CN109723750B - A magnetorheological damper piston assembly with settling active dispersion device - Google Patents

Abstract

The invention discloses a magnetorheological damper piston assembly with a settling active dispersion device, comprising a working cylinder, a piston rod and a piston assembly; the working cylinder is filled with magnetorheological fluid; the upper end of the piston rod penetrates into a Inside the working cylinder, an oil seal is provided at the part where the lower end penetrates the working cylinder; the piston assembly includes a rotor, a stator, a top cover and a bottom cover; the outer circumferential wall of the rotor is provided with spiral ribs; the rotor Loosely sleeved on the piston rod and located inside the working cylinder; the stator is sleeved on the rotor and located inside the working cylinder; a damping gap is formed between the stator and the rotor; the top cover is sleeved on the piston rod and located in the working cylinder The bottom cover is located in the working cylinder; the invention makes the magnetorheological fluid rotate and flow axially in the working cylinder through the damping gap through the rotation of the spiral ribs on the rotor, which not only realizes the after-settling of the magnetorheological fluid The redispersion of the MR damper also contributes to the energy recovery during normal operation of the MR damper.

Description

A magnetorheological damper piston assembly with settling active dispersion device

technical field

The invention relates to the field of magnetorheological dampers, in particular to a magnetorheological damper piston assembly with a settling active dispersion device.

Background technique

Magnetorheological fluid is a suspension composed of tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis mixed with non-magnetic liquid. The suspension exhibits low-viscosity Newtonian fluid properties under the condition of zero magnetic field; while under the action of a strong magnetic field, it exhibits Bingham body properties with high viscosity and low fluidity. In the case of zero magnetic field, the MR fluid behaves as a liquid with good flow performance, and its apparent viscosity is very small; under the action of a strong magnetic field, the apparent viscosity can increase by more than two orders of magnitude in a short time (millisecond level), and shows Solid-like properties; and this change is continuous and reversible, that is, it returns to its original state after removing the magnetic field. However, from the 1950s to the 1980s, the development of magnetorheological fluids has been very slow due to the failure to recognize its potential for shear stress and the existence of suspension stability problems.

The magnetorheological damper is a new type of damper based on the principle of modern double-acting cylinder damper and using magnetorheological fluid as the working medium. Since the magnetorheological damper can change the damping force under the control of an external magnetic field, valve components such as compression valve, circulation valve, recovery valve and compensation valve are no longer needed, so the structure is simple and the reliability is good. The advantages of high yield stress and fast response make magnetorheological dampers have bright prospects in engineering applications.

However, magnetorheological dampers have to face the inevitable problem of magnetorheological fluid settling. Since the magnetorheological fluid is composed of micron-sized soft magnetic particles and a carrier liquid, there is a density difference between them, and the Brownian motion of the micron-sized particles is weak and the gravitational effect is strong, so sedimentation in the carrier liquid is inevitable, although by adding surfactants Other methods can delay the settling problem of magnetorheological fluid to a certain extent, but cannot fundamentally overcome it.

The researchers went to great lengths to make the magnetorheological damper work without the problem of settlement. Most of the research work has focused on alleviating the settling problem of magnetorheological fluids and improving the suspension stability, and great progress has been made. However, even the magnetorheological fluid with the best suspension stability from LORD Company in the United States will appear layered sedimentation phenomenon visible to the naked eye after standing for about a month. Therefore, for a long time, people have hoped to find a reasonable method, which can exert a certain external force stirring effect on the static magnetorheological damper, so as to promote the redispersion of the magnetorheological fluid that has settled to a certain degree, so that the magnetorheological damper can be re-dispersed. keep in good shape. Unfortunately, due to the complexity of the mechanical structure and practical problems of engineering applications, this structure has not been effectively realized so far.

Therefore, there is a need in the prior art for a device that can overcome the above-mentioned problems.

