Parallel coil and multi-channel shunt damping magnetorheological valve

Abstract

The magneto-rheological valve comprises a valve element assembly, the valve element assembly comprises an upper valve structure and a lower valve structure, when a first magnet exciting coil and a second magnet exciting coil are not powered on, surface sealing is formed by a valve element and a second magnetism isolating ring under the action of a spring, and the valve element assembly is located at the normal closed position; when the first magnet exciting coil and the second magnet exciting coil are powered on, the valve element is driven by the second magnet exciting coil to move upwards, and an adjustable damping gap is formed between the valve element and the second magnetism isolating ring. The magnet exciting coil on the upper portion of the valve element assembly drives the valve element to move, and then the runner gap is adjusted; more sections of damping gaps are formed in the inner space of the lower part of the valve element assembly, so that a magnetic field can be fully utilized, and larger pressure drop can be output. Meanwhile, the dynamic viscosity of the magnetorheological fluid can be changed through driving of the magnet exciting coil, so that the resistance of the magnetorheological fluid flowing through the interior of the valve body is changed, and the purpose of adjusting the output pressure drop of the valve is achieved.

Description

Technical Field

[0001] The present invention relates to a magnetorheological valve, and specifically to a magnetorheological valve with parallel coils and multi-channel shunt damping. Background Art

[0002] A magnetorheological valve is an intelligent fluid control device based on magnetorheological fluid. The magnetorheological fluid can rapidly change its flow performance under the action of an external magnetic field, and the flow resistance of the fluid can be precisely controlled by adjusting the magnetic field intensity. Therefore, the magnetorheological valve has significant advantages in fields that require rapid response and high-precision control (such as hydraulic systems, active vibration damping, etc.).

[0003] However, traditional magnetorheological valves usually adopt a single-channel design and have the following defects: (1) Insufficient control ability: The single-channel structure is difficult to meet the complex multi-condition fluid control requirements.

[0004] (2) Uneven magnetic force distribution: The magnetic force density distribution of the magnetorheological fluid in the magnetic field is uneven, which easily leads to fluctuations in fluid resistance and affects control stability. Summary of the Invention

[0005] The purpose of the present invention is to provide a magnetorheological valve with parallel coils and multi-channel shunt damping. By having multiple coils work in parallel, the power consumption of a single coil is reduced, and at the same time, the magnetic field uniformity and intensity are enhanced, thereby improving the response characteristics of the magnetorheological fluid in the valve; introducing a multi-channel shunt damping structure, the fluid flow path is dispersed into multiple channels, and by adjusting the damping characteristics of each channel, precise control of the fluid is achieved, ensuring flow uniformity.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A magnetorheological valve with parallel coils and multi-channel shunt damping, including a spool assembly, and the spool assembly includes: An upper valve structure, including a spool. A top positioning disk is provided above the spool, a spring is installed between the spool and the top positioning disk, the bottom of the spool is connected to a second magnetic isolation ring, the lower end of the spool is sleeved with an upper positioning disk, the upper positioning disk is connected to the second magnetic isolation ring, a winding frame is sleeved between the top positioning disk and the upper positioning disk, a second excitation coil is wound on the winding frame, a first magnetic conduction ring is sleeved outside the top positioning disk, the winding frame, the second excitation coil and the upper positioning disk. A plurality of damping protrusions are provided on the outside of the spool, and a plurality of damping gaps are formed between the spool and the top positioning disk and the upper positioning disk through the damping protrusions. Through holes are opened in the centers of both the top positioning disk and the second magnetic isolation ring; Lower valve structure, including a flow guiding assembly. Above the flow guiding assembly, there is an intermediate positioning disk. The top of the intermediate positioning disk is connected to the bottom of the second magnetic isolation ring. Below the flow guiding assembly, a lower positioning disk is installed. A first magnetic isolation ring is sleeved between the intermediate positioning disk and the lower positioning disk. A first exciting coil is wound around the first magnetic isolation ring. The outer sides of the intermediate positioning disk, the first exciting coil, and the lower positioning disk are sleeved with a second magnetic conducting ring. The flow guiding assembly includes a first flow guiding ring, a flow guiding disk, and a second flow guiding ring. A plurality of damping protrusions are provided on the first flow guiding ring, the flow guiding disk, and the second flow guiding ring. The flow guiding assembly forms a plurality of damping gaps between the flow guiding assemblies and with the intermediate positioning disk, the first magnetic isolation ring, and the lower positioning disk through the damping protrusions. Through holes are opened at the centers of the intermediate positioning disk, the flow guiding disk, and the lower positioning disk. The through hole of the intermediate positioning disk and the through hole of the second magnetic isolation ring cooperate to form a flow channel. When the first and second exciting coils are not energized, under the action of the spring, the valve core forms a surface seal with the second magnetic isolation ring, and the valve core assembly is in the normal closed position. When the first and second exciting coils are energized, the valve core moves upward under the drive of the second exciting coil, forming an adjustable damping gap with the second magnetic isolation ring.

