CN102287499A - Magnetorheological fluid-based controllable stepless speed change system - Google Patents
Magnetorheological fluid-based controllable stepless speed change system Download PDFInfo
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- CN102287499A CN102287499A CN2011101625872A CN201110162587A CN102287499A CN 102287499 A CN102287499 A CN 102287499A CN 2011101625872 A CN2011101625872 A CN 2011101625872A CN 201110162587 A CN201110162587 A CN 201110162587A CN 102287499 A CN102287499 A CN 102287499A
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- shaft
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- 239000012530 fluid Substances 0.000 title abstract description 3
- 239000007788 liquid Substances 0.000 claims description 31
- 230000005389 magnetism Effects 0.000 claims description 14
- 239000000523 sample Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract 3
- 238000002955 isolation Methods 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Friction Gearing (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a magnetorheological fluid-based controllable stepless speed change system, which comprises a driving shaft, a driven shaft, a magnetic isolation hub, a driven friction piece and a driving friction piece, wherein the driving friction piece is fixed on a friction piece magnetic isolation ring; the periphery of the friction piece magnetic isolation ring is provided with an excitation coil; the driving shaft and the driven shaft are fixed between an upper box body and a lower box body which are buckled through a driving shaft bearing and a driven shaft bearing; the excitation coil is arranged in grooves of the upper and lower box bodies; two outer interfaces of the excitation coil is connected with a direct current voltage regulator through a current-limiting resistor R; a rotating speed sensor is arranged outside the driven shaft; a voltage amplifier is connected to the rotating speed sensor; a potentiometer is connected to the voltage amplifier and is connected in series with a power amplifier; and a servo motor is connected to the power amplifier and is connected with the direct current voltage regulator through a speed changer. The current intensity is changed by changing voltage, so that the magnetic field intensity is changed, and stepless change of a rotating speed of an output shaft is realized. The system has a simple structure, high stability and a good using effect.
Description
Technical field
The present invention relates to a kind of stepless speed variator system, especially a kind of controlled stepless speed variator system that transmits big torque based on magnetic flow liquid.
Background technique
Magnetic flow liquid is as a kind of intellectual material, its rheological properties generation rapid change under the effect of externally-applied magnetic field, can present the state of similar solid by the good liquid state Millisecond viscosity increase at short notice of rheological properties, be recovered to flowable liquid again in case lose magnetic field.In recent years, because its superior rheological properties in that certain application has been arranged aspect soft start and the damping, also begins to develop to some extent in the stepless speed regulation field.U.S. Pat 005779013, Torque transfer apparatus using magnetorheological fluids magnetic flow liquid torquematic transmission, announced a kind of multi-disc type torque transmitter, there is the magnetic flow liquid in a plurality of disk radial clearances to participate in transmission of power, can transmits bigger torque.Domestic patent CN1523251A discloses a kind of magneto-rheological stepless speed changer of V font rotor structure, adopts two V structures, and is simple in structure.Domestic patent CN101793312A discloses a kind of multi-disc type magneto-rheological stepless speed changer, utilize active friction plate and the magnetic flow liquid in the movable friction plate gap to come transmitting torque, though can change output speed by regulating size of current, but can not control the speed of output, have randomness and blindness, can not realize stepless change truly.Increase along with the operating time, the temperature of magnetic flow liquid medium will increase, stability can reduce, the performance of adding magnetic flow liquid also can be subjected to the influence of other accidentalia, this just must cause the random variation in certain unknown scope of its output speed, therefore poor stability is very restricted in commercial Application.
Summary of the invention
Technical problem: the objective of the invention is to overcome the deficiency in the prior art, a kind of strong, effective controlled stepless speed variator system based on magnetic flow liquid simple in structure, stable is provided.
Technological scheme: the controlled stepless speed variator system based on magnetic flow liquid of the present invention, comprise driving shaft, with the driven shaft of driving shaft on same axis, driven shaft is provided with every magnetic hub, be provided with from movable friction plate every magnetic hub, with the active friction plate that plugs together mutually from movable friction plate, active friction plate with from the gap of movable friction plate, be sealed with magnetic flow liquid, active friction plate is fixed on the friction plate magnetism resistent ring, the periphery of friction plate magnetism resistent ring is provided with field coil, described driving shaft and driven shaft respectively through drive shaft bearing and driven shaft outer bearing be fixed on be interlocked on, between the lower box, field coil is located at, in the groove of lower box, main, be provided with the left side that is separately fixed on driving shaft and the friction plate magnetism resistent ring left side from the left side of movable friction plate every the magnetic side plate, main, be provided with from the right side of movable friction plate be fixed on friction plate magnetism resistent ring right side the right side every the magnetic axis bearing, the right driven shaft inner bearing that between magnetic axis bearing and driven shaft, is provided with, the driving shaft and the driven shaft outside are respectively equipped with and are fixed on, driving shaft capping on the lower box and driven shaft capping, two sockets of described field coil are connected with dc voltage regulator by current-limiting resistance R, the driven shaft outside is provided with speed probe, be connected with voltage amplifier on the speed probe, be connected with potentiometer on the voltage amplifier, voltage amplifier is in series with power amplifier, be connected with actuating motor on the power amplifier, actuating motor is connected with dc voltage regulator through speed changer.
