阅读说明：本技术 基于挤压-剪切模式的水冷式磁流变离合器及控制方法 (Water-cooled magnetorheological clutch based on extrusion-shearing mode and control method ) 是由 王书友 陈飞 田祖织 张高祥 于 2020-06-01 设计创作，主要内容包括：一种基于挤压-剪切模式的水冷式磁流变离合器及控制方法,适用于工矿企业中使用。包括左导磁外壳和右导磁外壳,左导磁外壳和右导磁外壳扣合后内部设有空腔,空腔内设有励磁线圈,励磁线圈内侧设有离合器主体,离合器主体包括主动组件、从动组件和液压驱动组件,其中主动组件包括左传动盘,左传动盘内设有包括多个周向延伸的圆环状冷却水流道和多个径向冷却水流道,液压驱动组件通过压盘推动左传动盘相邻的中间传动盘向左运动从而传递更大的转矩。其在左传动盘内的冷却水道既能有效散热又保持高磁导率,利用液压驱动组件提高了转矩传控能力,从而获得数倍的功率/体积比或功率/质量比。(A water-cooled magnetorheological clutch based on an extrusion-shearing mode and a control method are suitable for industrial and mining enterprises. Including left side magnetic conduction shell and right side magnetic conduction shell, inside cavity that is equipped with behind left side magnetic conduction shell and the right side magnetic conduction shell lock, be equipped with excitation coil in the cavity, the excitation coil inboard is equipped with the clutch main part, the clutch main part includes the initiative subassembly, driven subassembly and hydraulic drive subassembly, wherein the initiative subassembly includes left driving disk, be equipped with the ring form cooling water runner and a plurality of radial cooling water runner including a plurality of circumference extensions in the left driving disk, thereby hydraulic drive subassembly passes through the pressure disk and promotes the adjacent middle driving disk of left driving disk and moves the transmission torque that is bigger left. The cooling water channel in the left transmission disc can effectively dissipate heat and keep high magnetic conductivity, and the torque transmission and control capacity is improved by utilizing the hydraulic driving assembly, so that the power/volume ratio or the power/mass ratio of a plurality of times is obtained.)

1. The utility model provides a water-cooled magnetic current becomes clutch based on extrusion-shear mode, it includes left side magnetic conduction shell (7) and right side magnetic conduction shell (12) through bolted connection, left side magnetic conduction shell (7) and right side magnetic conduction shell (12) both sides axial opening, left side magnetic conduction shell (7) and right side magnetic conduction shell (12) lock back inside are equipped with the cavity, be equipped with excitation coil (8) in the cavity, excitation coil (8) inboard is equipped with the clutch main part, the clutch main part includes the initiative subassembly, driven subassembly and hydraulic drive subassembly, its characterized in that:

the driving assembly comprises a driving shaft (1), a left end cover (3), a locking nut a (4), a tapered roller bearing a (5), a left bearing seat (6), a left transmission disc (32), a magnetism isolating sleeve (9) and a right transmission disc (11); the left bearing seat (6) is fixed in an axial hole of a left magnetic conduction shell (7) through a bolt, the driving shaft (1) penetrates through the left bearing seat (6) and is fixedly connected with a left transmission disc (32) through a bolt, a plurality of cooling water flow channels for heat dissipation are arranged in the left transmission disc (32), a pair of tapered roller bearings a (5) are arranged between the driving shaft (1) and the left bearing seat (6), a left end cover (3) for fixing the driving shaft (1) is arranged on the left bearing seat (6), a plurality of sealing rings (2) are arranged between the left end cover (3) and a bracket for fixing the driving shaft (1), a locking nut a (4) is arranged between the left end cover (3) and the left bearing seat (6), the tapered roller bearings a (5) are axially positioned by utilizing the locking nut a (4), a plurality of cooling water channels are arranged inside the driving shaft (1), a water inlet and a water outlet which are connected with the cooling water channel and the external are formed, a magnetic isolation sleeve (9) is fixedly arranged between the outer circumferences of the left transmission disc (32) and the right transmission disc (11) through bolts, a magnetorheological fluid working space (30) is reserved between the left transmission disc (32) and the magnetic isolation sleeve (9) as well as between the left transmission disc (11) and the right transmission disc (9), and O-shaped sealing rings a (10) are respectively arranged between the magnetic isolation sleeve (9) and the left transmission disc (32) as well as between the magnetic isolation sleeve (11) and the right transmission disc (11) for static sealing;

the driven assembly comprises a ball spline, a pressure plate (14), a right bearing seat (18), a right end cover (20), a locking nut b (21), an intermediate transmission plate (31) and a tapered roller bearing b (23), wherein the ball spline comprises a ball spline shaft (22.a) and a ball spline sleeve (22.b), the pressure plate (14) is arranged outside the ball spline sleeve (22.b), the right bearing seat (18) is arranged outside the ball spline shaft (22.a), the intermediate transmission plate (31) is arranged in a magnetorheological fluid working space (30) of the driving assembly, the right center of the intermediate transmission plate (31) is connected with the pressure plate (14) through a bolt, the pressure plate (14) penetrates through the right transmission plate (11), the pressure plate (14) and the ball spline sleeve (22.b) are connected through a flat key to transmit torque, and the pressure plate (14) can axially move relative to the ball spline shaft while transmitting the torque to the ball spline shaft through the ball spline, therefore, the pressure plate (14) can transmit torque to the ball spline shaft (22.a) while driving the middle transmission plate (31) to move axially under the action of the hydraulic driving assembly, the ball spline shaft (22.a) is radially supported on the right bearing seat (18) through a pair of tapered roller bearings b (23), the bearings are axially positioned through the locking nuts b (21), and the right end cover (20) is fixedly connected with the right bearing seat (18) through screws;

