An x-ray tube assembly

Abstract

This invention belongs to the field of X-ray tube technology and discloses an X-ray tube assembly. The X-ray tube assembly includes a vacuum tube shell, an anode assembly, and a dynamic seal. The vacuum tube shell has a first through-hole. The anode assembly includes a rotor and a bearing. One end of the rotor extends into the vacuum tube shell through the first through-hole and is rotatable relative to the vacuum tube shell. The bearing is located outside the vacuum tube shell and includes a bearing housing and a bearing body. One end of the bearing housing is open, and the bearing body is installed inside the bearing housing through the open end. The bearing body is fitted onto the outer periphery of the rotor, and the open end is sealed to the outer wall of the vacuum tube shell, covering the first through-hole. The dynamic seal is sandwiched between the outer peripheral wall of the rotor and the inner peripheral wall of the bearing housing, and is located on the side of the bearing body closer to the vacuum tube shell. This X-ray tube assembly facilitates heat dissipation and lubrication of the bearing body, reduces costs, and improves the lifespan of the bearing body.

Description

Technical Field

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

[0002] In X-ray tube assemblies of related technologies, bearings are typically mounted on the outer periphery of the rotor to ensure smooth rotation of the rotor relative to the vacuum tube shell. In a vacuum environment, the bearings have limited heat dissipation capacity, leading to increased operating temperature, shortened bearing life, and difficulty in lubrication. Although some X-ray tube assemblies use liquid metal bearings to improve heat dissipation and lifespan, liquid metal bearings are expensive.

[0003] Therefore, there is an urgent need for an X-ray tube assembly to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an X-ray tube assembly that facilitates heat dissipation and lubrication of the bearing body, reduces costs, and increases the lifespan of the bearing body.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An X-ray tube assembly, comprising:

[0007] A vacuum tube shell, wherein the vacuum tube shell is provided with a first through hole;

[0008] An anode assembly includes a rotor and a bearing. One end of the rotor extends into the vacuum tube housing through the first through hole and is rotatable relative to the vacuum tube housing. The bearing is located outside the vacuum tube housing and includes a bearing seat and a bearing body. One end of the bearing seat is an open end. The bearing body is installed inside the bearing seat through the open end and is fitted around the outer periphery of the rotor. The open end is sealed to the outer wall of the vacuum tube housing and covers the first through hole.

[0009] A dynamic seal is sandwiched between the outer peripheral wall of the rotor and the inner peripheral wall of the bearing housing, and the dynamic seal is located on the side of the bearing body closer to the vacuum tube shell.

[0010] As an optional embodiment, the rotor component is hollow inside, and both ends of the rotor component are sealed. The hollow interior of the rotor component forms a liquid inlet cooling channel. A first liquid inlet communicating with the liquid inlet cooling channel is provided on the outer peripheral wall of the rotor component. An annular liquid outlet channel communicating with the liquid inlet cooling channel is provided inside the rotor component. The annular liquid outlet channel extends along the extension direction of the rotor component and surrounds the outer periphery of the liquid inlet cooling channel. A first liquid outlet communicating with the annular liquid outlet channel is provided on the outer peripheral wall of the rotor component. Both the first liquid inlet and the first liquid outlet are located on the side of the dynamic seal that is away from the vacuum tube shell.

[0011] As an optional solution, the rotor component has a first liquid outlet on the outer peripheral wall of the bearing body sleeve, and the first liquid inlet is located on the side of the bearing body away from the vacuum tube shell.

[0012] As an optional embodiment, the X-ray tube assembly further includes a housing, which is fixedly fitted around the outer periphery of the bearing housing and the vacuum tube shell. A cooling cavity is formed between the outer walls of the bearing housing and the vacuum tube shell and the inner wall of the housing. A second liquid outlet is provided on the outer wall of the bearing housing, which connects the cooling cavity and the first liquid outlet. A third liquid outlet is provided on the shell wall of the housing, which communicates with the cooling cavity. A second liquid inlet is also provided on the shell wall of the housing, which communicates with the first liquid inlet.

[0013] As an optional solution, the X-ray tube assembly further includes:

[0014] A circulating pump, the inlet of which is connected to the third outlet;

[0015] The radiator has its inlet connected to the outlet of the circulating pump and its outlet connected to the second liquid inlet.

