Improved low-energy single-coil magneto-rheological valve

Abstract

The application discloses an improved low-energy single-coil magneto-rheological valve which is mainly composed of two end covers, two positioning discs, a left flow guide block, a cylinder body, a winding frame, a right flow guide block, bolts, two positioning pins, an excitation coil and epoxy resin. An effective damping gap A is formed between the outer circumferential surface of the left end of the winding frame and the inner circumferential surface of the cylinder body, and an effective damping gap B is formed between the outer circumferential surface of the right end of the winding frame and the inner circumferential surface of the cylinder body. When the excitation coil is electrified, the winding frame, the effective damping gap A, the cylinder body and the effective damping gap B form a magnetic field closed loop. The current applied to the excitation coil is adjusted to control the magnetic field, change the dynamic viscosity of the magneto-rheological liquid, change the resistance of the magneto-rheological liquid flowing through the inside of the valve body, and achieve the purpose of regulating the output pressure drop of the valve. The magneto-rheological valve has the advantages of light weight, low energy consumption and high magnetic field utilization rate.

Description

Technical Field

[0001] This invention relates to a magnetorheological valve, and more particularly to an improved low-energy-consumption single-coil magnetorheological valve. Background Technology

[0002] Magnetorheological fluids are a novel type of smart material, composed of a non-magnetic base fluid, uniformly distributed highly permeable, low-hysteresis micro-magnetic particles, and additives. Under the influence of an external magnetic field, its fluid properties can continuously and reversibly transition between a Newtonian fluid state and a solid-like non-Newtonian fluid state within milliseconds, exhibiting controllable and highly responsive dynamic shear yield stress.

[0003] Chinese patent CN216279668U discloses a multi-channel magnetorheological valve, which establishes two fluid flow channels (inner and outer) and four effective damping gaps within a limited space, improving the pressure drop performance of the magnetorheological valve. The disadvantage is that the multiple fluid flow channels increase the overall mass of the valve body and significantly increase energy consumption. Chinese patent CN114909519A discloses a ring-shaped multi-channel magnetorheological valve, which has dual excitation coils and multiple effective damping gaps, effectively improving the output pressure drop. However, the long closed-loop magnetic field results in greater magnetic leakage, leading to low magnetic field utilization. Summary of the Invention

[0004] To address the aforementioned shortcomings, the purpose of this invention is to provide an improved low-energy-consumption single-coil magnetorheological valve, which has the advantages of light weight, low energy consumption, and high magnetic field utilization.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides an improved low-energy-consumption single-coil magnetorheological valve, characterized in that it includes a valve body, wherein the valve body is symmetrically provided with two end caps, two positioning discs, a left guide block, a cylinder, a winding frame, a right guide block, bolts, two positioning pins, an excitation coil, and epoxy resin from the outside to the inside at both ends. The end caps and positioning discs have a first through hole in their center. The left end face of the left guide block and the right end face of the right guide block have a central hole in their center. The outer circumferential surface of the end caps is tightly fitted to the inner circumferential surface of the cylinder, and its circumferential side is tightly fitted to the end face of the positioning disc. The circumferential edge of the positioning disc abuts against the inner wall of the cylinder, and a first positioning pin is inserted into its center. The positioning pin passes through the first through hole in the middle of the positioning disk and engages with the center hole on the end face of the guide block to fix the positioning disk and the guide block. The valve body is provided with a winding frame in the middle, and the excitation coil is wound on the winding frame. Epoxy resin is applied to the outer layer of the excitation coil. The right end face of the left guide block is provided with a cylindrical protrusion in the middle, and the left end face of the right guide block is provided with a center hole. The cylindrical protrusion on the right end of the left guide block and the center hole on the left end of the right guide block are interference-fitted. The outer circumferential surfaces of the left and right guide blocks are in close contact with the inner circumferential surfaces of the winding frame. The side wall of the valve body has a second through hole for leading out the coil on the excitation coil.

[0007] Furthermore, a sealing ring is provided between the end cap and the inner circumferential surface of the cylinder.

[0008] Furthermore, the end cap and the cylinder body are fixedly connected by bolts.

[0009] Furthermore, the first through hole on the end cap is an internally threaded hole, used for interconnection with an external oil passage.

