An X-ray tube and a control method for the position of its anode rotating shaft

Abstract

The present invention relates to an X-ray tube, which comprises a housing, a cathode assembly, an anode assembly, an anode drive assembly and a monitoring assembly. The cathode assembly is arranged inside the housing. The anode assembly includes an anode rotating shaft and an anode target disc. The anode rotating shaft is arranged inside the housing, and the anode target disc is sleeved on the anode rotating shaft. The anode drive assembly is respectively arranged at both ends inside the housing and includes a magnetic induction ring and a magnetic drive ring. The magnetic induction rings are respectively connected to both ends of the anode rotating shaft. The magnetic induction ring is inserted into the magnetic drive ring and there is a gap between them. The magnetic drive ring is used to drive the magnetic induction ring to rotate and drive the anode rotating shaft to rotate. The monitoring assembly is connected to the anode drive assembly and is used to monitor and control the anode rotating shaft and the magnetic drive ring to always maintain coaxiality. When the anode rotating shaft of the present invention rotates, there will be no mechanical friction and contact fatigue, reducing the loss, reducing the vibration and noise, realizing that the anode rotating shaft and the magnetic drive ring always maintain coaxiality, ensuring high precision and high reliability during the rotation process, and having a simple structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of X-ray tubes, and particularly relates to an X-ray tube and a control method for the position of its anode rotating shaft. Background Art

[0002] The X-ray tube is one of the key components of medical imaging diagnostic equipment and is mainly used to generate X-rays. The X-ray tube generally includes a tube body, a cathode assembly, and an anode assembly. The cathode assembly and the anode assembly are relatively arranged in the tube body to form the cathode and anode of the X-ray tube respectively. The cathode assembly includes a filament, and the anode assembly includes an anode bearing, an anode target disc, etc. During the operation of the X-ray tube, after the filament is energized and heated, a high voltage is applied between the cathode and the anode. The free electrons outside the filament move directionally from the cathode to the anode under the action of a strong electric field. At the same time, the anode bearing drives the anode target disc to rotate at a high speed to withstand the bombardment of the electron beam generated by the cathode assembly, thereby generating bremsstrahlung and characteristic radiation, that is, forming X-rays.

[0003] Currently, most X-ray tubes drive the anode assembly to rotate at a high speed based on a stator wire package, and its structure is complex. The rotation is mainly achieved through ball bearings or liquid metal bearings, etc. The anode assembly using ball bearings mainly relies on the rolling of balls in the bearing track for power transmission. The balls bear all the weight of the anode assembly. However, after the anode assembly rotates for a long time, the temperature rises, causing damage to the balls, which will lead to unsmooth rolling of the balls in the bearing track, and it is easy to produce noise, vibration, and even jamming under high-frequency rotation. The anode assembly using liquid metal bearings mainly replaces traditional balls with liquid metal. The liquid metal fills the micron-scale gap between the bearing sleeve and the bearing rod, improving the load capacity and heat transfer capacity. Therefore, there are extremely high requirements for the precision of liquid metal bearings, increasing the difficulty of machining. And it also needs to cooperate with complex surface treatment processes and liquid metal flow channel designs to ensure the stable operation of liquid metal bearings. And if the liquid metal bearing is misoperated and rotated in the reverse direction, its surface or flow channel is damaged, then the liquid metal may leak, resulting in the failure of the X-ray tube and inability to continue working.

[0004] Therefore, how to ensure the stability and reliability during the rotation process, reduce vibration and noise, reduce the loss of rotating components, and at the same time simplify the overall structure of the X-ray tube is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] An object of the present invention is to provide an X-ray tube with a simple structure and good reliability to solve the problems existing in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An X-ray tube, comprising:

[0008] A housing: A ray outlet is provided on a side wall of the housing;

[0009] A cathode assembly: The cathode assembly is arranged inside the housing and at one end of the housing;

[0010] An anode assembly: The anode assembly includes an anode rotating shaft and an anode target disc. The anode rotating shaft is arranged inside the housing, and the anode target disc is sleeved on the anode rotating shaft;

