CN109869420A - A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field - Google Patents
A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field Download PDFInfo
- Publication number
- CN109869420A CN109869420A CN201910140219.4A CN201910140219A CN109869420A CN 109869420 A CN109869420 A CN 109869420A CN 201910140219 A CN201910140219 A CN 201910140219A CN 109869420 A CN109869420 A CN 109869420A
- Authority
- CN
- China
- Prior art keywords
- permanent
- magnet
- end cap
- disc
- permanent magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a kind of magnetorheological overloads of permanent-magnet-field to protect multi-disc type shaft coupling, including driving shaft, ball bearing, end cap, magneto-rheological grease, shell, driving disc spacing pressing, bolt, permanent magnet, isolation ring, Meng Gai, driven shaft, rotating cylinder, driven disc, sealing ring.Driving shaft and driven shaft are connected with 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；Driving disc spacing pressing and driven disc are separately fixed at rotating cylinder and housing upper face；End cap, shell cover and cover and form chamber between rotating cylinder, and magneto-rheological grease riddles in lid chamber, and passes through sealing ring sealing.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 multi-disc 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 multi-disc type shaft coupling of permanent-magnet-field of the present invention uses magneto-rheological grease in advance to pass
Power media, 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, energy
The enough magnetic induction intensity for improving magneto-rheological grease region to greatest extent, and then shaft coupling max. output torque is improved, and have
Without the simple feature of energy consumption, structure.
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 overload protection multi-disc type shaft coupling of permanent-magnet-field, 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
The invention proposes a kind of magnetorheological overload of permanent-magnet-field protect multi-disc type shaft coupling, including driving shaft,
It is ball bearing, end cap, magneto-rheological grease, shell, driving disc spacing pressing, bolt, permanent magnet, isolation ring, Meng Gai, driven shaft, rotating cylinder, driven
Disk, sealing ring；
Driving shaft and driven shaft are connected with rotating cylinder and Meng Gai respectively；Driving shaft is coupled by ball bearing with end cap, is formed
Revolute pair；There are three the driving disc spacing pressings, driven disc is there are two being staggered, and there are two the isolation rings；End cap and Meng Gai are opened
There is annular groove, multiple permanent magnets are mounted on inside the annular groove, and are separated by permanent magnet and magneto-rheological grease by isolation ring
From, chamber is formed between end cap, shell, Meng Gai, driving disc spacing pressing, driven disc and rotating cylinder, magneto-rheological grease riddles in the chamber, and
It is sealed by sealing ring；Each permanent magnet is cyclic annular, and concentric coplanar arrangement, and the arrangement regulation between permanent magnet is axis
It is arranged alternately with each other to magnetic field and radial magnetic field；Driving disc spacing pressing and driven disc are separately fixed at rotating cylinder and housing upper face.
Further, end cap, illiteracy lid are bolted with shell；
Further, the driving shaft, driven shaft, end cap and shell, illiteracy lid are non-magnetic aluminum alloy materials；The active
Disk, driven disc are strong magnetic conduction low-carbon steel material；The isolation ring, sealing ring are polyurethane material.
Further, there are four its is of same size for the permanent magnet.
Further, the magneto-rheological grease internal magnetization particle is carbonyl iron dust.
3, beneficial effect of the present invention
Shaft coupling of the invention 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.
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 multi-disc type shaft coupling
Figure.
Fig. 2 is that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects between multi-disc type shaft coupling permanent magnet axially
Magnetic field and radial magnetic field are arranged alternately with each other schematic diagram.
Fig. 3 is that a kind of magnetorheological overload of permanent-magnet-field of the present invention protects cutting for magneto-rheological grease in multi-disc type shaft coupling
Shear force is with changes of magnetic field curve.
Fig. 4 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 multi-disc type shaft coupling of permanent-magnet-field of the present invention, including master
Moving axis 1, ball bearing 2, end cap 3, magneto-rheological grease 4, shell 5, driving disc spacing pressing 6, bolt 7, permanent magnet 8, isolation ring 9, cover lid 10, from
Moving axis 11, rotating cylinder 12, driven disc 13, sealing ring 14.
Driving shaft 1 and driven shaft 11 are connected with rotating cylinder 12 and Meng Gai 10 respectively combined with Figure 1 and Figure 2,；Driving shaft 1 passes through rolling
Pearl bearing 2 couples with end cap 3, forms revolute pair；End cap 3, illiteracy lid 10 are connect with shell 5 by bolt 7；End cap 3 and Meng Gai 10
It is all provided with annular groove, permanent magnet 8 is mounted on inside the annular groove, and passes through isolation ring 9 for permanent magnet 8 and magneto-rheological grease 4
It is isolated；Driving disc spacing pressing 6 and driven disc 13 are separately fixed above rotating cylinder 12 and shell 5；End cap 3, shell 5 cover lid 10 and turn
Chamber is formed between cylinder 12, magneto-rheological grease 4 riddles in the chamber, and seals by sealing ring 14.Driving shaft 1, driven shaft 11,
End cap 3 and shell 5, illiteracy lid 10 are non-magnetic aluminum alloy materials；Driving disc spacing pressing 6, driven disc 13 are strong magnetic conduction low-carbon steel material；Isolation
Ring 9, sealing ring 14 are polyurethane material.There are three driving disc spacing pressings 6, there are two driven discs 13；There are two isolation rings 9.Permanent magnet 8 has
Four, each permanent magnet 8 is ring-type, and concentric coplanar arrangement, the arrangement regulation between permanent magnet 8 be axial magnetic field and
Radial magnetic field is arranged alternately with each other.4 internal magnetization particle of magneto-rheological grease is carbonyl iron dust.
