A magnetic liquid sealing valve

Abstract

The present invention relates to a magnetic liquid sealing valve, which belongs to the field of valve technology and solves the technical problem that the sealing performance of valves in the prior art is relatively weak. It includes a valve body having a valve core and a shell; a sealing structure having a permanent magnetic component, a magnetic conductive component and a magnetic liquid; the magnetic conductive component has a magnetic conductive ring; the inner ring of the magnetic conductive ring protrudes toward the sealing side along its axial direction; and the inner ring surface N1 of the magnetic conductive ring has an angle a with the axis M of the valve core. The protruding structure and a certain angle of the magnetic conductive ring make the magnetic field lines more concentrated and orderly, ensuring that the magnetic liquid is arranged along the magnetic field lines and concentrated on the sealing side, forming a thicker and more uniform liquid sealing ring. The design of the magnetic conductive ring ensures that more magnetic liquid is guided to the sealing side, improves the thickness and uniformity of the liquid sealing ring, and enhances the sealing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, relates to a technology for improving valve sealing performance, and specifically relates to a magnetic liquid sealing valve. Background Art

[0002] Magnetic fluid sealing is a technology that uses the unique properties of magnetic fluid (also known as magnetic fluid) to achieve sealing functions. Magnetic fluid is a liquid composed of ultra-fine magnetic particles (usually ferrite or neodymium iron boron particles) suspended in a carrier fluid (such as oil or water). These magnetic particles are very small in diameter, usually around 10 nanometers.

[0003] Magnetic liquid seals achieve sealing by placing magnetic liquid in a magnetic field. The magnetic field is provided by a permanent magnet or an electromagnet, which causes the magnetic liquid to form a continuous liquid sealing ring in the sealing gap, thereby preventing gas or liquid leakage. The specific principle is as follows:

[0004] The magnetic particles in the magnetic fluid are evenly distributed in the carrier fluid. When a magnetic field is applied, these particles will align along the magnetic field lines to form a stable structure. In the sealing device, the magnetic fluid is introduced into the sealing gap and is subjected to the magnetic field. The magnetic field keeps the magnetic fluid stable in the sealing gap and forms a liquid ring to prevent leakage.

[0005] When magnetic liquid sealing technology is applied in the valve field, such as shut-off valves, switching valves or regulating valves, the pressure on the sealing side usually increases. At the moment the valve is opened or closed, the magnetic liquid will be subjected to a greater impact. Therefore, it is necessary to ensure the sealing performance of the magnetic liquid. On the other hand, for valves used in low-temperature environments, both the magnetic liquid and the carrier fluid will be affected, resulting in a significant decrease in sealing performance. Summary of the invention

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides a magnetic liquid sealing valve.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] Provided is a magnetic liquid sealing valve, comprising:

[0009] A valve body having a valve core and a housing;

[0010] A sealing structure having a permanent magnetic component, a magnetic conductive component and a magnetic liquid;

[0011] Furthermore, the sealing structure is arranged between the valve core and the housing;

[0012] Wherein, the permanent magnetic component is arranged between the magnetic conductive components;

[0013] The magnetic liquid is filled between the magnetic conductive component and the valve core;

[0014] Furthermore, the valve core is made of magnetic conductive material;

[0015] The magnetic conductive component has a magnetic conductive ring;

[0016] The inner ring of the magnetic conductive ring protrudes toward the sealing side along its axial direction;

[0017] Furthermore, an inner annular surface N1 of the magnetic conductive ring and an axis M of the valve core form an included angle a;

[0018] The angle a ranges from 30° to 60°.

[0019] Preferably, comprising a first sealing reinforcement portion;

[0020] The first sealing reinforcement portion is arranged along the inner annular surface N1;

[0021] Wherein, the first sealing reinforcement portion is configured to cause the surface area of ​​the inner annular surface N1 to change from S1 to S2;

[0022] Moreover, S2>S1.

[0023] Preferably, comprising a second sealing reinforcement portion;

[0024] The second sealing reinforcement portion is arranged on the end surface N2 of the magnetic conductive ring facing the sealing side;

[0025] The second sealing portion is configured to provide a plurality of physical anchor points on the end surface N2 for the magnetic liquid.

[0026] Preferably, a third sealing reinforcement portion is included;

[0027] The third sealing reinforcement portion is arranged on the end surface N3 of the magnetic conductive ring away from the sealing side;

[0028] The third sealing portion is configured to provide a plurality of physical anchor points on the end surface N3 for the magnetic liquid.

[0029] Preferably, comprising a buffer portion;

[0030] The buffer portion is arranged between the sealing side and the magnetic conductive ring;

[0031] Wherein, the end surface of the buffer portion facing the sealing side forms a flow diversion structure;

[0032] The cross section of the diversion structure is conical or quasi-conical.

