Multi-radial magneto-rheological valve

Abstract

A multi-radial-direction magneto-rheological valve comprises a valve body, a winding frame used for installing a magnet exciting coil, an end cover, positioning discs and a plurality of damping discs located between the positioning discs, and a plurality of flow channels used for flowing of magneto-rheological fluid are formed in the valve body; a center hole is formed in the center of the positioning disc, and at least one flow channel is formed in the center hole; the winding frame is arranged between the positioning discs and located on the two sides of the damping disc, and at least one flow channel is formed by the winding frame and the damping disc; the damping disc and the positioning disc are in positioning connection and form an inner flow channel and an outer flow channel on the two sides; and the end cover is connected with the valve body through a fastener to form integral axial positioning. A plurality of radial flow channels and axial flow channels are formed in the valve body, and complex and diversified fluid channels are jointly formed through a center hole of the positioning disc, a flow channel between the winding frame and the damping disc and inner and outer flow channels between the damping disc and the positioning disc. And due to the design of multiple radial and axial flow channels, the flow channel layout is more compact, and the overall size of the valve is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of multi-radial magnetic type magneto-rheological valve, belong to magneto-rheological valve field. BACKGROUND

[0002] Magnetorheological Fluid (MRF) is a kind of intelligent liquid material mainly composed of base carrier liquid, proper additive and uniformly dispersed soft magnetic particles, and has unique magnetorheological effect. Under the action of external magnetic field, it can change from Newtonian fluid with good flow performance to Bingham fluid in solid state in milliseconds. This change is continuous and reversible and controllable. Studies have shown that magnetorheological effect is mainly related to magnetic field, and is also affected by its physical properties. The inherent rheological properties of magnetorheological fluid make it suitable for various industrial fields, such as magnetorheological vibration damping devices, sensors and automotive semi-active suspension systems.

[0003] Traditional hydraulic valves usually have problems such as difficulty in control, complex structure and difficulty in maintenance. Magnetorheological valve (MRV) is a new type of intelligent hydraulic device, which can replace traditional hydraulic valves to some extent and improve these problems.

[0004] Single-channel circular annular flow channel type is the most basic structure of magnetorheological valve. Its structure is assembled by end cover, positioning disc, valve body, excitation coil, valve core and flow guide disc. The valve core is fixed in the valve body by positioning pin, and the liquid flow channel between the valve body and the valve core forms a circular annular damping gap. The two leads of the coil pass through the lead slot on the valve core and finally pass out of the lead hole on the end cover. The magnetic circuit of the circular annular flow magnetorheological valve first reaches the left end of the damping gap from the valve body, vertically passes through the damping gap, then passes through the valve core to the right end of the damping gap, and then vertically passes through the right end of the damping gap back to the valve body to form a closed loop. When the excitation coil wound on the valve core is energized, the magnetorheological fluid in the circular annular damping gap exhibits controllable shear stress, causing pressure drop at the inlet and outlet of the magnetorheological valve.

[0005] Domestic and foreign scholars mainly focus on improving the pressure drop by optimizing the basic structure parameters of magnetorheological valve, such as increasing the number of excitation coil, prolonging the effective damping length of liquid flow channel and reducing the width of damping gap. However, there is little research on the regularity analysis of the influence of liquid flow channel structure change on the pressure drop of magnetorheological valve. Based on these problems, the present application is based on the structure of conventional circular annular flow channel type magnetorheological valve, and aims to improve the above problems without changing the overall size of circular annular flow magnetorheological valve. UTILITY MODEL CONTENTS

[0006] The utility model discloses a multi-radial magnetic type magneto-rheological valve which overcomes the shortcomings and deficiencies of the prior art.

[0007] A multi-radial magnetic type magneto-rheological valve comprises a valve body, a bobbin for mounting an excitation coil, an end cover, a positioning disc and a plurality of damping discs located between the positioning discs.

