A Rotating Mirror Driving Mechanism for a Thermonuclear Fusion Device

Abstract

The present invention relates to the technical field of plasma heating, and particularly to a rotating mirror drive mechanism for a thermonuclear fusion device, which includes a housing, a first mounting bracket, a rotating member, a cooling sleeve and a driving device; the housing has a fusion chamber, the first mounting bracket is arranged in the fusion chamber, and the first mounting bracket is connected with a pin shaft for driving the rotating mirror to rotate; the cooling sleeve is arranged in the fusion chamber, and the cooling sleeve has a first mounting hole and a first cooling flow channel; the first end of the rotating member is in transmission connection with the pin shaft, and the second end of the rotating member passes through the first mounting hole and extends outside the housing; the driving device is fixed outside the housing, and the output end of the driving device is connected with the second end of the rotating member to drive the rotating member to rotate. By introducing a coolant into the first cooling flow channel, the rotating member can be cooled, the temperature of the rotating shaft is reduced, so that the operating temperature of the driving device in contact with the rotating member is reduced, and the service life of the driving device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma heating, and particularly to a driving mechanism for a rotating mirror used in a thermonuclear fusion device. Background Art

[0002] Electromagnetic waves in the millimeter-wave band have relatively high energy. A millimeter-wave antenna can accurately transmit the millimeter-wave energy to the plasma region in a thermonuclear fusion device. In a thermonuclear fusion device, it is often necessary to concentrate the millimeter-wave energy in a specific direction and region. By controlling the phase and amplitude of each antenna element in the antenna array, the electromagnetic waves radiated by each element interfere and superimpose in space, thereby forming a beam with a specific shape and directivity, which can scan within a certain angle range and accurately direct the millimeter-wave energy to a specific position in the plasma for operations such as heating and diagnosis. A rotating mirror is a core component in the millimeter-wave antenna and is used to reflect the millimeter-wave to a specified position within a certain angle range and with a certain accuracy. Therefore, a driving mechanism is required to drive the rotating mirror to complete the rotation of the mirror surface.

[0003] The temperature inside the nuclear fusion device is extremely high. A part of the drive shaft for driving the rotation of the rotating mirror is arranged inside the fusion cavity of the fusion device, and the other part extends outside the fusion cavity and is connected to the motor. The temperature of the rotating shaft is extremely high, and the requirements for the operating temperature of the motor are also relatively high. The high operating temperature places high demands on the motor and affects the service life of the motor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that in the existing driving mechanism for a rotating mirror used in a thermonuclear fusion device, the temperature of the rotating shaft is extremely high, which places high demands on the motor for driving the rotating shaft and affects the service life of the motor.

[0005] To solve the above technical problem, the object of the present invention is to provide a driving mechanism for a rotating mirror used in a thermonuclear fusion device, including:

[0006] A housing, a first mounting bracket, a rotating member, a cooling sleeve, and a driving device;

[0007] The housing has a fusion cavity, the first mounting bracket is arranged in the fusion cavity, and the first mounting bracket is connected with a pin shaft for driving the rotation of the rotating mirror;

[0008] The cooling sleeve is arranged in the fusion cavity, and the cooling sleeve has a first mounting hole and a first cooling channel;

[0009] The first end of the rotating member is in transmission connection with the pin shaft, and the second end of the rotating member passes through the first mounting hole and extends outside the housing;

[0010] The driving device is fixed outside the housing, and the output end of the driving device is connected to the second end of the rotating member to drive the rotating member to rotate.

[0011] As a preferred solution, the rotating mirror includes a mirror body and a cooling plate fixedly attached to the back of the mirror body, and a second cooling flow channel is provided in the cooling plate.

[0012] As a preferred solution, the rotating mirror driving mechanism for the thermonuclear fusion device includes a connecting pipe that communicates the first cooling flow channel and the second cooling flow channel.

[0013] As a preferred solution, the first cooling flow channel includes a first sub-flow channel and a second sub-flow channel that are isolated from each other;

[0014] The connecting pipe includes a first pipe body and a second pipe body. One end of the first pipe body communicates with the first sub-flow channel and the other end communicates with the second cooling flow channel. One end of the second pipe body communicates with the second cooling flow channel and the other end communicates with the second sub-flow channel.

[0015] As a preferred solution, the rotating mirror driving mechanism for the thermonuclear fusion device further includes a third pipe body and a fourth pipe body. One end of the third pipe body communicates with the first sub-flow channel and the other end extends outside the housing; one end of the fourth pipe body communicates with the second sub-flow channel and the other end extends outside the housing.