[0011] The X-ray tube further includes an anode driving assembly. The anode driving assemblies are respectively arranged at two ends inside the housing. The anode driving assembly includes a magnetic induction ring and a magnetic driving ring. The magnetic induction rings are respectively connected to two ends of the anode rotating shaft. The magnetic induction rings are inserted into the magnetic driving ring, and there is a gap between the magnetic induction ring and the magnetic driving ring. The magnetic driving ring is used to generate magnetic induction to drive the magnetic induction ring to rotate, driving the anode rotating shaft to rotate; The X-ray tube further includes a monitoring assembly. The monitoring assembly is connected to the anode driving assembly. The monitoring assembly is used to monitor and control the axis of the anode rotating shaft and the axis of the magnetic driving ring to always remain coaxial.

[0012] Preferably, the monitoring assembly includes:

[0013] A monitoring member: The monitoring member is arranged on the magnetic driving ring. The monitoring member is used to monitor the position of the magnetic induction ring;

[0014] A controller: The controller is arranged outside the housing, and the controller is connected to the monitoring member and the magnetic driving ring.

[0015] Further preferably, the magnetic driving ring includes a ring housing and electromagnetic coils. A plurality of the electromagnetic coils are provided. The plurality of electromagnetic coils are arranged inside the ring housing and evenly distributed around the magnetic induction ring.

[0016] Even more preferably, a plurality of the monitoring members are provided, and one of the monitoring members is arranged between two adjacent electromagnetic coils.

[0017] Preferably, the gap between the magnetic induction ring and the magnetic driving ring is 0.5 - 0.8 mm.

[0018] Preferably, the X-ray tube further includes a shielding ring. The magnetic induction ring is sleeved on one end of the shielding ring. One end of the shielding ring is sleeved on the end of the anode rotating shaft. The other end of the shielding ring forms a shielding surface. The shielding surface is located between the anode target disc and the end of the anode rotating shaft, and the shielding surface covers the anode driving assembly. By providing the shielding ring, the heat radiated by the anode target disc can be effectively blocked to protect the anode driving assembly.

[0019] Preferably, the housing includes a first housing, a second housing, a third housing, and a fourth housing. One ends of the first housing and the second housing are respectively connected to both ends of the third housing, and the first housing, the second housing, and the third housing are coaxially arranged. The anode driving assembly is respectively arranged in the first housing and the second housing. The anode target disc is located in the third housing. One end of the fourth housing is connected to one end of the third housing. The cathode assembly is arranged in the fourth housing. The other end of the fourth housing forms a cathode high-voltage connection part.

[0020] More preferably, the diameters of the first housing and the second housing are less than or equal to the diameter of the third housing.

[0021] More preferably, heat dissipation layers are provided on the outer walls of the first housing, the second housing, and the third housing. The heat dissipation layers can quickly conduct away the heat radiated by the anode target disc to improve the heat dissipation efficiency.

[0022] More preferably, the other ends of the first housing and the second housing are respectively sealed by a first end cover and a second end cover. A first rotating support and a second rotating support are respectively provided on the first end cover and the second end cover. The first rotating support is located in the first housing, and the end of the anode rotating shaft is rotatably connected to the first rotating support. A through hole is provided on the second end cover. One end of the second rotating support is located in the second housing, and the end of the anode rotating shaft is rotatably connected to one end of the second rotating support. The other end of the second rotating support is inserted into the through hole and forms an anode high-voltage connection part.

[0023] Even more preferably, the X-ray tube further includes a first annular bracket and a second annular bracket. The outer side wall of the first annular bracket is fixedly connected to the inner side wall of the first housing. The inner side wall of the first annular bracket is fixedly connected to the outer side walls of the magnetic drive ring and the first end cover. The outer side wall of the second annular bracket is fixedly connected to the inner side wall of the second housing. The inner side wall of the second annular bracket is fixedly connected to the outer side walls of the magnetic drive ring and the second end cover.

[0024] More preferably, both the first end cap and the second end cap are made of insulating materials, and the insulating materials include ceramic materials.

[0025] More preferably, jacks are provided on both the first end cap and the second end cap, and connectors are arranged in the jacks. The connectors are connected to the monitoring component and the magnetic drive ring through wires.