[0008] The center of the positioning disc is provided with a center hole, and the center hole forms at least one flow channel.

[0009] The bobbin is arranged between the positioning discs and located on both sides of the damping discs, and the bobbin and the damping discs form at least one flow channel.

[0010] The damping discs are positioned and connected with the positioning discs and form inner and outer radial flow channels on both sides.

[0011] The end cover is connected with the valve body through fasteners to form overall axial positioning.

[0012] The valve body is provided with a plurality of radial and axial flow channels, and the center hole of the positioning disc, the flow channel between the bobbin and the damping discs and the inner and outer radial flow channels between the damping discs and the positioning discs jointly constitute complex and various fluid channels. The design of the multi-radial and axial flow channels makes the flow channel layout more compact, and the overall size of the valve is effectively reduced. By optimizing the number, size and magnetic field distribution of the flow channels, the flow resistance of the magneto-rheological fluid can be accurately controlled, thereby increasing the adjustment range of the pressure drop and enhancing the utilization rate of the material and the magnetic field. The design of the flow channels in the valve body in combination with the arrangement of the excitation coil helps to realize rapid and sensitive magnetic field control, thereby changing the rheological properties of the magneto-rheological fluid and significantly improving the response speed and dynamic adjustment performance of the magneto-rheological valve.

[0013] Preferably, the center hole of the positioning disc forms a circular hole flow channel. The circular hole flow channel can provide more uniform flow velocity distribution, which helps the magneto-rheological fluid to be subjected to stable and consistent magnetic field action when flowing through the flow channel.

[0014] Preferably, the damping disc comprises a second damping disc and a third damping disc arranged in the middle portion, the third damping disc is provided with a mounting hole in the center, and a gap is arranged between the mounting hole and the second damping disc, so that the second damping disc and the mounting hole form an axial annular flow channel. The gap between the second damping disc and the mounting hole constitutes an axial annular flow channel, which provides a stable and continuous flow path for the magneto-rheological fluid. The design of the axial annular flow channel can make the magneto-rheological fluid distribute more uniformly when flowing through the flow channel, effectively reduce the problems of fluid turbulence and local velocity mutation, optimize the liquid flow characteristics and improve the response performance.

[0015] Further, the damping disc further comprises a first damping disc and a fourth damping disc located on both sides of the third damping disc, and the first damping disc and the fourth damping disc form inner and outer radial flow channels with the third damping disc and the two end positioning discs. The first damping disc, the third damping disc, and the fourth damping disc cooperate with the positioning disc to form the inner and outer radial flow channels. This design significantly increases the number of flow channels in a limited space, provides more passages for the flow of the magnetorheological fluid, and significantly improves the fluid passing capacity of the valve. The design of the inner and outer radial flow channels effectively guides the distribution of the magnetorheological fluid in different areas, makes the fluid flow more uniform, reduces turbulence and local speed fluctuation problems, and further improves the stability and efficiency of the system operation.

[0016] Further, the second damping disc is in the shape of an I-beam and is arranged in the mounting hole, and the two ends of the second damping disc extend out of the mounting hole and are fixedly connected with the first damping disc and the fourth damping disc by bolts. The second damping disc is in the shape of an I-beam and is arranged in the mounting hole of the third damping disc, and effectively guides the flow of the magnetorheological fluid in the flow channel through its special shape and position, optimizes the fluid distribution and flow characteristics, thereby reducing turbulence and local flow unevenness, and improving the fluid flow performance. The design of the I-beam-shaped second damping disc can form multiple magnetic field action areas in the flow channel, which helps to enhance the magnetic field control effect of the magnetorheological fluid, thereby further improving the adjustment accuracy and response ability of the valve.

[0017] Further, the outer wall of the first damping disc and the fourth damping disc is provided with a first flange located on the outer side wall and a second flange located on the two side end faces, and the first damping disc and the fourth damping disc are transitionally and fitly connected with the bobbin through the first flange. The first flange and the bobbin are transitionally and fitly connected, which can effectively realize the precise positioning of the first damping disc and the fourth damping disc, avoid loosening or deviation of the components during assembly or use, and thereby improve the overall stability of the structure.

