Fatigue test system for driving mechanism of rotating mirror

Abstract

The utility model relates to the technical field of rotating mirrors for thermonuclear fusion devices, and discloses a fatigue test system for a rotating mirror driving mechanism, which is used for the fatigue test of the rotating mirror driving mechanism for the thermonuclear fusion device, the rotating mirror driving mechanism comprises a driving motor and a transmission assembly, and the driving motor can drive the rotating mirror to rotate through the transmission assembly. The rotating mirror driving mechanism fatigue test system comprises a laser tracker, a target ball and an encoder. The target ball is arranged on the rotating mirror. The laser tracker is used for cooperating with the target ball to monitor the position of the rotating mirror. The encoder is arranged on the driving motor and used for detecting the angular displacement of a rotating shaft of the driving motor. The fatigue test system of the rotating mirror driving mechanism can accurately judge the driving precision of the rotating mirror driving mechanism to the rotating mirror, and meets the requirement of fatigue test of the rotating mirror driving mechanism.

Description

Technical Field

[0001] This utility model relates to the field of rotating mirror technology for thermonuclear fusion devices, and in particular to a fatigue testing system for a rotating mirror drive mechanism. Background Technology

[0002] Millimeter-wave electromagnetic waves possess high energy. Millimeter-wave antennas can precisely transmit this energy to the plasma region within a thermonuclear fusion device. In thermonuclear fusion devices, millimeter-wave energy often needs to be concentrated in a specific direction and area. 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, forming a beam with a specific shape and directionality. This beam can scan within a certain angular range, precisely directing the millimeter-wave energy to a specific location within the plasma for applications such as heating and diagnostics. The rotating mirror is a core component of the millimeter-wave antenna, used to reflect millimeter waves to a designated location with a specific angular range and precision. Therefore, a drive mechanism is needed to rotate the mirror.

[0003] The internal temperature of a thermonuclear fusion device is extremely high. One end of the drive mechanism that drives the rotating mirror extends into the fusion chamber of the fusion device to drive the rotating mirror, while the other end extends out of the fusion chamber and connects to the drive motor. Because the fusion chamber is a vacuum environment, the outer shell of the drive mechanism is sealed to the thermonuclear fusion device, and a sealed cavity is provided within the drive structure to prevent the fusion chamber from communicating with the outside world through the drive mechanism, which would cause the fusion chamber to lose its vacuum environment.

[0004] In the past, conventional drive mechanism development has been less demanding than the environment of a fusion reactor, and maintenance is more convenient. Therefore, the requirements for fatigue life cycles and angular accuracy are far less stringent than those for the rotating mirror drive mechanism of a thermonuclear fusion device. Furthermore, conventional drive mechanisms do not require consideration of vacuum sealing. As a result, existing fatigue testing systems for drive mechanisms cannot meet the fatigue testing requirements of rotating mirror drive mechanisms for thermonuclear fusion devices.

[0005] Therefore, there is an urgent need for a fatigue testing system for rotating mirror drive mechanisms to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a fatigue testing system for a rotating mirror drive mechanism, which can accurately determine the driving accuracy of the rotating mirror drive mechanism on the rotating mirror and meet the needs of fatigue testing of the rotating mirror drive mechanism.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A fatigue testing system for a rotating mirror drive mechanism is provided for fatigue testing of a rotating mirror drive mechanism used in a thermonuclear fusion device. The rotating mirror drive mechanism includes a drive motor and a transmission assembly. The drive motor can drive the rotating mirror to rotate through the transmission assembly. The fatigue testing system for the rotating mirror drive mechanism includes a laser tracker, a target ball, and an encoder.

[0009] The target ball is mounted on the rotating mirror;

[0010] The laser tracker is used in conjunction with the target ball to monitor the position of the rotating mirror;

[0011] The encoder is mounted on the drive motor and is used to detect the angular displacement of the drive motor shaft.

[0012] As an improvement to the above technical solution, multiple target balls are provided, and the multiple target balls are spaced apart on the rotating mirror.

[0013] As an improvement to the above technical solution, the rotating mirror is quadrilateral, and a target ball is provided in each of the four apex regions of the rotating mirror.

[0014] As an improvement to the above technical solution, the rotating mirror driving mechanism further includes a housing, the housing having a sealed cavity, the transmission component being located within the sealed cavity, and both ends of the transmission component in the length direction being exposed outside the housing, and a suction connector being provided on the housing, the suction connector connecting the sealed cavity to the outside of the housing;

[0015] The fatigue testing system for the rotating mirror drive mechanism also includes a leak detector, which is used to connect with the suction connector to detect the sealing cavity.

