A vibration reduction structure for an ion thruster optical system

Abstract

This application relates to the field of aerospace electric propulsion technology, specifically to a vibration damping structure for an ion thruster optical system. The structure includes an upper pole shoe, a mounting flange, a magnetic sleeve, and vibration damping plates. The upper pole shoe and mounting flange are both annular structures. The optical system is fixedly mounted on the surface of the upper pole shoe. Multiple magnetic sleeves are arranged in a ring-like configuration between the upper pole shoe and the mounting flange, with one end of each sleeve connected to the upper pole shoe and the other end connected to the mounting flange. The number of vibration damping plates is the same as the number of magnetic sleeves, with one damping plate corresponding to each magnetic sleeve. One end of each damping plate is connected to the middle of the outer wall of the magnetic sleeve, and the other end is connected to the optical system. This application effectively reduces the stiffness of the force transmission path structure of the optical system and improves its impact resistance through a C-shaped vibration damping plate and a connecting lug between the magnetic sleeve and the damping plate.

Description

Technical Field

[0001] This application relates to the field of aerospace electric propulsion technology, and more specifically, to a vibration reduction structure for an ion thruster optical system. Background Technology

[0002] During operation, the ion thruster converts xenon working propellant into plasma in the discharge chamber, and then uses an optical system to extract and accelerate it to generate thrust, enabling the satellite to maintain its position and control its attitude in orbit.

[0003] As a large-aperture, thin-walled structure with a diameter-to-thickness ratio of 400, the optical system's mechanical properties are affected by its structure, making it prone to damage during impact tests, which can lead to the loss of function of the ion thruster.

[0004] To ensure that the ion thruster's optical system can meet the mechanical requirements of the satellite launch process, a vibration reduction structure can be designed to reduce the stress on the optical system during launch, improve the reliability of the optical system, and ensure that the ion thruster completes its on-orbit mission. Summary of the Invention

[0005] This application provides a vibration damping structure for an ion thruster optical system, which can improve the shock resistance of the ion thruster optical system and reduce the stress during the launch process.

[0006] To achieve the above objectives, this application provides a vibration damping structure for an ion thruster optical system, including an upper pole shoe, a mounting flange, a magnetic sleeve, and vibration damping plates, wherein: the upper pole shoe and the mounting flange are both annular structures; the optical system is fixedly mounted on the surface of the upper pole shoe; multiple magnetic sleeves are arranged in a ring-shaped configuration between the upper pole shoe and the mounting flange, with one end of each magnetic sleeve connected to the upper pole shoe and the other end connected to the mounting flange; the number of vibration damping plates is the same as the number of magnetic sleeves, with one vibration damping plate corresponding to each magnetic sleeve; one end of each vibration damping plate is connected to the middle of the outer wall of the magnetic sleeve, and the other end is connected to the optical system.

[0007] Furthermore, the optical system is a ring-shaped, large-diameter, thin-walled convex structure with multiple mounting lugs evenly arranged along the ring surface.

[0008] Furthermore, each magnet sleeve has an adapter lug in the middle of its outer wall.

[0009] Furthermore, the damping plate is a high-rigidity metal C-shaped plate, including an upper connecting end, a damping support section, and a lower connecting end.

[0010] Furthermore, the upper connecting end of the damping plate is fixedly connected to the mounting lug of the optical system, and the lower connecting end of the damping plate is fixedly connected to the adapter lug in the middle of the outer wall of the magnet sleeve.

[0011] Furthermore, the damping support section of the damping plate is the main damping structure, used to transfer the force path of the optical system.

[0012] Furthermore, the force transmission sequence of the optical system is as follows: mounting flange, magnetic sleeve, damping plate, and optical system.