[0033] Preferably, comprising a liquid hole;

[0034] The liquid hole is arranged on the magnetic conductive component;

[0035] Wherein, a chamber is formed between adjacent magnetic conductive rings;

[0036] Furthermore, the liquid hole is in communication with the chamber located at the head end or the tail end;

[0037] Wherein, the magnetic conductive ring is provided with a through hole;

[0038] The through hole connects the adjacent chambers.

[0039] Preferably, the valve core comprises a valve stem and a valve seat;

[0040] Wherein, the valve stem is provided with a storage groove;

[0041] The position of the storage slot corresponds to the position of the magnetic conductive ring.

[0042] Preferably, a fourth sealing reinforcement portion is included;

[0043] The fourth sealing reinforcement portion is disposed in the storage groove;

[0044] Wherein, the fourth sealing reinforcement portion is configured to cause the surface area of ​​the storage tank to change from S3 to S4;

[0045] Moreover, S4>S3.

[0046] Preferably, comprising a magnetic field strengthening disk;

[0047] The magnetic field reinforcement disk is arranged on both sides of the magnetic conductive component;

[0048] Wherein, the magnetic pole direction of the magnetic field reinforcement disk is opposite to the magnetic pole direction of the permanent magnet component.

[0049] Preferably, comprising a magnetic field isolation disk;

[0050] The magnetic field isolation disk is arranged between the magnetic conductive component and the magnetic field strengthening disk;

[0051] Furthermore, the magnetic field isolation disk is made of low magnetic permeability material.

[0052] The present invention provides a magnetic liquid sealing valve, and the beneficial effects of the present invention are embodied in:

[0053] The protruding structure and certain angle of the magnetic ring make the magnetic field lines more concentrated and orderly, ensuring that the magnetic liquid is arranged along the magnetic field lines and concentrated on the sealing side, forming a thicker and more uniform liquid sealing ring. The design of the magnetic ring ensures that more magnetic liquid is guided to the sealing side, increasing the thickness and uniformity of the liquid sealing ring and enhancing the sealing effect.

[0054] By increasing the amount of magnetic liquid on the sealing side, a liquid seal ring capable of withstanding higher pressure is formed, solving the problem that traditional sealing structures are prone to failure under high pressure conditions. The distribution of more magnetic liquid on the sealing side forms a uniform and fully covered liquid barrier that effectively resists external pressure and impact.

[0055] The thick and uniform liquid sealing ring formed by the magnetic liquid on the sealing side can more effectively prevent the medium (such as water or gas) from escaping through the sealing gap, ensuring the stability and reliability of the sealing structure.

[0056] The valve is suitable for harsh environments such as high pressure, high speed and low temperature. Through optimized design, the problem that traditional magnetic liquid seals are prone to failure under these conditions is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 The magnetic liquid sealing valve proposed by the present invention is a three-dimensional diagram of a cut-off valve;

[0058] Figure 2 for Figure 1 a cross-sectional view of the structure shown;

[0059] Figure 3 The magnetic liquid sealing valve proposed by the present invention is a three-dimensional diagram of a self-operated regulating valve;

[0060] Figure 4 for Figure 3 a cross-sectional view of the structure shown;

[0061] Figure 5 The magnetic liquid sealing valve proposed by the present invention is a three-dimensional diagram of a stop valve;

[0062] Figure 6 for Figure 5 a cross-sectional view of the structure shown;

[0063] Figure 7 A structural diagram of the sealing structure in the magnetic liquid sealing valve proposed by the present invention;

[0064] Figure 8 for Figure 7 A local enlarged schematic diagram at point A;

[0065] Fig. 9 This is a structural schematic diagram of the sealing structure and the buffer part in the magnetic liquid sealing valve proposed by the present invention;

[0066] Fig.10 for Fig. 9 a cross-sectional view of the structure shown;

[0067] Fig.11 This is one of the three-dimensional diagrams of the magnetic conductive ring in the magnetic liquid sealing valve proposed by the present invention;

[0068] Fig.12 This is the second stereoscopic view of the magnetic conductive ring in the magnetic liquid sealing valve proposed by the present invention.

