Hall thruster suitable for iodine environment

Abstract

The utility model discloses a Hall thruster suitable for an iodine environment, which belongs to the technical field of Hall thrusters and comprises an outer shell and an inner core arranged in the outer shell, an acceleration channel is defined between the outer shell and the inner core, a ceramic cavity shell is arranged in the acceleration channel, and excitation coils, metal anodes and hollow cathodes are arranged between the ceramic cavity shell and the outer shell and between the ceramic cavity shell and the inner core. The end portion of the ceramic cavity shell is fixedly connected with a connecting ring, and the outer shell, the inner core and the connecting ring are fixedly connected through connecting bolts. According to the technical scheme, the outer shell, the inner core and the ceramic cavity shell which serve as main structures are connected into a whole through the connecting rings, the thruster can be conveniently and rapidly disassembled and assembled, on the basis of the characteristics, part of components can be rapidly and conveniently replaced when damaged, magnet exciting coils with different turns can be conveniently replaced, and the manufacturing cost of the thruster is reduced. The working magnetic field of the thruster can be adjusted, the ceramic cavity shell can isolate the iodine working medium, and the corrosion effect of the iodine working medium is weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of Hall thrusters, in particular to a Hall thruster suitable for an iodine environment. Background Art

[0002] The working principle of the Hall thruster is to use the movement of ionized gas in a strong magnetic field to generate thrust. In the thruster, the propellant (such as xenon, radon, argon, etc.) is accelerated by the electric field, and the electrons are confined in the magnetic field. These electrons ionize the propellant, accelerate the ions to generate thrust, and neutralize the ions in the plume. When a high-frequency AC electric field is applied to a magnetic field, it causes the movement of electrons and ions in the ionized gas. When electrons and ions move in the magnetic field, they are affected by the Lorentz force, move along the direction of the magnetic field lines, and are accelerated and ejected under the action of the electric field, thereby generating thrust. Nowadays, iodine is also used as a propulsion medium.

[0003] However, iodine is a corrosive working fluid and a halogen element with strong chemical activity. It is more reactive in high-temperature steam state. When ordinary Hall thrusters use iodine as a propellant, it is very easy to cause corrosion and damage to its components during use. Moreover, since ordinary Hall thrusters are usually not easy to disassemble and install, replacement and maintenance of components when they are corroded and damaged are quite cumbersome. In addition, the excitation coil in the Hall thruster is usually embedded in the shell and is not easy to disassemble. It is difficult to adjust the characteristics of the working magnetic field by replacing coils with different numbers of turns, which is not convenient for thruster debugging. Therefore, to address the above problems, a Hall thruster suitable for iodine environment is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a Hall thruster suitable for an iodine environment. The Hall thruster connects the outer shell, inner core and ceramic cavity shell, which are the main structures, into an integral whole via a connecting ring, which facilitates rapid assembly and disassembly of the thruster. Based on the above characteristics, some components can be quickly and conveniently replaced when damaged, and excitation coils with different numbers of turns can be conveniently replaced to achieve adjustment of the thruster's working magnetic field. In addition, the provided ceramic cavity shell can isolate the iodine working medium to prevent it from directly contacting other parts of the thruster, effectively weakening the corrosive effects of the iodine working medium. This solves the technical problems in the prior art that Hall thrusters are generally difficult to disassemble and install, resulting in cumbersome replacement and maintenance when components are corroded and damaged, inconvenient coil replacement, and difficulty in adjusting the characteristics of the working magnetic field by replacing coils with different numbers of turns, as well as the fact that parts of the thruster's acceleration channel are easily corroded by the iodine working medium.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0006] A Hall thruster suitable for an iodine environment comprises an outer shell and an inner core disposed therein, wherein the central axes of the two coincide and an acceleration channel is enclosed therebetween. A ceramic cavity shell is provided in the acceleration channel, which can isolate the iodine working medium and prevent it from directly contacting other parts of the thruster, thereby effectively weakening the corrosive effects of the iodine working medium. An excitation coil, a metal anode mounted in the ceramic cavity shell, and a hollow cathode mounted on the outer shell are all provided between the ceramic cavity shell, the outer shell, and the inner core. A connecting ring is fixedly connected to the end of the ceramic cavity shell, the outer shell is clamped to the connecting ring and fixedly connected by connecting bolts, and the inner core is clamped to the connecting ring and fixedly connected by connecting bolts. The outer shell, inner core, and ceramic cavity shell, which are the main structures, are connected as a whole by the connecting ring, which facilitates rapid disassembly and assembly of the thruster. Based on the above characteristics, some components can be quickly and conveniently replaced when damaged, and excitation coils with different numbers of turns can be conveniently replaced to adjust the working magnetic field of the thruster.

