CN111623051A - High-power moment-adjustable disc type magnetorheological fluid coupling - Google Patents
High-power moment-adjustable disc type magnetorheological fluid coupling Download PDFInfo
- Publication number
- CN111623051A CN111623051A CN202010428754.2A CN202010428754A CN111623051A CN 111623051 A CN111623051 A CN 111623051A CN 202010428754 A CN202010428754 A CN 202010428754A CN 111623051 A CN111623051 A CN 111623051A
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- China
- Prior art keywords
- magnetorheological fluid
- input shaft
- driving
- discs
- disc
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D37/00—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive
- F16D37/02—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive the particles being magnetisable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D37/00—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive
- F16D2037/001—Electric arrangements for clutch control
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Disclosed is a high-power moment adjustable disc type magnetorheological fluid coupling, which comprises: a shaft sleeve (4); the input shaft (3) and the output shaft (11), the input shaft is positioned in the shaft sleeve; the bearing (1) is positioned between the shaft sleeve and the input shaft; the driving device comprises a plurality of driving discs (12), wherein inner isolation magnetic rings (13) are arranged between adjacent driving discs, the outer diameter of each driving disc is larger than that of each inner isolation magnetic ring, the driving discs, the inner isolation magnetic rings and an input shaft are coaxially and fixedly connected, and outer isolation magnetic rings (7) are sleeved outside the driving discs; the driven discs (6) are sleeved on the inner magnetic isolation ring between the driving discs, magnetorheological fluid (10) is arranged in gaps between the driven discs and the driving discs, and the driven discs, the outer magnetic isolation ring, and flanges of the shaft sleeves are fixedly connected with the output shaft; the excitation coils (9) are distributed along the circumferential direction of a disc structure formed by the outer magnetism isolating ring and the driven disc; and a control system that controls the current of the exciting coil. The method and the device realize the functions of limiting transmission torque protection and adjusting the maximum transmission torque.
Description
Technical Field
The disclosure relates to a coupler, in particular to a high-power moment-adjustable disc type magnetorheological fluid coupler.
Background
The coupling is one of the most common parts in mechanical transmission systems. In the working process of large mechanical equipment, complex loads such as impact, overload and the like are often borne, and the power equipment is often damaged or fatigued. The traditional coupling is used for dealing with various working conditions by selecting different damping materials or changing the structure, and the unconventional torque transmission device plays a role in controlling output torque and damping by introducing liquid or magnetic field media. But the former can not achieve the purpose of controlling the transmission system; the latter has the contradiction of difficult adjustment between the size, the weight and the working performance, and has the problems of oil leakage, low efficiency, high maintenance cost, broken shaft of a high-speed shaft of the speed reducer caused by the dynamic balance problem of the liquid couple, pollution caused by the oil injection of the liquid couple when the system is overloaded and the like.
Magnetorheological fluid is introduced into the magnetorheological coupling to serve as a transmission medium, power is transmitted by means of shearing action of the magnetorheological fluid between transmission interfaces, and shearing stress of the magnetorheological fluid can be continuously changed by controlling the intensity of an external magnetic field, so that stepless adjustment of transmission torque and rotation speed is achieved. When overload occurs, the rotor and the stator perform slip motion to realize torque limiting protection. The research on the innovative intelligent material in recent years greatly promotes the application and development of the magnetorheological fluid in the field of mechanical transmission engineering.
The mechanism model applied by the existing magnetorheological fluid transmission device is single, is limited in a small-torque and small-power transmission system, and cannot effectively solve the contradiction between large-torque transmission and light and small device. When the size and the structural form of the magnetorheological torque transmission device are not changed, the torque transmission performance is effectively improved and different working conditions are difficult to meet. The structure and the installation mode of the coupling are greatly different from those of a common coupling, but no proper scheme is provided for the arrangement of the power supply of the device so as to meet the actual engineering requirement.
Disclosure of Invention
At least one embodiment of the disclosure provides a high-power torque-adjustable disc type magnetorheological fluid coupler, which solves the problems of small torque density and poor working condition adaptability of the conventional coupler and realizes the adjustability of maximum transmission torque.
