Winding channel valve type magnetorheological damper
By designing a winding channel structure and dual-coil excitation in the magnetorheological damper, the problems of insufficient output damping force and adjustable range are solved, and the damper's efficient vibration reduction performance and compact structure are achieved, making it suitable for vibration reduction applications in multiple fields.
Patent Information
- Application Number
- CN202423282463.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing magnetorheological dampers have shortcomings in output damping force, dynamic adjustable range and structural compactness, which leads to their limitations in certain application areas.
A serpentine channel valve-type magnetorheological damper was designed. Two liquid flow channels were formed by machining circumferentially zigzag circular through holes in the coil winding frame and arc-shaped holes on the built-in valve cover to increase the effective damping channel length. A dual-coil excitation method was used to achieve two-stage adjustment of the damping force.
Without increasing the volume of the damper, the output damping force and adjustable range are improved. It has a compact structure and is suitable for vibration reduction and absorption systems in various fields.
Smart Images
Figure CN223483278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a meandering channel valve-type magnetorheological damper, belonging to the field of magnetorheological vibration reduction. Background Technology
[0002] Magnetorheological dampers, using magnetorheological fluid as the transmission medium, are a new type of intelligent damping device widely used in semi-active control systems. Their advantages, such as low energy consumption, relatively simple structure, fast response speed, and continuously adjustable damping force, make them excellent semi-active actuators for industrial applications. Currently, magnetorheological dampers have been widely used in system vibration reduction in many fields, including transportation, machinery, building bridges, and even aerospace.
[0003] With the continuous development of modern engineering, industrial products are becoming more integrated and intelligent. In certain application areas, magnetorheological dampers are required to provide a wider output damping force and adjustable range. Currently, the methods to improve the output damping force and adjustable range of magnetorheological dampers are to increase the number of turns of the excitation coil or extend the effective damping gap. This will lead to an increase in the volume of the piston head, which in turn increases the overall size of the magnetorheological damper, thus limiting the application scenarios of the damper.
[0004] Traditional valve-type magnetorheological dampers typically include a piston rod, an outer cylinder, an excitation coil, a magnetorheological fluid, and a piston. The piston contains a simple annular throttling gap. However, due to its simple structure and size limitations, it has shortcomings in terms of output damping force, dynamic adjustable range, and versatility, and cannot fully meet the vibration reduction requirements of engineering projects.
[0005] Therefore, it is necessary to design a valve-type magnetorheological damper with large output damping force, wide dynamic adjustable range, compact structure, and small size to solve the above-mentioned technical problems. Summary of the Invention
[0006] To overcome the problems of the magnetorheological dampers described in the background art, this utility model provides a meandering channel valve-type magnetorheological damper. The damper has two circumferentially distributed annular through holes machined in the coil winding frame, which together with the arc-shaped holes opened on the built-in valve cover form two fluid flow channels. The piston head structure design makes full use of the piston head volume, increases the effective damping channel length without increasing the damper volume, changes the direction of the magnetic field lines, and makes full use of the magnetic field.
[0007] The technical solution of this utility model is:
[0008] This utility model provides a meandering channel valve-type magnetorheological damper, including a piston rod 1, a damper left end cover 2, an outer sleeve 3, an internal valve left end cover 4, a coil winding frame 5, an excitation coil I 6, an excitation coil II 7, an internal valve right end cover 8, a damper right end cover 9, a wire channel 11, a magnetic isolation ring I 12, a magnetic isolation ring II 13, a magnetic isolation ring III 14, a magnetic isolation ring IV 15, a magnetic isolation ring V 16, a magnetic isolation ring VI 17, a magnetic isolation ring VII 18, and a magnetic isolation ring VI 18. Ring VIII 19; The piston rod 1 consists of two rods. The first piston rod 1 is connected to the left end cap 2 of the damper and extends into the outer sleeve 3, connecting to one end of the coil winding frame 5 located inside the outer sleeve 3. The second piston rod 1 is connected to the right end cap 9 of the damper and extends into the outer sleeve 3, connecting to the other end of the coil winding frame 5 located inside the outer sleeve 3. The left end cap 2 of the damper is fixedly connected to one end of the outer sleeve 3, and the right end cap 9 of the damper is fixedly connected to the other end of the outer sleeve 3. The left end cap 4 of the built-in valve is fixedly connected to one end of the coil winding frame 5, and the right end cap 8 of the built-in valve is fixedly connected to the other end of the coil winding frame 5. Two winding grooves are machined inside the coil winding frame 5. The excitation coil I6 and the excitation coil II7 are respectively wound in the two winding grooves of the coil winding frame 5. The wires of the excitation coil I6 and the excitation coil II7 are led out through the lead groove of the coil winding frame 5 and the wire channel 11 inside the first piston rod 1. Magnetic isolation ring I12 Magnetic isolation rings II13, III14, IV15, V16, VI17, VII18, and VIII19 are installed in the coil winding frame 5, so that the coil winding frame 5 forms annular through holes with zigzag distribution in the inner and outer circumferences. The annular through holes with zigzag distribution in the inner and outer circumferences are respectively arranged in a communication manner with the inner and outer array arc-shaped holes opened on the left end cover 4 of the built-in valve and the coil winding frame 5 to form two meandering liquid flow channels.
