X-ray tube and method for improving heat dissipation performance of X-ray tube

Abstract

The invention discloses an X-ray tube and a method for improving the heat dissipation performance of the X-ray tube, and relates to the technical field of X-ray tubes. A heat dissipation curved surface array is arranged on the inner wall of the metal tube shell, and the roughness of the inner wall of the metal tube shell is within a preset range. According to the X-ray tube, the heat dissipation curved surface array is arranged on the inner wall of the metal tube shell, the roughness is within the preset range, the area of the inner wall of the metal tube shell can be increased, a diffuse reflection structure can be formed on the inner wall of the metal tube shell, the diffuse reflection capacity of the metal tube shell is improved, and therefore the heat dissipation performance of the X-ray tube is improved. And the roughness of the inner wall of the metal tube shell is within the preset range, so that the electric field can be uniformly distributed on the inner wall of the metal tube shell, and the running stability of the X-ray tube is enhanced. According to the X-ray tube provided by the embodiment of the invention, internal sparking of the metal tube shell caused by falling of the coating can be avoided, the running stability of the X-ray tube can be improved while the heat dissipation performance of the X-ray tube is improved, and the working efficiency of the X-ray tube is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of X-ray tubes, and in particular to an X-ray tube and a method for improving the heat dissipation performance of the X-ray tube. Background Art

[0002] Under high voltage, the free electrons generated by the hot cathode of the X-ray tube can obtain 120-160kV energy and bombard the anode target of the X-ray tube to generate X-rays. In this process, 99% of the energy will be converted into heat energy, and only 1% of the energy can be converted into X-rays and radiated to the window. In the actual working process of the X-ray tube, the emission flux of the X-ray tube is usually at the level of hundreds of milliamperes, and the corresponding thermal power is tens of kilowatts. After irradiating a patient, the X-ray tube needs to be shut down for a period of time to allow the heat in the X-ray tube to dissipate. Therefore, the heat dissipation performance of the X-ray tube directly affects its working efficiency. The level of the thermal radiation heat transfer coefficient can affect the ability of radiation heat transfer. The thermal radiation heat transfer coefficient of glass is relatively high, at about 0.9. Therefore, there is no need to perform special process treatment on the tube shell of the glass X-ray tube to achieve efficient radiation heat transfer, but the disadvantage of the glass tube shell is that it does not have rigidity and is easy to break. The current mainstream metal tube shell is usually made of stainless steel, which has good mechanical properties, but the thermal radiation heat transfer coefficient of metal is only 0.01-0.1, which cannot achieve efficient heat exchange.

[0003] In the prior art, metal tube shells are usually blackened to improve their radiation heat transfer coefficient. The blackened coating used can be aluminum nitride or ferroferric oxide. The radiation heat transfer coefficient of the metal tube shell after blackening can be increased to 0.85-0.9, which is close to that of the glass tube shell.

[0004] Practice has shown that although the blackening treatment of the metal tube shell can improve its radiation heat transfer coefficient, the blackening layer on the inner surface of the metal tube shell will fall off because the temperature of the X-ray tube can reach 200-400℃ during operation, which will cause ignition inside the X-ray tube and force the CT machine to shut down, seriously affecting its efficiency. In addition, the coating involves the PVD coating process, and the X-ray tube operates under high temperature, high pressure, high vacuum, 10g and above centrifugal load and ionizing radiation environment. Most coating manufacturers do not have coating experience for this type of special equipment, and it is a long process to explore the coating parameters. The temperature, vacuum, voltage, film thickness and target size during the coating process will affect the coating quality and introduce potential ignition risks to the metal tube shell. This also poses a hidden danger to the stability of the product. Summary of the invention

[0005] The present invention provides an X-ray tube and a method for improving the heat dissipation performance of the X-ray tube, which can avoid ignition inside a metal tube shell caused by coating shedding, improve the heat dissipation performance of the X-ray tube and at the same time improve its operating stability, thereby improving the working efficiency of the X-ray tube.

