Structure for improving heat dissipation efficiency of rotary anode target disc and target disc
By setting grooves on the surface of the heat storage layer of the rotating anode target disk and using graphite material, the heat dissipation area is increased, which solves the problem of low heat dissipation efficiency of existing rotating anode target disks and achieves a more efficient heat dissipation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
- Filing Date
- 2024-12-13
- Publication Date
- 2026-04-21
AI Technical Summary
Existing methods for cooling rotating anode target disks are insufficient, especially in high vacuum environments where heat dissipation efficiency is low, making it difficult to meet the high-temperature requirements of CT scanning equipment.
Grooves are set on the surface of the heat storage layer of the rotating anode target disk to increase the heat dissipation area. The heat storage layer is made of graphite material, and the heat dissipation effect is optimized by adjusting the shape and arrangement of the grooves.
It significantly improves the heat dissipation efficiency of the rotating anode target disk, shortens the cooling time by 25%-35%, and enhances the heat dissipation capacity of CT scanning equipment.
Smart Images
Figure CN224140826U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotating anode target technology, and in particular to a structure and target for improving the heat dissipation efficiency of a rotating anode target. Background Technology
[0002] CT (Computed Tomography) is a medical imaging technique that provides detailed cross-sectional images of the human body's internal structures. A CT scan uses an X-ray tube and detector that rotate around the patient to capture image data from different angles, which is then processed by a computer to generate detailed three-dimensional images. In CT technology, the rotating anode target disk is the source of X-rays in the CT tube and is one of the key components of the X-ray tube.
[0003] The rotating anode target disk is a typical sandwich structure. In existing target disk designs, a thin tungsten-rhenium alloy layer is placed on top as the track layer. Below the track layer, a titanium-zirconium-molybdenum alloy (TZM molybdenum alloy) matrix layer is bonded together, and graphite is welded to the back of the target surface layer as a heat storage layer. During the operation of the rotating anode target disk, an ultra-high voltage (100kV) needs to be applied to the cathode to emit electrons, thus requiring a high vacuum environment inside the X-ray tube. At the same time, the continuous bombardment of the electron beam by the target disk causes the overall temperature of the target disk to rise rapidly, thus requiring the target disk to have good heat dissipation capabilities.
[0004] There are two main methods for optimizing the heat dissipation of rotating anode target disks: one is to use multi-layer structures and add heat sinks, but this method is limited by space; the other is to improve heat dissipation efficiency by changing the heat dissipation method, such as using liquid cooling or air cooling, but its heat dissipation effect is greatly affected by the ambient temperature and its heat dissipation efficiency is low. Therefore, how to overcome the shortcomings of the existing technology and improve the heat dissipation efficiency of rotating anode target disks is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] To address the problem of insufficient heat dissipation in the existing rotating anode target disk, this utility model provides a structure for improving the heat dissipation efficiency of the rotating anode target disk, including a heat storage layer. The heat storage layer is provided with through holes to form an inner surface and an outer surface. The heat storage layer also includes an upper surface and a lower surface. The through holes are coaxial with the heat storage layer. Grooves are provided on one or more surfaces of the inner surface, outer surface, or lower surface of the heat storage layer.
[0006] In one embodiment, the groove cross-section is one or more of trapezoidal, arc-shaped, or triangular, and the grooves are distributed in a circle with the axis of the heat storage layer as the center.
[0007] In one embodiment, the upper base of the trapezoid is 0.1-5mm, the lower base is 0.1-10mm, the height is 0.1-10mm, and the distance between the grooves is 0.1-10mm.
[0008] Furthermore, the upper base of the trapezoidal grooves on the outer, inner, and lower surfaces is far from their surfaces, and the angle between the base and waist of the trapezoid is less than 90°.
[0009] In one embodiment, the radius of curvature of the arc is 0.1-10 mm, the central angle of the arc is 10-180°, and the distance between the grooves is 0.1-10 mm.