[0007] As an improvement, the top positioning disk includes a positioning disk and a circular ring protrusion located at the lower end of the positioning disk. A through hole is provided at the center of the positioning disk. The circular ring protrusion is concentric with the positioning disk. A hole for placing the valve core is provided inside the circular ring protrusion, and the hole communicates with the through hole at the center of the positioning disk. The valve core includes a valve core disk and a cylindrical protrusion located at the upper end of the valve core disk. The upper end of the cylindrical protrusion is located inside the hole of the circular ring protrusion. A spring hole is provided at the center of the top of the cylindrical protrusion. A spring is installed in the spring hole, and the upper end of the spring contacts the positioning disk.

[0008] As an improvement, damping protrusions are provided on the left and right sides of the upper end of the cylindrical protrusion and on the left and right sides of the valve core disk. The damping protrusions on both sides of the cylindrical protrusion contact the inner wall of the circular ring protrusion in the top positioning disk to form a damping gap, and the damping protrusions on both sides of the valve core disk contact the inner wall of the upper positioning disk to form a damping gap.

[0009] As an improvement, the outer diameter of the second magnetic isolation ring is the same as the outer diameter of the first magnetic conducting ring. A circular groove is opened at the upper end of the second magnetic isolation ring, and the diameter of the circular groove is the same as the inner diameter of the upper positioning disk.

[0010] As an improvement, both the intermediate positioning disk and the lower positioning disk include a positioning disk and a positioning boss located on one side of the positioning disk. The positioning disk and the positioning boss are concentrically arranged. A through hole that is integrally formed is provided on the positioning disk and the positioning boss. The diameters of the two positioning disks are the same and are the same as the inner diameter of the second magnetic conducting ring. The outer diameter of the second magnetic conducting ring is the same as the outer diameter of the second magnetic isolation ring. The positioning boss is used for the positioning and installation of the first magnetic isolation ring.

[0011] As an improvement, damping protrusions are provided at the upper end and the left and right sides of the first flow guiding ring, and damping gaps are formed between the first flow guiding ring and the intermediate positioning disc and the first magnetic isolation ring through the damping protrusions; Damping protrusions are provided at the upper end and the lower end of the flow guiding disc, and damping gaps are formed between the flow guiding disc and the first flow guiding ring and the second flow guiding ring through the damping protrusions; Damping protrusions are provided at the lower end and the left and right sides of the second flow guiding ring, and damping gaps are formed between the second flow guiding ring and the first magnetic isolation ring and the lower positioning disc through the damping protrusions.

[0012] As an improvement, the damping protrusions are cylindrical.

[0013] As an improvement, a valve body assembly is further included, and the valve body assembly includes an upper valve body and a lower valve body, and a plurality of the spool assemblies are installed in parallel between the upper valve body and the lower valve body.

[0014] As an improvement, three of the spool assemblies are installed in parallel between the upper valve body and the lower valve body, each spool assembly is inlaid between the upper valve body and the lower valve body, the upper valve body and the lower valve body are connected by compression bolts, and sealing rings are installed between each spool assembly and the upper valve body and the lower valve body. A third magnetic isolation ring is installed in the circumferential direction between the upper valve body and the lower valve body of the middle spool assembly to prevent the excitation coils of each spool assembly from interfering with each other.

