An X-ray tube assembly

Abstract

The present application discloses an X-ray tube assembly, which includes a main housing, an electron beam deflection component, a tube core, and a drive component; the tube core includes a tube core housing, a cathode structure, and a target disc, and the cathode structure and the target disc are respectively located at both ends of the tube core housing; the electron beam deflection component is used to deflect the electron beam generated by the cathode structure; the main housing is provided with a tube core installation chamber and a drive installation chamber, the tube core is installed in the tube core installation chamber, the drive component is installed in the drive installation chamber, the drive component includes a bladeless turbine disc, the bladeless turbine disc includes a plurality of disc blades arranged in parallel at intervals and a driving rotating shaft connecting the disc blades in series, and the driving rotating shaft penetrates into the tube core installation chamber to be connected with the target disc of the tube core; the tube core installation chamber is provided with a cooling oil inlet and a cooling oil outlet, and the drive installation chamber is provided with a drive oil inlet and a drive oil outlet. The present application does not need to configure an insulation structure for different power supplies, which is beneficial to reducing the manufacturing difficulty of the X-ray tube assembly.

Description

Technical Field

[0001] This application relates to the field of X-ray technology, and particularly to an X-ray tube assembly. Background Art

[0002] An X-ray tube is a vacuum diode operating under high voltage, including two electrodes. The cathode includes a filament for emitting electrons, and the anode includes a target disk for receiving electron bombardment. Both electrodes are sealed in a high-vacuum housing.

[0003] When a high-speed electron beam bombards the target disk, X-rays are generated. Most of the energy during bombardment is converted into heat, and only a small part of the energy can be converted into X-rays, which will cause the temperature of the target disk to rise rapidly. To reduce the impact of high temperature on the service life of the target disk, it is necessary to dissipate heat from the target disk in a timely manner. Therefore, in the prior art, the target disk is set in a rotatable structural form, and the impact point of the electron beam on the target disk deviates from the rotation center of the target disk; during the operation of the X-ray tube, a driving component is used to drive the target disk to rotate rapidly during operation, so that the impact points of the electron beam on the target disk are dispersed in an annular area, thereby playing a role in dissipating heat from the target disk.

[0004] In the prior art, the driving of the target disk usually uses an energized coil to generate a rotating magnetic field and act on the rotor to form a magnetoelectric driving torque, that is, the driving is realized by using the working principle of an electric motor. For example, in the Chinese patent application with the application number 202310081845.7 filed by the applicant. The driving method using the working principle of an electric motor has a relatively complex structure; moreover, for an X-ray tube adopting the above driving form, in addition to providing a high-voltage power supply of tens of thousands of volts for the electrodes of the X-ray tube, it is also necessary to provide an additional power supply of 100V to 500V for the driving structure, and an insulation structure for insulating between different power supplies is required, which brings great challenges to the manufacturing of the X-ray tube. Summary of the Invention

[0005] In order to reduce the manufacturing difficulty of the X-ray tube assembly, this application provides an X-ray tube assembly.

[0006] An X-ray tube assembly provided by this application adopts the following technical solution:

[0007] An X-ray tube assembly includes a main housing, an electron beam deflection assembly, a tube core, and a drive assembly; the tube core includes a tube core housing, a cathode structure, and a target disk, the cathode structure and the target disk are respectively located at two ends of the tube core housing; the electron beam deflection assembly is used to deflect the electron beam generated by the cathode structure; the main housing is provided with a tube core installation chamber and a drive installation chamber, the tube core is installed in the tube core installation chamber, and the drive assembly is installed in the drive installation chamber; the drive assembly includes a bladeless turbine disk, the bladeless turbine disk includes a plurality of disk blades arranged in parallel at intervals and a driving rotating shaft connecting each of the disk blades; the driving rotating shaft penetrates into the tube core installation chamber and is connected to the target disk of the tube core; the tube core installation chamber is provided with a cooling oil inlet and a cooling oil outlet, the drive installation chamber is provided with a drive oil inlet and a drive oil outlet, the orientation of the drive oil inlet is consistent with the tangential direction of the disk blades, and the orientation of the drive oil outlet is parallel to the axial direction of the driving rotating shaft.

[0008] By adopting the above technical solution, when the X-ray tube assembly works, the cooling oil enters the tube core installation chamber from the cooling oil inlet and then is discharged from the cooling oil outlet to play a cooling role on the target disk. At the same time, the cooling oil enters the drive installation chamber from the drive oil inlet and then is discharged from the drive oil outlet. During the process that the cooling oil flows through the drive installation chamber, it drives the disk blades of the bladeless turbine disk to rotate, so that the driving rotating shaft of the bladeless turbine disk drives the target disk to rotate. The cooling oil used to cool the target disk simultaneously serves as a power source for driving the bladeless turbine disk to rotate, and there is no need to configure an insulation structure for different power sources, which is beneficial to reducing the manufacturing difficulty of the X-ray tube assembly.