SUMMARY OF THE INVENTION

The technical solution adopted to achieve the purpose of the present invention is as follows, a magnetorheological damper piston assembly with a settling active dispersion device, which is characterized in that it includes a working cylinder, a piston rod and a piston assembly.

The working cylinder is cylindrical. Several through-slots I and several through-holes I are evenly distributed in the circumferential direction of the working cylinder, wherein the through-slot I is located on the inner circular surface of the working cylinder, and its position is recorded as the balance position of the working cylinder. The working cylinder is filled with magnetorheological fluid.

The piston rod is a hollow cylinder. The inner wall of the upper end of the piston rod is machined with threads. The upper end of the piston rod penetrates into the interior of the working cylinder and can reciprocate in the interior of the working cylinder, and the lower end of the piston rod is provided with an oil seal at the part that penetrates the working cylinder.

The piston assembly includes a rotor, a stator, a top cover and a bottom cover.

The rotor is a hollow cylinder, and the center of the end faces at both ends of the rotor is provided with annular bosses. Squirrel cages are embedded on the end surfaces of both ends of the rotor. Spiral ribs are arranged on the outer circumferential wall of the rotor.

The rotor is loosely fitted on the piston rod and is located inside the working cylinder. The rotor is free to rotate within the working cylinder.

The stator includes an outer cylinder and an inner cylinder.

The inner cylinder is located inside the outer cylinder. Several magnetic poles are arranged between the inner cylinder and the outer cylinder. A winding is wound on each magnetic pole.

The stator covers the rotor and is located inside the working cylinder. A damping gap is formed between the stator and the rotor.

There is clearance fit between the outer cylinder of the stator and the inner wall of the working cylinder.

The top cover includes a ring I and a disk I. The disk I is located in the ring I. The center of the disc I is a countersunk hole I.

The disc I and the circular ring I are connected by the spokes I.

The top cover is sleeved on the piston rod and is located in the working cylinder, wherein the ring I of the top cover is in contact with the lower end of the stator. The annular boss at the lower end of the rotor is inserted into the countersunk hole I step of the top cover.

The bottom cover includes a ring II and a disk II. The disk II is located within the ring II. The center of the disc II is a countersunk hole II.

The disk II and the ring II are connected by the spokes II. The bottom cover is located in the working cylinder, wherein the ring II of the bottom cover is in contact with the upper end of the stator. The upper end of the piston rod is inserted into the step II of the countersunk head hole of the bottom cover and fastened by screws.

When the piston assembly is in an equilibrium position, the piston assembly is located in the middle section of the working cylinder.

When electrical excitation is applied to the windings, a rotating magnetic field is formed in the stator, and the squirrel cage of the rotor cuts the magnetic field lines to generate an induced current, which is acted by the magnetic force to drive the rotor to rotate.

When the rotor rotates, the helical ribs drive the magnetorheological fluid in the damping gap to make rotational flow and axial flow in the working cylinder through the damping gap. The magnetorheological fluid flows out through the through groove I and the through hole I of the working cylinder. When the piston assembly moves up and down from the equilibrium position, the magnetorheological fluid passing through the damping gap passes through the through hole I of the working cylinder. outflow.

Further, the rotor is made of soft magnetic material.

The stator is made by stacking silicon steel sheets.

Further, a plurality of through grooves II running through both ends of the inner cylinder are uniformly distributed on the inner wall of the inner cylinder. There is a through groove II on the inner wall of the inner cylinder corresponding to the two adjacent magnetic poles.

Further, the mating parts of the winding lead, the piston rod and the bottom cover are sealed with epoxy resin.

Further, several lead grooves I are opened on the end face of the upper end of the piston rod.

The spokes II are provided with several lead grooves II.

The lead groove I of the piston rod corresponds to the lead groove II of the bottom cover. The winding leads in the stator are led out from the lead slot II and the lead slot I, and pass through the inside of the piston rod and pass out from the lower end of the piston rod.