[0015] As an improvement, the upper valve body is provided with a liquid inlet, and the lower valve body is provided with a liquid outlet. The liquid inlet is communicated with the through holes on the top positioning disc in each of the parallel spool assemblies, and the liquid outlet is communicated with the through holes on the lower positioning disc; The magnetorheological fluid enters each spool assembly from the liquid inlet, passes through the damping gaps in each spool assembly, and finally returns to the liquid outlet.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the present invention, the spool is driven to move by the excitation coil in the upper part of the spool assembly, thereby adjusting the flow channel gap; more damping gaps are formed in the internal space in the lower part of the spool assembly, which helps to make full use of the magnetic field and output a larger pressure drop. At the same time, the drive of the excitation coil can change the dynamic viscosity of the magnetorheological fluid, thereby changing the resistance of the magnetorheological fluid flowing through the valve body, and achieving the purpose of adjusting the output pressure drop of the valve.

[0017] In terms of structural design, the entire magnetorheological valve is formed by paralleling three spool assemblies. In the upper valve structures of the three spool assemblies, the spools are controlled by their respective exciting coils, thereby precisely adjusting the damping gaps of the three flow channels respectively. The independent exciting coil and spool design can improve the response speed of the system. The spool controlled by each exciting coil can quickly adjust the damping of the corresponding flow channel without waiting for the adjustment of other flow channels to be completed, and can adjust the flow rates of different flow channels under different working conditions. The independently controlled design enables the system to more flexibly adapt to various working conditions. If one of the exciting coils or spools fails, the other exciting coils and spools can still continue to work, thus not completely losing the control ability. This redundant design helps to improve the reliability and safety of the system. The exciting coil is installed between the winding frame and the magnetic isolation ring and does not directly contact the magnetorheological fluid, which helps to extend the service life of the coil and simplifies the processing of the lead holes. In addition, the adoption of the independent exciting coil and spool design brings about performance improvements in many aspects. Firstly, it can greatly improve the response speed of the system. The spool controlled by each coil can quickly adjust the damping of the corresponding flow channel without waiting for the adjustment of other flow channels to be completed. Secondly, it can flexibly adjust the flow rates of different flow channels under different working conditions, enabling the system to adapt to various complex working conditions. Thirdly, this design has a redundant feature. If one of the coils or spools fails, the other coils and spools can still continue to work, avoiding the failure of the entire system due to a single-point failure. For example, in complex working conditions, if a certain spool or coil suddenly fails, the other two spool assemblies can still maintain the basic functions of the system. This redundant design significantly improves the reliability and safety of the system. Brief Description of the Drawings