[0016] As a preferred solution, the first mounting bracket is detachably connected with an encoder for measuring the rotation angle of the pin shaft.

[0017] As a preferred solution, a worm gear is rotatably connected to the first mounting bracket. The pin shaft is fixed to the worm gear, and the worm gear meshes with a worm. The first end of the rotating member is drivingly connected to the worm.

[0018] As a preferred solution, the rotating member and the worm are arranged at an angle, and the first end of the rotating member is connected to the worm through a cross-axis transmission mechanism.

[0019] As a preferred solution, the outer side wall of the rotating member and the inner side wall of the first mounting hole are arranged at intervals;

[0020] The rotating mirror driving mechanism for the thermonuclear fusion device includes at least two bearings. Each of the bearings is arranged at intervals along the axial direction of the cooling sleeve. The outer rings of each of the bearings are fixed to the cooling sleeve, and the first end of the rotating member is fixedly inserted into the inner holes of each of the bearings.

[0021] As a preferred solution, the rotating member includes a rotating rod and an eccentric rod; the rotating rod is rotatably inserted into the first mounting hole. The first end of the rotating rod is drivingly connected to the pin shaft, and the second end of the rotating rod is hinged to the eccentric rod;

[0022] The rotating mirror driving mechanism for the thermonuclear fusion device further comprises a sealing tube and a fixing sleeve, wherein the sealing tube sleeve is arranged on the outer side of the eccentric rod, and the first end of the sealing tube is sealed and fixed to the end of the cooling sleeve away from the first mounting frame, and the second end of the sealing tube is sealed and fixed to the outer peripheral side of the eccentric rod;

[0023] The shell has a second mounting hole, the fixing sleeve is fixedly inserted into the second mounting hole, the fixing sleeve has a receiving cavity, the sealing tube and the eccentric rod are both arranged in the receiving cavity, the driving device is fixed to one end of the sealing sleeve located outside the fusion chamber, one end of the eccentric rod away from the rotating rod is fixedly connected to the output shaft of the driving device, and the end of the eccentric rod away from the rotating rod is eccentrically arranged with the output shaft of the driving device.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention discloses a rotating mirror driving mechanism for a thermonuclear fusion device, comprising a shell, a first mounting frame, a rotating member, a cooling jacket and a driving device; the shell has a fusion chamber, the first mounting frame is arranged in the fusion chamber, and the first mounting frame is connected with a pin shaft for driving the rotating mirror to rotate; the cooling jacket is arranged in the fusion chamber, and the cooling jacket has a first mounting hole and a first cooling channel; the first end of the rotating member is drivingly connected to the pin shaft, and the second end of the rotating member passes through the first mounting hole and extends out of the shell; the driving device is fixed outside the shell, and the output end of the driving device is connected to the second end of the rotating member to drive the rotating member to rotate, and the rotating member can be cooled by introducing a coolant into the first cooling channel, thereby reducing the temperature of the rotating shaft, thereby reducing the use temperature of the driving device in contact with the rotating member, and improving the service life of the driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure in which the rotating mirror driving mechanism for the thermonuclear fusion device of the present invention is installed in a housing;

[0027] Figure 2 It is an axonometric diagram of the rotating mirror driving mechanism for the thermonuclear fusion device of the present invention;

[0028] Figure 3 is a first schematic diagram of the mounting structure of the rotating mirror;

[0029] Figure 4 is a second schematic diagram of the mounting structure of the rotating mirror;

[0030] Figure 5 is a top view of the thermonuclear fusion device of the present invention;

[0031] Figure 6 forFigure 5 Cross-sectional view taken along line A-A in [the figure];

[0032] Figure 7 Top view of the cooling jacket;

[0033] Figure 8 is Figure 7 Cross-sectional view taken along line B-B in [the figure];

[0034] Figure 9 is Figure 7 Cross-sectional view taken along line C-C in [the figure];

[0035] Figure 10 is Figure 9 Partial enlarged view at position D in [the figure];

[0036] Figure 11 is Figure 9 Partial enlarged view at position E in [the figure];