[0010] In one embodiment, the base length of the triangle is 0.1-5mm, the height of the triangle is 0.1-5mm, the angle of the vertex angle of the triangle is 25-75°, and the distance between the grooves is 0.1-10mm.
[0011] In one embodiment, the lower surface of the heat storage layer is an annular inclined surface extending from the outer edge to the center in the outer periphery, and the height of the inner ring of the inclined surface is greater than the height of the outer ring of the inclined surface.
[0012] In one embodiment, the height of the slope is within 40% of the height of the thermal storage layer.
[0013] In one embodiment, the heat storage layer is made of graphite.
[0014] This utility model also provides a target disk, including a base layer, the upper surface of which is covered with a track layer, and the lower part of the base layer is connected to the upper surface of a heat storage layer. The heat storage layer is a structure for improving the heat dissipation efficiency of a rotating anode target disk as described above.
[0015] In one embodiment, the substrate layer is made of a molybdenum alloy, and the orbital layer is made of a tungsten-rhenium alloy.
[0016] Compared with the prior art, the present invention provides a structure for improving the heat dissipation efficiency of a rotating anode target disk by increasing the surface area of the rotating anode target disk, thereby increasing the heat dissipation area of the rotating anode target disk and thus improving the heat dissipation efficiency of the rotating anode target disk.
[0017] Other features and beneficial effects of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other beneficial effects of this invention can be realized and obtained through the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A structural schematic diagram of Embodiment 1 provided by this utility model from the front view;
[0020] Figure 2 for Figure 1 AA cross-section view;
[0021] Figure 3 A structural schematic diagram of Embodiment 2 provided by this utility model from the front view;
[0022] Figure 4 for Figure 3 AA cross-section view;
[0023] Figure 5 A structural schematic diagram of Embodiment 3 provided by this utility model from the front view;
[0024] Figure 6 for Figure 5 AA cross-section view.
[0025] Figure label:
[0026] Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] This utility model provides, for example Figure 1-2 Example 1 Figure 3-4 Example 2 Figure 5-6 The structure for improving heat dissipation efficiency of a rotating anode target disk shown in Embodiment 3 includes a heat storage layer 300. The heat storage layer 300 is provided with through holes to form an inner surface 320 and an outer surface 330. The heat storage layer 300 also includes an upper surface 340 and a lower surface 350. The through holes are coaxial with the heat storage layer 300. Grooves 310 are provided on one or more surfaces of the inner surface 320, outer surface 330 or lower surface 350 of the heat storage layer 300.
[0030] Specifically, such as Figure 1-6 As shown, a groove 310 is provided on the surface of the heat storage layer 300. By increasing the surface area of the heat storage layer 300 of the rotating anode target disk, the heat dissipation area of the rotating anode target disk is increased, thereby improving the heat dissipation efficiency of the rotating anode target disk.
[0031] Preferably, the through holes on the heat storage layer 300 make the upper surface 340 and the lower surface 350 of the heat storage layer 300 annular with equal inner diameters; specifically, the shape of the heat storage layer 300 is one of a cylinder, a frustum, or an inverted frustum with through holes. In this utility model, the shape and structure selection of the heat storage layer 300 includes, but is not limited to, the embodiment scheme.
[0032] Preferably, the cross-section of the groove 310 is one or more of trapezoidal, arc-shaped, or triangular, and the groove 310 is distributed in a circular pattern around the axis of the heat storage layer 300.
[0033] By adopting the above technical solution, the surface area of the rotating anode target disk heat storage layer 300 can be further increased. Through the grooves 310 distributed in a circular pattern around the axis of the heat storage layer 300, the space on the surface of the heat storage layer 300 can be fully utilized, the surface area can be further expanded, the heat flow distribution can be uniform, and the heat dissipation efficiency can be improved.
