A cage-type giant magnetostrictive proportional valve for electric propulsion

Abstract

The invention provides a cage-type giant magnetostrictive proportional valve for electric propulsion, comprising: a valve body, a shell, a valve core, a cage-type bracket, a magnetic field control component and a giant magnetostrictive rod. The valve body has an air inlet and an air outlet that are connected to each other, the shell is connected to the valve body to form an internal space, and the valve core, the cage-type bracket, the magnetic field control component and the giant magnetostrictive rod are all arranged in the internal space. The valve core is sealed and connected to the valve body, so that the valve core and the air inlet and the air outlet form a ventilation flow channel. The tip of the sealing end of the valve core extends into the air outlet to form a seal of the ventilation flow channel. One axial end of the cage-type bracket is connected to the shell, and the other end is connected to the valve core. The magnetic field control component is arranged on the periphery of the cage-type bracket, and the giant magnetostrictive rod is arranged inside the cage-type bracket. The magnetic field direction of the giant magnetostrictive rod is changed by the magnetic field control component, so that the giant magnetostrictive rod drives the cage-type bracket and the valve core away from the valve body, so that the tip of the valve core forms a rated gap with the air outlet, thereby realizing proportional control of the valve opening.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a cage-type giant magnetostrictive proportional valve used for electric propulsion. Background Art

[0002] Electric propulsion has the characteristics of high specific impulse, long life, and precise and adjustable working mode. It is used in the fields of high-precision attitude and orbit control maneuvers and orbit transfer of spacecraft. During its on-orbit period, it has high-precision and wide-range proportional control requirements for the propellant flow. Therefore, the proportional valve used in electric propulsion needs to meet the flow control requirements of electric propulsion, and it is necessary to realize the proportional control of the valve with high precision to reduce the error in the proportional valve control process.

[0003] The giant magnetostrictive proportional valves currently used in electric propulsion are generally large in size and are prone to problems such as waste of telescopic stroke or leakage on the sealing surface. Therefore, there is an urgent need to provide a giant magnetostrictive proportional valve with high adjustment accuracy. Summary of the invention

[0004] In view of the above technical problems in the related art, the present invention provides a cage-type giant magnetostrictive proportional valve, which uses a permanent magnetic bias to pre-extend the giant magnetostrictive rod, and uses a cage-type structure to provide a pre-tightening force for the giant magnetostrictive rod to achieve sealing of the valve core and the valve seat. The cage-type structure can also adapt to the length change of the giant magnetostrictive rod. The cage-type giant magnetostrictive proportional valve of the present invention has the advantages of easy installation, high precision, high power utilization rate and good robustness.

[0005] The invention provides a cage-type giant magnetostrictive proportional valve, comprising a valve body, a shell, a valve core, a cage-type bracket, a magnetic field control component and a giant magnetostrictive rod; the valve body has an air inlet and an air outlet that are connected to each other, the shell is connected to the valve body to form an internal space, and the valve core, the cage-type bracket, the magnetic field control component and the giant magnetostrictive rod are all arranged in the internal space; one end of the valve core is circumferentially sealed with the valve body, so that the valve core and the air inlet and the air outlet form a ventilation flow channel; the end surface of the valve core close to one end of the valve body has a tip portion, and the tip portion is used to extend into the air outlet to form a seal of the ventilation flow channel; one axial end of the cage-type bracket is connected to the inner wall of the shell, and the other end is connected to one end of the valve core away from the valve body; the magnetic field control component is arranged on the periphery of the cage-type bracket, and the giant magnetostrictive rod is arranged inside the cage bracket.

[0006] The magnetic field control component changes the direction of the magnetic field passing through the giant magnetostrictive rod, so that the giant magnetostrictive rod drives the cage bracket to axially contract, and drives the valve core to move away from the valve body, so that the tip part of the valve core forms a rated gap with the air outlet, thereby realizing proportional control of the valve opening.

[0007] In one embodiment, a spiral groove is provided on the circumferential surface of the cage bracket; the spiral groove can realize elastic expansion and contraction of the cage bracket.

[0008] In one embodiment, the magnetic field control component includes: a winding skeleton, a permanent magnet and a winding arranged on the periphery of the cage bracket; one axial end of the winding skeleton is connected to the inner wall of the shell, and the other end is arranged close to the valve core; the winding is wound on the outer annular surface of the winding skeleton; wherein a first boss is provided at one radially inner end of the winding skeleton, and a second boss is provided at one radially outer end of the cage bracket away from the first boss; the permanent magnet is axially movably arranged between the first boss and the second boss.