[0009] Further, the coil winding frame 5 includes a central disk 5-1, a middle portion 5-2 of the built-in valve, a portion 5-3 of the built-in valve near the sleeve, and a sleeve 5-4 of the built-in valve; one end of the central disk 5-1 is connected to the first piston rod 1, and the other end of the central disk 5-1 is connected to the second piston rod 1; a magnetic shielding ring V16 is embedded inside the middle portion of the central disk 5-1, and the middle portion 5-2 of the built-in valve is sleeved on the middle portion of the central disk 5-1; a magnetic shielding ring III14 is embedded on one side of the middle portion 5-2 of the built-in valve, and a magnetic shielding ring VI17 is embedded on the other side; magnetic shielding rings I12 and I14 are installed between the central disk 5-1 and one end of the middle portion 5-2 of the built-in valve in an inner-outer arrangement. Ring II13, with magnetic shielding rings VIII19 and VII18 arranged in an inner and outer manner between the central disc 5-1 and the other end of the middle part 5-2 of the built-in valve; the outer side of the central disc 5-1, the middle part 5-2 of the built-in valve, magnetic shielding ring II13, and magnetic shielding ring VII18 is equipped with the sleeve part 5-3 of the built-in valve. Magnetic shielding ring IV15 is installed in the groove in the middle of the sleeve part 5-3 of the built-in valve, and the two ends of the sleeve part 5-3 of the built-in valve are fixedly connected to the left end cover 4 and the right end cover 8 of the built-in valve, respectively. The outer side of the sleeve part 5-3 of the valve and the magnetic shielding ring IV15 is equipped with the sleeve 5-4 of the built-in valve, and the two ends of the sleeve part 5-3 of the valve are fixedly connected to the left end cover 4 and the right end cover 8 of the built-in valve, respectively.
[0010] Furthermore, the joints between the piston rod 1 and the left end cover 2 of the damper, the left end cover 2 of the damper and the outer sleeve 3, the piston rod 1 and the right end cover 9 of the damper, and the right end cover 9 of the damper and the outer sleeve 3 are sealed.
[0011] Furthermore, the left end cover 2, outer sleeve 3, coil winding frame 5, and right end cover 9 of the damper are made of high magnetic permeability steel, while the piston rod 1, left end cover 4 of the built-in valve, right end cover 8 of the built-in valve, magnetic isolation ring I12, magnetic isolation ring II13, magnetic isolation ring III14, magnetic isolation ring IV15, magnetic isolation ring V16, magnetic isolation ring VI17, magnetic isolation ring VII18, and magnetic isolation ring VIII19 are made of non-magnetic stainless steel.
[0012] The beneficial effects of the utility model are:
[0013] First, the magnetorheological fluid of this utility model patent flows through the piston head to form an axial annular fluid flow channel and a radial disc-shaped fluid flow channel. These two meandering fluid flow channels include ten axial annular fluid flow channels and eight radial disc-shaped fluid flow channels (the inner meandering fluid flow channel consists of seven axial annular fluid flow channels and six radial disc-shaped fluid flow channels). This structure can fully utilize the damping gap length, improve the magnetic field utilization rate, and ensure that magnetic lines of force pass perpendicularly through most of the fluid flow channels under the action of the magnetic isolation ring. It increases the length of the effective damping gap without increasing the volume of the damper, thereby improving the output damping force.