the hydraulic driving assembly comprises a fastening sleeve (13), a tapered roller bearing c (27), an oil cylinder and a Gelai sealing ring (25); the oil cylinder comprises an oil cylinder cover (26), an oil cylinder barrel (17) and an oil cylinder piston (16), wherein a fastening sleeve (13) is arranged in an opening at the right side of a right magnetic conduction shell (12) and outside a pressure plate (14), a pair of tapered roller bearings c (27) are arranged between the fastening sleeve (13) and the pressure plate (14) and used for preventing the oil cylinder piston (16) from rotating along with the pressure plate (14), the oil cylinder piston (16) is a hollow piston, a right bearing seat (18) is arranged in the oil cylinder piston (16), the oil cylinder piston (16) is arranged in the oil cylinder barrel (17), the axial opening of the right magnetic conduction shell (12) is connected with the oil cylinder barrel (17) through an oil cylinder cover (26) bolt, an O-shaped sealing ring b (15) is arranged in a support of the oil cylinder cover (26) and the oil cylinder piston (16), the oil cylinder piston (16) forms contact type sealing with the oil cylinder barrel (17) through a Ge, a pair of tapered roller bearings c (27) and a pressure plate (14) and an oil cylinder piston (16) are axially fastened through a fastening sleeve (13), the oil cylinder piston (16) is arranged on the outer side of a right bearing seat (18) and on the inner side of an oil cylinder barrel (17), the oil cylinder piston (16) and the fastening sleeve (13) are connected in a buckling mode, two oil ports are formed in the oil cylinder barrel (17) respectively, the oil cylinder piston (16) can be controlled to axially reciprocate in an oil cylinder through oil, an intermediate transmission disc (31) is driven to axially move leftwards or rightwards in a magnetorheological fluid working space (30) through the pressure plate (14), and magnetorheological fluid wrapping the intermediate transmission disc (31) is arranged in the magnetorheological fluid working space (30).

2. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 1, wherein: the center of a circle of the middle transmission disc (31) is provided with a bolt hole fixedly connected with the pressure plate (14), fan-shaped openings which are uniformly distributed around the circle are formed in the outer side of the round hole, redundant magnetorheological fluid flows into a working gap on the right side of the middle transmission disc (31) when the middle transmission disc (31) axially moves to extrude a magnetic column chain formed by the magnetorheological fluid, and the middle transmission disc can axially reciprocate under the driving of the pressure plate (14) while transmitting torque through rotary motion.

3. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 1, wherein: the trompil that holds pressure disk (14) and pass is opened to right side transmission dish (11) centre of a circle department, be equipped with circlip (28) and H type sealing washer (29) between the opening in pressure disk (14) and right side transmission dish (11), right side transmission dish (11) and middle transmission dish (31) are passed in pressure disk (14) and are connected, magnetorheological suspensions are difficult for revealing when H type sealing washer (29) are used for guaranteeing pressure disk (14) to drive middle transmission dish (31) and right side transmission dish (11) axial reciprocating motion and rotary motion, H type sealing washer (29) are the carbon fiber filler teflon material, better sealed effect has, utilize circlip to its axial positioning, prevent that its transmission leads to reducing sealed effect when pressure disk (14) right side transmission dish (11) axial displacement relatively.

4. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 3, wherein: and a piston stroke adjusting backing ring (19) is arranged between the oil cylinder piston (16) and the right end cover (20) in the oil cylinder barrel (17), and the stroke of the hydraulic driving assembly is adjusted by adjusting the piston stroke adjusting backing ring (19).

5. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 1, wherein: and a cooling water channel connected with the water outlet hole in the driving shaft (1) is positioned at the axial circle center, and the cooling water channel connected with the water inlet is arranged at the upper side and the lower side of the circle center.

6. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 5, wherein: the cooling water flow channels in the left transmission disc (32) comprise a plurality of circumferentially extending circular cooling water flow channels and a plurality of radial cooling water flow channels, wherein the circular cooling water flow channels are of a concave-convex zigzag structure, the radial cooling water flow channels comprise a cooling water outlet channel transversely connecting all circular cooling water flows and two cooling water inlet channels vertically arranged above and below the cooling water outlet channel, the cooling water outlet channel and the cooling water inlet channels are of a multi-section stepped structure, the number of the stage stages is the same as that of the circular cooling water flow channels, and the stage is wider when being closer to the circle center of the left transmission disc (32) and narrower when being closer to the circumference; inlets, which are intersected between the annular cooling water flow channel extending in the circumferential direction and the plurality of radial cooling water flow channels, have different orifice diameters; the cooling effect on the left transmission disc (32) can be ensured, most of the area of the left transmission disc (32) can be kept in a solid structure and high magnetic conductivity can be kept, a water hole connected with a water outlet hole of the driving shaft (1) is formed in the center of a cooling water outlet channel in the specific left transmission disc (31), two vertically arranged cooling water inlet channels are not directly communicated with the cooling water outlet channel, two water holes connected with a water inlet of the driving shaft (1) are respectively formed in the two cooling water inlet channels, and a plurality of annular cooling water channels which are mutually nested are arranged between the water inlet pipe and the water outlet pipe;

the cooling water flows into an upper cooling water inlet channel and a lower cooling water inlet channel in the left transmission disc (32) from a water inlet hole on the driving shaft (1), when the cooling water passes through the circular cooling water channel with the smallest inner diameter, a part of the cooling water enters the circular cooling water channel, passes through a left cooling water outlet channel and a right cooling water outlet channel, flows into the axial cooling water channel on the driving shaft (1) from a water hole in the center and flows out from a water outlet hole, the other part of the cooling water continues to pass through the upper and the lower cooling water inlet channels to the outer diameter direction under the action of rotating centrifugal force, the radial cooling water channel is step-shaped, the diameter of the channel is smaller towards the outer diameter direction, so that a liquid resistance effect is generated, the cooling water is prevented from completely flowing to the outermost circular cooling water channel under the action of the centrifugal force, the inside is difficult to cool, the circular cooling water channel is of a concave-convex structure, and, the laminar flow of the cooling water is converted into a complex flow state of turbulent flow and secondary vortex, the heat exchange efficiency between fluid-solid coupling surfaces is increased, and the defect that all or most of the cooling water flows to the outermost side cooling channel under the action of the rotary centrifugal force during working is overcome.

7. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 3, wherein: and a displacement sensor (24) for measuring the displacement of the oil cylinder piston (17) is arranged between the inside of the right bearing seat (18) and the inner hole of the oil cylinder piston (17).