[0019] Figure 1 is a schematic cross-sectional view of the normal position of the spool assembly of the present invention; Figure 2 is a cross-sectional view and a magnetic field line schematic diagram of the working position of the spool assembly of the present invention; Figure 3 is an exploded view of the structure of the spool assembly of the present invention; Figure 4 is a schematic cross-sectional view of the normal position of the magnetorheological valve of the present invention; Figure 5 is a cross-sectional view and a flow channel schematic diagram of the working position of the magnetorheological valve of the present invention; Figure 6 is a three-dimensional structure schematic diagram of the magnetorheological valve of the present invention; In the figure: 1. Top positioning disc; 2. Winding frame; 3. Second excitation coil; 4. Second magnetic isolation ring; 5. Intermediate positioning disc; 6. Flow guiding disc; 7. Second flow guiding ring; 8. Lower positioning disc; 9. First magnetic conduction ring; 10. Spring; 11. Spool; 12. Upper positioning disc; 13. First flow guiding ring; 14. First magnetic isolation ring; 15. First excitation coil; 16. Second magnetic conduction ring; 17. Second sealing ring; 18. Third magnetic isolation ring; 19. First sealing ring; 20. Upper valve body; 21. Lower valve body; 22. Compression bolt; 23. Liquid inlet; 24. Liquid outlet; Ⅰ. First spool assembly; Ⅱ. Second spool assembly; Ⅲ. Third spool assembly. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0021] Embodiment 1: As Figure 1 , Figure 2 and Figure 3 shown, a magnetorheological valve with parallel coils and multi-channel shunt damping includes a spool assembly, and the spool assembly includes an upper valve structure and a lower valve structure; The upper valve structure includes a spool 11. A top positioning disc 1 is provided above the spool 11. A spring 10 is installed between the spool 11 and the top positioning disc 1. The bottom of the spool 11 is connected to the second magnetic isolation ring 4. The lower end of the spool 11 is sleeved with an upper positioning disc 12, and the upper positioning disc 12 is connected to the second magnetic isolation ring 4. A winding frame 2 is sleeved between the top positioning disc 1 and the upper positioning disc 12, and a second excitation coil 3 is wound on the winding frame 2. A first magnetic conduction ring 9 is sleeved outside the top positioning disc 1, the winding frame 2, the second excitation coil 3 and the upper positioning disc 12. A plurality of damping protrusions are provided on the outside of the spool 11, and a plurality of damping gaps are formed between the spool 11 and the top positioning disc 1 and the upper positioning disc 12 through the damping protrusions. Through holes for communicating the damping gaps are opened at the centers of the top positioning disc 1 and the second magnetic isolation ring 4; The lower valve structure includes a flow guiding assembly. Above the flow guiding assembly, there is an intermediate positioning disk 5. The top of the intermediate positioning disk 5 is connected to the bottom of the second magnetic isolation ring 4. Below the flow guiding assembly, a lower positioning disk 8 is installed. A first magnetic isolation ring 14 is sleeved between the intermediate positioning disk 5 and the lower positioning disk 8. A first exciting coil 15 is wound around the first magnetic isolation ring 14. The outer sides of the intermediate positioning disk 5, the first exciting coil 15, and the lower positioning disk 8 are sleeved with a second magnetic conduction ring 16. The flow guiding assembly includes a first flow guiding ring 13, a flow guiding disk 6, and a second flow guiding ring 7 arranged in sequence from top to bottom. A plurality of damping protrusions are provided on the first flow guiding ring 13, the flow guiding disk 6, and the second flow guiding ring 7. The flow guiding assembly forms a plurality of damping gaps between the flow guiding assemblies and between the flow guiding assembly and the intermediate positioning disk 5, the first magnetic isolation ring 14, and the lower positioning disk 8 through the damping protrusions. Through holes for communicating the damping gaps are opened at the centers of the intermediate positioning disk 5, the flow guiding disk 6, and the lower positioning disk 8. The through hole of the intermediate positioning disk 5 cooperates with the through hole of the second magnetic isolation ring 4 to form a flow channel; The second exciting coil 3 and the first exciting coil 15 of the present invention are arranged in parallel and independently adjust the magnetic field intensities of the upper valve structure and the lower valve structure respectively. That is, the magnetic field generated by the first exciting coil 15 acts on the damping gap of the lower valve structure through the second magnetic conduction ring 16, and the second exciting coil 3 acts on the damping gap of the upper valve structure to form a parallel magnetic field adjustment mechanism; the second magnetic isolation ring 4 is located at the bottom of the upper valve structure and can block the downward diffusion of the magnetic field of the second exciting coil 3 to avoid coupling with the magnetic field of the first exciting coil 15; the first magnetic isolation ring 14 is located between the intermediate positioning disk 5 and the lower positioning disk 8 and can isolate the upward leakage of the magnetic field of the first exciting coil 15; When the first exciting coil 15 and the second exciting coil 3 are not energized, under the action of the spring 10, the valve core 11 forms a surface seal with the second magnetic isolation ring 4, and the valve core assembly is in the normal closed position; When the first exciting coil 15 and the second exciting coil 3 are energized, the valve core 11 moves upward under the action of the magnetic field of the second exciting coil 3. At this time, an adjustable damping gap is formed between the valve core 11 and the second magnetic isolation ring 4; when the magnetorheological fluid passes through the damping gap, it is affected by the magnetic field generated by the first exciting coil 15, so as to control the magnetic field intensity in the damping gap, change the dynamic viscosity of the magnetorheological fluid, and thus change the resistance of the magnetorheological fluid flowing through the inside of the valve body, achieving the purpose of adjusting the output pressure drop of the valve; at this time, the spring 10 is subjected to a pressing force, and the valve core assembly is in the working open position.