[0016] As an improvement to the above technical solution, a first cooling channel is provided inside the housing;

[0017] The rotating mirror includes a mirror body and a cooling plate fixedly attached to the back of the mirror body. The cooling plate is provided with a second cooling channel, and the target balls are all disposed on the mirror body.

[0018] The rotating mirror driving mechanism further includes a connecting pipe, a coolant supply pipe, and a coolant return pipe. The connecting pipe connects the housing and the cooling plate. A connecting channel is provided inside the connecting pipe, which connects the first cooling channel and the second cooling channel. One end of both the coolant supply pipe and the coolant return pipe is connected to the housing. A supply channel is provided inside the coolant supply pipe, and a return channel is provided inside the coolant return pipe.

[0019] The first cooling channel, the second cooling channel, the connecting channel, the liquid supply channel, and the liquid return channel form a cooling channel group.

[0020] As an improvement to the above technical solution, the leak detector is also used to connect to the coolant supply pipe or coolant return pipe to detect the cooling channel assembly.

[0021] As an improvement to the above technical solution, a coolant supply device is also included, which is used to connect to the coolant supply pipe to supply coolant to the cooling channel assembly.

[0022] As an improvement to the above technical solution, a nitrogen supply device is also included, which is used to connect to a coolant supply pipe or a coolant return pipe to dry the cooling channel assembly.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This invention relates to a fatigue testing system for a rotating mirror drive mechanism. The system uses a laser tracker and a target ball to monitor the position of the rotating mirror, and an encoder to monitor the angular displacement of the drive motor shaft. Multiple drive precision monitoring positions are selected within the rotation range of the rotating mirror, and multiple rounds of fatigue testing are performed on the rotating mirror drive mechanism. In each round of fatigue testing, the drive motor drives the rotating mirror to reciprocate multiple times via a transmission assembly. The drive motor then sequentially rotates the rotating mirror to each drive precision monitoring position. The laser tracker detects the actual position of the rotating mirror, and the encoder detects the actual angular displacement of the drive motor shaft. The maximum absolute value of the drive precision deviation of the rotating mirror at each drive precision monitoring position is the maximum drive precision deviation for that round of fatigue testing. If the maximum drive precision deviation exceeds a preset drive precision deviation value, the fatigue life test of the rotating mirror drive mechanism is terminated. Furthermore, if, in a certain round of fatigue testing, the absolute value of the difference between the actual angular displacement of the drive motor and the theoretical angular displacement of the drive motor corresponding to that drive precision monitoring position exceeds a preset angular displacement deviation value, the fatigue life test of the rotating mirror drive mechanism is terminated. A laser tracker, in conjunction with a target ball, can accurately monitor the position of the rotating mirror, ensuring the accuracy of position monitoring and thus minimizing the error in judging the rotational accuracy of the rotating mirror during fatigue testing of the rotating mirror drive mechanism. Since the rotating mirror only rotates once within its rotation range after the drive motor rotates multiple times, the encoder is sufficient to ensure the accuracy of angular displacement monitoring of the drive motor shaft. In summary, the combined use of the laser tracker, target ball, and encoder allows for accurate determination of the driving accuracy of the rotating mirror drive mechanism, meeting the requirements of fatigue testing of the rotating mirror drive mechanism. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the fatigue testing system for the rotating mirror drive mechanism provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the rotating mirror driving mechanism provided in this embodiment of the utility model. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of the rotating mirror driving mechanism provided in this embodiment of the utility model. Figure 2 ;

[0028] Figure 4 This is a cross-sectional view of a portion of the structure of the rotating mirror drive mechanism provided in this embodiment of the utility model. Figure 1 ;

[0029] Figure 2 This is a cross-sectional view of a portion of the structure of the rotating mirror drive mechanism provided in this embodiment of the utility model. Figure 1 .