[0016] As an optional feature, the anode assembly further includes:

[0017] An anode target disk is located inside the vacuum tube shell. The anode target disk is fixedly connected to one end of the rotor that extends into the vacuum tube shell. A plurality of first heat dissipation protrusions are provided at intervals on the back side of the anode target disk.

[0018] As an optional solution, a heat dissipation groove is formed between two adjacent first heat dissipation protrusions, and a plurality of second heat dissipation protrusions are provided at intervals on the inner wall of the vacuum tube shell. The plurality of second heat dissipation protrusions correspond one-to-one with the plurality of heat dissipation grooves, and the second heat dissipation protrusions extend into the corresponding heat dissipation grooves.

[0019] As an optional solution, the outer wall of the vacuum tube shell is provided with multiple third heat dissipation protrusions at intervals.

[0020] As an optional solution, the dynamic seal is a magnetohydrodynamic seal.

[0021] As an optional embodiment, the anode assembly further includes an anode drive unit located outside the vacuum tube housing. The anode drive unit is driveably connected to the rotor assembly and is configured to drive the rotor assembly to rotate.

[0022] The beneficial effects of this invention are:

[0023] This invention provides an X-ray tube assembly, which includes a vacuum tube shell, an anode assembly, and a dynamic seal. The vacuum tube shell has a first through hole. The anode assembly includes a rotor and a bearing. One end of the rotor extends into the vacuum tube shell through the first through hole and is rotatable relative to the vacuum tube shell. The bearing is located outside the vacuum tube shell and includes a bearing housing and a bearing body. One end of the bearing housing is an open end. The bearing body is installed inside the bearing housing through the open end and is fitted onto the outer periphery of the rotor. The open end is sealed to the outer wall of the vacuum tube shell and covers the first through hole. The dynamic seal is sandwiched between the outer peripheral wall of the rotor and the inner peripheral wall of the bearing housing, and is located on the side of the bearing body closer to the vacuum tube shell. This X-ray tube assembly, by incorporating dynamic seals, ensures normal rotation of the rotor and airtightness of the vacuum tube shell while placing the bearing body outside the vacuum tube shell. This allows the bearing body to operate in a non-vacuum environment, facilitating heat dissipation and lubrication, thus extending its lifespan. Furthermore, it eliminates the need for a liquid metal bearing design, allowing the use of ordinary roller bearings, which significantly reduces costs. Attached Figure Description

[0024] Figure 1 This is a structural cross-sectional view of the X-ray tube assembly provided in an embodiment of the present invention;

[0025] Figure 2 This is a partial structural cross-sectional view of the X-ray tube assembly provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Vacuum tube shell; 11. First through hole; 12. Second heat dissipation protrusion; 13. Third heat dissipation protrusion; 2. Anode assembly; 21. Rotor component; 211. Liquid inlet cooling channel; 212. First liquid inlet; 213. Annular liquid outlet channel; 214. First liquid outlet; 22. Bearing component; 221. Bearing seat; 2211. Second liquid outlet; 2212. Second through hole; 222. Bearing body; 23. Anode target plate; 231. First heat dissipation protrusion; 232. Heat dissipation groove; 24. Anode drive component; 3. Dynamic seal component; 4. Outer shell; 41. Third liquid outlet; 42. Second liquid inlet; 5. Circulation pump; 6. Radiator; 7. Cathode assembly; 8. Cooling chamber. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, 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 or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or 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 invention according to the specific circumstances.