[0069] Description of reference numerals:

[0070] 1. Valve body; 101. Valve core; 102. Shell; 201. Permanent magnetic component; 202. Magnetic conductive component; 203. Magnetic liquid; 204. Magnetic conductive ring; 3. First sealing reinforcement part; 4. Second sealing reinforcement part; 5. Third sealing reinforcement part; 6. Buffer part; 601. Diversion structure; 701. Liquid hole; 702. Through hole; 703. Chamber; 8. Storage tank; 9. Fourth sealing reinforcement part; 10. Magnetic field reinforcement disk; 11. Magnetic field isolation disk. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] See also Figures 1 to 12 As shown, the specific embodiments provided by the present invention are as follows:

[0073] like Figures 7 to 12 As shown, the first embodiment of the present invention provides a magnetic liquid 203 sealing valve, comprising:

[0074] A valve body 1 having a valve core 101 and a housing 102;

[0075] A sealing structure having a permanent magnetic component 201, a magnetic conductive component 202 and a magnetic liquid 203;

[0076] Furthermore, the sealing structure is disposed between the valve core 101 and the housing 102;

[0077] Wherein, the permanent magnetic component 201 is arranged between the magnetic conductive components 202;

[0078] The magnetic liquid 203 is filled between the magnetic conductive component 202 and the valve core 101;

[0079] Furthermore, the valve core 101 is made of magnetic conductive material;

[0080] The magnetic conductive component 202 has a magnetic conductive ring 204;

[0081] The inner ring of the magnetic conductive ring 204 protrudes toward the sealing side along its axial direction;

[0082] Furthermore, an inner annular surface N1 of the magnetic conductive ring 204 and an axis M of the valve core 101 form an included angle a;

[0083] The angle a ranges from 30° to 60°.

[0084] In this embodiment, the sealing structure is used for sealing between the valve core 101 and the housing 102, so as to prevent the medium on the pressure side, such as water or gas, from escaping from this position.

[0085] The permanent magnetic component 201 is a permanent magnet, and the magnetic conductive component 202 is a component made of a high magnetic conductive material.

[0086] The permanent magnetic component 201 and the magnetic conductive component 202 are fixed on the housing 102, and the magnetic conductive component 202 is arranged on both sides of the permanent magnetic component 201 and in contact with the permanent magnetic component 201, so as to effectively conduct the magnetic field generated by the permanent magnetic component 201 to the sealing area where the magnetic liquid 203 is located. Under the guidance of the magnetic conductive component 202, the magnetic field can form a stable magnetic field line in the sealing area, so that the magnetic liquid 203 is arranged along the magnetic field line, thereby achieving a stable sealing effect.

[0087] Among them, a magnetic conductive ring 204 is added, and the magnetic conductive ring 204 is integrally formed with the magnetic conductive component 202, and there are a plurality of magnetic conductive rings 204. The plurality of magnetic conductive rings 204 are arranged along a certain interval. In order to improve the sealing performance of the magnetic liquid 203, the purpose of this embodiment is to enable more magnetic liquid 203 to be guided to the sealing side, thereby ensuring that a larger amount of magnetic liquid 203 forms a liquid sealing ring on the sealing side that can resist a certain pressure.

[0088] Therefore, the magnetic ring 204 is a structure that protrudes toward the sealing side, so that its inner ring surface N1 is no longer horizontal with the axis M of the valve core 101, but presents a state with a certain angle a. The advantages of this arrangement are:

[0089] The protruding structure of the magnetic conductive ring 204 makes the magnetic field lines more concentrated and more directional. Under the action of the magnetic field lines, the magnetic liquid 203 can be arranged more orderly and concentrated on the sealing side, thereby forming a thicker and more uniform liquid sealing ring.

[0090] Since the magnetic liquid 203 is guided by the magnetic field, more magnetic liquid 203 is guided to the sealing side, which not only increases the thickness of the liquid sealing ring, but also ensures that the magnetic liquid 203 is fully covered on the sealing side, thereby enhancing the sealing effect.

[0091] The traditional sealing structure is prone to sealing failure under high pressure conditions, but this design can form a liquid sealing ring that can withstand higher pressure by increasing the amount of magnetic liquid 203 on the sealing side. The thickness and uniformity of the magnetic liquid 203 directly determine its pressure resistance. Through the protruding design of the magnetic ring 204, the magnetic liquid 203 can more effectively resist external pressure.

[0092] The distribution of more magnetic liquid 203 on the sealing side forms a more effective barrier to prevent the medium (such as water or gas) from escaping through the sealing gap. Especially in high pressure or impact environment, this design can ensure the stability and reliability of the sealing structure.

[0093] As a result, the valve is more suitable for harsh environments such as high pressure, high speed and low temperature, and the problem that the traditional magnetic liquid 203 seal is prone to failure under these conditions is solved.

[0094] In a specific embodiment, the angle a is in the range of 30° to 60°, preferably 45°. The design of the angle a plays a vital role in the magnetic liquid 203 sealing valve, which is specifically manifested in the following aspects:

[0095] The angle a makes the inner surface of the magnetic ring 204 no longer parallel to the axis of the valve core 101, but tilted at a certain angle. This tilted design can effectively concentrate the magnetic field lines, making the magnetic field more concentrated and powerful on the sealing side.