[0030] In the picture:

[0031] 1. Rotating mirror drive mechanism;

[0032] 11. Drive motor;

[0033] 12. Transmission assembly; 121. Reducer; 122. Eccentric rod; 123. Rotating rod; 124. Cross shaft transmission mechanism; 125. Worm gear; 126. Sealing tube; 127. Magnetohydrodynamic sealing device; 128. Connecting assembly;

[0034] 13. Housing; 131. Sealed cavity; 132. Suction connector; 133. First cooling channel; 1331. First sub-channel; 1332. Second sub-channel; 134. Cooling jacket; 135. Fixing sleeve;

[0035] 14. Connecting pipe; 141. First sub-connecting pipe; 142. Second sub-connecting pipe; 15. Coolant supply pipe; 16. Coolant return pipe;

[0036] 17. First mounting base; 18. Second mounting base;

[0037] 10. Laser tracker;

[0038] 20. Target ball;

[0039] 30. Leak detector;

[0040] 40. Coolant supply equipment;

[0041] 100. Rotating mirror; 1001. Mirror body; 1002. Cooling plate. Detailed Implementation

[0042] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] like Figure 1 As shown, this embodiment provides a fatigue testing system for a rotating mirror drive mechanism, used for fatigue testing of a rotating mirror drive mechanism 1 used in a thermonuclear fusion device. The rotating mirror drive mechanism 1 includes a drive motor 11 and a transmission assembly 12. The drive motor 11 can drive the rotating mirror 100 to rotate through the transmission assembly 12. The fatigue testing system for the rotating mirror drive mechanism includes a laser tracker 10, a target ball 20, and an encoder. The target ball 20 is disposed on the rotating mirror 100. The laser tracker 10 is used to cooperate with the target ball 20 to monitor the position of the rotating mirror 100. The encoder is disposed on the drive motor 11 and is used to detect the angular displacement of the shaft of the drive motor 11.

[0047] The fatigue testing system for the rotating mirror drive mechanism provided in this embodiment uses a laser tracker 10 in conjunction with a target ball 20 to monitor the position of the rotating mirror 100 and an encoder to monitor the angular displacement of the shaft of the drive motor 11. Multiple drive precision monitoring positions are selected within the rotation range of the rotating mirror 100, and multiple rounds of fatigue tests are conducted on the rotating mirror drive mechanism 1. In each round of fatigue tests, the drive motor 11 drives the rotating mirror 100 to reciprocate multiple times through the transmission component 12. Then, the drive motor 11 is controlled to drive the rotating mirror 100 to rotate sequentially to each drive precision monitoring position. The laser tracker 10 detects the actual position of the rotating mirror 100, and the encoder detects the actual angular displacement of the drive motor 11 shaft. The maximum absolute value of the drive precision deviation of the rotating mirror 100 at each drive precision monitoring position is the maximum drive precision deviation of this round of fatigue tests. If the maximum drive precision deviation is greater than the preset drive precision deviation value, the fatigue life test of the rotating mirror drive mechanism 1 is terminated. Furthermore, if in a certain round of fatigue tests, the absolute value of the difference between the actual angular displacement of the drive motor 11 and the theoretical angular displacement of the drive motor 11 corresponding to that drive precision monitoring position is greater than the preset angular displacement deviation value of the drive motor, the fatigue life test of the rotating mirror drive mechanism 1 is terminated. The laser tracker 10, in conjunction with the target ball 20, can accurately monitor the position of the rotating mirror 100, ensuring the position monitoring accuracy of the rotating mirror 100 and thus preventing errors in judging the rotational accuracy of the rotating mirror 100 during the fatigue test of the rotating mirror drive mechanism 1. Since the rotating mirror 100 only rotates once within its rotation range after the drive motor 11 rotates multiple times, the encoder is sufficient to ensure the angular displacement monitoring accuracy of the drive motor 11 shaft. Through the above settings, the fatigue testing system for the rotating mirror drive mechanism provided in this embodiment can accurately determine the driving accuracy of the rotating mirror drive mechanism 1 on the rotating mirror 100, effectively ensuring the testing accuracy of the fatigue life test of the rotating mirror drive mechanism 1 and meeting the needs of the fatigue test of the rotating mirror drive mechanism 1.

[0048] In this embodiment, the laser tracker 10 is a Leica AT960, and the leak detector 30 is an EFCON UL1000. The specific method of mounting the encoder on the drive motor to detect the angular displacement of the drive motor is existing technology in the art and will not be described in detail here.

[0049] Furthermore, such as Figures 1-5 As shown, multiple target balls 20 are provided, and the multiple target balls 20 are spaced apart on the rotating mirror 100. The arrangement of multiple target balls 20 enables the laser tracker 10 to better track the position of the rotating mirror 100. In this embodiment, the rotating mirror 100 is quadrilateral, and a target ball 20 is provided in each of the four apex regions of the rotating mirror 100.

[0050] likeFigures 2-5 As shown, the rotating mirror drive mechanism 1 in this embodiment also includes a housing 13, which has a sealed cavity 131. The transmission component 12 is located in the sealed cavity 131, and both ends of the transmission component 12 in the length direction are exposed outside the housing 13. A suction connector 132 is provided on the housing 13, which connects the sealed cavity 131 with the outside of the housing 13.

