CN110864055B - Disk type magneto-rheological double clutch - Google Patents
Disk type magneto-rheological double clutch Download PDFInfo
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- CN110864055B CN110864055B CN201911211549.4A CN201911211549A CN110864055B CN 110864055 B CN110864055 B CN 110864055B CN 201911211549 A CN201911211549 A CN 201911211549A CN 110864055 B CN110864055 B CN 110864055B
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- cooling liquid
- shape memory
- outer partition
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- 238000005192 partition Methods 0.000 claims abstract description 103
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 239000000110 cooling liquid Substances 0.000 claims description 64
- 230000017525 heat dissipation Effects 0.000 claims description 59
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 58
- 239000012530 fluid Substances 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 21
- 230000009977 dual effect Effects 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 239000002826 coolant Substances 0.000 description 22
- 230000005540 biological transmission Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011540 sensing material Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002520 smart material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention discloses a disk type magneto-rheological double clutch, which comprises the following components: the first shell and the second shell are fixedly connected in a circumferential fit manner and enclose a closed hollow cylindrical structure; the first outer partition plate and the second outer partition plate are arranged between the first shell and the second shell at intervals, and are fixedly connected with the first shell and the second shell in the circumferential direction; the first excitation coil baffle and the second excitation coil baffle are annular, are coaxially arranged in the first cavity and the second cavity respectively, and enclose a closed first annular cavity and a closed second annular cavity respectively; the first exciting coil and the second exciting coil are coaxially arranged in the first circular cavity and the second circular cavity respectively; a first output disk and a first magnetic input disk; the second output disc and the second magnetic input disc, a plurality of connecting rods, which respectively pass through the first outer baffle plate and the second outer baffle plate in a rotatable way, and the two axial ends of the connecting rods are respectively and fixedly connected with the first magnetic input disc and the second magnetic input disc in the circumferential direction.
Description
Technical Field
The invention relates to the technical field of automobile transmissions, in particular to a disk type magnetorheological double clutch.
Background
The magnetorheological fluid is a stable suspension liquid formed by uniformly dispersing micrometer-sized magnetic polarized particles in a non-magnetic liquid and adding a surfactant. As a typical smart material, the yield stress and viscosity of magnetorheological fluids change with changes in the strength of an applied magnetic field, and the changes are continuously reversible. The Bingham plastic body is a Newtonian liquid with good fluidity and small viscosity under the action of a zero magnetic field, and can increase the viscosity by more than two orders of magnitude and be similar to a solid under the action of a strong magnetic field. By utilizing the special mechanical property of the magnetorheological fluid, the clutch can be controlled by an externally applied magnetic field, and the flexible connection of the transmission part can be realized.
The shape memory alloy is a temperature sensing material with deformation recovery capability and super elasticity, and the specific principle is that the thermoelastic martensite phase of the material is transformed in the deformation process, and the high-temperature austenite phase and the low-temperature martensite phase of the material can show two performances according to different thermodynamic load conditions. The shape memory alloy macroscopically exhibits axial elongation, and if the two axial sections are constrained, a driving force is generated and acts outwards. Shape memory effects are classified into three types, one-way, two-way, and one-way, wherein the one-way memory effect is represented by a shape of a high-temperature phase recovered when heated, and a shape of a low-temperature phase identical in shape and opposite in orientation when cooled.
The existing clutch is basically in direct friction combination, has the defects of low response speed, high noise, easiness in abrasion and the like, and the magnetorheological fluid has the advantages of being simple in structure, low in energy consumption, flexible in combination, high in response speed and the like, and the magnetorheological fluid is enabled to be a research hot spot due to the excellent performance of the magnetorheological fluid, but the magnetorheological fluid needs to work in a certain temperature range, otherwise, the magnetorheological fluid is enabled to be invalid, and the transmission efficiency is reduced.
Disclosure of Invention
The invention designs and develops a disk type magneto-rheological double clutch, and one of the purposes is that magneto-rheological fluid and an exciting coil are arranged in a first cavity and a second cavity to transfer torque, so that the engagement smoothness of a transmission is realized, and power shifting is not interrupted.
And the second purpose is that a first through groove and a second through groove are arranged, and a heat dissipation device is arranged in the first through groove and the second through groove, so that the accelerated heat dissipation of the clutch can be realized.