[0014] Secondly, this invention uses a dual-coil excitation method. Changing the direction of the input current of the two excitation coils can achieve two-stage adjustment of the output damping force, increasing the adjustable range of the damping force.
[0015] Third, the magnetorheological damper of this invention has a compact structure, small size, high magnetic field utilization, can generate a large output damping force, and has a wide adjustable range of damping force, making it particularly suitable for vibration reduction and absorption systems in various fields. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a side sectional view of the present invention;
[0018] Figure 3 This is a partial enlarged view of the coil winding frame of this utility model;
[0019] Figure 4 This is an exploded view of this utility model;
[0020] Figure 5 This is a schematic diagram of the left end cover structure of the built-in valve of this utility model;
[0021] Figure 6 This is a cross-sectional view of the right end cover of the damper of this utility model;
[0022] Figure 7 This is a diagram showing the assembly of the central disc, the middle part of the built-in valve, and the magnetic shielding ring III of this utility model.
[0023] Figure 8 This is a diagram showing the assembly of the central disc, the middle part of the built-in valve, the magnetic shielding ring I, the magnetic shielding ring III, and the magnetic shielding ring VII of this utility model.
[0024] Figure 9 This is a diagram showing the assembly of the central disc, the middle part of the built-in valve, the part of the built-in valve near the sleeve, and all the magnetic shielding rings of this utility model.
[0025] Figure 10 This is an overall schematic diagram of the built-in valve part of this utility model;
[0026] The labels in the diagram are as follows: 1. Piston rod; 2. Left end cap of damper; 3. Outer sleeve; 4. Left end cap of internal valve; 5. Coil winding frame; 5-1. Central disc; 5-2. Middle part of internal valve; 5-3. Part of internal valve near sleeve; 5-4. Internal valve sleeve; 6. Excitation coil I; 7. Excitation coil II; 8. Right end cap of internal valve; 9. Right end cap of damper; 10. O-ring seal; 11. Wire channel; 12. Magnetic isolation ring I; 13. Magnetic isolation ring II; 14. Magnetic isolation ring III; 15. Magnetic isolation ring IV; 16. Magnetic isolation ring V; 17. Magnetic isolation ring VI; 18. Magnetic isolation ring VII; 19. Magnetic isolation ring VIII. Detailed Implementation
[0027] The utility model will be further described below with reference to the accompanying drawings and embodiments, but the scope of the utility model is not limited to the description.
[0028] Example 1: Figures 1-10 As shown, a meandering channel valve-type magnetorheological damper includes a piston rod 1, a damper left end cover 2, an outer sleeve 3, an inner valve left end cover 4, a coil winding frame 5, an excitation coil I 6, an excitation coil II 7, an inner valve right end cover 8, a damper right end cover 9, a wire channel 11, a magnetic isolation ring I 12, a magnetic isolation ring II 13, a magnetic isolation ring III 14, a magnetic isolation ring IV 15, a magnetic isolation ring V 16, a magnetic isolation ring VI 17, a magnetic isolation ring VII 18, and a magnetic isolation ring VIII 1. 9; The piston rod 1 consists of two rods. The first piston rod 1 is connected to the left end cap 2 of the damper and extends into the outer sleeve 3, connecting to one end of the coil winding frame 5 located inside the outer sleeve 3. The second piston rod 1 is connected to the right end cap 9 of the damper and extends into the outer sleeve 3, connecting to the other end of the coil winding frame 5 located inside the outer sleeve 3. The left end cap 2 of the damper is fixedly connected to one end of the outer sleeve 3, and the right end cap 9 of the damper is fixedly connected to the other end of the outer sleeve 3. The left end cap 4 of the built-in valve is fixedly connected to one end of the coil winding frame 5, and the right end cap 8 of the built-in valve is fixedly connected to the other end of the coil winding frame 5. Two winding grooves are machined inside the coil winding frame 5. The excitation coil I6 and the excitation coil II7 are respectively wound in the two winding grooves of the coil winding frame 5. The wires of the excitation coil I6 and the excitation coil II7 are led out through the lead groove of the coil winding frame 5 and the wire channel 11 inside the first piston rod 1. Magnetic isolation ring I12, Magnetic isolation rings II13, III14, IV15, V16, VI17, VII18, and VIII19 are installed in the coil winding frame 5, so that the coil winding frame 5 forms annular through holes with zigzag distribution in the inner and outer circumferences. The annular through holes with zigzag distribution in the inner and outer circumferences are respectively arranged in a communication manner with the inner and outer array arc-shaped holes opened on the left end cover 4 of the built-in valve and the coil winding frame 5 to form two meandering liquid flow channels.