[0030] In the description of this invention, unless otherwise expressly 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 being 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 being 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.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 and Figure 2As shown, this embodiment provides an X-ray tube assembly, which includes a vacuum tube shell 1, an anode assembly 2, and a cathode assembly 7. The anode assembly 2 includes a rotor 21, an anode drive 24, and an anode target disk 23. The cathode assembly 7 is fixedly disposed inside the vacuum tube shell 1, and the anode target disk 23 is also located inside the vacuum tube shell 1. The vacuum tube shell 1 is used to provide a vacuum environment to reduce the resistance to electron movement. The vacuum tube shell 1 has a first through hole 11. One end of the rotor 21, which passes through the first through hole 11 and extends into the vacuum tube shell 1, is fixedly connected to the anode target disk 23. The electron beam impact point of the cathode assembly 7 and the anode target disk 23 corresponds to each other. The anode drive 24 is drivenly connected to the rotor 21. The anode drive 24 is configured to drive the rotor 21 to rotate, so that the rotor 21 synchronously drives the anode target disk 23 to rotate. In the above configuration, when the anode drive 24 drives the rotor 21 to rotate at high speed, causing the rotor 21 to synchronously drive the anode target disk 23 to rotate at high speed, the electron beam emitted by the cathode assembly 7 is accelerated towards the anode target disk 23 under the influence of the electric field between the anode assembly 2 and the cathode assembly 7, thereby bombarding the electron beam impact point of the anode target disk 23 and generating X-rays. The generated X-rays are then emitted through the X-ray window on the vacuum tube shell 1. By making the anode target disk 23 rotate at high speed, the instantaneous thermal power during electron beam bombardment can be reduced, avoiding target surface ablation of the anode target disk 23 and improving the lifespan of the anode target disk 23. In addition, by aligning the cathode assembly 7 with the electron beam impact point of the anode target disk 23, the electron beam emitted by the cathode assembly 7 does not deflect, overcoming the power limitation problem of the X-ray tube assembly caused by the electron beam intensity limitation and improving the power of the X-ray tube assembly.

[0033] Optionally, in this embodiment, the internal cathode filament of the cathode assembly 7 can emit an electron beam after being heated by electricity. Optionally, in this embodiment, both the vacuum tube shell 1 and the rotor component 21 are grounded.

[0034] Optionally, in this embodiment, the anode drive 24 is located outside the vacuum tube shell 1 to prevent the heat generated by the anode drive 24 during operation from being transferred into the vacuum tube shell 1, thereby reducing the heat inside the vacuum tube shell 1 and avoiding heating of the anode target plate 23. Optionally, the anode drive 24 can be an asynchronous motor, a servo motor, or a pneumatic motor, etc., and this embodiment does not limit the specific form of the anode drive 24.

[0035] In X-ray tube assemblies of related technologies, bearings are typically mounted on the outer periphery of the rotor to ensure smooth rotation of the rotor relative to the vacuum tube shell. In a vacuum environment, the bearings have limited heat dissipation capacity, leading to increased operating temperature, shortened bearing life, and difficulty in lubrication. Although some X-ray tube assemblies use liquid metal bearings to improve heat dissipation and lifespan, liquid metal bearings are expensive.

[0036] To solve the above problems, such as Figure 1 and Figure 2 As shown, the X-ray tube assembly provided in this embodiment also includes a dynamic seal 3, and the anode assembly 2 also includes a bearing 22. The bearing 22 includes a bearing housing 221 and a bearing body 222. One end of the bearing housing 221 is an open end, and the bearing body 222 is installed inside the bearing housing 221 through the open end. The bearing body 222 is sleeved on the outer periphery of the rotor 21, and the open end is sealed to the outer wall of the vacuum tube shell 1. The open end is also covered by the first through hole 11. The dynamic seal 3 is sandwiched between the outer peripheral wall of the rotor 21 and the inner peripheral wall of the bearing housing 221, and the dynamic seal 3 is located on the side of the bearing body 222 closer to the vacuum tube shell 1. By setting the bearing 22, the smooth rotation of the rotor 21 relative to the vacuum tube shell 1 within the vacuum tube shell 1 is ensured. Furthermore, by setting a dynamic seal 3, the X-ray tube assembly ensures the normal rotation of the rotor 21 and the airtightness of the vacuum tube shell 1, while placing the bearing body 222 outside the vacuum tube shell 1. This allows the bearing body 222 to be in a non-vacuum environment, making it easier to dissipate heat and lubricate the bearing body 222, thus improving the lifespan of the bearing body 222. It also eliminates the need to design the bearing body 222 as a liquid metal bearing; a regular roller bearing can be used, greatly reducing costs.

[0037] It should be noted that in this embodiment, the open end is welded to the outer wall of the vacuum tube shell 1 to ensure the airtightness of the connection. In other embodiments, the open end can also be connected to the outer wall of the vacuum tube shell 1 by bonding or other means.

[0038] It should be noted that, in this embodiment, a second through hole 2212 is provided at the end of the bearing housing 221 away from the opening end. One end of the rotor component 21 passes through the second through hole 2212 in sequence, and the bearing body 222, dynamic seal 3, opening end and first through hole 11 extend into the vacuum tube shell 1.

