CN109869418A - A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field - Google Patents
A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field Download PDFInfo
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- CN109869418A CN109869418A CN201910140706.0A CN201910140706A CN109869418A CN 109869418 A CN109869418 A CN 109869418A CN 201910140706 A CN201910140706 A CN 201910140706A CN 109869418 A CN109869418 A CN 109869418A
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Abstract
The invention discloses a kind of magnetorheological overloads of permanent-magnet-field to protect drum-type shaft coupling, including driving shaft, ball bearing, end cap, shell, permanent magnet, bolt, drum-type rotating cylinder, Meng Gai, driven shaft, magneto-rheological grease, isolation ring, sealing ring.Driving shaft and driven shaft are connected with drum-type rotating cylinder and Meng Gai respectively；Driving shaft is coupled by ball bearing with end cap, and revolute pair is formed；End cap, illiteracy lid are bolted with shell；End cap and Meng Gai are provided with annular groove, and permanent magnet is mounted on inside the annular groove, and is isolated permanent magnet and magneto-rheological grease by isolation ring；Chamber is formed between end cap, shell, illiteracy lid and drum-type rotating cylinder, magneto-rheological grease riddles in lid chamber, and passes through sealing ring and seal.The present invention does not need separately to add power supply unit, and external applied load is less than the when starting power transmitting of transmitting torque and acts on, on the contrary then play the role of Overload Protection, while having damping effect.
Description
Technical field
The invention belongs to security protection power transmissions, and in particular to a kind of magnetorheological overload of permanent-magnet-field is anti-
Protect drum-type shaft coupling.
Background technique
Traditional shaft coupling is divided into positive coupling and has certain axial, radial direction and angular error adjustable around flexible shaft coupling
Device.The former due to have the advantages that structure it is simple, it is at low cost, larger torque can be transmitted, be widely applied in mechanical driving device.
The latter has used some visco-elastic elements, the ability with certain absorption and vibration damping, higher in a few thing environmental requirement
Occasion is applied.Both shaft couplings not no function of overload protection during the work time.
With the development of machinery industry, the requirement to mechanical system constituent element is higher and higher, including element
Mechanical property, precision, multifunction and automatic anti-fault performance, rotation vibration damping and safety protection function etc..These property
Automatic anti-fault is the guarantee of staff's personal safety in operation in energy, while can guarantee the normal fortune of equipment
Row.Therefore, " a kind of breakdown torque coupler " (patent No.: 200910272344) disclosing a kind of breakdown torque coupler, should
Shaft coupling uses novel intelligent material magnetorheological fluid as transfer medium, and the magnet exciting coil of shaft coupling is connected with collecting ring, power supply
It is connected with collecting ring, by adjusting the output voltage or output electric current of power supply, to change the power-on voltage or logical of magnet exciting coil
The size of electric current controls the induction level of magnetorheological fluid workspace and the size of shear stress with this, realizes pair
Shaft coupling transmits the controllable of torque.Although using current excitation, energy consumption and efficiency however, this shaft coupling torque is adjustable
It is low.In order to overcome this problem, a kind of permanent magnet type magnetorheological fluid ultimate torque coupling (patent No.: 201010501932.6) public
A kind of magnetorheological shaft coupling of permanent-magnet type is opened.Its key structure is as follows: being evenly distributed with 8~24 on the inner wall of driving revolving drum and turns
Cylinder dovetail groove is uniform-distribution with the rotor dovetail groove of identical quantity, rotating cylinder dovetail groove and rotor ladder on the cylindrical body of driven rotor
Rotating cylinder permanent magnet and rotor permanent magnet are embedded in shape slot respectively, the polarity of rotating cylinder permanent magnet and rotor permanent magnet is towards on the contrary, turn
Rotating cylinder spacer and rotor spacer, magnetorheological materials are respectively provided on the outside of the installation site of cylinder permanent magnet and rotor permanent magnet
It is placed in the gap between rotating cylinder and rotor.The shaft coupling can be realized zero energy consumption, but due to permanent magnet arrangement problems, so that magnetic
Rheo-material region is unable to reach optimal magnetic circuit, finally reduces max. output torque.Furthermore (patent No.:
201610243330.2) a kind of shaft coupling is disclosed, key technology " it is powered to permanent magnet cover and generates strong electromagnetic field,
So that magnetorheological fluid is cured reaction by selecting permanent magnet to provide magnetic source as power transmission medium by magnetorheological fluid, mentioned with this
Torque is transmitted for enough dynamic shearing yield stresses." technical description is not carried out to the arrangement mode of permanent magnet on specification,
The magnetorheological fluid for being equally is unable to reach maximum output shear yield stress.Magnetorheological fluid used in the invention has volatilization
Property, be not suitable for being used for a long time.Additional permanent magnet cover described in specification kind will increase the volume of shaft coupling and important, propose production
Cost.