[0029] Further, the coil winding frame 5 includes a central disk 5-1, a middle portion 5-2 of the built-in valve, a portion 5-3 of the built-in valve near the sleeve, and a sleeve 5-4 of the built-in valve; one end of the central disk 5-1 is connected to the first piston rod 1, and the other end of the central disk 5-1 is connected to the second piston rod 1; a magnetic shielding ring V16 is embedded inside the middle portion of the central disk 5-1, and the middle portion 5-2 of the built-in valve is sleeved on the middle portion of the central disk 5-1; a magnetic shielding ring III14 is embedded on one side of the middle portion 5-2 of the built-in valve, and a magnetic shielding ring VI17 is embedded on the other side; magnetic shielding rings I12 and I14 are installed between the central disk 5-1 and one end of the middle portion 5-2 of the built-in valve in an inner-outer arrangement. Ring II13, with magnetic shielding rings VIII19 and VII18 arranged in an inner and outer manner between the central disc 5-1 and the other end of the middle part 5-2 of the built-in valve; the outer side of the central disc 5-1, the middle part 5-2 of the built-in valve, magnetic shielding ring II13, and magnetic shielding ring VII18 is equipped with the sleeve part 5-3 of the built-in valve. Magnetic shielding ring IV15 is installed in the groove in the middle of the sleeve part 5-3 of the built-in valve, and the two ends of the sleeve part 5-3 of the built-in valve are fixedly connected to the left end cover 4 and the right end cover 8 of the built-in valve, respectively. The outer side of the sleeve part 5-3 of the valve and the magnetic shielding ring IV15 is equipped with the sleeve 5-4 of the built-in valve, and the two ends of the sleeve part 5-3 of the valve are fixedly connected to the left end cover 4 and the right end cover 8 of the built-in valve, respectively.
[0030] Furthermore, the joints between the piston rod 1 and the left end cap 2 of the damper, the left end cap 2 of the damper and the outer sleeve 3, the piston rod 1 and the right end cap 9 of the damper, and the right end cap 9 of the damper and the outer sleeve 3 are sealed. For illustrative purposes, Figure 1 The image shows the O-ring 10 at the connection between piston rod 1 and the left end cover 2 of the damper, and between piston rod 1 and the right end cover 9 of the damper.
[0031] Furthermore, the damper left end cover 2, outer sleeve 3, coil winding frame 5, and damper right end cover 9 are made of high magnetic permeability steel (such as 10# steel), while the piston rod 1, built-in valve left end cover 4, built-in valve right end cover 8, magnetic isolation ring I12, magnetic isolation ring II13, magnetic isolation ring III14, magnetic isolation ring IV15, magnetic isolation ring V16, magnetic isolation ring VI17, magnetic isolation ring VII18, and magnetic isolation ring VIII19 are made of non-magnetic stainless steel.