The technical scheme provided by the invention is as follows:
a disk-type magnetorheological dual clutch comprising:
the first shell and the second shell are fixedly connected in a circumferential fit manner and enclose a closed hollow cylindrical structure;
the first outer partition plate and the second outer partition plate are arranged between the first shell and the second shell at intervals, and are fixedly connected with the first shell and the second shell in the circumferential direction;
the first outer partition plate and the first shell enclose a first cavity, the second outer partition plate and the second shell enclose a second cavity, and magnetorheological fluid is arranged in the first cavity and the second cavity;
the first excitation coil baffle and the second excitation coil baffle are annular, are coaxially arranged in the first cavity and the second cavity respectively, and enclose a closed first annular cavity and a closed second annular cavity respectively;
the first exciting coil and the second exciting coil are coaxially arranged in the first circular cavity and the second circular cavity respectively;
a first output tray disposed within the first cavity proximate the first housing;
the first magnetic input disc is sleeved on the hollow shaft of the first outer partition plate in the first cavity in a matched manner;
a second output tray disposed within the second cavity proximate the second housing;
the second magnetic input disc is sleeved on the hollow shaft of the second outer partition board in the second cavity in a matched manner;
the connecting rods respectively pass through the first outer baffle plate and the second outer baffle plate in a rotatable manner, and the two axial ends of the connecting rods are respectively and fixedly connected with the first magnetic input disc and the second magnetic input disc in the circumferential direction;
the first magnetic input disc and the second magnetic input disc rotate synchronously with the first outer partition plate and the second outer partition plate and can move along the axial direction of the hollow shaft of the first outer partition plate and the hollow shaft of the second outer partition plate respectively;
one end of the first output disc shaft is fixedly connected with the center of the first output disc, and the other end of the first output disc shaft coaxially and rotatably penetrates through the first magnetic input disc, the hollow shaft of the first outer partition plate, the hollow shaft of the second outer partition plate, the second magnetic input disc and the second output disc and penetrates out of the second shell;
one end of the second output disc shaft is fixedly connected with the center of the second output disc, and the other end of the second output disc shaft is coaxially sleeved on the first output disc shaft in a hollow manner and penetrates out of the second shell;
the first output disc and the first magnetic input disc, and the second output disc and the second magnetic input disc can respectively and synchronously rotate in a matching way.
Preferably, the method further comprises:
the first cooling liquid partition plate and the second cooling liquid partition plate are attached to each other and arranged between the first outer partition plate and the second outer partition plate, and form a first annular cooling liquid cavity and a second annular cooling liquid cavity which are concentric and communicated with each other, and a plurality of cylindrical accommodating cavities are formed between the first annular cooling liquid cavity and the second annular cooling liquid cavity in an enclosing mode and used for accommodating the connecting rods.
Preferably, the connecting rod further comprises:
the balance weight is cylindrical, is fixedly sleeved on the connecting rod positioned in the cylindrical accommodating cavity and is integrally formed with the connecting rod;
the plurality of return springs are arranged in the cylindrical accommodating cavity, are respectively and symmetrically sleeved on the connecting rods positioned at two sides of the balance weight, and are in contact with the balance weight at one end and the inner wall of the cylindrical accommodating cavity at the other end;
when the return spring is not elastically deformed, the balance weight is positioned at the center of the cylindrical accommodating cavity.
Preferably, the method further comprises:
the first through grooves are cylindrical, are uniformly arranged along the circumferential direction of the first cooling liquid partition plate, correspond to the first annular cooling liquid cavity in position and penetrate through the first cooling liquid partition plate, the second cooling liquid partition plate, the first outer partition plate and the second outer partition plate;
the plurality of second through grooves are cylindrical, are uniformly arranged along the circumferential direction of the first cooling liquid partition plate, correspond to the second annular cooling liquid cavity in position and penetrate through the first cooling liquid partition plate, the second cooling liquid partition plate, the first outer partition plate and the second outer partition plate;
the plurality of first shape memory alloys are cylindrical and are axially arranged in the first through grooves respectively;
a plurality of second shape memory alloys which are cylindrical and are respectively axially arranged in the second through grooves;
the plurality of first heat dissipation rings are respectively and fixedly sleeved at the two axial ends of the first shape memory alloy;
the second heat dissipation rings are respectively and fixedly sleeved at the two axial ends of the second shape memory alloy;
the plurality of first return springs are respectively sleeved on the first shape memory alloy between the first heat dissipation circular rings;
the plurality of second return springs are respectively sleeved on the second shape memory alloy between the second heat dissipation circular rings;
wherein, each first shape memory alloy is sleeved with two first reset springs, one end of each first reset spring is fixedly connected with the corresponding first heat dissipation ring, and the other end of each first reset spring is fixedly connected with the inner wall of the first through groove; two second reset springs are sleeved on each second shape memory alloy, one end of each second reset spring is fixedly connected with the corresponding second heat dissipation ring, and the other end of each second reset spring is fixedly connected with the inner wall of the second through groove; and
in the initial state, the first heat dissipation ring is completely positioned in the first through groove, and the second heat dissipation ring is completely positioned in the second through groove;
when the first shape memory alloy and the second shape memory alloy are heated, one sides of the first shape memory alloy and the second shape memory alloy, which are close to the first annular cooling liquid cavity and the second annular cooling liquid cavity, are elongated, so that one ends of the corresponding first heat dissipation circular ring and the corresponding second heat dissipation circular ring enter the first annular cooling liquid cavity and the second annular cooling liquid cavity, and the other ends of the corresponding first heat dissipation circular ring and the corresponding second heat dissipation circular ring are still positioned in the corresponding first through groove and the corresponding second through groove;
when the first shape memory alloy and the second shape memory alloy are cooled, one sides of the first shape memory alloy and the second shape memory alloy, which are close to the first cavity and the second cavity, are elongated, so that one ends of the corresponding first heat dissipation circular rings and the corresponding second heat dissipation circular rings enter the first cavity and the second cavity, and the other ends of the corresponding first heat dissipation circular rings and the corresponding second heat dissipation circular rings are still positioned in the corresponding first through grooves and the corresponding second through grooves.