[0009] In one embodiment, in the radial direction, the outer wall of the permanent magnet is closely disposed to the inner wall of the winding frame, and the inner wall of the permanent magnet is spaced apart from the outer wall of the cage bracket.

[0010] In one embodiment, the cage bracket is fixed to the shell through a base; the cage bracket is welded to one side of the base, and the other side of the base is fixed to the inner wall of the shell.

[0011] In one embodiment, the air outlet of the valve body is a conical hole surface that matches the tip of the valve core, and a sealing gasket that matches the tip portion is also provided in the conical hole surface; the inclination of the conical hole surface is consistent with the inclination of the tip portion of the valve core.

[0012] In one embodiment, an annular sealing groove is provided at a position where the circumferential inner side of the valve body is sealed with the valve core, and an O-ring is provided in the annular sealing groove.

[0013] In one embodiment, a flange structure is further provided on the circumferential outer side between the two axial ends of the valve core; the radial outer side of the flange structure is spaced apart from the inner wall of the shell; the axial end face of the flange structure is spaced apart from the valve body, and the other axial end face is spaced apart from the winding skeleton.

[0014] In one embodiment, a winding outlet hole is further provided on the circumferential surface of the shell; after the winding is wound on the winding frame and tied tightly, it extends out along the winding outlet hole to be connected to an external circuit.

[0015] In one embodiment, one end of the valve core away from the valve body is screwed into the cage bracket.

[0016] A cage-type giant magnetostrictive proportional valve according to an embodiment of the present invention utilizes a permanent magnet bias to pre-stretch the giant magnetostrictive rod, thereby solving the problems of cumbersome structural transmission, large cumulative error in displacement transmission, and invalid travel of the giant magnetostrictive rod. The cage-type structure not only meets the pre-tightening force requirement of the giant magnetostrictive rod, but also realizes the rigid connection with the valve core and the sealing function between the valve core and the sealing surface. No other elastic elements are required, which reduces the volume of the giant magnetostrictive proportional valve, optimizes the overall structure, and makes installation easier. At the same time, the adjustment accuracy, adjustment range, and robustness of the giant magnetostrictive proportional valve are also significantly improved. At the same time, the magnetic circuit layout of the proportional valve of the present invention can form a better circuit with less magnetic loss, which significantly improves the utilization rate of electric energy.

[0017] Those skilled in the art will recognize additional features and advantages upon reading the detailed description and upon viewing the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Schematic diagram of the overall structure of a cage-type giant magnetostrictive proportional valve according to an embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the magnetic field control component part of an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the valve core tip portion and the valve body air outlet according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific embodiments. Spatial relationship terms such as "below", "below", "under...", "low", "above", "on...", "high", etc. are used to facilitate the description to explain the positioning of an element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "an element is above / below another element" can mean that the two elements are in direct contact, or it can mean that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and should not be regarded as limitations. Similar terms represent similar elements throughout the description.

[0023] See also Figure 1The present invention provides a cage-type giant magnetostrictive proportional valve, which at least includes a valve body 1, a shell 2, a valve core 3, a cage bracket 4, a magnetic field control component 5 and a giant magnetostrictive rod 6. The valve body 1 has an air inlet 11 and an air outlet 12 that are connected to each other. The valve body 1 is also connected to the shell 2 to form an internal space, and the valve core 3, the cage bracket 4, the magnetic field control component 5 and the giant magnetostrictive rod 6 are all arranged in the internal space. One end of the valve core 3 is circumferentially sealed with the inner side of the valve body 1, so that the end face of the valve core 3 used for sealing forms a ventilation channel with the air inlet 11 and the air outlet 12. The end face of the valve core 3 axially close to one end of the valve body has a tip portion 31. After the tip portion 31 is extended into the air outlet 12 and set in place, it forms a seal with the inner wall of the air outlet 12, thereby achieving the sealing of the entire ventilation flow channel. The valve core 3 can move in a direction away from the valve body 1, so that a gap is generated between the tip portion 31 and the air outlet 12, so that the valve is opened.