[0006] In a first aspect, an embodiment of the present invention provides an X-ray tube, comprising: a metal tube shell;

[0007] The inner wall of the metal tube shell is provided with a heat dissipation curved surface array, and the roughness of the inner wall of the metal tube shell is within a preset range.

[0008] Optionally, the heat dissipation curved surface array includes a heat dissipation curved surface structure arranged in an array;

[0009] The shape of the heat dissipation curved surface structure includes: at least one of a hemisphere, a semi-cylinder or a cuboid;

[0010] The material of the heat dissipation curved surface structure is the same as that of the metal tube shell.

[0011] Optionally, the X-ray tube further comprises a rotating anode assembly and a bearing assembly;

[0012] The rotating anode assembly and the bearing assembly are both located in the metal tube shell;

[0013] The rotating anode assembly includes an anode target disk, and the bearing assembly includes an anode bearing;

[0014] One end of the anode bearing is fixedly connected to the anode target plate;

[0015] The roughness of at least a portion of the surface of the anode bearing on a side away from the anode target disk is within the preset range.

[0016] Optionally, the metal tube shell includes a first metal tube shell and a second metal tube shell;

[0017] The anode target disk is located in the first metal tube shell, the anode bearing is located in the first metal tube shell and the second metal tube shell, and a portion of the surface of the anode bearing away from the anode target disk is located in the second metal tube shell;

[0018] The inner wall of the first metal tube shell is provided with the heat dissipation curved surface array, and the roughness of the inner walls of the first metal tube shell and the second metal tube shell are both within the preset range.

[0019] In a second aspect, an embodiment of the present invention further provides a method for improving the heat dissipation performance of an X-ray tube, which is applicable to the X-ray tube as described in the first aspect, comprising:

[0020] Making a heat dissipation curved surface array on the inner wall of the metal tube shell;

[0021] The inner wall of the metal tube shell is roughened so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0022] Optionally, the manufacturing of a heat dissipation curved surface array on the inner wall of the metal tube shell includes:

[0023] Milling solder grooves arranged in an array on the inner wall of the metal tube shell;

[0024] Soldering is performed at the solder groove to form the heat dissipation curved surface array.

[0025] Optionally, the manufacturing of a heat dissipation curved surface array on the inner wall of the metal tube shell includes:

[0026] The heat dissipation curved surface array is formed by adopting a welding process or a femtosecond laser etching process.

[0027] Optionally, the roughening of the inner wall of the metal tube shell includes:

[0028] Decontaminating the surface of the metal shell;

[0029] placing the metal tube shell on a conveyor belt;

[0030] The inner wall of the metal tube shell is sandblasted so that the roughness of the inner wall of the metal tube shell is within the preset range.

[0031] Optionally, the sandblasting operation is performed on the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within the preset range:

[0032] Performing sandblasting on the inner wall of the metal tube shell;

[0033] Detecting whether the roughness of the inner wall of the metal tube shell after the sandblasting operation is within the preset range;

[0034] If the roughness of the inner wall of the metal tube shell after the sandblasting operation is not within the preset range, the mesh size of the sand bin and the parameters of the sandblasting bin are adjusted until the roughness of the inner wall of the metal tube shell after the sandblasting operation is performed on the metal tube shell is within the preset range.

[0035] Optionally, the roughening treatment is performed on the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within a preset range, which includes:

[0036] The inner wall of the metal tube shell is corroded by a laser etching process or an electrochemical etching process, so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0037] The embodiment of the present invention provides an X-ray tube and a method for improving the heat dissipation performance of the X-ray tube, wherein the X-ray tube comprises: a metal tube shell; the inner wall of the metal tube shell is provided with a heat dissipation curved surface array, and the roughness of the inner wall of the metal tube shell is within a preset range. The embodiment of the present invention sets a heat dissipation curved surface array on the inner wall of the metal tube shell, and the roughness is within a preset range, which can increase the area of ​​the inner wall of the metal tube shell, and can form a diffuse reflection structure on the inner wall of the metal tube shell, improve the diffuse reflection ability of the metal tube shell, thereby improving the heat dissipation performance of the X-ray tube, and the roughness of the inner wall of the metal tube shell within a preset range can also make the electric field uniformly distributed on the inner wall of the metal tube shell, thereby enhancing the stability of the operation of the X-ray tube. The X-ray tube of the embodiment of the present invention can avoid internal sparking of the metal tube shell caused by coating shedding, improve the heat dissipation performance of the X-ray tube while improving its operation stability, thereby improving the working efficiency of the X-ray tube.