[0013] The present invention provides a vibration reduction structure for an ion thruster optical system, which has the following beneficial effects:

[0014] This application features a simple structure and easy installation. By using a C-shaped damping plate and a magnetic sleeve adapter lug, the stiffness of the force transmission path structure of the optical system is effectively reduced, thereby reducing the vibration amplitude transmitted from the mounting flange to the optical system, improving the impact resistance of the optical system, and enhancing the overall reliability of the ion thruster. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0016] Figure 1 This is a schematic diagram of a vibration reduction structure for an ion thruster optical system provided according to an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of a magnet sleeve for a vibration damping structure of an ion thruster optical system provided according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram showing the connection between the damping plate and the magnetic sleeve of the damping structure for an ion thruster optical system according to an embodiment of this application;

[0019] In the diagram: 1-Upper pole shoe, 2-Mounting flange, 3-Magnetic sleeve, 4-Vibration damping plate, 41-Upper connecting end, 42-Vibration damping support section, 43-Lower connecting end, 5-Optical system, 6-Mounting lug, 7-Adapter lug. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] In addition, the term "multiple" should mean two or more.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, this application provides a vibration damping structure for an ion thruster optical system, including an upper pole shoe 1, a mounting flange 2, a magnetic sleeve 3, and vibration damping plates 4, wherein: the upper pole shoe 1 and the mounting flange 2 are both annular structures; the optical system 5 is fixedly mounted on the surface of the upper pole shoe 1; multiple magnetic sleeves 3 are provided, and the multiple magnetic sleeves 3 are arranged around the upper pole shoe 1 and the mounting flange 2, with one end of each magnetic sleeve 3 connected to the upper pole shoe 1 and the other end connected to the mounting flange 2; the number of vibration damping plates 4 is the same as the number of magnetic sleeves 3, and one vibration damping plate 4 is correspondingly provided on each magnetic sleeve 3; one end of the vibration damping plate 4 is connected to the middle of the outer wall of the magnetic sleeve 3, and the other end is connected to the optical system 5.

[0027] Specifically, the vibration damping structure for the optical system of the ion thruster provided in this application embodiment is mainly used in the optical system 5 of the ion thruster to improve the impact resistance of the optical system 5, thereby reducing the stress on the optical system 5 during impact tests or launch processes, preventing damage to the optical system 5, and thus preventing the loss of the overall function of the ion thruster. The upper pole shoe 1 is mainly used to fix the optical system 5, and the mounting flange 2 is mainly used to fix the optical system 5 to the internal structure of the ion thruster. The optical system 5 is fixed inside the ion thruster by the annular upper pole shoe 1 and the mounting flange 2. The magnetic sleeve 3 is set between the upper pole shoe 1 and the mounting flange 2. It is part of the magnetic field of the discharge chamber of the ion thruster and is used to connect the upper pole shoe 1 and the mounting flange 2. It plays a role in fixing and supporting and buffering. Depending on the size of the upper pole shoe 1 and the mounting flange 2, multiple magnetic sleeves 3 can be set. In this embodiment, eight magnetic sleeves 3 are preferably set and evenly distributed between the upper pole shoe 1 and the mounting flange 2 at intervals. The upper end of each magnetic sleeve 3 is fixedly connected to the upper pole shoe 1 and the lower end is fixedly connected to the mounting flange 2. The fixing method is preferably bolt fixing. The vibration damping plate 4 is used to connect the magnetic sleeve 3 and the optical system 5. It is mainly used for vibration damping and reducing the vibration amplitude of the mechanical vibration. The vibration damping plate 4 is set correspondingly to the magnetic sleeve 3. Each magnetic sleeve 3 is provided with a vibration damping plate 4.

[0028] Furthermore, the optical system 5 is a ring-shaped, large-diameter, thin-walled, convex structure with multiple mounting tabs 6 evenly arranged along the ring surface. The optical system 5 is located inside the ion thruster and is mainly used to extract plasma to generate thrust. The optical system 5 is generally composed of a grid assembly, and the whole is a ring-shaped, large-diameter, thin-walled, convex structure with multiple mounting tabs 6 evenly arranged along the ring surface. The number and position of the mounting tabs 6 correspond to the damping plates 4.