[0032] The following description, in conjunction with the accompanying drawings, describes optional embodiments of the present invention:
[0033] like Figure 1The diagram shows the overall structure. The left end cover 2 of the damper has a circular through-hole machined in the middle. The first piston rod 1 and the inner surface of the circular through-hole of the left end cover 2 of the damper are fitted with a clearance fit and sealed by a sealing ring. The left end cover 2 of the damper is fixedly connected to the outer sleeve 3 by screws and sealed by a sealing ring. The inner surface of the left end cover 4 of the built-in valve has an internally threaded through-hole, and the outer surface of the first piston rod 1 has an external thread; the two are fixedly connected by threads. The coil winding frame 5 is installed inside the outer sleeve 3 with a sliding fit. The left end cover of the built-in valve... 4. The coil winding frame 5 is fixedly connected to the coil winding frame 5 by screws; the coil winding frame 5 has two winding slots, and the excitation coil I6 and excitation coil II7 are wound in the two winding slots of the coil winding frame 5 respectively; the coil winding frame 5 has two zigzag annular through holes; the wires of the excitation coil I6 and excitation coil II7 are led out through the lead wire slots of the coil winding frame 5 and the wire channel 11 of the piston rod 1; the right end cover 8 of the built-in valve is fixedly connected to the coil winding frame 5 by screws; the inner surface of the right end cover 8 of the built-in valve has an internal thread. The hole is fixedly connected to the second piston rod by threads; the right end cover 9 of the damper is fixedly connected to the outer sleeve 3 by screws and sealed by a sealing ring; a circular through hole is machined in the middle of the right end cover 9 of the damper, and the piston rod and the inner surface of the circular through hole of the right end cover 9 of the damper are clearance-fitted and sealed by an O-ring 10; magnetic isolation rings I12, II13, VII18, and VIII19 are fixedly connected to the central disk 5-1 and the middle part 5-2 of the built-in valve by screws; magnetic isolation rings III14 and VI1 7 is embedded in the middle part 5-2 of the built-in valve; the magnetic shielding ring IV15 is embedded in the part 5-3 of the built-in valve near the sleeve; the magnetic shielding ring V16 is embedded in the central disc 5-1; the left and right ends of the central disc 5-1 are machined with internal threaded through holes, and the first and second piston rods 1 are machined with external threads on their circumferences, and the two are fixedly connected by threads; the part 5-3 of the built-in valve near the sleeve is fixedly connected to the left end cover 4 and the right end cover 8 of the built-in valve by screws; the sleeve 5-4 of the built-in valve is welded together with the left end cover 4 and the right end cover 8 of the built-in valve.
[0034] Figure 2 The image shown is a side sectional view of this invention. Two circumferentially zigzag-distributed annular through-holes are machined within the coil winding frame 5; the magnetorheological fluid flows through these through-holes, forming two annular fluid flow channels. This increases the length of the effective damping gap without increasing the damper volume, thereby improving the output damping force.
[0035] Figure 3 The image shown is a partially enlarged view of the coil winding frame of this utility model. Figure 4The diagram shown is an exploded view of this utility model. The left end cover 4 of the built-in valve is fixedly connected to the coil winding frame 5 by screws; the coil winding frame 5 has two winding grooves, and the excitation coil I6 and excitation coil II7 are respectively wound in the two winding grooves of the coil winding frame 5; the coil winding frame 5 has two circumferentially distributed annular through holes; the wires of the excitation coil I6 and excitation coil II7 are led out through the lead wire groove of the coil winding frame 5 and the wire channel 11 of the piston rod 1; the right end cover 8 of the built-in valve is fixedly connected to the coil winding frame 5 by screws. Under the action of the magnetic shielding ring, the magnetic lines of force can be ensured to pass perpendicularly through most of the fluid flow channels. Without increasing the volume of the damper, the damping gap length is fully utilized, the magnetic field utilization rate is improved, and the output damping force is increased. Electromagnetic field simulations in Ansys Maxwell show that under a 1.0A current excitation, the magnetic induction intensity in most fluid channels can reach 0.5T. At this point, the shear yield strength of the magnetorheological fluid is close to saturation, reaching the maximum damping force of the magnetorheological damper. To ensure the reliability of the damping force, the relative piston velocity is set to 0.032 m / s. Calculations show that the damper can provide a viscous damping force of approximately 850 N and a Coulomb damping force of approximately 45000 N, with an adjustable factor of 54. The results indicate that this damper has a large output force, a reasonable structural design, and a good magnetic field distribution, making it valuable for engineering applications. By using a dual-coil excitation method, changing the direction of the input current to the two excitation coils allows for two-stage adjustment of the output damping force, increasing the adjustable range of the damping force.