Preferably, the method further comprises:
and the cooling liquid outlet and the cooling liquid inlet are respectively arranged on the first shell and the second shell and are respectively communicated with the first annular cooling liquid cavity.
Preferably, a sealing ring is sleeved at the position of the first output disc shaft penetrating into the hollow shaft of the first outer partition plate, and a sealing ring is sleeved at the position of the hollow shaft penetrating out of the second outer partition plate; and a sealing ring is sleeved at the position where the second output disc shaft penetrates into the second shell.
Preferably, sealing rings are coaxially and fixedly arranged on the first outer partition plate and the second outer partition plate, which are close to two sides of the cylindrical accommodating cavity, and are used for the connecting rod to pass through in a sealing manner.
Preferably, sealing rings are fixedly arranged at the contact positions of the first outer partition plate and the first cooling liquid partition plate and the contact positions of the second outer partition plate and the second cooling liquid partition plate, which correspond to the first through groove and the second through groove, and are used for the sealing penetration of the first shape memory alloy and the second shape memory alloy.
Preferably, the first output disc shaft is rotatable through the first magnetic input disc, the hollow shaft of the first outer partition and the hollow shaft of the second outer partition by bearings; the second output disc shaft is rotatable through the second housing by a bearing.
Preferably, the opposite sides of the first output disc, the first magnetic input disc, the second output disc and the second magnetic input disc are respectively provided with a truncated cone-shaped protrusion and a truncated cone-shaped groove structure which are correspondingly matched.
The beneficial effects of the invention are that
1. The invention provides a disk type magnetorheological double clutch, which is particularly applied to intelligent material magnetorheological fluid to realize the purpose of torque transmission. The characteristic that the magnetorheological fluid can react in millisecond time is utilized, so that the accurate and effective control of the clutch operation is realized; the relative current in the exciting coils on two sides is controlled, so that the uninterrupted power shifting of the transmission is realized.
2. According to the disk type magnetorheological double clutch provided by the invention, an irregular magnetorheological fluid cavity is formed between the output disk and the input disk, and compared with a common disk type magnetorheological clutch, the disk type magnetorheological double clutch can transmit larger torque.
3. The invention provides an input disc assembly capable of moving axially, which is close to an output disc of a clutch in operation under the action of attractive force of an exciting coil, so that a gap between the input disc assembly and the output disc is reduced, and the transmitted torque range is effectively enlarged; meanwhile, the input and output discs of the other clutch can be far away, so that the possibility of a certain torque is avoided; and when the input disc assembly is not in operation, the spring can be utilized to realize automatic reset of the input disc assembly.
4. The invention provides a cooling liquid channel positioned in the center of the clutch for cooling liquid to circulate, thereby realizing liquid cooling of the clutch; meanwhile, the heat-dissipating device formed by the shape memory alloy of the temperature sensing material and the heat-dissipating ring is utilized to convert heat energy into mechanical energy for driving the heat-dissipating ring to axially move, and the heat-receiving area of the heat-dissipating ring after the heat-dissipating ring moves is larger, so that the accelerated heat dissipation of the clutch can be realized, and the problem of magnetorheological fluid failure under the condition of overhigh temperature is effectively solved.
Drawings
Fig. 1 is a schematic cross-sectional structure of a disk-type magnetorheological dual clutch according to the present invention.
Fig. 2 is a schematic structural view of the first coolant separator according to the present invention.
Fig. 3 is a schematic structural view of the first outer separator according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
As shown in fig. 1-3, the present invention provides a disk-type magnetorheological dual clutch, comprising: the first shell 110 and the second shell 120 are fixedly connected in a circumferential fit manner and enclose a closed hollow cylindrical structure, and the first shell 110 is connected with the power input shaft; a first outer partition 130 and a second outer partition 140 are provided at intervals between the first housing 110 and the second housing 120, and are fixedly connected with the first housing 110 and the second housing 120 in the circumferential direction; the first outer partition 130 and the first housing 110 enclose a first cavity 111, the second outer partition 140 and the second housing 120 enclose a second cavity 121, and the magnetorheological fluid 300 is disposed in the first cavity 111 and the second cavity 121.
