Sealing structure of control moment gyro

Abstract

This application relates to the field of aerospace testing technology and provides a sealing structure for a control moment gyroscope. It includes: a first sealing cover 1, a base 2, a first sealing groove 4, a first sealing ring 6, and a first fastener 8. The first sealing cover 1 covers the first surface of the base 2, and a side wall 12 is located under the umbrella-shaped cover 11 of the first sealing cover 1. A first support edge 13 extends outward from the bottom of the side wall 12. The bottom surface of the first support edge 13 is in close contact with and compacted against the first sealing ring 6 within the first sealing groove 4. The first sealing groove 4 is disposed on the edge of the first surface of the base 2. The first support edge 13 is tightly fitted to the base 2. The base 2 is used to position and support the high-speed rotor of the control moment gyroscope. The sealing structure provided in this application uses a sealing ring seal, which can be repeatedly disassembled and reassembled, and is convenient for disassembly and assembly, facilitating debugging during the production process and meeting the needs of multiple disassembly and assembly during product debugging.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and in particular to a sealing structure for controlling a torque gyroscope. Background Technology

[0002] A control moment gyroscope (CMG) is a high-speed component that uses a motor to drive a rotor supported by bearings to rotate at high speed. The CMG generates the required control torque by changing the direction of the high-speed rotor's rotational speed, thus achieving precise attitude control of the spacecraft. As satellite missions become increasingly complex and satellites become heavier, CMGs are frequently used to adjust the attitude of large-mass satellites due to the relatively small torque generated by ordinary flywheels. CMGs are widely used in various satellites, manned spacecraft, space stations, and other spacecraft due to their high precision, long lifespan, and high reliability.

[0003] Typically, the rotors inside high-speed CMG modules operate at high speeds. The air inside the module exerts significant resistance on the rotor, increasing windage losses. Higher speeds result in greater air resistance, shorter deceleration times, and higher power consumption for speed stabilization and regulation. Furthermore, the dust present in ground-based testing environments can enter the high-speed module during rotor rotation, leading to decreased lubrication of mechanical bearings. For CMGs operating in the vacuum environment of high orbit, cosmic rays and antimatter entering the high-speed module can cause malfunctions.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This application provides a sealing structure for a control torque gyroscope, which can ensure the long-term reliable operation of high-speed components. It includes: a first sealing cover 1, a base 2, a first sealing groove 4, a first sealing ring 6, and a first fastener 8; the first sealing cover 1 covers the first surface of the base 2, and the umbrella-shaped cover 11 of the first sealing cover 1 has a side wall 12 below it; a first support edge 13 extends outward from the bottom of the side wall 12; the bottom surface of the first support edge 13 is in close contact with and compacted with the first sealing ring 6 in the first sealing groove 4; the first sealing groove 4 is disposed on the edge of the first surface of the base 2; the first support edge 13 is fastened to the base 2 by the first fastener 8; multiple first fasteners 8 are symmetrically distributed at equal intervals along the circumferential direction of the first support edge; the umbrella-shaped cover 11 of the first sealing cover 1 is provided with a radial first reinforcing rib 14 and a circumferential second reinforcing rib 15; the base 2 is used to position and support the high-speed rotor of the control torque gyroscope.

[0006] In some possible designs, the sealing structure further includes: a second sealing cover 3, a second sealing groove 5, a second sealing ring 7, and a second fastener 9; the second sealing cover 3 covers the lower part of the second surface of the base 2, and the umbrella-shaped cover 31 of the second sealing cover 3 has a side wall 32 below it; a second support edge 33 extends outward from the bottom of the side wall 32; the bottom surface of the second support edge 33 is in close contact with and compacted with the second sealing ring 7 in the second sealing groove 5; the second sealing groove 5 is disposed on the edge of the second surface of the base 2; the second support edge 33 is fastened to the base 2 by a plurality of second fasteners 9; the plurality of second fasteners 9 are symmetrically distributed at equal intervals along the circumferential direction of the second support edge; the umbrella-shaped cover 31 of the second sealing cover 3 is provided with a radial third reinforcing rib 34 and a circumferential fourth reinforcing rib 35.

[0007] In some possible designs, the first sealing ring 6 is placed in the first sealing groove 4, and the cross-sectional shape of the first sealing groove 4 includes a rectangle, a semi-circle, an arc, or a trapezoid; the cross-sectional diameter of the first sealing ring 6 is greater than the depth of the first sealing groove 4, and the difference between the two satisfies the requirement of a tight fit.