[0036] Figure 5 The diagram shows the structure of the left end cover of the built-in valve of this utility model. The structure of the right end cover of the built-in valve is similar. Both the left end cover 4 and the right end cover 8 of the built-in valve have four arc-shaped outer holes and four arc-shaped inner holes, which, together with the two circumferentially distributed annular through holes machined inside the coil winding frame 5, form two meandering fluid flow channels, one inside and one outside. Further explanation of the left end cover 4 of the built-in valve is as follows: the center of the left end cover 4 of the built-in valve has an internally threaded through hole, and the right end of the piston rod 1 has an external thread, the two being fixedly connected by threads; the left end cover 4 of the built-in valve is fixedly connected to the coil winding frame 5 by screws.
[0037] Figure 6 The diagram shows the structure of the right end cover of the damper according to this utility model. A circular through hole is machined in the middle of the right end cover 9. The piston rod and the inner surface of the circular through hole of the right end cover 9 are fitted with a clearance fit, and sealed by an O-ring seal 10. When the piston rod reciprocates, the O-ring seal prevents the magnetorheological fluid from leaking out of the gaps in the device and also prevents foreign objects from entering the interior of the magnetorheological damper. Other sealing points operate on the same principle, such as: the right end cover 9 of the damper is fitted with the outer sleeve 3 with a clearance fit, and sealed by a sealing ring; the right end cover 9 of the damper and the outer sleeve 3 are fixedly connected by screws.
[0038] Figure 7 The diagram shows the assembly of the central disc, the middle part of the built-in valve, and the magnetic shielding ring III of this utility model. The magnetic shielding ring III 14 is embedded in the middle part 5-2 of the built-in valve, and the outer surface of the magnetic shielding ring III 14 is flush with the outer surface of the middle part 5-2 of the built-in valve; there is a 2mm gap between the middle part 5-2 of the built-in valve and the central disc 5-1 for the fluid flow channel; a wire channel 11 is provided inside the central disc 5-1.
[0039] Figure 8 The diagram shows the assembly of the central disc, the middle part of the built-in valve, the magnetic isolation ring I, the magnetic isolation ring III, and the magnetic isolation ring VII of this utility model. The left and right ends of the magnetic isolation ring I12 and the magnetic isolation ring II13 located on the outer periphery of the magnetic isolation ring I12 are connected to the central disc 5-1 and the middle part of the built-in valve 5-2 by screws; the left and right ends of the magnetic isolation ring VII18 and the magnetic isolation ring VIII19 located inside the magnetic isolation ring VII18 are connected to the central disc 5-1 and the middle part of the built-in valve 5-2 by screws; the empty space between the magnetic isolation rings I12 and II13 is the excitation coil I6; the empty space between the magnetic isolation rings VII18 and VIII19 is the excitation coil II7.
[0040] Figure 9 The diagram shows the assembly of the central disc, the middle part of the built-in valve, the part of the built-in valve near the sleeve, and all the magnetic shielding rings of this utility model. There is a 2mm fluid flow channel gap between the part of the built-in valve near the sleeve 5-3 and the central disc 5-1 and the middle part of the built-in valve 5-2; the magnetic shielding ring IV15 is fitted onto the groove of the part of the built-in valve near the sleeve 5-3, and the outer surface of the magnetic shielding ring IV15 is flush with the outer surface of the part of the built-in valve near the sleeve 5-3.
[0041] Figure 10 The diagram shows the overall structure of the built-in valve portion of this utility model. The built-in valve sleeve 5-4 is welded to the left end cover 4 and the right end cover 8 of the built-in valve. The left end cover 4 of the built-in valve is connected to the portion of the built-in valve near the sleeve 5-3 and the central disc 5-1 by screws. The right end cover 8 of the built-in valve is connected to the portion of the built-in valve near the sleeve 5-3 and the central disc 5-1 by screws.