Further, the fitting part of the piston rod and the screw is sealed with epoxy resin.

Further, the range of the gap between the outer cylinder of the stator and the inner wall of the working cylinder is 1-2 mm.

The technical effect of the present invention is unquestionable. The present invention makes the magnetorheological fluid rotate and axially flow in the working cylinder through the damping gap through the rotation of the spiral ribs on the rotor, which not only realizes the magnetic rheological fluid after settling. Redispersion also contributes to energy recovery during normal operation of the MR damper.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the rotor of the present invention;

Fig. 3 is the structural schematic diagram of the stator of the present invention;

Fig. 4 is the structural representation of the working cylinder of the present invention;

Fig. 5 is the structural representation of the top cover of the present invention;

Fig. 6 is the structural schematic diagram of the bottom cover of the present invention;

FIG. 7 is a schematic structural diagram of the piston rod of the present invention.

In the figure: working cylinder 1, through slot I101, through hole I102, piston rod 2, lead slot I201, rotor 3, annular boss 301, squirrel cage 302, spiral ribs 303, stator 4, outer cylinder 401, inner cylinder 402, through slot II4021, magnetic pole 403, winding 404, winding lead 405, damping gap X, top cover 5, ring I501, disk I502, countersunk hole I5021, spoke I503, bottom cover 6, ring II601, disk II602, Counterbore II6021, Spoke II603 and Lead Slot II6031.

Detailed ways

The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of the present invention, various substitutions and changes can be made according to common technical knowledge and conventional means in the field, which shall be included in the protection scope of the present invention.

Example 1:

Referring to Fig. 1, a magnetorheological damper piston assembly with a settling active dispersion device is characterized in that it includes a working cylinder 1, a piston rod 2 and a piston assembly.

Referring to FIG. 4 , the working cylinder 1 is cylindrical. Several through-slots I101 and several through-holes I102 are evenly distributed in the circumferential direction of the working cylinder 1 , wherein the through-slots I101 are located on the inner circular surface of the working cylinder 1 , and its position is recorded as the balance position of the working cylinder 1 . The working cylinder 1 contains magnetorheological fluid.

Referring to FIG. 7 , the piston rod 2 is a hollow cylinder. The inner wall of the upper end of the piston rod 2 is processed with threads. Several lead grooves I201 are opened on the end face of the upper end of the piston rod 2 . The upper end of the piston rod 2 penetrates into the interior of the working cylinder 1, and can reciprocate in the interior of the working cylinder 1, and the lower end of the piston rod 2 penetrates the working cylinder 1. inner seal.

The piston assembly includes a rotor 3 , a stator 4 , a top cover 5 and a bottom cover 6 .

Referring to FIG. 2 , the rotor 3 is made of soft magnetic material, the rotor 3 is a hollow cylinder, and the center of the end faces at both ends of the rotor 3 is provided with annular bosses 301 . Squirrel cages 302 are embedded on the end surfaces of both ends of the rotor 3 . The outer circumferential wall of the rotor 3 is provided with helical ribs 303 .

The rotor 3 is loosely fitted on the piston rod 2 and is located inside the working cylinder 1 . The rotor 3 is free to rotate within the working cylinder 1 .

Referring to FIG. 3 , the stator 4 is made by stacking silicon steel sheets, and includes an outer cylinder 401 and an inner cylinder 402 .

The inner cylinder 402 is located inside the outer cylinder 401 . Several magnetic poles 403 are arranged between the inner cylinder 402 and the outer cylinder 401 . A winding 404 is wound on each magnetic pole 403 . In this embodiment, three pairs of six magnetic poles 403 are used.

The inner wall of the inner cylinder 402 is evenly distributed with six through grooves II4021 penetrating both ends of the inner cylinder 402 . There is a through slot II 4021 on the inner wall of the inner cylinder 402 corresponding to the two adjacent magnetic poles 403 , which is convenient for winding the winding 404 .