A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field of the present invention uses magneto-rheological grease for power transmission in advance
Medium, permanent magnet are driving source, and the arrangement regulation between permanent magnet is that axial magnetic field and radial magnetic field are arranged alternately with each other, can
The magnetic induction intensity of magneto-rheological grease region is improved to greatest extent, and then improves shaft coupling max. output torque, and there is nothing
Energy consumption, when external applied load is less than transmitting torque, starting power transmitting is acted on, on the contrary then play the role of Overload Protection, simultaneously
With damping effect.
The rheological property of magneto-rheological grease is close with magnetorheological fluid.System moment becomes class solid-like under the action of an external magnetic field
State, to have certain shear yield stress.After removing externally-applied magnetic field, and become the state of original similar lubricating grease, this
Process is continuous, reversible.Magneto-rheological grease has more stable physical structure compared to magnetorheological fluid, and internal particle will not sink
Drop and reunion.Its shear stress meets Binghan model with the variation of applied field strengths, embodies as follows:
In formula, τ is the shear stress of material；τyIt (B) is the shear yield stress of material, it is related with magnetic field；η is material
Viscosity；R is turntable radius；W is turntable angular speed；Gap of the h between two turntables.
Summary of the invention
1, the purpose of the present invention
The present invention provides a kind of magnetorheological overloads of permanent-magnet-field to protect drum-type shaft coupling, and the shaft coupling is with magnetic current
Change rouge into power transmission medium, using permanent magnet as driving source.By permanent magnet, the space where magneto-rheological grease generates magnetic field, so that magnetic current
Becoming rouge has certain shear yield stress, and then can transmit certain torque.In addition, importantly, between permanent magnet
Arrangement regulation be that axial magnetic field and radial magnetic field are arranged alternately with each other, magneto-rheological grease region can be improved to greatest extent
Magnetic induction intensity, and then improve shaft coupling max. output torque.The product does not need the external world and provides energy, simple with structure,
Compact, easy to operate, at low cost feature.
2, the technical solution of the object of the invention is realized
The invention proposes a kind of magnetorheological overloads of permanent-magnet-field to protect drum-type shaft coupling, including driving shaft, rolling
Pearl bearing, end cap, shell, permanent magnet, bolt, drum-type rotating cylinder, Meng Gai, driven shaft, magneto-rheological grease, isolation ring, sealing ring；
Driving shaft and driven shaft are connected with drum-type rotating cylinder and Meng Gai respectively；Driving shaft is coupled by ball bearing with end cap,
Form revolute pair；End cap and the inboard Meng Gai are all provided with annular groove, and permanent magnet is mounted on inside the annular groove, and passes through isolation
Permanent magnet and magneto-rheological grease are isolated by ring；There are two the isolation rings；The permanent magnet have it is multiple, each permanent magnet be ring
Shape, and concentric coplanar arrangement, the arrangement regulation between permanent magnet are that axial magnetic field and radial magnetic field are arranged alternately with each other,
Magnetic field concentration is in side；Chamber is formed between end cap, shell, illiteracy lid and drum-type rotating cylinder, magneto-rheological grease riddles in lid chamber,
And it is sealed by sealing ring.
Further, the driving shaft, driven shaft, end cap and shell, illiteracy lid are non-magnetic aluminum alloy materials；The drum-type
Rotating cylinder is strong magnetic conduction low-carbon steel material；The isolation ring, sealing ring are polyurethane material.
Further, end cap, illiteracy lid are bolted with shell；
Further, there are four the permanent magnets, and its is of same size.
Further, the magneto-rheological grease internal magnetization particle is carbonyl iron dust.
3, beneficial effect of the present invention
The present invention using shaft coupling using magneto-rheological grease is power transmission medium, using permanent magnet as driving source.By permanent magnet in magnetic current
Space generates magnetic field where becoming rouge, so that magneto-rheological grease has certain shear yield stress, and then can transmit certain torsion
Square.In addition, importantly, arrangement regulation between permanent magnet is that axial magnetic field and radial magnetic field are arranged alternately with each other, it can
The magnetic induction intensity of magneto-rheological grease region is improved to greatest extent, and then improves shaft coupling max. output torque.In addition, according to
Extraneous job requirement can replace the material of permanent magnet, to adjust the magnetism of permanent magnet to reach regulation transmitting torque range
Mesh.The product does not need the extraneous feature for providing energy, having structure simple, compact, easy to operate, at low cost.When outer load
The when starting power transmitting that lotus is less than transmitting torque acts on, on the contrary then play the role of Overload Protection, while having vibration damping work
With.