At least one embodiment of the present disclosure provides a moment-adjustable disc magnetorheological fluid coupling, including:
a shaft sleeve;
an input shaft and an output shaft, the input shaft being located within the sleeve;
a bearing located between the shaft sleeve and the input shaft;
the driving discs are coaxially arranged with the input shaft, and are externally sleeved with outer magnetic isolation rings;
the driven discs are sleeved on the inner magnetic isolation ring between the driving discs, the outer circumferential surfaces of the driven discs are flush with the outer circumferential surfaces of the outer magnetic isolation rings, and magnetorheological fluid is arranged in gaps between the driven discs and the driving discs;
the annular coil base is sleeved on a disc structure formed by the outer magnetism isolating ring and the driven disc, an excitation coil is arranged in the coil base, and the outer circumference of the coil base is open;
a housing engaged with the coil base in such a manner as to cover the exciting coil in the coil mount, the housing being fixedly coupled with the flange of the sleeve and the output shaft; and
a control system that controls a current of the exciting coil;
the driving disc, the inner magnetic isolation ring and the input shaft are fixedly connected, and the driven disc, the outer magnetic isolation ring, the flange of the shaft sleeve and the output shaft are fixedly connected.
In some examples, the contact surfaces of the driving disk and the inner magnetic isolation ring are respectively provided with a boss and a groove for mutual embedding and centering.
In some examples, the contact surfaces of the driven disc and the outer magnetism isolating ring are respectively provided with a boss and a groove which are used for mutually embedding and centering.
In some examples, the inner magnetic isolation ring is disposed between the input shaft and the driving disk nearest to the input shaft.
In some examples, an end of the input shaft near the driving disk is mounted with a sealing ring that prevents leakage of the magnetorheological fluid.
In some examples, a transparent cover is fixed on the end part of the shaft sleeve and sleeved on the input shaft.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below.
Fig. 1 is a schematic three-dimensional cross-sectional view of a high-power moment-adjustable disc magnetorheological fluid coupling according to an embodiment of the present disclosure.
Fig. 2 is a plan view of the high-power moment-adjustable disc magnetorheological fluid coupling shown in fig. 1.
Description of reference numerals:
1-a bearing;
2-transparent cover;
3-an input shaft;
4-shaft sleeve;
5-sealing ring;
6-driven disc;
7-outer magnetism isolating ring;
8-a housing;
9-a field coil;
10-magnetorheological fluid;
11-an output shaft;
12-a driving disk;
13-inner magnetic isolation ring;
14-a coil base;
15-screws;
16-bolt.
Detailed Description
Referring to fig. 1 and 2, the high-power moment-adjustable disc type magnetorheological fluid coupling comprises a bearing 1, a transparent cover 2, an input shaft 3, a shaft sleeve 4, a sealing ring 5, a driven disc 6, an outer magnetic isolation ring 7, a shell 8, a magnet exciting coil 9, magnetorheological fluid 10, an output shaft 11, a driving disc 12, an inner magnetic isolation ring 13 and a coil base 14. The driven disk 6 and the driving disk 12 may be made of Q235 steel. The outer magnetism isolating ring 7 and the inner magnetism isolating ring 13 can adopt aluminum alloy.
The input shaft 3 is located within a sleeve 4. One or more bearings 1 are located between the shaft sleeve 4 and the input shaft 3. The transparent cover 2 is sleeved on the input shaft 3 and fixed at the end part of the shaft sleeve 4 through a screw 15 so as to realize the sealing of the gap between the input shaft 3 and the shaft sleeve 4. The inner ring of the transparent cover 2 is provided with a dynamic seal ring to prevent dust from entering the magnetorheological fluid coupling.