[0009] Optionally, it further includes an auxiliary drive assembly, the auxiliary drive assembly includes a stator coil and a rotor magnet, the rotor magnet is installed on the driving rotating shaft, and the stator coil is installed on the main housing.

[0010] By adopting the above technical solution, in the initial stage of the operation of the X-ray tube assembly, while using the cooling oil to drive the bladeless turbine disk, the auxiliary drive assembly is used to drive the driving rotating shaft at the same time, so that the driving rotating shaft quickly reaches the preset standard range for rotating the turbine disk, and then the power supply of the auxiliary drive assembly is disconnected. Using the auxiliary drive assembly to pre-accelerate the driving rotating shaft can overcome the defect that the bladeless turbine disk starts slowly at low speed and improve the energy conversion efficiency. In addition, the high-voltage power supply for the electrodes of the X-ray tube can be enabled after the power supply of the auxiliary drive assembly is disconnected, so there is no need to consider the insulation problems between different voltage sources.

[0011] Optionally, one end of the driving rotating shaft away from the target disc penetrates through the driving oil outlet. The driving rotating shaft has an inner hole that penetrates through one end of the driving rotating shaft away from the die. A plurality of oil discharge holes are formed in the peripheral wall of the driving rotating shaft. The oil discharge holes are communicated with the inner hole and are located within the distribution range of the disc blades.

[0012] By adopting the above technical solution, during the process of the cooling oil flowing through the driving installation chamber, it first passes through the gap between adjacent disc blades of the bladeless turbine disc, then enters the inner hole of the driving rotating shaft through the oil discharge holes, and is then discharged from the inner hole of the driving rotating shaft.

[0013] Optionally, a communication hole is formed in the central region of the disc blade.

[0014] By adopting the above technical solution, the communication hole is provided in the central region of the disc blade, which can make the flow of the cooling oil along the axial direction of the driving rotating shaft in the driving installation chamber smoother.

[0015] Optionally, the main housing further has a pilot driving installation chamber, which is arranged side by side with the driving installation chamber and the die installation chamber. The pilot driving installation chamber has a pilot oil outlet; the driving rotating shaft extends into the pilot driving installation chamber, and the driving rotating shaft is provided with a pilot driving turbine, and the pilot driving turbine is located in the pilot driving installation chamber; the driving rotating shaft is provided with a pilot oil inlet hole communicated with the pilot driving installation chamber, and the driving rotating shaft is provided with a valve member for opening and closing the pilot oil inlet hole. The valve member includes a sealing plug and a resilient member. The sealing plug is located inside the inner hole and between the center line of the driving rotating shaft and the pilot oil inlet hole. The sealing plug is used to block the pilot oil inlet hole; the resilient member is used to force the sealing plug away from the pilot oil inlet hole; when the driving rotating shaft rotates at a speed within a preset standard range, the centrifugal force of the sealing plug can force the sealing plug to block the pilot oil inlet hole.

[0016] By adopting the above technical solution, in the initial stage of the operation of the X-ray tube assembly, the valve member is in an open state. The oil fluid enters the pilot driving installation chamber from the pilot oil inlet hole and then is discharged from the pilot oil outlet. During this process, the oil fluid flowing through the pilot driving installation chamber drives the pilot driving turbine to rotate. The pilot driving turbine can accelerate the starting rotation of the driving rotating shaft. When the rotation speed of the driving rotating shaft reaches the preset standard range of the rotating turbine disc, the centrifugal force of the sealing plug can force the sealing plug to block the pilot oil inlet hole, so as to disconnect the oil path in the pilot driving installation chamber and stop the pilot driving turbine from functioning, thereby making the rotation of the driving rotating shaft more stable.

[0017] Optionally, the cooling oil inlet and the cooling oil outlet are respectively located at two ends of the die mounting chamber, and are respectively located on both sides of the rotation center line of the die. The cooling oil inlet is used to allow the oil to enter the die mounting chamber tangentially, and the tangential direction of the oil inlet of the cooling oil inlet is consistent with the tangential direction of the rotation of the target disc.

[0018] By adopting the above technical solution, the cooling oil enters the die mounting chamber tangentially from the cooling oil inlet at one end of the die mounting chamber, and then flows to the cooling oil outlet located at the other end of the die mounting chamber, so that the cooling oil can form a swirling flow around the die housing in the die mounting chamber. The swirling movement direction of the cooling oil is consistent with the rotation direction of the die housing, which can reduce the hindrance of the cooling oil in the die mounting chamber to the rotation of the die housing.