[0096] The concentrated magnetic field can better guide the magnetic liquid 203 to form a stable and continuous liquid ring on the sealing side. Compared with the horizontal magnetic ring 204, the design of the inclined angle can avoid magnetic field dispersion and improve the utilization rate of the magnetic field.

[0097] Due to the concentration and enhancement of the magnetic field lines, the magnetic liquid 203 can be arranged more orderly under the action of the magnetic field and guided to the sealing side. This guiding effect can ensure that more magnetic liquid 203 gathers on the sealing side to form a thick liquid sealing ring.

[0098] The design of the angle a enables the magnetic liquid 203 to form a thicker liquid layer on the sealing side, thereby enhancing the sealing performance. In a high-pressure environment, this design can effectively resist external pressure and prevent the medium from overflowing.

[0099] The magnetic liquid 203 tends to be squeezed to a lower pressure area under high pressure. The angle a enables the magnetic liquid 203 to maintain a stable arrangement and distribution under high pressure, thereby enhancing the pressure resistance of the sealing ring.

[0100] The angle a enables the inner surface of the magnetic ring 204 to form an inclined flow-guiding channel, and the magnetic liquid 203 flows and gathers along this channel, which can effectively prevent the medium from overflowing through the sealing gap.

[0101] In dynamic sealing applications, such as during the opening and closing of a valve, the magnetic fluid 203 can quickly adjust and restore its position and shape under the guidance of the tilt angle to ensure the continuity and effectiveness of the seal.

[0102] In addition, the design of angle a helps to optimize the stress distribution in the sealing structure. The inclined inner ring surface can disperse the external pressure more evenly throughout the sealing structure, reduce local stress concentration, and avoid structural deformation or damage. By optimizing the stress distribution, the service life of the sealing structure can be extended, the maintenance and replacement frequency can be reduced, and the reliability of the system can be improved.

[0103] The angle a is preferably 45° in order to achieve a good balance between magnetic field concentration and liquid guidance. The angle of 45° can fully utilize the guiding effect of the magnetic field while avoiding excessive concentration or dispersion of the magnetic field lines caused by excessive tilt.

[0104] This optimization angle not only takes into account the rationality of theoretical design, but also combines the performance in practical applications, and has high practicality and reliability.

[0105] like Figures 1 to 6 As shown, it should be noted that the valves provided in this embodiment include cut-off valves, self-operated regulating valves, stop valves, butterfly valves and gate valves.

[0106] like Figure 8 As shown, the second embodiment of the present invention provides a magnetic liquid 203 sealing valve, and on the basis of the first embodiment, includes a first sealing reinforcement part 3;

[0107] The first sealing reinforcement portion 3 is arranged along the inner annular surface N1;

[0108] Wherein, the first sealing reinforcement portion 3 is configured to cause the surface area of ​​the inner annular surface N1 to change from S1 to S2;

[0109] Moreover, S2>S1.

[0110] In this embodiment, the first sealing reinforcement portion 3 is used to increase the connection area between the magnetic liquid 203 and the inner annular surface N1.

[0111] Since the magnetic liquid 203 has a certain fluidity, it can be filled into the first sealing reinforcement part 3 to increase the connection area with the inner annular surface N1. The advantages of this arrangement are:

[0112] The design of the first seal reinforcement part 3 increases the connection area between the magnetic liquid 203 and the inner annular surface N1, thereby enhancing the adhesion of the magnetic liquid 203 on the sealing side. A larger connection area can provide a stronger magnetic attraction force, making the magnetic liquid 203 more stable on the sealing side.

[0113] As the contact area between the magnetic liquid 203 and the inner ring surface N1 increases, the thickness and stability of the liquid sealing ring also increase. This design can effectively prevent the high-pressure medium from overflowing from the sealing gap and ensure the reliable sealing of the valve under high-pressure conditions.

[0114] In a specific embodiment, the first sealing reinforcement part 3 may be formed by designing a plurality of grooves or microstructures on the inner annular surface N1 . These grooves or microstructures not only increase the surface area, but also form more physical anchor points, further enhancing the stability of the magnetic liquid 203 .

[0115] In a specific implementation, a specific surface treatment (such as etching or coating) is performed on the inner annular surface N1 to increase the surface roughness and area, thereby improving the adhesion effect of the magnetic liquid 203 .