8. The water-cooled magnetorheological clutch based on the extrusion-shear mode of claim 1, wherein: two oil ports of the hydraulic driving device are connected with an electro-hydraulic control device through pipelines, and the electro-hydraulic control device comprises a motor (33), an oil pump (34), an oil suction filter (35), an oil return filter (36), a proportional overflow valve (37), an electromagnetic directional valve (38), a common speed regulating valve (39) and a proportional flow valve (40); wherein an oil pump (34) driven by a motor (33) is connected with an oil suction filter (35) arranged in the oil cylinder through a pipeline, the oil pump (34) is connected with an electromagnetic directional valve (38) through a pipeline, a proportional overflow valve (37) is arranged on the pipeline, the pipeline of the electromagnetic directional valve (38) is connected with an oil return filter (36) arranged in the oil cylinder, the electromagnetic directional valve (38) is also respectively connected with two oil ports of a hydraulic driving device through two pipelines, a common speed regulating valve (39) is arranged in two pipeline supports, and one pipeline is provided with a proportional flow valve (40); make pressure control or displacement control's switching through solenoid directional valve (38), control hydro-cylinder (16) among the hydraulic drive device are fixed hydro-cylinder, hydro-cylinder piston (16) with be equipped with two tapered roller bearing (26) between pressure disk (14) and through fastening sleeve (13) hydro-cylinder piston (16), tapered roller bearing c (27) and pressure disk (14) at axial fixity connection to guarantee that hydro-cylinder piston (16) can come and go under the effect of oil pressure and do axial displacement in drive pressure disk (14) of no return stroke error, avoid the rotatory drive hydro-cylinder piston (16) motion of pressure disk (14) through the design of tapered roller bearing c (27) simultaneously.

9. A control method for the water-cooled magnetorheological clutch based on the extrusion-shear mode according to claim 1, characterized by comprising the following steps:

when the clutch works, the magnet exciting coil (8) is utilized to control the viscosity of magnetorheological fluid in the magnetorheological fluid working space (30) so as to change the transmission capacity of the clutch; when the load torque is small, the size of the transmission torque and the rotating speed is controlled by adjusting the size of the input current in the exciting coil (8); when the required load torque exceeds the upper limit of current regulation, the hydraulic driving device is started to drive the oil cylinder piston (16) to provide axial extrusion stress, the displacement of the oil cylinder piston (16) drives the middle driving disc (31) to move towards the left driving disc (32) in the magnetorheological fluid working gap (30) through the transmission of the pressing disc (14), so that the magnetorheological fluid magnetic chain structure in the magnetorheological fluid working gap (30) between the left driving disc (32) and the middle driving disc (31) is compressed, the magnetorheological fluid forms a more compact columnar structure under the action of the extrusion stress to bring stronger shear-resistant yield strength, the driving assembly can transmit larger torque to the driven assembly, and the driven assembly finally transmits the torque to the ball spline shaft (22.a) through the pressing disc (14).

10. The control method according to claim 9, characterized in that: the space on the left side of an oil cylinder piston (16) in the oil cylinder is defined as an oil cylinder left cavity, and the space on the right side is defined as an oil cylinder right cavity;

when the hydraulic driving device is started, under the driving of a motor (33), pressure oil supplied from an oil tank by an oil pump (34) is filtered by an oil absorption filter (35), clean pressure oil firstly flows into a left cavity of the oil cylinder from a right flow of an electromagnetic directional valve (38), redundant oil flow q1 flows into a right cavity of the oil cylinder through a common speed regulating valve (39) at a flow q2 respectively, and returns to the oil tank through a proportional flow valve (40) at a flow q 3; at this time, q2 is q1-q 3; when q1 is greater than q3, q2 is greater than 0, and the oil cylinder piston (16) moves in; when q1 is less than q3, q2 is less than 0, and the oil cylinder piston (16) moves back; the advance and retreat of the oil cylinder piston (16) can be realized under the condition of no need of reversing by the electromagnetic reversing valve (38) by adjusting the opening degree of the proportional flow valve (40), and the displacement control of the oil cylinder piston (16) can be realized by matching with the displacement sensor (24); in addition, the proportional overflow valve (37) is prevented from working under a small valve opening all the time, so that the micro-feeding control of the oil cylinder piston (16) is realized; when extrusion stress is controlled, the electromagnetic directional valve (38) enters a right position to work, pressure oil freely flows into a right cavity of the oil cylinder through the right position of the electromagnetic directional valve (38) through the common speed regulating valve (39), the left cavity directly returns to the oil tank, and the pressure of the proportional overflow valve (37) is regulated and controlled, namely the feeding pressure of the oil cylinder can be controlled.

Technical Field

The invention relates to a magnetorheological clutch and a control method, in particular to a water-cooled magnetorheological clutch based on an extrusion-shearing mode and a control method, which are suitable for industrial and mining enterprises.

Background

The magnetorheological fluid is a novel intelligent material, can generate unique rheological property under the action of an external magnetic field, changes from low-viscosity Newtonian-like fluid into high-viscosity solid state, shows certain shear-resistant yield stress, and has transient property, reversibility and strong controllability. At present, the magnetorheological fluid is widely applied to the fields of aerospace, machining, precision engineering, construction, medical treatment and the like due to the advantages of quick response, low energy consumption, easiness in control, good durability, wide working temperature range, long service life and the like. In recent years, magnetorheological clutches based on magnetorheological fluid intelligent materials have the characteristics of high response speed, low noise, small volume, small abrasion of transmission parts, stepless speed regulation, flexible transmission, low control energy consumption, easy realization of remote control and automatic control of the speed regulation process and the like, and are widely applied to various occasions requiring speed and torque regulation, such as stepless speed regulation of fans, water pumps, ball mills and the like, soft start of belt conveyors, scraper conveyors and the like, and constant speed output of wind turbines, vehicle-mounted power generation systems and the like.

However, the development of the magnetorheological fluid clutch is always limited by the problem of insufficient shear yield strength of the magnetorheological fluid, and the magnetorheological clutch designed under the existing shear working mode cannot meet the industrial requirements because the transmission torque of the magnetorheological clutch is small. In order to increase the torque transmission capacity of the magnetorheological fluid clutch, the working mode of the magnetorheological fluid clutch is widened by adopting a mode of extruding magnetorheological fluid in the prior patent, for example, the working mode of the magnetorheological fluid clutch is stretched by utilizing a heat-sensitive material in the United states patent US5848678, the working mode of the magnetorheological fluid clutch is deformed by utilizing a memory alloy in the Chinese patent CN205859077U, the working mode of the magnetorheological fluid clutch is extruded by utilizing threads in the CN103089863A, the working mode of the magnetorheological fluid clutch is extruded by utilizing electromagnetic drive in CN102562857A, CN106949211A and CN203257931U, and the working mode of the magnetorheological fluid clutch is extruded by utilizing piezoelectric drive in CN 103470654A. However, these driving and pressing methods have disadvantages such as poor controllability and low driving power density.