[0019] Optionally, a partition inner shell is provided inside the main housing. Both ends of the partition inner shell are respectively rotatably connected to both ends of the main housing. The die is located on both sides of the partition inner shell, and through holes are respectively provided at both ends of the partition inner shell.

[0020] By adopting the above technical solution, after the cooling oil enters the die mounting chamber from the cooling oil inlet, it is divided into two paths. One path flows through the gap between the inner wall of the die mounting chamber and the partition inner shell, and the other path flows through the gap between the partition inner shell and the die housing through the through holes at both ends of the partition inner shell. The cooling oil flowing through the outside of the partition inner shell generates a swirling flow to drive the partition inner shell to rotate by using the boundary layer effect. The rotating partition inner shell and the rotating die housing jointly drive the cooling oil flowing through the inside of the partition inner shell; thus, two rotating components simultaneously drive the cooling oil in the smaller gap, which is beneficial to increasing the swirling flow speed of the cooling oil flowing through the inside of the partition inner shell, thereby further reducing the resistance during the rotation of the die housing.

[0021] Optionally, the driving oil inlet and the cooling oil outlet are connected through a pipeline; the main housing is provided with a bypass pipe. One end of the bypass pipe is connected to the driving oil inlet, and the other end is connected to the cooling oil inlet. The bypass pipe is provided with a regulating valve.

[0022] By adopting the above technical solution, when the X-ray tube assembly works, the cooling oil first flows through the die mounting chamber, and then flows through the driving mounting chamber, which is beneficial to increasing the flow rate of the cooling oil entering the driving mounting chamber. The cooling oil enters the driving mounting chamber in two paths. One path comes from the cooling oil outlet of the die mounting chamber, and the other path comes from the bypass pipe. By adjusting the opening degree of the regulating valve on the bypass pipe, the flow rate of the cooling oil flowing through the driving mounting chamber and the flow rate of the cooling oil flowing through the die mounting chamber can be balanced.

[0023] Optionally, the side wall of the driving installation chamber is provided with a plurality of oil distribution holes, which correspond to the disc blades one by one. A buffer chamber is provided on the outer side wall of the driving installation chamber, and the oil distribution holes are located in the buffer chamber; the driving oil inlet is opened in the buffer chamber, the orientation of the driving oil inlet is perpendicular to the orientation of the oil distribution holes, and the position of the driving oil inlet is staggered from the position of the oil distribution holes.

[0024] By adopting the above technical solution, the cooling oil first enters the buffer chamber, and then is split into the driving installation chamber through a plurality of oil distribution holes. The cooling oil entering the driving installation chamber from different oil distribution holes drives different disc blades, which is beneficial to improving the driving efficiency of the cooling oil on the bladeless turbine disc. After being buffered by the buffer chamber, the cooling oil can make the flow rate of the cooling oil flowing through different oil distribution holes more balanced.

[0025] Optionally, the outer peripheral surface of the buffer chamber is cylindrical, and the driving oil inlet is used to make the oil enter the buffer chamber tangentially.

[0026] By adopting the above technical solution, the outer peripheral surface of the buffer chamber is set to be cylindrical. When the driving oil inlet enters the buffer chamber tangentially, a swirling flow can be formed. The inner wall of the buffer chamber can play a guiding role in the cooling oil, which is beneficial to reducing the oil pressure loss of the cooling oil.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] When the X-ray tube assembly works, the cooling oil enters the tube core installation chamber from the cooling oil inlet, and then is discharged from the cooling oil outlet to play a cooling role on the target disc. The cooling oil used to cool the target disc also serves as the power source for driving the rotation of the bladeless turbine disc at the same time, and there is no need to configure an insulation structure for different power sources, which is beneficial to reducing the manufacturing difficulty of the X-ray tube assembly.

[0029] By providing a partition inner shell, two rotating components simultaneously drive the cooling oil in a smaller gap, which is beneficial to increasing the swirling flow speed of the cooling oil flowing through the inside of the partition inner shell, thereby further reducing the resistance during the rotation of the tube core housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of Embodiment 1.

[0031] Figure 2 is a schematic diagram of the structure of the driving installation chamber of Embodiment 1.

[0032] Figure 3 is a schematic diagram of the overall structure of Embodiment 2.

[0033] Figure 4 is a schematic diagram of the overall structure of Embodiment 3.

[0034] Figure 5 It is a schematic diagram of the overall structure of Embodiment 4.

[0035] Figure 6 It is a schematic diagram of the structure of the drive installation chamber of Embodiment 5.

[0036] Figure 7 It is in the buffer chamber of Embodiment 5 Figure 6 Schematic diagram in the A direction.

[0037] Figure 8 It is a schematic diagram of the structure of the drive installation chamber of Embodiment 6.