[0010] Furthermore, a groove is formed on the end face of the end cap that is in close contact with the positioning plate.

[0011] Furthermore, the positioning disk is coaxial with the first through hole of the guide block.

[0012] Furthermore, a gap must be left between the outermost layer of the excitation coil and the highest point of the winding frame.

[0013] Furthermore, the thickness of the epoxy resin coating must not exceed the gap thickness.

[0014] Furthermore, the winding frame is a hollow structure, and the winding recess is semi-circular in shape.

[0015] Furthermore, the winding frame, cylinder, screws and positioning pins are made of silicon steel, while the remaining parts are made of low-density aluminum alloy as a non-magnetic material.

[0016] Compared with the prior art, the improved low-energy-consumption single-coil magnetorheological valve proposed in this invention has the following beneficial effects:

[0017] 1. This invention reduces the overall weight of the valve by changing the structure of the winding frame, ensuring the rigidity of the winding frame, machining a through hole in its center, removing the high-density silicon steel material, and replacing it with a low-density aluminum alloy material, thereby making the valve body lighter.

[0018] 2. This invention uses a hollow semi-circular winding frame, which changes the trajectory of the closed-loop magnetic field. Compared with existing single-coil magnetorheological valves of the same structure, this embodiment shortens the closed-loop magnetic field, greatly reduces magnetic leakage, thereby improving the utilization rate of the magnetic field. It also requires less external current to achieve the same output voltage drop, thus reducing energy consumption.

[0019] 3. This invention uses epoxy resin to wrap the excitation coil, preventing it from directly contacting the magnetorheological fluid, which helps to extend the service life of the coil. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an improved low-energy single-coil magnetorheological valve provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the magnetorheological fluid flow direction provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the left guide block provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the right guide block provided in an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional view of the winding frame provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-End cap, 2-Sealing ring, 3-Positioning plate, 4-Left guide block, 5-Cylinder body, 6-Second through hole, 7-Winding frame, 8-Right guide block, 9-Bolt, 10-Positioning pin, 11-Excitation coil, 12-Epoxy resin, 401-Cylindrical protrusion. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, the present invention provides an improved low-energy single-coil magnetorheological valve, characterized in that it includes a valve body, wherein the valve body is symmetrically provided with two end caps (1), two positioning discs (3), a left guide block (4), a cylinder (5), a winding frame (7), a right guide block (8), bolts (9), two positioning pins (10), a structural excitation coil (11), and epoxy resin (12) from the outside to the inside.

[0030] The end cap (1) and the positioning plate (3) have a first through hole in the middle. The positioning plate (3) is coaxial with the first through hole of the guide block. The left end face of the left guide block (4) and the right end face of the right guide block (8) have a center hole in the middle. The end cap (1) is fixedly connected to the cylinder (5) by bolts (9) and a sealing ring (2) is provided at the contact point between the end cap (1) and the inner circumferential surface of the cylinder (5). The end cap (1) has a groove on the end face of the positioning plate (3) that is close to the side of the end cap (1). The circumferential edge of the positioning plate (3) abuts against the inner wall of the cylinder (5) and has a groove in the middle. A first through hole into which a positioning pin (10) can be inserted is provided. The positioning pin (10) passes through the first through hole in the middle of the positioning disk and cooperates with the center hole on the end face of the guide block to fix the positioning disk (3) and the guide block. A winding frame (7) is provided in the middle of the valve body. An excitation coil (11) is wound on the winding frame (7). A gap must be left between the outermost layer of the excitation coil (11) and the highest point of the winding frame (7). Epoxy resin (12) is applied to the outer layer of the excitation coil (11). The thickness of the epoxy resin (12) applied must not be greater than the thickness of the gap.

[0031] The left guide block (4) has a cylindrical protrusion (401) in the middle of the right end face, and the right guide block (8) has a central hole on the left end face. The cylindrical protrusion (401) on the right end of the left guide block (4) and the central hole on the left end of the right guide block (8) are interference fit. The outer circumferential surface of the guide block is in close contact with the inner circumferential surface of the winding frame (7). The side wall of the valve body has a second through hole (6) for leading out the coil on the excitation coil (11).