[0022] In some embodiments, as Figure 1 、 Figure 3 shown, the top positioning disk 1 includes a positioning disk and a circular ring protrusion at the lower end of the positioning disk. A through hole is provided at the center of the positioning disk. The circular ring protrusion is concentric with the positioning disk. A hole for placing the valve core 11 is provided inside the circular ring protrusion. The hole is communicated with the through hole at the center of the positioning disk to ensure that the fluid can smoothly enter the damping gap of the upper valve structure; The valve core 11 includes a valve core disc and a cylindrical protrusion located at the upper end of the valve core disc. The upper end of the cylindrical protrusion is located in the hole of the annular protrusion. The hole in the annular protrusion provides an axial movement guide for the cylindrical protrusion of the valve core 11, ensuring that the valve core 11 keeps the axis aligned when moving up and down to avoid deviation or jamming, thereby ensuring the stability and reliability of the opening / closing of the magnetorheological valve; a spring hole is provided at the top center of the cylindrical protrusion, and a spring 10 is installed in the spring hole. The upper end of the spring 10 contacts the positioning disc, and the lower end of the spring 10 is fixed through the spring hole. The upper end abuts against the positioning disc of the top positioning disc 1 to form a stable elastic support. When normally closed: the preload force of the spring 10 pushes the valve core 11 downward, forming a surface seal with the second magnetic isolation ring 4 to ensure that there is no leakage in the closed state of the valve. When powered on: the spring 10 is compressed and stores elastic potential energy. When the excitation coil is powered off, the spring force can quickly push the valve core 11 to reset, realizing the rapid closure of the valve.

[0023] In some embodiments, Figure 1 , Figure 3 As shown, damping protrusions are provided on the left and right sides of the upper end of the cylindrical protrusion and on the left and right sides of the valve core disc. The damping protrusions on both sides of the cylindrical protrusion contact the inner wall of the annular protrusion in the top positioning disc 1 to form a damping gap, and the damping protrusions on both sides of the valve core disc contact the inner wall of the upper positioning disc 12 to form a damping gap. When the first and second excitation coils are energized, a magnetic field will be formed in the damping gap, and the viscosity of the magnetorheological fluid will increase rapidly under the action of the magnetic field, and the flow resistance will be significantly improved. Multiple damping gaps expand the area of action of the magnetic field, allowing more magnetorheological fluid to participate in the damping effect, thereby enhancing the output pressure drop adjustment ability of the valve. When the valve core 11 moves, the effective flow cross-sectional area of the damping gap can be dynamically adjusted by changing the size of the axial gap (such as the amount of spring compression), and the fluid resistance can be further refined.

[0024] In some embodiments, Figure 1 As shown, the outer diameter of the second magnetic isolation ring 4 is the same as the outer diameter of the first magnetic conductive ring 9. The second magnetic isolation ring 4 limits the diffusion of the magnetic field, forcing the magnetic lines of force to be concentrated in the first magnetic conductive ring 9, the valve core 11 and other magnetic conductive components, to prevent the magnetic field from leaking to the non-working area, thereby enhancing the magnetic field strength at the damping gap and improving the damping effect of the magnetorheological fluid; a circular groove is provided at the upper end of the second magnetic isolation ring 4, and the diameter of the circular groove is the same as the inner diameter of the upper positioning plate 12, so that the valve core 11 forms an embedded positioning structure on the second magnetic isolation ring 4, which can accurately define the axial and radial positions of the valve core 11 to avoid displacement or shaking during assembly.