[0007] In one possible implementation, the excitation coil includes an internal excitation coil and an external excitation coil, wherein the internal excitation coil is sleeved outside the inner core and fits therewith, and the external excitation coil is embedded in the outer shell and fits therewith. The above-mentioned sleeve installation method can facilitate the installation and disassembly of the internal excitation coil and the external excitation coil, and at the same time, it can also provide sufficient support for the above-mentioned two coils so that their positions will not be shifted due to shaking.

[0008] In one possible implementation, an outer lap ring is fixedly provided at the end of the outer shell, an inner lap ring is fixedly provided at the end of the inner core, and a snap-fit ​​convex ring is fixedly provided on the connecting ring, wherein the width of the snap-fit ​​convex ring is equal to the gap between the outer lap ring and the inner lap ring. The above-mentioned structural form can achieve a tight snap connection between the connecting ring and the outer shell and the inner core, ensuring the tightness of the overall structure after fixed connection.

[0009] In one possible implementation, the internal excitation coil includes an inner tube frame made of elastic material. This characteristic enables the internal excitation coil as a whole to have a certain deformation ability during installation, which is convenient for installation. A number of anti-deflection ridges distributed in a circular array are fixedly provided on its inner wall. The anti-deflection ridges fit with the outer wall of the inner core. The anti-deflection ridges can ensure that the internal excitation coil as a whole fits with the inner core to avoid position deviation. The inner tube frame is outer-mounted with an inner coil, which can generate a working magnetic field when energized.

[0010] In one possible implementation, the external excitation coil includes an outer cylinder frame made of elastic material. This characteristic enables the external excitation coil as a whole to have a certain degree of deformation ability during installation, which is convenient for installation. Its outer wall fits with the outer shell. This structural form can avoid its position displacement. The outer coil is fixed on its inner wall, and the external coil can generate a working magnetic field when energized.

[0011] In one possible implementation, a thread groove is provided at the front end of the inner core, and an end closing cover is installed at the front end thereof, and a threaded shaft is provided at the rear end of the end closing cover for threaded connection with the thread groove. This structural form provides the necessary structural basis for the installation and disassembly of the internal excitation coil.

[0012] In one possible implementation, the metal anode is incorporated with an air intake device, which serves as a propellant supply device for introducing a propellant medium into the discharge chamber. The metal anode is provided with a plurality of propellant slots connected to the acceleration channel. The above-mentioned structural form can release the iodine medium into the acceleration channel through the propellant slots to complete the subsequent ionization acceleration effect.

[0013] In one possible implementation, two ceramic end rings are fixedly provided at the front end of the ceramic cavity shell, which are respectively used to fit with the end closure cover and the front end surface of the outer shell. This structural form can ensure the tightness of the connection between the various components after installation, thereby improving the overall tightness of the thruster.

[0014] In summary, the present invention has the following beneficial technical effects:

[0015] The Hall thruster's main components, the outer shell, inner core, and ceramic cavity shell, are connected as a whole via a connecting ring, allowing for quick assembly and disassembly of the thruster. This allows for quick and convenient replacement of damaged components, as well as easy replacement of excitation coils with different numbers of turns to adjust the thruster's operating magnetic field.

[0016] In addition, the ceramic cavity shell can act as a discharge chamber, providing ionization and acceleration for the iodine working medium inside it, thereby isolating the iodine working medium and preventing it from directly contacting other parts of the thruster, which can effectively weaken the corrosive effect of the iodine working medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the coil structure of the present utility model.

[0022] In the figure: 1. outer shell; 11. outer lap ring; 2. inner core; 21. threaded groove; 22. end closure cover; 23. inner lap ring; 3. ceramic cavity shell; 31. ceramic end ring; 4. connecting ring; 41. snap-fit ​​convex ring; 5. inner excitation coil; 51. inner cylinder frame; 52. anti-deflection touch ridge; 53. inner coil; 6. outer excitation coil; 61. outer cylinder frame; 62. outer coil; 7. metal anode; 71. propellant channel; 8. hollow cathode; 9. connecting bolt. DETAILED DESCRIPTION