In conjunction with Fig. 1-Fig. 3, specific implementation process of the present invention is as follows: permanent magnet 8 generates magnetic field, acts on 4 institute of magneto-rheological grease
In region, rheological effect occurs for magneto-rheological grease 4, 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 6 He of driving disc spacing pressing
13 flexibility of driven disc is fixed together, so that shaft coupling has certain breakdown torque, can transmit a certain range of torque.When
When external world's load is greater than the breakdown torque, driving disc spacing pressing 6 and driven disc 13 are separated, and play the role of overload protection, instead
It, then operate normally.Arrangement regulation between permanent magnet 8 is that axial magnetic field and radial magnetic field are arranged alternately with each other, the arrangement side
The magnetic field that formula can generate under square one focuses primarily upon side, and then significantly increases turntable side magneto-rheological grease 4
Shear yield stress.In addition, the material of permanent magnet 8 can be replaced according to extraneous job requirement, to adjust the magnetism of permanent magnet 8
Come with reaching the mesh for regulating and controlling to transmit torque range.
It is tested by experiment, test environment is that permanent magnet is ordinal arrangement mode (shown in Fig. 4) 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. the magnetorheological overload of permanent-magnet-field a kind of protects multi-disc type shaft coupling, it is characterised in that: including driving shaft (1),
Ball bearing (2), end cap (3), magneto-rheological grease (4), shell (5), driving disc spacing pressing (6), bolt (7), permanent magnet (8), isolation ring
(9), lid (10), driven shaft (11), rotating cylinder (12), driven disc (13), sealing ring (14) are covered；
Driving shaft (1) and driven shaft (11) are connected with rotating cylinder (12) He Menggai (10) respectively；Driving shaft (1) passes through ball bearing
(2) couple with end cap (3), form revolute pair；There are three the driving disc spacing pressings (6), is staggered there are two driven discs (13), described
There are two isolation rings (9)；End cap (3) He Menggai (10) is provided with annular groove, and multiple permanent magnets (8) are mounted on the annular groove
The inside, and isolated permanent magnet (8) and magneto-rheological grease (4) by isolation ring (9), end cap (3), shell (5) cover lid (10) master
Chamber is formed between Moving plate (6), driven disc (13) and rotating cylinder (12), magneto-rheological grease (4) riddles in the chamber, and by close
Seal (14) sealing；Each permanent magnet (8) is cyclic annular, and concentric coplanar arrangement, the arrangement regulation between permanent magnet (8)
It is arranged alternately with each other for axial magnetic field and radial magnetic field, magnetic field concentration is in side；Driving disc spacing pressing (6) and driven disc (13) are fixed respectively
Rotating cylinder (12) and shell (5) above.
2. a kind of magnetorheological overload of permanent-magnet-field protects multi-disc type shaft coupling according to claim 1, feature exists
In: end cap (3), illiteracy lid (10) are connect with shell (5) by bolt (7).
3. a kind of magnetorheological overload of permanent-magnet-field protects multi-disc type shaft coupling according to claim 1, feature exists
In: the driving shaft (1), driven shaft (11), end cap (3) and shell (5) cover lid (10) as non-magnetic aluminum alloy materials；It is described
Driving disc spacing pressing (6), driven disc (13) are strong magnetic conduction low-carbon steel material；The isolation ring (9), sealing ring (14) are polyurethane material.
4. a kind of magnetorheological overload of permanent-magnet-field protects multi-disc type shaft coupling according to claim 1, feature exists
In: there are four the permanent magnets (8) and its is of same size.
