A magnetorheological damper with an external active dispersion device

Abstract

The present invention discloses a magnetorheological damper with an external active dispersion device, comprising a cylinder, a power device, an electromagnetic assembly and a rotor; the power device is located outside the cylinder; the output end of the power device is connected to the closed end of the cylinder, and the output end of the power device is inserted into the closed end of the cylinder; the electromagnetic assembly is located inside the cylinder; the lower end of the electromagnetic assembly is supported on the closed end; the rotor is located inside the cylinder, and the protruding shaft of the rotor is inserted into the closed end of the cylinder and is fixedly connected to the output end of an external motor; the present invention directly drives the rotor to rotate through the power device, and compared with installing a built-in motor at the bottom of the damper, the problem of weakening the gap magnetic field due to filling the gap between the rotor and the stator with magnetorheological fluid is solved. At the same time, the power device is easy to drive and simple to control.

Description

Technical Field

[0001] The patent of this invention belongs to the field of buffer technology, and specifically relates to a magnetorheological damper with an external active dispersion device. Background Art

[0002] Magnetorheological fluid is a new type of intelligent material, which is a mixture of tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic conductive liquid. Magnetorheological fluid exhibits low-viscosity Newtonian fluid characteristics under zero magnetic field conditions, and the apparent viscosity is very small; under the action of a strong magnetic field, it can exhibit high viscosity and low fluidity Bingham body characteristics in a short time, and intuitively presents a solid-like state. Moreover, this change is continuous and reversible. This property makes it have extremely broad application prospects in shock absorbers, brake devices, medical, aerospace materials and automatic weapons.

[0003] Magnetorheological damper is a new type of structural semi-active control device with magnetorheological fluid as the medium. Its output damping force can be controlled in real time by the working current. It also has excellent characteristics such as large output damping force, wide dynamic range, fast response speed and low power consumption. It has broad application prospects in the field of vibration and buffering.

[0004] Although magnetorheological dampers have many advantages, they have not been widely used in the engineering field. The fundamental reason is that the sedimentation problem of magnetorheological fluid has not been effectively solved. Due to the density difference between magnetic particles and carrier fluid, under the effect of gravity, the sedimentation of magnetic particles in the carrier fluid is inevitable. In the military field, the magnetorheological damper device is stationary for a long time, and the sedimentation problem of magnetorheological fluid is more serious. For a long time, the main focus of researchers in solving the sedimentation problem of magnetorheological fluid has been on improving the suspension stability. Solving the sedimentation problem of magnetorheological fluid from the mechanical structure is relatively complicated.

[0005] In the prior art, the settlement problem of the magnetorheological damper when stationary can be effectively solved by installing a built-in motor at the bottom of the damper. However, since the gap between the rotor and the stator is filled with magnetorheological fluid, the gap magnetic field is weakened, the motor is difficult to drive, and the built-in motor is very complicated to control.

[0006] Therefore, there is a need in the prior art for a damper that overcomes the above problems. Summary of the invention

[0007] The technical solution adopted to achieve the purpose of the present invention is as follows: a magnetorheological damper with an external active dispersion device includes a cylinder, a power device, an electromagnetic component and a rotor.

[0008] The upper end of the cylinder is open, and the lower end is a closed end. The cylinder is filled with magnetorheological fluid.

[0009] The power device is located outside the cylinder, the power device is connected to the closed end of the cylinder, and the output end of the power device penetrates into the closed end of the cylinder.

[0010] An outer coil is wound around the electromagnetic assembly. The electromagnetic assembly is located inside the cylinder.

[0011] A protruding shaft is provided on the end surface of the rotor. The rotor is located in the cylinder barrel, and the protruding shaft of the rotor penetrates into the closed end of the cylinder barrel and is fixedly connected to the output end of the power device.

[0012] The output end of the driving power device drives the rotor to rotate, and the rotor drives the magnetorheological fluid to generate a rotating flow in the cylinder.

[0013] Furthermore, it also includes a top cover, an upper baffle, a working cylinder, a piston assembly, a piston rod and a positioning piece.

[0014] The middle part of the top cover is a through hole I. The top cover is inserted into the inner wall of the upper end of the cylinder barrel.

[0015] The lower end of the electromagnetic assembly is supported on the closed end. The rotor is located inside the electromagnetic assembly, an inner channel is formed between the rotor and the electromagnetic assembly, and an outer channel is formed between the electromagnetic assembly and the cylinder.

[0016] The upper baffle is in the shape of a disk, and has a circular hole in the center of its upper end surface. A plurality of through holes V are evenly distributed on the upper end surface of the upper baffle. The upper baffle is fixed to the upper end surface of the electromagnetic assembly. The through hole V of the upper baffle is connected to the inner channel. A protruding shaft is extended from the end surface of the rotor away from the closed end, and the protruding shaft is inserted into the circular hole of the upper baffle.

[0017] The working cylinder is cylindrical, and its upper and lower ends are both open. The inner wall of the working cylinder is evenly distributed with a plurality of flow grooves and a plurality of through holes VI in the circumferential direction, wherein the flow groove is located below the through hole VI. The position of the flow groove is recorded as the equilibrium position.

[0018] The working cylinder is located in the cylinder barrel and has a gap with the cylinder barrel. The lower end of the working cylinder is mounted on the upper end surface of the upper baffle, and the upper end of the working cylinder is mounted on the lower end surface of the top cover. The space between the outer wall of the working cylinder and the inner wall of the cylinder barrel is recorded as the flow cavity, and the space inside the working cylinder is recorded as the inner cavity S.

