Rotary seal structure for heavy ion accelerator

Abstract

The present application relates to the technical field of accelerator, and particularly relates to a rotary sealing structure for a heavy ion accelerator. The rotary sealing structure comprises: a first rotary ring, an inner circumferential wall of the first rotary ring is provided with a first groove extending along a circumference; a second rotary ring, an outer circumferential wall of the second rotary ring is provided with a second groove extending along a circumference; wherein the first rotary ring is rotatably nested in the second groove, and the first groove and the second groove jointly enclose a closed annular cavity; the outer circumferential wall of the first rotary ring and the inner circumferential wall of the second rotary ring are both provided with openings for enabling a terminal experiment platform and a beam guiding mechanism to communicate with the annular cavity. In the present application, the structure of the first rotary ring and the second rotary ring is optimized, so that the annular cavity is kept sealed when the two rotate relative to each other, and the beam guiding mechanism and the terminal experiment platform can be continuously connected in vacuum by using the rotary sealing structure.

Description

Technical Field

[0001] This invention relates to the field of accelerator technology, and in particular to a rotary sealing structure for heavy ion accelerators. Background Technology

[0002] In recent years, heavy ion accelerators have been increasingly widely used in high-energy physics, cutting-edge medicine, materials science, life sciences, and nuclear waste transmutation research. However, the number of heavy ion accelerators available in China is limited, and the ever-increasing demand cannot be met in the short term. Furthermore, considering that in actual operation, terminal experimental platforms often require instrument preparation and mid-experiment adjustments, making continuous beam supply to a specific experimental platform difficult, results in low system utilization.

[0003] Therefore, a rotating beam supply system was designed: such as Figure 1 As shown, multiple terminal experimental platforms are arranged along a circumference, and a guiding mechanism is set at the center of the circumference to guide the magnet, vacuum, beam diagnostic and mechanical systems to rotate along the axis, forming a rotatable beam transmission line system, so that the beam can be connected to any experimental platform through the guiding mechanism and used for experiments.

[0004] Currently, the common approach to solving this type of docking problem is to use a membrane window extraction-atmosphere passage-membrane window introduction method, where the beam guiding mechanism and each terminal experimental platform are independent vacuum systems. Simultaneously, both the beam guiding mechanism and the terminal experimental platform have a membrane window at their respective docking ends. These are spaced apart to ensure smooth rotation of the beam guiding mechanism. When the beam guiding mechanism supplies beam to the terminal experimental platform, the beam exits through the membrane window of the beam guiding mechanism, passes through a section of air, and then enters through the membrane window of the terminal experimental platform.

[0005] Because the beam passes through two sets of membrane windows and a section of air, it experiences significant energy loss, scattering, and neutron yield, which in turn affects the accuracy of the experimental results. Therefore, it is urgent to optimize and improve the docking structure between the beam guiding mechanism and the terminal experimental platform to enhance beam quality and stability. Summary of the Invention

[0006] This invention proposes a rotary sealing structure for heavy ion accelerators to address the drawback of beam guidance mechanisms supplying beams to the terminal experimental platform, where the beam must pass through two sets of membrane windows and a section of air, adversely affecting the accuracy of experimental results. This invention ensures that after docking the beam guidance mechanism and the terminal experimental platform, the beam channel is a completely continuous vacuum environment, effectively avoiding the significant energy loss, scattering, and neutron yield caused by vacuum membrane window docking, thus improving experimental precision.

[0007] This invention provides a rotary sealing structure for heavy ion accelerators, comprising:

[0008] A first rotating ring, wherein the inner peripheral wall of the first rotating ring is provided with a first groove extending in the circumferential direction;

[0009] The second rotating ring has a second groove extending circumferentially on its outer peripheral wall;

[0010] The first rotating ring is rotatably nested within the second groove, and the first groove and the second groove together form a closed annular cavity.

[0011] It also includes a sealing component disposed between the end face of the first rotating ring and the groove wall of the second groove, for ensuring the sealing of the annular cavity when the first rotating ring rotates relative to the second rotating ring;

[0012] Both the outer peripheral wall of the first rotating ring and the inner peripheral wall of the second rotating ring are provided with openings to allow the terminal experimental platform, the beam guiding mechanism and the annular cavity to communicate.

