An optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions

Abstract

The present invention relates to the technical field of magnetic confinement controlled nuclear fusion research, and in particular to an optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions, comprising a support plate, a radial rotation support seat and a traction member, wherein a radial rotation axis is rotatably connected to the radial rotation support seat, and polar rotation support seats are arranged at both ends of the radial rotation axis, and a plane mirror is rotatably arranged on the polar rotation support seat; the traction member is arranged on the plane mirror and the polar rotation support seat, and the upper end of the traction member extends upward out of the antenna cavity and is connected to a driving mechanism arranged above the antenna cavity, and driven by the driving mechanism, the plane mirror is driven to rotate in the polar direction, or the polar rotation support seat is driven to rotate the plane mirror in the radial direction; the present invention can be applicable to the adjustment requirements of optical mirrors in ultra-high vacuum and strong magnetic field environments, has the ability to maintain high vacuum, and has the ability to resist the influence of electromagnetic force caused by changes in the strong magnetic field environment on the steering structure of the plane mirror.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic confinement controlled nuclear fusion research, and in particular to an optical mirror adjustment mechanism suitable for use under ultra-high vacuum and strong magnetic field conditions. Background Art

[0002] In the field of magnetic confinement controlled nuclear fusion research, electron cyclotron resonance heating (ECRH) is a significant heating method, which is widely used in secondary heating to achieve local heating of electrons. ECRH system is used as the main heating method in international tokamaks and the International Thermonuclear Experimental Reactor.

[0003] In the ECRH system, the main functions of the antenna system include the emission of electron cyclotron waves and the coupling of electron cyclotron waves after mirror reflection. This part will directly distribute the power deposition and driving current of microwaves, so the structural design of the antenna system is one of the important links of the entire high-power RF heating unit.

[0004] The antenna system design in the ECRH system adopts the quasi-optical principle. Through the combined use of two sets of ellipsoidal mirrors and plane mirrors, the electron cyclotron wave is emitted into the plasma in the specified area, thereby obtaining the best effect of plasma heating. Considering that the ellipsoidal mirror mainly plays a focusing role, in order to achieve the accurate emission of electron cyclotron waves to different positions in the plasma area, it is necessary to add polar and circumferential adjustment and rotation mechanisms to the plane mirror. Therefore, the multi-directional position adjustment of these optical elements has become an important condition in the design of the antenna system.

[0005] The multi-directional position adjustment design of the plane mirror must also meet the high vacuum protection requirements. At the same time, due to the size limitation of the antenna system and the expectation that the adjustment range of the plane mirror is large enough, in order to avoid interference in the antenna cavity, high requirements are also placed on the compactness of the structure during the design process. Due to the high vacuum and strong magnetic field environment, the conditions for personnel to make direct contact operations for adjustment are limited, so it is necessary to operate through automated equipment, which puts forward requirements for the compatibility of remote operation of the product. Summary of the invention

[0006] In view of the problems in the prior art, the object of the present invention is to provide an optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions to meet the needs of electron cyclotron resonance heating.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An optical mirror adjustment mechanism suitable for use under ultra-high vacuum and strong magnetic field conditions, used to adjust a plane mirror disposed in an antenna cavity, the adjustment mechanism comprising:

[0009] A support plate, provided with two parallel and spaced apart, arranged in the antenna cavity;

[0010] A radial rotation support seat is arranged at the lower ends of the two support plates, a radial rotation shaft is rotatably connected to the radial rotation support seat, polar rotation support seats are respectively arranged at both ends of the radial rotation shaft, and the plane mirror is rotatably arranged on the polar rotation support seat; and,

[0011] A traction member, wherein the traction member is arranged on the plane mirror and the polar rotation support seat located at both ends of the radial rotation axis, and the upper end of the traction member extends upward out of the antenna cavity and is connected to a driving mechanism arranged above the antenna cavity, and driven by the driving mechanism, the plane mirror is driven to rotate in the polar direction around the hinge axis between the plane mirror and the polar rotation support seat, or the polar rotation support seat is driven to rotate the plane mirror in the radial direction.