[0019] The piston assembly is located in the working cylinder and has a gap between the piston assembly and the working cylinder.

[0020] The piston assembly divides the inner cavity S, forming an upper oil cavity above the piston assembly and a lower oil cavity below the piston assembly.

[0021] The lower end of the piston rod is mounted on the piston assembly, and the upper end thereof passes through the through hole I of the top cover.

[0022] The positioning piece is in the shape of a hollow disc and is inserted into the open portion of the upper end of the cylinder barrel to press the end cover tightly.

[0023] When at rest, the piston assembly is in a balanced position.

[0024] When the base is under pressure, the piston rod pushes the piston assembly downward, and the piston assembly leaves the equilibrium position. The magnetorheological fluid in the lower oil chamber enters the flow chamber through the inner channel and the outer channel, and flows into the upper oil chamber through the through hole VI of the working cylinder.

[0025] When the piston rod is restored, the magnetorheological fluid in the upper oil chamber enters the flow chamber through the through hole VI of the working cylinder, and flows into the lower oil chamber of the working cylinder through the outer channel and the inner channel.

[0026] Further, the upper end surface of the upper baffle plate is provided with a circular annular boss I. The lower end surface of the top cover is provided with a circular annular boss II.

[0027] The lower end of the working cylinder is sleeved on the annular boss I, and the upper end of the working cylinder is sleeved on the annular boss II.

[0028] Furthermore, the power device is a motor or a rotating handle.

[0029] Furthermore, the closed end of the cylinder is cylindrical. A partition is provided inside the closed end, the partition separates the base, and a power device accommodating chamber is formed at the lower end of the partition. A through hole II is provided in the middle of the partition.

[0030] The power device is installed in the power device accommodating chamber, and its output end penetrates into the through hole II of the partition. The extended shaft at the lower end of the rotor penetrates into the through hole II of the partition and is fixedly connected to the output end of the power device.

[0031] The upper surface of the partition is uniformly provided with a plurality of limit grooves in the circumferential direction. The bottom of the limit groove is provided with a through hole III. The lower end of the electromagnetic assembly is provided with a plurality of bosses, each of which is correspondingly inserted into a limit groove of the partition.

[0032] Furthermore, a sealing groove is provided on the hole wall of the through hole II, and an O-type sealing ring is installed in the sealing groove.

[0033] Furthermore, a through hole IV is provided on the bottom surface of the boss. The through hole IV is connected to the annular groove I. The positive and negative leads of the outer coil pass through the through hole IV, and are led out from the through hole III of the separator to connect to an external power source.

[0034] Furthermore, the outer wall of the rotor is provided with spiral ribs or spiral blades.

[0035] Furthermore, the electromagnetic component is a yoke.

[0036] The technical effect of the present invention is undoubted, and it has the following advantages:

[0037] 1) The present invention directly drives the rotor to rotate through an external power device. Compared with installing a built-in motor at the damping bottom, it solves the problem of filling the gap between the rotor and the stator with magnetorheological fluid, which leads to weakening of the gap magnetic field and difficulty in driving the motor. At the same time, the external power device is easy to drive and simple to control.

[0038] 2) When the damper is stationary, the external power device is driven to drive the rotor to rotate. The spiral ribs of the rotor drive the magnetorheological fluid to produce a rotating flow, so that the settled magnetorheological fluid can be redispersed, solving the sedimentation problem of the magnetorheological fluid.

[0039] 3) When the damper is compressed, the coil is energized to generate a magnetic field, and the damping force generated by the flow is changed due to the magnetorheological effect, thereby realizing a damper with controllable damping. The current size can be closed-loop controlled according to the motion state of the damper. Under the action of the controllable magnetic field, the magnetorheological fluid generates a large controllable damping force for vibration reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the present invention;

[0041] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure;

[0042] Figure 3 It is a schematic diagram of the closed end structure of the cylinder of the present invention;

[0043] Figure 4 It is a schematic diagram of the structure of the electromagnetic component of the present invention;

[0044] Figure 5 It is a schematic diagram of the upper baffle structure of the present invention;

[0045] Figure 6 It is a schematic diagram of the rotor structure of the present invention;

[0046] Figure 7 It is a schematic diagram of the working cylinder structure of the present invention;

[0047] Figure 8 The figure is a schematic diagram of the application structure of the present invention in artillery recoil.

[0048] In the figure: cylinder 1, top cover 2, through hole I201, annular boss II202, closed end 3, partition 301, through hole II3011, sealing groove 30111, limit groove 3012, through hole III3013, power device 4, electromagnetic assembly 5, annular groove I501, outer coil 502, boss 503, through hole IV5031, annular groove II504, upper baffle 6, circular hole 601, through hole V602, annular boss I603, rotor 7, extending shaft 701, spiral rib 702, working cylinder 8, flow groove 801, through hole VI802, piston assembly 9, guide ring 901, piston rod 10, positioning member 11, flow chamber S1, upper oil chamber S2 and lower oil chamber S3. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0050] Embodiment 1:

[0051] This embodiment discloses a magnetorheological damper with an external active dispersion device, see Figure 1 and Figure 2 , including a cylinder 1, a top cover 2, a power device 4, an electromagnetic component 5, an upper baffle 6, a rotor 7, a working cylinder 8, a piston component 9, a piston rod 10 and a positioning member 11.

[0052] The cylinder 1 is open at the upper end and closed at the lower end 3. The open ends of the cylinder 1 are all provided with internal threads. The cylinder 1 is filled with magnetorheological fluid.

