CN116844931B - X-ray tube, cathode chassis assembly and tube core assembly thereof - Google Patents
X-ray tube, cathode chassis assembly and tube core assembly thereof Download PDFInfo
- Publication number
- CN116844931B CN116844931B CN202311111363.8A CN202311111363A CN116844931B CN 116844931 B CN116844931 B CN 116844931B CN 202311111363 A CN202311111363 A CN 202311111363A CN 116844931 B CN116844931 B CN 116844931B
- Authority
- CN
- China
- Prior art keywords
- cathode
- assembly
- cathode chassis
- chassis
- cooling liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000110 cooling liquid Substances 0.000 claims abstract description 80
- 238000001816 cooling Methods 0.000 claims abstract description 52
- 230000005855 radiation Effects 0.000 claims abstract description 27
- 238000010894 electron beam technology Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 38
- 230000000694 effects Effects 0.000 description 19
- 239000002826 coolant Substances 0.000 description 17
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures
- H01J35/106—Active cooling, e.g. fluid flow, heat pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/064—Details of the emitter, e.g. material or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
Abstract
An X-ray tube and a cathode chassis assembly, a die assembly thereof, the cathode chassis assembly comprising: a cathode chassis having a radiation surface facing an anode target surface of the X-ray tube to absorb heat generated by the anode target surface and a cooling surface disposed opposite to the radiation surface; the disturbance mechanism is arranged on the cooling surface of the cathode chassis, the disturbance mechanism enables the cooling liquid flowing through the cooling surface to generate turbulence, and the cooling liquid is used for exchanging heat with the cathode chassis. The scheme can improve the heat dissipation efficiency and the reliability of the X-ray tube.
Description
Technical Field
The embodiment of the application relates to the technical field of X-ray tubes, in particular to an X-ray tube, a cathode chassis assembly and a tube core assembly thereof.
Background
In an X-ray tube, with the generation of X-rays, a large amount of energy is converted into heat that is stored at the anode of the die assembly, and the heat dissipation capability of the anode will affect the reliability of the X-ray tube. During the X-ray generation process, the cathode assembly emits an electron beam, the electron beam strikes the anode target surface, and a small portion of the electron beam is emitted by the anode target surface to obtain X-rays, and most of the electron beam is converted into heat, which results in a higher temperature of the anode target disk, and the anode target surface is usually the highest temperature component in the X-ray tube. Currently, one of the main ways of anode heat dissipation is that the anode target radiates heat towards the cathode chassis, and the heat dissipation is performed through the cathode chassis.
However, the anode heat dissipation efficiency in the current X-ray tube is low, which affects the reliability of the X-ray tube.
Disclosure of Invention
The technical problem solved by the embodiment of the application is that the anode in the current X-ray tube has lower heat dissipation efficiency and affects the reliability of the X-ray tube.
To solve the above technical problems, an embodiment of the present application provides a cathode chassis assembly of an X-ray tube, the cathode chassis assembly including: a cathode chassis having a radiation surface facing an anode target surface of the X-ray tube to absorb heat generated by the anode target surface and a cooling surface disposed opposite to the radiation surface; the disturbance mechanism is arranged on the cooling surface of the cathode chassis, the disturbance mechanism enables the cooling liquid flowing through the cooling surface to generate turbulence, and the cooling liquid is used for exchanging heat with the cathode chassis.
Optionally, the disturbance mechanism includes a plurality of protruding ribs, forms the runner between the adjacent protruding ribs, the runner is used for guiding the flow direction of coolant liquid, and wherein, the coolant liquid that flows through at least part runner is through the runner back mutual interference.
Optionally, the cooling liquid is introduced or led out from a central area of the cooling surface, and a length direction of the plurality of ribs forms an included angle which is different from zero with a radial direction of the cathode chassis.
Optionally, the included angle between the length direction of the plurality of ribs and the radial direction of the cathode chassis is not identical.
Optionally, the plurality of ribs are arranged as concentric rings on the cathode chassis.
Optionally, there is a non-zero gap between adjacent rings.