[0116] Therefore, the design of the first seal reinforcement part 3 enables the magnetic fluid 203 to better adapt to the opening and closing operations of the valve. During the dynamic operation of the valve, since the connection between the magnetic fluid 203 and the inner annular surface N1 is more firm, the first seal reinforcement part 3 can improve the impact resistance of the entire sealing structure and prevent the magnetic fluid 203 from being impacted and failing at the moment of opening or closing the valve.

[0117] Through the above design and optimization, the second embodiment of the present invention improves the sealing performance of the magnetic liquid 203 sealing valve while enhancing the stability and durability of the system, especially under high pressure and dynamic operating conditions, showing significant advantages and effects. This innovative design makes the magnetic liquid 203 sealing valve have a wider applicability and higher reliability in practical applications.

[0118] like Figure 8 and Fig.12 As shown, the third embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a second sealing reinforcement part 4;

[0119] The second sealing reinforcement portion 4 is disposed on the end surface N2 of the magnetic conductive ring 204 facing the sealing side;

[0120] The second sealing portion is configured to provide a plurality of physical anchor points on the end surface N2 for the magnetic liquid 203 .

[0121] In this embodiment, the second sealing reinforcement part 4 provides several physical anchor points on the end surface N2 of the magnetic conductive ring 204. These anchor points can be convex, concave or tiny protrusion structures to enhance the adhesion of the magnetic liquid 203 on the end surface N2.

[0122] The anchor points may be arranged regularly or randomly distributed, and the specific shapes and sizes may be optimized according to actual needs to ensure the stability of the magnetic liquid 203 under different working conditions.

[0123] By adding physical anchor points on the end surface N2, the adhesion of the magnetic liquid 203 in this area is significantly improved. This design can effectively prevent the magnetic liquid 203 from being squeezed out of the sealing area under high pressure or high impact conditions. The physical anchor points provide additional mechanical fixing, making the magnetic liquid 203 more stable on the end surface N2, effectively enhancing the sealing performance of the entire sealing system.

[0124] On the other hand, the physical anchor point can absorb some of the impact force when the valve is opened and closed, reduce the movement and loss of the magnetic liquid 203, and ensure the stability of the sealing effect. The anchor point structure can also play a certain role in shock absorption, especially in a high-frequency vibration environment, and can stabilize the magnetic liquid 203 to prevent its sealing failure caused by vibration.

[0125] In a specific implementation, the physical anchor point is a tiny anchor point designed on the end surface N2, and the shape of the anchor point can be cylindrical, conical or other structures suitable for enhancing adhesion.

[0126] The height and spacing of the anchor points are optimized according to the sealing requirements and the characteristics of the magnetic liquid 203 to ensure the best adhesion and stability during the sealing process.

[0127] In a specific embodiment, the physical anchor points include grooves and protrusions to increase the surface area and diversity of the physical anchor points, further improving the adhesion and stability of the magnetic liquid 203.

[0128] like Figure 8 and Fig.11 As shown, the fourth embodiment of the present invention provides a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a third sealing reinforcement part 5;

[0129] The third sealing reinforcement portion 5 is disposed on the end surface N3 of the magnetic conductive ring 204 away from the sealing side;

[0130] The third sealing portion is configured to provide a plurality of physical anchor points on the end surface N3 for the magnetic liquid 203 .

[0131] In this embodiment, the third sealing reinforcement part 5 introduces a special surface texture, i.e., a physical anchor point, on the end surface N3 of the magnetic ring 204. These textures may include tiny grooves, protrusions, ripples, or other forms of fine structures to enhance the adhesion of the magnetic liquid 203 on the end surface N3. By adding surface texture to the end surface N3, the adhesion of the magnetic liquid 203 in this area is significantly improved. This design can effectively prevent the magnetic liquid 203 from being squeezed out of the sealing area under high pressure or high impact conditions. The surface texture provides an additional mechanical fixing effect, making the magnetic liquid 203 more stable on the end surface N3, and effectively enhancing the sealing performance of the entire sealing system.

[0132] In addition, the surface texture can absorb some of the impact force when the valve is opened and closed, reduce the movement and loss of the magnetic liquid 203, and ensure the stability of the sealing effect. The texture structure can play a certain shock-absorbing role, especially in a high-frequency vibration environment, and can stabilize the magnetic liquid 203 to prevent its sealing failure caused by vibration.

[0133] The surface texture can be manufactured through precision machining processes such as CNC machining, laser etching or chemical etching to ensure the accuracy of its shape and size.

[0134] Furthermore, the magnetic ring 204 and the surface texture can be made of high magnetic permeability materials and surface treated to enhance the wear resistance and corrosion resistance and extend the service life.