5. a kind of magnetorheological overload of permanent-magnet-field protects multi-disc type shaft coupling according to claim 1, feature exists
In: magneto-rheological grease (4) the internal magnetization particle is carbonyl iron dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140219.4A CN109869420A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140219.4A CN109869420A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109869420A true CN109869420A (en) | 2019-06-11 |
Family
ID=66919197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910140219.4A Pending CN109869420A (en) | 2019-02-26 | 2019-02-26 | A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109869420A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594315A (en) * | 2019-08-19 | 2019-12-20 | 南京理工大学 | Permanent magnet excited magnetorheological overload safety protection multilayer multi-disc type coupling |
| CN114198425A (en) * | 2022-01-25 | 2022-03-18 | 江苏省特种设备安全监督检验研究院 | Double-shear magnetorheological clutch under permanent magnet excitation |
| CN114382804A (en) * | 2022-01-25 | 2022-04-22 | 江苏省特种设备安全监督检验研究院 | Double-shaft independently controllable single-disc brake based on double-coil excitation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4844220A (en) * | 1986-02-26 | 1989-07-04 | Shinko Electric Co., Ltd. | Torque limiter |
| JPH01266325A (en) * | 1988-04-13 | 1989-10-24 | Railway Technical Res Inst | Power transmission device using magnetic substance in viscous fluid and device therefor |
| CN102130518A (en) * | 2011-03-28 | 2011-07-20 | 天津理工大学 | Four-working-side coreless generator |
| CN103174771A (en) * | 2012-07-31 | 2013-06-26 | 中国矿业大学 | Multi-disc type magnetorheological fluid clutch |
| CN205479006U (en) * | 2016-02-26 | 2016-08-17 | 武汉理工大学 | It becomes shaft coupling to mix bellows type magnetic current |
-
2019
- 2019-02-26 CN CN201910140219.4A patent/CN109869420A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4844220A (en) * | 1986-02-26 | 1989-07-04 | Shinko Electric Co., Ltd. | Torque limiter |
| JPH01266325A (en) * | 1988-04-13 | 1989-10-24 | Railway Technical Res Inst | Power transmission device using magnetic substance in viscous fluid and device therefor |
| CN102130518A (en) * | 2011-03-28 | 2011-07-20 | 天津理工大学 | Four-working-side coreless generator |
| CN103174771A (en) * | 2012-07-31 | 2013-06-26 | 中国矿业大学 | Multi-disc type magnetorheological fluid clutch |
| CN205479006U (en) * | 2016-02-26 | 2016-08-17 | 武汉理工大学 | It becomes shaft coupling to mix bellows type magnetic current |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594315A (en) * | 2019-08-19 | 2019-12-20 | 南京理工大学 | Permanent magnet excited magnetorheological overload safety protection multilayer multi-disc type coupling |
| CN114198425A (en) * | 2022-01-25 | 2022-03-18 | 江苏省特种设备安全监督检验研究院 | Double-shear magnetorheological clutch under permanent magnet excitation |
| CN114382804A (en) * | 2022-01-25 | 2022-04-22 | 江苏省特种设备安全监督检验研究院 | Double-shaft independently controllable single-disc brake based on double-coil excitation |
| CN114382804B (en) * | 2022-01-25 | 2023-05-23 | 江苏省特种设备安全监督检验研究院 | Double-shaft independent controllable single-disc brake based on double-coil excitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109737154A (en) | A kind of magnetorheological overload protection single disc-type shaft coupling of permanent-magnet-field | |
| CN109869420A (en) | A kind of magnetorheological overload protection multi-disc type shaft coupling of permanent-magnet-field | |
| CN101994768B (en) | Permanent magnet type magnetorheological fluid ultimate torque coupling | |
| CN109027046B (en) | Small-size large-controllable-range magnetorheological clutch | |
| CN103607097B (en) | A kind of square position type magnetism-gathering magnetic line structure for permanent magnetic vortex drive device | |
| CN101907138B (en) | Power consumption-free permanent magnet-excited magnetorheological clutch | |
| CN109869418A (en) | A kind of magnetorheological overload protection drum-type shaft coupling of permanent-magnet-field | |
| CN106838062B (en) | A kind of Y type brake disc magnetic rheological brake | |
| CN201412460Y (en) | Drive device based on magnetorheological fluid | |
| CN106884898B (en) | A kind of squash type torque magnetic rheological clutch | |
| CN101701611A (en) | Breakdown torque coupler | |
| CN205479006U (en) | It becomes shaft coupling to mix bellows type magnetic current | |
| CN202625690U (en) | Magneto rheological clutch electric | |
| CN208619552U (en) | A kind of novel magnetic rheological clutch with annular gap | |
| CN102297213B (en) | Multi-plate magnetorheological soft start device | |
| CN101783576A (en) | Permanent-magnet speed governor | |
| CN111577787A (en) | Magnetorheological clutch | |
| CN103248197A (en) | Magnetorheological fluid power coupler | |
| CN103490589A (en) | Coaxial sleeve type permanent magnet eddy-current coupling with magnetic coagulation type magnetic circuit structure | |
| CN101592195A (en) | Transmission device based on magnetic flow liquid | |
| CN109854637B (en) | Permanent magnet excited torque controllable magneto-rheological overload protection safety coupling | |
| CN203457031U (en) | Flat plate type magnet-gathering type magnetic circuit structure for permanent magnetic eddy current transmission device | |
| CN114198425B (en) | Double-shearing magneto-rheological clutch under permanent magnet excitation | |
| CN110594315A (en) | Permanent magnet excited magnetorheological overload safety protection multilayer multi-disc type coupling | |
| CN201656743U (en) | Permanent magnet speed regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190611 |