[0053] The middle part of the top cover 2 is a through hole I201. The end surface of the lower end of the top cover 2 is provided with a circular boss II202. The top cover 2 is inserted into the inner wall of the upper end of the cylinder barrel 1. The top cover 2 and the cylinder barrel 1 are sealed by an O-ring.

[0054] See also Figure 3 , the closed end 3 is cylindrical. The closed end 3 has a partition 301 inside, and the partition 301 divides the closed end 3, and a power device accommodating chamber is formed at the lower end of the partition 301. The middle part of the partition 301 has a through hole II3011. The upper surface of the partition 301 is evenly distributed with a plurality of limiting grooves 3012 in the circumferential direction. The bottom of the limiting groove 3012 is provided with a through hole III3013. The hole wall of the through hole II3011 is provided with a sealing groove 30111. The sealing groove 30111 is equipped with an O-ring to ensure sealing.

[0055] The outer wall of the upper end of the closed end 3 is provided with an external thread. The inner wall of the lower end of the cylinder 1 is provided with an internal thread, and the upper end of the closed end 3 is connected to the lower end of the cylinder 1 through a thread. The closed end 3 and the cylinder 1 are sealed by an O-ring.

[0056] The power device 4 is installed in the power device accommodating chamber, and its output end penetrates into the through hole II3011 of the partition 301. In this embodiment, the power device 4 is a motor, and the output shaft of the motor penetrates into the through hole II3011 of the partition 301.

[0057] See also Figure 4 , the electromagnetic component 5 is cylindrical, and its outer wall has an annular groove I501. An outer coil 502 is wound in the annular groove I501. The electromagnetic component 5 is located inside the cylinder 1. A plurality of bosses 503 are evenly distributed on the circumference of the lower end surface of the electromagnetic component 5, and each boss 503 is correspondingly inserted into a limiting groove 3012 of the partition 301. A through hole IV5031 is provided on the bottom surface of the boss 503. The through hole IV5031 is connected to the annular groove I501. The positive and negative leads of the outer coil 502 are inserted through the through hole IV5031, and are led out from the through hole III3013 of the partition 301 to connect to an external power supply. In this embodiment, the electromagnetic component 5 adopts a yoke.

[0058] See also Figure 5 The upper baffle plate 6 is disc-shaped, and has a circular hole 601 at the center of its upper end surface. Four through holes V602 are evenly distributed on the upper end surface of the upper baffle plate 6. The upper baffle plate 6 is fixed on the upper end surface of the electromagnetic assembly 5. A circular annular boss I603 is provided on the upper end surface of the upper baffle plate 6.

[0059] See also Figure 6 The rotor 7 is a cylinder, and the center of the end faces of both ends of the rotor 7 has a protruding shaft 701. The rotor 7 is located inside the electromagnetic assembly 5. The protruding shaft 701 at the lower end of the rotor 7 is inserted into the through hole II3011 of the partition 301 and is fixedly connected to the output shaft of the motor through a coupling. The protruding shaft 701 at the upper end of the rotor 7 is inserted into the circular hole 601 of the upper baffle 6. The outer wall of the rotor 7 is processed with spiral ribs 702.

[0060] An inner channel is formed between the rotor 7 and the electromagnetic assembly 5. The inner channel is connected to the through hole V602 of the upper baffle 6. An outer channel is formed between the electromagnetic assembly 5 and the cylinder 1. The lower end of the electromagnetic assembly 5 is supported by the boss 503, and a space connecting the inner channel and the outer channel is formed below the electromagnetic assembly 5.

[0061] See also Figure 7The working cylinder 8 is cylindrical, and its upper and lower ends are both open. The inner wall of the working cylinder 8 is evenly distributed with a plurality of flow grooves 801 and a plurality of through holes VI802 in the circumferential direction, wherein the flow grooves 801 are located below the through holes VI802. The position of the flow grooves 801 is recorded as the equilibrium position.

[0062] The working cylinder 8 is located in the cylinder barrel 1 and has a gap with the cylinder barrel 1. The lower end of the working cylinder 8 is sleeved on the annular boss I603 of the upper baffle 6, and the upper end of the working cylinder 8 is sleeved on the annular boss II202 of the top cover 2. The space between the outer wall of the working cylinder 8 and the inner wall of the cylinder barrel 1 is recorded as the flow cavity S1, and the space inside the working cylinder 8 is recorded as the inner cavity S.

[0063] The piston assembly 9 is located in the working cylinder 8 and has a gap between the piston assembly 9 and the working cylinder 8. A guide ring 901 is sleeved on the outer wall of the piston assembly 9 to play a guiding role.

[0064] The piston assembly 9 divides the inner cavity S, forming an upper oil cavity S2 above the piston assembly 9 and a lower oil cavity S3 below the piston assembly 9 .

[0065] The lower end of the piston rod 10 is mounted on the piston assembly 9 , and the upper end thereof passes through the through hole I201 of the top cover 2 .

[0066] The positioning member 11 is in the shape of a hollow disk. The outer wall of the positioning member 11 has threads. The positioning member 11 is connected to the open portion of the upper end of the cylinder barrel 1 through threads to press the upper baffle 6 tightly.

[0067] The damper of this embodiment is suitable for aircraft landing gear and automobiles. In this embodiment, the equilibrium position of the piston assembly 9 is located at the middle position of the working cylinder 8, that is, the position of the flow groove 801 is located at the middle position of the working cylinder 8.