[0025] In some embodiments, Figure 1As shown, both the intermediate positioning disk 5 and the lower positioning disk 8 include a positioning disk and a positioning boss located on one side of the positioning disk. The positioning disk and the positioning boss are concentrically arranged, and through holes integrally connected are provided on the positioning disk and the positioning boss, reducing the seams and stress concentration points of the split structure, enhancing the overall rigidity, and being applicable to complex working conditions such as high pressure and vibration; the diameters of the two positioning disks are the same and are the same as the inner diameter of the second magnetic conduction ring 16, enabling the intermediate positioning disk 5, the lower positioning disk 8 and the second magnetic conduction ring 16 to form a tightly nested structure, enhancing the mechanical stability of the magnetic circuit and at the same time ensuring the effective conduction of magnetic lines of force within the magnetic conduction ring; the outer diameter of the second magnetic conduction ring 16 is the same as the outer diameter of the second magnetic isolation ring 4, ensuring the alignment of the magnetic conduction ring and the magnetic isolation ring in terms of size, facilitating integrated installation within the same valve body or component to form a stable magnetic shielding / conduction system and avoiding magnetic leakage or magnetic field interference; the positioning boss provides an accurate axial and radial positioning reference for the first magnetic isolation ring 14, avoiding magnetic circuit misalignment or component interference caused by position deviation during assembly, and improving the assembly efficiency and consistency.

[0026] In some embodiments, as Figure 1 shown, damping protrusions are provided at the upper end, left and right sides of the first flow guiding ring 13, and a damping gap is formed between the first flow guiding ring 13 and the intermediate positioning disk 5 and the first magnetic isolation ring 14 through the damping protrusions; damping protrusions are provided at the upper and lower ends of the flow guiding disk 6, and a damping gap is formed between the flow guiding disk 6 and the first flow guiding ring 13 and the second flow guiding ring 7 through the damping protrusions; damping protrusions are provided at the lower end, left and right sides of the second flow guiding ring 7, and a damping gap is formed between the second flow guiding ring 7 and the first magnetic isolation ring 14 and the lower positioning disk 8 through the damping protrusions. The damping protrusions improve the gap uniformity, and through the contact between the protrusions and the inner wall, the formation of turbulence or eddy currents of the fluid in the flow channel is avoided, reducing energy loss; in the magnetic force system, a uniform gap can avoid magnetic field distortion and ensure the stability of magnetic force conduction; in addition, by forming multiple damping gaps, fine control of the fluid / movement is achieved, which is applicable to scenarios requiring stable pressure, flow rate or movement trajectory.

[0027] In some embodiments, as Figure 3 shown, the damping protrusions are cylindrical, with a simple structure and convenient processing. In addition, each damping protrusion can have the same size.

[0028] Embodiment 2: As Figure 4 、 Figure 5 and Figure 6 shown, a magnetorheological valve with a parallel coil and multi-channel shunt damping further includes a valve body assembly. The valve body assembly includes an upper valve body 20 and a lower valve body 21, and a plurality of valve core assemblies of Embodiment 1 are installed in parallel between the upper valve body 20 and the lower valve body 21; Specifically, the magnetorheological valve includes a first spool assembly Ⅰ, a second spool assembly Ⅱ, and a third spool assembly Ⅲ arranged in parallel. Each spool assembly is embedded between the upper valve body 20 and the lower valve body 21. The upper valve body 20 and the lower valve body 21 are connected by eight compression bolts 22, and the entire magnetorheological valve is sealed by a first sealing ring 19 and two second sealing rings 17. The outer circumference of the middle spool assembly is wrapped by a third magnetic isolation ring 18, so that the coils in the first spool assembly Ⅰ, the second spool assembly Ⅱ, and the third spool assembly Ⅲ do not interfere with each other.