[0032] The first through hole on the end cap (1) is an internally threaded hole, used to connect with the external oil circuit.

[0033] The winding frame (7) is a hollow structure, and the winding concave platform is semi-circular in shape.

[0034] The winding frame (7), cylinder block (5), screw (9) and positioning pin (10) are made of DWSI3 silicon steel material, and the remaining parts are made of 7075 aluminum alloy with low density as non-magnetic material.

[0035] As Figure 2 shown, an improved low-energy single-coil magnetorheological valve provided by an embodiment of the present invention has multiple damping gaps, including two effective damping gaps. Specifically, an effective damping gap A is formed between the outer circumferential surface at the left end of the winding frame (7) and the inner circumferential surface of the cylinder block (5), and an effective damping gap B is formed between the outer circumferential surface at the right end of the winding frame (7) and the inner circumferential surface of the cylinder block (5). The magnetorheological fluid flows in from the P port, passes through multiple damping gaps, and finally flows out from the O port.

[0036] Refer Figure 1 and combine with Figures 3-4 , the structures are the left flow guide block (4) and the right flow guide block (8) of this embodiment respectively. Figure 3 shows the shape and characteristics of the left flow guide block (4). A central hole is opened in the middle of the left end face, and a cylindrical protrusion (401) is provided in the middle of the right end face. Figure 4 shows the shape and characteristics of the right flow guide block (8). Central holes are provided on both the left end face and the right end face. The cylindrical protrusion (401) at the right end of the left flow guide block (3) and the central hole at the left end of the right flow guide block (8) are in interference fit.

[0037] Refer Figure 1 and combine with Figure 5 , this structure is the cross-sectional view of the winding frame (7) of this embodiment. Figure 5 shows the shape and characteristics of the winding frame (7). Its internal structure is hollow, and the shape of the winding concave platform is semi-circular.

[0038] Working principle: When the magnetic induction line is perpendicular to the flow direction of the magnetorheological fluid, the dynamic viscosity of the magnetorheological fluid is the largest; when the magnetic field direction is parallel to the flow direction of the magnetorheological fluid, the dynamic viscosity of the magnetorheological fluid is the smallest. During normal operation, an electric current is applied to the excitation coil, and a magnetic field is generated under the excitation of the current. The winding frame, effective damping gap A, cylinder block and effective damping gap B form a magnetic field closed loop, and a magnetic field perpendicular to the liquid flow direction is formed in the effective damping gap A and effective damping gap B. By controlling the magnitude of the applied current, the magnitude of the magnetic field can be controlled, the dynamic viscosity of the magnetorheological fluid can be changed, and thus the resistance of the magnetorheological fluid flowing through the effective damping gaps A and B can be changed, and finally the purpose of regulating the pressure difference between the inlet and outlet of the valve can be achieved.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. An improved low-energy-consumption single-coil magnetorheological valve, characterized in that, The valve body includes a valve body with two end caps, two positioning discs, a left guide block, a cylinder, a winding frame, a right guide block, bolts, two positioning pins, an excitation coil, and epoxy resin arranged symmetrically from the outside to the inside at both ends. The end caps are fixedly connected to the cylinder by bolts, and a sealing ring is provided at the contact point between the end caps and the inner circumferential surface of the cylinder. The circumferential edge of the positioning disc abuts against the inner wall of the cylinder, and a first through hole for inserting a positioning pin is opened in its center. The positioning pin passes through the first through hole in the center of the positioning disc and mates with the center hole on the end face of the guide block, thus fixing the positioning disc and the guide block together. A hollow winding frame is provided in the middle of the valve body. The structure features a semi-circular winding platform; an excitation coil is wound on the winding frame, with a gap between the outermost layer of the excitation coil and the highest point of the winding frame; the outer layer of the excitation coil is coated with epoxy resin, the thickness of which must not exceed the gap thickness; a cylindrical protrusion is located in the middle of the right end face of the left guide block, and a central hole is located on the left end face of the right guide block; the cylindrical protrusion on the right end of the left guide block and the central hole on the left end of the right guide block are interference-fitted; the outer circumferential surfaces of the left and right guide blocks are tightly fitted to the inner circumferential surface of the winding frame; and a second through hole is provided on the side wall of the valve body for leading out the coil of the excitation coil.

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