[0051] The sealed cavity 131 within the housing 13 is a crucial structure that prevents the fusion chamber from communicating with the outside world via the drive mechanism, thus ensuring the fusion chamber maintains a vacuum environment. Therefore, if the seal of the sealed cavity 131 fails, the rotating mirror drive mechanism 1 will also fail to meet the usage requirements.

[0052] Therefore, the fatigue testing system for the rotating mirror drive mechanism in this embodiment also includes a leak detector 30, which is used to connect to the suction connector 132 to detect the sealing cavity 131.

[0053] When performing fatigue testing on the rotating mirror drive mechanism 1, in addition to testing the rotation accuracy of the rotating mirror 100 after rotating a certain number of times, the sealing performance of the sealing cavity 131 also needs to be tested by the leak detector 30. If the sealing cavity 131 fails to seal, the fatigue life test of the rotating mirror drive mechanism 1 ends.

[0054] like Figure 1 As shown, in this embodiment of the fatigue testing system for the rotating mirror drive mechanism, a first cooling channel 133 is provided inside the housing 13. The rotating mirror 100 includes a mirror body 1001 and a cooling plate 1002 fixedly attached to the back of the mirror body 1001. A second cooling channel is provided in the cooling plate 1002. The rotating mirror drive mechanism 1 also includes a connecting pipe 14, a coolant supply pipe 15, and a coolant return pipe 16. The connecting pipe 14 connects the housing 13 and the cooling plate 1002. A connecting channel is provided inside the connecting pipe 14, which connects the first cooling channel 133 and the second cooling channel. Both the coolant supply pipe 15 and the coolant return pipe 16 are connected to the housing 13 at one end. A supply channel is provided inside the coolant supply pipe 15, and a return channel is provided inside the coolant return pipe 16. The first cooling channel 133, the second cooling channel, the connecting channel, the supply channel, and the return channel form a cooling channel group. The first cooling channel 133 includes a first sub-channel 1331 and a second sub-channel 1332. The connecting pipe 14 includes a first sub-connecting pipe 141 and a second sub-connecting pipe 142. The coolant supply pipe 15 is connected to the coolant return pipe 16 via the first sub-channel 1331, the first sub-connecting pipe 141, the second cooling channel, the second sub-connecting pipe 142, and the second sub-channel 1332.

[0055] When the cooling channel assembly seal fails, the rotating mirror drive mechanism 1 can no longer meet the usage requirements. Therefore, in this embodiment, the leak detector 30 is also used to connect to the coolant supply pipe 15 or the coolant return pipe 16 to detect the cooling channel assembly. When the leak detector 30 is connected to the coolant supply pipe 15, it blocks the outlet of the coolant return pipe 16; when it is connected to the coolant return pipe 16, it blocks the inlet of the coolant supply pipe 15. During the fatigue test of the rotating mirror drive mechanism 1, the rotating mirror 100 needs to be leak-tested for the cooling channel assembly by the leak detector 30 after a certain number of rotations. If the cooling channel assembly seal fails, the fatigue life test of the rotating mirror drive mechanism 1 ends.

[0056] Optionally, such as Figures 1-5 As shown, the fatigue testing system for the rotating mirror drive mechanism in this embodiment also includes a coolant supply device 40, which is connected to the coolant supply pipe 15 to supply coolant to the cooling channel assembly. During fatigue testing of the rotating mirror drive mechanism 1, the drive motor 11 drives the rotating mirror 100 to rotate a certain number of times via the transmission assembly 12. During this process, the coolant supply device 40 introduces coolant into the cooling channel assembly through the coolant supply pipe 15 and maintains pressure at 5 MPa. During this process, the outlet of the coolant return pipe 16 is in a welded sealed state. The main purpose of using the coolant supply device 40 to introduce coolant into the coolant supply pipe 15 and maintain a pressure of 5 MPa is to ensure that the pressure within the cooling channel assembly is the same as during actual use of the rotating mirror drive mechanism, so that the fatigue testing process of the rotating mirror drive mechanism is closer to the actual operating conditions of the rotating mirror drive mechanism.