[0135] like Fig.10 As shown, the fifth embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a buffer part 6;

[0136] The buffer portion 6 is disposed between the sealing side and the magnetic conductive ring 204;

[0137] Wherein, the end surface of the buffer portion 6 facing the sealing side forms a flow diversion structure 601;

[0138] The cross section of the diversion structure 601 is conical or quasi-conical.

[0139] In this embodiment, the end surface of the buffer portion 6 facing the sealing side forms a flow-dividing structure 601, and the cross section of the flow-dividing structure 601 is conical or quasi-conical. The conical design can effectively guide the fluid, reduce flow resistance and impact. The flow-dividing structure 601 can evenly disperse the fluid, avoid the fluid from concentrating on a certain position on the sealing side, and thus reduce the disturbance and impact force on the magnetic liquid 203.

[0140] In addition, the buffer part 6 can effectively absorb the impact force generated during the flow of the fluid through its diversion structure 601, protecting the sealing layer of the magnetic liquid 203 from damage. The buffer part 6 can also reduce the direct impact of the fluid on the sealing side, so that the magnetic liquid 203 maintains a stable arrangement and distribution, thereby enhancing the sealing effect.

[0141] Specifically, the buffer portion 6 can be made of wear-resistant and corrosion-resistant materials, such as polymer materials or metal materials, and surface treatment is performed to enhance its durability.

[0142] On the one hand, a conical buffer portion 6 is provided between the sealing side and the magnetic conductive ring 204, with the apex of the buffer portion 6 facing the fluid flow direction and the bottom facing the sealing side. The height and angle of the conical buffer portion 6 are optimized according to the fluid flow rate and pressure to ensure the best flow diversion and buffering effect.

[0143] On the other hand, the conical buffer portion 6 can adopt a multi-stage gradual change design to make the fluid flow more stable and further reduce the impact on the sealing structure. The angle and length of each section of the conical structure are adjusted according to specific application requirements to achieve the best buffering effect.

[0144] In addition, a multi-layer buffer structure may be provided between the sealing side and the magnetic conductive ring 204 , with each layer having a different diversion angle and height, thereby forming a more complex diversion path and further enhancing the buffer effect.

[0145] like Fig.10 As shown, the sixth embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a liquid hole 701 and a through hole 702;

[0146] The liquid hole 701 is disposed in the magnetic conductive component 202, wherein a chamber 703 is formed between adjacent magnetic conductive rings 204; and the liquid hole 701 is connected to the chamber 703 located at the head end or the tail end. The magnetic conductive ring 204 is provided with a through hole 702, and the through hole 702 connects adjacent chambers 703.

[0147] In this embodiment, the liquid hole 701 is used to inject the magnetic liquid 203 into the chamber 703 of the magnetic conductive component 202. By providing the liquid hole 701 at the head end or the tail end, the magnetic liquid 203 can be easily injected into the sealing structure.

[0148] The liquid hole 701 is designed to be of appropriate size and shape, so as to accurately control the injection amount of the magnetic liquid 203 and ensure that the amount of the magnetic liquid 203 in each chamber 703 is evenly distributed.

[0149] The through hole 702 connects the adjacent chambers 703, so that the magnetic liquid 203 can flow freely between the chambers 703, ensuring that the magnetic liquid 203 can fill each chamber 703. Through the through hole 702, the magnetic liquid 203 can be evenly distributed in all the chambers 703, and finally guided to the inner ring surface N1 of the magnetic ring 204, thereby forming a stable liquid sealing ring.

[0150] In addition, in the prior art, pouring the magnetic liquid 203 into the sealing part is a difficult problem. The main reason is that the high viscosity of the magnetic liquid 203 and the guidance of the magnetic field make it difficult to evenly pour it into the sealing structure.

[0151] This embodiment can effectively solve this problem by providing a liquid hole 701 and a through hole 702. The liquid hole 701 provides a convenient injection point, and the through hole 702 ensures that the magnetic liquid 203 can flow freely between the chambers 703, avoiding the uneven distribution problem caused by high viscosity and magnetic field guidance.

[0152] Specifically, a liquid hole 701 is provided at the head end or the tail end of the magnetic conductive component 202 , and the diameter and position of the liquid hole 701 are designed according to specific application requirements to ensure that the magnetic liquid 203 can be easily injected.

[0153] The liquid hole 701 is equipped with a sealing device, such as a valve or a plug, to close the liquid hole 701 after the magnetic liquid 203 is injected to prevent the liquid from leaking.

[0154] A through hole 702 is provided between each magnetic conductive ring 204 , and the diameter and spacing of the through holes 702 are designed according to the size of the chamber 703 and the flow characteristics of the magnetic liquid 203 to ensure that the liquid can flow smoothly.