[0013] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the sealing assembly comprises:

[0014] A guide ring, wherein the first end face of the guide ring is slidably connected to the end face of the first rotating ring, and the second end face of the guide ring is fixedly connected to the groove wall of the second groove;

[0015] The first sealing ring is disposed between the end faces of the guide ring and the first rotating ring;

[0016] The second sealing ring is disposed between the guide ring and the groove wall of the second groove.

[0017] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein a sealing groove is provided on the end face of the first rotary ring, and the sealing groove extends along the circumference of the first rotary ring.

[0018] The first end face of the guide ring is provided with a rib, which extends along the circumference of the guide ring.

[0019] Two first sealing rings are installed in the sealing groove, and the rib is inserted between the two first sealing rings. A first gap is formed between the rib, the first sealing rings and the sealing groove.

[0020] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the first rotary ring is provided with a first channel, and the first channel extends radially within the side wall of the first rotary ring.

[0021] One end of the first channel extends to the outer peripheral wall of the first rotating ring to communicate with the outside, and the other end of the first channel extends to the bottom of the sealing groove and communicates with the first gap, for drawing gas from the first gap to form a secondary vacuum.

[0022] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the second rotary ring is provided with a groove extending circumferentially, and two grooves are arranged at intervals on the groove wall of the second groove.

[0023] Two second sealing rings are embedded in the slots in a corresponding manner. The second end face of the guide ring abuts against the second sealing ring. A second gap is formed between the groove wall of the second groove, the second sealing ring and the guide ring.

[0024] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the second rotary ring is provided with a second channel, the second channel extending along the axial direction of the second rotary ring within the side wall of the second rotary ring;

[0025] One end of the second channel extends to the end face of the second rotating ring to communicate with the outside, and the other end of the second channel extends to the groove wall of the second groove and communicates with the second gap, for drawing gas in the second gap to form a secondary vacuum.

[0026] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the surface roughness of the guide ring is less than 0.8 μm.

[0027] According to the present invention, a rotary sealing structure for a heavy ion accelerator further includes a mating flange suspended on the outer circumferential side of the first rotating ring and / or the inner circumferential side of the second rotating ring, the mating flange comprising:

[0028] A flange plate, wherein the outer peripheral wall of the flange plate is cylindrical;

[0029] The cantilever tube has one end connected to the opening and the other end connected to the flange plate.

[0030] According to the present invention, a rotary sealing structure for a heavy ion accelerator is provided, wherein the end face of the flange plate is provided with a positioning groove, and the bottom of the positioning groove is provided with a plurality of connecting holes distributed on the same circumference.

[0031] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0032] By optimizing the structure of the first and second rotating rings, a ring cavity is formed between them and remains sealed during relative rotation. This rotating sealing structure allows the beam guiding mechanism to be easily docked with multiple terminal experimental platforms, overcoming the drawbacks of existing technologies that use a membrane window extraction-atmosphere passage-membrane window introduction method, which causes energy loss, scattering, and neutron yield. This improves beam quality and stability, and enhances experimental accuracy. Furthermore, it integrates the beam guiding mechanism with the vacuum systems of multiple terminal experimental platforms, achieving complete continuity of the vacuum system.

[0033] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or will be learned through the practice of the present invention. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural diagram of a beam supply system provided in an embodiment of the present invention.

[0036] Figure 2 This is a three-dimensional schematic diagram of the rotary sealing structure provided in an embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of the rotary sealing structure provided in an embodiment of the present invention.

[0038] Figure 4 for Figure 3 Enlarged schematic diagram of a partial view in section E.

[0039] Figure 5 This is a radial cross-sectional view of the rotary sealing structure provided in an embodiment of the present invention.

[0040] Figure 6 for Figure 5 Enlarged schematic diagram of a partial view of F.

[0041] Figure 7 A radial cross-sectional view of a first rotating ring provided in an embodiment of the present invention.