[0068] When the damper is at rest, the piston assembly 9 is in a balanced position. When the motor is powered on, the motor drives the rotor to rotate 7, and the spiral ribs 702 of the rotor 7 drive the magnetorheological fluid to generate a rotating flow in the inner channel. When the rotor 7 rotates, a pump effect is formed, causing the sedimentation magnetorheological fluid to circulate, forming a flushing effect and reducing sedimentation. The flow direction is related to the rotation direction of the spiral ribs 702. Forward flow: inner channel - circulation groove 801 - through hole VI802 - flow cavity S1 - outer channel - inner channel, and reverse flow is the opposite. Therefore, the motor can be driven regularly to reduce the sedimentation of the magnetorheological fluid of the damper when it is at rest.

[0069] During operation, the outer coil 502 is energized, and the electromagnetic component 5 forms a uniformly distributed magnetic field in the outer channel.

[0070] When the closed end 3 is pressurized, the piston rod 10 pushes the piston assembly 9 downward, and the piston assembly 9 leaves the equilibrium position. The magnetorheological fluid in the lower oil chamber S3 enters the flow chamber S1 through the inner channel and the outer channel, and flows into the upper oil chamber S2 through the through hole VI802 of the working cylinder 8.

[0071] When the piston rod 10 is restored, the magnetorheological fluid in the upper oil chamber S2 enters the flow chamber S1 through the through hole VI802 of the working cylinder 8, and flows into the lower oil chamber S3 of the working cylinder 8 through the outer channel and the inner channel.

[0072] The present embodiment discloses a magnetorheological damper with an external active dispersion device, which directly drives the rotor 7 to rotate through a motor. Compared with installing a built-in motor at the bottom of the damper, it solves the problem of weakening the gap magnetic field due to the magnetorheological fluid filling the gap between the rotor and the stator. At the same time, the motor is easy to drive and simple to control. When the damper is compressed, the external coil 502 is energized to generate a magnetic field in the outer channel. Due to the magnetorheological effect, the damping force generated by the flow is changed, thereby realizing a damper with controllable damping. The current size can be closed-loop controlled according to the motion state of the damper. Under the action of the controllable magnetic field, the magnetorheological fluid generates a large controllable damping force for vibration reduction. When the damper is stationary, the motor is energized to drive the rotor 7 to rotate, and the spiral ribs 702 of the rotor 7 drive the magnetorheological fluid to generate a rotating flow in the inner channel, so that the settled magnetorheological fluid can be redispersed, solving the sedimentation problem of the magnetorheological fluid.

[0073] Embodiment 2:

[0074] This embodiment discloses a magnetorheological damper with an external active dispersion device, see Figure 1 and Figure 2 , including a cylinder 1, a top cover 2, a power device 4, an electromagnetic component 5, an upper baffle 6, a rotor 7, a working cylinder 8, a piston component 9, a piston rod 10 and a positioning member 11.

[0075] The cylinder 1 is open at the upper end and closed at the lower end 3. The open ends of the cylinder 1 are all provided with internal threads. The cylinder 1 is filled with magnetorheological fluid.

[0076] The middle part of the top cover 2 is a through hole I201. The end surface of the lower end of the top cover 2 is provided with a circular boss II202. The top cover 2 is inserted into the inner wall of the upper end of the cylinder barrel 1. The top cover 2 and the cylinder barrel 1 are sealed by an O-ring.

[0077] See also Figure 3, the closed end 3 is cylindrical. The closed end 3 has a partition 301 inside, and the partition 301 divides the closed end 3, and a power device accommodating chamber is formed at the lower end of the partition 301. The middle part of the partition 301 has a through hole II3011. The upper surface of the partition 301 is evenly distributed with a plurality of limiting grooves 3012 in the circumferential direction. The bottom of the limiting groove 3012 is provided with a through hole III3013. The hole wall of the through hole II3011 is provided with a sealing groove 30111. The sealing groove 30111 is equipped with an O-ring to ensure sealing.

[0078] The outer wall of the upper end of the closed end 3 is provided with an external thread. The inner wall of the lower end of the cylinder 1 is provided with an internal thread, and the upper end of the closed end 3 is connected to the lower end of the cylinder 1 through a thread. The closed end 3 and the cylinder 1 are sealed by an O-ring.

[0079] The power device 4 is installed in the power device accommodating chamber, and its output end penetrates into the through hole II3011 of the partition 301. In this embodiment, the power device 4 is a rotating handle, and the output shaft of the rotating handle penetrates into the through hole II3011 of the partition 301.

[0080] See also Figure 4 , the electromagnetic component 5 is cylindrical, and its outer wall has an annular groove I501. An outer coil 502 is wound in the annular groove I501. The electromagnetic component 5 is located inside the cylinder 1. A plurality of bosses 503 are evenly distributed on the circumference of the lower end surface of the electromagnetic component 5, and each boss 503 is correspondingly inserted into a limiting groove 3012 of the partition 301. A through hole IV5031 is provided on the bottom surface of the boss 503. The through hole IV5031 is connected to the annular groove I501. The positive and negative leads of the outer coil 502 are inserted through the through hole IV5031, and are led out from the through hole III3013 of the partition 301 to connect to an external power supply. In this embodiment, the electromagnetic component 5 adopts a yoke.