Disclosure of Invention

Aiming at the defects of the technology, the water-cooled magnetorheological clutch based on the extrusion-shear mode and the control method thereof are provided, wherein the water-cooled magnetorheological clutch has high driving power, high control precision, good control stability and very high torque/mass ratio or torque/volume ratio.

In order to achieve the technical purpose, the water-cooled magnetorheological clutch based on the extrusion-shear mode comprises a left magnetic conduction shell and a right magnetic conduction shell which are connected through a bolt, wherein the two sides of the left magnetic conduction shell and the right magnetic conduction shell are axially opened, a cavity is formed in the left magnetic conduction shell and the right magnetic conduction shell after being buckled, an excitation coil is arranged in the cavity, a clutch main body is arranged on the inner side of the excitation coil, and the clutch main body comprises a driving assembly, a driven assembly and a hydraulic driving assembly, and is characterized in that:

the driving assembly comprises a driving shaft, a left end cover, a locking nut a, a tapered roller bearing a, a left bearing seat, a left transmission disc, a magnetism isolating sleeve and a right transmission disc; the left bearing seat is fixed in an axial hole of the left magnetic conduction shell by a bolt, the driving shaft passes through the left bearing seat and is fixedly connected with the left transmission disc by a screw, a plurality of cooling water flow passages for heat dissipation are arranged in the left transmission disc, a pair of tapered roller bearings a is arranged between the driving shaft and the left bearing seat, a left end cover for fixing the driving shaft is arranged on the left bearing seat, a plurality of sealing rings are arranged between the left end cover and a bracket for fixing the driving shaft (1), a locking nut a is arranged between the left end cover and the left bearing seat, the tapered roller bearings a are axially positioned by the locking nut a, a plurality of cooling water channels are arranged in the driving shaft, a water inlet and a water outlet which pass through the left end cover and connect the cooling water channels with the outside are arranged on the side wall of the driving shaft, a magnetic isolation sleeve is fixedly arranged between the outer circumferences of the left transmission disc, o-shaped sealing rings a are respectively arranged between the magnetism isolating sleeve and the left transmission disc and between the magnetism isolating sleeve and the right transmission disc;

the driven assembly comprises a ball spline, a pressure plate, a right bearing seat, a right end cover, a locking nut b, an intermediate transmission disc and a tapered roller bearing b, wherein the ball spline comprises a ball spline shaft and a ball spline sleeve, the pressure plate is arranged on the outer side of the ball spline sleeve, the right bearing seat is arranged on the outer side of the ball spline shaft, the intermediate transmission disc is arranged in a magnetorheological fluid working space of the driving assembly, the right center of the intermediate transmission disc is connected with the pressure plate through a bolt, the pressure plate penetrates through the right transmission disc, the pressure plate is internally connected with the ball spline sleeve through a flat key to transmit torque, the pressure plate can transmit the torque to the ball spline shaft while transmitting the torque to the ball spline shaft through the ball spline, so that the pressure plate can transmit the torque to the ball spline shaft while driving the intermediate transmission disc to axially move under the action of the hydraulic driving assembly, and the ball spline, meanwhile, the bearing is axially positioned by using a locking nut b, and a right end cover is fixedly connected with a right bearing seat through a screw;

the hydraulic driving assembly comprises a fastening sleeve, a tapered roller bearing c, an oil cylinder and a Gelai sealing ring; the oil cylinder comprises an oil cylinder cover, an oil cylinder barrel and an oil cylinder piston, wherein a fastening sleeve is arranged in an opening at the right side of the right magnetic conductive shell and outside the pressure plate, a pair of tapered roller bearings c is arranged between the fastening sleeve and the pressure plate and used for preventing the oil cylinder piston from rotating along with the pressure plate, the oil cylinder piston is a hollow piston, a right bearing seat is arranged in the oil cylinder piston, the oil cylinder piston is arranged in the oil cylinder barrel, the axial opening of the right magnetic conductive shell is connected with the oil cylinder barrel through an oil cylinder cover and an oil cylinder barrel bolt, an O-shaped sealing ring b is arranged in an oil cylinder cover and an oil cylinder piston bracket, the oil cylinder piston forms contact type sealing with the oil cylinder barrel through a Gelai sealing ring to prevent oil leakage in the oil cylinder, the pair of tapered roller bearings c, the pressure plate and the oil cylinder piston are, two oil ports are respectively arranged on the cylinder barrel of the oil cylinder, the oil cylinder piston can be controlled to axially reciprocate in the oil cylinder through oil liquid, so that the intermediate transmission disc is driven by the pressure disc to axially move leftwards or rightwards in the working space of the magnetorheological fluid, the magnetorheological fluid wrapping the intermediate transmission disc is arranged in the working space of the magnetorheological fluid,

the center of a circle of the middle transmission disc is provided with a bolt hole fixedly connected with the pressure plate, fan-shaped openings which are uniformly distributed around the circle are formed in the outer side of the round hole, redundant magnetorheological fluid flows into a working gap on the right side of the middle transmission disc when the middle transmission disc axially moves to extrude a magnetic column chain formed by the magnetorheological fluid, and the middle transmission disc can axially reciprocate under the driving of the pressure plate while transmitting torque through rotary motion.

An opening for accommodating the pressure plate to pass through is formed in the circle center of the right transmission disc, an elastic retainer ring and an H-shaped sealing ring are arranged between the pressure plate and the opening in the right transmission disc, and the pressure plate passes through the right transmission disc and is connected with the middle transmission disc; the elastic retainer ring and the H-shaped sealing ring are used for ensuring that the magnetorheological fluid is not easy to leak when the pressure plate drives the middle transmission plate and the right transmission plate to axially reciprocate and rotate; h type sealing washer is the carbon fiber filler teflon material, has better sealed effect, utilizes circlip to its axial positioning, prevents that it from leading to reducing sealed effect in the transmission when the relative right driving plate axial displacement of pressure disk.

And a piston stroke adjusting backing ring is arranged between the oil cylinder piston and the right end cover in the oil cylinder barrel, and the stroke of the hydraulic driving assembly is adjusted by adjusting the piston stroke adjusting backing ring.

And a cooling water channel connected with the water outlet hole in the driving shaft is positioned at the axial circle center, and cooling water channels connected with the water inlet are arranged at the upper side and the lower side of the circle center.