[0024] One axial end of the cage bracket 4 is connected to the inner wall of the housing 2, and the other end is connected to the end of the valve core 3 away from the valve body 1. In order to facilitate the installation and replacement of the cage bracket 4 and the valve core 3, the two can be connected by threads, that is, the outer ring of the valve core 3 is provided with an external thread, and the inner ring of the cage bracket 4 is provided with an internal thread. One end of the valve core 3 is screwed into the cage bracket 4, thereby realizing the connection with the cage bracket 4.

[0025] The magnetic field control component 5 is arranged on the periphery of the cage bracket 4, and the giant magnetostrictive rod 6 is arranged inside the cage bracket 4. The direction of the magnetic field generated by the magnetic field control component 5 is arranged correspondingly according to the layout mode of the cage bracket 4 and the giant magnetostrictive rod 6, so as to ensure that the direction of the magnetic field generated by the magnetic field control component 5 is opposite to the direction of the magnetic field of the giant magnetostrictive rod. In the initial state of the valve, the initial magnetic field generated by the magnetic field control component 5 can flow through the giant magnetostrictive rod 6 well, so that the giant magnetostrictive rod 6 is stretched, so that the cage bracket 4 is also in an elongated state. After the magnetic field control component 5 is powered on, a magnetic field opposite to the initial magnetic field will be generated, so that the giant magnetostrictive rod 6 is shortened, and at the same time, the elongated cage bracket 4 is driven to gradually restore the original state. Driven by the cage bracket 4, the valve core 3 moves in a direction away from the valve body 1, so that the tip portion 31 of the valve core 3 forms a rated gap with the air outlet 12, thereby realizing the proportional control of the opening of the air outlet 12.

[0026] It should be noted that the cage bracket 4 has spiral grooves on its circumferential surface, has the characteristics of a spring, and can be stretched and compressed. The cage bracket 4 is made of non-magnetic material, such as titanium alloy, austenitic stainless steel, etc. The local maximum concentrated stress is less than 200MPa at the extreme position, and has a service life of 1 million times. The material of the valve core 3 is a magnetic material, and soft magnetic material or martensitic stainless steel can be selected. The housing 2 is a soft magnetic material, and commonly used materials are 1J36, GYJ130, 1J116, DT4, etc.

[0027] Specifically, after the giant magnetostrictive rod 6 is placed inside the cage bracket 4, under the action of the initial magnetic field of the magnetic field control component 5, the giant magnetostrictive rod 6 is in an elongated state, so that the cage bracket 4 is also in an elongated state. The thread at one end of the valve core 3 is screwed into the cage bracket 4, prestressing the giant magnetostrictive rod 6, and pressing the giant magnetostrictive rod 6 against the end surface inside the cage bracket. At this time, the tip portion 31 of the valve core 3 away from the cage bracket is sealed and connected to the air outlet 12. When the rated current is given to the magnetic field control component 5, the magnetic field control component 5 will generate a magnetic field in the opposite direction to that in the initial state, so that the induced magnetic field of the giant magnetostrictive rod 6 decreases, the giant magnetostrictive rod 6 will drive the cage bracket 4 to shorten, and the cage bracket 4 pulls the valve core 3 accordingly, so that the tip portion 31 of the valve core 3 and the air outlet 12 generate a rated gap, thereby realizing the proportional control of the valve opening of the proportional valve.

[0028] The cage-type giant magnetostrictive proportional valve of the embodiment of the present invention has a simple structure, a small size and is easy to install, so that the overall performance is significantly improved. With the cooperation of the cage-type bracket and the giant magnetostrictive rod, the telescopic stroke of the giant magnetostrictive rod will not be wasted, ensuring that the telescopic stroke of the giant magnetostrictive rod can be fully transmitted to the valve core, reducing the error generated in the process of valve opening control, significantly improving the valve proportional adjustment accuracy, and further improving the utilization rate of electric energy.

[0029] In one embodiment, the circumferential surface of the cage bracket 4 is provided with a spiral groove 41. As the giant magnetostrictive rod 6 is extended, the spiral groove 41 of the cage bracket 4 can be stretched and extended synchronously, and as the giant magnetostrictive rod 6 is contracted, the spiral groove 41 of the cage bracket 4 will gradually return to its original state, thereby being able to drive the valve core to move in proportion. The elastic expansion and contraction of the cage bracket is similar to the elastic change of the spring, but the spring is prone to bend when it is deformed, resulting in a waste of expansion and contraction stroke, which is easy to cause errors in the regulation of the proportional valve.