[0042] Figure 8 A radial cross-sectional view of the second rotating ring provided in an embodiment of the present invention.

[0043] Figure 9 This is a schematic diagram of the assembly of the rotary sealing structure provided in an embodiment of the present invention.

[0044] Figure label:

[0045] 1. Terminal experimental platform; 2. Protective wall; 3. Beam guiding mechanism; 4. Rotary sealing structure; 5. Annular cavity; 10. First rotating ring; 11. First groove; 12. Sealing groove; 13. First channel; 20. Second rotating ring; 21. Second groove; 22. Slot; 23. Second channel; 30. Sealing assembly; 31. Guide ring; 311. Raised rib; 32. First sealing ring; 33. Second sealing ring; 40. Connecting flange; 41. Flange plate; 411. Positioning groove; 42. Cantilever tube. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] In existing technologies, the docking structure between the beam guiding mechanism and the terminal experimental platform generally adopts the following method: Both the beam guiding mechanism and the terminal experimental platform have separate sealing structures to maintain a vacuum environment. Each of the beam guiding mechanism and the terminal experimental platform has a membrane window at its respective docking end. When the beam guiding mechanism and the terminal experimental platform are docked, their membrane windows are spaced apart to ensure smooth rotation of the beam guiding mechanism. When the beam guiding mechanism supplies the beam to the terminal experimental platform, the beam exits through the membrane window of the beam guiding mechanism, passes through a short section of air, and then enters through the membrane window of the terminal experimental platform. However, this method of beam supply requires the beam to pass through two sets of membrane windows and a short section of air, resulting in significant energy loss, scattering, and neutron yield, which adversely affects the experimental results.

[0048] Therefore, an embodiment of the present invention describes a rotating beam supply system. For example... Figure 1 As shown, a circular protective wall 2 is set up, and multiple terminal experimental platforms 1 are installed on the outer periphery of the protective wall 2 and distributed along the circumference. A rotary sealing structure 4 is installed on the inner periphery of the protective wall 2, and then the terminal experimental platforms 1 are connected to the rotary sealing structure 4.

[0049] The heavy ion accelerator is positioned at the central axis of the protective wall 2. A beam guiding mechanism 3, capable of rotating around the central axis of the protective wall 2, is then installed. One end of the beam guiding mechanism 3 is rotatably connected to the heavy ion accelerator, and the other end is connected to the rotary sealing structure 4. This allows the heavy ion accelerator to supply beams to any terminal experimental platform 1 via the beam guiding mechanism 3. While one terminal experimental platform 1 receives the beam for experiments, other terminal experimental platforms 1 can still freely operate and complete their experimental preparations and adjustments.

[0050] In one embodiment of the present invention, a rotary sealing structure 4 for a heavy ion accelerator is described.

[0051] like Figures 2 to 4 As shown, the rotary sealing structure 4 mainly includes a first rotary ring 10 and a second rotary ring 20.

[0052] The inner peripheral wall of the first rotating ring 10 is provided with a first groove 11 extending circumferentially. The outer peripheral wall of the second rotating ring 20 is provided with a second groove 21 extending circumferentially.

[0053] The first rotating ring 10 is rotatably nested within the second groove 21. The first groove 11 and the second groove 21 together form a closed annular cavity 5.

[0054] Both the outer peripheral wall of the first rotating ring 10 and the inner peripheral wall of the second rotating ring 20 are provided with openings to allow the terminal experimental platform 1, the beam guiding mechanism 3, and the annular cavity 5 to communicate. Thus, the vacuum structure of the terminal experimental platform 1 and the vacuum structure of the beam guiding mechanism 3 can be spliced ​​into a single integrated vacuum system through the rotating sealing structure 4, achieving vacuum continuity between the terminal experimental platform 1 and the beam guiding mechanism 3.

[0055] Furthermore, the first rotating ring 10 and the second rotating ring 20 are manufactured using CNC machine tool precision machining technology. The concentricity error between the first groove 11 and the second groove 21 is controlled within ±0.02mm. When the two rotate relative to each other, the first groove 11 and the second groove 21 always remain sealed, which can maintain a certain vacuum degree in the annular cavity 5. Furthermore, the rotating sealing structure 4 also includes a sealing assembly 30.