[0026] More preferably, one end of the connector facing the inside of the housing is connected to the magnetic drive ring and the monitoring member through wires, and the end of the connector facing the outside of the housing is connected to the controller through wires.

[0027] Another object of the present invention is to provide a control method for the position of the anode rotating shaft of an X-ray tube.

[0028] To achieve the above object, the technical solution adopted by the present invention is:

[0029] A control method for the position of the anode rotating shaft of an X-ray tube, where the X-ray tube is the X-ray tube in the foregoing technical solution. The magnetic drive ring includes a plurality of electromagnetic coils, and the plurality of electromagnetic coils are evenly distributed around the magnetic induction ring; the monitoring component includes a plurality of monitoring members and a controller arranged on the magnetic drive ring. One monitoring member is arranged between adjacent two of the electromagnetic coils.

[0030] The control method includes the following steps:

[0031] S1: The plurality of monitoring members respectively obtain the distances between themselves and the magnetic induction ring, and send the distance data to the controller.

[0032] S2: The controller determines whether there are deviations in the plurality of distance data. If there are no deviations, the anode rotating shaft and the magnetic drive ring are coaxial. If there are deviations, the controller sends a control signal to the magnetic drive ring.

[0033] S3: The magnetic drive ring receives the control signal sent by the controller, and adjusts the magnitudes of the currents of the electromagnetic coils on both sides of the monitoring member at the position with deviations according to the control signal, so that the magnitudes of the driving magnetic forces generated by them change until the anode rotating shaft and the magnetic drive ring are coaxial.

[0034] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0035] The present invention drives the anode rotating shaft to rotate through the mutual cooperation of a magnetic induction ring and a magnetic drive ring. During the rotation process, no mechanical friction and contact fatigue are generated, greatly reducing losses, and reducing vibration and noise. By setting up a monitoring component to monitor and control the rotation attitude of the anode rotating shaft, the anode rotating shaft and the magnetic drive ring can always be kept coaxial, ensuring high precision and high reliability during the rotation process, reducing the risk of damage, improving safety, and having a simple overall structure, a relatively small overall volume and weight, realizing miniaturization, and having a relatively low processing and manufacturing difficulty and production cost. Brief Description of the Drawings

[0036] Appendix Figure 1 is a three-dimensional schematic diagram of the X-ray tube of the present invention;

[0037] Appendix Figure 2 is a side view schematic diagram of the X-ray tube of the present invention;

[0038] Appendix Figure 3 is the sectional view along A-A in Appendix Figure 2 ;

[0039] Appendix Figure 4 is the partial enlarged schematic diagram at position B in Appendix Figure 3 ;

[0040] Appendix Figure 5 is a three-dimensional schematic diagram of the magnetic drive ring of the present invention;

[0041] Appendix Figure 6 is a schematic diagram of the anode rotating shaft and the magnetic drive ring of this embodiment keeping coaxial;

[0042] Appendix Figure 7 is a schematic diagram of the anode rotating shaft and the magnetic drive ring of this embodiment being offset.

[0043] In the above drawings: 1. Housing; 11. First housing; 110. First end cover; 111. First rotating support; 12. Second housing; 120. Second end cover; 1201. Through hole; 1202. Connector; 121. Second rotating support; 1211. Anode high-voltage connection part; 13. Third housing; 130. Ray outlet; 14. Fourth housing; 140. Cathode high-voltage connection part; 2. Cathode assembly; 3. Anode assembly; 31. Anode rotating shaft; 32. Anode target disc; 4. Anode drive assembly; 41. Magnetic induction ring; 42. Magnetic drive ring; 421. Ring housing; 422. Electromagnetic coil; 5. Monitoring component; 51. Monitoring piece; 6. Shielding ring; 60. Shielding surface; 71. First annular bracket; 72. Second annular bracket. Detailed Description of the Invention

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying 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, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] An X-ray tube, as Figure 1 and Figure 2 shown, includes a housing 1, a cathode assembly 2, an anode assembly 3, and an anode drive assembly 4. The cathode assembly 2 is disposed in the housing 1 and at one end of the housing 1. The anode assembly 3 and the anode drive assembly 4 are both disposed in the housing 1, and the anode assembly 3 is connected to the anode drive assembly 4. The anode drive assembly 4 is used to drive the anode assembly 3 to rotate.