[0030] The cage-type giant magnetostrictive proportional valve of the embodiment of the present invention has spiral grooves on the circumferential surface of the cage-type support and giant magnetostrictive rods inside the cage-type support. Driven by the giant magnetostrictive rods, the cage-type support can perform extension and contraction actions well, and the displacement transmission process is streamlined, and no additional extension stroke is caused, thereby ensuring that the proportional valve always maintains high-precision opening adjustment.

[0031] Further, the width of the spiral groove of the present embodiment is X, and the rotation angle of the spiral groove is A. Through the analysis of multiple test results, it is determined that 0.6mm≥X≥0.5mm, 16°≥A≥15°, so that the control accuracy of the displacement of the regulating valve core can be guaranteed to be the highest, and at the same time, it is also guaranteed that when the pre-compression force of 170N is provided, the maximum stress of the structure is 190MPa, so that the structural stress is much smaller than the stress value of more than 1 million times of the working life. The cage structure not only provides the pre-compression force of the giant magnetostrictive rod, but also satisfies the valve core sealing force at the same time. And the pre-compression force of the giant magnetostrictive rod of the present invention can be satisfied only by the cage structure, and there is no need to interact with the valve body structure, so it is convenient to replace the valve body. And when the valve body is replaced, the pre-compression force of the giant magnetostrictive rod will not be affected, thereby reducing the influence of the valve body replacement on the valve accuracy. It can even be said that the replacement of the valve body has no effect on the process of displacement caused by magnetic control.

[0032] The embodiment of the present invention can adjust the pre-compression force of the giant magnetostrictive rod by controlling the displacement generated by the deformation of the giant magnetostrictive rod, and the pre-compression force is also convenient for secondary measurement, which makes it easier to ensure the assembly accuracy of the valve. At the same time, within a certain size range, the cage structure can be adapted to giant magnetostrictive rods of different specifications and models, meeting the installation requirements of giant magnetostrictive rods of multiple specifications.

[0033] See also Figure 2 In one embodiment, the magnetic field control assembly 5 includes: a winding skeleton 51, a permanent magnet 52 and a winding 53 arranged on the periphery of the cage bracket 4. One axial end of the winding skeleton 51 is connected to the inner wall of the housing 2, and the other end is arranged near the valve core 3. The winding 53 is wound and arranged on the outer annular surface of the winding skeleton 51, and the permanent magnet 52 is arranged on the inner annular surface of the winding skeleton 51. The winding skeleton 51 isolates the winding 53 from the cage bracket 4, thereby protecting the winding 53 from being scratched by the outer wall of the cage bracket. Among them, a first boss 511 is provided at one end of the radial inner side of the winding skeleton 51, and a second boss 411 is provided at one end of the radial outer side of the cage bracket 4 away from the first boss 511, and the permanent magnet 52 is axially movably arranged between the first boss 511 and the second boss 411. The permanent magnet 52 is used to provide an initial magnetic field for the giant magnetostrictive rod, and the winding 53 is used to provide a magnetic field opposite to the initial magnetic field for the giant magnetostrictive rod after being energized.

[0034] The cage-type giant magnetostrictive proportional valve of the embodiment of the present invention has a winding frame material of non-metallic materials such as polyimide and polytetrafluoroethylene, and a permanent magnet of samarium cobalt permanent magnet. The winding is wound around the outer periphery of the winding frame and tied and sealed. The permanent magnet provides axial magnetization in the initial direction for the giant magnetostrictive rod, so that the giant magnetostrictive rod is in an elongated state. When the winding is given a rated current, the magnetic field generated flows through the giant magnetostrictive rod in the axial direction, and the direction of the magnetic field is opposite to the direction of the magnetic field given by the permanent magnet, so that the induced magnetic field of the giant magnetostrictive rod decreases, thereby driving the cage bracket to shorten and moving the valve core away from the valve body, thereby realizing proportional control of the opening of the air outlet.

[0035] Furthermore, in the radial direction, the outer wall of the permanent magnet 52 is arranged close to the inner wall of the winding frame 51, and a gap of about 0.2 mm is left between the inner wall of the permanent magnet 52 and the cage bracket 4. The permanent magnet 52 is located between the first boss 511 and the second boss 411 in the axial direction, and there is an axial clearance of 0.05 mm to 0.1 mm with the corresponding boss.