[0023] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0024] like Figure 1 - Figure 3 As shown, the present embodiment provides a Hall thruster suitable for an iodine environment, comprising an outer shell 1 and an inner core 2 arranged therein, wherein the central axes of the two coincide with each other and an acceleration channel is formed between the two. A ceramic cavity shell 3 is provided in the acceleration channel, and the ceramic cavity shell 3 can isolate the iodine working medium, thereby preventing it from directly contacting other parts of the thruster and effectively weakening the corrosive effect of the iodine working medium. An excitation coil is provided between the ceramic cavity shell 3 and the outer shell 1 and the inner core 2, a metal anode 7 is installed in the ceramic cavity shell 3, and a hollow cathode 8 is installed in the outer shell 1 and the inner core 2. On the outer shell 1, a connecting ring 4 is fixedly connected to the end of the ceramic cavity shell 3. The outer shell 1 is clamped with the connecting ring 4 and fixedly connected by connecting bolts 9. The inner core 2 is clamped with the connecting ring 4 and fixedly connected by connecting bolts 9. The outer shell 1, the inner core 2 and the ceramic cavity shell 3 as the main structures are connected as a whole through the connecting ring 4, which can facilitate the rapid disassembly and assembly of the thruster. Based on the above characteristics, some components can be quickly and conveniently replaced when damaged, and excitation coils with different numbers of turns can be conveniently replaced to achieve adjustment of the thruster's working magnetic field.

[0025] like Figure 2 As shown, the excitation coil includes an inner excitation coil 5 and an outer excitation coil 6, wherein the inner excitation coil 5 is sleeved outside the inner core 2 and fits therewith, and the outer excitation coil 6 is embedded in the outer shell 1 and fits therewith. The above-mentioned sleeve installation method can facilitate the installation and disassembly of the inner excitation coil 5 and the outer excitation coil 6, and at the same time, it can also ensure that the above-mentioned two coils are sufficiently supported and will not be offset in position due to shaking.

[0026] like Figure 3As shown, an outer lap ring 11 is fixedly provided at the end of the outer shell 1, an inner lap ring 23 is fixedly provided at the end of the inner core 2, and a snap-fitting protrusion 41 is fixedly provided on the connecting ring 4, wherein the width of the snap-fitting protrusion 41 is equal to the gap between the outer lap ring 11 and the inner lap ring 23. The above-mentioned structural form can realize a tight snap-fit ​​between the connecting ring 4 and the outer shell 1 and the inner core 2, thereby ensuring the tightness of the overall structure after the fixed connection.

[0027] like Figure 4 As shown, the internal excitation coil 5 includes an inner tube frame 51 made of elastic material. This characteristic enables the internal excitation coil 5 as a whole to have a certain deformation ability during installation, which is convenient for installation. A number of anti-deflection ridges 52 distributed in a circular array are fixedly provided on the inner wall. The anti-deflection ridges 52 are in contact with the outer wall of the inner core 2. The anti-deflection ridges 52 can ensure that the internal excitation coil 5 as a whole is in contact with the inner core 2 to avoid positional deviation. An inner coil 53 is provided on the outer sleeve of the inner tube frame 51. The inner coil 53 can generate a working magnetic field when energized; the external excitation coil 6 includes an outer tube frame 61 made of elastic material. This characteristic enables the external excitation coil 6 as a whole to have a certain deformation ability during installation, which is convenient for installation. The outer wall is in contact with the outer shell 1. This structural form can avoid positional deviation. An outer coil 62 is fixed on the inner wall. The outer coil 62 can generate a working magnetic field when energized.

[0028] like Figure 2 As shown, a thread groove 21 is provided at the front end of the inner core 2, and an end closing cover 22 is installed at the front end thereof, and a threaded shaft is provided at the rear end of the end closing cover 22 for threaded connection with the thread groove 21. This structural form provides the necessary structural basis for the installation and disassembly of the internal excitation coil 5.

[0029] like Figure 2 - Figure 3 As shown, the metal anode 7 is integrated with an air intake device, which serves as a thrust supply device for introducing a propellant medium into the discharge chamber. The metal anode 7 is provided with a plurality of propellant slots 71 connected to the acceleration channel. The above-mentioned structural form can realize the release of iodine medium into the acceleration channel through the propellant slots 71 to complete the subsequent ionization acceleration effect.

[0030] like Figure 2 As shown, two ceramic end rings 31 are fixedly provided at the front end of the ceramic cavity shell 3, which are respectively used to fit with the end closure cover 22 and the front end surface of the outer shell 1. This structural form can ensure the tightness of the connection between the various components after installation, thereby improving the overall tightness of the thruster.