Optionally, the ribs in adjacent rings are configured to: the included angle between the length direction of the convex rib in one ring and the length direction of the nearest convex rib in the other ring is more than or equal to 45 degrees and less than or equal to 90 degrees.
Optionally, ribs are provided in the extending direction of at least part of the flow channels.
Optionally, the side wall of the convex rib facing the adjacent convex rib is provided with a bulge.
Optionally, the cathode chassis assembly further comprises a flow homogenizing device connected to the cathode chassis, the flow homogenizing device comprising: the connecting part is used for connecting a cooling liquid pipeline, and the cooling liquid pipeline is used for conveying the cooling liquid; and the uniform flow part is connected with the connecting part and the cathode chassis, and is provided with a plurality of channels which are communicated with the connecting part so as to convey the cooling liquid in the connecting part to the cooling surface or convey the cooling liquid of the cooling surface to the connecting part.
Optionally, a surface of the uniform flow portion facing the cooling surface is provided with guide ribs extending in a radial direction.
Optionally, the flow homogenizing part further comprises a guiding arm, and the guiding arm is used for guiding part of the cooling liquid to flow through the X-ray window of the X-ray tube.
Optionally, the number of the guide arms is a pair, the pair of guide arms are symmetrically arranged relative to the radial direction of the cathode chassis, and the uniform flow device further comprises at least one of the following: a diverting portion between the two guide arms for diverting the cooling liquid flowing through the X-ray window of the X-ray tube so that the cooling liquid bypasses the cathode assembly of the X-ray tube; and the avoidance port is used for avoiding the cathode assembly.
Optionally, the uniform flow device is disposed in a central region of the cathode chassis.
Optionally, a black coating or a green coating is arranged on the radiation surface.
The embodiment of the application also provides a tube core assembly for an X-ray tube, which comprises: any of the cathode chassis assemblies described above; a tube shell connected with the cathode chassis and forming a vacuum cavity, wherein the tube shell is provided with an X-ray window; a cathode assembly connected to the cathode chassis assembly for emitting an electron beam; and the anode is connected with the tube shell, is provided with an anode target surface facing the cathode assembly, is positioned in the vacuum cavity and is used for receiving the electron beam and generating X rays, and the X rays are emitted through an X-ray window.
Optionally, the cathode assembly includes a cathode shield, parallel to the cathode chassis, and in a direction approaching the cathode chassis, the cathode shield is tapered.
Optionally, the die assembly further includes: and the rotating assembly is used for driving the anode to rotate relative to the cathode assembly.
The embodiment of the application also provides an X-ray tube, which comprises: a housing; the cathode chassis assembly is positioned in the shell, or the tube core assembly is positioned in the shell, and a containing cavity is formed between the tube core assembly and the shell, wherein the cooling liquid is contained in the containing cavity.
Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects:
the radiation surface of the cathode chassis absorbs heat generated by the anode target disk, and the cooling of the cathode chassis is realized by heat exchange between cooling liquid flowing on the cooling surface and the cathode chassis, so that heat dissipation is realized. The cooling surface of the cathode chassis is provided with the disturbance mechanism, so that the cooling liquid flowing through the cooling surface generates turbulent flow, the heat transfer coefficient of the cooling liquid and the cathode chassis can be improved, the radiation heat dissipation capacity of the cathode chassis can be further improved, and the heat dissipation efficiency is improved. In addition, the heat generated by the anode target surface is radiated through the cathode chassis as much as possible, the heat conduction to other parts (such as a rotating mechanism and the like) of the X-ray tube is reduced as much as possible, the reliability of the X-ray tube can be improved, and the service life of the X-ray tube can be prolonged.
In addition, through improving the radiating effect of cathode chassis, improve the cathode chassis and absorb the heat from the positive pole target surface through radiation heat transfer, improve the heat conduction effect of cathode chassis and coolant liquid through disturbance mechanism, effectively avoid the temperature rise of cathode chassis to better maintain the higher temperature difference between cathode chassis and the positive pole target surface, and higher temperature difference can help improving the radiating efficiency of positive pole target surface, further improves the radiating effect.