[0047] The following will specifically introduce each component and its connection relationship in detail:

[0048] The housing 1 specifically includes a first housing 11, a second housing 12, a third housing 13, and a fourth housing 14. As Figure 3 shown, the first housing 11 and the second housing 12 are respectively connected to both ends of the third housing 13. The fourth housing 14 is connected to one end of the third housing 13 and is on the same side as the first housing 11. Specifically:

[0049] One end of the first housing 11 is connected to one end of the third housing 13, and the first housing 11 and the third housing 13 are coaxially arranged. The diameter of the first housing 11 is less than or equal to the diameter of the third housing 13. The other end of the first housing 11 is sealed by a first end cap 110. Specifically, a first annular bracket 71 is provided at the other end of the first housing 11. The outer side wall of the first annular bracket 71 is fixedly connected to the inner side wall of the other end of the first housing 11 by welding or other means. The inner side wall of the first annular bracket 71 is fixedly connected to the outer side wall of the first end cap 110. The first end cap 110 is made of an insulating material, such as ceramic material.

[0050] One end of the second housing 12 is connected to the other end of the third housing 13, and the first housing 11 and the third housing 13 are coaxially arranged. The diameter of the second housing 12 is less than or equal to the diameter of the third housing 13. The other end of the second housing 12 is sealed by a second end cap 120. Specifically, a second annular bracket 72 is provided at the other end of the second housing 12. The outer side wall of the second annular bracket 72 is fixedly connected to the inner side wall of the other end of the second housing 12 by welding or other means. The inner side wall of the second annular bracket 72 is fixedly connected to the outer side wall of the second end cap 120. The second end cap 120 is made of an insulating material, such as ceramic material. In this embodiment: The second housing 12 and the third housing 13 are integrally formed.

[0051] The side wall of the third housing 13 has a radiation outlet 130 for X-rays to emit from the housing 1; One end of the fourth housing 14 is connected to one end of the third housing 13, and the fourth housing 14 is located at the side of the first housing 11; Heat dissipation layers are provided on the outer walls of the first housing 11 and the second housing 12, and a heat dissipation layer is also provided on the outer wall of the third housing 13 except at the radiation outlet 130. The heat dissipation layer can quickly conduct away the heat transferred to the housing 1 during the operation of the X-ray tube, improving the heat dissipation efficiency.

[0052] The cathode assembly 2 is arranged in the fourth housing 14, and a cathode high-voltage connection part 140 is formed at the other end of the fourth housing 14. The cathode high-voltage connection part 140 is used to connect the cathode high voltage.

[0053] The anode assembly 3 is arranged in the first housing 11, the second housing 12 and the third housing 13. The anode assembly 3 specifically includes an anode rotating shaft 31 and an anode target disc 32. The two ends of the anode rotating shaft 31 are respectively located in the first housing 11 and the second housing 12. The anode target disc 32 is sleeved on the anode rotating shaft 31. Specifically:

[0054] A first rotating support 111 is provided at the center of the first end cap 110, and the first rotating support 111 is located in the first housing 11. One end of the anode rotating shaft 31 is rotatably connected to the first rotating support 111; A second rotating support 121 is provided at the center of the second end cap 120. Specifically, a through hole 1201 penetrating its inner and outer surfaces is opened at the center of the second end cap 120. One end of the second rotating support 121 is located in the second housing 12, and the other end of the second rotating support 121 is inserted into the through hole 1201 and forms an anode high-voltage connection part 1211. The anode high-voltage connection part 1211 is used to connect the anode high voltage. The other end of the anode rotating shaft 31 is rotatably connected to the second rotating support 121.

[0055] The anode target disk 32 is sleeved on the anode rotating shaft 31, and the anode target disk 32 is located inside the third housing 13. Specifically, the anode target disk 32 can be fixedly connected to the anode rotating shaft 31 by screws, but of course, it is not limited to this connection method.