[0037] In the figure, 100 is the fusion chamber, 1 is the housing, 21 is the first mounting bracket, 22 is the second mounting bracket, 3 is the rotating member, 31 is the rotating rod, 32 is the eccentric rod, 321 is the first rod-shaped portion, 322 is the second rod-shaped portion, 4 is the cooling jacket, 41 is the first mounting hole, 42 is the first cooling channel, 421 is the first sub-channel, 422 is the second sub-channel, 43 is the inner sleeve, 44 is the outer sleeve, 441 is the process hole, 45 is the first plugging disc, 451 is the first annular protrusion, 452 is the second annular protrusion, 453 is the first outer weld, 454 is the second outer weld, 46 is the second plugging disc, 461 is the third annular protrusion, 464 is the annular depression, 465 is the third outer weld, 466 is the inner weld, 47 is the first partition strip, 48 is the second partition strip, 5 is the driving device, 6 is the rotating mirror, 61 is the mirror body, 62 is the cooling plate, 71 is the first pipe body, 72 is the second pipe body, 73 is the third pipe body, 74 is the fourth pipe body, 81 is the encoder, 82 is the worm and gear transmission mechanism, 821 is the worm gear, 822 is the worm, 83 is the cross-axis transmission mechanism, 84 is the bearing, 91 is the sealing pipe, 92 is the fixing sleeve, 93 is the reducer. Detailed implementation manners

[0038] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as "second" information, and similarly, the "second" information may also be referred to as "first" information.

[0040] As Figures 1 to 11 shown, a preferred embodiment of the rotating mirror drive mechanism for a thermonuclear fusion device of the present invention includes: a housing 1, a first mounting bracket 21, a rotating member 3, a cooling sleeve 4, and a driving device 5; the housing 1 has a fusion chamber 100, the first mounting bracket 21 is disposed in the fusion chamber 100, and the first mounting bracket 21 can be fixed to the inner wall of the fusion chamber 100 by means of welding or bolt connection, etc. The first mounting bracket 21 is connected with a pin shaft for driving the rotating mirror 6 to rotate, and the pin shaft can be connected to the first mounting bracket 21 through a rotating bearing; the cooling sleeve 4 is disposed in the fusion chamber 100, and the cooling sleeve 4 can be fixed in the fusion chamber 100 through a second mounting bracket 22, and the second mounting bracket 22 is fixed to the inner wall of the fusion chamber 100 by means of welding or bolt connection. The cooling sleeve 4 has a first mounting hole 41 and a first cooling channel 42, and the first cooling channel 42 is arranged at an interval from the first mounting hole 41; the first end of the rotating member 3 is in transmission connection with the pin shaft, and the second end of the rotating member 3 passes through the first mounting hole 41 and extends outside the housing 1; the driving device 5 is fixed outside the housing 1, and the output end of the driving device 5 is connected to the second end of the rotating member 3 to drive the rotating member 3 to rotate. By providing the cooling sleeve 4, the rotating member 3 is cooled, the heat transferred from the rotating member 3 to the driving device 5 is reduced, thereby reducing the temperature requirement for the use of the driving device 5, increasing the service life of the driving device 5, reducing the equipment cost, and at the same time improving the stability and reliability of the nuclear fusion device.

[0041] It should be noted that the thermonuclear fusion device itself has a complex electromagnetic environment. The driving device 5 usually uses an electric motor, and the electric motor will generate electromagnetic signals. Therefore, it is necessary to keep the driving device 5 at a sufficient distance from the rotating mirror 6. In this embodiment, the distance between the driving device 5 and the rotating mirror 6 is greater than two meters. Setting the driving device 5 at a position at least two meters away can keep it at a certain distance from the magnetic field generated by the thermonuclear fusion device, reduce the signal influence of the magnetic field of the fusion device on the driving device 5, improve the rotation accuracy of the driving device 5, and improve the measurement accuracy and control accuracy. In addition, a part of the rotating member 3 must be located in the fusion chamber 100. In this embodiment, the length of the housing 1 in the length direction of the rotating member 3 is relatively long. The length of the rotating member 3 located in the fusion chamber 100 is greater than the length located outside the fusion chamber 100, and the length of the cooling sleeve 4 is also relatively long. Inside the fusion chamber 100, the temperature of the rotating member 3 gradually decreases as the distance from the rotating mirror 6 increases. Setting the cooling sleeve 4 in the fusion chamber 100 and making the length of the cooling sleeve 4 relatively long can reduce the temperature drop gradient along the length direction of the rotating member 3, so that the temperature difference between the rotating member 3 located inside the fusion chamber 100 and close to the driving device 5 and the rotating member 3 located outside the housing 1 and close to the housing 1 is small; avoiding stress deformation of the rotating member 3 due to the large temperature difference inside and outside the fusion chamber 100; thus making the adjustment accuracy of the rotating mirror driving mechanism for the thermonuclear fusion device in this embodiment higher.