The cooling water flow channel in the left transmission disc comprises a plurality of circumferentially extending annular cooling water flow channels and a plurality of radial cooling water flow channels, wherein the annular cooling water flow channels are of a concave-convex zigzag structure, the radial cooling water flow channels comprise a cooling water outlet channel transversely connecting all annular cooling water flows and two cooling water inlet channels vertically arranged above and below the cooling water outlet channel, the cooling water outlet channel and the cooling water inlet channels are of a multi-section stepped structure, the number of the stage stages is the same as that of the annular cooling water flow channels, and the stage is wider when being closer to the center of a circle of the left transmission disc and narrower when being closer to the circumference; inlets, which are intersected between the annular cooling water flow channel extending in the circumferential direction and the plurality of radial cooling water flow channels, have different orifice diameters; the cooling effect on the left transmission disc can be guaranteed, most area of the left transmission disc can be kept in a solid structure, and high magnetic conductivity is kept;

the cooling water flows into the upper and lower cooling water inlet channels in the left transmission disc from the water inlet hole on the driving shaft, when the cooling water passes through the circular cooling water channel with the smallest inner diameter, a part of the cooling water enters the circular cooling water channel, passes through the left and right cooling water outlet channels, flows into the axial cooling water channel on the driving shaft from the central water hole and flows out from the water outlet hole, the other part of the cooling water continues to flow to the outer diameter direction through the upper and lower water inlet channels under the action of rotating centrifugal force, the radial cooling water channel is in a step shape, the diameter of the channel is smaller towards the outer diameter direction, so that a liquid resistance effect is generated, the situation that the cooling water flows all flow to the outermost circular cooling water channel under the action of centrifugal force are prevented, the inside is difficult to cool is caused, the circular cooling water channel structure is in a concave-convex zigzag structure, and the relationship between the Plan, the laminar flow of the cooling water is converted into a complex flow state of turbulent flow and secondary vortex, the heat exchange efficiency between fluid-solid coupling surfaces is increased, and the defect that all or most of the cooling water flows to the outermost side cooling channel under the action of the rotary centrifugal force during working is overcome.

And a displacement sensor for measuring the displacement of the oil cylinder piston is arranged between the right bearing seat and the inner hole of the oil cylinder piston.

Two oil ports of the hydraulic driving device are connected with an electro-hydraulic control device through pipelines, and the electro-hydraulic control device comprises a motor, an oil pump, an oil absorption filter, an oil return filter, a proportional overflow valve, an electromagnetic directional valve, a common speed regulating valve and a proportional flow valve; the oil pump driven by a motor is connected with an oil absorption filter arranged in the oil cylinder through a pipeline, the oil pump is connected with an electromagnetic directional valve through a pipeline, a proportional overflow valve is arranged on the pipeline, the pipeline of the electromagnetic directional valve is connected with an oil return filter arranged in the oil cylinder, the electromagnetic directional valve is also respectively connected with two oil ports of a hydraulic driving device through two pipelines, a common speed regulating valve is arranged in two pipeline supports, and a proportional flow valve is arranged on one pipeline; make pressure control or displacement control's switching through the solenoid directional valve, control hydro-cylinder among the hydraulic drive device is fixed hydro-cylinder, the hydro-cylinder piston with be equipped with two tapered roller bearings between the pressure disk and through fastening sleeve hydro-cylinder piston, tapered roller bearing c and pressure disk at axial fixity connection to guarantee that the hydro-cylinder piston can come and go under the effect of oil pressure and do axial displacement to the drive pressure disk that does not have the return error, avoid the rotatory hydro-cylinder piston motion that drives of pressure disk simultaneously through tapered roller bearing c's design.

A control method of a water-cooled magnetorheological clutch based on an extrusion-shear mode comprises the following steps:

when the clutch works, the excitation coil is utilized to control the shear yield strength of the magnetorheological fluid in the working space of the magnetorheological fluid so as to change the transmission capacity of the clutch; when the load torque is smaller, the magnitude of the transmission torque and the rotating speed is controlled by adjusting the magnitude of the input current in the excitation coil; when the required load torque exceeds the upper limit of current regulation, the hydraulic driving device is started to drive the oil cylinder piston to provide axial extrusion stress, the oil cylinder piston is transmitted by the pressure plate to drive the middle driving disc to move towards the left driving disc in the magnetorheological fluid working gap, so that the magnetorheological fluid magnetic chain structure in the magnetorheological fluid working gap between the left driving disc and the middle driving disc is compressed, the magnetorheological fluid forms a more compact columnar structure under the action of the extrusion stress to bring stronger anti-shearing yield strength, the driving assembly can transmit larger torque to the driven assembly, and the driven assembly finally transmits the torque to the ball spline shaft through the pressure plate.

Defining the space on the left side of an oil cylinder piston in an oil cylinder as an oil cylinder left cavity and the right side as an oil cylinder right cavity;

when the hydraulic driving device is started, under the driving of a motor, pressure oil supplied by an oil pump from an oil tank is filtered by an oil absorption filter, clean pressure oil firstly flows into a left cavity of the oil cylinder from a right flow of an electromagnetic directional valve, redundant oil flow q1 flows into the right cavity of the oil cylinder through a common speed regulating valve respectively at a flow q2 and returns to the oil tank through a proportional flow valve at a flow q 3; at this time, q2 is q1-q 3; when q1 is greater than q3, q2 is greater than 0, and the oil cylinder piston advances; when q1 is less than q3, q2 is less than 0, and the oil cylinder piston moves backwards; the advancing and retreating of the oil cylinder piston can be realized under the condition of no need of reversing by an electromagnetic reversing valve by adjusting the opening degree of the proportional flow valve, and the displacement control of the oil cylinder piston can be realized by matching with a displacement sensor; in addition, the proportional overflow valve is prevented from working under a small valve opening all the time, so that the micro-feeding control of the oil cylinder piston is realized; when the extrusion stress is controlled, the electromagnetic directional valve enters the right position to work, pressure oil freely flows into the right cavity of the oil cylinder through the right position of the electromagnetic directional valve and the common speed regulating valve, the left cavity directly returns to the oil tank, and the feeding pressure of the oil cylinder can be controlled by regulating and controlling the pressure of the proportional overflow valve.