The stator 4 is sheathed on the rotor 3 and is located inside the working cylinder 1 . A damping gap X is formed between the stator 4 and the rotor 3 .

There is a gap between the outer cylinder 401 of the stator 4 and the inner wall of the working cylinder 1. It is worth noting that, as a part of the flow channel, the size of the gap is determined according to the damping force requirement. In this embodiment, the gap is 1 mm.

Referring to FIG. 5 , the top cover 5 includes a circular ring I501 and a circular disk I502. The disk I502 is located within the ring I501. The center of the disk I502 is a countersunk hole I5021.

The disk I502 and the ring I501 are connected by spokes I503.

The top cover 5 is sleeved on the piston rod 2 and is located in the working cylinder 1 , wherein the ring I501 of the top cover 5 is in contact with the lower end of the stator 4 . The annular boss 301 at the lower end of the rotor 3 is inserted into the step of the countersunk hole I5021 of the top cover 5 .

Referring to FIG. 6 , the bottom cover 6 includes a circular ring II601 and a circular disc II602. The disk II602 is located within the ring II601. The center of the disc II602 is a countersunk hole II6021.

The disk II602 and the ring II601 are connected by spokes II603. The spokes II603 are provided with a plurality of lead grooves II6031.

The bottom cover 6 is located in the working cylinder 1 , wherein the ring II601 of the bottom cover 6 is in contact with the upper end of the stator 4 . The upper end of the piston rod 2 is inserted into the step of the countersunk hole II6021 of the bottom cover 6 and fastened by screws 7 , wherein the lead groove I201 of the piston rod 2 corresponds to the lead groove II6031 of the bottom cover 6 . The winding leads 405 in the stator 4 are drawn out from the lead slot II6031 and the lead slot I201 , and pass through the inside of the piston rod 2 and pass out from the lower end of the piston rod 2 .

The fitting part of the piston rod 2 and the screw 7 is sealed with epoxy resin.

The mating parts of the winding lead 405 , the piston rod 2 and the bottom cover 6 are sealed with epoxy resin.

When the piston assembly is in the equilibrium position, the piston assembly is located in the middle section of the working cylinder 1 .

When electrical excitation is applied to the winding 404, alternating current excitation is used, a rotating magnetic field is formed in the stator 4, and the rotation speed of the magnetic field is determined by the alternating frequency of the applied electromagnetic excitation. Under the action of the rotating magnetic field, the squirrel cage of the rotor 3 302 cuts the magnetic line of force to generate an induced current and is acted by the magnetic force to drive the rotor 3 to rotate.

When the rotor 3 rotates, under the action of the helical ribs 303, the rotating rotor 3 drives the magnetorheological fluid in the damping gap X to rotate and flow in the working cylinder through the damping gap X. The combination of rotational flow and axial flow can effectively disperse the stratified or even settled magnetorheological fluid. When the piston assembly is in the equilibrium position, the magnetorheological fluid passing through the damping gap X passes through the flow of the working cylinder 1. The groove I101 and the through hole I102 flow out. When the piston assembly moves up and down from the equilibrium position, the magnetorheological fluid passing through the damping gap X flows out through the through hole I102 of the working cylinder 1 to form a flow loop, thereby achieving effective Magnetorheological fluid redispersion.

It should be noted that the rotation direction of the spiral ribs 303 needs to be determined according to the excitation sequence in the stator 4 .

When the piston assembly reciprocates up and down, the through groove I101 in the equilibrium position will reduce the damping force of the damper, and once the piston assembly leaves the equilibrium position, the damping force will be recovered. Since the vibration speed is large and the displacement is small in the equilibrium position, this This setting will help optimize the damping characteristics of the damper.

Example 2:

Referring to Fig. 1, a magnetorheological damper piston assembly with a settling active dispersion device is characterized in that it includes a working cylinder 1, a piston rod 2 and a piston assembly.