[0056] like Figures 6 to 8 As shown, the sealing component 30 is disposed between the end face of the first rotating ring 10 and the groove wall of the second groove 21, and is used to ensure the sealing of the annular cavity 5 when the first rotating ring 10 rotates relative to the second rotating ring 20.

[0057] Specifically, the sealing assembly 30 includes a guide ring 31, a first sealing ring 32, and a second sealing ring 33. The first end face of the guide ring 31 is slidably connected to the end face of the first rotating ring 10. The second end face of the guide ring 31 is fixedly connected to the groove wall of the second groove 21.

[0058] The first sealing ring 32 is disposed between the guide ring 31 and the end face of the first rotating ring 10. The second sealing ring 33 is disposed between the guide ring 31 and the groove wall of the second groove 21. Furthermore, the first sealing ring 32 and the second sealing ring 33 are made of perfluoroether rubber (FFKM) material, which can maintain good elasticity and sealing performance under high temperature, high vacuum and strong radiation environments.

[0059] Furthermore, the first rotating ring 10, the second rotating ring 20, and the guide ring 31 are all made of aluminum alloy 7075. This material not only has excellent mechanical strength and lightweight characteristics, but also has a low coefficient of thermal expansion, which can maintain dimensional stability during accelerator operation.

[0060] To further enhance its surface hardness and wear resistance, the contact surfaces between the first rotating ring 10, the second rotating ring 20, and the guide ring 31 are all subjected to hard anodizing treatment to form an oxide layer with a thickness of not less than 25 μm, which significantly enhances its wear resistance under high-speed rotation conditions.

[0061] Furthermore, the first rotating ring 10, the second rotating ring 20, and the guide ring 31 are precision machined according to the design dimensions. Specifically, the surface roughness of the contact points between the first rotating ring 10 and the guide ring 31 must be controlled to be less than 0.8 μm. The surface roughness of the contact points between the second rotating ring 20 and the guide ring 31 must be controlled to be less than 0.8 μm. The surface roughness of the contact point between the guide ring 31 and the first sealing ring 32 must be controlled to be less than 0.8 μm.

[0062] Preferably, the surface roughness of all outer surfaces of the guide ring 31 is less than 0.8 μm.

[0063] Furthermore, the rotary sealing structure 4 also includes a mating flange 40 suspended on the outer periphery of the first rotary ring 10, and / or a mating flange 40 suspended on the inner periphery of the second rotary ring 20.

[0064] Preferably, a mating flange 40 is provided on the outer circumference of the first rotating ring 10 and the inner circumference of the second rotating ring 20.

[0065] The docking flange 40 includes a flange plate 41 and a cantilever pipe 42. The outer peripheral wall of the flange plate 41 is cylindrical.

[0066] One end of the cantilever tube 42 is connected to the opening. The other end of the cantilever tube 42 is connected to the flange plate 41.

[0067] To enable rapid docking and ensure accurate positioning of the rotary sealing structure 4 with the beam guiding mechanism 3 and the terminal experimental platform 1, a positioning groove 411 is provided on the end face of the flange plate 41. The bottom of the positioning groove 411 has several connecting holes distributed on the same circumference.

[0068] Furthermore, the cantilever tube 42 of the docking flange 40 and the flange plate 41 are integrally molded, which can ensure the sealing reliability of the connection area. In this embodiment, by optimizing the structure of the first rotating ring 10 and the second rotating ring 20, the two form an annular cavity 5 and keep the annular cavity 5 sealed when rotating relative to each other. The rotating sealing structure 4 can not only facilitate the docking of the beam guiding mechanism 3 with multiple terminal experimental platforms 1, but also integrate the beam guiding mechanism 3 with the vacuum system of multiple terminal experimental platforms 1 into one, avoiding beam loss.

[0069] Based on the above embodiments, another embodiment of the present invention introduces a rotary sealing structure 4 for a heavy ion accelerator.