[0039] Optionally, in this embodiment, the dynamic seal 3 is a magnetohydrodynamic seal. This configuration, while ensuring the normal rotation of the rotor 21, effectively improves the sealing effect on the vacuum housing 1, ensuring that the vacuum inside the vacuum housing 1 is maintained at 10... -7 Below Pa. In other embodiments, the dynamic seal 3 can also be in other forms, as long as the dynamic seal 3 is a rotary dynamic seal.

[0040] Optionally, such as Figure 1As shown, a plurality of first heat dissipation protrusions 231 are provided at intervals on the back side of the anode target disk 23 (i.e., the side of the anode target disk 23 facing away from the electron beam impact point). The above arrangement increases the radiation heat dissipation area of ​​the anode target disk 23 and improves the heat dissipation efficiency of the anode target disk 23, thereby reducing the mass of the anode target disk 23, thereby reducing the load on the bearing body 222 and further improving the life of the bearing body 222.

[0041] Optionally, such as Figure 1 As shown, a heat dissipation groove 232 is formed between two adjacent first heat dissipation protrusions 231. Multiple second heat dissipation protrusions 12 are spaced apart on the inner wall of the vacuum tube shell 1, with each second heat dissipation protrusion 12 corresponding to a heat dissipation groove 232. The second heat dissipation protrusions 12 extend into their respective heat dissipation grooves 232. This arrangement facilitates the anode target plate 23 in transferring heat to the shell wall of the vacuum tube shell 1, thereby dissipating heat outward through the shell wall of the vacuum tube shell 1 and improving the heat dissipation efficiency of the anode target plate 23.

[0042] Optionally, such as Figure 1 As shown, the outer wall of the vacuum tube shell 1 is provided with multiple third heat dissipation protrusions 13 at intervals. This arrangement facilitates the dissipation of heat from the shell wall of the vacuum tube shell 1. Optionally, the second heat dissipation protrusion 12 and the third heat dissipation protrusion 13 are located on opposite sides of the shell wall of the vacuum tube shell 1, which further facilitates the transfer of heat from the anode target plate 23 to the third heat dissipation protrusion 13, thereby improving the heat dissipation efficiency of the anode target plate 23.

[0043] Optionally, in this embodiment, the first heat dissipation protrusion 231, the second heat dissipation protrusion 12, and the third heat dissipation protrusion 13 are all in the form of annular fins, and each annular fin is coaxially arranged around the axis of the rotor component 21. In other embodiments, the specific form and arrangement of the first heat dissipation protrusion 231, the second heat dissipation protrusion 12, and the third heat dissipation protrusion 13 can be set according to requirements.

[0044] Optionally, in this embodiment, as Figure 1 and Figure 2As shown, the rotor component 21 has a hollow interior, with both ends sealed. The hollow interior forms a liquid inlet cooling channel 211. A first liquid inlet 212 communicating with the liquid inlet cooling channel 211 is provided on the outer peripheral wall of the rotor component 21. An annular liquid outlet channel 213 communicating with the liquid inlet cooling channel 211 is provided inside the rotor component 21. The annular liquid outlet channel 213 extends along the extension direction of the rotor component 21 and surrounds the outer periphery of the liquid inlet cooling channel 211. A first liquid outlet 214 communicating with the annular liquid outlet channel 213 is provided on the outer peripheral wall of the rotor component 21. Both the first liquid inlet 212 and the first liquid outlet 214 are located on the side of the dynamic seal 3 away from the vacuum tube shell 1. By designing the rotor component 21 as a hollow structure, the heat transfer performance of the rotor component 21 is reduced, thereby reducing the heat flowing from the anode target disk 23 to the bearing body 222 through the rotor component 21, facilitating heat dissipation from the bearing body 222, and ensuring the lifespan of the bearing body 222. Furthermore, the structural design of the rotor component 21 allows cooling medium to be introduced into it through the first inlet 212. The cooling medium enters the inlet cooling channel 211 through the first inlet 212, then flows into the annular outlet channel 213, and finally exits through the first outlet 214 on the rotor component 21. This allows the cooling medium to sequentially dissipate heat from the rotor component 21, the dynamic seal 3, and the bearing body 222, improving the heat dissipation effect on these components, reducing their temperatures, ensuring the dynamic sealing effect of the dynamic seal 3, and extending the lifespan of the bearing body 222. Additionally, since both the first inlet 212 and the first outlet 214 are located on the side of the dynamic seal 3 furthest from the vacuum tube shell 1, the dynamic seal 3 effectively seals the cooling medium flowing through the rotor component 21, preventing it from entering the vacuum tube shell 1 and improving the airtightness of the vacuum tube shell 1. Furthermore, it should be noted that by improving the heat dissipation capacity of the rotor component 21 and the bearing body 222, the mass of the anode target disk 23 can be reduced, thereby reducing the load on the bearing body 222 and increasing its service life. Optionally, in this embodiment, the cooling medium is cooling oil, which not only ensures the cooling effect but also lubricates the bearing body 222.