The driving discs 12 are provided with a plurality of inner magnetic isolation rings 13, and an inner magnetic isolation ring 13 is arranged between every two adjacent driving discs 12. The input shaft 3, the driving disk 12 and the inner magnetic isolation ring 13 are coaxially arranged. Furthermore, an inner magnetic isolation ring 13 is arranged between the input shaft 3 and the driving disk 12 closest to the input shaft. The outer diameter of the driving disc 12 is larger than that of the inner magnetic isolation ring 13. The driving disk 12 is externally sleeved with an external magnetism isolating ring 7.
The driven discs 6 are provided with a plurality of driven discs 6, and the driven discs 6 are sleeved on inner magnetic isolation rings 13 between the driving discs 12. The outer circumferential surface of the driven disc 6 is flush with the outer circumferential surface of the outer magnetism isolating ring 7. The magnetorheological fluid 10 is arranged in a gap between the driven disc 6 and the driving disc 12. In general, the gaps for containing the magnetorheological fluid 10 are distributed in the axial direction and the circumferential direction of the magnetorheological fluid coupling, that is, the gaps between the driven discs 6 and the driving discs 12 are a multilayer annular labyrinth cavity, so that the area of the magnetorheological fluid passing through by electromagnetism is increased, and the magnetorheological fluid coupling has higher torque transmission capacity under the condition of magnetic flux.
The width of a gap formed between the driven disc 6 and the driving disc 12 can be controlled through the processing thickness of the outer magnetic isolation ring 7 and the inner magnetic isolation ring 13, the magnetic permeability of the magnetorheological fluid in the gap is inversely related to the width of the gap, the magnetic permeability of the magnetorheological fluid in the gap is an important parameter of the magnetorheological fluid coupler, and the magnetic permeability is directly related to the torque which can be transmitted by the magnetorheological fluid coupler after magnetism is applied.
In addition, the contact surfaces of the driven disk 6 and the outer magnetism isolating ring 7 are respectively provided with a boss and a groove which are used for mutual embedding and centering, and the contact surfaces of the driving disk 12 and the inner magnetism isolating ring 13 are respectively provided with a boss and a groove which are used for mutual embedding and centering. Make the magnetorheological suspensions shaft coupling more convenient to install the location like this, have more convenient expansibility simultaneously, control the input unit of the biggest transmission torque ability in order to adapt to different abilities of magnetorheological suspensions shaft coupling promptly through the quantity of increase and decrease driving disk 6, 12.
And the annular coil mounting seat 14 is sleeved on a disc structure formed by the driven disc 6 and the outer magnetism isolating ring 7, the coil mounting seat 14 is internally provided with an excitation coil 9, and the outer circumference of the coil mounting seat 14 is opened. The housing 8 is engaged with the coil mounting seat 14 in such a manner as to cover the exciting coil 9 in the coil mounting seat 14, and the housing 14 and the flange of the boss 4 and the output shaft 11 are fixedly connected by bolts 16.
The input shaft 3, the driving disc 12 and the inner magnetic isolation ring 13 can be fixedly connected through screws 15 to form an input end, and the flange of the shaft sleeve 4, the driven disc 6, the outer magnetic isolation ring 7 and the output shaft 11 can be fixedly connected through screws 15 to form an output end. The input end and the output end realize relative rotation through a bearing 1. In addition, the end part of the input shaft 3 close to the driving disc 12 is provided with a sealing ring 5, so that the leakage of the magnetorheological fluid is prevented. The outer end of the output shaft 11 is processed into a mode that the output shaft can be connected with a standard quincunx coupler so as to transmit torque.
After the exciting coil 9 at the output end is connected with current, the power torque is transmitted to the driving disc 12 through the input shaft 3, then is transmitted to the driven disc 6 through the magnetorheological fluid 10 in a curing mode, and finally is transmitted to the load end through the output shaft 11, and the current of the exciting coil 9 can be controlled through the control system, so that the output torque can be adjusted.