Detailed description of the invention
Fig. 1 is the overall structure signal that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects drum-type shaft coupling
Figure.
Fig. 2 is that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects drum-type shaft coupling interior permanent magnets another
The overall structure diagram of arrangement.
Fig. 3 is that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects axial magnetic between drum-type shaft coupling permanent magnet
Field and radial magnetic field are arranged alternately with each other schematic diagram.
Fig. 4 is the shearing that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects magneto-rheological grease in drum-type shaft coupling
Power is with changes of magnetic field curve.
Fig. 5 is permanent magnet ordinal arrangement schematic diagram.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
In Fig. 1, a kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field of the present invention, including actively
Axis 1, ball bearing 2, end cap 3, shell 4, permanent magnet 5, bolt 6, drum-type rotating cylinder 7, cover lid 8, driven shaft 9, magneto-rheological grease 10, every
From ring 11, sealing ring 12.
In conjunction with Fig. 1-Fig. 3, driving shaft 1 and driven shaft 9 are connected with drum-type rotating cylinder 7 and Meng Gai 8 respectively；Driving shaft 1 passes through rolling
Pearl bearing 2 couples with end cap 3, forms revolute pair；End cap 3, illiteracy lid 8 are connect with shell 4 by bolt 6；In end cap 3 and Meng Gai 8
Side is all provided with annular groove, and permanent magnet 5 is mounted on inside the annular groove, and by isolation ring 11 by permanent magnet 5 with it is magnetorheological
Rouge 10 is isolated；Chamber is formed between end cap 3, shell 4, illiteracy lid 8 and drum-type rotating cylinder 7, magneto-rheological grease 10 riddles lid chamber
In, and sealed by sealing ring 12.Driving shaft 1, driven shaft 9, end cap 3 and shell 4, illiteracy lid 8 are non-magnetic aluminum alloy materials；Drum
Formula rotating cylinder 7 is strong magnetic conduction low-carbon steel material；Isolation ring 11, sealing ring 12 are polyurethane material.There are two isolation rings 11.Permanent magnet
There are four 5, each permanent magnet 5 is cyclic annular, and concentric coplanar arrangement, and the arrangement regulation between permanent magnet 5 is axial magnetic
Field and radial magnetic field are arranged alternately with each other.10 internal magnetization particle of magneto-rheological grease is carbonyl iron dust.
In conjunction with Fig. 1-Fig. 4, specific implementation process of the present invention is as follows: permanent magnet 5 generates magnetic field, acts on 10 institute of magneto-rheological grease
In region, rheological effect occurs for magneto-rheological grease 10, to have certain shear yield stress, shear stress becomes with magnetic field strength
Change curve, as can be seen from Figure 3 the saturation shear stress of magneto-rheological grease can reach 65kPa or more.In turn by drum-type rotating cylinder 7
It is fixed together with end cap 3, shell 4 and illiteracy 8 flexibility of lid, so that shaft coupling has certain breakdown torque, one can be transmitted
Determine the torque of range.When the external world, load is greater than the breakdown torque, drum-type rotating cylinder 7 and end cap 3, shell 4 and illiteracy lid 8 divide
From, play the role of overload protection, conversely, then operating normally.Arrangement regulation between permanent magnet 5 is axial magnetic field and diameter
It is arranged alternately with each other to magnetic field, the magnetic field which can generate under square one focuses primarily upon side, Jin Er great
The shear yield stress of turntable side magneto-rheological grease 10 is increased greatly.In addition, permanent magnet 5 can be replaced according to extraneous job requirement
Material, to adjust the magnetism of permanent magnet 5 to reach the mesh of regulation transmitting torque range.
It is tested by experiment, test environment is that permanent magnet is ordinal arrangement mode (shown in Fig. 5) and permanent magnet is this respectively
Under invention arrangement mode, inside a kind of magnetorheological overload protection single disc-type shaft coupling of permanent-magnet-field of the present invention
The shear yield stress of magneto-rheological grease and the output torque of shaft coupling are tested, and are compared, concrete outcome such as 1 institute of table
Show.
Table 1
| Permanent magnet arrangement mode | Ordinal arrangement | Present invention arrangement |
| Magneto-rheological grease shear yield stress | 45kPa | 61kPa |
| Shaft coupling output torque | 11.2Nm | 15.6Nm |
It can be found that permanent magnet arrangement mode of the present invention is than common permanent magnet in the case where other test environment are the same
Arrangement mode can generate the output torque of bigger magneto-rheological grease shear yield stress and shaft coupling.