[0012] In a further technical solution, the driving mechanism includes:

[0013] A driving source, arranged above the antenna cavity, for providing power;

[0014] A vacuum welded bellows is vertically extended and arranged above the antenna cavity, the upper end of the vacuum welded bellows is assembled and fixed to the output end of the driving source via a sealing copper ring and a sealing blind flange, and the bottom end of the vacuum welded bellows is assembled and fixed to the sealing blind flange on the antenna cavity via a sealing copper ring;

[0015] The upper end of the traction member is fixed to the inner side of the upper end of the vacuum welding bellows, and driven by a driving source, the vacuum welding bellows is extended and retracted and the traction member is driven to rise or fall.

[0016] In a further technical solution, the driving source is a driving motor, a vertically extending support seat is provided on the side of the vacuum welded bellows, a vertically extending optical axis is provided on the side of the support seat, the upper end of the optical axis is fixed to the upper end of the support seat via the optical axis seat, and the bottom end of the optical axis is fixed to the top of the antenna cavity via the optical axis seat;

[0017] A screw rod is rotatably arranged on the support seat, and the screw rod is drivingly connected to the output shaft of the drive motor; a connecting plate is threadedly connected to the rod body of the screw rod, one end of the connecting plate is sleeved on the optical axis, and the other end is fixed to the upper end of the vacuum welding bellows.

[0018] In a further technical solution, the upper end of the screw rod is installed on the support seat via a bearing cover plate and a bearing, and the lower end is installed on the top of the antenna cavity via a bearing and a support bottom plate.

[0019] In a further technical solution, the screw is fixed to the connecting plate via a screw nut, and the connecting plate is sleeved on the optical axis via an optical axis bushing.

[0020] In a further technical solution, the upper end of the traction member passes through a protective cover arranged on the top of the antenna cavity and extends and is fixed to the inner side of the upper end of the vacuum welded bellows.

[0021] In a further technical solution, polar rotation support blocks are respectively extended from both ends of the polar rotation support seat to the side away from the radial rotation support seat, and the two sides of the plane mirror are respectively fixedly connected to the polar rotation parts by bolts, and then mounted on the polar rotation support blocks at both ends of the polar rotation support seat together with the first bearing assembly.

[0022] In a further technical solution, the bottom end of the traction member is connected to a polar rotation support block at one end of a polar rotation support seat by means of bolts.

[0023] In a further technical solution, a limiting sleeve is provided on the support plate, and a traction member fixed on the polar rotation support block and the plane mirror passes through the limiting sleeve and then extends upward.

[0024] In a further technical solution, a pressure plate is sleeved on the shaft body of the radial rotating shaft, and the pressure plate is fixed to the radial rotating support seat by bolts.

[0025] In a further technical solution, washers are provided at both ends of the radial rotating shaft, the polar rotating support seat is fixed to the washers via a second bearing assembly, and washers are locked and fixed to both sides by bolts.

[0026] Compared with the prior art, the present invention has the following technical effects:

[0027] 1. The optical mirror adjustment mechanism provided by the present invention can be applied to the adjustment requirements of the optical mirror in ultra-high vacuum and strong magnetic field environments, has the ability to maintain high vacuum, and has the ability to resist the influence of electromagnetic force caused by changes in the strong magnetic field environment on the plane mirror steering structure;

[0028] 2. The optical mirror adjustment mechanism provided by the present invention converts the rotation of the plane mirror into the up and down movement of the traction member by installing and connecting the traction member on the plane mirror and the polar rotation support seat, that is, different installation points of the traction member, and completes the up and down reciprocating movement of the traction member in combination with the deformation adaptability of the vacuum welded bellows; and the use of multiple sets of traction members to pull to meet the requirements of driving multiple sets of plane mirrors for multi-directional rotation adjustment;

[0029] 3. In the future research field of magnetic confinement controlled nuclear fusion, the structural design will develop towards compactness, and the space left for the electron cyclotron resonance heating antenna part will become smaller and smaller. The optical mirror adjustment mechanism provided by the present invention adopts the simplest traction part pulling structure in the process of mechanism design, which has great advantages in space layout.