[0038] Figure 9 It is Figure 8 An enlarged view at B.

[0039] Explanation of reference numerals:

[0040] 100, X-ray tube assembly; 1, outer housing; 20, tube core assembly; 2, main housing; 21, tube core installation chamber; 211, cooling oil inlet; 212, cooling oil outlet; 22, drive installation chamber; 221, drive oil inlet; 222, drive oil outlet; 223, oil distribution hole; 23, pipeline; 24, bypass pipe; 241, regulating valve; 25, buffer chamber; 26, pilot drive installation chamber; 261, pilot oil outlet; 3, tube core; 31, tube core housing; 32, cathode structure; 322, filament; 33, target disc; 4, drive assembly; 41, bladeless turbine disc; 411, disc blades; 4111, communication holes; 412, driving rotating shaft; 4121, inner hole; 4122, oil discharge hole; 4123, pilot oil inlet hole; 4124, oil outlet hole on the shaft; 413, anode bearing; 42, pilot drive turbine; 43, auxiliary drive assembly; 431, stator coil; 432, rotor magnet; 5, electron beam deflection assembly; 6, partition inner shell; 61, through hole; 7, positive power supply; 8, negative power supply; 9, valve member; 91, valve body; 92, sealing plug; 93, resilient member; 10, intermediate flow dividing hole; 30, end flow dividing hole. Detailed implementation manners

[0041] The following further elaborates on this application in conjunction with the attached Figures 1-9 drawings.

[0042] Embodiment 1

[0043] This application embodiment discloses an X-ray tube assembly. Refer to Figure 1 and Figure 2, the X-ray tube assembly 100 includes an outer housing 1, a main housing 2, a tube core 3, a drive assembly 4, and an electron beam deflection assembly 5; the tube core 3 includes a tube core housing 31, a cathode structure 32, and a target disk 33, and the cathode structure 32 and the target disk 33 are respectively located at both ends of the tube core housing 31; the main housing 2 is provided with a tube core installation chamber 21 and a drive installation chamber 22, the tube core 3 is installed in the tube core installation chamber 21, the drive assembly 4 is installed in the drive installation chamber 22, the main housing 2 is installed inside the outer housing 1, and the main housing 2 and the components located in the main housing 2 together form the tube core assembly 20.

[0044] The electron beam deflection assembly 5 is installed inside the outer housing 1, and the electron beam deflection assembly 5 deflects the direction of the electron beam generated by the cathode structure 32 through an electric field or a magnetic field. Two electrodes or two magnetic poles of the electron beam deflection assembly 5 are respectively located on both sides of the main housing 2.

[0045] The tube core installation chamber 21 is provided with a cooling oil inlet 211 and a cooling oil outlet 212, and the drive installation chamber 22 is provided with a drive oil inlet 221 and a drive oil outlet 222. The drive assembly 4 is driven by the cooling oil flowing through the drive installation chamber 22; the cooling oil inlet 211 and the drive oil inlet 221 are directly connected to the pumping equipment of the cooling oil through a pipeline, and the cooling oil outlet 212 and the drive oil outlet 222 are connected to the outer housing 1 and indirectly connected to the pumping equipment of the cooling oil through an opening on the outer housing 1, so that the cooling oil circulates between the pumping equipment and the X-ray tube assembly 100.

[0046] When the X-ray tube assembly 100 works, the electron beam generated by the cathode structure 32 is deflected by the electron beam deflection assembly 5 and then hits a position on the target disk 33 that deviates from the rotation center; the cooling oil is pumped into the drive installation chamber 22, so that the drive assembly 4 drives the tube core 3 to rotate, and the impact points of the electron beam on the target disk 33 are dispersed in an annular area; at the same time, the cooling oil also flows through the tube core installation chamber 21, so that the side of the target disk 33 close to the drive assembly 4 exchanges heat with the cooling oil.

[0047] It should be noted that in this embodiment, a preferred solution for the cooling oil inlet 211 is to be set as an oval structure. The long axis of the oval is arranged along the axial direction of the active rotating shaft 412, the dimension range of the long axis of the oval is 3 - 5 cm, and the short axis range is 0.5 - 1 cm. The position of the cooling oil inlet 211 is close to the target disk 33, and when the cooling oil enters the tube core installation chamber 21 from the cooling oil inlet 211 in a tangential and swirling manner.