[0018] Further, the first damping disc and the fourth damping disc are positioned and connected with the positioning disc and the third damping disc through the second flange. The second flange is positioned and connected with the positioning disc and the third damping disc, forming multiple-point support and constraint, which can effectively improve the installation stability of the damping disc and prevent displacement or loosening of the components during operation due to vibration or pressure.

[0019] Further, the first damping disc, the third damping disc, and the fourth damping disc are all transitionally and fitly connected with the inner surface of the valve body. The transitionally and fitly connection of the damping disc with the inner surface of the valve body can maintain the integrity and symmetry of the flow channel structure, reduce turbulence and energy loss of the fluid in the transition area, and further improve the flow efficiency.

[0020] Preferably, the positioning disc is provided with mounting bosses on two sides, and the bobbin is positioned and connected with the mounting bosses of the two end positioning discs.

[0021] Preferably, the valve body is provided with a lead-out hole, and the valve body is transitionally connected with the positioning disc.

[0022] The beneficial effects of the utility model are as follows: a plurality of radial and axial flow channels are arranged in the valve body, and the center hole of the positioning disc, the flow channels between the bobbin and the damping disc and the inner-outer diameter flow channels between the damping disc and the positioning disc jointly form complex and various fluid channels. The design of the plurality of radial and axial flow channels makes the flow channel layout more compact, and the overall size of the valve is effectively reduced. Through optimization of the number, size and magnetic field distribution of the flow channels, the flow resistance of the magneto-rheological fluid can be accurately controlled, thereby increasing the regulation range of the pressure drop and enhancing the utilization rate of the material and the magnetic field. The flow channel design in the valve body in combination with the arrangement of the excitation coil helps to realize rapid and sensitive magnetic field control, thereby changing the rheological properties of the magneto-rheological fluid, and significantly improving the response speed and dynamic regulation performance of the magneto-rheological valve. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0024] Fig. 1 It is the main structure diagram of the utility model;

[0025] Fig. 2 It is the sectional structure diagram of the utility model;

[0026] In the drawings, 1, valve body;11, lead-out hole;2, bobbin;3, end cover;31, fastener;4, positioning disc;41, center hole;42, mounting boss;5, first damping disc;51, first flange;52, second flange;6, second damping disc;7, third damping disc;71, mounting hole;8, fourth damping disc. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0028] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0029] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0030] like Figs. 1-2 As shown, this is an embodiment of a multi-radial magnetorheological valve of the present invention, including a valve body 1, a winding frame 2 for mounting the excitation coil, an end cap 3, a positioning disk 4, and a plurality of damping disks located between the positioning disks 4. The valve body 1 is provided with a plurality of flow channels for the flow of magnetorheological fluid.

[0031] The positioning disk 4 has a central hole 41, which forms at least one flow channel;

[0032] The winding frame 2 is disposed between the positioning disks 4 and located on both sides of the damping disk, and the winding frame 2 and the damping disk form at least one flow channel;

[0033] The damping disc is positioned and connected to the positioning disc 4, forming inner and outer flow channels on both sides;

[0034] The end cap 3 is connected to the valve body 1 by fasteners 31 to form an integral axial positioning.

[0035] The valve body 1 is provided with multiple radial and axial flow channels, which together form a complex and diverse fluid channel through the central hole 41 of the positioning disc 4, the flow channel between the bobbin 2 and the damping disc, and the inner and outer diameter flow channel between the damping disc and the positioning disc 4. The design of multiple radial and axial flow channels makes the flow channel layout more compact, effectively reducing the overall size of the valve. By optimizing the number, size and magnetic field distribution of the flow channels, precise control of the flow resistance of the magnetorheological fluid can be achieved, thereby increasing the adjustment range of the pressure drop and enhancing the utilization rate of the material and magnetic field. The design of the flow channel in the valve body 1 in combination with the arrangement of the excitation coil helps to achieve rapid and sensitive magnetic field control, thereby changing the rheological properties of the magnetorheological fluid and significantly improving the response speed and dynamic adjustment performance of the magnetorheological valve. The design of multiple radial and axial flow channels makes the flow channel layout more compact, effectively reducing the overall size of the valve. This feature enables the valve to be applied to space-limited application scenarios, such as precision machinery or micro-hydraulic systems.