[0042] In a nuclear fusion device, in order to make the nuclear fusion reaction reach the required high-temperature conditions, it is necessary for the millimeter-wave antenna to transmit high-power millimeter-wave energy to the plasma. The millimeter-wave gyrotron used by the rotating mirror 6 can generate megawatt-level power. A large amount of energy is transmitted through the rotating mirror 6, which will cause the temperature of the rotating mirror 6 to be extremely high, and the heat of the rotating mirror 6 will be conducted to the rotating member 3 through the pin shaft and the transmission mechanism. In this embodiment, the rotating mirror 6 includes a mirror body 61 and a cooling plate 62 fixedly attached to the back of the mirror body 61. A second cooling flow channel is provided in the cooling plate 62. The cooling plate 62 can cool the rotating mirror 6, reduce the heat conducted from the rotating mirror 6 to the rotating member 3, and further reduce the temperature of the rotating member 3.

[0043] Among them, due to the extremely high temperature of the rotating mirror 6, it is impossible to use a coolant with a relatively low temperature for cooling the rotating mirror 6, because using a coolant with a relatively low temperature will cause a large temperature difference between the back and the front of the rotating mirror 6, and it is easy to cause deformation of the rotating mirror 6 due to the temperature difference. In this embodiment, the rotating mirror driving mechanism for the thermonuclear fusion device includes a connecting pipe, and the connecting pipe communicates with the first cooling flow channel 42 and the second cooling flow channel. The coolant flowing out of the first cooling flow channel 42 rises in temperature after absorbing the heat of the rotating member 3, so that the temperature difference between the coolant flowing into the second cooling flow channel and the temperature of the rotating mirror 6 itself is within a reasonable range, realizing both the cooling of the rotating mirror 6 and preventing the rotating mirror 6 from deforming.

[0044] In this embodiment, the first cooling channel 42 includes a first sub-channel 421 and a second sub-channel 422 that are isolated from each other; the connecting pipe includes a first pipe body 71 and a second pipe body 72. One end of the first pipe body 71 communicates with the first sub-channel 421, and the other end communicates with the second cooling channel. One end of the second pipe body 72 communicates with the second cooling channel, and the other end communicates with the second sub-channel 422. Specifically, the ends of the first pipe body 71 and the second pipe body 72 can be connected to the rotating mirror 6 or the cooling sleeve 4 by welding. The coolant first flows into the first sub-channel 421 to cool the rotating member 3, then flows into the second cooling channel through the first pipe body 71 to cool the rotating mirror 6, then flows out of the second cooling channel, and flows into the second sub-channel 422 through the second pipe body 72, and then flows out of the second sub-channel 422 to the outside of the housing 1.

[0045] To facilitate the circulation of the coolant, in this embodiment, the rotating mirror driving mechanism for the thermonuclear fusion device further includes a third pipe body 73 and a fourth pipe body 74. One end of the third pipe body 73 communicates with the first sub-channel 421, and the other end extends to the outside of the housing 1; one end of the fourth pipe body 74 communicates with the second sub-channel 422, and the other end extends to the outside of the housing 1. In this embodiment, a heat exchange device can be provided outside the housing 1 to cool the coolant flowing out of the fourth pipe body 74, and the coolant cooled by the heat exchange device then flows into the third pipe body 73 to realize the circulation of the coolant.