[0008] In some possible designs, the second sealing ring 7 is placed inside the second sealing groove 5, and the cross-sectional shape of the second sealing groove 5 includes rectangular, semi-circular, arc-shaped or trapezoidal; the cross-sectional diameter of the second sealing ring 7 is greater than the depth of the second sealing groove 5, and the difference between the two satisfies the requirement of tight fit.

[0009] In some possible designs, the first sealing ring 6 is a sealing material that is difficult to release or volatilize under vacuum conditions, such as perfluoroether rubber, fluororubber, fluorosilicone rubber, hydrogenated nitrile rubber, or silicone rubber.

[0010] In some possible designs, the second sealing ring 7 is a sealing material that is difficult to release or volatilize under vacuum conditions. The sealing material that is difficult to release or volatilize under vacuum conditions is perfluoroether rubber, fluororubber, fluorosilicone rubber, hydrogenated nitrile rubber, or silicone rubber.

[0011] In some possible designs, the first fastener 8 is a clamp, sleeve, or screw.

[0012] In some possible designs, the second fastener 9 is a clamp, sleeve, or screw.

[0013] In some possible designs, the roughness of the bottom surface of the first support along 13 and the roughness of the first surface of the base 2 are within a first threshold range, and the flatness of the bottom surface of the first support along 13 and the flatness of the first surface of the base 2 are within a second threshold range.

[0014] In some possible designs, the roughness of the bottom surface of the second support along 33 and the roughness of the second surface of the base 2 are within a first threshold range, and the flatness of the bottom surface of the second support along 33 and the flatness of the second surface of the base 2 are within a second threshold range.

[0015] The control torque gyroscope sealing structure provided in this application is simple and convenient to install, requires no special skills from operators, and can greatly improve production efficiency.

[0016] During installation, the use of sealing rings, compared to welding, avoids the high temperatures associated with welding on the base and sealing cover. This prevents thermal deformation and maintains the original dimensional accuracy, thus preventing significant internal stress. Similarly, it does not affect the internal circuit board and electronic components of the control torque gyroscope, ensuring safety and reliability.

[0017] The control torque gyroscope sealing structure provided in this application uses a sealing ring for sealing, which can be repeatedly disassembled and reassembled. The disassembly and reassembly are convenient and facilitate debugging during the production process, meeting the needs of multiple disassembly and reassembly during product debugging.

[0018] The control torque gyroscope sealing structure provided in this application will not result in secondary welding due to poor welding process, which greatly improves production efficiency and reduces the cost of the sealing ring. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the various embodiments disclosed in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only a few embodiments disclosed in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] The accompanying drawings used in the description of the embodiments or prior art are briefly introduced below.

[0021] Figure 1 This is a front view of the sealing structure of the control torque gyroscope provided in an embodiment of this application;

[0022] Figure 2 This is a partial schematic diagram of the first sealing structure A provided in an embodiment of this application; Figure 3 A top view of the first sealing cover provided in an embodiment of this application; Figure 4 A partial schematic diagram of the second sealing structure B provided in an embodiment of this application; Figure 5 A bottom view of the second sealing cover provided in an embodiment of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings.

[0024] In the description of the embodiments of this application, the words "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a specific manner.

[0025] In the description of the embodiments in this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, B existing alone, and A and B existing simultaneously. Furthermore, unless otherwise stated, the term "multiple" means two or more. For example, multiple systems refer to two or more systems, and multiple terminals refer to two or more terminals.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0027] In the description of the embodiments in this application, "some embodiments" are mentioned, which describe a subset of all possible embodiments. However, it is understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0028] In the description of the embodiments of this application, the terms "first, second, third, etc." or module A, module B, module C, etc. are used only to distinguish similar objects and do not represent a specific ordering of objects. It is understood that, where permitted, a specific order or sequence can be interchanged so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0029] In the description of the embodiments of this application, the reference numerals for the steps, such as S110, S120, etc., do not necessarily indicate that the steps will be executed in this manner. Where permissible, the order of the steps can be interchanged or executed simultaneously.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0031] One approach involves vacuum sealing the housing of a high-speed component using welding. The welding seal uses metal solder, such as solder rings or brazing rings, to connect the base of the high-speed component to the sealing cover. The welding seal primarily involves the sealing cover and base being installed in an alternating, overlapping manner in the circumferential direction. A certain space is left in the middle of the outermost ring to accommodate a positioning ring. This positioning ring is mainly used to correct for machining errors in the sealing cover and base; therefore, it needs to be dimensionally fitted according to the sealing cover and base. Finally, the outermost edge is welded with solder strips at high temperature to weld the sealing cover and base together, achieving both connection and sealing.