[0029] Furthermore, each magnetic sleeve 3 has a connecting lug 7 in the middle of its outer wall. The magnetic sleeve 3 is a cylindrical structure with a connecting lug 7 in the middle of its outer wall for corresponding connection with the damping plate 4. The buffering effect varies depending on the location of the connecting lug 7 on the magnetic sleeve 3. Through simulation calculation, the buffering effect is best when the connecting lug 7 is located in the middle of the magnetic sleeve 3.

[0030] Furthermore, the damping plate 4 is a high-rigidity metal C-shaped plate, including an upper connecting end 41, a damping support section 42, and a lower connecting end 43.

[0031] Furthermore, the upper connecting end 41 of the damping plate 4 is fixedly connected to the mounting lug 6 of the optical system 5, and the lower connecting end 43 of the damping plate 4 is fixedly connected to the adapter lug 7 in the middle of the outer wall of the magnet sleeve 3.

[0032] Furthermore, the damping support section 42 of the damping plate 4 is the main damping structure, used to transfer the force path of the optical system 5.

[0033] Specifically, such as Figure 2-3 As shown in this embodiment, the material of the damping plate 4 is a high-rigidity metal, preferably TC4 titanium alloy, and the overall shape is "C". There are also 8 of them, which are arranged corresponding to the magnetic steel sleeve 3. They include an upper connecting end 41 that is connected to the mounting lug 6 of the optical system 5, a lower connecting end 43 that is connected to the transition lug 7 in the middle of the outer wall of the magnetic steel sleeve 3, and a damping support section 42 that plays the main role in damping. The upper connecting end 41, the damping support section 42 and the lower connecting end 43 are integrally formed structures and are arranged between the optical system 5 and the magnetic steel sleeve 3. The fixed connection method is preferably bolt connection, which is mainly used to reduce the amplitude of mechanical vibration and impact response transmitted to the optical system 5.

[0034] Furthermore, the force transmission sequence of the optical system 5 is as follows: mounting flange 2, magnetic sleeve 3, damping plate 4, and optical system 5. Compared to the traditional optical system 5 where the force is directly transmitted from the mounting flange 2 to the optical system 5, in this embodiment, the force is transmitted sequentially from the mounting flange 2 to the magnetic sleeve 3, then from the magnetic sleeve 3 to the damping plate 4, and finally from the damping plate 4 to the optical system 5. Through the damping effect of the damping plate 4 and the magnetic sleeve 3, the stiffness of the force transmission path structure of the optical system 5 is effectively reduced, the impact resistance of the optical system 5 is improved, damage during operation is prevented, and the overall reliability of the ion thruster is improved.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vibration damping structure for an ion thruster optical system, characterized in that, Includes upper pole shoe, mounting flange, magnet sleeve and vibration damping plate, among which: Both the upper pole shoe and the mounting flange are annular structures; The optical system is fixedly mounted on the surface of the upper pole shoe; Multiple magnetic steel sleeves are provided, and the multiple magnetic steel sleeves are arranged around the upper pole shoe and the mounting flange. One end of each magnetic steel sleeve is connected to the upper pole shoe and the other end is connected to the mounting flange. The number of damping plates is the same as the number of magnetic steel sleeves, and one damping plate is correspondingly provided on each magnetic steel sleeve; One end of the damping plate is connected to the middle of the outer wall of the magnetic sleeve, and the other end is connected to the optical system; The optical system is a ring-shaped, large-diameter, thin-walled, convex structure with multiple mounting lugs evenly arranged along the ring surface. Each of the aforementioned magnet sleeves has a connecting lug at the middle of its outer wall; The damping sheet is a high-rigidity metal C-shaped sheet, including an upper connecting end, a damping support section and a lower connecting end, which are integrally formed. The upper connecting end of the damping plate is fixedly connected to the mounting lug of the optical system, and the lower connecting end of the damping plate is fixedly connected to the adapter lug in the middle of the outer wall of the magnet sleeve. The damping support section of the damping plate is the main damping structure, used to transfer the force path of the optical system; The force transmission sequence of the optical system is as follows: mounting flange, magnet sleeve, damping plate, optical system.

Images