[0030] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A cross-sectional view of an optical mirror adjustment mechanism suitable for use in ultra-high vacuum and strong magnetic field conditions is shown according to a specific embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram showing the structure of the driving mechanism in the present invention;

[0033] Figure 3 A schematic diagram showing a structural component for driving a plane mirror to rotate in the present invention;

[0034] Figure 4 A schematic diagram showing a structural component for driving the plane mirror to rotate in the polar direction in the present invention;

[0035] Figure 5 It is a schematic diagram showing the structural components for driving the plane mirror to rotate radially in the present invention;

[0036] Explanation of the numbers in the figure: 1. antenna cavity; 101. protective cover; 2. plane mirror; 201. polar rotation member; 202. first bearing assembly; 10. support plate; 11. limiting sleeve; 20. radial rotation support seat; 21. radial rotation axis; 22. pressure plate; 23. gasket sleeve; 24. gasket; 30. polar rotation support seat; 31. polar rotation support block; 32. second bearing assembly; 40. traction member; 50. driving source; 60. vacuum welding bellows; 61. sealing copper ring; 62. sealing blind flange; 70. support seat; 71. screw; 711. bearing cover plate; 712. bearing; 713. support base plate; 714. screw nut; 80. optical axis; 81. optical axis seat; 90. connecting plate; 91. optical axis bushing. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific drawings.

[0038] It should be noted that, in the present invention, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] As mentioned above, combined with Figure 1 , 3 As shown, the present invention provides an optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions, which is used to adjust a plane mirror 2 disposed in an antenna cavity 1, and the adjustment mechanism includes a support plate 10, a radial rotation support seat 20 and a traction member 40;

[0041] The support plates 10 are provided with two and are arranged in parallel and spaced apart in the antenna cavity 1; specifically, mounting plates are provided at both ends of the two support plates 10, and the mounting plates are fixed to the inner wall of the antenna cavity 1 by bolts.

[0042] The radial rotation support seat 20 is arranged at the lower end of the two support plates 10, and a radial rotation shaft 21 is rotatably connected to the radial rotation support seat 20. Both ends of the radial rotation shaft 21 are respectively provided with polar rotation support seats 30, and the plane mirror 2 is rotatably arranged on the polar rotation support seat 30;

[0043] The traction member 40 is arranged on the plane mirror 2 and the polar rotation support seat 30 located at both ends of the radial rotation axis 21, and the upper end of the traction member 40 extends upward from the antenna cavity 1, and is connected to the driving mechanism arranged above the antenna cavity 1, and is driven by the driving mechanism to drive the plane mirror 2 to rotate in the polar direction around the hinge axis between it and the polar rotation support seat 30, or drives the polar rotation support seat 30 to rotate the plane mirror 2 in the radial direction.

[0044] In the present invention, the traction member 40 may be a steel wire rope; in addition, due to the high vacuum and strong magnetic field environment, the related components arranged in the antenna cavity 1 to drive the plane mirror 2 to rotate need to be made of non-magnetic materials, such as 304 aluminum, 6061 aluminum and copper.

[0045] In the art, considering that the plane mirrors in the antenna cavity 1 are generally two symmetrical groups of plane mirrors 2, a radial rotation axis 21 is provided between the two groups of plane mirrors 2, and polar rotation support seats 30 are provided at both ends of the radial rotation axis 21, and the two groups of plane mirrors 2 are arranged correspondingly on the polar rotation support seats 30 at both ends of the radial rotation axis 21, and then a traction member 40 is connected to the plane mirror 2 and the polar rotation support seat 30 respectively, so that the rotation of the plane mirror 2 in the radial direction and the polar direction is converted into the vertical up and down movement of the traction member 40. Specifically, through the up and down movement of the traction member 40, the plane mirror 2 is directly pulled to realize the polar upward rotation, or the polar rotation support seat 30 is pulled to realize the radial rotation of the plane mirror 2, which is simple and convenient; in addition, by providing multiple traction members 40, it is ensured that the rotation of the two groups of plane mirrors 2 does not affect each other.

[0046] Further, according to the present invention, in the present invention, the driving mechanism includes a driving source 50 and a vacuum welded bellows 60, the driving source 50 is arranged above the antenna cavity 1 for providing power; the vacuum welded bellows 60 is vertically extended and arranged above the antenna cavity 1, the upper end of the vacuum welded bellows 60 is assembled and fixed to the output end of the driving source 50 via a sealing copper ring 61 and a sealing blind flange 62, and the bottom end of the vacuum welded bellows 60 is assembled and fixed to the sealing blind flange 62 on the antenna cavity 1 via a sealing copper ring 61;

[0047] Through the above-mentioned installation structure, it can be ensured that the vacuum welding bellows 60 connected to the inside of the antenna cavity 1 meets the vacuum condition, wherein the upper end of the traction member 40 is fixed on the inner side of the upper end of the vacuum welding bellows 60, and driven by the driving source, the vacuum welding bellows 60 is driven to retract and retract and the traction member 40 is driven to rise or fall.