A first exciting coil separator 150 and a second exciting coil separator 160 are coaxially arranged in the first cavity 111 and the second cavity 121, are annular, and are fixedly connected with the corresponding shell and the outer separator at two axial ends respectively to enclose a closed first annular cavity and a closed second annular cavity. A first exciting coil 151 and a second exciting coil 161 are coaxially arranged in the first annular cavity and the second annular cavity, and operate independently. The partition board is used for avoiding the mutual interference of the magnetic fields of the exciting coils in the two cavities.
Within the first cavity 111, a first output disc 170, which is disc-shaped, is provided adjacent to the first housing 110. A first magnetic input disc 171 is fitted over the hollow shaft of the first outer partition 130 in the first chamber 111. Inside the second cavity 121, a second output disc 180, which is disc-shaped, is provided adjacent to the second housing 120. A second output tray disposed within the second cavity proximate the second housing; a second magnetic input disc 181 is sleeved on the hollow shaft of the second outer partition 140 in the second cavity 121 in a matching way. The plurality of connecting rods 190 are uniformly arranged along the circumferential direction of the first outer partition 130, and respectively pass through the first outer partition 130 and the second outer partition 140 in a rotatable manner, and the two axial ends are respectively and fixedly connected with the first magnetic input disc 171 and the second magnetic input disc 181 in the circumferential direction. The first magnetic input disc 171 and the second magnetic input disc 181 are cooperatively connected with the hollow shafts of the corresponding first outer partition 130 and the hollow shafts of the second outer partition 140, so that the first magnetic input disc 171 and the second magnetic input disc 181 rotate synchronously with the first outer partition 130 and the second outer partition 140 and the housing and are respectively capable of moving along the axial direction of the hollow shafts of the first outer partition 130 and the hollow shafts of the second outer partition 140;
a first output disc shaft 172 fixedly connected to the center of the first output disc 170 and coaxially rotatably passing through the first magnetic input disc 171, the hollow shaft 131 of the first outer partition 130, the hollow shaft 141 of the second outer partition 140, the second magnetic input disc 181 and the second output disc 180 through bearings 174 and passing out of the second housing 120; a sealing ring is sleeved at the hollow shaft of the first output disc shaft 172 penetrating into the first outer partition plate 130, and a sealing ring 173 is sleeved at the hollow shaft penetrating out of the second outer partition plate 140, so that magnetorheological fluid is prevented from entering the hollow shaft. The center of the second output disc 180 is fixedly connected with a second output disc shaft 182, the second output disc shaft is coaxially sleeved on the first output disc shaft 172, and the second output disc shaft 182 penetrates out of the second shell 120 through a bearing 184, so that the relative rotation of the first output disc shaft 172 and the second output disc shaft 182 can be realized, and a sealing ring 183 is sleeved at the position where the second output disc shaft 182 penetrates into the second shell 120, so that leakage of magnetorheological fluid is avoided. Corresponding mating patterns, preferably a circular truncated cone shaped protrusion and groove configuration, are provided on opposite sides of the first output disk 170 and the first magnetic input disk 171, the second output disk 180 and the second magnetic input disk 181, respectively. Such that the first magnetic input disk 171 or the second magnetic input disk 181 is adjacent to the first output disk 170 or the second output disk 180 and can be engaged to effect synchronous rotation, outputting power.
A first coolant separator 210 and a second coolant separator 220 are disposed between the first outer separator 130 and the second outer separator 140 in a mutually adhering manner, and the first coolant separator 210 and the second coolant separator 220 enclose a first annular coolant chamber 211 and a second annular coolant chamber 212 which are concentric and mutually communicated, and enclose a plurality of cylindrical accommodating chambers 230 between the first annular coolant chamber 211 and the second annular coolant chamber 212 for accommodating the connecting rod 190. A coolant outlet and a coolant inlet are provided on the first housing 110 and the second housing 120, respectively, and communicate with the first annular coolant chamber 211, respectively.
A balance weight 240 is fixedly sleeved on the connecting rod 190 positioned in the cylindrical accommodating cavity 230 and integrally formed, and is cylindrical. The plurality of return springs 241 are arranged in the cylindrical accommodating cavity 230 and are respectively and symmetrically sleeved on the connecting rods 190 positioned at two sides of the balance weight 240, one end of each return spring 241 is contacted with the balance weight 240, and the other end is contacted with the inner wall of the cylindrical accommodating cavity 230; when the return spring 241 is not elastically deformed, the balance weight 240 is centered in the cylindrical receiving chamber 230.