[0038] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A partial structural schematic diagram of an X-ray tube provided by an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of a diffuse reflection structure provided by an embodiment of the present invention;

[0042] Figure 3 A partial structural schematic diagram of another X-ray tube provided by an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of a temperature distribution simulation result of an anode target provided by an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of another temperature distribution simulation result of an anode target provided by an embodiment of the present invention;

[0045] Figure 6 A flow chart of a method for improving the heat dissipation performance of an X-ray tube provided by an embodiment of the present invention;

[0046] Figure 7A flow chart of another method for improving the heat dissipation performance of an X-ray tube provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] Figure 1 A partial structural diagram of an X-ray tube provided in an embodiment of the present invention, referring to Figure 1 The X-ray tube includes: a metal tube shell 100.

[0050] In the embodiment of the present invention, the inner wall of the metal tube shell 100 is provided with a heat dissipation curved surface array 200 , and the roughness of the inner wall of the metal tube shell 100 is within a preset range.

[0051] The preset range is determined by judging whether the inner wall of the metal tube shell 100 forms a diffuse reflection structure, and the roughness of the inner wall of the metal tube shell 100 that forms a diffuse reflection structure is within the preset range. For example, the preset range may be 2.5-4 μm.

[0052] It should be noted that according to the law of radiation thermodynamics, E = C s AΔT 4 , where E is the radiation power, C s is the radiation heat transfer coefficient, A is the surface area, ΔT 4 Is the fourth power of the temperature difference. Radiant power E and radiation heat transfer coefficient C s , surface area A and the fourth power of temperature difference ΔT 4In the embodiment of the present invention, the heat dissipation curved surface array 200 is arranged on the inner wall of the metal tube shell 100, and the roughness of the inner wall of the metal tube shell 100 is within a preset range. Compared with the case where the inner wall of the metal tube shell 100 is smooth, the surface area of ​​the inner wall of the metal tube shell 100 can be increased, thereby improving the radiation power E.

[0053] In addition, the heat dissipation curved surface array 200 is arranged on the inner wall of the metal tube shell 100, and the roughness of the inner wall of the metal tube shell 100 is within a preset range, and a diffuse reflection structure can be formed on the inner wall of the metal tube shell 100, which can improve the diffuse reflection ability of the metal tube shell 100. Exemplarily, Figure 2 A schematic diagram of a diffuse reflection structure provided by an embodiment of the present invention, referring to Figure 2 , the infrared electromagnetic wave will be reflected in multiple directions after being projected on the rough surface A. By forming a diffuse reflection structure on the metal surface, the infrared electromagnetic wave will produce diffuse reflection when projected on the inner wall of the metal tube shell 100, which can improve the radiation heat transfer coefficient C s Kirchhoff's law shows that the ratio of an object's infrared electromagnetic wave emission ability to its absorption ability is a function of wavelength and temperature and has nothing to do with the nature of the object. A good emitter is also a good absorber, so improving the radiation heat transfer coefficient C s , the metal tube shell 100 can enhance its ability to absorb the heat radiated by the anode target disk and reduce the temperature rise of the anode target disk.

[0054] On the other hand, the inner wall roughness of the metal tube shell 100 is within a preset range, which can produce tiny bumps and roughness, and this effect can disperse the electric field, making the electric field more evenly distributed on the inner wall of the metal tube shell 100, and reducing the electric field concentration in the local area. This can reduce the risk of spark discharge and enhance the stability of the X-ray tube operation.