Drawings
Fig. 1 is a schematic view showing a part of the structure of an X-ray tube in an embodiment of the present application;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of an X-ray tube in accordance with an embodiment of the present application;
FIG. 4 is a schematic view of a flow-equalizing device according to an embodiment of the present application at a view angle;
FIG. 5 is a schematic view of the structure of FIG. 4 at one viewing angle;
FIG. 6 is a bottom view of FIG. 4;
FIG. 7 is a schematic view of another flow-homogenizing device in an embodiment of the application;
FIG. 8 is a schematic view of a flow homogenizing device in accordance with another embodiment of the present application;
FIG. 9 is a schematic view of the structure of FIG. 8 at another view angle;
reference numerals illustrate:
a 100-X ray tube; 10-cathode chassis assembly; 1-cathode chassis; 11-a radiation surface; 12-cooling surface; 2-a disturbance mechanism; 21-convex ribs; 22-flow channels; 3-a uniform flow device; 31-a connection; 32-a uniform flow part; 321-guide ribs; 322-guide arms; 3221-vertical wall; 3222-a top wall; 323-perforating; 33-channel; 34-split section; 35-avoiding opening; 37-mounting holes; 20-a tube shell; 201-X-ray window; 30-a cathode assembly; 301-cathode shield; 40-anode; 401-anode target; 50-a housing; 60-accommodating cavity.
Detailed Description
As described above, in the X-ray tube, a large amount of energy is converted into heat to be stored in the anode of the die assembly accompanying the generation of X-rays, and the heat dissipation capability of the anode will affect the reliability of the X-ray tube. At present, the heat dissipation mode of the anode target plate mainly comprises the following three modes. The first heat dissipation mode is to conduct the heat of the anode target disk to the anode end for heat dissipation through the ball bearing. The heat transfer efficiency is low due to the small ball contact area of the ball bearing and the limited space at the anode end. The second heat dissipation mode is that the heat of the anode target disk is transferred to the anode rotor, and is transferred to the shell (the shell made of glass can also be called as a glass shell) through the radiation of the anode rotor, and then the shell is cooled by cooling oil in a convection mode, so that the heat dissipation is realized. The third heat dissipation mode is that the anode target plate radiates and transfers heat to a tube shell (also called as waist hoop) and a cathode chassis of the tube core assembly, and then the tube core waist hoop and the cathode chassis are cooled by cooling oil in a convection mode, so that heat dissipation is realized.
The dominant mode of heat dissipation of the current anode target plate is the third heat dissipation mode. However, the heat dissipation efficiency is low in either the third heat dissipation path or the first or second heat dissipation path. While the anode is less efficient in heat dissipation, which will affect the reliability of the X-ray tube.
In order to solve the above problems, especially for the third heat dissipation mode, the radiation surface of the cathode chassis absorbs the heat generated by the anode target disk, and the cooling liquid flowing on the cooling surface exchanges heat with the cathode chassis to realize cooling of the cathode chassis, so as to realize heat dissipation. The cooling surface of the cathode chassis is provided with the disturbance mechanism, so that the cooling liquid flowing through the cooling surface generates turbulent flow, the heat transfer coefficient of the cooling liquid and the cathode chassis can be improved, the radiation heat dissipation capacity of the cathode chassis can be further improved, and the heat dissipation efficiency is improved. In addition, the heat generated by the anode target surface is radiated through the cathode chassis as much as possible, the heat conduction to other parts (such as a rotating mechanism and the like) of the X-ray tube is reduced as much as possible, the reliability of the X-ray tube can be improved, and the service life of the X-ray tube can be prolonged.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
An embodiment of the present application provides a cathode chassis assembly of an X-ray tube, and referring to fig. 1, a schematic partial structure of an X-ray tube in the embodiment of the present application is given; FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; fig. 3 is a schematic view of an X-ray tube in an embodiment of the application. The specific structure of the cathode chassis assembly of the X-ray tube will be described with reference to fig. 1 to 3.