[0057] Optionally, the fatigue testing system for the rotating mirror drive mechanism in this embodiment further includes a nitrogen supply device. The nitrogen supply device is connected to the coolant supply pipe 15 or the coolant return pipe 16 to dry the cooling channel assembly. Specifically, in this embodiment, when the nitrogen supply device dries the cooling channel assembly, it is connected to the coolant supply pipe 15. Before using the leak detector 30 to check for leaks in the cooling channel assembly, the nitrogen supply device is used to dry any residual coolant in the cooling channel assembly to prevent the residual coolant from interfering with the leak detector 30's leak detection process. Before using the nitrogen supply device to dry the cooling channel assembly, the outlet of the welded and sealed coolant return pipe 16 needs to be cut open to allow nitrogen entering the cooling channel assembly to exit through the coolant return pipe 16. When the coolant supply device 40 is used again to fill the cooling channel assembly with coolant, the outlet of the coolant return pipe 16 is welded and sealed again.

[0058] like Figures 1-5As shown, the rotating mirror driving mechanism 1 in this embodiment also includes a first mounting base 17 and a second mounting base 18. The housing 13 is disposed on the first mounting base 17. Multiple first mounting bases 17 are provided, and the multiple first mounting bases 17 are spaced apart along the length direction of the housing 13.

[0059] like Figures 2-5 As shown, the rotating mirror drive mechanism 1 in this embodiment further includes a second mounting base 18. The transmission assembly 12 in this embodiment includes a reducer 121, an eccentric rod 122, a rotating rod 123, a cross-shaft transmission mechanism 124, a worm gear 125, and a pin. The pin is rotatably mounted on the second mounting base 18, and the rotating mirror 100 is connected to the pin. The eccentric rod 122 is disposed inside the housing 13, the reducer 121 is connected to the housing 13, and its output shaft extends into the housing 13 and is connected to one end of the eccentric rod 122. The other end of the eccentric rod 122 is connected to the rotating rod 123, and the end of the rotating rod 123 away from the eccentric rod 122 is exposed outside the housing 13. The worm gear 125 is disposed on the second mounting base 18. One end of the cross-shaft transmission mechanism 124 is connected to the end of the eccentric rod 122 exposed outside the housing 13, and the other end is connected to the input end of the worm gear 125. The output end of the worm gear 125 is connected to the pin. The drive motor 11 drives the pin shaft to rotate via the reducer 121, eccentric rod 122, rotating rod 123, cross-shaft transmission mechanism 124, and worm gear 125. The pin shaft drives the rotating mirror 100 to rotate, and the axis of rotation of the rotating mirror 100 is also the axis of the pin shaft. In this embodiment, the transmission ratio between the input and output ends of the reducer 121 is 20, and the transmission ratio between the input and output ends of the worm gear 125 is 62. Therefore, the transmission ratio between the drive motor 11 and the pin shaft is 1240. Specifically, the cross-shaft transmission mechanism 124 is a cross-shaft universal joint.

[0060] like Figure 4 As shown, the housing 13 in this embodiment includes a cooling sleeve 134 and a fixing sleeve 135. One end of the fixing sleeve 135 is fixedly connected to one end of the cooling sleeve 134, and the connection is sealed. An eccentric rod 122 is located inside the fixing sleeve 135, and a rotating rod 123 is located inside the cooling sleeve 134. The rotating rod 123 and the eccentric rod 122 are connected by a connecting assembly 128. The connecting assembly 128 is rotatably disposed at the connection between the fixing sleeve 135 and the cooling sleeve 134, with one end connected to the rotating rod 123 and the other end connected to the eccentric rod 122.

[0061] like Figure 5 and Figures 4-5As shown, the transmission assembly 12 in this embodiment also includes a sealing tube 126. The sealing tube 126 is sleeved on the outside of the eccentric rod 122, and the first end of the sealing tube 126 is sealed to the housing 13, and the second end is sealed to the outer periphery of the eccentric rod 122. Specifically, the first end of the sealing tube 126 is sealed to the end of the fixing sleeve 135 near the cooling sleeve 134. When the eccentric rod 122 rotates and swings, the second end of the sealing tube 126 will not rotate with the eccentric rod 122, thereby allowing the second end of the sealing tube 126 to be fixedly connected to the eccentric rod 122 using a flange structure, ensuring the sealing of the connection node between the second end of the sealing tube 126 and the eccentric rod 122. In this embodiment, the sealing tube 126 is a bellows.

[0062] like Figures 4-5 As shown, further, the transmission assembly 12 in this embodiment also includes a magnetic fluid sealing device 127. The magnetic fluid sealing device 127 is disposed at the end of the rotating rod 123 away from the sealing tube 126 and is connected to the housing 13. The rotating rod 123 passes through the magnetic fluid sealing device 127 and is exposed. The portion of the rotating rod 123 exposed in the magnetic fluid sealing device 127 is connected to the end of the cross shaft transmission mechanism 124 away from the rotating mirror 100. The magnetic fluid sealing device 127 is used to seal the end of the rotating rod 123 away from the drive motor 11. The magnetic fluid sealing device 127 is a prior art device, and its specific structure and working principle are common knowledge in the art, and will not be described in detail here.