[0029] In some embodiments, as Figure 4 and Figure 5 shown, the upper valve body 20 is provided with a liquid inlet 23, and the lower valve body 21 is provided with a liquid outlet 24. The liquid inlet 23 is communicated with the through holes on the top positioning disc 1 in each parallel spool assembly, and the liquid outlet 24 is communicated with the through holes on the lower positioning disc 8. When the first excitation coil 15 and the second excitation coil 3 in each spool assembly are energized, the spool 11 moves upward under the action of the magnetic field of the second excitation coil 3, forming an adjustable damping gap with the second magnetic isolation ring 4. The outer side of the middle second spool assembly Ⅱ is wrapped by the third magnetic isolation ring 18. Through the magnetic shielding effect of the magnetic isolation ring, the coils in the three spool assemblies do not interfere with each other. When the magnetorheological fluid passes through the damping gap, it is affected by the magnetic field of the first excitation coil 15, so as to control the intensity of the magnetic field in the damping gap, change the dynamic viscosity of the magnetorheological fluid, and thus change the resistance of the magnetorheological fluid flowing through the inside of the valve body, achieving the purpose of adjusting the output pressure drop of the valve. The magnetorheological fluid enters each spool assembly through the liquid inlet 23 and the through holes on the top positioning disc 1, passes through the damping gaps in the three spool assemblies respectively, and finally returns to the liquid outlet 24. At this time, the spring 10 is under a pressing action, and the whole valve is in the working open position.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the protection content of the present invention.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetorheological valve with a parallel coil and multi-channel shunt damping, characterized in that, Comprising a spool assembly, which includes: An upper valve structure, including a spool. There is a top positioning disc above the spool. A spring is installed between the spool and the top positioning disc. The bottom of the spool is connected to the second magnetic isolation ring. The lower end of the spool is sleeved with an upper positioning disc, and the upper positioning disc is connected to the second magnetic isolation ring. A winding frame is sleeved between the top positioning disc and the upper positioning disc. A second exciting coil is wound on the winding frame. The outside of the top positioning disc, the winding frame, the second exciting coil and the upper positioning disc is sleeved with a first magnetic conduction ring. There are a plurality of damping protrusions on the outside of the spool. Multiple damping gaps are formed between the spool and the top positioning disc and the upper positioning disc through the damping protrusions. Through holes are opened at the centers of both the top positioning disc and the second magnetic isolation ring; A lower valve structure, including a flow guiding assembly. There is an intermediate positioning disc above the flow guiding assembly. The top of the intermediate positioning disc is connected to the bottom of the second magnetic isolation ring. A lower positioning disc is installed below the flow guiding assembly. A first magnetic isolation ring is sleeved between the intermediate positioning disc and the lower positioning disc. A first exciting coil is wound on the first magnetic isolation ring. The outside of the intermediate positioning disc, the first exciting coil and the lower positioning disc is sleeved with a second magnetic conduction ring. The flow guiding assembly includes a first flow guiding ring, a flow guiding disc and a second flow guiding ring. There are a plurality of damping protrusions on the first flow guiding ring, the flow guiding disc and the second flow guiding ring. Multiple damping gaps are formed between the flow guiding assembly through the damping protrusions, and between the flow guiding assembly and the intermediate positioning disc, the first magnetic isolation ring and the lower positioning disc. Through holes are opened at the centers of the intermediate positioning disc, the flow guiding disc and the lower positioning disc. The through hole of the intermediate positioning disc and the through hole of the second magnetic isolation ring cooperate to form a flow channel; When the first and second exciting coils are not energized, a surface seal is formed between the spool and the second magnetic isolation ring under the action of the spring, and the spool assembly is in the normal closed position; when the first and second exciting coils are energized, the spool moves upward under the drive of the second exciting coil, and an adjustable damping gap is formed between the spool and the second magnetic isolation ring.

2. The magneto-rheological valve with parallel coils and multi-channel shunt damping according to claim 1, characterized in that The top positioning disc includes a positioning disc and a circular ring protrusion located at the lower end of the positioning disc. The through hole is provided at the center of the positioning disc. The circular ring protrusion is concentrically arranged with the positioning disc. A hole for placing the spool is provided inside the circular ring protrusion, and the hole communicates with the through hole at the center of the positioning disc; The spool includes a spool disc and a cylindrical protrusion located at the upper end of the spool disc. The upper end of the cylindrical protrusion is located in the hole of the circular ring protrusion. A spring hole is provided at the top center of the cylindrical protrusion, and a spring is installed in the spring hole. The upper end of the spring contacts the positioning disc.