[0055] For example, after the surface of aluminum is polished, the radiation heat transfer coefficient is 0.05, after the surface of aluminum is oxidized, the radiation heat transfer coefficient is 0.55, and after the surface of aluminum is roughened, the radiation heat transfer coefficient is 0.72; after the surface of copper is polished, the radiation heat transfer coefficient is 0.05, after the surface of copper is oxidized, the radiation heat transfer coefficient is 0.78, and after the surface of copper is roughened, the radiation heat transfer coefficient is 0.81; after the surface of stainless steel is polished, the radiation heat transfer coefficient is 0.07, after the surface of stainless steel is oxidized, the radiation heat transfer coefficient is 0.79, and after the surface of stainless steel is roughened, the radiation heat transfer coefficient is 0.77.

[0056] In summary, the embodiment of the present invention sets the heat dissipation curved surface array 200 on the inner wall of the metal tube shell 100, and the roughness is within a preset range, which can increase the area of ​​the inner wall of the metal tube shell 100, and can form a diffuse reflection structure on the inner wall of the metal tube shell 100, improve the diffuse reflection ability of the metal tube shell 100, thereby improving the heat dissipation performance of the X-ray tube, and the roughness of the inner wall of the metal tube shell 100 within a preset range can also make the electric field uniformly distributed on the inner wall of the metal tube shell 100, thereby enhancing the stability of the operation of the X-ray tube. The X-ray tube of the embodiment of the present invention can avoid internal sparking of the metal tube shell 100 caused by the shedding of the coating, improve the heat dissipation performance of the X-ray tube, and improve its operation stability, thereby improving the working efficiency of the X-ray tube.

[0057] Optionally, based on the above embodiment, continue to refer to Figure 1 The heat dissipation curved surface array 200 includes heat dissipation curved surface structures 210 arranged in an array.

[0058] In the embodiment of the present invention, the shape of the heat dissipation curved surface structure 210 includes at least one of a hemisphere, a semi-cylinder or a cuboid. Figure 1 The example shows a case where the shape of the heat dissipation curved surface structure 210 is a semi-cylinder. In the embodiment of the present invention, the material of the heat dissipation curved surface structure 210 is the same as that of the metal tube shell 100 .

[0059] It is understandable that the shape of the heat dissipation curved surface structure 210 may also be other shapes that can increase the surface area of ​​the inner wall of the metal tube shell 100 and improve the diffuse reflection capability, and the specific shape can be set according to the use requirements.

[0060] Figure 3 A partial structural diagram of another X-ray tube provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 3 The X-ray tube further includes a rotating anode assembly 300 and a bearing assembly 400 , and both the rotating anode assembly 300 and the bearing assembly 400 are located in the metal tube shell 100 .

[0061] Continue to refer Figure 3 The rotating anode assembly 300 includes an anode target disk 310, and the bearing assembly 400 includes an anode bearing 410, one end of which is fixedly connected to the anode target disk 310. In the embodiment of the present invention, the roughness of at least part of the surface of the anode bearing 410 away from the anode target disk 310 is within a preset range.

[0062] Among them, continue to refer to Figure 3 The bearing assembly 400 further includes a shaft 420, and the anode target plate 310 is fixedly connected to one end of the anode bearing 410 through the shaft 420, and the connection method can be welding or fixing with screws.

[0063] It should be noted that in the prior art, the side of the anode bearing 410 away from the anode target plate 310 is also subjected to blackening treatment to reduce the temperature gradient. In practice, it is found that since the rotation speed of the anode bearing 410 is 9000-12000RPM, the coating may also fall off. In the embodiment of the present invention, the roughness of at least part of the surface of the side of the anode bearing 410 away from the anode target plate 310 is within a preset range, which can reduce the temperature gradient of the anode bearing 410 and avoid the coating from the root.

[0064] Optionally, based on the above embodiment, continue to refer to Figure 3 The metal tube shell 100 includes a first metal tube shell 110 and a second metal tube shell 120. The anode target plate 310 is located in the first metal tube shell 110, the anode bearing 410 is located in the first metal tube shell 110 and the second metal tube shell 120, and a portion of the surface of the anode bearing 410 away from the anode target plate 310 is located in the second metal tube shell 120. In the embodiment of the present invention, the inner wall of the first metal tube shell 110 is provided with a heat dissipation curved surface array 200, and the roughness of the inner walls of the first metal tube shell 110 and the second metal tube shell 120 are both within a preset range.