Referring to FIG. 4 , the working cylinder 1 is cylindrical. Several through-slots I101 and several through-holes I102 are evenly distributed in the circumferential direction of the working cylinder 1 , wherein the through-slots I101 are located on the inner circular surface of the working cylinder 1 , and its position is recorded as the balance position of the working cylinder 1 . The working cylinder 1 contains magnetorheological fluid.

Referring to FIG. 7 , the piston rod 2 is a hollow cylinder. The inner wall of the upper end of the piston rod 2 is processed with threads. Several lead grooves I201 are opened on the end face of the upper end of the piston rod 2 . The upper end of the piston rod 2 penetrates into the interior of the working cylinder 1, and can reciprocate in the interior of the working cylinder 1, and the lower end of the piston rod 2 penetrates the working cylinder 1. inner seal.

The piston assembly includes a rotor 3 , a stator 4 , a top cover 5 and a bottom cover 6 .

Referring to FIG. 2 , the rotor 3 is made of soft magnetic material, the rotor 3 is a hollow cylinder, and the center of the end faces at both ends of the rotor 3 is provided with annular bosses 301 . Squirrel cages 302 are embedded on the end surfaces of both ends of the rotor 3 . The outer circumferential wall of the rotor 3 is provided with helical ribs 303 .

The rotor 3 is loosely fitted on the piston rod 2 and is located inside the working cylinder 1 . The rotor 3 is free to rotate within the working cylinder 1 .

Referring to FIG. 3 , the stator 4 is made by stacking silicon steel sheets, and includes an outer cylinder 401 and an inner cylinder 402 .

The inner cylinder 402 is located inside the outer cylinder 401 . Several magnetic poles 403 are arranged between the inner cylinder 402 and the outer cylinder 401 . A winding 404 is wound on each magnetic pole 403 . In this embodiment, three pairs of six magnetic poles 403 are used.

The inner wall of the inner cylinder 402 is evenly distributed with six through grooves II4021 penetrating both ends of the inner cylinder 402 . There is a through slot II 4021 on the inner wall of the inner cylinder 402 corresponding to the two adjacent magnetic poles 403 , which is convenient for winding the winding 404 .

The stator 4 is sheathed on the rotor 3 and is located inside the working cylinder 1 . A damping gap X is formed between the stator 4 and the rotor 3 .

There is a gap between the outer cylinder 401 of the stator 4 and the inner wall of the working cylinder 1. It is worth noting that, as a part of the flow channel, the size of the gap is determined according to the damping force requirement. In this embodiment, the gap is 2mm.

Referring to FIG. 5 , the top cover 5 includes a circular ring I501 and a circular disk I502. The disk I502 is located within the ring I501. The center of the disk I502 is a countersunk hole I5021.

The disk I502 and the ring I501 are connected by spokes I503.

The top cover 5 is sleeved on the piston rod 2 and is located in the working cylinder 1 , wherein the ring I501 of the top cover 5 is in contact with the lower end of the stator 4 . The annular boss 301 at the lower end of the rotor 3 is inserted into the step of the countersunk hole I5021 of the top cover 5 .

Referring to FIG. 6 , the bottom cover 6 includes a circular ring II601 and a circular disc II602. The disk II602 is located within the ring II601. The center of the disc II602 is a countersunk hole II6021.

The disk II602 and the ring II601 are connected by spokes II603. The spokes II603 are provided with a plurality of lead grooves II6031.

The bottom cover 6 is located in the working cylinder 1 , wherein the ring II601 of the bottom cover 6 is in contact with the upper end of the stator 4 . The upper end of the piston rod 2 is inserted into the step of the countersunk hole II6021 of the bottom cover 6 and fastened by screws 7 , wherein the lead groove I201 of the piston rod 2 corresponds to the lead groove II6031 of the bottom cover 6 . The winding leads 405 in the stator 4 are drawn out from the lead slot II6031 and the lead slot I201 , and pass through the inside of the piston rod 2 and pass out from the lower end of the piston rod 2 .