[0036] The central hole 41 of the positioning disc 4 forms a circular hole flow channel. The circular hole flow channel can provide a more uniform flow rate distribution, which helps to stabilize and uniformly apply the magnetic field to the magnetorheological fluid flowing through the flow channel.

[0037] The positioning disc 4 is provided with a central hole 41, preferably a circular hole flow channel, which provides an axial passage for achieving a stable and uniform magnetic field action area. The circular hole flow channel structure is stable and can provide uniform flow rate, which helps to achieve symmetrical distribution of the magnetic field and consistency of the magnetorheological fluid performance response. The diameter of the circular hole flow channel can be easily adjusted, which can be flexibly designed to adapt to different magnetorheological fluid flow requirements. This adjustability improves the applicability and versatility of the valve in various working conditions.

[0038] The damping disc includes a second damping disc 6 and a third damping disc 7 arranged in the middle, the third damping disc 7 is provided with a mounting hole 71, and a gap is arranged between the mounting hole 71 and the second damping disc 6, so that the second damping disc 6 and the mounting hole 71 form an axial annular flow channel. The gap between the second damping disc 6 and the mounting hole 71 forms an axial annular flow channel, which provides a stable and continuous flow path for the magnetorheological fluid. The design of the axial annular flow channel can make the magnetorheological fluid flow more uniformly, effectively reduce the problem of fluid turbulence and local velocity sudden change, optimize the fluid flow characteristics, and improve the response performance. The gap design between the mounting hole and the second mounting hole provides a certain assembly allowance, reduces the processing precision requirement, and reduces the generation of assembly stress, thereby improving the reliability and consistency of the structure assembly. The design of the axial annular flow channel avoids the shape of the flow channel being too narrow, which helps to reduce the risk of blockage of particle impurities or magnetorheological fluid deposits in the flow channel, thereby improving the operation stability and service life of the magnetorheological valve.

[0039] The difference between this embodiment and the above-mentioned embodiments is that the damping disc further comprises a first damping disc 5 and a fourth damping disc 8 located on both sides of the third damping disc 7, and the first damping disc 5 and the fourth damping disc 8 form inner and outer radial flow channels with the third damping disc 7 and the two end positioning discs 4. The first damping disc 5, the third damping disc 7, and the fourth damping disc 8 cooperate with the positioning disc 4 to form inner and outer radial flow channels. This design significantly increases the number of flow channels in a limited space, providing more paths for the flow of magnetorheological fluid and significantly improving the fluid passing capacity of the valve. The design of the inner and outer radial flow channels effectively guides the distribution of magnetorheological fluid in different areas, making the fluid flow more uniform, reducing turbulence and local speed fluctuation problems, and further improving the stability and efficiency of the system operation. The arrangement of the inner and outer radial flow channels enables the magnetic field to act on multiple flow areas simultaneously, expanding the controlled range of magnetorheological fluid and enhancing the valve's adjustment ability and response performance, meeting the precise control requirements.

[0040] The second damping disc 6 is in the shape of an I-beam and is arranged in the mounting hole 71, and the two ends of the second damping disc 6 extend out of the mounting hole 71 and are fixedly connected with the first damping disc 5 and the fourth damping disc 8 through bolts. The second damping disc 6 is in the shape of an I-beam and is arranged in the mounting hole 71 of the third damping disc 7, and through its special shape and position, it effectively guides the flow of magnetorheological fluid in the flow channel, optimizes fluid distribution and flow characteristics, thereby reducing turbulence and local flow unevenness, and improving fluid flow performance. The design of the I-beam-shaped second damping disc 6 can form multiple magnetic field action areas in the flow channel, which helps to enhance the magnetic field control effect of magnetorheological fluid, thereby further improving the adjustment accuracy and response ability of the valve.