[0046] There are various ways to form the first sub-channel 421 and the second sub-channel 422 in the cooling sleeve 4, such as machining the first sub-channel 421 and the second sub-channel 422 by drilling or extrusion. In this embodiment, for example Figures 7 to 11As shown in the figure, the cooling jacket 4 includes an inner sleeve 43, an outer sleeve 44, a first sealing disc 45, a second sealing disc 46, a first partition strip 47 and a second partition strip 48; the inner sleeve 43 is coaxially inserted into the outer sleeve 44, and the outer side wall of the inner sleeve 43 is arranged at intervals with the inner side wall of the outer sleeve 44. The interval between the outer side wall of the inner sleeve 43 and the inner side wall of the outer sleeve 44 forms a first cooling channel 42. The first partition strip 47 and the second partition strip 48 are both fixedly inserted into the first cooling channel 42, and the first partition strip 47 and the second partition strip 48 are arranged at uniform intervals around the axis of the inner sleeve 43 and the outer sleeve 44. The first partition strip 47 and the second partition strip 48 divide the first cooling channel 42 into a first sub-channel 421 and a second sub-channel 422; the first sealing disc 45 is fixed to the first end of the inner sleeve 43 and the first end of the outer sleeve 44. The first end of the inner sleeve 43 is the end of the inner sleeve 43 close to the rotating mirror 6, and the first end of the outer sleeve 44 is the end of the outer sleeve 44 close to the rotating mirror 6; the second sealing disc 46 is fixed to the second end of the inner sleeve 43 and the second end of the outer sleeve 44, so that the first sub-channel 421 and the second sub-channel 422 form a closed space. To facilitate the processing of the cooling jacket 4, in this embodiment, the end of the first sealing disc 45 facing the inner sleeve 43 and the outer sleeve 44 is provided with a first annular convex portion 451 protruding towards the inner sleeve 43 and a second annular convex portion 452 protruding towards the outer sleeve 44; the first annular convex portion 451 and the first end of the inner sleeve 43 are welded by a first outer weld 453, and the second annular convex portion 452 and the first end of the outer sleeve 44 are butt-welded by a second outer weld 454. At the position of the second sealing disc 46 opposite to the second end of the outer sleeve 44, there is a third annular convex portion 461. The third annular convex portion 461 and the second end of the outer sleeve 44 are butt-welded by a third outer weld 465. At the position of the second sealing disc 46 opposite to the second end of the inner sleeve 43, there is an annular recess 464. The second end of the inner sleeve 43 is inserted into the annular recess 464 and is butt-welded to the end wall of the annular recess 464 by an inner weld 466. When assembling the cooling jacket 4, first butt-weld the first end of the inner sleeve 43 with the first annular convex portion 451, and butt-weld the second end of the outer sleeve 44 with the third annular convex portion 461. Then weld the first partition strip 47 and the second partition strip 48 to the outer side wall of the inner sleeve 43. Then insert the inner sleeve 43 welded with the first partition strip 47 and the second partition strip 48 into the outer sleeve 44, and butt-weld the first end of the outer sleeve 44 with the second annular convex portion 452, and butt-weld the second end of the inner sleeve 43 with the end wall of the annular recess 464. This structure of the cooling jacket 4 can make the volumes of the first sub-channel 421 and the second sub-channel 422 larger, ensuring the cooling effect.

[0047] Further, to ensure the firm fixation of the first partition strip 47 and the second partition strip 48, in this embodiment, a plurality of process holes 441 are provided at positions on the tube wall of the outer sleeve 44 opposite to the first partition strip 47 and the second partition strip 48, and the process holes 441 are arranged at intervals along the axial direction of the outer sleeve 44. After the inner sleeve 43, the outer sleeve 44, the first sealing disc 45, and the second sealing disc 46 are welded, one end of the first partition strip 47 facing away from the inner sleeve 43 is welded to the outer sleeve 44 through the process holes 441, and one end of the second partition strip facing away from the inner sleeve 43 is welded to the outer sleeve 44, and the process holes 441 are blocked while welding.

[0048] Among them, the second end of the outer sleeve 44 is provided with a liquid inlet communicating with the first sub-channel 421, and is also provided with a liquid outlet communicating with the second sub-channel 422. The third pipe body 73 is connected to the liquid inlet, the fourth pipe body 74 is connected to the liquid outlet, and the first pipe body 71 and the second pipe body 72 are connected at a position close to the second end of the outer sleeve 44.

[0049] In this embodiment, the outer side wall of the rotating member 3 and the inner side wall of the first mounting hole 41 are arranged at intervals; the rotating mirror driving mechanism for the thermonuclear fusion device includes at least two bearings 84, and the bearings 84 are arranged at intervals along the axial direction of the cooling sleeve 4. The outer rings of the bearings 84 are fixed to the cooling sleeve 4, and the first end of the rotating member 3 is fixedly inserted into the inner holes of the bearings 84. The arrangement of the bearings 84 ensures the smooth rotation of the rotating member 3, and the inner wall of the cooling sleeve 4 and the outer side of the rotating member 3 are arranged at intervals, avoiding the relatively cold coolant from contacting the relatively hot rotating member 3, and thus avoiding the deformation of the rotating member 3 due to the sudden cooling of the coolant when contacting the cooling sleeve. In this embodiment, there are two bearings 84, and the outer rings of the two bearings 84 are respectively fixed at both ends of the cooling sleeve 4. The two bearings 84 are coaxially arranged, and the rotating member 3 is fixedly inserted into the inner holes of the two bearings 84.