When one clutch works, the exciting coil generates attraction force to enable the input disc assembly to approach to the clutch output disc on the same side, so that working gaps between the two clutch output discs are reduced, and meanwhile, the input disc and the output disc form an irregular cavity, so that transmission torque can be increased. The return spring can prevent the input disc assembly from being directly contacted with the cooling liquid partition plate in a hard collision mode when the input disc assembly is attracted to move by magnetic force on the one hand, and can realize automatic reset of the input disc assembly when the double clutches are disconnected on the other hand.
A plurality of first through grooves 250, which are cylindrical, are uniformly arranged along the circumferential direction of the first coolant partition 210, are positioned corresponding to the first annular coolant cavity 211, and penetrate the first coolant partition 210, the second coolant partition 220, the first outer partition 130, and the second outer partition 140; a plurality of second through grooves 260 having a cylindrical shape, being uniformly arranged along the circumferential direction of the first coolant separator 210, and positioned to correspond to the second annular coolant 212 chamber, and penetrating the first coolant separator 210, the second coolant separator 220, the first outer separator 130, and the second outer separator 140; the first through groove 250 and the second through groove 260 are respectively and axially provided with a first shape memory alloy 251 and a second shape memory alloy 261, the two axial ends of the first shape memory alloy 251 and the two axial ends of the second shape memory alloy 261 are respectively and fixedly provided with a first heat dissipation ring 252 and a second heat dissipation ring 262, the first shape memory alloy 251 between the first heat dissipation rings 252 is respectively sleeved with two first return springs 253, and the second shape memory alloy 261 between the second heat dissipation rings 262 is respectively sleeved with two second return springs 263. One end of the heat dissipation ring is fixedly connected with the corresponding heat dissipation ring, and the other end of the heat dissipation ring is fixedly connected with the inner wall of the through groove.
In the initial state, the first heat dissipation ring 252 is completely located in the first through groove 250, and the second heat dissipation ring 262 is completely located in the second through groove 260; when the first shape memory alloy 251 and the second shape memory alloy 261 are heated, one side of the first shape memory alloy 251 and one side of the second shape memory alloy 261, which are close to the first annular cooling liquid cavity 211 and the second annular cooling liquid cavity 212, are elongated, so that one end of the corresponding first heat dissipation ring 252 and one end of the corresponding second heat dissipation ring 262 enter the first annular cooling liquid cavity 211 and the second annular cooling liquid cavity 212, the other end of the corresponding first heat dissipation ring 252 and the corresponding second heat dissipation ring 262 are still positioned in the corresponding first through groove 250 and the corresponding second through groove 260, cooling liquid is prevented from entering the through groove, and when the magnetorheological fluid is heated, heat energy in the magnetorheological fluid cavity can be converted into mechanical energy of the heat dissipation ring, and on the other hand, the contact area of the heat dissipation ring and the cooling liquid is increased, and the heat dissipation speed is accelerated; when the first shape memory alloy 251 and the second shape memory alloy 261 are cooled, one side of the first shape memory alloy 251 and the second shape memory alloy 261, which is close to the first cavity 111 and the second cavity 121, are elongated, so that one end of the corresponding first heat dissipation ring 252 and one end of the corresponding second heat dissipation ring 262 enter the first cavity 111 and the second cavity 121, and the other end of the corresponding first heat dissipation ring is still positioned in the corresponding first through groove 250 and the corresponding second through groove 260, and when the cooling is performed, magnetorheological fluid can be prevented from entering the through grooves, heat energy transfer is accelerated, and meanwhile, the extrusion of the magnetorheological fluid is realized.
Sealing rings 191 are coaxially and fixedly arranged on the first outer partition 130 and the second outer partition 140 which are close to two sides of the cylindrical accommodating cavity 230 and are used for the connecting rod 190 to pass through in a sealing manner, so that magnetorheological fluid is prevented from entering the cylindrical accommodating cavity 230. Sealing rings 254 are fixedly arranged at the contact positions of the first outer partition plate 130 and the first cooling liquid partition plate 210 and the contact positions of the second outer partition plate 140 and the second cooling liquid partition plate 220, which correspond to the first through groove 250 and the second through groove 260, and are used for sealing and penetrating the first shape memory alloy 251 and the second shape memory alloy 262, so that magnetorheological fluid and cooling liquid are prevented from entering the through grooves to be mixed.
Working principle:
when the double clutches are disconnected, the exciting coils are not electrified, and the magnetorheological fluid at both sides shows Newtonian fluid characteristics; stopping pumping the cooling liquid; the input shaft assembly is kept at an initial middle position under the action of the spring, the heat dissipation device cannot mechanically move, and the heat dissipation circular ring is kept at the initial position under the action of the spring.