In particular implementations, the cathode chassis assembly 10 includes: cathode chassis 1 and perturbation mechanism 2. The cathode chassis 1 has a radiation surface 11 and a cooling surface 12, the radiation surface 11 faces an anode target surface 401 of the X-ray tube 100 to absorb heat generated by the anode target surface 401, and the cooling surface 12 is disposed opposite to the radiation surface 11. The perturbation means 2 are arranged on the cooling surface 12 of the cathode chassis 1, the perturbation means 2 cause turbulence of the cooling liquid flowing through the cooling surface 12 for heat exchange with the cathode chassis 1.
As is clear from the above, the radiation surface 11 of the cathode chassis 1 absorbs the heat generated by the anode target surface 401, and the cooling liquid flowing on the cooling surface 12 exchanges heat with the cathode chassis 1 to cool the cathode chassis 1, so as to dissipate the heat. Because the cooling surface of the cathode chassis 1 is provided with the disturbance mechanism 2, the disturbance mechanism 2 enables the cooling liquid flowing through the cooling surface 12 to generate turbulent flow, so that the heat transfer coefficient of the cooling liquid and the cathode chassis 1 can be improved, the radiation heat dissipation capacity of the cathode chassis 1 can be further improved, and the heat dissipation efficiency is improved. In addition, the heat generated by the anode target surface 401 is radiated as much as possible through the cathode chassis 1, so that the heat conduction to other parts (such as a rotating mechanism) of the X-ray tube 100 is reduced as much as possible, the reliability of the X-ray tube 100 is improved, and the service life of the X-ray tube 100 can be prolonged.
In addition, by improving the heat dissipation effect of the cathode chassis 1, and improving the heat conduction effect of the cathode chassis 1 and the cooling liquid while improving the heat absorption of the cathode chassis 1 from the anode target surface 401 through radiation heat transfer, the temperature rise of the cathode chassis 1 can be effectively avoided, a higher temperature difference between the cathode chassis 1 and the anode target surface 401 can be better maintained, and the higher temperature difference can help to improve the radiation efficiency of the anode target surface 401, and further improve the heat dissipation effect.
In a specific implementation, the perturbation mechanism 2 may comprise a plurality of ribs 21. Flow channels 22 are formed between adjacent ribs 21, and the flow channels 22 are used for guiding the flowing direction of the cooling liquid. Further, the cooling liquid flowing through at least part of the flow channels 22 passes through the flow channels 22 to interfere with each other. In this way, the cooling liquid flowing through at least part of the flow channels 22 is mutually interfered after passing through the flow channels 22, so that the cooling liquid can be mutually and fully mixed when flowing through the cooling surface 12, so that the cooling liquid can mutually and fully exchange heat, the heat exchange efficiency of the cooling liquid and the cathode chassis 1 is improved, more heat on the cathode chassis 1 is conducted to the cooling liquid, and the cathode chassis 1 can further radiate and absorb more heat from the anode target surface 401, and the heat dissipation effect is improved.
In some non-limiting embodiments, the cathode chassis 1 is in the form of a disk.
In some embodiments, the cooling fluid is introduced or conducted from a central region of the cooling surface 12, and the length direction of the plurality of ribs 21 forms an angle with the radial direction of the cathode chassis 1 that is different from zero. Because the length direction of the ribs 21 forms an included angle with the radial direction of the cathode chassis 1, the cooling liquid can pass through the cooling surface 12 in different directions after being introduced from the central area of the cooling surface 12, so as to help to improve the turbulence effect generated when the cooling liquid flows through the cooling surface 12.
In some embodiments, the length direction of the ribs 21 is not exactly the same as the radial direction of the cathode chassis 1. In other words, the plurality of ribs 21 can cause turbulence in the coolant, and the reynolds number of the coolant can be increased. By increasing the Reynolds number of the cooling liquid, the heat transfer capability of the cooling liquid can be improved, and the heat dissipation effect can be improved.