Has the advantages that:

1) through built-in hydro-cylinder and piston in the clutch structure, can exert the extrusion intensification effect to magnetorheological suspensions, expand single shear flow mode into extrusion-shear hybrid mode, greatly strengthened the torque transmission upper limit of clutch, torque transmission route: the device comprises a driving shaft, left and right transmission discs, magnetorheological fluid, an intermediate transmission disc, a pressure plate, a ball spline sleeve and a ball spline shaft; axial reciprocating motion route: piston-fastening sleeve-pressure plate-intermediate drive plate;

2) the middle transmission disc is pushed to move axially through the hydraulic oil cylinder, in order to overcome the defect that the middle transmission disc drives an oil cylinder piston to rotate, a pair of bearings are additionally arranged on the outer side of the pressure plate to eliminate the relative rotation between the pressure plate and the piston, and finally the relative rotation between the oil cylinder and the middle transmission disc is eliminated; in order to eliminate the return error between the intermediate transmission disc and the oil cylinder piston, a fastening sleeve is used for axial fastening; in order to realize that the intermediate transmission disc and the ball spline can synchronously rotate to transmit torque and make axial movement between the intermediate transmission disc and the ball spline without mutual interference, the intermediate transmission disc and the pressure plate can make axial movement on a driven shaft through a sleeve of the ball spline by small rolling friction through the structure of the pressure plate and the ball spline, and the extrusion stress of the hydraulic driving device on magnetorheological fluid is directly controlled.

4) The left transmission disc is internally provided with a plurality of circumferentially extending annular cooling water flow channels and a plurality of radial cooling water flow channels, wherein the annular cooling water flow channels are of a structure with a channel section adopting an uneven and staggered structure, the relationship between the Plantt number of fluid and a fluid temperature boundary layer and a flow boundary layer is changed, the laminar flow of the cooling water is converted into a complex flow state of turbulent flow and secondary vortex, and the heat exchange efficiency between fluid-solid coupling surfaces is increased; the radial cooling water flow channels are multi-section radial spaced circular flow channels, so that the effect of effective cooling can be achieved, the magnetic resistance can be effectively reduced, and the size of the magnet exciting coil can be reduced;

the defect that all or most of cooling water flows to the outermost side cooling channel under the action of the rotary centrifugal force is overcome, and the cooling water optimally flows to the flow channels at radial intervals according to the radial distribution of the temperature in the working gap of the magnetorheological fluid.

Drawings

FIG. 1 is a schematic diagram of a water-cooled magnetorheological clutch based on an extrusion-shear mode according to the present invention;

FIG. 2 is a schematic diagram of the electro-hydraulic control device of the present invention;

FIG. 3(a) is an elevation view of the cooling water flow path within the left drive disk of the present invention;

FIG. 3(b) is a cross-sectional view A-A of the cooling water flow passage in the left drive plate of the present invention;

FIG. 3(c) is a schematic view of the structure of the circular cooling water flow channel of the left transmission disc of the present invention;

fig. 4 is a schematic view of the structure of the intermediate transmission disc of the present invention.

In the figure: 1-driving shaft; 2-sealing ring; 3-left end cap; 4-locking nut a; 5-tapered roller bearing a; 6-left bearing seat; 7-left magnetic conductive outer shell; 8-a field coil; 9-magnetism isolating sleeve; 10-O type sealing ring a; 11-right driving plate; 12-a right magnetically permeable housing; 13-a fastening sleeve; 14-a platen; 15-O-shaped sealing ring b; 16-cylinder piston; 17-a cylinder barrel of the oil cylinder; 18-right bearing seat; 19-piston stroke adjusting backing ring; 20-right end cap; 21-a locking nut b; a-ball spline shaft; b-ball spline sleeve; 23-tapered roller bearing b; 24-a displacement sensor; 25-gley seal ring; 26-cylinder cover; 27-tapered roller bearing c; 28-circlip; 29-H type seal ring; 30-magnetorheological fluid working space; 31-an intermediate transmission disc; 32-left driving disc; 33-a motor; 34-an oil pump; 35-an oil absorption filter; 36-an oil return filter; 37-proportional relief valve; 38-a solenoid directional valve; 39-common speed regulating valve; 40-proportional flow valve.

Detailed Description

Embodiments of the invention are further described below with reference to the accompanying drawings:

as shown in fig. 1, the water-cooled magnetorheological clutch based on the extrusion-shear mode of the invention comprises a left magnetic conduction shell 7 and a right magnetic conduction shell 12 which are connected by bolts, wherein two sides of the left magnetic conduction shell 7 and the right magnetic conduction shell 12 are axially opened, a cavity is arranged inside the buckled left magnetic conduction shell 7 and the right magnetic conduction shell 12, an excitation coil 8 is arranged in the cavity, a clutch main body is arranged inside the excitation coil 8, and the clutch main body comprises a driving component, a driven component and a hydraulic driving component, and is characterized in that:

the driving component comprises a driving shaft 1, a left end cover 3, a locking nut a4, a tapered roller bearing a5, a left bearing seat 6, a left transmission disc 32, a magnetism isolating sleeve 9 and a right transmission disc 11; the left bearing seat 6 is fixed in an axial hole of the left magnetic conduction shell 7 by a bolt, the driving shaft 1 passes through the left bearing seat 6 and is fixedly connected with the left transmission disc 32 by a bolt, a plurality of cooling water flow passages for heat dissipation are arranged in the left transmission disc 32, a cooling water passage connected with a water outlet hole in the driving shaft 1 is positioned in the axial circle center, the cooling water passage connected with a water inlet is arranged at the upper side and the lower side of the circle center, a pair of tapered roller bearings a5 is arranged between the driving shaft 1 and the left bearing seat 6, a left end cover 3 for fixing the driving shaft 1 is arranged on the left bearing seat 6, a plurality of sealing rings 2 are arranged between the left end cover 3 and a bracket for fixing the driving shaft 1, a locking nut a4 is arranged between the left end cover 3 and the left bearing seat 6, the tapered roller bearings a5 are axially positioned by utilizing the locking nut a4, a plurality of cooling water passages are arranged in, a magnetic isolation sleeve 9 is fixedly arranged between the outer circumferences of the left transmission disc 32 and the right transmission disc 11 through bolts, a magnetorheological fluid working space 30 is reserved between the left transmission disc 32 and the magnetic isolation sleeve 9 as well as between the left transmission disc 11 and the right transmission disc 32, and O-shaped sealing rings a10 are respectively arranged between the magnetic isolation sleeve 9 and the left transmission disc 32 as well as between the magnetic isolation sleeve 9 and the right transmission disc 11 for static sealing;