The working process of the high-power moment-adjustable disc type magnetorheological fluid coupling is as follows: the exciting coil 9 is connected with an input power supply through a high-speed slip ring, and the input current of the exciting coil 9 can be controlled by a control system. When the excitation coil 9 is excited by a fixed current, the excitation coil 9 generates a magnetic field, at the moment, ferromagnetic particles in the magnetorheological fluid 10 are distributed in a paramagnetic field to form a magnetic linkage, and the driving disc 12 and the driven disc 6 rotate together by the shear stress in the fluid, so that the power of the input end is transmitted to the output end. When the magnetorheological fluid 10 in the multilayer annular labyrinth cavity is in a saturated magnetic field state, the critical limit state of relative rotation is achieved between the input end and the output end, the maximum output torque of the magnetorheological fluid coupler in the stable working state is obtained, the performance directly reflects the limit bearing capacity of the magnetorheological fluid transmission device, and the actual working limit range of the magnetorheological fluid transmission device is determined. The limit transmission torque (which can exceed 600 N.m) of the magnetorheological fluid coupling is determined by the disc numbers of the driven disc 6, the outer magnetic isolation ring 7, the driving disc 12 and the inner magnetic isolation ring 13 and the current of the magnet exciting coil 9. When the load reaches the limit transmission torque, the input end and the output end automatically generate slip motion due to the viscous action of the magnetorheological fluid, so that the rigidity and the damping of the magnetorheological fluid coupler are changed, and the effect of limiting the impact load is achieved. When the limit transmission torque of the magnetorheological fluid coupling needs to be changed according to different working conditions, the limit transmission torque can be realized through the following two ways:
(1) the current of the magnet exciting coil 9 is adjusted by a control system to change the magnetic field intensity, so that the yield stress of the magnetorheological fluid 10 is changed, and the output torque is adjusted;
(2) the maximum torque transmission capacity of the magnetorheological fluid coupling is changed by increasing or decreasing the number of the driven discs 6 and the driving discs 12.
As mentioned above, the high-power moment-adjustable disc type magnetorheological fluid coupling disclosed by the invention has the advantages that the components are disc and shaft type components, the assembly is more convenient, the processing cost is lower, the processing precision is higher, the processing quality is more stable, and the overall manufacturing cost of the magnetorheological fluid coupling is favorably reduced.
Claims (6)
1. A moment-adjustable disc type magnetorheological fluid coupling is characterized by comprising:
a shaft sleeve;
an input shaft and an output shaft, the input shaft being located within the sleeve;
a bearing located between the shaft sleeve and the input shaft;
the driving discs are coaxially arranged with the input shaft, and are externally sleeved with outer magnetic isolation rings;
the driven discs are sleeved on the inner magnetic isolation ring between the driving discs, the outer circumferential surfaces of the driven discs are flush with the outer circumferential surfaces of the outer magnetic isolation rings, and magnetorheological fluid is arranged in gaps between the driven discs and the driving discs;
the annular coil base is sleeved on a disc structure formed by the outer magnetism isolating ring and the driven disc, an excitation coil is arranged in the coil base, and the outer circumference of the coil base is open;
a housing engaged with the coil base in such a manner as to cover the exciting coil in the coil mount, the housing being fixedly coupled with the flange of the sleeve and the output shaft; and
a control system that controls a current of the exciting coil;
the driving disc, the inner magnetic isolation ring and the input shaft are fixedly connected, and the driven disc, the outer magnetic isolation ring, the flange of the shaft sleeve and the output shaft are fixedly connected.
2. The torque-adjustable disc type magnetorheological fluid coupling according to claim 1, wherein the contact surfaces of the driving disc and the inner magnetic isolation ring are respectively provided with a boss and a groove for mutual embedding and centering.
3. The torque-adjustable disc type magnetorheological fluid coupling according to claim 1, wherein the contact surfaces of the driven disc and the outer magnetism isolating ring are respectively provided with a boss and a groove for mutual embedding and centering.
4. The torque-adjustable disc type magnetorheological fluid coupling according to claim 1, wherein an inner magnetic isolation ring is arranged between the input shaft and the driving disc closest to the input shaft.
5. The moment-adjustable disc type magnetorheological fluid coupling according to claim 1 or 4, wherein a seal ring for preventing the magnetorheological fluid from leaking is mounted at the end part of the input shaft close to the driving disc.
