kind of magnetorheological mud damper of foraminous spiral tract, it is characterised in that cylinder body shell (4) both ends of the damper are provided with cylinder body
Cover (2), be provided with piston (10) in cylinder body shell (4), the both ends of piston (10) are connected to pull bar (1), pull bar (1) outside
End covers (2) through cylinder body, and magnet exciting coil (6) is provided with the periphery of cylinder body shell (4).
2. the magnetorheological mud damper of foraminous spiral tract according to claim 1, it is characterised in that set in described piston (10)
There is screw type duct (11), having respectively between piston (10) and the cylinder body capping (2) at cylinder body shell (4) both ends has a cavity
(13) magnetorheological mud, is filled with the cavity (13) and in the screw type duct (11) of piston (10).
3. the magnetorheological mud damper of foraminous spiral tract according to claim 1, it is characterised in that described cylinder body shell (4)
It is provided with magnetorheological mud fill orifice (8).
4. the magnetorheological mud damper of foraminous spiral tract according to claim 1, it is characterised in that described cylinder body shell (4)
Outside be provided with protection shell (7).
5. the magnetorheological mud damper of foraminous spiral tract according to claim 1, it is characterised in that：In the cylinder body shell (4)
Footpath is consistent with the external diameter of piston (10), between the two tight.
6. the magnetorheological mud damper of foraminous spiral tract according to claim 1, it is characterised in that：Excitation wire outside the cylinder body
(6) are enclosed by protecting the duct on shell (7) to be connected with extraneous power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609602.0A CN107575522A (en) | 2017-07-25 | 2017-07-25 | A kind of magnetorheological mud damper of foraminous spiral tract |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609602.0A CN107575522A (en) | 2017-07-25 | 2017-07-25 | A kind of magnetorheological mud damper of foraminous spiral tract |
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| Publication Number | Publication Date |
|---|---|
| CN107575522A true CN107575522A (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710609602.0A Pending CN107575522A (en) | 2017-07-25 | 2017-07-25 | A kind of magnetorheological mud damper of foraminous spiral tract |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235688A (en) * | 2018-11-07 | 2019-01-18 | 山东大学 | A kind of magnetorheological half active stiffness adjustable shock absorber |
| CN109723750A (en) * | 2019-02-13 | 2019-05-07 | 重庆大学 | A kind of MR damper piston component of band sedimentation Active dispersion devices |
| CN114576230A (en) * | 2022-03-01 | 2022-06-03 | 安徽建筑大学 | Hydraulic loading device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865729A (en) * | 2006-06-21 | 2006-11-22 | 天津大学 | Spiral groove structured magneto-rheological damper |
| CN101319699A (en) * | 2008-07-11 | 2008-12-10 | 重庆大学 | Magneto-rheological fluid vibration damper with ring-shaped external magnetic field generator |
| CN103322114A (en) * | 2013-05-28 | 2013-09-25 | 吉林大学 | Spiral valve hole type magnetorheological damper |
| CN103511547A (en) * | 2013-10-28 | 2014-01-15 | 重庆大学 | Self-sensing magnetorheological damper adopting spiral damping channel |
-
2017
- 2017-07-25 CN CN201710609602.0A patent/CN107575522A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865729A (en) * | 2006-06-21 | 2006-11-22 | 天津大学 | Spiral groove structured magneto-rheological damper |
| CN101319699A (en) * | 2008-07-11 | 2008-12-10 | 重庆大学 | Magneto-rheological fluid vibration damper with ring-shaped external magnetic field generator |
| CN103322114A (en) * | 2013-05-28 | 2013-09-25 | 吉林大学 | Spiral valve hole type magnetorheological damper |
| CN103511547A (en) * | 2013-10-28 | 2014-01-15 | 重庆大学 | Self-sensing magnetorheological damper adopting spiral damping channel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235688A (en) * | 2018-11-07 | 2019-01-18 | 山东大学 | A kind of magnetorheological half active stiffness adjustable shock absorber |
| CN109723750A (en) * | 2019-02-13 | 2019-05-07 | 重庆大学 | A kind of MR damper piston component of band sedimentation Active dispersion devices |
| CN114576230A (en) * | 2022-03-01 | 2022-06-03 | 安徽建筑大学 | Hydraulic loading device |
| CN114576230B (en) * | 2022-03-01 | 2022-08-26 | 安徽建筑大学 | Hydraulic loading device |
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Application publication date: 20180112 |
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