[0063] like ​ As shown, the magnetohydrodynamic sealing device 127, cooling jacket 134, sealing tube 126, eccentric rod 122, connecting assembly 128, and rotating rod 123 enclose a sealing cavity 131. When the suction connector 132 is closed, the sealing cavity 131 is in a sealed state. In actual use of the rotating mirror drive mechanism 1, the drive motor 11, reducer 121, and fixed sleeve 135 are located outside the fusion chamber at the end near the drive motor 11, while the fixed sleeve 135 extends into the fusion chamber at the end near the cooling jacket 134, and the fixed sleeve 135 is sealed to the cavity wall of the fusion chamber. The presence of the sealing cavity 131 prevents air from outside the fusion chamber from entering the fusion chamber through the interior of the transmission assembly 12. This is also the reason why the fatigue testing system for the rotating mirror drive mechanism 1 provided in this embodiment needs to perform a sealing performance test on the sealing cavity 131 when conducting fatigue testing on the rotating mirror drive mechanism 1.

[0064] The rotating mirror 100 has a first design limit position and a second design limit position. The rotating mirror drive mechanism 1 is used to drive the rotating mirror 100 to rotate between the first design limit position and the second design limit position according to the usage requirements of the rotating mirror 100.

[0065] This embodiment also provides a fatigue life testing method for a rotating mirror drive mechanism, which uses the above-mentioned rotating mirror drive mechanism fatigue testing system to perform fatigue life testing on a rotating mirror drive mechanism for a thermonuclear fusion device, including:

[0066] Conduct a round of fatigue testing on the rotating mirror drive mechanism, and make a judgment on the fatigue test results of the rotating mirror drive mechanism in this round;

[0067] A fatigue test of the rotating mirror drive mechanism included:

[0068] The control drive motor 11 drives the rotating mirror 100 to reciprocate between the first design limit position and the second design limit position multiple times.

[0069] Multiple drive precision monitoring positions are selected within the rotation range of the rotating mirror 100. These multiple drive precision monitoring positions include a first design limit position and a second design limit position, as well as multiple positions located between the first design limit position and the second design limit position.

[0070] After the drive motor 11 drives the rotating mirror 100 to rotate back and forth between the first design limit position and the second design limit position multiple times, the drive motor 11 is controlled to drive the rotating mirror 100 to rotate to each drive accuracy monitoring position in sequence, and the drive accuracy deviation of the rotating mirror 100 at each drive accuracy monitoring position is monitored respectively. The maximum absolute value of the drive accuracy deviation of the rotating mirror 100 at each drive accuracy monitoring position is the maximum value of the drive accuracy deviation of the rotating mirror drive mechanism in this round of fatigue test.

[0071] This round of fatigue testing of the rotating mirror drive mechanism includes:

[0072] If the maximum value of the driving accuracy deviation in this round of fatigue test of the rotating mirror drive mechanism is not greater than the preset driving accuracy deviation value, then proceed to the next round of fatigue test of the rotating mirror drive mechanism.

[0073] If the maximum value of the drive accuracy deviation in this round of fatigue test of the rotating mirror drive mechanism is greater than the preset drive accuracy deviation value, the fatigue life test of the rotating mirror drive mechanism will be terminated.

[0074] If, during the fatigue test of the rotating mirror drive mechanism in this round, when the drive motor 11 drives the rotating mirror 100 to rotate to each drive accuracy monitoring position in sequence, the absolute value of the difference between the actual angular displacement of the drive motor 11 and the theoretical angular displacement of the drive motor 11 corresponding to the drive accuracy monitoring position is greater than the preset angular displacement deviation value of the drive motor, then the fatigue life test of the rotating mirror drive mechanism will be terminated.

[0075] Repeat the above process until the fatigue life test of the rotating mirror drive mechanism is terminated.

[0076] If the fatigue test of the rotating mirror drive mechanism is terminated after the mth round of the rotating mirror drive mechanism fatigue test, then the fatigue life of the rotating mirror drive mechanism 1 is equal to the sum of the number of reciprocating rotations of the rotating mirror 100 from the first round of the rotating mirror drive mechanism fatigue test to the (m-1)th round of the rotating mirror drive mechanism fatigue test, where m is a positive integer greater than 1.