[0048] Further, in the present invention, the driving source 50 is a driving motor, a vertically extending support seat 70 is provided beside the vacuum welding bellows 60, a vertically extending optical axis 80 is provided beside the support seat 70, the upper end of the optical axis 80 is fixed to the upper end of the support seat 70 via an optical axis seat 81, and the bottom end of the optical axis 80 is fixed to the top of the antenna cavity 1 via the optical axis seat 81;

[0049] A threaded rod 71 is rotatably arranged on the support seat 70, and the threaded rod 71 is drivingly connected to the output shaft of the driving motor. Specifically, the driving motor is coaxially connected to the threaded rod 71 through a coupling. A connecting plate 90 is threadedly connected to the rod body of the threaded rod 71, one end of which is sleeved on the optical axis 80, and the other end is fixed to the upper end of the vacuum welding bellows 60.

[0050] In the present invention, the screw rod 71 connected to the driving motor is used to drive the vacuum welding bellows 60 to expand and contract in the axial direction, thereby driving the traction member 40 installed on the inner side of its upper end to move up and down. There is no special vacuum requirement for the screw rod 71 and the optical axis 80 used in conjunction with the screw rod 71. Considering the installation and subsequent maintenance of the screw rod optical axis assembly, it is assembled as a whole with the driving motor and installed on the top of the antenna cavity 1, specifically, it is installed on the back plate connecting plate of the antenna cavity 1.

[0051] In the present invention, combined with Figure 2 As shown, the upper end of the screw rod 71 is installed on the support seat 70 via a bearing cover plate 711 and a bearing 712 , and the lower end is installed on the top of the antenna cavity 1 via a bearing 712 and a supporting bottom plate 713 .

[0052] In the present invention, the screw rod 71 is fixed to the connecting plate 90 via a screw rod nut 714 , and the connecting plate 90 is sleeved on the optical axis 80 via an optical axis bushing 91 .

[0053] In the present invention, the center line of the screw rod 71 , the center line of the optical axis 80 , and the center line of the vacuum welding bellows 60 are parallel to each other and are on the same plane.

[0054] In the present invention, the upper end of the pulling member 40 passes through the protective cover 101 disposed on the top of the antenna cavity 1 and extends to be fixed to the inner side of the upper end of the vacuum welding bellows 60 .

[0055] According to the present invention, combined Figure 4 As shown, in the present invention, polar rotation support blocks 31 are respectively extended from both ends of the polar rotation support seat 30 to one side away from the radial rotation support seat 20, and both sides of the plane mirror 2 are respectively fixedly connected to the polar rotation member 201 by bolts, and then mounted on the polar rotation support blocks 31 at both ends of the polar rotation support seat 30 together with the first bearing assembly 202.

[0056] Furthermore, the bottom end of the traction member 40 is connected to the polar rotation support block 31 at one end of the polar rotation support seat 30 by bolts.

[0057] A limiting sleeve 11 is disposed on the support plate 10 , and a traction member 40 fixed on the polar rotation support block 31 and the plane mirror 2 passes through the limiting sleeve 11 and extends upward.

[0058] According to the present invention, combined Figure 5 As shown, a pressing plate 22 is sleeved on the shaft of the radial rotating shaft 21, and the pressing plate 22 is fixed to the radial rotating support seat 20 by bolts. Washer sleeves 23 are provided at both ends of the radial rotating shaft 21, and the polar rotating support seat 30 is fixed to the washer sleeves 23 via a second bearing assembly 32, and washers 24 are locked and fixed to both sides by bolts.

[0059] The above-mentioned installation structure effectively prevents the radial rotating shaft 21 from axially loosening in the shaft hole of the radial rotating support seat 20, thereby improving the stability of the equipment in use.

[0060] In the present invention, the optical mirror adjustment mechanism is also provided with a remote operation interface, so that its operation process can be operated by a remote control device. The optical mirror adjustment mechanism provided by the present invention generally belongs to a mechanical product in the application environment of the nuclear industry, has the functions of multi-directional adjustment and remote operation, and can also be used for multi-directional position adjustment of parts under vacuum isolation conditions in general industry.