[0056] The anode driving assembly 4 is used to drive the anode rotating shaft 31 to rotate at a high speed around its own axis, and the anode driving assembly 4 is provided in both the first housing 11 and the second housing 12. The anode driving assembly 4 specifically includes a magnetic induction ring 41 and a magnetic driving ring 42. The magnetic driving rings 42 are respectively fixedly provided in the first housing 11 and the second housing 12, and the magnetic induction rings 41 are respectively connected to both ends of the anode rotating shaft 31, and the magnetic induction rings 41 are inserted into the magnetic driving rings 42.

[0057] Specifically: as Figure 4 shown, both ends of the anode rotating shaft 31 are respectively inserted into the magnetic driving ring 42, the magnetic induction rings 41 are respectively sleeved on both ends of the anode rotating shaft 31, there is a gap between the magnetic induction ring 41 and the magnetic driving ring 42, and the gap between the magnetic induction ring 41 and the magnetic driving ring 42 is preferably 0.5 - 0.8 mm. The outer side wall of the magnetic driving ring 42 located in the first housing 11 is fixedly connected to the inner side wall of the first annular bracket 71, and the outer side wall of the magnetic driving ring 42 located in the second housing 12 is fixedly connected to the inner side wall of the second annular bracket 72. The magnetic driving ring 42 specifically includes a ring housing 421 and an electromagnetic coil 422. As Figure 5 shown, there are multiple electromagnetic coils 422. The multiple electromagnetic coils 422 are arranged in the ring housing 421 and are evenly distributed along the circumferential direction of the ring housing 421. And because the magnetic induction ring 41 is inserted into the magnetic driving ring 42, the multiple electromagnetic coils 422 are evenly distributed around the magnetic induction ring 41. The magnetic driving ring 42 is used to generate magnetic induction to drive the magnetic induction ring 41 to rotate, driving the anode rotating shaft 31 to rotate. After the electromagnetic coil 422 is powered on and operates, the rotational speed of the magnetic induction ring 41 can reach 10000 r / min within 1 s, and can be maintained at 1000 - 12000 r / min. The magnetic induction ring 41 can rotate with a maximum load of 7.5 kg of the anode assembly 3, and the magnetic induction ring 41 can be braked within 0.5 s after the electromagnetic coil 422 is powered off. The vibration generated by the anode assembly 3 due to high-speed rotation is also relatively low, and the vibration acceleration is lower than 0.2 mm / s 2 , and the noise generated by rotation can be as low as below 55 decibels.

[0058] To block the heat radiated by the anode target disc 32 during the working process and protect the anode drive assembly 4, a shielding ring 6 is further provided in the housing 1. The shielding ring 6 is respectively arranged at both ends of the anode rotating shaft 31. Specifically: One end of the shielding ring 6 is sleeved on the end of the anode rotating shaft 31, the magnetic induction ring 41 is sleeved on one end of the shielding ring 6 and inserted into the magnetic drive ring 42; The other end of the shielding ring 6 is located outside the magnetic drive ring 42, and a shielding surface 60 is formed at the other end of the shielding ring 6. The shielding surface 60 is located between the anode target disc 32 and the end of the anode rotating shaft 31, and the shielding surface 60 can cover the anode drive assembly 4.

[0059] In addition, to keep the axis of the anode rotating shaft 31 and the axis of the magnetic drive ring 42 always coaxial, the X-ray tube further includes a monitoring assembly 5. The monitoring assembly 5 is connected to the anode drive assembly 4, and the monitoring assembly 5 is used to monitor and control the rotation posture of the anode rotating shaft 31. Specifically:

[0060] The monitoring assembly 5 includes a monitoring member 51 and a controller (not shown in the figure). The monitoring member 51 is used to monitor the position of the magnetic induction ring 41. The monitoring member 51 is arranged in the ring housing 421. There are multiple monitoring members 51, and the multiple monitoring members 51 are evenly distributed around the circumference of the ring housing 421, that is, one monitoring member 51 is arranged between two adjacent electromagnetic coils 422. The monitoring member 51 can monitor the distance from itself to the magnetic induction ring 41; The controller is arranged outside the housing 1. The controller is used to send a control signal to the magnetic drive ring 42 according to the monitoring result of the monitoring member 51, so that the axis of the anode rotating shaft 31 and the axis of the magnetic drive ring 42 always remain coaxial. The controller can be connected to the monitoring member 51 and the magnetic drive ring 42 through wires. Specifically, jacks are opened on both the first end cover 110 and the second end cover 120. Plug connectors 1202 are arranged in the jacks. One end of the plug connector 1202 facing the inside of the housing 1 is connected to the magnetic drive ring 42 and the monitoring member 51 through wires, and one end of the plug connector 1202 facing the outside of the housing 1 is connected to the controller through wires.