[0032] While welding provides high connection strength, it is also extremely difficult to disassemble. During the production and debugging process, flywheels often require multiple disassembly and reassembly. When disassembling the welded seal, high temperatures are needed to melt the welding material before it can be removed. At the same time, a large amount of irregular welding material adheres to the welding strip, base, and sealing cover, resulting in an uneven surface. When welding again, the welding material on the base and sealing cover must be thoroughly cleaned before welding can be done again. Because the welding strip is thin, there is a risk of damaging it during the removal of welding material, so the disassembled welding strip cannot be reused. This greatly increases production costs. Moreover, welding requires certain techniques, resulting in low production efficiency.

[0033] In view of this, embodiments of this application provide a sealing structure for controlling a torque gyroscope.

[0034] like Figure 1-5 As shown, the sealing structure of the control torque gyroscope provided in this application embodiment includes: a first sealing cover 1, a base 2, a second sealing cover 3, a first sealing groove 4, a second sealing groove 5, a first sealing ring 6, a second sealing ring 7, and a first fastener 8 and a second fastener 9.

[0035] like Figure 1 As shown, the umbrella-shaped cover 11 of the first sealing cover 1 has a ring of sidewalls 12. The first sealing cover 1 covers the top of the first surface (also known as the upper surface) of the base 2, and the first sealing mechanism A makes the inner recess of the first sealing cover 1 and the first surface of the base 2 form a vacuum sealing system.

[0036] The umbrella-shaped cover 31 of the second sealing cover 3 has a ring of sidewalls 32. The second sealing cover 3 covers the lower surface (also known as the lower surface) of the base 2, and the second sealing mechanism B makes the inner recess of the second sealing cover 3 and the second surface of the base 2 form a vacuum sealing system.

[0037] First sealing mechanism A Figure 2 As shown, a first support edge 13 extends outward from the bottom of the side wall 12. The bottom surface of the first support edge 13 is in close contact with and compacted with the first sealing ring 6 inside the first sealing groove 4.

[0038] The first sealing groove 4 is disposed on the frame of the first surface of the base 2. The cross-section of the first sealing groove 4 can be rectangular, semi-circular, arc-shaped or trapezoidal.

[0039] The first sealing ring 6 is disposed in the first sealing groove 4.

[0040] For example, a rectangular groove can be cut around the circumference of the frame on the first surface of the base 2 to accommodate the first sealing ring 6. Alternatively, a semi-circular groove can be cut around the circumference of the frame on the first surface of the base 2 to accommodate the first sealing ring 6. Or, a trapezoidal groove can be cut around the circumference of the frame on the first surface of the base 2 to accommodate the first sealing ring 6.

[0041] The size of the inner and outer rings of the first sealing ring 6 can be adapted to match the overall shape and dimensions of the product. To achieve a better sealing effect, the cross-sectional diameter of the first sealing ring 6 can be slightly larger than the depth of the first sealing groove 4, and the difference between the two meets the requirements of tight fit and sealing.

[0042] The material of the first sealing ring 6 must meet the following usage constraints: the material must not corrode or damage the supporting circuit board, nor produce harmful substances that could affect the normal operation of other satellite components.

[0043] In the satellite space environment, conventional rubber sealing rings can release volatile pollutants. These pollutants, when adhering to the surfaces of optical lenses, sensors, and solar panels, can degrade the optical and electrical output performance of the equipment. Deposits on controller circuit boards can also directly cause short circuits. Therefore, in some embodiments of this application, the first sealing ring 6 can be configured with a material that is difficult to release or volatilize in a vacuum environment.

[0044] In some possible designs, the first sealing ring 6 can be made of a sealing material that is not easily released or volatilized in a vacuum environment. Such sealing material is perfluoroelastomer (FFKM), fluororubber (FKM), fluorosilicone (FVMQ), hydrogenated nitrile butadiene rubber (HNBR), silicone rubber, etc., with silicone rubber being preferred.

[0045] The roughness of the bottom surface of the first support along 13 and the roughness of the first surface of the base 2 are within a first threshold range, and the flatness of the bottom surface of the first support along 13 and the flatness of the first surface of the base 2 are within a second threshold range. The first and second thresholds are set according to actual usage requirements, so as not to damage the first sealing ring and to ensure that the bottom surface of the first support along 13 and the first surface of the base 2 can make good contact to achieve sealing.