[0045] Optionally, such as Figure 2 As shown, a first liquid outlet 214 is provided on the outer peripheral wall of the rotor component 21, where the bearing body 222 is fitted, and a first liquid inlet 212 is located on the side of the bearing body 222 away from the vacuum tube shell 1. This arrangement allows the cooling medium flowing out through the first liquid outlet 214 to better dissipate heat and lubricate the inner and outer rings of the bearing body 222, thus improving the heat dissipation effect of the bearing body 222.

[0046] Optionally, such as Figure 1 and Figure 2 As shown, the X-ray tube assembly also includes a housing 4, which is fixedly fitted around the bearing housing 221 and the vacuum tube housing 1. A cooling cavity 8 is formed between the outer walls of the bearing housing 221 and the vacuum tube housing 1 and the inner wall of the housing 4. A second liquid outlet 2211 is provided on the outer wall of the bearing housing 221, which connects the cooling cavity 8 and the first liquid outlet 214. A third liquid outlet 41 communicating with the cooling cavity 8 is provided on the shell wall of the housing 4, and a second liquid inlet 42 communicating with the first liquid inlet 212 is also provided on the shell wall of the housing 4. By providing the housing 4, the entire X-ray tube assembly is provided with support and protection, and the housing 4 can also serve as a container for holding the cooling medium. Furthermore, the above configuration allows cooling medium to be introduced into the first inlet 212 through the second inlet 42, and the cooling medium discharged through the first outlet 214 enters the bearing housing 221 and then enters the cooling chamber 8 through the second outlet 2211 on the bearing housing 221, thereby dissipating heat from the outer wall of the bearing housing 221 and the outer wall of the vacuum tube shell 1. Finally, it is discharged through the third outlet 41 on the outer shell 4, further ensuring the heat dissipation effect. It should be noted that the third heat dissipation protrusion 13 is located inside the cooling chamber 8, which improves the convective heat transfer capacity between the vacuum tube shell 1 and the cooling medium, facilitating heat exchange between the third heat dissipation protrusion 13 and the cooling medium in the cooling chamber 8, ensuring the heat dissipation effect inside the vacuum tube shell 1. It should be noted that in this embodiment, the outer shell 4 is grounded. Optionally, the anode drive 24 is located outside the outer shell 4, thereby preventing the cooling medium from entering the anode drive 24, and the end of the rotor 21 away from the vacuum tube shell 1 extends out of the outer shell 4 and is connected to the anode drive 24 for transmission.