[0034] It should be noted that the groove 310 can adopt the same shape and structure, for example, Figure 1-2 Example 1 Figure 3-4Example 2 Figure 5-6 The scheme shown in Embodiment 3; the groove 310 can also be any combination of various shapes and structures; in this utility model, the shape and structure selection of the groove 310 includes, but is not limited to, the scheme of the embodiment.
[0035] It should also be noted that, in addition to the preferred arrangement of the grooves 310 in a circular pattern around the axis of the heat storage layer 300 (e.g., in embodiments 1-3), they can also be arranged in any dispersed manner, including but not limited to the embodiments.
[0036] Preferred, such as Figure 1-2 As shown in Embodiment 1, the upper base of the trapezoid is 0.1-5mm, the lower base of the trapezoid is 0.1-10mm, the height of the trapezoid is 0.1-10mm, and the distance between the grooves 310 is 0.1-10mm.
[0037] More preferably, the upper base of the trapezoid is close to the axis of the heat storage layer 300, and the angle between the base and the waist of the trapezoid is less than 90°.
[0038] Preferred, such as Figure 3-4 As shown in Embodiment 2, the radius of curvature of the arc is 0.1-10mm, the central angle of the arc is 10-180°, and the distance between the grooves 310 is 0.1-10mm.
[0039] Preferred, such as Figure 5-6 As shown in Embodiment 3, the base length of the triangle is 0.1-5mm, the height of the triangle is 0.1-5mm, the angle of the vertex angle of the triangle is 25-75°, and the distance between the grooves 310 is 0.1-10mm.
[0040] By adopting the above technical solution, and by controlling the specific dimensions of the trapezoid, arc and triangle shapes, as well as the distance between the grooves 310, the stability and mechanical strength of the groove 310 structure can be guaranteed, and the surface area of the heat storage layer 300 can be further increased to improve the heat dissipation efficiency.
[0041] Preferred, such as Figure 1-6 As shown, the lower surface 350 of the heat storage layer 300 is an annular inclined surface extending from the outer edge to the center in the outer peripheral region, and the height of the inner ring of the inclined surface is greater than the height of the outer ring of the inclined surface.
[0042] Preferably, the height of the inclined surface is within 40% of the height of the heat storage layer 300.
[0043] By adopting the above technical solution, by setting the lower surface 350 of the heat storage layer 300 as an inclined surface, the surface area of the heat storage layer 300 can be further increased, the heat dissipation area can be increased, and the heat dissipation efficiency can be improved. By controlling the height of the inclined surface to be within 40% of the height of the heat storage layer 300, the stability of the structure of the heat storage layer 300 can be ensured, while the heat dissipation area can be increased.
[0044] It should be noted that the terms "inner surface 320", "outer surface 330", "inner ring", "outer ring", "inner diameter", and "outer diameter" used in this article refer to the direction of the axis closer to the thermal storage layer 300 as "inner" and the direction of the axis farther away from the thermal storage layer 300 as "outer". Therefore, "the height of the inner ring of the inclined plane is greater than the height of the outer ring of the inclined plane" means that the height of the inclined plane gradually decreases along the direction from the center of the thermal storage layer 300 to the outer edge of the thermal storage layer 300.
[0045] Preferably, the heat storage layer 300 is made of graphite.
[0046] By adopting the above scheme, the large emissivity and fast heat dissipation of graphite can be utilized to help dissipate the heat generated by the anode target disk during operation.
[0047] This utility model also provides a target disk, including a substrate layer 200, the upper surface 340 of the substrate layer 200 is covered with a track layer 100, and the lower part of the substrate layer 200 is connected to the upper surface 340 of the heat storage layer 300. The heat storage layer 300 is a structure for improving the heat dissipation efficiency of a rotating anode target disk as described above.