Beneficial effect: owing to adopted technique scheme, with magnetic flow liquid as the transmission of power medium, thereby change electric current [strength change magnetic intensity by changing voltage swing, and then the viscosity of magnetic flow liquid and yield stress are changed, realize the stepless variation of output shaft rotating speed.Realized stepless change truly, its output speed can be between minimum value and maximum value regulated at will.Control by output speed, improved the stability of output speed driven shaft.Field coil does not need brush equipment, and no electrical spark goes for electrical spark is had the occasion of insulation request, as under the coal mine, the floating factory building that combustible dust is arranged.It is simple in structure, stability is strong, using effect is good, has practicability widely.
Description of drawings
Fig. 1 is a magnetic flow liquid stepless speed variator system structural drawing of the present invention.
Among Fig. 1: 1 speed probe, 2 potentiometers, 3 voltage amplifiers, 4 power amplifiers, 5 actuating motors, 6 speed changers, 7 dc voltage regulators, 8 magnetic flow liquid transmission devices.
Fig. 2 is magnetic flow liquid transmission structures figure of the present invention.
Among Fig. 2: 8-1 driving shaft, 8-2 driving shaft circlip, 8-3 drive shaft bearing, the capping of 8-4 driving shaft, the 8-5 upper box, a 8-6 left side is every the magnetic side plate, 8-7 friction plate magnetism resistent ring, 8-8 active friction plate, 8-9 are from movable friction plate, and the 8-10 right side is every the magnetic axis bearing, the 8-11 flat key, 8-12 driven shaft outer bearing, 8-13 driven shaft circlip, 8-14 driven shaft, the capping of 8-15 driven shaft, 8-16 driven shaft inner bearing, 8-17 be every magnetic hub, the 8-18 lower box, the 8-19 field coil, the 8-20 seal ring, 8-21 magnetic flow liquid, 8-22
ORunddichtringO, the 8-23 fixed disc.
Embodiment
Below in conjunction with figure one embodiment of the present of invention are further described:
As shown in Figure 1, the controlled stepless speed variator system based on magnetic flow liquid of the present invention mainly is made up of with the feedback control circuit that links to each other with magnetic flow liquid transmission device 8 magnetic flow liquid transmission device 8.Magnetic flow liquid transmission device 8 comprises driving shaft 8-1, with the driven shaft 8-14 of driving shaft 8-1 on same axis, driven shaft 8-14 is provided with every magnetic hub 8-17, be provided with from movable friction plate 8-9 every magnetic hub 8-17, with the active friction plate 8-8 that plugs together mutually from movable friction plate 8-9, active friction plate 8-8 with from the gap of movable friction plate 8-9, be sealed with magnetic flow liquid 8-21, active friction plate 8-8 is fixed on the friction plate magnetism resistent ring 8-7, the periphery of friction plate magnetism resistent ring 8-7 is provided with field coil 8-19, driving shaft 8-1 and driven shaft 8-14 respectively through drive shaft bearing 8-3 and driven shaft outer bearing 8-12 be fixed on be interlocked on, lower box 8-5, between the 8-18, field coil 8-19 is located at, lower box 8-5, in the groove of 8-18, main, from movable friction plate 8-8, the left side of 8-9 is provided with the left side that is separately fixed on driving shaft 8-1 and the friction plate magnetism resistent ring 8-7 left side every magnetic side plate 8-6, main, from movable friction plate 8-8, the right side of 8-9 be provided be fixed on friction plate magnetism resistent ring 8-7 right side the right side every magnetic axis bearing 8-10, the right driven shaft inner bearing 8-16 that between magnetic axis bearing 8-10 and driven shaft 8-14, is provided with, the driving shaft 8-1 and the driven shaft 8-14 outside are respectively equipped with and are fixed on, lower box 8-5, driving shaft capping 8-4 on the 8-18 and driven shaft capping 8-15, drive shaft bearing 8-3 and driven shaft outer bearing 8-12 two ends are respectively equipped with driving shaft circlip 8-2 and driven shaft circlip 8-13, cooperate with driven shaft 8-14 by flat key 8-11 every magnetic hub 8-17, friction plate magnetism resistent ring 8-7 two ends be provided with respectively with a left side every magnetic side plate 8-6 and the right seal ring 8-20 that fits every magnetic axis bearing 8-10, every magnetic hub 8-17 two ends be provided with respectively with a left side every magnetic side plate 8-6 with rightly fit every magnetic axis bearing 8-10
ORunddichtringO 8-22 is fixed on the driving shaft 8-1 by fixed disc 8-23 every the left end of magnetic hub 8-17.The feedback control circuit that links to each other with magnetic flow liquid transmission device 8 is made up of speed probe 1, potentiometer 2, voltage amplifier 3, power amplifier 4, actuating motor 5, gearbox 6 and dc voltage regulator 7 successively.Speed probe 1 is located at the outside of driven shaft 8-14, speed probe 1 connects voltage amplifier 3, and voltage amplifier 3 connects potentiometer 2, voltage amplifier 3 series connection power amplifiers 4, power amplifier 4 connects actuating motor 5, and actuating motor 5 is connected with dc voltage regulator 7 through speed changer 6.Two sockets of the field coil 8-19 of magnetic flow liquid transmission device 8 connect dc voltage regulator 7 by current-limiting resistance R, realize the stepless speed regulation control of magnetic flow liquid transmission device 8.