The fitting part of the piston rod 2 and the screw 7 is sealed with epoxy resin.

The mating parts of the winding lead 405 , the piston rod 2 and the bottom cover 6 are sealed with epoxy resin.

When the piston assembly is in the equilibrium position, the piston assembly is located in the middle section of the working cylinder 1 .

When electrical excitation is applied to the winding 404, alternating current excitation is used, a rotating magnetic field is formed in the stator 4, and the rotation speed of the magnetic field is determined by the alternating frequency of the applied electromagnetic excitation. Under the action of the rotating magnetic field, the squirrel cage of the rotor 3 302 cuts the magnetic line of force to generate an induced current and is acted by the magnetic force to drive the rotor 3 to rotate.

When the rotor 3 rotates, under the action of the helical ribs 303, the rotating rotor 3 drives the magnetorheological fluid in the damping gap X to rotate and flow in the working cylinder through the damping gap X. The combination of rotational flow and axial flow can effectively disperse the stratified or even settled magnetorheological fluid. When the piston assembly is in the equilibrium position, the magnetorheological fluid passing through the damping gap X passes through the flow of the working cylinder 1. The groove I101 and the through hole I102 flow out. When the piston assembly moves up and down from the equilibrium position, the magnetorheological fluid passing through the damping gap X flows out through the through hole I102 of the working cylinder 1 to form a flow loop, thereby achieving effective magnetorheological fluid redispersion.

It should be noted that the rotation direction of the spiral ribs 303 needs to be determined according to the excitation sequence in the stator 4 .

When the piston assembly reciprocates up and down, the through groove I101 in the equilibrium position will reduce the damping force of the damper, and once the piston assembly leaves the equilibrium position, the damping force will be recovered. Since the vibration speed is large and the displacement is small in the equilibrium position, this This setting will help optimize the damping characteristics of the damper.

Claims (7)

1. The utility model provides a magnetorheological damper piston assembly of initiative dispersion devices is subsided in area which characterized in that: comprises a working cylinder (1), a piston rod (2) and a piston assembly;

the working cylinder (1) is cylindrical; a plurality of through grooves I (101) and a plurality of through holes I (102) are uniformly distributed in the circumferential direction of the working cylinder (1), wherein the through grooves I (101) are positioned on the inner circular surface of the working cylinder (1), and the positions of the through grooves I (101) are marked as the balance position of the working cylinder (1); magnetorheological fluid is filled in the working cylinder (1);

the piston rod (2) is a hollow cylinder; the inner wall of the upper end of the piston rod (2) is processed with threads; a plurality of lead grooves I (201) are formed in the end face of the upper end of the piston rod (2); the upper end of the piston rod (2) penetrates into the working cylinder (1) and can reciprocate in the working cylinder (1), and an oil seal is arranged at the part of the lower end of the piston rod, which penetrates out of the working cylinder (1);

the piston assembly comprises a rotor (3), a stator (4), a top cover (5) and a bottom cover (6);

the rotor (3) is a hollow cylinder, and the centers of the end surfaces of two ends of the rotor are provided with circular bosses (301); squirrel cages (302) are embedded into the end faces of the two ends of the rotor (3); the outer circumferential wall of the rotor (3) is provided with a spiral rib (303);

the rotor (3) is loosely sleeved on the piston rod (2) and is positioned inside the working cylinder (1); the rotor (3) can rotate freely in the working cylinder (1);

the stator (4) comprises an outer cylinder (401) and an inner cylinder (402);

the inner barrel (402) is positioned inside the outer barrel (401); a plurality of magnetic poles (403) are arranged between the inner cylinder (402) and the outer cylinder (401); a winding (404) is wound on each magnetic pole (403);