Further, the length direction of the ribs 21 is completely different from the radial direction of the cathode chassis 1, so as to further improve the disturbance effect generated when the cooling liquid flows through the cooling surface 12.
In some embodiments, the ribs 21 may have a cube-shaped, cuboid-shaped, polyhedral-shaped or angular structure, so as to ensure that the ribs 21 can generate corresponding flow resistance to the cooling liquid and ensure the disturbance effect.
In order to improve the heat dissipation effect and also to give consideration to manufacturability of the ribs 21, so as to facilitate mass production of the ribs 21 and improve production efficiency, in some embodiments, the ribs 21 are arranged as concentric rings on the cathode chassis 1.
In practice, considering that other components are disposed on the cathode chassis 1, the concentric ring formed by the plurality of ribs 21, some of which are not strictly complete rings, may exist (e.g., the cathode assembly 30, etc.), and some or all of which are part of the complete ring.
Further, there is a gap between adjacent rings that is not zero. Therefore, the gaps which are not zero can enable the cooling liquid to mutually interfere between the adjacent rings, the Reynolds number of the cooling liquid can be improved through the mutual interference, and then the heat transfer coefficient of the cooling liquid is improved, so that the heat dissipation effect is improved.
In some embodiments, the ribs 21 in adjacent rings are configured to: the angle between the length direction of the rib 21 in one ring and the length direction of the nearest rib 21 in the other ring is greater than or equal to 45 degrees and less than or equal to 90 degrees.
In some non-limiting embodiments, ribs 21 are provided in the direction of extension of at least part of the flow channels 22. For example, ribs 21 are provided in the extending direction upstream of at least part of the flow passages 22. As another example, ribs 21 are provided in the extending direction downstream of at least part of the flow channels 22. For another example, ribs 21 are provided in the extending direction both upstream and downstream of at least part of the flow passage 22.
Further, the flow passages 22 of adjacent rings are staggered, which helps to achieve that the cooling liquid can enter the flow passage 22 of the next ring after being mutually interfered and fully mixed after flowing through the flow passage 22 of one ring.
If the ribs 21 are provided in the extending direction downstream of the flow channels 22, the coolant flowing out of the flow channels 22 is blocked by the ribs 21 provided in the extending direction, and the flow of the coolant flowing out of the flow channels 22 is separated and flown into the two flow channels 22 while turbulence is generated due to the blocking of the ribs 21, so that the coolant in the adjacent flow channels 22 can be sufficiently mixed, and the heat transfer effect is improved.
If the ribs 21 are disposed in the upstream extending direction of the flow channel 22, the cooling liquid is blocked by the ribs 21 disposed in the upstream extending direction, so that the cooling liquid of the flow channel 22 can come from different flow channels 22 upstream, and the cooling liquid in the adjacent flow channels 22 can be fully mixed, and the heat transfer effect is improved.
In another aspect, the plurality of ribs 21 are divided into a plurality of rib groups, each rib group extending radially outward from a central region of the cooling surface 12, each rib group including one or more ribs 21. The included angles between the ribs 21 in the same rib group and the radial direction are not identical. Further, the angles between the ribs 21 and the radial direction in the same rib group may be alternately positive and negative, that is, the angle between one rib 21 and the radial direction is positive (e.g., right offset with respect to the radial direction), and then the angle between the next adjacent rib 21 and the radial direction is negative (e.g., left offset with respect to the radial direction). In addition, gaps are formed between adjacent ribs 21 in the same rib group.
Extending outwardly from the central region of the cooling surface 12 in a radial direction includes at least two different flow directions for the flow paths 22 formed by adjacent rib sets. Further, the included angles between the flow direction and the radial direction of the flow channels 22 in the same rib group can be alternately arranged. That is, one of the flow channels 22 is formed with a positive angle (e.g., radially right-angled) with respect to the radial direction, and then the next adjacent flow channel 22 is formed with a negative angle (e.g., radially left-angled) with respect to the radial direction. With gaps between adjacent runners 22.