[0048] The driving component 4 includes a bladeless turbine disk 41. The bladeless turbine disk 41 includes a plurality of disk blades 411 arranged in parallel at intervals and a driving rotating shaft 412 connecting the disk blades 411 in series. The driving rotating shaft 412 penetrates into the die mounting chamber 21 and is fixedly connected to the target disk 33 of the die 3. The driving rotating shaft 412 is provided with an anode bearing 413, and the anode bearing 413 is installed on the side wall of the die mounting chamber 21 close to the driving mounting chamber 22. The driving oil inlet 221 is tangential to the disk blades 411, and the orientation of the driving oil outlet 222 is parallel to the axial direction of the driving rotating shaft 412. The driving oil outlet 222 also serves as the mounting hole of the driving rotating shaft 412. One end of the driving rotating shaft 412 away from the die 3 penetrates out of the driving oil outlet 222, and the driving rotating shaft 412 is connected to the driving oil outlet 222 of the driving mounting chamber 22 through a bearing.

[0049] The driving rotating shaft 412 is arranged as a tubular structure. The driving rotating shaft 412 has an inner hole 4121, and the inner hole 4121 penetrates through one end of the driving rotating shaft 412 away from the die 3. A plurality of oil discharge holes 4122 are formed on the peripheral wall of the driving rotating shaft 412, and the oil discharge holes 4122 are communicated with the inner hole 4121. The oil discharge holes 4122 are arranged within the distribution range of the disk blades 411 on the driving rotating shaft 412.

[0050] During the process that the cooling oil flows through the driving mounting chamber 22, it first passes through the gaps between adjacent disk blades 411 of the bladeless turbine disk 41, then enters the inner hole 4121 of the driving rotating shaft 412 from the oil discharge holes 4122, and is then discharged from the inner hole 4121 of the driving rotating shaft 412. During the process that the cooling oil flows through adjacent disk blades 411, the disk blades 411 are driven to rotate through the boundary layer effect, so that the bladeless turbine disk 41 rotates.

[0051] In this embodiment, one end of the driving rotating shaft 412 close to the die 3 is provided with an oil outlet hole 4124 on the shaft. Part of the oil in the inner hole 4121 can directly flow to the target disk 33 from the oil outlet hole 4124 on the shaft to cool the target disk 33.

[0052] In order to ensure the support strength of the driving rotating shaft 412, a solid bar can be filled at one end of the inner hole of the driving rotating shaft 412 close to the die 3. In this case, the oil outlet hole 4124 on the shaft does not need to be opened.

[0053] The cooling oil inlet 211 and the cooling oil outlet 212 are respectively located at both ends of the die mounting chamber 21 and on both sides of the rotation center line of the die 3. The cooling oil inlet 211 is used to make the oil enter the die mounting chamber 21 tangentially, and the tangential direction of the swirling flow of the oil entering the cooling oil inlet 211 is the same as the tangential direction of the rotation of the target disk 33. A partition inner shell 6 is arranged inside the main housing 2. Both ends of the partition inner shell 6 are rotatably connected to both ends of the main housing 2 respectively. The die 3 is located on both sides of the partition inner shell 6, and through holes 61 are respectively arranged at both ends of the partition inner shell 6.

[0054] The die housing 31, the partition inner shell 6, and the die mounting chamber 21 are all arranged in a dumbbell-shaped structure with a concave middle. The position of the electron beam deflection component 5 corresponds to the concave part of the die mounting chamber 21. Intermediate shunt holes 10 for the cooling oil to pass through are provided at the concave parts of the partition inner shell 6 and the die mounting chamber 21. In addition, end shunt holes 30 for the cooling oil to pass through are also provided at one end of the partition inner shell 6 away from the target disc. The diameters at both ends of the die housing 31 are 120 - 140 mm, specifically 130 mm in this embodiment.

[0055] The gaps between the partition inner shell 6 and the inner wall of the die mounting chamber 21, and between the partition inner shell 6 and the die housing 31 are both less than 3 mm, specifically 2 mm in this embodiment.

[0056] After the cooling oil enters the die mounting chamber 21 from the cooling oil inlet 211, it is divided into two paths. One path flows through the gap between the inner wall of the die mounting chamber 21 and the partition inner shell 6, and the other path flows through the gap between the partition inner shell 6 and the die housing 31 through the through holes 61 at both ends of the partition inner shell 6. The cooling oil flowing outside the partition inner shell 6 generates a swirl flow to drive the partition inner shell 6 to rotate by using the boundary layer effect. The rotating partition inner shell 6 and the rotating die housing 31 jointly drive the cooling oil flowing inside the partition inner shell 6; thus, two rotating components simultaneously drive the cooling oil in a smaller gap, which is beneficial to increasing the swirl flow speed of the cooling oil flowing inside the partition inner shell 6, thereby further reducing the resistance during the rotation of the die housing 31.

[0057] The cathode structure 32 is rotatably mounted on the side wall of the die mounting chamber 21 through a bearing. The cathode structure 32 has a filament 322, and the filament 322 extends into the inside of the die housing 31. The outer housing 1 is provided with a power supply positive electrode 7 and a power supply negative electrode 8. The power supply positive electrode 7 is electrically connected to the anode bearing 413, and thus electrically connected to the target disc 33. The power supply negative electrode 8 is electrically connected to the cathode structure 32.