[0046] The first support edge 13 is connected to the base 2 by a plurality of first fasteners 8. The plurality of first fasteners 8 are symmetrically distributed at equal intervals along the circumference of the first support edge. The types of first fasteners 8 include clamps, sleeves, or screws.

[0047] For example, such as Figure 3 As shown, the first fastener 8 uses multiple screws, and multiple screw holes 81 corresponding to the screws are distributed at uniform angular intervals along the circumferential direction of the first support 13 for mounting multiple screws.

[0048] Since the overall strength is reduced after sealing with a sealing ring compared to welding, a radial first reinforcing rib 14 and a circumferential second reinforcing rib 15 can be provided on the umbrella-shaped cover 11 of the first sealing cover 1 to ensure that the overall strength meets the requirements.

[0049] In some possible designs, there are multiple radial first reinforcing ribs 14, which are arranged radially on the outer surface of the umbrella-shaped cover 11 at uniform angular intervals, with the center of the umbrella-shaped cover 11 as the center. The multiple first reinforcing ribs 14 are made of uniform material and have the same size and weight specifications.

[0050] In some possible designs, there are multiple second reinforcing ribs 15 in the circumferential direction. These multiple second reinforcing ribs 15 are concentric circles distributed at intervals on the outer surface of the umbrella-shaped cover 11 with the center of the umbrella-shaped cover 11 as the center. The multiple second reinforcing ribs 15 are made of the same material and have the same size and weight specifications.

[0051] The embodiments of this application do not limit the material and quantity of the radial first reinforcing rib 14 and the circumferential second reinforcing rib 15.

[0052] Multiple radial first stiffeners 14 are evenly distributed in the circumference and have the same size, so that the connection stiffness of the sealing cover is periodically symmetrically distributed, avoiding the introduction of asymmetric stiffness or asymmetric mass distribution by the supporting structure itself.

[0053] Multiple circumferential reinforcing ribs 15 increase the overall circumferential mass, thereby reducing the proportion of mass or stiffness disturbances caused by local machining errors in the overall equivalent mass and equivalent stiffness, thus reducing the equivalent mass difference and frequency fragmentation.

[0054] By connecting the second reinforcing rib 15 in the circumferential direction with multiple first reinforcing ribs 14 that are evenly distributed in the circumference and of the same size, the first sealing cover can simultaneously perform the functions of circumferential mass homogenization and connection stiffness symmetry. This ensures the long-term reliable operation of the internal high-speed rotor.

[0055] Second sealing mechanism B, as shown Figure 4 As shown, a second support edge 33 extends outward from the bottom of the sidewall 32. The bottom surface of the second support edge 33 is in close contact with and compacted with the second sealing ring 7 inside the second sealing groove 5.

[0056] The second sealing groove 5 is disposed on the frame of the second surface of the base 2. The cross-section of the second sealing groove 5 can be rectangular, semi-circular, arc-shaped or trapezoidal.

[0057] The second sealing ring 7 is disposed within the second sealing groove 5.

[0058] For example, a rectangular groove can be cut around the circumference of the frame on the second surface of the base 2 to accommodate the second sealing ring 7. Alternatively, a semi-circular groove can be cut around the circumference of the frame on the second surface of the base 2 to accommodate the second sealing ring 7. Or, a trapezoidal groove can be cut around the circumference of the frame on the second surface of the base 2 to accommodate the second sealing ring 7.

[0059] The size of the inner and outer rings of the second sealing ring 7 can be adapted to match the overall shape and dimensions of the product. To achieve a better sealing effect, the cross-sectional diameter of the second sealing ring 7 can be larger than the depth of the second sealing groove 5, and the difference between the two meets the requirements of tight fit and sealing performance.

[0060] The raw materials for the second sealing ring 7 must meet the following usage constraints: the material must not corrode or damage the supporting circuit board, nor produce harmful substances that could affect the normal operation of other satellite components.

[0061] In the satellite space environment, conventional rubber seals will release volatile pollutants; these pollutants will adhere to the surface of optical lenses, sensors, and solar panels, which will degrade the optical and electrical output performance of the equipment, and will also directly cause short circuit failures on the circuit board when deposited on the controller circuit board.

[0062] In some possible designs, the second sealing ring 7 can be made of a sealing material that is difficult to release or volatilize under vacuum conditions. Specifically, the sealing material can be perfluoroelastomer (FFKM), fluororubber (FKM), fluorosilicone (FVMQ), hydrogenated nitrile butadiene rubber (HNBR), silicone rubber, etc., with silicone rubber being preferred.