[0061] The following specifically elaborates the steps to keep the anode rotating shaft 31 and the magnetic drive ring 42 coaxial during the working process of the X-ray tube. Specifically:

[0062] S1: Multiple monitoring members 51 respectively obtain the distances between themselves and the magnetic induction ring 41, obtain multiple distance data, and send the multiple distance data to the controller;

[0063] S2: The controller judges whether there is a deviation in the multiple distance data. If there is no deviation, the anode rotating shaft 31 and the magnetic drive ring 42 are coaxial. If there is a deviation, the controller sends a control signal to the magnetic drive ring 42;

[0064] S3: The magnetic drive ring 42 receives the control signal sent by the controller, and adjusts the current magnitudes of the electromagnetic coils 422 on both sides of the monitoring member 51 at the deviated position according to the control signal, so that the magnitudes of the driving magnetic forces generated by them change until the anode rotating shaft 31 and the magnetic drive ring 42 are coaxial.

[0065] Embodiment

[0066] In this embodiment, nine electromagnetic coils 422 are arranged inside the ring housing 421 of the magnetic drive ring 42. The nine electromagnetic coils 422 are evenly distributed circumferentially around the ring housing 421. Nine monitoring members 51 are also provided. One monitoring member 51 is arranged between two adjacent electromagnetic coils 422. The magnetic induction ring 41 is inserted into the magnetic drive ring 42. When the electromagnetic coils 422 are energized, magnetic induction can be generated to drive the magnetic induction ring 41 to rotate, driving the anode rotating shaft 31 to rotate.

[0067] As Figure 6 shown, during the working process, when the anode rotating shaft 31 and the magnetic drive ring 42 are coaxial, the distances between each monitoring member 51 and the magnetic induction ring 41 are d1, d2, …, d8, d9 respectively, and the values of d1, d2, …, d8, d9 are all 3 mm. The controller judges that the nine distance data are equal. Therefore, there is no need to adjust the position of the anode rotating shaft 31. At this time, the currents of the nine electromagnetic coils 422 are all 5.5 A.

[0068] During the working process, if the position of the anode rotating shaft 31 shifts, that is, the position of the magnetic induction ring 41 shifts. As Figure 7 shown, the actual position of the magnetic induction ring 41 has deviated from its coaxial position with the magnetic drive ring 42 (the dotted line position in the figure). At this time, the distances between each monitoring member 51 and the magnetic induction ring 41 are d1', d2', …, d8', d9' respectively, and d1' = 2.87 mm, d2' = 3.05 mm, d3' = 3.14 mm, d4' = 3.21 mm, d5' = 3.09 mm, d6' = 3.02 mm, d7' = 2.95 mm, d8' = 2.89 mm, d9' = 2.83 mm. The controller judges that there are deviations in the nine distance data, and then sends a control signal to the magnetic drive ring 42 to adjust the currents of the electromagnetic coils 422 numbered 2, 3, 4, and 5 to 5 A + 0.05 A, keep the current of the electromagnetic coil 422 numbered 6 at 5.5 A unchanged, and adjust the currents of the electromagnetic coils 422 numbered 7, 8, 9, and 1 to 6 A - 0.05 A, so that the anode rotating shaft 31 and the magnetic drive ring 42 return to the coaxial state.