Claims (5)
1. a kind of magnetorheological overload of permanent-magnet-field protects drum-type shaft coupling, it is characterised in that: including driving shaft (1), rolling
Pearl bearing (2), shell (4), permanent magnet (5), bolt (6), drum-type rotating cylinder (7), covers lid (8), driven shaft (9), magnetic at end cap (3)
Rheology rouge (10), isolation ring (11), sealing ring (12)；
Driving shaft (1) and driven shaft (9) are connected with drum-type rotating cylinder (7) He Menggai (8) respectively；Driving shaft (1) passes through ball bearing
(2) couple with end cap (3), form revolute pair；The inboard end cap (3) He Menggai (8) is all provided with annular groove, permanent magnet (5) installation
Permanent magnet (5) and magneto-rheological grease (10) are isolated inside the annular groove, and through isolation ring (11)；The isolation ring
(11) there are two；The permanent magnet (5) has multiple, and each permanent magnet (5) is ring-type, and concentric coplanar arrangement, permanent magnetism
Arrangement regulation between body (5) is that axial magnetic field and radial magnetic field are arranged alternately with each other, and magnetic field concentration is in side；End cap (3), shell
Chamber is formed between body (4), illiteracy lid (8) and drum-type rotating cylinder (7), magneto-rheological grease (10) riddles in lid chamber, and by close
Seal (12) sealing.
2. a kind of magnetorheological overload of permanent-magnet-field protects drum-type shaft coupling according to claim 1, it is characterised in that:
The driving shaft (1), driven shaft (9), end cap (3) and shell (4) cover lid (8) as non-magnetic aluminum alloy materials；The drum-type turns
Cylinder (7) is strong magnetic conduction low-carbon steel material；The isolation ring (11), sealing ring (12) are polyurethane material.
3. a kind of magnetorheological overload of permanent-magnet-field protects drum-type shaft coupling according to claim 1, it is characterised in that:
End cap (3), illiteracy lid (8) are connect with shell (4) by bolt (6).
4. a kind of magnetorheological overload of permanent-magnet-field protects drum-type shaft coupling according to claim 1, it is characterised in that:
There are four the permanent magnets (5), and its is of same size.
5. a kind of magnetorheological overload of permanent-magnet-field protects drum-type shaft coupling according to claim 1, it is characterised in that:
Magneto-rheological grease (10) the internal magnetization particle is carbonyl iron dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140706.0A CN109869418A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140706.0A CN109869418A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field |
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| Publication Number | Publication Date |
|---|---|
| CN109869418A true CN109869418A (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910140706.0A Pending CN109869418A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266177A (en) * | 2019-06-22 | 2019-09-20 | 石愈超 | A kind of magnetic shaft coupling |
| CN110594314A (en) * | 2019-08-19 | 2019-12-20 | 南京理工大学 | Permanent magnet excited conical coupling |
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|---|---|---|---|---|
| US2575360A (en) * | 1947-10-31 | 1951-11-20 | Rabinow Jacob | Magnetic fluid torque and force transmitting device |
| JP2000065094A (en) * | 1998-08-19 | 2000-03-03 | Dana Corp | Continuous variable transmission using magnetorheological fluid |
| CN102130518A (en) * | 2011-03-28 | 2011-07-20 | 天津理工大学 | Four-working-side coreless generator |
| CN202597545U (en) * | 2012-06-15 | 2012-12-12 | 山东科技大学 | Magnetorheological fluid elastic coupling |
| CN203098636U (en) * | 2012-12-12 | 2013-07-31 | 长安大学 | Magneto-rheological clutch |
| JP2014229625A (en) * | 2013-05-17 | 2014-12-08 | 国立大学法人 名古屋工業大学 | Magnetic functional fluid, and damper and clutch using the same |
-
2019
- 2019-02-26 CN CN201910140706.0A patent/CN109869418A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2575360A (en) * | 1947-10-31 | 1951-11-20 | Rabinow Jacob | Magnetic fluid torque and force transmitting device |
| JP2000065094A (en) * | 1998-08-19 | 2000-03-03 | Dana Corp | Continuous variable transmission using magnetorheological fluid |
| CN102130518A (en) * | 2011-03-28 | 2011-07-20 | 天津理工大学 | Four-working-side coreless generator |
| CN202597545U (en) * | 2012-06-15 | 2012-12-12 | 山东科技大学 | Magnetorheological fluid elastic coupling |
| CN203098636U (en) * | 2012-12-12 | 2013-07-31 | 长安大学 | Magneto-rheological clutch |
| JP2014229625A (en) * | 2013-05-17 | 2014-12-08 | 国立大学法人 名古屋工業大学 | Magnetic functional fluid, and damper and clutch using the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266177A (en) * | 2019-06-22 | 2019-09-20 | 石愈超 | A kind of magnetic shaft coupling |
| CN110594314A (en) * | 2019-08-19 | 2019-12-20 | 南京理工大学 | Permanent magnet excited conical coupling |
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Application publication date: 20190611 |
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