When the first clutch is required to work independently, the exciting coil is electrified, a magnetic field is generated in the cavity, magnetic particles in the magnetorheological fluid quickly form a chain structure, and shearing stress is transmitted through the magnetorheological fluid in the irregular cavity of the first magnetic input disc and the first output disc to transmit the torque of the engine. With the increase of the current, the larger the torque liquid which can be transmitted by the magnetorheological fluid is; at the same time, the larger the attraction force of the coil to the magnetic input disc assembly, the closer the input disc assembly is to the output disc, and the further the torque capable of being transmitted is increased. The clutch gradually enters a sliding friction state from a separation state, and finally, torque transmission is realized when the shearing stress of magnetorheological fluid among the clutches is larger than the transmitted engine torque. The shearing stress of the magnetorheological fluid can be controlled by controlling the current in the exciting coil, so that the clutch combination degree of the corresponding odd gears is controlled. During clutch operation, coolant begins to pump in, flowing through the entire coolant passage. Because the clutch can rotate along with the input shaft, the cooling liquid can flow more fully, and the heat dissipation effect is better. On the other hand, the heat dissipating device starts to work, the shape memory alloy part axially stretches to push the heat dissipating block on one side to enter the cooling liquid channel, so that on the one hand, the heat energy in the magnetorheological fluid cavity is converted into mechanical energy of the heat dissipating ring and the spring to dissipate, and on the other hand, the contact area of the heat dissipating ring and the cooling liquid is enlarged, and the heat dissipating speed is accelerated. When the magnetorheological fluid is cooled, the shape memory alloy part axially stretches reversely to push the heat dissipation ring on the other side to enter the magnetorheological fluid cavity, so that the heat energy transmission is accelerated, and meanwhile, the magnetorheological fluid is extruded. When the second clutch works alone, the working principle is the same as that of the first clutch, except that the second clutch generally controls even gears.
When a gear shift is required, gears of the gear in the transmission are engaged in advance. After the engagement is completed, the current of the exciting coil in the clutch in the front gear is reduced immediately, and the current of the magnetic coil in the clutch in the current gear is increased immediately, so that uninterrupted power gear shifting is realized. After the clutch of the front gear is completely combined, the current in the electromagnetic coil in the clutch of the front gear is reduced to zero, and the work is stopped.
The disk type magnetorheological double clutch provided by the invention realizes accurate and effective control of clutch operation by utilizing the characteristic that the magnetorheological fluid can react in millisecond time; the engagement smoothness of the transmission and the uninterrupted power shift are realized by controlling the relative current in the exciting coils at two sides. A cooling liquid channel positioned in the center of the clutch is used for circulating cooling liquid, so that the clutch is cooled; meanwhile, the heat-dissipating device formed by the shape memory alloy of the temperature sensing material and the heat-dissipating ring is utilized to convert heat energy into mechanical energy for driving the heat-dissipating ring to axially move, and the heat-receiving area of the heat-dissipating ring after the heat-dissipating ring moves is larger, so that the accelerated heat dissipation of the clutch can be realized, and the problem of magnetorheological fluid failure under the condition of overhigh temperature is effectively solved.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A disk-type magnetorheological dual clutch, comprising:
the first shell and the second shell are fixedly connected in a circumferential fit manner and enclose a closed hollow cylindrical structure;
the first outer partition plate and the second outer partition plate are arranged between the first shell and the second shell at intervals, and are fixedly connected with the first shell and the second shell in the circumferential direction;
the first outer partition plate and the first shell enclose a first cavity, the second outer partition plate and the second shell enclose a second cavity, and magnetorheological fluid is arranged in the first cavity and the second cavity;
the first excitation coil baffle and the second excitation coil baffle are annular, are coaxially arranged in the first cavity and the second cavity respectively, and enclose a closed first annular cavity and a closed second annular cavity respectively;
the first exciting coil and the second exciting coil are coaxially arranged in the first circular cavity and the second circular cavity respectively;
a first output tray disposed within the first cavity proximate the first housing;
the first magnetic input disc is sleeved on the hollow shaft of the first outer partition plate in the first cavity in a matched manner;
a second output tray disposed within the second cavity proximate the second housing;
the second magnetic input disc is sleeved on the hollow shaft of the second outer partition board in the second cavity in a matched manner;
the connecting rods respectively pass through the first outer baffle plate and the second outer baffle plate in a rotatable manner, and the two axial ends of the connecting rods are respectively and fixedly connected with the first magnetic input disc and the second magnetic input disc in the circumferential direction;
the first magnetic input disc and the second magnetic input disc rotate synchronously with the first outer partition plate and the second outer partition plate and can move along the axial direction of the hollow shaft of the first outer partition plate and the hollow shaft of the second outer partition plate respectively;
one end of the first output disc shaft is fixedly connected with the center of the first output disc, and the other end of the first output disc shaft coaxially and rotatably penetrates through the first magnetic input disc, the hollow shaft of the first outer partition plate, the hollow shaft of the second outer partition plate, the second magnetic input disc and the second output disc and penetrates out of the second shell;
one end of the second output disc shaft is fixedly connected with the center of the second output disc, and the other end of the second output disc shaft is coaxially sleeved on the first output disc shaft in a hollow manner and penetrates out of the second shell;
the first output disc, the first magnetic input disc, the second output disc and the second magnetic input disc can respectively and synchronously rotate in a matched mode, and the connecting rods are evenly arranged along the circumference of the first outer partition plate.