[0061] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. An optical mirror adjustment mechanism suitable for use in ultra-high vacuum and strong magnetic field conditions, used for adjusting a plane mirror (2) disposed in an antenna cavity (1), characterized in that: The regulating mechanism comprises: A support plate (10), provided with two of them and arranged in parallel and spaced apart in the antenna cavity (1); A radial rotation support seat (20) is arranged at the lower ends of the two support plates (10), a radial rotation shaft (21) is rotatably connected to the radial rotation support seat (20), polar rotation support seats (30) are respectively arranged at both ends of the radial rotation shaft (21), and the plane mirror (2) is rotatably arranged on the polar rotation support seat (30); and, A traction member (40), the traction member (40) being arranged on the plane mirror (2) and the polar rotation support seat (30) located at both ends of the radial rotation axis (21), and the upper end of the traction member (40) extending upward out of the antenna cavity (1) and connected to a driving mechanism arranged above the antenna cavity (1), and driven by the driving mechanism to drive the plane mirror (2) to rotate in the polar direction around the hinge axis between the plane mirror (2) and the polar rotation support seat (30), or to drive the polar rotation support seat (30) to rotate the plane mirror (2) in the radial direction; Polar rotation support blocks (31) are respectively extended from both ends of the polar rotation support seat (30) to a side away from the radial rotation support seat (20); both sides of the plane mirror (2) are respectively fixedly connected to the polar rotation member (201) by bolts, and then mounted together with the first bearing assembly (202) on the polar rotation support blocks (31) at both ends of the polar rotation support seat (30); The bottom end of the traction member (40) is connected to a polar rotation support block (31) at one end of the polar rotation support seat (30) via bolts; The support plate (10) is provided with a limiting shaft sleeve (11), and the traction member (40) fixed on the polar rotation support block (31) and the plane mirror (2) passes through the limiting shaft sleeve (11) and extends upwards; A pressing plate (22) is sleeved on the shaft body of the radial rotating shaft (21), and the pressing plate (22) is fixed to the radial rotating support seat (20) by means of bolts; Washer sleeves (23) are provided at both ends of the radial rotating shaft (21); the polar rotating support seat (30) is fixed to the washer sleeve (23) via a second bearing assembly (32); and washers (24) are locked and fixed to both sides by bolts.

2. The optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions according to claim 1, characterized in that: The driving mechanism comprises: A driving source (50) is arranged above the antenna cavity (1) and is used to provide power; A vacuum welded bellows (60) is arranged vertically extending above the antenna cavity (1), the upper end of the vacuum welded bellows (60) being assembled and fixed to the output end of the driving source (50) via a sealing copper ring (61) and a sealing blind flange (62), and the bottom end of the vacuum welded bellows (60) being assembled and fixed to the sealing blind flange (62) on the antenna cavity (1) via a sealing copper ring (61); The upper end of the traction member (40) is fixed to the inner side of the upper end of the vacuum welding bellows (60), and driven by a driving source, the vacuum welding bellows (60) is driven to expand and contract and the traction member (40) is driven to rise or fall.

3. The optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions according to claim 2, characterized in that: The driving source (50) is a driving motor, a vertically extending support seat (70) is provided on the side of the vacuum welding bellows (60), a vertically extending optical axis (80) is provided on the side of the support seat (70), an upper end of the optical axis (80) is fixed to the upper end of the support seat (70) via an optical axis seat (81), and a bottom end of the optical axis (80) is fixed to the top of the antenna cavity (1) via the optical axis seat (81); A threaded rod (71) is rotatably arranged on the support seat (70), and the threaded rod (71) is drivingly connected to the output shaft of the drive motor; a connecting plate (90) is threadedly connected to the rod body of the threaded rod (71), one end of the connecting plate (90) is sleeved on the optical axis (80), and the other end is fixed to the upper end of the vacuum welding bellows (60).

4. The optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions according to claim 3, characterized in that: The upper end of the screw rod (71) is mounted on the support seat (70) via a bearing cover plate (711) and a bearing (712), and the lower end is mounted on the top of the antenna cavity (1) via a bearing (712) and a support bottom plate (713).

5. The optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions according to claim 3, characterized in that: The screw rod (71) is fixed to the connecting plate (90) via a screw rod nut (714), and the connecting plate (90) is sleeved on the optical axis (80) via an optical axis bushing (91).

6. The optical mirror adjustment mechanism suitable for ultra-high vacuum and strong magnetic field conditions according to claim 2, characterized in that: The upper end of the traction member (40) passes through a protective cover (101) arranged on the top of the antenna cavity (1) and extends to be fixed to the inner side of the upper end of the vacuum welding bellows (60).

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