[0081] See also Figure 5 The upper baffle plate 6 is disc-shaped, and has a circular hole 601 at the center of its upper end surface. Four through holes V602 are evenly distributed on the upper end surface of the upper baffle plate 6. The upper baffle plate 6 is fixed on the upper end surface of the electromagnetic assembly 5. A circular annular boss I603 is provided on the upper end surface of the upper baffle plate 6.

[0082] See also Figure 6 The rotor 7 is a cylinder, and the center of the end faces of both ends of the rotor 7 has a protruding shaft 701. The rotor 7 is located inside the electromagnetic assembly 5. The protruding shaft 701 at the lower end of the rotor 7 is inserted into the through hole II3011 of the partition 301 and is fixedly connected to the output shaft of the rotating handle through a coupling. The protruding shaft 701 at the upper end of the rotor 7 is inserted into the circular hole 601 of the upper baffle 6. The outer wall of the rotor 7 is processed with spiral ribs 702.

[0083] An inner channel is formed between the rotor 7 and the electromagnetic assembly 5. The inner channel is connected to the through hole V602 of the upper baffle 6. An outer channel is formed between the electromagnetic assembly 5 and the cylinder 1. The lower end of the electromagnetic assembly 5 is supported by the boss 503, and a space connecting the inner channel and the outer channel is formed below the electromagnetic assembly 5.

[0084] See also Figure 7 The working cylinder 8 is cylindrical, and its upper and lower ends are both open. The inner wall of the working cylinder 8 is evenly distributed with a plurality of flow grooves 801 and a plurality of through holes VI802 in the circumferential direction, wherein the flow grooves 801 are located below the through holes VI802. The position of the flow grooves 801 is recorded as the equilibrium position.

[0085] The working cylinder 8 is located in the cylinder barrel 1 and has a gap with the cylinder barrel 1. The lower end of the working cylinder 8 is sleeved on the annular boss I603 of the upper baffle 6, and the upper end of the working cylinder 8 is sleeved on the annular boss II202 of the top cover 2. The space between the outer wall of the working cylinder 8 and the inner wall of the cylinder barrel 1 is recorded as the flow cavity S1, and the space inside the working cylinder 8 is recorded as the inner cavity S.

[0086] The piston assembly 9 is located in the working cylinder 8 and has a gap between the piston assembly 9 and the working cylinder 8. A guide ring 901 is sleeved on the outer wall of the piston assembly 9 to play a guiding role.

[0087] The piston assembly 9 divides the inner cavity S, forming an upper oil cavity S2 above the piston assembly 9 and a lower oil cavity S3 below the piston assembly 9 .

[0088] The lower end of the piston rod 10 is mounted on the piston assembly 9 , and the upper end thereof passes through the through hole I201 of the top cover 2 .

[0089] The positioning member 11 is in the shape of a hollow disk. The outer wall of the positioning member 11 has threads. The positioning member 11 is connected to the open portion of the upper end of the cylinder barrel 1 through threads to press the upper baffle 6 tightly.

[0090] The cylinder barrel 1 and the working cylinder 8 are both filled with magnetorheological fluid.

[0091] The damper of this embodiment is suitable for artillery recoil, see Figure 8 In this embodiment, the equilibrium position of the piston assembly 9 is close to the bottom position of the working cylinder 8, that is, the position of the circulation groove 801 is close to the bottom of the working cylinder 8.

[0092] When the damper is at rest, the piston assembly 9 is in a balanced position. When the rotary handle is shaken, the rotary handle drives the rotor to rotate 7, and the spiral ribs 702 of the rotor 7 drive the magnetorheological fluid to generate a rotating flow in the inner channel. When the rotor 7 rotates, a pump effect is formed, causing the sedimentation magnetorheological fluid to circulate, forming a flushing effect and reducing sedimentation. The flow direction is related to the rotation direction of the spiral ribs 702. Forward flow: inner channel - circulation groove 801 - through hole VI802 - flow cavity S1 - outer channel - inner channel, and reverse flow is the opposite. Therefore, the rotary handle can be shaken regularly to reduce the sedimentation of the magnetorheological fluid of the damper when it is at rest.

[0093] During operation, the outer coil 502 is energized, and the electromagnetic component 5 forms a uniformly distributed magnetic field in the outer channel.

[0094] When the closed end 3 is pressurized, the piston rod 10 pushes the piston assembly 9 downward, and the piston assembly 9 leaves the equilibrium position. The magnetorheological fluid in the lower oil chamber S3 enters the flow chamber S1 through the inner channel and the outer channel, and flows into the upper oil chamber S2 through the through hole VI802 of the working cylinder 8.

[0095] When the piston rod 10 is restored, the magnetorheological fluid in the upper oil chamber S2 enters the flow chamber S1 through the through hole VI802 of the working cylinder 8, and flows into the lower oil chamber S3 of the working cylinder 8 through the outer channel and the inner channel.

[0096] The present embodiment discloses a magnetorheological damper with an external active dispersion device, which directly drives the rotor 7 to rotate by rotating the handle. Compared with installing a built-in motor at the bottom of the damper, it solves the problem of weakening the gap magnetic field due to the magnetorheological fluid filling the gap between the rotor and the stator. At the same time, the rotating handle is easy to drive and simple to control. When the damper is compressed, the external coil 502 is energized to generate a magnetic field in the outer channel. Due to the magnetorheological effect, the damping force generated by the flow is changed, thereby realizing a damper with controllable damping. The current size can be closed-loop controlled according to the motion state of the damper. Under the action of the controllable magnetic field, the magnetorheological fluid generates a large controllable damping force for vibration reduction. When the damper is stationary, the rotating handle is shaken to drive the rotor 7 to rotate, and the spiral ribs 702 of the rotor 7 drive the magnetorheological fluid to generate a rotating flow in the inner channel, so that the settled magnetorheological fluid can be redispersed, solving the sedimentation problem of the magnetorheological fluid.