[0065] Among them, continue to refer to Figure 3 The bearing assembly 400 further includes an anode fixing seat 430 and a copper sleeve 440. The anode fixing seat 430 is connected to the second metal tube shell 120, and the connection method can be vacuum sealed by welding. The copper sleeve 440 and the shaft rod 420 can be connected by screw fixing. Under the action of the alternating magnetic field, the copper sleeve 440 drives the shaft rod 420 and then drives the rotating anode assembly 300 to rotate, and the anode fixing seat 430 remains unchanged.

[0066] In the embodiment of the present invention, the inner wall of the first metal tube shell 110 is provided with a heat dissipation curved surface array 200, and the roughness of the inner walls of the first metal tube shell 110 and the second metal tube shell 120 are both within a preset range, which can increase the area of ​​the inner wall of the metal tube shell 100, and form a diffuse reflection structure on the inner wall of the metal tube shell 100, thereby improving the diffuse reflection ability of the metal tube shell 100, thereby improving the heat dissipation performance of the X-ray tube, and the roughness of the inner wall of the metal tube shell 100 within the preset range can also make the electric field uniformly distributed on the inner wall of the metal tube shell 100, thereby enhancing the stability of the operation of the X-ray tube. The X-ray tube of the embodiment of the present invention can avoid internal sparking of the metal tube shell 100 caused by the shedding of the coating, improve the heat dissipation performance of the X-ray tube, and improve its operation stability, thereby improving the working efficiency of the X-ray tube.

[0067] In order to verify the heat dissipation effect of the metal tube shell 100 of the X-ray tube provided in the embodiment of the present invention, multi-physics finite element software is used to simulate the internal temperature of the metal tube shell with a ferroferric oxide coating in the prior art and the metal tube shell 100 provided in the embodiment of the present invention. Among them, the material of the anode target in the prior art and the embodiment of the present invention is a composite material of TZM alloy and graphite, and the material of the metal tube shell is stainless steel. Figure 4 A schematic diagram of a temperature distribution simulation result of an anode target plate provided in an embodiment of the present invention, specifically a schematic diagram of a temperature distribution simulation result of an anode target plate when a metal tube shell coated with ferroferric oxide is used in the prior art, Figure 5 Another schematic diagram of a temperature distribution simulation result of an anode target plate provided in an embodiment of the present invention is a schematic diagram of a temperature distribution simulation result of an anode target plate 310 when a heat dissipation curved surface array 200 is arranged on the inner wall of a metal tube shell 100 and the roughness of the inner wall of the metal tube shell 100 is within a preset range.

[0068] refer to Figure 4-5 , the average beam power is set to 4.5kW, and the cooling oil temperature is 80°C in the continuous heat dissipation mode. The radiation heat transfer coefficient of the metal tube shell in the prior art is 0.88, the maximum temperature Max of the anode target plate is 946.8°C, the minimum temperature Min of the anode target plate is 946.71°C, and the temperatures of the anode target plate from high to low are 946.8°C, 946.79°C, 946.78°C, 946.77°C, 946.76°C, 946.75°C, 946.74°C, 946.73°C, 946.72°C, and 946.71°C. The radiation heat transfer coefficient of the metal tube shell 100 provided in the embodiment of the present invention is 0.7, the maximum temperature Max of the anode target plate 310 drops to 835.1°C, the minimum temperature Min of the anode target plate 310 is 835.02°C, and the temperatures of the anode target plate 310 from high to low are 835.1°C, 835.09°C, 835.08°C, 835.07°C, 835.06°C, 835.05°C, 835.04°C, 835.03°C, and 835.02°C. By comparison, it can be seen that compared with the prior art of coating ferroferric oxide on the inner surface of the metal tube shell, the embodiment of the present invention sets a heat dissipation curved surface array 200 on the inner wall of the metal tube shell 100, and makes the roughness of the inner wall of the metal tube shell 100 within a preset range, which can reduce the maximum temperature Max of the anode target plate 310 by about 12%.