[0063] The umbrella-shaped cover 31 of the second sealing cover 3 has a side wall 32 at its bottom, and a second support edge 33 extends outward from the bottom of the side wall 32. The second sealing cover 3 covers the second surface of the base 2, and the bottom surface of the second support edge 33 is in close contact with and compacted with the second sealing ring 7 in the second sealing groove 5. The second sealing ring 7 makes the inner recess of the second sealing cover 3 and the second surface of the base 2 form a vacuum sealing system.

[0064] The roughness of the bottom surface of the second support along 33 and the roughness of the second surface of the base 2 are within a first threshold range, and the flatness of the bottom surface of the second support along 33 and the flatness of the second surface of the base 2 are within a second threshold range. The first threshold and the second threshold are set according to actual usage requirements, so as not to damage the second sealing ring and to ensure that the bottom surface of the second support along 33 and the second surface of the base 2 can make good contact to achieve sealing.

[0065] The second support edge 33 is connected to the base 2 by a plurality of second fasteners 9; the connection between the second surface of the base 2 and the second sealing cover 3 is detachable; the plurality of second fasteners 9 are symmetrically distributed at equal intervals along the circumferential direction of the second support edge. The types of second fasteners 9 include clamps, sleeves, or screws.

[0066] For example, such as Figure 5 As shown, the second fastener 9 uses multiple screws, and multiple screw holes 91 corresponding to the screws are distributed at uniform angular intervals along the circumferential direction of the first support 13 for mounting multiple screws.

[0067] Since the overall strength is reduced after sealing with a sealing ring compared to welding, a radial third reinforcing rib 34 and a circumferential fourth reinforcing rib 35 can be provided on the umbrella-shaped cover 31 of the second sealing cover 3 to ensure that the overall strength meets the requirements.

[0068] In some possible designs, there are multiple radial third reinforcing ribs 34, which are arranged radially on the outer surface of the umbrella-shaped cover 31 at uniform angular intervals, with the center of the umbrella-shaped cover 31 as the center. The multiple third reinforcing ribs 34 are made of uniform material and have the same size and weight specifications.

[0069] In some possible designs, there are multiple fourth reinforcing ribs 35 in the circumferential direction. These multiple fourth reinforcing ribs 35 are concentric circles distributed at intervals on the outer surface of the umbrella-shaped cover 31, with the center of the umbrella-shaped cover 31 as the center. The multiple fourth reinforcing ribs 35 are made of uniform material and have the same size and weight specifications.

[0070] The embodiments of this application do not limit the material and quantity of the radial third reinforcing rib 34 and the circumferential fourth reinforcing rib 35.

[0071] Multiple radial third reinforcing ribs 34 are evenly distributed circumferentially and have the same size, so that the connection stiffness of the second sealing cover is periodically symmetrically distributed, avoiding the introduction of asymmetric stiffness or asymmetric mass distribution by the supporting structure itself.

[0072] The fourth reinforcing rib 35 in multiple circumferential directions increases the overall circumferential mass, thereby reducing the proportion of mass or stiffness disturbances caused by local processing errors in the overall equivalent mass and equivalent stiffness, thus reducing the equivalent mass difference and frequency fragmentation.

[0073] The fourth reinforcing rib 35 in the circumferential direction is connected by multiple third reinforcing ribs 34 that are evenly distributed in the circumference and of the same size, so that the second sealing cover can simultaneously play the role of circumferential mass homogenization and connection stiffness symmetry. This ensures the long-term reliable operation of the internal high-speed rotor.

[0074] The base 2 is used to position and support the high-speed rotor of the control torque gyroscope.

[0075] The control torque gyroscope sealing structure provided in this application is simple and convenient to install, requires no special skills from operators, and can greatly improve production efficiency.

[0076] During installation, the use of sealing rings avoids the high temperatures associated with welding, preventing thermal deformation of the base and sealing cover and ensuring the original structural dimensional accuracy. This also prevents significant internal stress and ensures the safety and reliability of the internal circuit board and electronic components.

[0077] The control torque gyroscope sealing structure provided in this application uses a sealing ring for sealing, which can be repeatedly disassembled and reassembled. The disassembly and reassembly are convenient and facilitate debugging during the production process, thus solving the problem of multiple disassembly and reassembly during product debugging.

[0078] The control torque gyroscope sealing structure provided in this application will not result in secondary welding due to poor welding process, which greatly improves production efficiency and reduces the cost of the sealing ring.