[0097] Embodiment 3:

[0098] This embodiment discloses a relatively basic implementation method, a magnetorheological damper with an external active dispersion device, see Figure 1 and Figure 2 , including a cylinder 1, a power device 4, an electromagnetic component 5 and a rotor 7.

[0099] The cylinder 1 is open at the upper end and closed at the lower end 3. The open ends of the cylinder 1 are all provided with internal threads. The cylinder 1 is filled with magnetorheological fluid.

[0100] The power device 4 is located outside the cylinder 1 , and is connected to the closed end 3 of the cylinder 1 . The output end of the power device 4 penetrates into the closed end 3 of the cylinder 1 .

[0101] See also Figure 4 The electromagnetic assembly 5 is cylindrical, and its outer wall has an annular groove 1501. An outer coil 502 is wound in the annular groove 1501. The electromagnetic assembly 5 is located inside the cylinder 1.

[0102] See also Figure 6 The rotor 7 is a cylinder, and the center of the end faces of both ends of the rotor 7 has a protruding shaft 701. The rotor 7 is located inside the cylinder 1, and the protruding shaft 701 of the rotor 7 is inserted into the through hole II3011 of the partition 301, and is fixedly connected to the output end of the power device 4 through a coupling.

[0103] The power device 4 is driven, and the output end of the power device 4 drives the rotor to rotate 7, and the rotor 7 drives the magnetorheological fluid to generate a rotating flow in the cylinder 1. When the rotor 7 rotates, a pump effect is formed, so that the sedimentation magnetorheological fluid circulates, forming a flushing effect, reducing sedimentation, and the power device 4 can be driven regularly to reduce the sedimentation of the damper magnetorheological fluid when it is stationary.

[0104] During operation, the external coil 502 is energized and the electromagnetic component 5 forms a magnetic field.

[0105] The magnetorheological damper with an external active dispersion device disclosed in this embodiment directly drives the rotor 7 to rotate by driving the power device 4. Compared with installing a built-in motor at the bottom of the damper, it solves the problem of weakening the gap magnetic field due to the magnetorheological fluid filling the gap between the rotor and the stator. At the same time, the power device 4 is easy to drive and simple to control. When the damper is compressed, the magnetic field is generated by energizing the external coil 502, and the damping force generated by the flow is changed due to the magnetorheological effect, thereby realizing a damper with controllable damping. The current size can be closed-loop controlled according to the motion state of the damper. Under the action of the controllable magnetic field, the magnetorheological fluid generates a large controllable damping force for vibration reduction. When the damper is stationary, the power device 4 is driven to drive the rotor 7 to rotate, and the spiral ribs 702 of the rotor 7 drive the magnetorheological fluid to generate a rotating flow, so that the settled magnetorheological fluid can be redispersed, solving the sedimentation problem of the magnetorheological fluid.

[0106] Embodiment 4:

[0107] The main structure of this embodiment is the same as that of embodiment 3, and further includes a top cover 2, an upper baffle 6, a working cylinder 8, a piston assembly 9, a piston rod 10 and a positioning member 11.

[0108] The middle part of the top cover 2 is a through hole 1201. The top cover 2 is inserted into the inner wall of the upper end of the cylinder barrel 1. The top cover 2 and the cylinder barrel 1 are sealed by an O-ring.

[0109] The lower end of the electromagnetic assembly 5 is supported on the closed end 3. The rotor 7 is located inside the electromagnetic assembly 5, an inner channel is formed between the rotor 7 and the electromagnetic assembly 5, and an outer channel is formed between the electromagnetic assembly 5 and the cylinder 1.

[0110] See also Figure 5 The upper baffle plate 6 is disc-shaped and has a circular hole 601 at the center of its upper end surface. Four through holes V602 are evenly distributed on the upper end surface of the upper baffle plate 6. The upper baffle plate 6 is fixed to the upper end surface of the electromagnetic assembly 5. The through hole V602 is connected to the inner channel. A protruding shaft 701 is extended from the end surface of the rotor 7 away from the closed end 3, and the protruding shaft 701 is inserted into the circular hole 601 of the upper baffle plate 6.

[0111] See also Figure 7 The working cylinder 8 is cylindrical, and its upper and lower ends are both open. The inner wall of the working cylinder 8 is evenly distributed with a plurality of flow grooves 801 and a plurality of through holes VI802 in the circumferential direction, wherein the flow grooves 801 are located below the through holes VI802. The position of the flow grooves 801 is recorded as the equilibrium position.

[0112] The working cylinder 8 is located in the cylinder barrel 1 and has a gap with the cylinder barrel 1. The lower end of the working cylinder 8 is mounted on the upper end surface of the upper baffle 6, and the upper end of the working cylinder 8 is mounted on the lower end surface of the top cover 2. The space between the outer wall of the working cylinder 8 and the inner wall of the cylinder barrel 1 is recorded as the flow cavity S1, and the space inside the working cylinder 8 is recorded as the inner cavity S.

[0113] The piston assembly 9 is located in the working cylinder 8 and has a gap between the piston assembly 9 and the working cylinder 8. A guide ring 901 is sleeved on the outer wall of the piston assembly 9 to play a guiding role.