[0058] When an X-ray tube assembly 100 of an embodiment of the present application works, the cooling oil enters the die mounting chamber 21 from the cooling oil inlet 211, and then is discharged from the cooling oil outlet 212 to play a cooling role on the target disc 33. At the same time, the cooling oil enters the drive mounting chamber 22 from the drive oil inlet 221, and then is discharged from the drive oil outlet 222. During the process of the cooling oil flowing through the drive mounting chamber 22, it drives the disc blades 411 of the bladeless turbine disc 41 to rotate, so that the driving rotating shaft 412 of the bladeless turbine disc 41 drives the target disc 33 to rotate. The cooling oil used for cooling the target disc 33 simultaneously serves as a power source for driving the bladeless turbine disc 41 to rotate, and there is no need to configure an insulation structure for different power supplies, which is beneficial to reducing the manufacturing difficulty of the X-ray tube assembly.

[0059] Embodiment 2

[0060] Refer toFigure 3 , the difference between this embodiment and Embodiment 1 is that the X-ray tube further includes an auxiliary driving component 43, and the auxiliary driving component 43 includes a stator coil 431 and a rotor magnet. The rotor magnet is installed on the outer peripheral surface of the driving rotating shaft 412 or on the disk blades 411 of the bladeless turbine disk 41, and the stator coil 431 is installed on the outer side wall of the main housing 2. Specifically, in this embodiment, it is installed on the side wall of the driving installation chamber 22 away from the tube core installation chamber 21.

[0061] In this embodiment, at the initial stage of the operation of the X-ray tube assembly 100, when the bladeless turbine disk 41 is driven by the cooling oil, the auxiliary driving component 43 is used to drive the driving rotating shaft 412 at the same time, so that the driving rotating shaft 412 quickly reaches the preset standard range of the rotating turbine disk, and then the power supply of the auxiliary driving component 43 is disconnected. By using the auxiliary driving component 43 to pre-accelerate the driving rotating shaft 412, the defect that the bladeless turbine disk 41 starts slowly at low speed can be overcome, and the energy conversion efficiency can be improved. In addition, the high-voltage power supply for the electrodes of the X-ray tube can be enabled after the power supply of the auxiliary driving component 43 is disconnected, so the problem of insulation between different voltage sources does not need to be considered.

[0062] Embodiment 3

[0063] Refer to Figure 4 , the difference between this embodiment and Embodiment 1 is that in this embodiment, the driving rotating shaft 412 is of a solid structure. In this embodiment, the mounting hole of the driving rotating shaft 412 needs to be set separately and is staggered from the driving oil outlet 222. A communication hole 4111 is provided in the central area of the disk blade 411 in this embodiment. In this embodiment, the cooling oil entering between the disk blades 411 is discharged from the driving oil outlet 222 after passing through the communication hole 4111.

[0064] Embodiment 4

[0065] Refer to Figure 5 , the difference between this embodiment and Embodiment 1 is that the driving oil inlet 221 and the cooling oil outlet 212 are connected through a pipeline 23. The main housing 2 is provided with a bypass pipe 24. One end of the bypass pipe 24 is connected to the driving oil inlet 221, and the other end is connected to the cooling oil inlet 211. The bypass pipe 24 is provided with a regulating valve 241, and the regulating valve 241 can specifically be a switching valve such as a ball valve or a globe valve.

[0066] When the X-ray tube assembly 100 is operating, the cooling oil first flows through the tube core installation chamber 21 and then flows into the driving installation chamber 22. The cooling oil enters the driving installation chamber 22 in two paths. One path comes from the cooling oil outlet 212 of the tube core installation chamber 21, and the other path comes from the bypass pipe 24. By controlling the opening degree of the regulating valve 241, the flow rate of the cooling oil flowing through the driving installation chamber 22 and the flow rate of the cooling oil flowing through the tube core installation chamber 21 can be balanced.

[0067] Example 5

[0068] Reference Figure 6 and Figure 7 In this example, the difference from Example 1 is that multiple oil distribution holes 223 are provided on the side wall of the drive installation chamber 22. The arrangement direction of the oil distribution holes 223 is consistent with the axial direction of the driving rotating shaft 412. Each oil distribution hole 223 corresponds to a disc blade 411 respectively, and the orientation of the oil distribution hole 223 is perpendicular to the axial direction of the driving rotating shaft 412.

