Anode direct-cooled rotating anode x-ray tube

Abstract

The utility model belongs to X -ray tube technical field especially relates to an anode direct -cooling type rotating anode X -ray tube. Include: rotating anode subassembly, rotating support subassembly, tube shell and panel cathode subassembly, panel cathode subassembly installs in the tube shell, and rotating support subassembly is fixed in one end of the tube shell, rotating anode subassembly is installed in rotating support subassembly, and the target surface of rotating anode subassembly is located in the tube shell, and rotating anode subassembly and rotating support subassembly leave the gap between, and the gap is filled with lubricating sealing medium, and rotating anode subassembly can rotate in rotating support subassembly, and the cathode in panel cathode subassembly is towards the target surface of rotating anode subassembly, and the back of rotating anode subassembly is provided with cooling liquid contact groove, and cooling liquid contact groove contacts with cooling liquid. The utility model has very high heat dissipation efficiency, can realize the continuous loading capacity of dozens of kilowatt, and is easy to realize the focusing and control of electron beam flow, has good cathode emission performance.

Description

Technical Field

[0001] This utility model belongs to the field of X-ray tube technology, and particularly relates to an anode direct-cooling rotating anode X-ray tube. Background Technology

[0002] In existing technologies, high-speed, large-diameter metal-graphite composite target disks have become the mainstream for rotating anode X-ray tubes. However, the rotating anode X-ray tube still relies on bearing support, and its heat dissipation depends on radiation heat transfer to the tube shell followed by intermittent cooling. This results in bottlenecks such as bearing wear (life typically <500,000 start-stop cycles) and limited heat capacity (≤8 MHU), with frequent thermal protection shutdowns severely restricting continuous scanning capabilities. Although the emergence of liquid metal bearing technology has slightly improved the heat dissipation capacity of rotating anode X-ray tubes, radiation heat dissipation remains the primary cooling method and limits the continuous scanning capability of X-ray tubes.

[0003] Patents CN201210096224 and US6084942 propose a rotating shell X-ray tube where the entire shell, anode, and cathode are integrated and rotate. The electron beam is focused and deflected by a quadrupole magnet and a diamagnetic magnet, enabling direct oil cooling of the anode target and achieving continuous loading of tens of kilowatts. However, in patent CN201210096224, to achieve direct anode cooling, the cathode rotates with the shell, making it impossible to place the cathode directly below the anode target. This necessitates a complex magnetic focusing technique to deflect the electron beam, which presents challenges to focusing effectiveness and cathode emission performance. Furthermore, the complex magnetic focusing technology leads to severe focal point distortion and unresolved cathode emission performance issues. Summary of the Invention

[0004] This invention provides an anode-direct-cooled rotating anode X-ray tube, which has extremely high heat dissipation efficiency, can achieve continuous loading capacity of tens of kilowatts, and is easy to focus and control the electron beam, and has good cathode emission performance, thereby solving the technical problems existing in the background art.

[0005] The technical solution of this utility model is as follows: A direct-cooling rotating anode X-ray tube includes: a rotating anode assembly, a rotating support assembly, a tube shell, and a flat cathode assembly. The flat cathode assembly is installed inside the tube shell, and the rotating support assembly is fixed to one end of the tube shell. The rotating anode assembly is installed in the rotating support assembly, and the target surface of the rotating anode assembly is located inside the tube shell; A gap is left between the rotating anode assembly and the rotating support assembly, and the gap is filled with a lubricating and sealing medium. The rotating anode assembly can rotate in the rotating support assembly. The cathode in the flat cathode assembly faces the target surface of the rotating anode assembly. A coolant contact groove is provided on the back of the rotating anode assembly, and the coolant contact groove is in contact with the coolant.

[0006] Furthermore, the flat cathode assembly includes a cathode, a cathode mounting plate, and an insulating support.

[0007] The other end of the tube shell is equipped with the tube shell bottom plate, the insulating support is placed inside the tube shell, the bottom end of the insulating support is connected to the tube shell bottom plate, the top end of the insulating support is connected to the cathode mounting plate, and the cathode is mounted on the cathode mounting plate.

[0008] Furthermore, the cathode mounting plate includes a core sleeve and a cathode plate, the core sleeve being sleeved on the top end of the insulating support, the cathode plate being fixed to the top end of the core sleeve, and the cathode being mounted on the cathode plate.