[0155] The positions and number of the through holes 702 are optimized through experiments to ensure that the magnetic liquid 203 is evenly distributed in all chambers 703 .

[0156] like Figure 8 As shown, the seventh embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, the valve core 101 includes a valve stem and a valve seat;

[0157] Wherein, the valve stem is provided with a storage slot 8;

[0158] The position of the storage slot 8 corresponds to the position of the magnetic conductive ring 204 .

[0159] In this embodiment, the storage groove 8 is used to store additional magnetic liquid 203. By providing the storage groove 8 on the valve stem, the magnetic liquid 203 can be replenished to the sealing area when needed, thereby ensuring the durability and reliability of the sealing performance.

[0160] The position of the storage groove 8 corresponds to the position of the magnetic guide ring 204 , so that during the flow and distribution of the magnetic liquid 203 , the storage groove 8 can directly replenish the magnetic liquid 203 to the inner ring surface N1 of the magnetic guide ring 204 .

[0161] Specifically, during the operation of the valve (such as opening and closing), the magnetic liquid 203 in the storage tank 8 can be dynamically replenished to the sealing area as needed to maintain a stable liquid sealing ring. The storage tank 8 can ensure that the supply of the magnetic liquid 203 will not be interrupted under high pressure or high frequency operating conditions, thereby maintaining a stable sealing effect.

[0162] In a specific embodiment, one or more storage grooves 8 are designed on the valve stem, and the size and position of the storage groove 8 are designed according to the position of the magnetic ring 204 and the demand for the magnetic liquid 203 to ensure that sufficient magnetic liquid 203 can be provided. The position of the storage groove 8 corresponds to the position of the magnetic ring 204, so that during the flow of the magnetic liquid 203, it can be directly supplemented to the inner ring surface N1 of the magnetic ring 204 to ensure that the magnetic liquid 203 in the sealing area is sufficient.

[0163] like Figure 8 As shown, the eighth embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a fourth sealing reinforcement part 9;

[0164] The fourth sealing reinforcement portion 9 is disposed in the storage groove 8;

[0165] Wherein, the fourth sealing reinforcement portion 9 is configured to cause the surface area of ​​the storage groove 8 to change from S3 to S4;

[0166] Moreover, S4>S3.

[0167] In this embodiment, by designing the fourth sealing reinforcement part 9 on the storage tank 8, the surface area of ​​the storage tank 8 can be significantly increased, thereby increasing the adhesion area of ​​the magnetic liquid 203. A larger surface area can provide a stronger magnetic attraction, making the magnetic liquid 203 more stable in the storage tank 8.

[0168] The design of the fourth sealing reinforcement portion 9 can increase the total surface area by increasing the complexity of the inner surface of the groove, such as adding tiny grooves, protrusions or texture structures.

[0169] The fourth sealing reinforcement part 9 is a plurality of tiny grooves and protrusions designed on the inner surface of the storage tank 8 . These structures can significantly increase the surface area of ​​the storage tank 8 and enhance the adhesion of the magnetic liquid 203 .

[0170] The fourth sealing reinforcement part 9 introduces complex texture structures, such as corrugations or grids, to the surface of the storage tank 8, which can further increase the surface area and provide more physical anchor points to improve the stability of the magnetic liquid 203. It ensures that the grooves, protrusions and texture structures are evenly distributed in the storage tank 8 to avoid insufficient surface area in local areas, thereby ensuring the uniform distribution and stability of the magnetic liquid 203.

[0171] like Figure 7 As shown, the ninth embodiment of the present invention proposes a magnetic liquid 203 sealing valve, and on the basis of the previous embodiment, includes a magnetic field strengthening disk 10;

[0172] The magnetic field strengthening disk 10 is disposed on both sides of the magnetic conductive component 202;

[0173] The magnetic pole direction of the magnetic field reinforcement disk 10 is opposite to the magnetic pole direction of the permanent magnet component 201 .

[0174] In this embodiment, since the magnetic pole direction of the magnetic field reinforcing disk 10 is opposite to the magnetic pole direction of the permanent magnetic component 201, this arrangement will generate an axial magnetic field gradient in the sealing area. Specifically, the magnetic field gradient will exert a force on the magnetic particles in the magnetic liquid 203, causing them to move along the direction of the magnetic field change. This force can make the magnetic liquid 203 concentrate from both sides to the middle, forming a thicker and more uniform sealing ring.

[0175] By controlling the magnetic field gradient, a stable magnetic field can be formed in the sealing area, so that the magnetic liquid 203 is evenly distributed in the sealing area, thereby enhancing the sealing effect. In addition, the axial magnetic field gradient can exert a force from both sides to the middle on the magnetic liquid 203, thereby concentrating the magnetic liquid 203 in the middle.