[0069] Figure 6 A flowchart of a method for improving the heat dissipation performance of an X-ray tube provided in an embodiment of the present invention is applicable to the X-ray tube provided in the above embodiment, with reference to Figure 6 , the method comprises the following steps:

[0070] S610, manufacturing a heat dissipation curved surface array on the inner wall of the metal tube shell.

[0071] Optionally, based on the above embodiment, step S610 includes: milling solder grooves arranged in an array on the inner wall of the metal tube shell; and performing brazing at the solder grooves to form a heat dissipation curved surface array.

[0072] Optionally, based on the above embodiment, step S610 includes: forming a heat dissipation curved surface array by adopting a welding process or a femtosecond laser etching process.

[0073] Exemplarily, argon arc welding may be used to form the heat dissipation curved surface array.

[0074] S620: Roughen the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0075] Specifically, a batch sandblasting process may be used to roughen the inner wall of the metal tube shell. The batch sandblasting process mainly includes the steps of pretreatment of the metal tube shell, sand material treatment, sandblasting process, and finished product inspection.

[0076] Figure 7 A flowchart of another method for improving the heat dissipation performance of an X-ray tube provided by an embodiment of the present invention, referring to Figure 7 , the method comprises the following steps:

[0077] S710, making a heat dissipation curved surface array on the inner wall of the metal tube shell.

[0078] S720: Roughen the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0079] Optionally, based on the above embodiment, refer to Figure 7 , step S720 includes:

[0080] S721. Decontaminate the surface of the metal tube shell.

[0081] It can be understood that in the pretreatment stage, a heat dissipation curved surface array has been produced on the inner wall of the metal tube shell, and the dirt on the surface of the metal tube shell is removed by ultrasonic cleaning with anhydrous alcohol, and the metal tube shell is placed in a forced air drying oven and dried at 70°C for 40 minutes to evaporate all the surface liquid, thereby completing the surface decontamination of the metal tube shell.

[0082] S722. Place the metal tube shell on the conveyor belt.

[0083] S723, performing sandblasting operation on the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0084] It is understandable that in the sand material processing link, the sand material of the specified mesh size is placed in the sand hopper. The sand material here can be selected from harder materials such as white corundum sand, brown corundum sand or zirconium corundum. The sand material is transferred and screened by the Jiaolong conveyor and the wind separator, and the effective sand material enters the sand blasting chamber. During the sand blasting process, the centrifugal pump compresses the air to form a high-speed airflow with an air pressure of 0.4-0.7Mpa, which drives the sand material to be sprayed onto the inner surface of the tube shell at high speed. The inner wall of the metal tube shell is impacted and cut by the abrasive, so that the inner wall of the metal tube shell is cleaned and its roughness is increased, so that the roughness of the inner wall of the metal tube shell is within the preset range, which can be 2.5-4μm, thereby forming a diffuse reflection structure.

[0085] Optionally, based on the above embodiment, step S723 includes:

[0086] S7231. Sandblast the inner wall of the metal tube shell.

[0087] S7232. Check whether the roughness of the inner wall of the metal tube shell after the sandblasting operation is within a preset range.

[0088] S7233. If the roughness of the inner wall of the metal tube shell after the sandblasting operation is not within the preset range, adjust the mesh size of the sand material bin and the parameters of the sandblasting bin until the roughness of the inner wall of the metal tube shell after the sandblasting operation is performed on the metal tube shell is within the preset range.

[0089] It is understandable that if the roughness of the inner wall of the metal tube shell after the sandblasting operation is within a preset range, the finished product inspection is carried out, and if the quality is qualified, the metal tube shell with qualified quality is placed in the finished product area.

[0090] Optionally, based on the above embodiment, step S720 includes: corroding the inner wall of the metal tube shell by using a laser etching process or an electrochemical etching process, so that the roughness of the inner wall of the metal tube shell is within a preset range.