[0009] Furthermore, a shielding ring is fitted onto the column sleeve.

[0010] Furthermore, the rotating support assembly includes a ring and a limiting ring, the limiting ring being disposed at one end of the tube shell, the bottom end of the ring sleeve being connected to the limiting ring, and a convex ring structure being disposed on the side of the rotating anode assembly between the ring sleeve and the limiting ring.

[0011] Furthermore, the surface of the convex ring structure is a grooved surface, and the side surfaces of the rotating anode assembly located above and below the convex ring structure are coated surfaces.

[0012] Furthermore, herringbone grooves are etched on the grooved surface.

[0013] Furthermore, the rotating support assembly includes a ring sleeve and a limiting ring. The ring sleeve is disposed at one end of the tube shell, and an annular structure is provided in the middle of the ring sleeve. A groove structure is provided on the side of the rotating anode assembly, and the annular structure is placed in the groove structure. The limiting ring is disposed at the other end of the ring sleeve and connected to the top end of the groove structure.

[0014] Furthermore, the cross-section of the insulating support is trapezoidal.

[0015] The beneficial effects of this utility model are as follows: This utility model has a fixed tube shell and cathode, as well as an anode that can contact the coolant and rotate continuously. Therefore, this utility model has excellent continuous heat dissipation performance of the anode, can achieve a continuous loading efficiency of tens of kilowatts, has excellent cathode emission characteristics, and can achieve both small focal spot and large tube current.

[0016] The anode of this invention works in conjunction with the rotating and fixing assembly of the X-ray tube to achieve anode rotation, solving the problem of ball bearing wear in traditional X-ray tubes and resulting in better lifespan and operational stability. At the same time, the X-ray tube has good load-bearing capacity and can withstand extremely high centrifugal forces.

[0017] This invention has extremely high heat dissipation efficiency, can achieve continuous loading capacity of tens of kilowatts, and is easy to focus and control the electron beam, and has good cathode emission performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the rotating anode and rotating support assembly in this utility model.

[0020] Figure 3 This is a schematic diagram of one embodiment of the rotating anode of this utility model.

[0021] Figure 4 This is a schematic diagram of another embodiment of the rotating anode of this utility model.

[0022] Figure 5 This is a schematic diagram of the grooved surface in this utility model.

[0023] Figure 6 This is a schematic diagram of the cathode installation in this utility model.

[0024] Figure 7 This is a schematic diagram of the structure of the tube shell in this utility model. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] In the technical solution of this utility model, Figure 1This is a structural schematic diagram provided based on the specific structure of a direct-cooling rotating anode X-ray tube according to a utility model, as shown below. Figure 1 As shown, this utility model includes: The rotating anode assembly 1, the rotating support assembly, the tube shell 6, and the flat cathode assembly are provided. The flat cathode assembly is installed inside the tube shell 6, and the rotating support assembly is fixed to one end of the tube shell 6. The rotating anode assembly 1 is installed in the rotating support assembly, and the target surface 1001 of the rotating anode assembly 1 is located inside the shell 6.

[0027] A gap 400 is left between the rotating anode assembly 1 and the rotating support assembly. The gap 400 is filled with a lubricating and sealing medium. The rotating anode assembly 1 can rotate in the rotating support assembly. The cathode 11 in the flat cathode assembly faces the target surface 1001 of the rotating anode assembly 1. A coolant contact groove 1002 is provided on the back of the rotating anode assembly 1. The coolant contact groove 1002 is in contact with the coolant.

[0028] The cathode 11 is placed directly below the target surface 1001. This structure is beneficial for electron beam focusing and cathode emission. The electrons emitted by the cathode can be directly attracted by the anode target surface.

[0029] The rotating anode assembly includes an anode 100 and mounting plates disposed on both sides of the back of the anode 100. A coolant contact groove 1002 is formed between the back of the anode 100 and the two mounting plates, allowing the coolant to directly contact the anode and thus achieve heat dissipation.