During work, the rotating speed of driven shaft 8-14
n By potentiometer 2 with voltage signal
u r Form given, this voltage swing
u r The rotating speed that obtains with expectation
nDefinite function relation is arranged, promptly
u r =f (n), concrete function relation is by the parameter decision of speed probe 1.The actual speed of driven shaft 8-14 detects and changes into voltage signal by speed probe 1
u f When system under agitation or be subjected to the influence of temperature variation of magnetic flow liquid 8-21, the actual speed of driven shaft 8-14 will depart from given rotating speed, this moment, comparing element carried out given signal and feedback signal comprehensively relatively to determine whether the direction of deviation and deviation, voltage amplifier 3 and power amplifier 4 amplify deviation signal and drive actuating motor 5 works, actuating motor 5 is regulated the size that dc voltage regulator 7 contacts change output voltage U after by speed changer 6 speed changes, thereby change the magnetic field size of size of current and then change field coil, finally change the viscosity and the yield stress of magnetic flow liquid, can change the rotating speed size of driven shaft.The effect of current-limiting resistance R is the size of current in the limiting circuit.Wherein,
μ f =
μ r The time,
Δ μ=
μ r -
μ f =0, the contact of dc voltage regulator 7 is motionless;
μ f Decline is output speed when reducing,
Δ μ=
μ r -
μ f ＞0, the output voltage of dc voltage regulator 7 will increase, thereby improve output speed;
μ f When rising is the output speed increase,
Δ μ=
μ r -
μ f ＜0, the output voltage of dc voltage regulator 7 will reduce, thereby reduce output speed.
Claims (1)
1. controlled stepless speed variator system based on magnetic flow liquid, comprise driving shaft (8-1), with the driven shaft (8-14) of driving shaft (8-1) on same axis, driven shaft (8-14) is provided with every magnetic hub (8-17), be provided with from movable friction plate (8-9) every magnetic hub (8-17), with the active friction plate (8-8) that plugs together mutually from movable friction plate (8-9), active friction plate (8-8) with from the gap of movable friction plate (8-9), be sealed with magnetic flow liquid (8-21), active friction plate (8-8) is fixed on the friction plate magnetism resistent ring (8-7), the periphery of friction plate magnetism resistent ring (8-7) is provided with field coil (8-19), it is characterized in that: described driving shaft (8-1) and driven shaft (8-14) respectively through drive shaft bearing (8-3) and driven shaft outer bearing (8-12) be fixed on be interlocked on, lower box (8-5,8-18), field coil (8-19) is located at, lower box (8-5, in groove 8-18), main, from movable friction plate (8-8, left side 8-9) is provided with the left side that is separately fixed on driving shaft (8-1) and friction plate magnetism resistent ring (8-7) left side every magnetic side plate (8-6), main, from movable friction plate (8-8, right side 8-9) be provided be fixed on friction plate magnetism resistent ring (8-7) right side the right side every magnetic axis bearing (8-10), the right side is provided with driven shaft inner bearing (8-16) between magnetic axis bearing (8-10) and driven shaft (8-14), the driving shaft (8-1) and driven shaft (8-14) outside are respectively equipped with and are fixed on, lower box (8-5, driving shaft capping (8-4) 8-18) and driven shaft capping (8-15); Two sockets of described field coil (8-19) are connected with dc voltage regulator (7) by current-limiting resistance R, driven shaft (8-14) outside is provided with speed probe (1), be connected with voltage amplifier (3) on the speed probe (1), be connected with potentiometer (2) on the voltage amplifier (3), voltage amplifier (3) is in series with power amplifier (4), be connected with actuating motor (5) on the power amplifier (4), actuating motor (5) is connected with dc voltage regulator (7) through speed changer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162587 CN102287499B (en) | 2011-06-17 | 2011-06-17 | Magnetorheological fluid-based controllable stepless speed change system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162587 CN102287499B (en) | 2011-06-17 | 2011-06-17 | Magnetorheological fluid-based controllable stepless speed change system |