[0031] The use principle and use process of this utility model:

[0032] The Hall thruster connects the outer shell 1, inner core 2 and ceramic cavity shell 3, which are the main structures, into an integral whole through a connecting ring 4, which can facilitate rapid disassembly and assembly of the thruster. Based on the above characteristics, some components can be quickly and conveniently replaced when damaged, and excitation coils with different numbers of turns can be conveniently replaced to adjust the working magnetic field of the thruster. Specifically, an outer lap ring 11 is fixedly provided at the end of the outer shell 1, an inner lap ring 23 is fixedly provided at the end of the inner core 2, and a snap-fitting protrusion 41 is fixedly provided on the connecting ring 4, wherein the width of the snap-fitting protrusion 41 is equal to the gap between the outer lap ring 11 and the inner lap ring 23. The above structural form can achieve a tight snap-fit ​​between the connecting ring 4 and the outer shell 1 and inner core 2, ensuring the tightness of the overall structure after the fixed connection.

[0033] In the above structure, the excitation coil includes an internal excitation coil 5 and an external excitation coil 6, wherein the internal excitation coil 5 is sleeved outside the inner core 2 and fits therewith, and the external excitation coil 6 is embedded in the outer shell 1 and fits therewith. The above-mentioned sleeve installation method can facilitate the installation and disassembly of the internal excitation coil 5 and the external excitation coil 6, and at the same time, it can also provide the above-mentioned two coils with sufficient support so that the position will not be offset due to shaking.

[0034] In addition, the provided ceramic cavity shell 3 can act as a discharge chamber, providing ionization and acceleration for the iodine working medium inside it, thereby isolating the iodine working medium and preventing it from directly contacting other parts of the thruster, which can effectively weaken the corrosive effect of the iodine working medium.

[0035] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A Hall thruster suitable for iodine environment, characterized in that: include: The outer shell (1) and the inner core (2) disposed therein have their central axes coincident with each other, and an acceleration channel is formed between the two. A ceramic cavity shell (3) is provided in the acceleration channel, and excitation coils are provided between the ceramic cavity shell (3), the outer shell (1), and the inner core (2); A metal anode (7) is mounted in the ceramic cavity shell (3); a hollow cathode (8) mounted on the housing (1); The end of the ceramic cavity shell (3) is fixedly connected to a connecting ring (4); the outer shell (1) is clamped to the connecting ring (4) and fixedly connected via a connecting bolt (9); and the inner core (2) is clamped to the connecting ring (4) and fixedly connected via a connecting bolt (9).

2. The Hall thruster suitable for iodine environment according to claim 1, characterized in that: The excitation coil comprises an inner excitation coil (5) and an outer excitation coil (6), wherein the inner excitation coil (5) is sleeved outside the inner core (2) and fits therewith, and the outer excitation coil (6) is embedded in the outer shell (1) and fits therewith.

3. The Hall thruster suitable for iodine environment according to claim 1, characterized in that: An outer lap ring (11) is fixedly provided at the end of the outer shell (1), an inner lap ring (23) is fixedly provided at the end of the inner core (2), and a snap-fit ​​convex ring (41) is fixedly provided on the connecting ring (4), wherein the width of the snap-fit ​​convex ring (41) is equal to the gap between the outer lap ring (11) and the inner lap ring (23).

4. The Hall thruster suitable for an iodine environment according to claim 2, characterized in that: The inner excitation coil (5) comprises an inner cylinder frame (51) made of elastic material, the inner wall of which is fixedly provided with a plurality of anti-deflection ridges (52) distributed in a circumferential array, the anti-deflection ridges (52) being in contact with the outer wall of the inner core (2), and the inner cylinder frame (51) is provided with an inner coil (53) on its outer shell.

5. The Hall thruster suitable for iodine environment according to claim 2, characterized in that: The external excitation coil (6) comprises an outer cylinder frame (61) made of elastic material, the outer wall of which is in contact with the outer shell (1), and the inner wall of which is fixedly provided with an outer coil (62).

6. The Hall thruster suitable for iodine environment according to claim 1, characterized in that: The front end of the inner core (2) is provided with a thread groove (21), and an end closing cover (22) is installed at the front end. The rear end of the end closing cover (22) is provided with a threaded shaft for threaded connection with the thread groove (21).

7. The Hall thruster suitable for an iodine environment according to claim 1, characterized in that: The metal anode (7) is combined with an air intake device, which serves as a propellant supply device for introducing a propellant medium into the discharge chamber. The metal anode (7) is provided with a plurality of propellant slots (71) connected to acceleration channels.

8. The Hall thruster suitable for iodine environment according to claim 6, characterized in that: Two ceramic end rings (31) are fixedly provided at the front end of the ceramic cavity shell (3), respectively used to fit with the end closure cover (22) and the front end surface of the outer shell (1).

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