[0042] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A meandering channel valve-type magnetorheological damper, characterized in that, Includes piston rod (1), damper left end cover (2), outer sleeve (3), built-in valve left end cover (4), coil winding frame (5), excitation coil I (6), excitation coil II (7), built-in valve right end cover (8), damper right end cover (9), wire channel (11), magnetic isolation ring I (12), magnetic isolation ring II (13), magnetic isolation ring III (14), magnetic isolation ring IV (15), magnetic isolation ring V (16), magnetic isolation ring VI (17), magnetic isolation ring VII (18), and magnetic isolation ring VIII (19); The piston rod (1) consists of two parts. The first piston rod (1) is connected to the left end cap (2) of the damper and extends into the outer sleeve (3) to connect with one end of the coil winding frame (5) located inside the outer sleeve (3). The second piston rod (1) is connected to the right end cap (9) of the damper and extends into the outer sleeve (3) to connect with the other end of the coil winding frame (5) located inside the outer sleeve (3). The left end cap (2) of the damper is fixedly connected to one end of the outer sleeve (3), and the right end cap (9) of the damper is fixedly connected to the other end of the outer sleeve (3). The left end cap (4) of the built-in valve is fixedly connected to one end of the coil winding frame (5), and the right end cap (8) of the built-in valve is fixedly connected to the other end of the coil winding frame (5). Two winding slots are machined inside the coil winding frame (5), and the excitation coil I (6) is connected to the excitation coil I I (7) is wound in the two winding slots of the coil winding frame (5) respectively. The wires of the excitation coil I (6) and the excitation coil II (7) are led out through the lead wire slot of the coil winding frame (5) and the wire channel (11) in the first piston rod (1). The magnetic isolation rings I (12), II (13), III (14), IV (15), V (16), VI (17), VII (18), and VIII (19) are installed in the coil winding frame (5) so that the coil winding frame (5) forms an annular through hole with a tortuous distribution in the inner and outer circumferences. The annular through holes with a tortuous distribution in the inner and outer circumferences are respectively arranged in a communication manner with the inner and outer array arc holes opened on the left end cover (4) of the built-in valve and the coil winding frame (5) to form two meandering liquid flow channels.
2. The meandering channel valve-type magnetorheological damper according to claim 1, characterized in that, The coil winding frame (5) includes a central disc (5-1), a middle part of the built-in valve (5-2), a part of the built-in valve near the sleeve (5-3), and a sleeve of the built-in valve (5-4); one end of the central disc (5-1) is connected to the first piston rod (1), and the other end of the central disc (5-1) is connected to the second piston rod (1); a magnetic shielding ring V (16) is embedded in the middle of the central disc (5-1), and a middle part of the built-in valve (5-2) is sleeved on the middle of the central disc (5-1). A magnetic shielding ring III (14) is embedded on one side of the middle part of the built-in valve (5-2), and a magnetic shielding ring VI (17) is embedded on the other side. Magnetic shielding rings I (12) and II are installed between the central disc (5-1) and one end of the middle part of the built-in valve (5-2) in an inner-outer arrangement. (13) A magnetic shielding ring VIII (19) and a magnetic shielding ring VII (18) are installed between the other end of the central disc (5-1) and the middle part of the built-in valve (5-2) in an inner-outer arrangement. The inner valve near the sleeve part (5-3) is installed on the outer side of the central disc (5-1), the middle part of the built-in valve (5-2), the magnetic shielding ring II (13), and the magnetic shielding ring VII (18). A magnetic shielding ring IV (15) is installed in the middle groove of the inner valve near the sleeve part (5-3), and the two ends of the inner valve near the sleeve part (5-3) are fixedly connected to the left end cover (4) and the right end cover (8) of the inner valve, respectively. The inner valve sleeve (5-4) is installed on the outer side of the valve near the sleeve part (5-3) and the magnetic shielding ring IV (15), and the two ends of the valve near the sleeve part (5-3) are fixed to the left end cover (4) and the right end cover (8) of the inner valve, respectively.
3. The meandering channel valve-type magnetorheological damper according to claim 1, characterized in that, The piston rod (1) and the left end cover (2) of the damper, the left end cover (2) of the damper and the outer sleeve (3), the piston rod (1) and the right end cover (9) of the damper, and the right end cover (9) of the damper and the outer sleeve (3) are sealed at the joints.
4. The meandering channel valve-type magnetorheological damper according to claim 1, characterized in that, The damper left end cover (2), outer sleeve (3), coil winding frame (5), and damper right end cover (9) are made of high magnetic permeability steel. The piston rod (1), built-in valve left end cover (4), built-in valve right end cover (8), magnetic isolation ring I (12), magnetic isolation ring II (13), magnetic isolation ring III (14), magnetic isolation ring IV (15), magnetic isolation ring V (16), magnetic isolation ring VI (17), magnetic isolation ring VII (18), and magnetic isolation ring VIII (19) are made of non-magnetic stainless steel.