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| Publication Number | Publication Date |
|---|---|
| CN102287499A true CN102287499A (en) | 2011-12-21 |
| CN102287499B CN102287499B (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110162587 Expired - Fee Related CN102287499B (en) | 2011-06-17 | 2011-06-17 | Magnetorheological fluid-based controllable stepless speed change system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734410A (en) * | 2012-06-28 | 2012-10-17 | 中国矿业大学 | Magnetorheological fluid continuously variable transmission |
| CN103591234A (en) * | 2013-11-30 | 2014-02-19 | 重庆理工大学 | Wedge-shaped extrusion soft start device based on magnetorheological fluid and shape memory alloy |
| CN104779753A (en) * | 2015-03-23 | 2015-07-15 | 中国矿业大学 | Coal mining machine motor torque axis overload protecting device based on magneto-rheological technology |
| CN107830135A (en) * | 2017-11-13 | 2018-03-23 | 蒋志斌 | Double star surges buncher |
| CN113551866A (en) * | 2021-08-19 | 2021-10-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Collision detection system and method and air intake and exhaust test detection system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823309A (en) * | 1997-05-23 | 1998-10-20 | General Motors Corporation | Magnetorheological transmission clutch |
| EP0882904A1 (en) * | 1997-06-02 | 1998-12-09 | General Motors Corporation | Magnetorheological fluid fan clutch |
| DE19939356A1 (en) * | 1998-08-19 | 2000-05-04 | Dana Corp | Infinitely variable transmission |
| CN1523251A (en) * | 2003-09-08 | 2004-08-25 | 重庆大学 | Magnetorheological continuously variable transmission |
| CN101793312A (en) * | 2010-02-11 | 2010-08-04 | 中国矿业大学 | Magneto-rheological stepless speed changer |
| CN202152836U (en) * | 2011-06-17 | 2012-02-29 | 中国矿业大学 | Controllable stepless speed change system based on magnetorheological fluid |
-
2011
- 2011-06-17 CN CN 201110162587 patent/CN102287499B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823309A (en) * | 1997-05-23 | 1998-10-20 | General Motors Corporation | Magnetorheological transmission clutch |
| EP0882904A1 (en) * | 1997-06-02 | 1998-12-09 | General Motors Corporation | Magnetorheological fluid fan clutch |
| DE19939356A1 (en) * | 1998-08-19 | 2000-05-04 | Dana Corp | Infinitely variable transmission |
| CN1523251A (en) * | 2003-09-08 | 2004-08-25 | 重庆大学 | Magnetorheological continuously variable transmission |
| CN101793312A (en) * | 2010-02-11 | 2010-08-04 | 中国矿业大学 | Magneto-rheological stepless speed changer |
| CN202152836U (en) * | 2011-06-17 | 2012-02-29 | 中国矿业大学 | Controllable stepless speed change system based on magnetorheological fluid |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734410A (en) * | 2012-06-28 | 2012-10-17 | 中国矿业大学 | Magnetorheological fluid continuously variable transmission |
| CN102734410B (en) * | 2012-06-28 | 2014-09-24 | 中国矿业大学 | Magnetorheological fluid continuously variable transmission |
| CN103591234A (en) * | 2013-11-30 | 2014-02-19 | 重庆理工大学 | Wedge-shaped extrusion soft start device based on magnetorheological fluid and shape memory alloy |
| CN103591234B (en) * | 2013-11-30 | 2016-03-09 | 重庆理工大学 | Based on the wedge shaped squeeze soft starting device of magnetic flow liquid and marmem |
| CN104779753A (en) * | 2015-03-23 | 2015-07-15 | 中国矿业大学 | Coal mining machine motor torque axis overload protecting device based on magneto-rheological technology |
| CN107830135A (en) * | 2017-11-13 | 2018-03-23 | 蒋志斌 | Double star surges buncher |
| CN113551866A (en) * | 2021-08-19 | 2021-10-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Collision detection system and method and air intake and exhaust test detection system |
| CN113551866B (en) * | 2021-08-19 | 2023-06-02 | 中国空气动力研究与发展中心低速空气动力研究所 | Collision detection system and method, and air intake and exhaust test detection system |
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| CN102287499B (en) | 2013-04-24 |
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Granted publication date: 20130424 |