3. The magneto-rheological valve with parallel coils and multi-channel shunt damping according to claim 2, characterized in that, Damping protrusions are provided on both the left and right sides of the upper end of the cylindrical protrusion and on both the left and right sides of the spool disc. The damping protrusions on both sides of the cylindrical protrusion contact the inner wall of the circular ring protrusion in the top positioning disc to form a damping gap, and the damping protrusions on both sides of the spool disc contact the inner wall of the upper positioning disc to form a damping gap.

4. A magneto-rheological valve with a parallel coil and multi-channel shunt damping according to claim 1, characterized in that, The outer diameter of the second magnetic isolation ring is the same as the outer diameter of the first magnetic conduction ring. A circular groove is opened at the upper end of the second magnetic isolation ring, and the diameter of the circular groove is the same as the inner diameter of the upper positioning disc.

5. A magneto-rheological valve with parallel coils and multi-channel shunt damping according to claim 1, characterized in that, Both the middle positioning disk and the lower positioning disk include a positioning disk and a positioning boss located on one side of the positioning disk. The positioning disk and the positioning boss are concentrically arranged, and through holes integrated with each other are provided on the positioning disk and the positioning boss. The diameters of the two positioning disks are the same and are the same as the inner diameter of the second magnetic conduction ring. The outer diameter of the second magnetic conduction ring is the same as the outer diameter of the second magnetic isolation ring. The positioning boss is used for the positioning and installation of the first magnetic isolation ring.

6. A magneto-rheological valve with a parallel coil and multi-channel shunt damping according to claim 1, characterized in that Damping protrusions are provided at the upper end, left and right sides of the first diversion ring. Damping gaps are formed between the first diversion ring and the middle positioning disk and the first magnetic isolation ring through the damping protrusions. Damping protrusions are provided at the upper and lower ends of the diversion disk. Damping gaps are formed between the diversion disk and the first diversion ring and the second diversion ring through the damping protrusions. Damping protrusions are provided at the lower end, left and right sides of the second diversion ring. Damping gaps are formed between the second diversion ring and the first magnetic isolation ring and the lower positioning disk through the damping protrusions.

7. A magneto-rheological valve with parallel coils and multi-channel shunt damping according to claim 1 or 6, characterized in that, The damping protrusions are cylindrical.

8. A magneto-rheological valve with a parallel coil and multi-channel shunt damping according to claim 1, characterized in that, It further includes a valve body assembly, and the valve body assembly includes an upper valve body and a lower valve body. A plurality of the spool assemblies are installed in parallel between the upper valve body and the lower valve body.

9. A magneto-rheological valve with a parallel coil and multi-channel shunt damping according to claim 8, characterized in that Three of the spool assemblies are installed in parallel between the upper valve body and the lower valve body. Each spool assembly is embedded between the upper valve body and the lower valve body. The upper valve body and the lower valve body are connected by compression bolts. Sealing rings are installed between each spool assembly and the upper valve body and the lower valve body. A third magnetic isolation ring is installed circumferentially between the upper valve body and the lower valve body of the spool assembly in the middle to prevent the excitation coils of each spool assembly from interfering with each other.

10. A magneto-rheological valve with parallel coils and multi-channel shunt damping according to claim 8 or 9, characterized in that The upper valve body is provided with a liquid inlet, and the lower valve body is provided with a liquid outlet. The liquid inlet is communicated with the through hole on the top positioning disk in each of the spool assemblies connected in parallel, and the liquid outlet is communicated with the through hole on the lower positioning disk. The magnetorheological fluid enters each spool assembly from the liquid inlet, passes through the damping gap in each spool assembly, and finally returns to the liquid outlet.

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