[0077] The drive accuracy deviation of the rotating mirror 100 at the drive accuracy monitoring position is the difference between the actual position of the rotating mirror 100 monitored by the laser tracker 10 and the theoretical position of the drive accuracy monitoring position after the drive motor 11 receives the control command to drive the rotating mirror 100 to a certain drive accuracy monitoring position and drives the rotating mirror 100 to rotate. The actual angular displacement of the drive motor 11 is also the angular displacement of the drive motor 11 shaft detected by the encoder.

[0078] If the absolute value of the difference in theoretical angular displacement of drive motor 11 is greater than the preset angular displacement deviation value of drive motor 11, it indicates that the drive accuracy of drive motor 11 itself does not meet the requirements. When the absolute value of the difference in theoretical angular displacement of drive motor 11 is greater than the preset angular displacement deviation value of drive motor 11, the fatigue life test of the rotating mirror drive mechanism is terminated, which can further improve the accuracy of the fatigue life test of the rotating mirror drive mechanism.

[0079] Optionally, the drive motor 11 is controlled to drive the rotating mirror 100 to rotate sequentially to each drive accuracy monitoring position, and the drive accuracy deviation of the rotating mirror 100 at each drive accuracy monitoring position is monitored, including:

[0080] Control signals are sequentially sent to the drive motor 11 to drive the rotating mirror 100 to each drive accuracy monitoring position;

[0081] After each rotation of the drive motor 11, the actual angular displacement of the drive motor 11 is monitored by the encoder, and the actual position of the rotating mirror 100 is monitored by the laser tracker 10. If the absolute value of the difference between the actual angular displacement of the drive motor 11 and the theoretical angular displacement of the drive motor 11 corresponding to the drive accuracy monitoring position is not greater than the preset angular displacement deviation value of the drive motor, then the difference between the actual position of the rotating mirror 100 and the drive accuracy monitoring position is the drive accuracy deviation of the drive accuracy monitoring position.

[0082] In this embodiment, besides the first and second design limit positions of the rotating mirror 100, a drive accuracy monitoring position is taken every 0.3° between the first and second design limit positions of the rotating mirror 100. If the angle between the first and second design limit positions of the rotating mirror 100 is 30°, then there are a total of 101 drive accuracy monitoring positions. This means that 101 drive accuracy deviations will be obtained in each round of fatigue testing of the rotating mirror drive mechanism, and the maximum absolute value of these 101 drive accuracy deviations is the maximum drive accuracy deviation of this round of fatigue testing of the rotating mirror drive mechanism.

[0083] Optionally, in the first and second rounds of fatigue testing of the rotating mirror drive mechanism, the number of times the drive motor 11 drives the rotating mirror 100 to reciprocate is equal to the preset number. In this embodiment, the preset number is 2000 times.

[0084] In the fatigue test of the rotating mirror drive mechanism in the nth round, if the maximum value of the drive precision deviation in the (n-1)th round of the fatigue test is greater than the maximum value of the drive precision deviation in the (n-2)th round of the fatigue test, then the number of times the drive motor 11 drives the rotating mirror 100 to reciprocate in the nth round of the fatigue test is less than the number of times the drive motor 11 drives the rotating mirror 100 to reciprocate in the (n-1)th round of the fatigue test; if the maximum value of the drive precision deviation in the (n-1)th round of the fatigue test is not greater than the maximum value of the drive precision deviation in the (n-2)th round of the fatigue test, then the number of times the drive motor 11 drives the rotating mirror 100 to reciprocate in the nth round of the fatigue test is equal to the number of times the drive motor 11 drives the rotating mirror 100 to reciprocate in the (n-1)th round of the fatigue test, where n is a positive integer greater than 2.

[0085] Optionally, during the process of the drive motor 11 driving the rotating mirror 100 to reciprocate between the first and second design limit positions multiple times, the outlet of the coolant return pipe 16 is in a welded and sealed state, and the coolant supply device 40 supplies coolant to the cooling channel assembly through the coolant supply pipe 15, maintaining a preset pressure. In this embodiment, the preset pressure is 5 MPa. That is to say, during the process of the drive motor 11 driving the rotating mirror 100 to reciprocate between the first and second design limit positions, the coolant supply device 40 supplies coolant to the cooling channel assembly and maintains pressure, with a pressure of 5 MPa.

[0086] Optionally, fatigue testing of a rotating mirror drive mechanism also includes:

[0087] After the drive motor 11 drives the rotating mirror 100 to rotate back and forth between the first design limit position and the second design limit position multiple times, the leak detector 30 performs a leak test on the sealing cavity 131.