[0050] After the rotating mirror 6 and the rotating mirror driving mechanism are arranged in the fusion device, the driving device 5 drives the rotating member 3 to rotate, so as to adjust the angle of the rotating mirror 6. In order to facilitate the operator to quickly adjust the rotating mirror 6 to the right position, in this embodiment, the driving device 5 is a stepping motor, and the stepping motor is equipped with a built-in encoder capable of measuring the angle between the actual position of the motor shaft and the zero position of the motor shaft, and the first mounting frame 21 is detachably connected with an encoder 81 for measuring the rotation angle of the pin shaft. Specifically, before the rotating mirror 6 and the rotating mirror driving mechanism are arranged in the fusion device, the encoder 81 is connected to the first mounting frame 21, the rotating mirror 6 is adjusted to the initial position, and the shaft of the stepping motor is adjusted to the zero position, and the motor shaft is connected to the rotating member 3 by a coupling. Thereafter, the stepping motor is started, and the corresponding relationship between the angle of the motor shaft and the test value of the encoder 81 is recorded, so as to form a corresponding relationship record table between the encoder 81 value and the angle of the motor shaft, and the record table can cover the working range of the rotating mirror 6. After the record sheet is completed, the encoder 81 is removed, and then the rotating mirror 6 and the rotating mirror driving mechanism are set in the fusion device to prevent the high temperature inside the fusion device from damaging the encoder 81. That is, the encoder 81 is used in the debugging and installation stage, and the encoder 81 will not be used during the actual operation. When the operator needs to adjust the angle of the rotating mirror 6, the adjustment is made according to the record sheet. In this embodiment, pins are connected on both sides of the rotating mirror 6, and the two pins are respectively connected to the two sides of the first mounting frame 21. The encoder 81 is on one of the pins, and the first end of the rotating member 3 is transmission-connected to the other pin.

[0051] In this embodiment, a worm wheel 821 is rotatably connected to the first mounting frame 21, a pin is fixed to the worm wheel 821, a worm 822 is meshed with the worm wheel 821, a first end of the rotating member 3 is transmission-connected to the worm 822, and the worm wheel 821 and the worm 822 form a worm gear transmission mechanism 82. The worm gear transmission mechanism 82 has high adjustment accuracy and a self-locking function, thereby ensuring the adjustment accuracy of the rotating mirror 6 and the stable position of the rotating mirror 6 after adjustment. Specifically, the worm wheel 821 is a fan-shaped worm wheel, which is rotatably arranged on the first mounting frame 21, and the center of the fan-shaped worm wheel is fixed to the pin.

[0052] In this embodiment, the rotating member 3 and the worm 822 are arranged at an angle, and the first end of the rotating member 3 is connected to the worm 822 via a cross-axis transmission mechanism 83. The arrangement of the cross-axis transmission mechanism 83 makes the arrangement of the rotating member 3 in the housing 1 of the present invention more flexible, avoiding interference between the rotating member 3 and other components in the housing 1, thereby allowing more components to be arranged in the housing 1, making the structure of the thermonuclear fusion device using the rotating mirror driving mechanism for the thermonuclear fusion device of the present invention more compact. Specifically, the cross-axis transmission mechanism 83 is a cross-axis universal joint.

[0053] In this embodiment, the rotating member 3 includes a rotating rod 31 and an eccentric rod 32; the rotating rod 31 is rotatably inserted into the first mounting hole 41, the first end of the rotating rod 31 is connected to the pin, and the second end of the rotating rod 31 is hinged to the eccentric rod 32. The rotating mirror driving mechanism for the thermonuclear fusion device of this embodiment also includes a sealing tube 91 and a fixing sleeve 92, the sealing tube 91 is sleeved on the outside of the eccentric rod 32, and the first end of the sealing tube 91 is sealed and fixed to the end of the cooling sleeve 4 away from the first mounting frame 21, and the second end of the sealing tube 91 is sealed and fixed to the outer peripheral side of the eccentric rod 32; the housing 1 has a second mounting hole, the fixing sleeve 92 is fixedly inserted into the second mounting hole, the fixing sleeve 92 has an accommodating cavity, the sealing tube 91 and the eccentric rod 32 are both arranged in the accommodating cavity, the driving device 5 is fixed to the end of the sealing sleeve located outside the fusion chamber 100, the end of the eccentric rod 32 away from the rotating rod 31 is fixedly connected to the output shaft of the driving device 5, and the end of the eccentric rod 32 away from the rotating rod 31 is eccentrically arranged with the output shaft of the driving device 5. To ensure the adjustment accuracy, in this embodiment, the output shaft of the driving device 5 is connected to a reducer 93 , and the second end of the eccentric rod 32 is connected to the output shaft of the reducer 93 .