as shown in fig. 4, a bolt hole fixedly connected with the pressure plate 14 is formed in the center of the circle of the intermediate transmission disc 31, fan-shaped openings evenly distributed around the circle are formed in the outer side of the circular hole, when the intermediate transmission disc 31 axially moves to extrude a magnetic column chain formed by magnetorheological fluid, redundant magnetorheological fluid flows into a working gap on the right side of the intermediate transmission disc 31, and can axially reciprocate under the driving of the pressure plate 14 while transmitting torque through rotational motion; the center of the right transmission disc 11 is provided with an opening for accommodating the pressure plate 14 to pass through, an elastic check ring 28 and an H-shaped sealing ring 29 are arranged between the pressure plate 14 and the opening in the right transmission disc 11, the pressure plate 14 passes through the right transmission disc 11 to be connected with the middle transmission disc 31, the elastic check ring 28 and the H-shaped sealing ring 29 are used for ensuring that magnetorheological fluid is not easy to leak when the pressure plate 14 drives the middle transmission disc 31 and the right transmission disc 11 to axially reciprocate and rotate, the H-shaped sealing ring 29 is made of carbon fiber filler Teflon and has a good sealing effect, and the elastic check ring is used for axially positioning the H-shaped sealing ring to prevent the reduction of the sealing effect caused by transmission when the pressure plate 14 axially moves relative to the right transmission disc;

the driven assembly comprises a ball spline, a pressure plate 14, a right bearing seat 18, a right end cover 20, a locking nut b21, an intermediate transmission plate 31 and a tapered roller bearing b23, wherein the ball spline comprises a ball spline shaft 22.a and a ball spline sleeve 22.b, the pressure plate 14 is arranged outside the ball spline sleeve 22.b, the right bearing seat 18 is arranged outside the ball spline shaft 22.a, the intermediate transmission plate 31 is arranged in the magnetorheological fluid working space 30 of the driving assembly, the right center of the intermediate transmission plate 31 is connected with the pressure plate 14 through a bolt, the pressure plate 14 penetrates through the right transmission plate 11, the pressure plate 14 is connected with the ball spline sleeve 22.b through a flat key to transmit torque, the pressure plate 14 can transmit the torque to the ball spline shaft through the ball spline and can move axially relative to the ball spline shaft, so that the pressure plate 14 can transmit the torque to the ball spline shaft 22.a while driving the intermediate transmission plate 31 to move axially under the action of the hydraulic driving, the ball spline shaft 22.a is radially supported on the right bearing housing 18 by a pair of tapered roller bearings b23 while being axially positioned by a lock nut b21, and the right end cover 20 is fixedly connected to the right bearing housing 18 by screws;

the hydraulic driving assembly comprises a fastening sleeve 13, a tapered roller bearing c27, an oil cylinder and a Gelai sealing ring 25; the oil cylinder comprises an oil cylinder cover 26, an oil cylinder barrel 17 and an oil cylinder piston 16, wherein a fastening sleeve 13 is arranged in an opening at the right side of a right magnetic conduction shell 12 and on the outer side of a pressure plate 14, a pair of tapered roller bearings c27 are arranged between the fastening sleeve 13 and the pressure plate 14 and used for preventing the oil cylinder piston 16 from rotating along with the pressure plate 14, the oil cylinder piston 16 is a hollow piston, a right bearing seat 18 is arranged in the oil cylinder piston 16, the oil cylinder piston 16 is arranged in the oil cylinder barrel 17, the axial opening of the right magnetic conduction shell 12 is in bolted connection with the oil cylinder barrel 17 through the oil cylinder cover 26, an O-shaped sealing ring b15 is arranged in a bracket of the oil cylinder cover 26 and the oil cylinder piston 16, the oil cylinder piston 16 forms contact type sealing with the oil cylinder barrel 17 through a Gelai sealing ring 25 to prevent oil leakage in the oil cylinder, a pair of tapered roller bearings c, The inner side of the oil cylinder barrel 17 is connected with the fastening sleeve 13 through a connecting buckle, the oil cylinder barrel 17 is respectively provided with two oil ports, the oil cylinder piston 16 can be controlled to axially reciprocate in the oil cylinder through oil, so that the intermediate transmission disc 31 is driven to axially move leftwards or rightwards in the magnetorheological fluid working space 30 through the pressure plate 14, magnetorheological fluid wrapping the intermediate transmission disc 31 is arranged in the magnetorheological fluid working space 30, a piston stroke adjusting backing ring 19 is arranged between the oil cylinder piston 16 and the right end cover 20 in the oil cylinder barrel 17, and the stroke of the hydraulic driving assembly is adjusted by adjusting the piston stroke adjusting backing ring 19.

As shown in fig. 3(a), 3(b) and 3(c), the cooling water flow channel in the left driving disc 32 includes a plurality of circumferentially extending annular cooling water flow channels and a plurality of radial cooling water flow channels, wherein the plurality of annular cooling water flow channels are all of a concave-convex zigzag structure, the plurality of radial cooling water flow channels include a cooling water outlet channel transversely connecting all the annular cooling water flows and two cooling water inlet channels vertically arranged above and below the cooling water outlet channel, the cooling water outlet channel and the cooling water inlet channel are all of a multi-stage ladder structure, the number of stage stages is the same as that of the annular cooling water flow channels, and the stage is wider near the center of the left driving disc 32 and narrower near the circumference; inlets, which are intersected between the annular cooling water flow channel extending in the circumferential direction and the plurality of radial cooling water flow channels, have different orifice diameters; the cooling effect on the left transmission disc 32 can be ensured, most area of the left transmission disc 32 can be kept in a solid structure and high magnetic conductivity can be kept, a water hole connected with a water outlet hole of the driving shaft 1 is formed in the center of a cooling water outlet channel in the specific left transmission disc 31, two vertically arranged cooling water inlet channels are not directly communicated with the cooling water outlet channel, two water holes connected with a water inlet of the driving shaft 1 are respectively formed in the two cooling water inlet channels, and a plurality of annular cooling water channels which are mutually nested are arranged between the water inlet pipe and the water outlet pipe;

the cooling water flows into the upper and lower cooling water inlet channels in the left transmission disc 32 from the water inlet hole on the driving shaft 1, when the cooling water passes through the circular cooling water channel with the smallest inner diameter, a part of the cooling water enters the circular cooling water channel, passes through the left and right cooling water outlet channels, flows into the axial cooling water channel on the driving shaft 1 from the water hole in the center, and flows out from the water outlet hole, the other part of the cooling water continues to flow to the outer diameter direction through the upper and lower water inlet channels under the action of the rotating centrifugal force, the radial cooling water channel is in a step shape, the diameter of the channel is smaller towards the outer diameter direction, so that the liquid resistance effect is generated, the cooling water is prevented from flowing to the outermost circular cooling water channel under the action of the centrifugal force, the inside is difficult to cool, the circular cooling water channel structure is a zigzag concave-convex structure, and the relation between the Plantt number of, the laminar flow of the cooling water is converted into a complex flow state of turbulent flow and secondary vortex, the heat exchange efficiency between fluid-solid coupling surfaces is increased, and the defect that all or most of the cooling water flows to the outermost side cooling channel under the action of the rotary centrifugal force during working is overcome.