2. The disk magnetorheological dual clutch of claim 1, further comprising:
the first cooling liquid partition plate and the second cooling liquid partition plate are attached to each other and arranged between the first outer partition plate and the second outer partition plate, and form a first annular cooling liquid cavity and a second annular cooling liquid cavity which are concentric and communicated with each other, and a plurality of cylindrical accommodating cavities are formed between the first annular cooling liquid cavity and the second annular cooling liquid cavity in an enclosing mode and used for accommodating the connecting rods.
3. The disk magnetorheological dual clutch of claim 2, wherein the connecting rod further comprises:
the balance weight is cylindrical, is fixedly sleeved on the connecting rod positioned in the cylindrical accommodating cavity and is integrally formed with the connecting rod;
the plurality of return springs are arranged in the cylindrical accommodating cavity, are respectively and symmetrically sleeved on the connecting rods positioned at two sides of the balance weight, and are in contact with the balance weight at one end and the inner wall of the cylindrical accommodating cavity at the other end;
when the return spring is not elastically deformed, the balance weight is positioned at the center of the cylindrical accommodating cavity.
4. A disk magnetorheological dual clutch according to claim 2 or 3, further comprising:
the first through grooves are cylindrical, are uniformly arranged along the circumferential direction of the first cooling liquid partition plate, correspond to the first annular cooling liquid cavity in position and penetrate through the first cooling liquid partition plate, the second cooling liquid partition plate, the first outer partition plate and the second outer partition plate;
the plurality of second through grooves are cylindrical, are uniformly arranged along the circumferential direction of the first cooling liquid partition plate, correspond to the second annular cooling liquid cavity in position and penetrate through the first cooling liquid partition plate, the second cooling liquid partition plate, the first outer partition plate and the second outer partition plate;
the plurality of first shape memory alloys are cylindrical and are axially arranged in the first through grooves respectively;
a plurality of second shape memory alloys which are cylindrical and are respectively axially arranged in the second through grooves;
the plurality of first heat dissipation rings are respectively and fixedly sleeved at the two axial ends of the first shape memory alloy;
the second heat dissipation rings are respectively and fixedly sleeved at the two axial ends of the second shape memory alloy;
the plurality of first return springs are respectively sleeved on the first shape memory alloy between the first heat dissipation circular rings;
the plurality of second return springs are respectively sleeved on the second shape memory alloy between the second heat dissipation circular rings;
wherein, each first shape memory alloy is sleeved with two first reset springs, one end of each first reset spring is fixedly connected with the corresponding first heat dissipation ring, and the other end of each first reset spring is fixedly connected with the inner wall of the first through groove; two second reset springs are sleeved on each second shape memory alloy, one end of each second reset spring is fixedly connected with the corresponding second heat dissipation ring, and the other end of each second reset spring is fixedly connected with the inner wall of the second through groove; and
in the initial state, the first heat dissipation ring is completely positioned in the first through groove, and the second heat dissipation ring is completely positioned in the second through groove;
when the first shape memory alloy and the second shape memory alloy are heated, one sides of the first shape memory alloy and the second shape memory alloy, which are close to the first annular cooling liquid cavity and the second annular cooling liquid cavity, are elongated, so that one ends of the corresponding first heat dissipation circular ring and the corresponding second heat dissipation circular ring enter the first annular cooling liquid cavity and the second annular cooling liquid cavity, and the other ends of the corresponding first heat dissipation circular ring and the corresponding second heat dissipation circular ring are still positioned in the corresponding first through groove and the corresponding second through groove;
when the first shape memory alloy and the second shape memory alloy are cooled, one sides of the first shape memory alloy and the second shape memory alloy, which are close to the first cavity and the second cavity, are elongated, so that one ends of the corresponding first heat dissipation circular rings and the corresponding second heat dissipation circular rings enter the first cavity and the second cavity, and the other ends of the corresponding first heat dissipation circular rings and the corresponding second heat dissipation circular rings are still positioned in the corresponding first through grooves and the corresponding second through grooves.