[0079] The above is an introduction to the control torque gyroscope sealing structure provided in the embodiments of this application. All or part of any feature of any of the above embodiments can be freely and arbitrarily combined without contradiction; the combined technical solution is also within the scope of this application.

[0080] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0081] The content not described in detail in the embodiments of this application belongs to the common knowledge of those skilled in the art.

Claims

1. A sealing structure for controlling a torque gyroscope, characterized in that, include: The first sealing cover (1), the base (2), the first sealing groove (4), the first sealing ring (6) and the first fastener (8); The first sealing cover (1) covers the first surface of the base (2), and the umbrella-shaped cover (11) of the first sealing cover (1) has a side wall (12) below it; the bottom of the side wall (12) extends outward to form a first support edge (13); the bottom surface of the first support edge (13) is in close contact with and compacted with the first sealing ring (6) in the first sealing groove (4); the first sealing groove (4) is set on the frame of the first surface of the base (2); the first support edge (13) is fastened to the base (2) by a plurality of first fasteners (8); the plurality of first fasteners (8) are symmetrically distributed at equal intervals along the circumferential direction of the first support edge; The umbrella-shaped cover (11) of the first sealing cover (1) is provided with a radial first reinforcing rib (14) and a circumferential second reinforcing rib (15). The base (2) is used to position and support the high-speed rotor of the control torque gyroscope.

2. The sealing structure according to claim 1, characterized in that, The first sealing ring (6) is placed in the first sealing groove (4). The shape of the cross-section of the first sealing groove (4) includes rectangle, semicircle, arc or trapezoid. The diameter of the cross-section of the first sealing ring (6) is greater than the depth of the first sealing groove (4), and the difference between the two satisfies the requirement of tight fit.

3. The sealing structure according to claim 1, characterized in that, The sealing structure also includes a second sealing cover (3), a second sealing groove (5), a second sealing ring (7), and a second fastener (9); The second sealing cover (3) covers the lower part of the second surface of the base (2), and the umbrella-shaped cover (31) of the second sealing cover (3) has a side wall (32) below it; the bottom of the side wall (32) extends outward to form a second support edge (33); the bottom surface of the second support edge (33) is in close contact with and compacted with the second sealing ring (7) in the second sealing groove (5); the second sealing groove (5) is set on the edge of the second surface of the base (2); the second support edge (33) is fastened to the base (2) by a plurality of second fasteners (9); the plurality of second fasteners (9) are symmetrically distributed at equal intervals along the circumferential direction of the second support edge; The second sealing cover (3) has a radial third reinforcing rib (34) and a circumferential fourth reinforcing rib (35) on its umbrella-shaped cover (31).

4. The sealing structure according to claim 3, characterized in that, The second sealing ring (7) is placed in the second sealing groove (5), and the shape of the cross-section of the second sealing groove (5) includes rectangle, semicircle, arc or trapezoid; The cross-sectional diameter of the second sealing ring (7) is greater than the depth of the second sealing groove (5), and the difference between the two satisfies the requirement of tight fit.

5. The sealing structure according to claim 1, characterized in that, The material of the first sealing ring (6) is a sealing material that is difficult to release or volatilize under vacuum conditions. The sealing material that is difficult to release or volatilize under vacuum conditions is perfluoroether rubber, fluororubber, fluorosilicone rubber, hydrogenated nitrile rubber or silicone rubber.

6. The sealing structure according to claim 3, characterized in that, The material of the second sealing ring (7) is a sealing material that is difficult to release or volatilize under vacuum conditions. The sealing material that is difficult to release or volatilize under vacuum conditions is perfluoroether rubber, fluororubber, fluorosilicone rubber, hydrogenated nitrile rubber or silicone rubber.

7. The sealing structure according to claim 1, characterized in that, The first fastener (8) is a clamp, sleeve or screw.

8. The sealing structure according to claim 3, characterized in that, The second fastener (9) is a clamp, sleeve or screw.

9. The sealing structure according to claim 1, characterized in that, The roughness of the bottom surface of the first support (13) and the roughness of the first surface of the base (2) are within a first threshold range, and the flatness of the bottom surface of the first support (13) and the flatness of the first surface of the base (2) are within a second threshold range.

10. The sealing structure according to claim 3, characterized in that, The roughness of the bottom surface of the second support (33) and the roughness of the second surface of the base (2) are within a first threshold range, and the flatness of the bottom surface of the second support (33) and the flatness of the second surface of the base (2) are within a second threshold range.

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