[0114] The piston assembly 9 divides the inner cavity S, forming an upper oil cavity S2 above the piston assembly 9 and a lower oil cavity S3 below the piston assembly 9 .

[0115] The lower end of the piston rod 10 is mounted on the piston assembly 9 , and the upper end thereof passes through the through hole I201 of the top cover 2 .

[0116] The positioning member 11 is in the shape of a hollow disk. The outer wall of the positioning member 11 has threads. The positioning member 11 is connected to the open portion of the upper end of the cylinder barrel 1 through threads to press the upper baffle 6 tightly.

[0117] When stationary, the piston assembly 9 is in a balanced position. When the power device 4 is driven, the power device 4 drives the rotor to rotate 7, and the rotor 7 drives the magnetorheological fluid to generate a rotating flow in the inner channel. When the rotor 7 rotates, a pump effect is formed, causing the sedimentation magnetorheological fluid to circulate, forming a flushing effect and reducing sedimentation. Therefore, the power device 4 can be driven regularly to reduce the sedimentation of the damper magnetorheological fluid when stationary.

[0118] During operation, the outer coil 502 is energized, and the electromagnetic component 5 forms a uniformly distributed magnetic field in the outer channel.

[0119] When the closed end 3 is pressurized, the piston rod 10 pushes the piston assembly 9 downward, and the piston assembly 9 leaves the equilibrium position. The magnetorheological fluid in the lower oil chamber S3 enters the flow chamber S1 through the inner channel and the outer channel, and flows into the upper oil chamber S2 through the through hole VI802 of the working cylinder 8.

[0120] When the piston rod 10 is restored, the magnetorheological fluid in the upper oil chamber S2 enters the flow chamber S1 through the through hole VI802 of the working cylinder 8, and flows into the lower oil chamber S3 of the working cylinder 8 through the outer channel and the inner channel.

[0121] Embodiment 5:

[0122] The main structure of this embodiment is the same as that of embodiment 4. Furthermore, a circular boss I603 is provided on the end surface of the upper end of the upper baffle 6. A circular boss II202 is provided on the end surface of the lower end of the top cover 2.

[0123] The lower end of the working cylinder 8 is sleeved on the annular boss I603, and the upper end of the working cylinder 8 is sleeved on the annular boss II202.

[0124] Embodiment 6:

[0125] The main structure of this embodiment is the same as that of Embodiment 3. Furthermore, the power device 4 is a motor, and the output shaft of the motor is inserted into the through hole II3011 of the partition 301.

[0126] Embodiment 7:

[0127] The main structure of this embodiment is the same as that of Embodiment 3. Furthermore, the power device 4 is a rotary handle, and the output shaft of the rotary handle is inserted into the through hole II3011 of the partition 301.

[0128] Embodiment 8:

[0129] The main structure of this embodiment is the same as that of embodiment 3. Figure 7 The closed end 3 is cylindrical. The closed end 3 has a partition 301 inside, and the partition 301 divides the closed end 3, and a power device accommodating chamber is formed at the lower end of the partition 301. The partition 301 has a through hole II3011 in the middle.

[0130] The upper end of the closed end 3 is inserted into the open end of the lower end of the cylinder 1. The closed end 3 and the cylinder 1 are sealed by an O-ring.

[0131] The power device 4 is installed in the power device accommodating chamber, and its output end penetrates into the through hole II3011 of the partition 301. The extended shaft 701 at the lower end of the rotor 7 penetrates into the through hole II3011 of the partition 301 and is fixedly connected to the output end of the power device 4 through a coupling.

[0132] The upper surface of the partition plate 301 is uniformly provided with a plurality of limiting grooves 3012 in the circumferential direction. The bottom of the limiting groove 3012 is provided with a through hole III 3013. The lower end of the electromagnetic assembly 5 is provided with a plurality of bosses 503, each of which is correspondingly inserted into a limiting groove 3012 of the partition plate 301.

[0133] Embodiment 9:

[0134] The main structure of this embodiment is the same as that of embodiment 8. Furthermore, a sealing groove 30111 is provided on the hole wall of the through hole II 3011. An O-type sealing ring is installed in the sealing groove 30111 to ensure sealing.

[0135] Embodiment 10:

[0136] The main structure of this embodiment is the same as that of embodiment 8. Furthermore, a through hole IV5031 is provided on the bottom surface of the boss 503. The through hole IV5031 is connected to the annular groove I501. The positive and negative leads of the outer coil 502 pass through the through hole IV5031, and are led out from the through hole III3013 of the partition 301 to connect to an external power source.

[0137] Embodiment 11:

[0138] The main structure of this embodiment is the same as that of Embodiment 3. Furthermore, the outer wall of the rotor 7 is provided with spiral ribs 702 or spiral blades. In this embodiment, the outer wall of the rotor 7 is processed with spiral blades.

[0139] Embodiment 12:

[0140] The main structure of this embodiment is the same as that of Embodiment 3. Furthermore, in this embodiment, the electromagnetic component 5 is a magnetic yoke.