[0088] This round of fatigue testing and assessment of the rotating mirror drive mechanism also includes:

[0089] If the leak test of the sealing cavity 131 fails, the fatigue life test of the rotating mirror drive mechanism will be terminated. Specifically, the specific criteria for whether the leak test of the sealing cavity 131 passes or fails will be set as needed.

[0090] Optionally, fatigue testing of a rotating mirror drive mechanism also includes:

[0091] After the drive motor 11 drives the rotating mirror 100 to rotate back and forth between the first design limit position and the second design limit position multiple times, the outlet of the coolant return pipe 16 is cut open, and the cooling channel assembly is dried using a nitrogen supply device.

[0092] Then, weld and seal the outlet of the coolant return pipe 16, and connect the leak detector 30 to the coolant supply pipe 15 to check for leaks in the cooling channel assembly.

[0093] This round of fatigue testing and assessment of the rotating mirror drive mechanism also includes:

[0094] If the cooling channel assembly fails the leak test, the fatigue life test of the rotating mirror drive mechanism will be terminated. Specifically, the criteria for passing or failing the cooling channel assembly leak test will be set as needed.

[0095] It should be noted that, in this embodiment, the rotation of the rotating mirror 100 within its rotation range once means that the rotating mirror 100 rotates from the first design limit position to the second design limit position, or from the second design limit position to the first design limit position. The driving the rotating mirror 100 to rotate multiple times or a certain number of times, as mentioned in this embodiment, means driving the rotating mirror 100 to rotate multiple times or a certain number of times within its rotation range.

[0096] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A fatigue testing system for a rotating mirror drive mechanism, characterized in that, Fatigue testing of a rotating mirror drive mechanism for a thermonuclear fusion device. The rotating mirror drive mechanism includes a drive motor and a transmission assembly. The drive motor can drive the rotating mirror to rotate through the transmission assembly. The fatigue testing system for the rotating mirror drive mechanism includes a laser tracker, a target ball, and an encoder. The target ball is mounted on the rotating mirror; The laser tracker is used in conjunction with the target ball to monitor the position of the rotating mirror; The encoder is mounted on the drive motor and is used to detect the angular displacement of the drive motor shaft; The rotating mirror drive mechanism also includes a housing, which has a sealed cavity. The transmission component is located inside the sealed cavity, and both ends of the transmission component in the length direction are exposed outside the housing. A suction connector is provided on the housing, and the suction connector connects the sealed cavity to the outside of the housing. The fatigue testing system for the rotating mirror drive mechanism also includes a leak detector, which is used to connect with the suction connector to detect the sealing cavity.

2. The fatigue testing system for the rotating mirror drive mechanism according to claim 1, characterized in that, Multiple target balls are provided, and the multiple target balls are spaced apart on the rotating mirror.

3. The fatigue testing system for the rotating mirror drive mechanism according to claim 2, characterized in that, The rotating mirror is quadrilateral, and a target ball is set in each of the four apex regions of the rotating mirror.

4. The fatigue testing system for the rotating mirror drive mechanism according to claim 1, characterized in that, A first cooling channel is provided inside the housing; The rotating mirror includes a mirror body and a cooling plate fixedly attached to the back of the mirror body, wherein a second cooling channel is provided in the cooling plate; The rotating mirror driving mechanism further includes a connecting pipe, a coolant supply pipe, and a coolant return pipe. The connecting pipe connects the housing and the cooling plate. A connecting channel is provided inside the connecting pipe, which connects the first cooling channel and the second cooling channel. One end of both the coolant supply pipe and the coolant return pipe is connected to the housing. A supply channel is provided inside the coolant supply pipe, and a return channel is provided inside the coolant return pipe. The first cooling channel, the second cooling channel, the connecting channel, the liquid supply channel, and the liquid return channel form a cooling channel group.

5. The fatigue testing system for the rotating mirror drive mechanism according to claim 4, characterized in that, The leak detector is also used to connect to the coolant supply pipe or coolant return pipe to detect the cooling channel assembly.

6. The fatigue testing system for the rotating mirror drive mechanism according to claim 5, characterized in that, It also includes a coolant supply device for connecting to the coolant supply pipe to supply coolant to the cooling channel assembly.

7. The fatigue testing system for the rotating mirror drive mechanism according to claim 6, characterized in that, It also includes a nitrogen supply device, which is used to connect to a coolant supply pipe or a coolant return pipe to dry the cooling channel assembly.

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