[0047] In this embodiment, as Figure 1 As shown, the X-ray tube assembly also includes a circulating pump 5 and a radiator 6. The inlet of the circulating pump 5 is connected to the third liquid outlet 41, the inlet of the radiator 6 is connected to the outlet of the circulating pump 5, and the outlet of the radiator 6 is connected to the second liquid inlet 42. This arrangement allows the cooling medium discharged through the third liquid outlet 41, driven by the circulating pump 5, to exchange heat with the radiator 6 and then be recirculated into the second liquid inlet 42 for liquid cooling of the rotor 21, dynamic seal 3, bearing 22, and vacuum tube shell 1. The heated cooling medium is then discharged through the third liquid outlet 41 and re-enters the radiator 6 for heat exchange. This cycle repeats, achieving cyclical heat dissipation for the rotor 21, dynamic seal 3, bearing 22, and vacuum tube shell 1, thus improving the heat dissipation effect. In addition, by connecting the outlet of the radiator 6 with the second liquid inlet 42, the cooling medium after heat exchange first enters the second liquid inlet 42, thereby dissipating heat on the bearing body 222 and the rotor 21, effectively ensuring the heat dissipation effect on the bearing body 222 and ensuring the life of the bearing body 222.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An X-ray tube assembly, characterized in that, include: Vacuum tube shell (1), wherein the vacuum tube shell (1) is provided with a first through hole (11); The anode assembly (2) includes a rotor (21) and a bearing (22). One end of the rotor (21) extends into the vacuum tube shell (1) through the first through hole (11) and is rotatable relative to the vacuum tube shell (1). The bearing (22) is located outside the vacuum tube shell (1). The bearing (22) includes a bearing seat (221) and a bearing body (222). One end of the bearing seat (221) is an open end. The bearing body (222) is installed inside the bearing seat (221) through the open end. The bearing body (222) is sleeved on the outer periphery of the rotor (21). The open end is sealed to the outer wall of the vacuum tube shell (1) and covers the first through hole (11). Dynamic seal (3), which is sandwiched between the outer peripheral wall of the rotor (21) and the inner peripheral wall of the bearing housing (221), and the dynamic seal (3) is located on the side of the bearing body (222) near the vacuum tube shell (1); The rotor (21) is hollow inside, and both ends of the rotor (21) are sealed. The hollow interior of the rotor (21) forms a liquid inlet cooling channel (211). A first liquid inlet (212) communicating with the liquid inlet cooling channel (211) is provided on the outer peripheral wall of the rotor (21). An annular liquid outlet channel (213) communicating with the liquid inlet cooling channel (211) is provided inside the rotor (21). The annular liquid outlet channel (213) extends along the extension direction of the rotor (21) and surrounds the outer periphery of the liquid inlet cooling channel (211). A first liquid outlet (214) communicating with the annular liquid outlet channel (213) is provided on the outer peripheral wall of the rotor (21). The first liquid inlet (212) and the first liquid outlet (214) are both located on the side of the dynamic seal (3) away from the vacuum tube shell (1).

2. The X-ray tube assembly according to claim 1, characterized in that, The rotor component (21) has a first liquid outlet (214) on the outer peripheral wall of the bearing body (222) sleeved thereon, and the first liquid inlet (212) is located on the side of the bearing body (222) away from the vacuum tube shell (1).

3. The X-ray tube assembly according to claim 1 or 2, characterized in that, The X-ray tube assembly also includes a housing (4), which is fixedly sleeved on the outer periphery of the bearing seat (221) and the vacuum tube shell (1). A cooling cavity (8) is formed between the outer walls of the bearing seat (221) and the vacuum tube shell (1) and the inner wall of the housing (4). A second liquid outlet (2211) is provided on the outer wall of the bearing seat (221), which connects the cooling cavity (8) and the first liquid outlet (214). A third liquid outlet (41) is provided on the shell wall of the housing (4) and communicates with the cooling cavity (8). A second liquid inlet (42) is also provided on the shell wall of the housing (4) and communicates with the first liquid inlet (212).

4. The X-ray tube assembly according to claim 3, characterized in that, The X-ray tube assembly also includes: A circulating pump (5) is connected to the third outlet (41) through its inlet. The radiator (6) has its inlet connected to the outlet of the circulating pump (5) and its outlet connected to the second liquid inlet (42).

5. The X-ray tube assembly according to claim 1 or 2, characterized in that, The anode assembly (2) also includes: Anode target disk (23) is located inside the vacuum tube shell (1). The anode target disk (23) is fixedly connected to one end of the rotor component (21) that extends into the vacuum tube shell (1). A plurality of first heat dissipation protrusions (231) are provided at intervals on the back side of the anode target disk (23).

6. The X-ray tube assembly according to claim 5, characterized in that, A heat dissipation groove (232) is formed between two adjacent first heat dissipation protrusions (231). A plurality of second heat dissipation protrusions (12) are provided at intervals on the inner wall of the vacuum tube shell (1). The plurality of second heat dissipation protrusions (12) correspond one-to-one with the plurality of heat dissipation grooves (232). The second heat dissipation protrusions (12) extend into the corresponding heat dissipation grooves (232).

7. The X-ray tube assembly according to claim 6, characterized in that, The outer wall of the vacuum tube shell (1) is provided with a plurality of third heat dissipation protrusions (13) at intervals.

8. The X-ray tube assembly according to claim 1 or 2, characterized in that, The dynamic seal (3) is a magnetohydrodynamic seal.

9. The X-ray tube assembly according to claim 1 or 2, characterized in that, The anode assembly (2) further includes an anode drive (24) located outside the vacuum tube shell (1), the anode drive (24) being connected to the rotor (21) in a transmission manner, and the anode drive (24) being configured to drive the rotor (21) to rotate.

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