[0041] The difference between this embodiment and the above-mentioned embodiments is that the first damping disc 5 and the fourth damping disc 8 are provided with a first flange 51 located on the outer side wall and a second flange 52 located on the two side end faces on the outer wall, and the first damping disc 5 and the fourth damping disc 8 are transitionally and fitly connected with the bobbin 2 through the first flange 51. The first flange 51 is transitionally and fitly connected with the bobbin 2, which can effectively realize the precise positioning of the first damping disc 5 and the fourth damping disc 8, avoid loosening or deviation of the components during assembly or use, and thereby improve the overall stability of the structure. The first flange and the second flange enhance the rigidity of the component connection through close transition fit, so that the valve can maintain structural integrity in a vibrating and impacting environment, adapting to complex working condition requirements.

[0042] The first damping disc 5 and the fourth damping disc 8 are connected with the positioning disc 4 and the third damping disc 7 through the second flange 52. The second flange 52 is connected with the positioning disc 4 and the third damping disc 7, forming multi-point support and constraint, which can effectively improve the installation stability of the damping disc, preventing displacement or loosening of the components during operation due to vibration or pressure effect. The close positioning connection of the second flange with the positioning disc and the third damping disc can disperse stress and provide sufficient support under the action of fluid pressure impact and external vibration, significantly enhancing the anti-vibration and impact resistance of the valve in complex working conditions.

[0043] The first damping disc 5, the third damping disc 7 and the fourth damping disc 8 are all connected with the circumferential inner surface of the valve body 1. The transition fit of the damping disc with the inner surface of the valve body 1 can maintain the integrity and symmetry of the flow passage structure, reduce the turbulence and energy loss of the fluid in the transition area, and further improve the flow efficiency.

[0044] The positioning disc 4 is provided with mounting bosses 42 on both sides, and the bobbin 2 is connected with the mounting bosses 42 of the two positioning discs 4. The design of the mounting bosses 42 enables the bobbin 2 to be quickly and accurately installed in place, ensuring that the bobbin 2 can be accurately aligned with the positioning disc 4 during assembly.

[0045] The valve body 1 is provided with a lead-out hole 11, and the valve body 1 is connected with the positioning disc 4 in a transition fit. The lead-out hole 11 provided on the valve body 1 provides a special outlet for the power cord of the excitation coil, making circuit connection more convenient and avoiding cable damage or poor contact caused by leading out the cable from irregular positions.

[0046] The difference between this embodiment and the above embodiment is that the first damping disc 5, the third damping disc 7, the fourth damping disc 8, the valve body 1 and the two positioning discs 4 are made of 10# low carbon steel with good magnetic conductivity, and the left and right end covers 3, the second damping disc 6 and the bobbin 2 are made of non-magnetic material 304 stainless steel.

[0047] The various parts are assembled reasonably, so that the excitation coil generates a magnetic field loop along a certain route by current excitation. When a certain size of current is applied to the coil, the induced magnetic field generated thereby will pass through the positioning disc 4, the magnetic damping disc in turn, and vertically pass through each radial flow channel to the other side positioning disc 4, and then pass through the valve body 1 to form a closed loop of magnetic lines. By regulating the size of the current, the magnetic induction intensity generated in the flow channel will also change differently, so that the magneto-rheological fluid generates nonlinear changes in viscosity and shear yield stress size with excitation, thereby realizing the working pressure drop performance regulation of the magneto-rheological valve. After the current is applied, the magnetic field propagates along the closed path of "positioning disc 4-magnetic damping disc-radial flow channel-the other side positioning disc 4-valve body 1". The magneto-rheological fluid is affected by the magnetic field in the flow channel, and the rheological properties (viscosity, shear yield strength) change nonlinearly with the magnetic induction intensity, thereby realizing pressure drop regulation.