[0036] Continue to see Figure 2 In one embodiment, the cage bracket 4 is fixed to the housing 2 through the base 42. The cage bracket 4 can be welded to one side of the base 42, and the other side of the base 42 is fixed to the inner wall of the housing 2. The base 42 is used as the magnetic circuit part of the magnetic field, and the commonly used materials are soft magnetic materials such as 1J36, GYJ130, 1J116, and DT4.

[0037] The cage-type giant magnetostrictive proportional valve of the embodiment of the present invention is fixed to the inner wall of the housing by the base, which can be easily installed on the one hand, and can adapt to cages of different lengths by changing the height of the base on the other hand. For example, when there are slight differences in the lengths of multiple cages, the length errors of the cages can be eliminated by adjusting the height of the base, thereby ensuring the consistency of each proportional valve.

[0038] See also Figure 3 In one embodiment, the gas outlet of the valve body is a conical hole 121 that matches the tip portion 31. The inclination of the conical hole 121 is consistent with the inclination of the tip portion 31, so that when the tip portion is in close contact with the conical hole and the sealing gasket, the ventilation channel can be sealed. When the valve core is pulled away from the valve body by the cage bracket, the tip portion is away from the conical hole, so that the gas outlet 12 is opened in proportion to provide an outlet for the medium.

[0039] Furthermore, a sealing gasket 122 is provided in the conical hole 121 to match the tip portion 31. The sealing gasket 122 is interference-fitted with the air outlet 12, and a small hole is opened in the middle. The small hole is refined to a shape that can match the tip portion 31, and its slope is consistent with the slope of the tip portion.

[0040] The effective flow area of ​​the valve can also be changed by changing the pore size of the sealing gasket.

[0041] Continue to see Figure 1 In one embodiment, in order to increase the sealing performance of the entire ventilation channel, an annular sealing groove may be provided at the position where the valve body 1 is sealed to the valve core 3 on the inner side of the valve body 1 in the circumferential direction, and an O-type sealing ring 13 is provided in the annular sealing groove. Furthermore, in order to avoid failure of the sealing ring, two annular sealing grooves may be provided in parallel, and an O-type sealing ring may be provided in each sealing groove.

[0042] Continue to see Figure 2 In one embodiment, a flange structure 32 is further provided on the circumferential outer side between the two axial ends of the valve core 3. The radial outer side of the flange structure 32 is spaced apart from the inner wall of the shell 2 to prevent the shell 2 from hindering the movement of the valve core 3. The axial end face of the flange structure 32 is spaced apart from the valve body 1, and the other axial end face is spaced apart from the winding skeleton 51. The cage-type giant magnetostrictive proportional valve of the embodiment of the present invention isolates the flow cavity from the magnetic control cavity and the drive cavity through the flange structure of the valve core, so that different models of products can be obtained by directly replacing the valve body according to needs. The proportional valve of the embodiment of the present invention has a streamlined structure and is easy to assemble and disassemble, which not only saves production costs, but also reduces the difficulty of valve installation and improves valve assembly efficiency.

[0043] In one embodiment, a winding outlet hole 21 is further provided on the circumferential surface of the housing 2. After the winding 53 is wound around the winding frame 51 and tied tightly, it extends out along the winding outlet hole 21 and is connected to an external circuit. The rated current is provided to the winding through the external circuit, so that the winding can generate a corresponding magnetic field. By adjusting the current, the valve opening can be adjusted, thereby proportionally adjusting the fluid flow and pressure.

[0044] The above embodiments can be combined with each other and have corresponding technical effects.