[0069] A buffer chamber 25 is provided on the outer side wall of the drive installation chamber 22. The oil distribution holes 223 are located inside the buffer chamber 25. The drive oil inlet 221 is opened in the buffer chamber 25. The drive oil inlet 221 is indirectly connected to the drive installation chamber 22 through the buffer chamber 25 and the oil distribution holes 223. The orientation of the drive oil inlet 221 is perpendicular to the orientation of the oil distribution holes 223, and the position of the drive oil inlet 221 is staggeredly arranged with the position of the oil distribution holes 223. The outer peripheral surface of the buffer chamber 25 is cylindrical, and the drive oil inlet 221 is used to make the oil enter the buffer chamber 25 tangentially.

[0070] The cooling oil first enters the buffer chamber 25 tangentially, and then is split into the drive installation chamber 22 from multiple oil distribution holes 223. The cooling oil entering the drive installation chamber 22 from different oil distribution holes 223 drives different disc blades 411, which is beneficial to improving the driving efficiency of the cooling oil on the bladeless turbine disc 41.

[0071] Example 6

[0072] Reference Figure 8 and Figure 9 In this example, the difference from Example 1 is that the main housing 2 further has a pilot drive installation chamber 26. The pilot drive installation chamber 26 is located between the drive installation chamber 22 and the die installation chamber 21. The pilot drive installation chamber 26 has a pilot drive oil outlet 261; the driving rotating shaft 412 passes through the pilot drive installation chamber 26, and the driving rotating shaft 412 has a pilot drive turbine 42. The pilot drive turbine 42 is located inside the pilot drive installation chamber 26. When the pilot drive turbine 42 rotates, it can make the cooling oil generate centrifugal force.

[0073] The driving shaft 412 is provided with a pilot oil inlet hole 4123, and the pilot oil inlet hole 4123 is communicated with the pilot drive installation chamber 26. The driving shaft 412 is provided with a valve member 9 for opening and closing the pilot oil inlet hole 4123. The valve member 9 includes a valve body 91, a sealing plug 92 and a resilient member 93. The valve body 91 is of a cylindrical structure, fixedly connected to the driving shaft 412 and communicated with the inner hole 4121 of the driving shaft 412. The sealing plug 92 is located in the inner hole 4121 of the driving shaft 412 and between the central axis of the driving shaft 412 and the pilot oil inlet hole 4123. The sealing plug 92 is used to block the pilot oil inlet hole 4123. The resilient member 93 is a compression spring, located inside the valve body 91. One end of the compression spring is fixedly connected to the sealing plug 92, and the other end is fixedly connected to the valve body 91. The resilient member 93 is used to force the sealing plug 92 away from the pilot oil inlet hole 4123. When the driving shaft 412 rotates at a speed within the preset standard range, the centrifugal force of the sealing plug 92 can force the sealing plug 92 to block the pilot oil inlet hole 4123. The preset standard range of the rotational speed of the driving shaft 412 refers to the rotational speed range of the driving shaft 412 in the normal operating state of the X-ray tube assembly 100.

[0074] In this embodiment, in order to keep the driving shaft 412 balanced, the number of the pilot oil inlet holes 4123 is set to two, symmetrically arranged along the axis of the driving shaft 412, and the valve members 9 are correspondingly arranged in two for the pilot oil inlet holes 4123.

[0075] In the initial stage of the operation of the X-ray tube assembly 100, the valve member 9 is in an open state. The oil fluid enters the pilot drive installation chamber 26 from the pilot oil inlet hole 4123 and then is discharged from the pilot oil outlet 261. During this process, the oil fluid flowing through the pilot drive installation chamber 26 drives the pilot drive turbine 42 to rotate. The pilot drive turbine 42 can accelerate the starting rotation of the driving shaft 412. When the rotational speed of the driving shaft 412 reaches the preset standard range of the rotating turbine disc, the centrifugal force of the sealing plug 92 can force the sealing plug 92 to block the pilot oil inlet hole 4123, so as to disconnect the oil path in the pilot drive installation chamber 26 and stop the pilot drive turbine 42 from functioning, thereby making the rotation of the driving shaft 412 more stable.