[0054] Specifically, the sealing tube 91 is a high-temperature resistant flexible tube, and the eccentric rod 32 includes a first rod-shaped portion 321 and a second rod-shaped portion 322. The first rod-shaped portion 321 and the second rod-shaped portion 322 are arranged at an angle, and the angle between the first rod-shaped portion 321 and the second rod-shaped portion 322 is an acute angle. The first end of the first rod-shaped portion 321 is hinged to the rotating rod 31, and the second end of the first rod-shaped portion 321 is fixedly connected to the second rod-shaped portion 322. The second rod-shaped portion 322 is vertically fixed to the output shaft of the driving device 5, and the end of the sealing tube 91 facing away from the cooling jacket 4 is sealed and fixed on the outside of the first rod-shaped portion 321. The output shaft of the driving device 5 rotates, driving the second rod-shaped portion 322 to rotate. The second rod-shaped portion 322 drives the first rod-shaped portion 321 to rotate while causing the first rod-shaped portion 321 to swing in the accommodating cavity. During the rotation and swinging of the first rod-shaped portion 321, the first end of the sealing tube 91 will not rotate relative to the end of the cooling jacket 4, and the second end of the sealing tube 91 will not rotate relative to the second rod-shaped portion 322. The sealing tube 91 adapts to the position change of the second rod-shaped portion 322 by torsional deformation. The first end of the first rod-shaped portion 321 is provided with a mounting groove, and the end of the rotating rod 31 is inserted in the mounting groove, and a pin body is penetrated in the groove wall of the mounting groove, and the pin body is perpendicular to the groove wall of the mounting groove and penetrated in the rotating rod 31.

[0055] The temperature and vacuum degree inside the thermonuclear fusion device are relatively high. If the eccentric rod 32 is not provided and the rotating rod 31 is passed through the side wall of the housing 1 and connected to the driving device 5, since the rotating rod 31 needs to rotate, it is difficult for the rotating connection node between the rotating rod 31 and the housing 1 to meet the sealing requirements of the fusion cavity 100. In this embodiment, one end of the sealing pipe 91 is hermetically fixed to the end of the cooling sleeve 4, and the rotating connection node between the rotating rod 31 and the cooling sleeve 4 is in the same air pressure state as the lumen of the sealing pipe 91. The second end of the sealing pipe 91 is hermetically fixed to the side wall of the eccentric rod 32. When the eccentric rod 32 rotates and swings, there will be no rotation between the second end of the sealing pipe 91 and the eccentric rod 32, so that a flange structure can be used for fixed connection between the second end of the sealing pipe 91 and the second rod-shaped portion 322, ensuring the sealing performance of the connection node between the second end of the sealing pipe 91 and the eccentric rod 32.

[0056] In summary, for the rotating mirror driving mechanism of the thermonuclear fusion device of the present invention, by introducing a coolant into the first cooling channel 42, the rotating member 3 can be cooled, the temperature of the rotating shaft is reduced, so that the operating temperature of the driving device 5 in contact with the rotating member 3 is reduced, and the service life of the driving device 5 is increased. Moreover, the angle scanning accuracy of the rotating mirror 6 is high, and it is suitable for use in radiation, high temperature, and vacuum environments. The accuracy test of the rotation angle of the rotating mirror 6 of the present invention is carried out, and within the large rotation range of 16°, the angle rotation accuracy meets ≤0.25°.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A rotating mirror driving mechanism for a thermonuclear fusion device, characterized in that: include: A housing (1), a first mounting frame (21), a rotating member (3), a cooling jacket (4), and a driving device (5); The housing (1) has a fusion chamber (100), the first mounting frame (21) is arranged in the fusion chamber (100), and the first mounting frame (21) is connected to a pin shaft for driving a rotating mirror (6) to rotate; The cooling jacket (4) is fixed in the fusion chamber (100) via a second mounting frame (22), and the cooling jacket (4) has a first mounting hole (41) and a first cooling channel (42); the cooling jacket (4) comprises an outer sleeve (44) and an inner sleeve (43) coaxially inserted into the outer sleeve (44), the interval between the outer wall of the inner sleeve (43) and the inner wall of the outer sleeve (44) forming a first cooling channel (42), and a first spacer bar (47) and a second spacer bar (48) are fixedly inserted into the first cooling channel (42) to separate the first cooling channel (42) into a first sub-channel (421) and a second sub-channel (422); The outer wall of the rotating member (3) is spaced apart from the inner wall of the first mounting hole (41); the rotating mirror driving mechanism for the thermonuclear fusion device comprises at least two bearings (84), each of the bearings (84) is spaced apart along the axial direction of the cooling jacket (4), the outer ring of each of the bearings (84) is fixed to the cooling jacket (4), and the first end of the rotating member (3) is fixedly inserted into the inner hole of each of the bearings (84); The first end of the rotating member (3) is drivingly connected to the pin shaft, and the second end of the rotating member (3) passes through the first mounting hole (41) and extends out of the housing (1); The driving device (5) is fixed outside the housing (1), and an output end of the driving device (5) is connected to the second end of the rotating member (3) to drive the rotating member (3) to rotate.

2. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 1, characterized in that: The rotating mirror (6) comprises a mirror body (61) and a cooling plate (62) fixedly attached to the back of the mirror body (61), wherein a second cooling channel is provided in the cooling plate (62).

3. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 2, characterized in that: The rotating mirror driving mechanism for the thermonuclear fusion device comprises a connecting pipe, wherein the connecting pipe connects the first cooling flow channel (42) and the second cooling flow channel.

4. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 3, characterized in that: The first cooling flow channel (42) comprises a first sub-flow channel (421) and a second sub-flow channel (422) which are isolated from each other; The connecting pipe comprises a first pipe body (71) and a second pipe body (72); one end of the first pipe body (71) is connected to the first sub-channel (421) and the other end is connected to the second cooling channel; one end of the second pipe body (72) is connected to the second cooling channel and the other end is connected to the second sub-channel (422).

5. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 4, characterized in that: The rotating mirror driving mechanism for the thermonuclear fusion device further comprises a third tube body (73) and a fourth tube body (74); one end of the third tube body (73) is connected to the first sub-flow channel (421), and the other end extends out of the shell (1); one end of the fourth tube body (74) is connected to the second sub-flow channel (422), and the other end extends out of the shell (1).

6. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 1, characterized in that: The first mounting frame (21) is detachably connected to an encoder (81) for measuring the rotation angle of the pin shaft.

7. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 1, characterized in that: A worm wheel (821) is rotatably connected to the first mounting frame (21), the pin shaft is fixed to the worm wheel (821), a worm (822) is meshed with the worm wheel (821), and the first end of the rotating member (3) is transmission-connected to the worm (822).

8. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 7, characterized in that: The rotating member (3) and the worm (822) are arranged at an angle, and the first end of the rotating member (3) is connected to the worm (822) via a cross-axis transmission mechanism (83).

9. The rotating mirror driving mechanism for a thermonuclear fusion device according to claim 1, characterized in that: The rotating member (3) comprises a rotating rod (31) and an eccentric rod (32); the rotating rod (31) is rotatably inserted into the first mounting hole (41), the first end of the rotating rod (31) is drivingly connected to the pin shaft, and the second end of the rotating rod (31) is hingedly connected to the eccentric rod (32); The rotating mirror driving mechanism for the thermonuclear fusion device further comprises a sealing tube (91) and a fixing sleeve (92), wherein the sealing tube (91) is sleeved on the outside of the eccentric rod (32), and a first end of the sealing tube (91) is sealed and fixed to an end of the cooling sleeve (4) away from the first mounting frame (21), and a second end of the sealing tube (91) is sealed and fixed to the outer peripheral side of the eccentric rod (32); The housing (1) has a second mounting hole, the fixing sleeve (92) is fixedly inserted into the second mounting hole, the fixing sleeve (92) has a receiving cavity, the sealing tube (91) and the eccentric rod (32) are both arranged in the receiving cavity, the driving device (5) is fixed to one end of the sealing sleeve located outside the fusion chamber (100), one end of the eccentric rod (32) facing away from the rotating rod (31) is fixedly connected to the output shaft of the driving device (5), and one end of the eccentric rod (32) facing away from the rotating rod (31) is eccentrically arranged with respect to the output shaft of the driving device (5).

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