[0069] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A control method for the position of the anode rotating shaft of an X-ray tube, the X-ray tube comprising: A housing: A ray outlet is provided on the side wall of the housing; A cathode assembly: The cathode assembly is arranged inside the housing and at one end of the housing; An anode assembly: The anode assembly includes an anode rotating shaft and an anode target disc. The anode rotating shaft is arranged inside the housing, and the anode target disc is sleeved on the anode rotating shaft; An anode driving assembly: The anode driving assembly is respectively arranged at both ends inside the housing. The anode driving assembly includes a magnetic induction ring and a magnetic driving ring. The magnetic induction rings are respectively connected to both ends of the anode rotating shaft. The magnetic induction ring is inserted into the magnetic driving ring, and there is a gap between the magnetic induction ring and the magnetic driving ring. The magnetic driving ring is used to generate magnetic induction to drive the magnetic induction ring to rotate and drive the anode rotating shaft to rotate. The magnetic driving ring includes a plurality of electromagnetic coils, and the plurality of electromagnetic coils are evenly distributed around the magnetic induction ring; A monitoring assembly: The monitoring assembly is connected to the anode driving assembly. The monitoring assembly is used to monitor and control the axis of the anode rotating shaft and the axis of the magnetic driving ring to always be coaxial. The monitoring assembly includes a plurality of monitoring members and a controller arranged on the magnetic driving ring. One of the monitoring members is arranged between adjacent two of the electromagnetic coils, characterized in that: The control method includes the following steps: S1: A plurality of the monitoring members respectively acquire the distance between themselves and the magnetic induction ring, and send the distance data to the controller; S2: The controller determines whether there is a deviation in the plurality of distance data. If there is no deviation, the anode rotating shaft and the magnetic driving ring are coaxial. If there is a deviation, the controller sends a control signal to the magnetic driving ring; S3: The magnetic driving ring receives the control signal sent by the controller, and adjusts the current magnitudes of the electromagnetic coils on both sides of the monitoring member at the position with deviation according to the control signal, so that the magnitude of the driving magnetic force generated by it changes until the anode rotating shaft and the magnetic driving ring are coaxial.

2. The control method according to claim 1, characterized in that: The monitoring member is arranged on the magnetic driving ring, and the monitoring member is used to monitor the position of the magnetic induction ring; The controller is arranged outside the housing, and the controller is connected to the monitoring member and the magnetic driving ring.

3. The control method according to claim 2, characterized in that: The magnetic driving ring includes a ring housing, and a plurality of the electromagnetic coils are arranged inside the ring housing.

4. The control method according to claim 3, characterized in that: A plurality of the monitoring members are provided.

5. The control method according to claim 1, characterized in that: The gap between the magnetic induction ring and the magnetic driving ring is 0.5 - 0.8 mm.

6. The control method according to claim 1, characterized in that: The X-ray tube further includes a shielding ring. The magnetic induction ring is sleeved at one end of the shielding ring. One end of the shielding ring is sleeved at the end of the anode rotating shaft. The other end of the shielding ring forms a shielding surface. The shielding surface is located between the anode target disc and the end of the anode rotating shaft, and the shielding surface covers the anode driving assembly.

7. According to the control method described in claim 1, it is characterized in that: The housing includes a first housing, a second housing, a third housing, and a fourth housing. One ends of the first housing and the second housing are respectively connected to both ends of the third housing, and the first housing, the second housing, and the third housing are coaxially arranged. The anode driving assembly is respectively arranged in the first housing and the second housing. The anode target disc is located in the third housing. One end of the fourth housing is connected to one end of the third housing. The cathode assembly is arranged in the fourth housing. The other end of the fourth housing forms a cathode high-voltage connection part.

8. According to the control method described in claim 7, it is characterized in that: The other ends of the first housing and the second housing are respectively sealed by a first end cap and a second end cap. A first rotary support and a second rotary support are respectively arranged on the first end cap and the second end cap. The first rotary support is located in the first housing, and the end of the anode rotating shaft is rotatably connected to the first rotary support. A through hole is formed in the second end cap. One end of the second rotary support is located in the second housing, and the end of the anode rotating shaft is rotatably connected to one end of the second rotary support. The other end of the second rotary support is inserted into the through hole and forms an anode high-voltage connection part.

9. According to the control method described in claim 8, it is characterized in that: Jack holes are formed in both the first end cap and the second end cap. A connector is arranged in the jack hole. The connector is connected to the monitoring component and the magnetic drive ring through wires.

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