[0030] like Figure 2 and Figure 3 As shown, in one embodiment of this utility model, the rotating support assembly includes: a ring sleeve 2 and a limiting ring 3. The limiting ring 3 is disposed at one end of the tube shell 6, and the bottom end of the ring sleeve 2 is connected to the limiting ring 3. A convex ring structure 500 is provided on the side of the rotating anode assembly 1, and the convex ring structure 500 is disposed between the ring sleeve 2 and the limiting ring 3. The ring sleeve 2 and the limiting ring 3 form an annular groove structure, and the convex ring structure 500 is a circular ring structure protruding towards the rotating support assembly. The groove structure is adapted to the rotating structure 500.

[0031] During assembly, the anode 100 is placed inside the ring 2 and connected to the ring 2 using a limiting ring 3. This connection can be made by welding or bolt tightening, thus fixing the anode 100 between the limiting ring 3 and the ring 2. A small gap 400 is left between the anode 100 and the limiting ring 3 and the ring 2 to ensure that the anode 100 can rotate relative to the ring 2. The gap 400 should be filled with a lubricating and sealing medium to ensure airtightness during sliding friction. An example of a lubricating and sealing medium is a liquid metal alloy with a gallium-indium-tin composition. Figure 3 This is a schematic diagram of a rotating anode structure.

[0032] In one embodiment of this utility model, the surface of the convex ring structure 500 is a grooved surface 4001, and the side surfaces of the rotating anode assembly 1 located above and below the convex ring structure 500 are coated surfaces 4002 and 4003. Herringbone grooves are etched on the grooved surface 4001, specifically as follows... Figure 5 As shown.

[0033] In this invention, 4001, 4002, and 4003 are surfaces that will undergo relative rotational motion. The grooved surface 4001 is created using a grooving process, for example... Figure 4 The herringbone groove shown is designed to ensure the lubrication and support effect of the liquid metal during rotation. The coating surface 4002 should be coated with a coating to repel the inflow of coolant, such as a polytetrafluoroethylene coating, and to repel insulating oil. The coating surface 4003 should be coated with a coating to repel the outflow of filler in the gap, such as an alumina coating.

[0034] 1001 is the target surface of the rotating anode assembly. The coolant contact tank 1002 can directly contact the coolant, such as insulating oil. During operation, the heat on the target surface 1001 is quickly transferred to the insulating oil through heat conduction and heat convection, thereby ensuring that the anode can work continuously for a long time with extremely high loading power.

[0035] In one embodiment of this utility model, the rotating support assembly includes a ring sleeve 2 and a limiting ring 3. The ring sleeve 2 is disposed at one end of the tube shell 6, and an annular structure 600 is provided in the middle of the ring sleeve 2. A groove structure 700 is provided on the side of the rotating anode assembly 1, and the annular structure 200 is placed in the groove structure 700. The limiting ring 3 is disposed at the other end of the ring sleeve 2 and connected to the top end of the groove structure 700. The ring sleeve 200 has a protruding annular structure 600 on its side, which is disposed between the limiting ring 3 and the groove structure 700.

[0036] During assembly, the anode 100 is placed at one end of the ring 200, and the limiting ring 3 is placed at the other end of the ring 200. The limiting ring is connected to the top of the groove structure 700 so that the limiting ring is connected to the anode. The connection can be made by welding or bolt tightening, thereby fixing the ring 200 between the limiting ring 3 and the anode 100. During operation, the ring 200 is fixed to the tube shell, while the anode 100 and the limiting ring 3 rotate.

[0037] In this embodiment, the surface of the groove structure 700 and the lower surface of the limiting ring are grooved surfaces 4001, the side surface of the limiting ring is a coated surface, and the side surface of the rotating anode assembly 1 located below the groove structure 700 is a coated surface.

[0038] In one embodiment of this utility model, such as Figure 6 As shown, the flat cathode assembly includes a cathode 11, a cathode mounting plate, and an insulating support 9; The other end of the tube shell 6 is fitted with the tube shell bottom plate 10. The insulating support member 9 is placed inside the tube shell 6. The bottom end of the insulating support member 9 is connected to the tube shell bottom plate 10, and the top end of the insulating support member 9 is connected to the cathode mounting plate. The cathode 11 is mounted on the cathode mounting plate. The tube shell structure is as follows. Figure 7 As shown: the top of the shell 6 is connected to the anode, and the bottom plate 10 of the shell is connected to the cathode. The shell structure serves as a connection support and a vacuum seal.