And a displacement sensor 24 for measuring the displacement of the oil cylinder piston 17 is arranged between the right bearing seat 18 and the inner hole of the oil cylinder piston 17.

As shown in fig. 2, two oil ports of the hydraulic driving device are connected with an electro-hydraulic control device through a pipeline, and the electro-hydraulic control device comprises a motor 33, an oil pump 34, an oil suction filter 35, an oil return filter 36, a proportional overflow valve 37, an electromagnetic directional valve 38, a common speed regulating valve 39 and a proportional flow valve 40; wherein, an oil pump 34 driven by a motor 33 is connected with an oil suction filter 35 arranged in the oil cylinder through a pipeline, the oil pump 34 is connected with an electromagnetic directional valve 38 through a pipeline, the pipeline is provided with a proportional overflow valve 37, the pipeline of the electromagnetic directional valve 38 is connected with an oil return filter 36 arranged in the oil cylinder, the electromagnetic directional valve 38 is also respectively connected with two oil ports of a hydraulic driving device through two pipelines, a common speed regulating valve 39 is arranged in two pipeline brackets, and one pipeline is provided with a proportional flow valve 40; make pressure control or displacement control's switching through solenoid directional valve 38, control cylinder 16 among the hydraulic drive device is fixed hydro-cylinder, hydro-cylinder piston 16 with be equipped with two tapered roller bearings 26 between the pressure disk 14 and through fastening sleeve 13 hydro-cylinder piston 16, tapered roller bearing c27 and pressure disk 14 at axial fixity connection to guarantee that hydro-cylinder piston 16 can reciprocate under the effect of oil pressure and do axial displacement to the drive pressure disk 14 that does not have the return error, avoid the rotatory hydro-cylinder piston 16 motion of driving of pressure disk 14 through the design of tapered roller bearing c27 simultaneously.

A control method of a water-cooled magnetorheological clutch based on an extrusion-shear mode comprises the following steps:

when the clutch works, the magnetic exciting coil 8 is utilized to control the viscosity of the magnetorheological fluid in the magnetorheological fluid working space 30 so as to change the transmission capacity of the clutch; when the load torque is small, the size of the transmission torque and the rotating speed is controlled by adjusting the size of the input current in the exciting coil 8; when the required load torque exceeds the upper limit of current regulation, the hydraulic driving device is started to drive the oil cylinder piston 16 to provide axial extrusion stress, the displacement of the oil cylinder piston 16 drives the middle driving disc 31 to move towards the left driving disc 32 in the magnetorheological fluid working gap 30 through the transmission of the pressure 14 disc, so that the magnetorheological fluid magnetic chain structure in the magnetorheological fluid working gap 30 between the left driving disc 32 and the middle driving disc 31 is compressed, the magnetorheological fluid forms a more compact columnar structure under the action of the extrusion stress to bring stronger anti-shearing yield strength, the driving assembly can transmit larger torque to the driven assembly, and the driven assembly finally transmits the torque to the ball spline shaft 22.a through the pressure disc 14.

The space on the left side of the oil cylinder piston 16 in the oil cylinder is defined as an oil cylinder left cavity, and the space on the right side is defined as an oil cylinder right cavity;

when the hydraulic driving device is started, under the driving of the motor 33, after pressure oil supplied from the oil tank by the oil pump 34 is filtered by the oil absorption filter 35, clean pressure oil firstly flows into the left cavity of the oil cylinder from the right side of the electromagnetic directional valve 38, redundant oil flow q1 flows into the right cavity of the oil cylinder through the common speed regulating valve 39 at the flow q2 respectively, and returns to the oil tank through the proportional flow valve 40 at the flow q 3; at this time, q2 is q1-q 3; when q1 is greater than q3 and q2 is greater than 0, the oil cylinder piston 16 advances; when q1 is less than q3, q2 is less than 0, and the oil cylinder piston 16 moves back; the advance and retreat of the oil cylinder piston 16 can be realized under the condition of no reversing of the electromagnetic reversing valve 38 by adjusting the opening degree of the proportional flow valve 40, and the displacement control of the oil cylinder piston 16 can be realized by matching with the displacement sensor 24; in addition, the proportional overflow valve 37 is prevented from working under a small valve opening all the time, so that the micro-feeding control of the oil cylinder piston 16 is realized; when the extrusion stress is controlled, the electromagnetic directional valve 38 enters the right position to work, pressure oil freely flows into the right cavity of the oil cylinder through the right position of the electromagnetic directional valve 38 and the common speed regulating valve 39, the left cavity directly returns to the oil tank, and the pressure of the proportional overflow valve 37 is regulated and controlled, namely the feeding pressure of the oil cylinder can be controlled.

When the load torque is small, the magnitude of the transmission torque and the rotation speed is controlled by adjusting the magnitude of the input current in the exciting coil. When the required load torque exceeds the upper limit of current regulation, the control signal of the proportional overflow valve is changed to cooperate with the pressure sensor of the right cavity of the oil cylinder to realize the axial extrusion stress control. The displacement of piston drives middle driving disc through the transmission of pressure disk and removes in magnetorheological suspensions working gap, compresses the magnetic linkage structure in the working gap, forms more closely knit columnar structure under the effect of this extrusion stress and brings stronger anti-shear yield strength, therefore the main drive shaft subassembly can be to the bigger torque of middle driving disc transmission, and middle driving disc is final to torque transmission for ball spline shaft through the pressure disk. The invention can make the magnetic rheological fluid clutch transmit the torque value which is several times of that under the control of single current through the double control of the current of the magnet exciting coil and the electro-hydraulic control system (or pressure). When the clutch is in the slip speed regulation stage for a long time, cooling water enters through the water inlet, finally reaches the water flow channel structure which is circumferentially extended in the left transmission disc and radially spaced and has a surface structure with concave-convex staggered distribution through the radial and axial water holes of the driving shaft, and the complex turbulence and secondary vortex flow state of the water flow channel structure can bring high-efficiency heat exchange efficiency, so that the heat dissipation capacity of the clutch is enhanced.