Claims

1. A magnetorheological damper with an external active dispersion device, characterized in that: It comprises a cylinder barrel (1), a top cover (2), a power device (4), an electromagnetic assembly (5), an upper baffle (6), a rotor (7), a working cylinder (8), a piston assembly (9), a piston rod (10) and a positioning member (11); The upper end of the cylinder (1) is open, and the lower end is a closed end (3); the cylinder (1) is filled with magnetorheological fluid; the closed end (3) of the cylinder (1) is cylindrical; a partition (301) is provided inside the closed end (3), the partition (301) separates the closed end (3), and a power device accommodating chamber is formed at the lower end of the partition (301); a through hole II (3011) is provided in the middle of the partition (301); a plurality of limiting grooves (3012) are evenly distributed in the circumferential direction on the upper surface of the partition (301); a through hole III (3013) is provided on the bottom of the limiting groove (3012); The middle part of the top cover (2) is a through hole I (201); the top cover (2) is inserted into the inner wall of the upper end of the cylinder barrel (1); The power device (4) is a motor or a rotary handle; the power device (4) is installed in the power device accommodating chamber, and its output end penetrates into the through hole II (3011) of the partition (301); An outer coil (502) is wound around the electromagnetic assembly (5); the electromagnetic assembly (5) is located inside the cylinder (1); the lower end of the electromagnetic assembly (5) is supported on the closed end (3); a plurality of bosses (503) are extended from the lower end of the electromagnetic assembly (5), and each boss (503) is correspondingly inserted into a limiting groove (3012) of the partition (301); the rotor (7) is located inside the electromagnetic assembly (5), an inner channel is formed between the rotor (7) and the electromagnetic assembly (5), and an outer channel is formed between the electromagnetic assembly (5) and the cylinder (1); The upper baffle plate (6) is disc-shaped, and has a circular hole (601) at the center of its upper end surface; a plurality of through holes V (602) are evenly distributed upward on the upper circumference of the end surface of the upper baffle plate (6); the upper baffle plate (6) is fixed to the upper end surface of the electromagnetic assembly (5); the through hole V (602) of the upper baffle plate (6) is connected to the inner channel; a protruding shaft (701) is extended from the end surface of the rotor (7) away from the closed end (3), and the protruding shaft (701) is inserted into the circular hole (601) of the upper baffle plate (6); The rotor (7) is located in the cylinder (1); the protruding shaft (701) at the lower end of the rotor (7) penetrates into the through hole II (3011) of the partition (301) and is fixedly connected to the output end of the power device (4); The working cylinder (8) is cylindrical, and its upper and lower ends are both open; a plurality of flow grooves (801) and a plurality of through holes VI (802) are evenly distributed on the inner wall of the working cylinder (8) in the circumferential direction, wherein the flow groove (801) is located below the through hole VI (802); the position of the flow groove (801) is recorded as the equilibrium position; The working cylinder (8) is located in the cylinder barrel (1) and has a gap with the cylinder barrel (1); the lower end of the working cylinder (8) is mounted on the upper end surface of the upper baffle (6), and the upper end of the working cylinder (8) is mounted on the lower end surface of the top cover (2); the space between the outer wall of the working cylinder (8) and the inner wall of the cylinder barrel (1) is recorded as the flow cavity (S1), and the space inside the working cylinder (8) is recorded as the inner cavity (S); The piston assembly (9) is located in the working cylinder (8) and has a gap between the piston assembly (9) and the working cylinder (8); The piston assembly (9) divides the inner cavity (S), forming an upper oil cavity (S2) above the piston assembly (9) and a lower oil cavity (S3) below the piston assembly (9); The lower end of the piston rod (10) is mounted on the piston assembly (9), and the upper end thereof passes through the through hole I (201) of the top cover (2); The positioning member (11) is in the shape of a hollow disc; the positioning member (11) is inserted into the open portion of the upper end of the cylinder barrel (1) to press the upper baffle (6); When at rest, the piston assembly (9) is in a balanced position; When the closed end (3) is pressurized, the piston rod (10) pushes the piston assembly (9) to move downward, and the piston assembly (9) moves away from the equilibrium position; the magnetorheological fluid in the lower oil chamber (S3) enters the flow chamber (S1) through the inner channel and the outer channel, and flows into the upper oil chamber (S2) through the through hole VI (802) of the working cylinder (8); When the piston rod (10) is restored, the magnetorheological fluid in the upper oil chamber (S2) enters the flow chamber (S1) through the through hole VI (802) of the working cylinder (8), and flows into the lower oil chamber (S3) of the working cylinder (8) through the outer channel and the inner channel; The power device (4) is driven, and the output end of the power device (4) drives the rotor (7) to rotate, and the rotor (7) drives the magnetorheological fluid to generate a rotating flow in the cylinder (1).

2. A magnetorheological damper with an external active dispersion device according to claim 1, characterized in that: The upper end surface of the upper baffle plate (6) is provided with a circular boss I (603); the lower end surface of the top cover (2) is provided with a circular boss II (202); The lower end of the working cylinder (8) is sleeved on the annular boss I (603), and the upper end of the working cylinder (8) is sleeved on the annular boss II (202).

3. The magnetorheological damper with an external active dispersion device according to claim 1, characterized in that: A sealing groove (30111) is provided on the hole wall of the through hole II (3011); an O-type sealing ring is installed in the sealing groove (30111).

4. The magnetorheological damper with an external active dispersion device according to claim 1, characterized in that: A through hole IV (5031) is provided on the bottom surface of the boss (503); the through hole IV (5031) is connected to the annular groove I (501); the positive and negative leads of the external coil (502) pass through the through hole IV (5031), are led out from the through hole III (3013) of the partition (301), and are connected to an external power source.

5. The magnetorheological damper with an external active dispersion device according to claim 1, characterized in that: The outer wall of the rotor (7) is provided with spiral ribs (702) or spiral blades.

6. The magnetorheological damper with an external active dispersion device according to claim 1, characterized in that: The electromagnetic component (5) is a magnetic yoke.

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