[0039] The cathode mounting plate includes a core sleeve 7 and a cathode plate 5. The core sleeve 7 is sleeved on the top end of the insulating support 9, the cathode plate 5 is fixed to the top end of the core sleeve 7, and the cathode 11 is mounted on the cathode plate 5.

[0040] The cathode 11 is directly opposite the target surface 1001 of the rotating anode assembly. The cathode 11 is placed on the cathode plate 5, and the cathode plate 5 is connected to the top of the insulating support 9 through the core sleeve 7.

[0041] A shielding ring 8 is fitted onto the column sleeve 7. The shielding ring 8 is installed above the insulating support 9 to optimize the high-voltage stability of the X-ray tube.

[0042] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A direct-cooling rotating anode X-ray tube, characterized in that, include: A rotating anode assembly (1), a rotating support assembly, a tube shell (6), and a flat cathode assembly, wherein the flat cathode assembly is installed inside the tube shell (6), and the rotating support assembly is fixed to one end of the tube shell (6); The rotating anode assembly (1) is installed in the rotating support assembly, and the target surface (1001) of the rotating anode assembly (1) is located inside the shell (6); A gap (400) is left between the rotating anode assembly (1) and the rotating support assembly. The gap (400) is filled with a lubricating sealing medium. The rotating anode assembly (1) can rotate in the rotating support assembly. The cathode (11) in the flat cathode assembly faces the target surface (1001) of the rotating anode assembly (1). A coolant contact groove (1002) is provided on the back of the rotating anode assembly (1). The coolant contact groove (1002) is in contact with the coolant.

2. The anode-direct-cooled rotating anode X-ray tube as described in claim 1, characterized in that, The flat cathode assembly includes a cathode (11), a cathode mounting plate, and an insulating support (9). The other end of the tube shell (6) is fitted with a tube shell bottom plate (10), the insulating support (9) is placed inside the tube shell (6), the bottom end of the insulating support (9) is connected to the tube shell bottom plate (10), the top end of the insulating support (9) is connected to the cathode mounting plate, and the cathode (11) is mounted on the cathode mounting plate.

3. The anode-direct-cooled rotating anode X-ray tube as described in claim 2, characterized in that, The cathode mounting plate includes a core sleeve (7) and a cathode plate (5). The core sleeve (7) is sleeved on the top of the insulating support (9). The cathode plate (5) is fixed on the top of the core sleeve (7). The cathode (11) is mounted on the cathode plate (5).

4. The anode-direct-cooled rotating anode X-ray tube as described in claim 3, characterized in that, A shielding ring (8) is fitted onto the column sleeve (7).

5. The anode-direct-cooled rotating anode X-ray tube as described in claim 1, characterized in that, The rotating support assembly includes a ring sleeve (2) and a limiting ring (3). The limiting ring (3) is disposed at one end of the tube shell (6). The bottom end of the ring sleeve (2) is connected to the limiting ring (3). A convex ring structure (500) is provided on the side of the rotating anode assembly (1). The convex ring structure (500) is disposed between the ring sleeve (2) and the limiting ring (3).

6. The anode-direct-cooled rotating anode X-ray tube as described in claim 5, characterized in that, The surface of the convex ring structure (500) is a grooved surface, and the side surfaces of the rotating anode assembly (1) located above and below the convex ring structure (500) are coated surfaces.

7. The anode-direct-cooled rotating anode X-ray tube as described in claim 6, characterized in that, Herringbone grooves are etched on the grooved surface.

8. The anode-cooled rotating anode X-ray tube as described in claim 1, characterized in that, The rotating support assembly includes a ring sleeve (2) and a limiting ring (3). The ring sleeve (2) is disposed at one end of the tube shell (6). A ring structure (600) is disposed in the middle of the ring sleeve (2). A groove structure (700) is disposed on the side of the rotating anode assembly (1). The ring structure (600) is placed inside the groove structure (700). The limiting ring (3) is disposed at the other end of the ring sleeve (2) and connected to the top end of the groove structure (700).

9. The anode-direct-cooled rotating anode X-ray tube as described in claim 2, characterized in that, The cross-section of the insulating support (9) is trapezoidal.

Images