[0070] like Figures 5 to 9 As shown, to improve the sealing performance at the connection point between the first rotating ring 10 and the second rotating ring 20, a sealing groove 12 is provided on the end face of the first rotating ring 10. The sealing groove 12 extends circumferentially along the first rotating ring 10. A protruding rib 311 is provided on the first end face of the guide ring 31. The protruding rib 311 extends circumferentially along the guide ring 31.

[0071] Two first sealing rings 32 are installed in the sealing groove 12. The protruding rib 311 is inserted between the two first sealing rings 32. A first gap is formed between the protruding rib 311, the first sealing rings 32 and the sealing groove 12.

[0072] Furthermore, the first rotating ring 10 is provided with a first channel 13. The first channel 13 extends radially within the sidewall of the first rotating ring 10.

[0073] One end of the first channel 13 extends to the outer peripheral wall of the first rotating ring 10 to communicate with the outside. The other end of the first channel 13 extends to the bottom of the sealing groove 12 and communicates with the first gap. In this way, gas in the first gap can be drawn out through the first channel 13 to form a secondary vacuum, thereby improving the dynamic sealing performance and vacuum performance between the first rotating ring 10 and the guide ring 31.

[0074] Furthermore, the second rotating ring 20 is also provided with a slot 22 extending circumferentially. Two slots 22 are arranged at intervals on the groove wall of the second groove 21.

[0075] Two second sealing rings 33 are embedded in the slots 22 in a corresponding manner. The second end face of the guide ring 31 abuts against the second sealing ring 33, and a second gap is formed between the groove wall of the second groove 21, the second sealing ring 33 and the guide ring 31.

[0076] Furthermore, the second rotating ring 20 is provided with a second channel 23. The second channel 23 extends along the axial direction of the second rotating ring 20 within the side wall of the second rotating ring 20.

[0077] One end of the second channel 23 extends to the end face of the second rotating ring 20 to communicate with the outside. The other end of the second channel 23 extends to the groove wall of the second groove 21 and communicates with the second gap. In this way, gas in the second gap can be drawn through the second channel 23 to form a secondary vacuum, thereby improving the static sealing performance and vacuum performance between the second rotating ring 20 and the guide ring 31.

[0078] Furthermore, the guide ring 31 has threaded holes on both sides of the rib 311, and the second rotating ring 20 has through holes on its sidewall for fixing the guide ring 31, thus simplifying the connection structure between the guide ring 31 and the second rotating ring 20. When the first sealing ring 32 needs to be replaced for maintenance, the second rotating ring 20 can be easily removed from the first rotating ring 10.

[0079] When connecting the guide ring 31 and the second rotating ring 20, the fixing bolt passes through the through hole of the second rotating ring 20 and connects with the threaded hole on the guide ring 31.

[0080] In this embodiment, the connection points between the guide ring 31 and the first and second rotating rings all employ a double-layer sealing structure. Furthermore, by drawing gas into the double-layer sealing structure, a secondary vacuum is created, ensuring a gas leakage rate of less than 5 × 10⁻⁶. -9 mbar.L / s ensures a stable vacuum environment.

[0081] Based on the above embodiments, another embodiment of the present invention introduces a method for manufacturing a rotary sealing structure. The manufacturing method includes:

[0082] Machining the first rotating ring 10 and the second rotating ring 20: The first rotating ring 10 and the second rotating ring 20 are machined according to the rubber sealing flange design standard. A mating flange 40 is installed on the first rotating ring 10 and the second rotating ring 20 respectively, and a positioning groove 411 is opened on the end face of the flange plate 41 for positioning and connection with the interface of the beam guiding mechanism 3 and the terminal experimental platform 1. Simultaneously, the sealing surface of the flange plate 41 is precision machined to make its surface roughness less than 0.8μm.

[0083] A sealing groove 12 is machined on the first rotating ring 10: the sealing groove 12 is machined according to the designed dimensions and precision. The surface roughness of the contact position between the sealing groove 12 and the first sealing ring 32 must be strictly controlled to be less than 0.8μm. A first channel 13 is machined in the area between the two first sealing rings 32. The first sealing rings 32 are made of self-lubricating material to reduce frictional resistance.