[0045] A cage-type giant magnetostrictive proportional valve according to an embodiment of the present invention utilizes a permanent magnet bias to pre-stretch the giant magnetostrictive rod, thereby solving the problems of cumbersome structural transmission, large cumulative error in displacement transmission, and invalid travel of the giant magnetostrictive rod. The cage-type structure not only meets the pre-tightening force requirement of the giant magnetostrictive rod, but also realizes the rigid connection with the valve core and the sealing function between the valve core and the sealing surface. No other elastic elements are required, which reduces the volume of the giant magnetostrictive proportional valve, optimizes the overall structure, and makes installation easier. At the same time, the adjustment accuracy, adjustment range, and robustness of the giant magnetostrictive proportional valve are also significantly improved. At the same time, the magnetic circuit layout of the proportional valve of the present invention can form a better circuit with less magnetic loss, which significantly improves the utilization rate of electric energy.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cage-type giant magnetostrictive proportional valve for electric propulsion, characterized in that: At least: Valve body, shell, valve core, cage bracket, magnetic field control component and giant magnetostrictive rod; the shell is made of soft magnetic material; the valve core is made of magnetic conductive material, and the cage bracket is made of non-magnetic conductive material; The valve body has an air inlet and an air outlet that are connected to each other, the shell is connected to the valve body to form an internal space, and the valve core, the cage bracket, the magnetic field control component and the giant magnetostrictive rod are all arranged in the internal space; One end of the valve core is circumferentially connected to the valve body in a sealed manner, so that the valve core, the air inlet and the air outlet form a ventilation flow channel; the end surface of the valve core close to one end of the valve body has a tip portion, and the tip portion is used to extend into the air outlet to form a seal of the ventilation flow channel; one axial end of the cage bracket is connected to the inner wall of the shell, and the other end is connected to the end of the valve core away from the valve body; the magnetic field control component is arranged on the periphery of the cage bracket, and the giant magnetostrictive rod is arranged inside the cage bracket; The magnetic field control component is used to change the direction of the magnetic field flowing through the giant magnetostrictive rod, so that the giant magnetostrictive rod drives the cage bracket to axially contract and drives the valve core to move away from the valve body, so that the tip of the valve core forms a rated gap with the air outlet, thereby realizing proportional control of the valve opening.

2. The cage-type giant magnetostrictive proportional valve according to claim 1, characterized in that: The circumferential surface of the cage bracket is provided with a spiral groove; the spiral groove can realize the elastic expansion and contraction of the cage bracket.

3. The cage-type giant magnetostrictive proportional valve according to claim 2, characterized in that: The magnetic field control assembly comprises: a winding frame, a permanent magnet and a winding arranged on the periphery of the cage bracket; one axial end of the winding frame is connected to the inner wall of the shell, and the other end is arranged close to the valve core; the winding is wound and arranged on the outer annular surface of the winding frame; A first boss is provided at one radially inner end of the winding frame, and a second boss is provided at one radially outer end of the cage bracket away from the first boss; the permanent magnet is axially movably arranged between the first boss and the second boss.

4. The cage-type giant magnetostrictive proportional valve according to claim 3, characterized in that: In the radial direction, the outer wall of the permanent magnet is closely arranged with the inner wall of the winding frame, and the inner wall of the permanent magnet is spaced apart from the outer wall of the cage bracket.

5. The cage-type giant magnetostrictive proportional valve according to claim 4, characterized in that: The cage bracket is fixedly arranged on the shell through a base; the cage bracket is welded on one side of the base, and the other side of the base is fixedly arranged on the inner wall of the shell.

6. The cage-type giant magnetostrictive proportional valve according to any one of claims 1 to 5, characterized in that: The air outlet of the valve body is a conical hole matched with the tip of the valve core, and a sealing gasket matched with the tip is also arranged in the conical hole; the inclination of the conical hole is consistent with the inclination of the tip of the valve core.

7. The cage-type giant magnetostrictive proportional valve according to claim 6, characterized in that: An annular sealing groove is provided at a position where the circumferential inner side of the valve body is sealed and connected to the valve core, and an O-type sealing ring is provided in the annular sealing groove.

8. The cage-type giant magnetostrictive proportional valve according to claim 7, characterized in that: A flange structure is also provided on the circumferential outer side between the two axial ends of the valve core; the radial outer side of the flange structure is spaced apart from the inner wall of the shell; the axial end face of the flange structure is spaced apart from the valve body, and the other axial end face is spaced apart from the winding skeleton arranged on the periphery of the cage bracket.

9. The cage-type giant magnetostrictive proportional valve according to claim 8, characterized in that: A winding outlet hole is also provided on the circumferential surface of the shell; after the winding is wound on the winding frame and tied tightly, it extends out along the winding outlet hole to be connected to the external circuit.

10. The cage-type giant magnetostrictive proportional valve according to claim 8, characterized in that: One end of the valve core away from the valve body is screwed into the cage bracket.

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