6. The moment-adjustable disc type magnetorheological fluid coupling according to claim 1, wherein a transparent cover sleeved on the input shaft is fixed at the end part of the shaft sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428754.2A CN111623051A (en) | 2020-05-20 | 2020-05-20 | High-power moment-adjustable disc type magnetorheological fluid coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428754.2A CN111623051A (en) | 2020-05-20 | 2020-05-20 | High-power moment-adjustable disc type magnetorheological fluid coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111623051A true CN111623051A (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010428754.2A Pending CN111623051A (en) | 2020-05-20 | 2020-05-20 | High-power moment-adjustable disc type magnetorheological fluid coupling |
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| CN (1) | CN111623051A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117605776A (en) * | 2024-01-23 | 2024-02-27 | 华东交通大学 | Stator built-in magneto-rheological brake |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0879973A1 (en) * | 1997-05-23 | 1998-11-25 | General Motors Corporation | Magnetorheological transmission clutch |
| CN101029664A (en) * | 2007-04-02 | 2007-09-05 | 中国矿业大学 | Magnetic rheological hydraulic flexible starter |
| CN201378498Y (en) * | 2009-03-11 | 2010-01-06 | 李小华 | Silicon steel plate capable of being positioned in stacking form |
| CN102146968A (en) * | 2011-02-18 | 2011-08-10 | 中国矿业大学 | Multiple-disc type magnetorheological brake |
| CN102297213A (en) * | 2011-08-30 | 2011-12-28 | 江苏大学 | Multi-plate magnetorheological soft start device |
| CN102506094A (en) * | 2011-10-27 | 2012-06-20 | 中国矿业大学 | Multi-disc type fine-pitch magnetorheological clutch |
| CN204493499U (en) * | 2015-03-21 | 2015-07-22 | 重庆理工大学 | A kind of marmem helper drive magnetic rheological clutch |
| CN205806266U (en) * | 2016-05-27 | 2016-12-14 | 徐州市旭松新型材料有限公司 | Tension force controls with manual automatic double-control formula magnetic powder cluth |
| CN207705115U (en) * | 2018-01-02 | 2018-08-07 | 浙江美硕电气科技股份有限公司 | Core assembly |
-
2020
- 2020-05-20 CN CN202010428754.2A patent/CN111623051A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0879973A1 (en) * | 1997-05-23 | 1998-11-25 | General Motors Corporation | Magnetorheological transmission clutch |
| CN101029664A (en) * | 2007-04-02 | 2007-09-05 | 中国矿业大学 | Magnetic rheological hydraulic flexible starter |
| CN201378498Y (en) * | 2009-03-11 | 2010-01-06 | 李小华 | Silicon steel plate capable of being positioned in stacking form |
| CN102146968A (en) * | 2011-02-18 | 2011-08-10 | 中国矿业大学 | Multiple-disc type magnetorheological brake |
| CN102297213A (en) * | 2011-08-30 | 2011-12-28 | 江苏大学 | Multi-plate magnetorheological soft start device |
| CN102506094A (en) * | 2011-10-27 | 2012-06-20 | 中国矿业大学 | Multi-disc type fine-pitch magnetorheological clutch |
| CN204493499U (en) * | 2015-03-21 | 2015-07-22 | 重庆理工大学 | A kind of marmem helper drive magnetic rheological clutch |
| CN205806266U (en) * | 2016-05-27 | 2016-12-14 | 徐州市旭松新型材料有限公司 | Tension force controls with manual automatic double-control formula magnetic powder cluth |
| CN207705115U (en) * | 2018-01-02 | 2018-08-07 | 浙江美硕电气科技股份有限公司 | Core assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117605776A (en) * | 2024-01-23 | 2024-02-27 | 华东交通大学 | Stator built-in magneto-rheological brake |
| CN117605776B (en) * | 2024-01-23 | 2024-04-05 | 华东交通大学 | Stator built-in magneto-rheological brake |
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Application publication date: 20200904 |