[0091] The method for improving the heat dissipation performance of an X-ray tube provided in an embodiment of the present invention is applicable to the X-ray tube provided in the above embodiment, and thus has the same beneficial effects. For matters not described in detail in the embodiment of the present invention, reference may be made to the X-ray tube provided in the above embodiment.

[0092] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An X-ray tube, characterized in that: include: Metal tube shell; The inner wall of the metal tube shell is provided with a heat dissipation curved surface array for improving the diffuse reflection capability of the metal tube shell, and the roughness of the inner wall of the metal tube shell is within a preset range.

2. The X-ray tube according to claim 1, characterized in that The heat dissipation curved surface array includes heat dissipation curved surface structures arranged in an array; The shape of the heat dissipation curved surface structure includes: at least one of a hemisphere, a semi-cylinder or a cuboid; The material of the heat dissipation curved surface structure is the same as that of the metal tube shell.

3. The X-ray tube according to claim 1, characterized in that The X-ray tube also includes a rotating anode assembly and a bearing assembly; The rotating anode assembly and the bearing assembly are both located in the metal tube shell; The rotating anode assembly includes an anode target disk, and the bearing assembly includes an anode bearing; One end of the anode bearing is fixedly connected to the anode target plate; The roughness of at least a portion of the surface of the anode bearing on a side away from the anode target disk is within the preset range.

4. The X-ray tube according to claim 3, characterized in that The metal tube shell comprises a first metal tube shell and a second metal tube shell; The anode target disk is located in the first metal tube shell, the anode bearing is located in the first metal tube shell and the second metal tube shell, and a portion of the surface of the anode bearing away from the anode target disk is located in the second metal tube shell; The inner wall of the first metal tube shell is provided with the heat dissipation curved surface array, and the roughness of the inner walls of the first metal tube shell and the second metal tube shell are both within the preset range.

5. A method for improving the heat dissipation performance of an X-ray tube, characterized in that: The X-ray tube according to any one of claims 1 to 4 comprises: A heat dissipation curved surface array is fabricated on the inner wall of the metal tube shell to enhance the diffuse reflection capability of the metal tube shell; The inner wall of the metal tube shell is roughened so that the roughness of the inner wall of the metal tube shell is within a preset range.

6. The method for improving the heat dissipation performance of an X-ray tube according to claim 5, characterized in that: The manufacturing of the heat dissipation curved surface array on the inner wall of the metal tube shell comprises: Milling solder grooves arranged in an array on the inner wall of the metal tube shell; Soldering is performed at the solder groove to form the heat dissipation curved surface array.

7. The method for improving the heat dissipation performance of an X-ray tube according to claim 5, characterized in that: The manufacturing of the heat dissipation curved surface array on the inner wall of the metal tube shell comprises: The heat dissipation curved surface array is formed by adopting a welding process or a femtosecond laser etching process.

8. The method for improving the heat dissipation performance of an X-ray tube according to claim 5, characterized in that: The roughening treatment of the inner wall of the metal tube shell comprises: Decontaminating the surface of the metal shell; placing the metal tube shell on a conveyor belt; The inner wall of the metal tube shell is sandblasted so that the roughness of the inner wall of the metal tube shell is within the preset range.

9. The method for improving the heat dissipation performance of an X-ray tube according to claim 8, characterized in that: The sandblasting operation is performed on the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within the preset range: Performing sandblasting on the inner wall of the metal tube shell; Detecting whether the roughness of the inner wall of the metal tube shell after the sandblasting operation is within the preset range; If the roughness of the inner wall of the metal tube shell after the sandblasting operation is not within the preset range, the mesh size of the sand bin and the parameters of the sandblasting bin are adjusted until the roughness of the inner wall of the metal tube shell after the sandblasting operation is performed on the metal tube shell is within the preset range.

10. The method for improving the heat dissipation performance of an X-ray tube according to claim 5, characterized in that: The roughening treatment of the inner wall of the metal tube shell so that the roughness of the inner wall of the metal tube shell is within a preset range includes: The inner wall of the metal tube shell is corroded by a laser etching process or an electrochemical etching process, so that the roughness of the inner wall of the metal tube shell is within a preset range.

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