[0076] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An X-ray tube assembly, characterized in that: The invention comprises a main shell (2), an electron beam deflection assembly (5), a tube core (3) and a drive assembly (4); the tube core (3) comprises a tube core shell (31), a cathode structure (32) and a target disk (33), the cathode structure (32) and the target disk (33) being respectively located at two ends of the tube core shell (31); the electron beam deflection assembly (5) is used to deflect the electron beam generated by the cathode structure (32); The main housing (2) is provided with a tube core installation chamber (21) and a drive installation chamber (22); the tube core (3) is installed in the tube core installation chamber (21), and the drive assembly (4) is installed in the drive installation chamber (22); The driving assembly (4) includes a bladeless turbine disk (41), the bladeless turbine disk (41) including a plurality of parallel and spaced circular blades (411) and a driving shaft (412) connected in series with the circular blades (411); the driving shaft (412) penetrates the tube core installation chamber (21) and is connected to the target disk (33) of the tube core (3); The tube core installation chamber (21) is provided with a cooling oil inlet (211) and a cooling oil outlet (212); the drive installation chamber (22) is provided with a drive oil inlet (221) and a drive oil outlet (222); the direction of the drive oil inlet (221) is consistent with the tangential direction of the disk blade (411); the direction of the drive oil outlet (222) is parallel to the axial direction of the active rotating shaft (412); The end of the active rotating shaft (412) away from the target disc (33) passes through the driving oil outlet (222), the active rotating shaft (412) has an inner hole (4121), the inner hole (4121) passes through the end of the active rotating shaft (412) away from the tube core (3), a plurality of oil drain holes (4122) are formed on the peripheral wall of the active rotating shaft (412), the oil drain holes (4122) are communicated with the inner hole (4121), and the oil drain holes (4122) are located within the distribution range of the disc blades (411).

2. The X-ray tube assembly according to claim 1, wherein: It also includes an auxiliary drive assembly (43), the auxiliary drive assembly including a stator coil (431) and a rotor magnet (432), the rotor magnet (432) being mounted on the driving shaft (412), and the stator coil (431) being mounted on the main housing (2).

3. The X-ray tube assembly according to claim 1, wherein: A communication hole (4111) is provided in the central area of the disc blade (411).

4. The X-ray tube assembly according to claim 1, wherein: The main housing (2) is further provided with a pilot drive installation chamber (26), the pilot drive installation chamber (26) being arranged side by side with the drive installation chamber (22) and the tube core installation chamber (21), and the pilot drive installation chamber (26) being provided with a pilot oil outlet (261); The active rotating shaft (412) extends into the pilot drive installation chamber (26), the active rotating shaft (412) is provided with a pilot drive turbine (42), and the pilot drive turbine (42) is located in the pilot drive installation chamber (26); The active rotating shaft (412) is provided with a pilot oil inlet hole (4123) in communication with the pilot drive mounting chamber (26). The active rotating shaft (412) is provided with a valve component (9) for opening and closing the pilot oil inlet hole (4123). The valve component (9) comprises a sealing plug (92) and a rebound component (93). The sealing plug (92) is located inside the inner hole (4121) and between the center line of the active rotating shaft (412) and the pilot oil inlet hole (4123). The sealing plug (92) is used to close the pilot oil inlet hole (4123); the rebound component (93) is used to force the sealing plug (92) to leave the pilot oil inlet hole (4123); when the active rotating shaft (412) is at a rotation speed within a preset standard range, the centrifugal force of the sealing plug (92) can force the sealing plug (92) to block the pilot oil inlet hole (4123).

5. The X-ray tube assembly according to claim 1, wherein: The cooling oil inlet (211) and the cooling oil outlet (212) are respectively located at two ends of the tube core installation chamber (21) and are respectively located on both sides of the rotation center line of the tube core (3). The cooling oil inlet (211) is used to allow oil to enter the tube core installation chamber (21) along a tangential direction. The oil inlet tangential direction of the cooling oil inlet (211) is consistent with the rotation tangential direction of the target disk (33).

6. An X-ray tube assembly according to claim 1, 2 or 4, characterized in that: A partition inner shell (6) is provided inside the main shell (2), and two ends of the partition inner shell (6) are rotatably connected to two ends of the main shell (2), the tube core (3) is located on both sides of the partition inner shell (6), and two ends of the partition inner shell (6) are provided with through holes (61).

7. The X-ray tube assembly according to claim 4, wherein: The driving oil inlet (221) is connected to the cooling oil outlet (212) via a pipe (23); the main housing (2) is provided with a bypass pipe (24), one end of the bypass pipe (24) is connected to the driving oil inlet (221), and the other end is connected to the cooling oil inlet (211); the bypass pipe (24) is provided with a regulating valve (241).

8. The X-ray tube assembly according to claim 1, wherein: The side wall of the drive installation chamber (22) is provided with a plurality of oil distribution holes (223), and the oil distribution holes (223) correspond one-to-one to the disc blades (411). The outer side wall of the drive installation chamber (22) is provided with a buffer chamber (25), and the oil distribution holes (223) are located in the buffer chamber (25); the drive oil inlet (221) is opened in the buffer chamber (25), the direction of the drive oil inlet (221) is perpendicular to the direction of the oil distribution holes (223), and the position of the drive oil inlet (221) and the position of the oil distribution holes (223) are staggered.

9. The X-ray tube assembly according to claim 8, wherein: The outer peripheral surface of the buffer chamber (25) is cylindrical, and the driving oil inlet (221) is used to allow oil to enter the buffer chamber (25) along a tangential direction.

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