[0084] A groove 22 is machined on the second rotating ring 20: the groove 22 is machined according to the designed dimensions and precision. The surface roughness of the contact position between the groove 22 and the second sealing ring 33 must be strictly controlled to be less than 0.8μm. A second channel 23 is machined in the area between the two second sealing rings 33. The second sealing rings 33 are made of self-lubricating material to reduce frictional resistance.

[0085] Machining guide ring 31: The guide ring 31 is machined strictly according to the designed dimensions and precision. The surface roughness of the guide ring 31 at the contact position with the first and second sealing rings is controlled to be less than 0.8μm. Threaded holes are machined on both sides of the rib 311 for detachable connection with the second rotating ring 20, which facilitates quick replacement of the second sealing ring 33.

[0086] Measurement dimensions and accuracy: The main structural dimensions and accuracy of the first rotating ring 10, the second rotating ring 20 and the guide ring 31 are measured using a coordinate measuring machine.

[0087] Ultrasonic cleaning and vacuum degassing: Ultrasonic cleaning removes surface oil and contaminants from components such as the first rotating ring 10, the second rotating ring 20, and the guide ring 31. Following this, surface anodizing is performed to fix the color, and the process is carried out under a vacuum of less than 1×10⁻⁶. -3 The material is placed in a furnace at 400°C and held for 2 hours to remove surface impurities, eliminate internal stress, improve plasticity and restore the ductility of the material, and ensure the structural performance and pressure resistance.

[0088] Finally, the first rotating ring 10, the second rotating ring 20, and the guide ring 31 are assembled together. After fixing the first rotating ring 10, the rotation function of the entire structure is tested and leaks are checked to ensure that the leak rate is less than 5 × 10⁻⁶. -9 mbar.L / s, overall vacuum maintained at 10 mbar.L / s -8 mbar.

[0089] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0091] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms are not limited to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary seal structure for a heavy ion accelerator, characterized by, The utility model relates to a terminal experiment platform (1) and beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) are communicated with ring cavity (5) for the first rotating circular ring (10) and the second rotating circular ring (20) are arranged in the ring cavity (5) of the terminal experiment platform (1) and the beam current guide mechanism (3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The rotary seal structure for a heavy ion accelerator according to claim 1, wherein ​ ​ 3. The rotary seal structure for a heavy ion accelerator according to any one of claims 1 or 2, characterized by, ​ Two second sealing rings (33) are embedded in the card slot (22) one by one, the second end surface of the guide circular ring (31) abuts against the second sealing ring (33), and the second gap is formed between the groove wall of the second groove (21), the second sealing ring (33) and the guide circular ring (31).

4. The rotary seal structure for a heavy ion accelerator according to claim 3, wherein The second rotating circular ring (20) is provided with a second channel (23) extending in the axial direction of the second rotating circular ring (20) in the side wall of the second rotating circular ring (20). One end of the second channel (23) extends to the end surface of the second rotating circular ring (20) to communicate with the outside, and the other end of the second channel (23) extends to the groove wall of the second groove (21) and communicates with the second gap, for pumping the gas in the second gap to form a secondary vacuum.

5. The rotating seal structure for a heavy ion accelerator according to claim 4, wherein The surface roughness of the guide circular ring (31) is less than 0.8 μm.

6. The rotating seal structure for a heavy ion accelerator according to claim 5, wherein Further comprising a butt flange (40) suspended on the outer circumferential side of the first rotating circular ring (10) and / or the inner circumferential side of the second rotating circular ring (20), the butt flange (40) comprises: A flange plate (41), the outer circumferential wall of the flange plate (41) is cylindrical; A cantilever pipe (42), one end of the cantilever pipe (42) is connected with the opening, and the other end of the cantilever pipe (42) is connected with the flange plate (41).

7. The rotating seal structure for a heavy ion accelerator according to claim 6, wherein The end surface of the flange plate (41) is provided with a positioning groove (411), and the groove bottom of the positioning groove (411) is provided with a plurality of connection holes distributed on the same circumference.

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