[0048] A plurality of mounting holes 71 of different diameters are arranged on the third damping disc 7, which are matched with the second damping discs 6 of different sizes to adjust the channel width of the axial annular flow channel and adapt to the magneto-rheological fluid with different viscosity or response requirements.

[0049] The embodiment is different from the above-mentioned embodiments in that a spiral groove is arranged on the inner wall of the valve body 1 to cooperate with the micro-protruding structure on the edge of the damping disc, so as to realize directional disturbance of the magneto-rheological fluid and further enhance the shear force field effect.

[0050] The embodiment is different from the above-mentioned embodiments in that the flow channel area of the first, third and fourth damping discs is locally electroplated or coated with a wear-resistant coating to improve the durability and corrosion resistance under high-frequency response working conditions.

[0051] The above only discloses the preferred embodiments of the utility model, and of course cannot limit the scope of the utility model, so equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

[0052] Although the utility model has been described with reference to several specific embodiments, it should be understood that the utility model is not limited to the disclosed specific embodiments. The utility model is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.

Claims

1. A multi-radial magnetorheological valve, characterized by: The valve body, the winding frame for installing the excitation coil, the end cover, the positioning disc and the several damping discs between the positioning discs, the valve body is equipped with several flow channels for the magnetic rheological liquid flow; The center hole of the positioning disc is provided with a center hole, and the center hole forms at least one flow channel; The winding frame is arranged between the positioning discs and on both sides of the damping disc, and the winding frame and the damping disc form at least one flow channel; The damping disc is connected with the positioning disc and forms the inner and outer diameter flow channels on both sides. The end cover is connected with the valve body through the fastener and forms the integral axial positioning.

2. The multi-radial magnetorheological valve of claim 1, wherein: The center hole of the positioning disc forms the circular hole flow channel.

3. The multi-radial magnetorheological valve of claim 1, wherein: The damping disc includes the second damping disc and the third damping disc arranged in the middle part, the third damping disc is provided with a mounting hole in the center, and the mounting hole is provided with a gap between the second damping disc, so that the second damping disc and the mounting hole form the axial annular flow channel.

4. The magneto rheological valve of claim 3, wherein: The damping disc further includes the first damping disc and the fourth damping disc on both sides of the third damping disc, and the first damping disc and the fourth damping disc form the inner and outer diameter flow channels with the third damping disc and the two end positioning discs.

5. The multi-radial magnetorheological valve of claim 4, wherein: The second damping disc is in the shape of an I-beam and is arranged in the mounting hole, and the two ends of the second damping disc extend out of the mounting hole and are fixedly connected with the first damping disc and the fourth damping disc through the bolts.

6. The multi-radial magnetorheological valve of claim 4, wherein: The outer wall of the first damping disc and the fourth damping disc is provided with the first flange on the outer side wall and the second flange on the two side end faces, and the first damping disc and the fourth damping disc are transitionally and matchingly connected with the winding frame through the first flange.

7. The multi-radial magnetorheological valve of claim 6, wherein: The first damping disc and the fourth damping disc are positioned and connected with the positioning disc and the third damping disc through the second flange.

8. The magneto rheological valve of claim 4, wherein: The first damping disc, the third damping disc and the fourth damping disc are transitionally and matchingly connected with the circumferential inner surface of the valve body.

9. The multi-radial magnetorheological valve of claim 1, wherein: The two sides of the positioning disc are provided with the mounting boss, and the winding frame is positioned and connected with the mounting boss of the two end positioning discs.

10. The magneto rheological valve of claim 1, wherein: The valve body is provided with the lead-out hole, and the valve body and the positioning disc are transitionally and matchingly connected.

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