[0176] In addition, to avoid magnetic field interference, a magnetic field shielding material, namely a magnetic field isolation disk 11, can be provided between the magnetic field reinforcement disk 10 and the permanent magnetic component 201. Such a magnetic field isolation disk 11 can reduce interference between opposite magnetic fields and ensure that the magnetic field is concentrated in the sealing area.

[0177] The magnetic field isolation disk 11 is made of low magnetic permeability material to effectively reduce magnetic field guidance interference, ensure that the magnetic field is concentrated in the sealing area, and enhance the stability and sealing performance of the magnetic liquid 203.

[0178] In the description of the embodiments of the present invention, it needs to be understood that terms such as “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “center”, “top”, “bottom”, “top”, “bottom”, “inside”, “outside”, “inside”, and “outside” indicate orientation or positional relationships.

[0179] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0180] In the description of the embodiments of the present invention, it is to be understood that “-” and “~” represent a range between two values, and the range includes the endpoints. For example, “AB” represents a range greater than or equal to A and less than or equal to B. “A~B” represents a range greater than or equal to A and less than or equal to B.

[0181] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0182] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic liquid sealing valve, characterized in that: include: A valve body having a valve core and a housing; A sealing structure having a permanent magnetic component, a magnetic conductive component and a magnetic liquid; Furthermore, the sealing structure is arranged between the valve core and the housing; Wherein, the permanent magnetic component is arranged between the magnetic conductive components; The magnetic liquid is filled between the magnetic conductive component and the valve core; Furthermore, the valve core is made of magnetic conductive material; The magnetic conductive component has a magnetic conductive ring; The inner ring of the magnetic conductive ring protrudes toward the sealing side along its axial direction; Furthermore, an inner annular surface N1 of the magnetic conductive ring and an axis M of the valve core form an included angle a; Wherein, the value range of angle a is 30° to 60°; comprising a first sealing reinforcement portion; The first sealing reinforcement portion is arranged along the inner annular surface N1; Wherein, the first sealing reinforcement portion is configured to cause the surface area of ​​the inner annular surface N1 to change from S1 to S2; Moreover, S2>S1.

2. The magnetic liquid sealing valve according to claim 1, characterized in that: including a second sealing reinforcement portion; The second sealing reinforcement portion is arranged on the end surface N2 of the magnetic conductive ring facing the sealing side; The second sealing portion is configured to provide a plurality of physical anchor points on the end surface N2 for the magnetic liquid.

3. The magnetic liquid sealing valve according to claim 2, characterized in that: including a third sealing reinforcement portion; The third sealing reinforcement portion is arranged on the end surface N3 of the magnetic conductive ring away from the sealing side; The third sealing portion is configured to provide a plurality of physical anchor points on the end surface N3 for the magnetic liquid.

4. The magnetic liquid sealing valve according to claim 1, characterized in that: including a buffer portion; The buffer portion is arranged between the sealing side and the magnetic conductive ring; Wherein, the end surface of the buffer portion facing the sealing side forms a flow diversion structure; The cross section of the diversion structure is conical or quasi-conical.

5. The magnetic liquid sealing valve according to claim 1, characterized in that: including a liquid hole; The liquid hole is arranged on the magnetic conductive component; Wherein, a chamber is formed between adjacent magnetic conductive rings; Furthermore, the liquid hole is in communication with the chamber located at the head end or the tail end; Wherein, the magnetic conductive ring is provided with a through hole; The through hole connects the adjacent chambers.

6. The magnetic liquid sealing valve according to claim 1, characterized in that: The valve core includes a valve stem and a valve seat; Wherein, the valve stem is provided with a storage groove; The position of the storage slot corresponds to the position of the magnetic conductive ring.

7. The magnetic liquid sealing valve according to claim 6, characterized in that: including a fourth sealing reinforcement portion; The fourth sealing reinforcement portion is disposed in the storage groove; Wherein, the fourth sealing reinforcement portion is configured to cause the surface area of ​​the storage tank to change from S3 to S4; Moreover, S4>S3.

8. The magnetic liquid sealing valve according to claim 1, characterized in that: including a magnetic field strengthening disk; The magnetic field reinforcement disk is arranged on both sides of the magnetic conductive component; Wherein, the magnetic pole direction of the magnetic field reinforcement disk is opposite to the magnetic pole direction of the permanent magnet component.

9. The magnetic liquid sealing valve according to claim 8, characterized in that: including a magnetic field isolation disk; The magnetic field isolation disk is arranged between the magnetic conductive component and the magnetic field strengthening disk; Furthermore, the magnetic field isolation disk is made of low magnetic permeability material.

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