5. The disc magnetorheological dual clutch of claim 4, further comprising:
and the cooling liquid outlet and the cooling liquid inlet are respectively arranged on the first shell and the second shell and are respectively communicated with the first annular cooling liquid cavity.
6. A disk type magnetorheological double clutch according to claim 1, 2 or 3, wherein a sealing ring is sleeved at a hollow shaft of the first outer baffle penetrating into the first output disk shaft, and a sealing ring is sleeved at a hollow shaft of the second outer baffle penetrating out of the first output disk shaft; and a sealing ring is sleeved at the position where the second output disc shaft penetrates into the second shell.
7. The disc magnetorheological dual clutch of claim 4, wherein sealing rings are fixedly disposed on the first and second outer diaphragms adjacent both sides of the cylindrical receiving cavity coaxially for sealing the passage of the connecting rod.
8. The disk magnetorheological dual clutch of claim 4, wherein sealing rings are fixedly disposed at the contact points of the first outer partition plate and the first cooling liquid partition plate and the contact points of the second outer partition plate and the second cooling liquid partition plate corresponding to the first through groove and the second through groove for the first shape memory alloy and the second shape memory alloy to pass through in a sealing manner.
9. The disk magnetorheological dual clutch of claim 1, 2, 3, 7 or 8, wherein the first output disk shaft is rotatable through the first magnetic input disk, the hollow shaft of the first outer partition and the hollow shaft of the second outer partition by bearings; the second output disc shaft is rotatable through the second housing by a bearing.
10. The disc magnetorheological dual clutch of claim 9, wherein the first output disc and the first magnetic input disc, the second output disc and the second magnetic input disc are each provided with correspondingly matched frustoconical protrusion and groove structures on opposite sides thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911211549.4A CN110864055B (en) | 2019-12-02 | 2019-12-02 | Disk type magneto-rheological double clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911211549.4A CN110864055B (en) | 2019-12-02 | 2019-12-02 | Disk type magneto-rheological double clutch |
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| Publication Number | Publication Date |
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| CN110864055A CN110864055A (en) | 2020-03-06 |
| CN110864055B true CN110864055B (en) | 2024-02-09 |
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| CN201911211549.4A Active CN110864055B (en) | 2019-12-02 | 2019-12-02 | Disk type magneto-rheological double clutch |
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| CN113309799B (en) * | 2021-06-16 | 2022-07-12 | 重庆理工大学 | Thermotropic circulating cooling multi-arc magnetorheological brake |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732799A1 (en) * | 1986-09-30 | 1988-04-07 | Mitsubishi Electric Corp | ELECTROMAGNETIC CLUTCH DEVICE |
| DE4120243A1 (en) * | 1990-06-20 | 1992-01-09 | Mitsubishi Electric Corp | MAGNETIC POWDER COUPLING |
| CN102080692A (en) * | 2011-02-21 | 2011-06-01 | 中国矿业大学 | Double-disk type magnetorheological clutch |
| CN206129930U (en) * | 2016-10-28 | 2017-04-26 | 重庆理工大学 | Magnetorheological suspensions fan clutch from electricity generation shape memory alloy on -off control |
| CN206647449U (en) * | 2017-04-17 | 2017-11-17 | 重庆理工大学 | A kind of clutch with magnetic rheologic liquid of marmem ring compensation |
| CN211039462U (en) * | 2019-12-02 | 2020-07-17 | 吉林大学 | Liquid cooling magneto-rheological double clutch with adjustable interval |
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2019
- 2019-12-02 CN CN201911211549.4A patent/CN110864055B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732799A1 (en) * | 1986-09-30 | 1988-04-07 | Mitsubishi Electric Corp | ELECTROMAGNETIC CLUTCH DEVICE |
| DE4120243A1 (en) * | 1990-06-20 | 1992-01-09 | Mitsubishi Electric Corp | MAGNETIC POWDER COUPLING |
| CN102080692A (en) * | 2011-02-21 | 2011-06-01 | 中国矿业大学 | Double-disk type magnetorheological clutch |
| CN206129930U (en) * | 2016-10-28 | 2017-04-26 | 重庆理工大学 | Magnetorheological suspensions fan clutch from electricity generation shape memory alloy on -off control |
| CN206647449U (en) * | 2017-04-17 | 2017-11-17 | 重庆理工大学 | A kind of clutch with magnetic rheologic liquid of marmem ring compensation |
| CN211039462U (en) * | 2019-12-02 | 2020-07-17 | 吉林大学 | Liquid cooling magneto-rheological double clutch with adjustable interval |
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| CN110864055A (en) | 2020-03-06 |
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