[0048] like Figure 1-6 As shown, a track layer 100 is covered on the upper surface 340 of the substrate layer 200. The substrate layer 200 is connected to the upper surface 340 of the heat storage layer 300 below. The heat storage layer 300 is a hollow cylinder and includes an inner surface 320, an outer surface 330, an upper surface 340, and a lower surface 350. A groove 310 is provided on one or more surfaces of the inner surface 320, outer surface 330, or lower surface 350 of the hollow cylinder.
[0049] Preferably, the substrate layer 200 is made of molybdenum alloy, and the track layer 100 is made of tungsten-rhenium alloy.
[0050] More preferably, the substrate layer 200 is made of TZM molybdenum alloy.
[0051] Using the above technical solution, the orbital layer 100 uses tungsten-rhenium alloy as the target surface material. Molybdenum alloy has a lower density than tungsten-rhenium, but a higher specific heat capacity. Therefore, using molybdenum alloy as the substrate layer 200 can improve the heat capacity of the target disk.
[0052] Heat dissipation efficiency test
[0053] Using a conventional rotating anode target disk with a smooth surface of the heat storage layer as a comparative example, the present invention also tests the heat dissipation efficiency of the rotating anode target disks of Examples 1-3 and the comparative example:
[0054] Test method:
[0055] The rotating anode target disk was heated to 1400°C with an electron beam (measured with an infrared thermometer), and then cooled to 600°C at room temperature. The time required for cooling was measured.
[0056] The test results are shown in Table 1:
[0057] Table 1
[0058]
[0059] As shown in Table 1, the heat dissipation efficiency of Examples 1-3 was improved by 25%-35% compared with the comparative examples.
[0060] In summary, the present invention provides a structure and target disk for improving the heat dissipation efficiency of a rotating anode target disk. By increasing the surface area of the rotating anode target disk, the heat dissipation area of the rotating anode target disk is increased, thereby significantly improving the heat dissipation efficiency of the rotating anode target disk.
[0061] Although this document frequently uses terms such as orbital layer, substrate layer, heat storage layer, and groove, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.
[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A structure for improving heat dissipation efficiency of a rotating anode target disk, characterized by: The device includes a heat storage layer, which has through holes to form an inner surface and an outer surface. The heat storage layer also includes an upper surface and a lower surface. The through holes are coaxial with the heat storage layer. Grooves are provided on one or more surfaces of the inner surface, outer surface, or lower surface of the heat storage layer.
2. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 1, characterized in that: The groove cross-section is one or more of trapezoidal, arc-shaped, or triangular, and the grooves are distributed in a circle with the axis of the heat storage layer as the center.
3. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 2, characterized in that: The upper base of the trapezoid is 0.1-5mm, the lower base is 0.1-10mm, the height is 0.1-10mm, and the distance between the grooves is 0.1-10mm.
4. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 2, characterized in that: The radius of curvature of the arc is 0.1-10mm, the central angle of the arc is 10-180°, and the distance between the grooves is 0.1-10mm.
5. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 2, characterized in that: The base length of the triangle is 0.1-5mm, the height of the triangle is 0.1-5mm, the angle of the vertex angle of the triangle is 25-75°, and the distance between the grooves is 0.1-10mm.
6. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 1, characterized in that: The lower surface of the thermal storage layer is an annular inclined surface extending from the outer edge to the center on the outer periphery, and the height of the inner ring of the inclined surface is greater than the height of the outer ring of the inclined surface.
7. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 6, characterized in that: The height of the inclined plane is within 40% of the height of the thermal storage layer.
8. The structure for improving heat dissipation efficiency of a rotating anode target disk according to claim 1, characterized in that: The heat storage layer is made of graphite.
9. A target disk characterized by: It includes a substrate layer, the upper surface of which is covered with a track layer, and the lower part of the substrate layer is connected to the upper surface of the heat storage layer. The heat storage layer is a structure for improving heat dissipation efficiency of a rotating anode target disk as described in any one of claims 1-8.
10. The target disk of claim 9, wherein: The substrate layer is made of molybdenum alloy, and the orbital layer is made of tungsten-rhenium alloy.