the stator (4) is sleeved on the rotor (3) and is positioned inside the working cylinder (1); a damping gap (X) is formed between the stator (4) and the rotor (3);

a gap is reserved between the outer cylinder (401) of the stator (4) and the inner wall of the working cylinder (1);

the top cover (5) comprises a circular ring I (501) and a circular disc I (502); the disc I (502) is positioned in the circular ring I (501); the center of the disc I (502) is a counter bore I (5021);

the disc I (502) is connected with the ring I (501) through spokes I (503);

the top cover (5) is sleeved on the piston rod (2) and is positioned in the working cylinder (1), wherein a circular ring I (501) of the top cover (5) is in contact with the lower end of the stator (4); a circular boss (301) at the lower end of the rotor (3) is inserted into a step of a counter bore I (5021) of the top cover (5);

the bottom cover (6) comprises a circular ring II (601) and a circular disc II (602); the disc II (602) is positioned in the circular ring II (601); the center of the disc II (602) is provided with a counter bore II (6021);

the disc II (602) is connected with the circular ring II (601) through spokes II (603);

the bottom cover (6) is positioned in the working cylinder (1), wherein a circular ring II (601) of the bottom cover (6) is in contact with the upper end of the stator (4); the upper end of the piston rod (2) is inserted into a step of a counter bore II (6021) of the bottom cover (6) and is fastened through a screw (7);

when the winding (404) is electrically excited, a rotating magnetic field is formed in the stator (4), the squirrel cage (302) of the rotor (3) cuts magnetic lines of force to generate induced current, and the induced current is acted by magnetic force to drive the rotor (3) to rotate;

when the rotor (3) rotates, the spiral rib (303) drives magnetorheological fluid in the damping gap (X) to flow in a rotating mode and an axial mode in the working cylinder (1) through the damping gap (X), when the piston assembly is located at the balance position, the magnetorheological fluid passing through the damping gap (X) flows out through the through groove I (101) and the through hole I (102) of the working cylinder (1), and when the piston assembly is separated from the balance position to do up-and-down reciprocating motion, the magnetorheological fluid passing through the damping gap (X) flows out through the through hole I (102) of the working cylinder (1).

2. The magnetorheological damper piston assembly with an active settling dispersion device of claim 1, wherein: the rotor (3) is made of soft magnetic material;

the stator (4) is made of silicon steel sheets in an overlapping mode.

3. The magnetorheological damper piston assembly with an active settling dispersion device of claim 1, wherein: a plurality of through grooves II (4021) penetrating through two ends of the inner cylinder (402) are uniformly distributed on the inner wall of the inner cylinder (402); and the inner wall of the inner barrel (402) corresponding to two adjacent magnetic poles (403) is provided with a through groove II (4021).

4. The magnetorheological damper piston assembly with an active settling dispersion device of claim 1, wherein: and the matching part of the piston rod (2) and the screw (7) is sealed by epoxy resin.

5. The magnetorheological damper piston assembly with an active settling dispersion device of claim 1, wherein: a plurality of lead grooves I (201) are formed in the end face of the upper end of the piston rod (2);

a plurality of lead wire grooves II (6031) are formed in the spoke II (603);

the lead wire groove I (201) of the piston rod (2) corresponds to the lead wire groove II (6031) of the bottom cover (6); and a winding lead (405) in the stator (4) is led out from the lead groove II (6031) and the lead groove I (201) and penetrates out from the lower end of the piston rod (2) through the inside of the piston rod (2).

6. The magnetorheological damper piston assembly with an active settling dispersion device of claim 5, wherein: and the matching parts of the winding lead (405), the piston rod (2) and the bottom cover (6) are sealed by epoxy resin.

7. The magnetorheological damper piston assembly with an active settling dispersion device of claim 1, wherein: the clearance range between the outer cylinder (401) of the stator (4) and the inner wall of the working cylinder (1) is 1-2 mm.

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