In some non-limiting embodiments, the ribs 21 are provided with protrusions on the side walls facing the adjacent ribs 21. The provided protrusions can further improve the resistance of the cooling liquid flowing through the flow channel 22, and help to intensify the disturbance effect of the cooling liquid in flowing and increase the heat transfer coefficient of the cooling liquid.
Further, at least part of the protrusion is immersed by the cooling liquid to enhance the disturbing effect of the protrusion on the flow of the cooling liquid.
Further, the shape of the protrusions may be a cube, a triangular pyramid, a polyhedral pyramid, or the like having an angular shape.
The number of the protrusions provided on the side wall of each bead 21 may be one or more.
In a specific implementation, the cathode chassis assembly 10 further comprises a flow homogenizing device 3 connected to the cathode chassis 1. FIG. 4 is a schematic view of a flow-equalizing device according to an embodiment of the present application at a view angle; FIG. 5 is a schematic view of the structure of FIG. 4 at one viewing angle; FIG. 6 is a bottom view of FIG. 4; FIG. 7 is a schematic view of another flow-homogenizing device in an embodiment of the application; FIG. 8 is a schematic view of a flow homogenizing device in accordance with another embodiment of the present application; fig. 9 is a schematic view of the structure of fig. 8 at another view angle. Referring to fig. 4 to 9, the uniform flow device 3 includes: a connection portion 31 and a uniform flow portion 32.
The connection 31 is for connecting a coolant line for transporting the coolant. The coolant line to which the connection portion 31 is connected may be an input line or an output line of the coolant.
A flow-homogenizing part 32 is connected to the connection part 31 and the cathode chassis 1, the flow-homogenizing part 32 has a plurality of passages 33, and the plurality of passages 33 are in communication with the connection part 31 to convey the cooling liquid in the connection part 31 to the cooling surface 12 or to convey the cooling liquid of the cooling surface 12 to the connection part 31. The cooling liquid can be closely attached to the cathode chassis 1 as much as possible through the arranged uniform flow device 3, so that the Reynolds number of the cooling liquid flowing through the cathode chassis 1 can be increased, and the heat transfer coefficient can be improved. In addition, by increasing the reynolds number of the coolant flowing through the cathode chassis 1 by means of the flow-homogenizing device 3, the versatility of the cathode chassis 1 can be improved, and different types of cathode chassis 1 can be adapted.
In some embodiments, referring to fig. 4-7, the uniform flow portion 32 may cooperate with the cooling surface 12 to form a channel 33.
In other embodiments, referring to fig. 8 and 9, the uniform flow portion 32 has a cavity in which guide ribs 321 extending in the radial direction are provided. The guide rib 321 divides the cavity into a plurality of channels 33.
In a specific implementation, the uniform flow portion 32 may be disk-shaped, semicircular, or any other suitable shape.
In practice, the flow-homogenizing device 3 can be connected to the cathode chassis 1 in various ways.
For example, the flow-equalizing device 3 is fixedly connected to the cathode chassis 1 by a fastener such as a screw. The flow-homogenizing part 32 may be provided with mounting holes 37, through which fasteners pass to fix the flow-homogenizing device 3 to the cathode chassis 1.
For another example, the uniform flow device 3 is connected to the cathode chassis 1 by a clamping manner.
For another example, the uniform flow device 3 is fixedly connected to the cathode chassis 1 by bonding.
It will be appreciated that the flow-homogenizing device 3 may also be connected to the cathode chassis 1 by other means, which are not illustrated here.
In a specific implementation, the flow-homogenizing device 3 is arranged in the central region of the cathode chassis 1. I.e. in the central region of the cooling surface 12. The plurality of channels 33 extend radially in the radial direction of the cooling surface 12. Thus, when the connection portion 31 of the uniform flow device 3 is connected to the output line of the cooling liquid, the cooling liquid is converged to the uniform flow device 3 through 360 degrees by the edge of the cooling surface 12 and flows out. When the connection part 31 of the uniform flow device 3 is connected with the input pipeline of the cooling liquid, the cooling liquid flows to the cooling surface 12 along 360 degrees through the input pipeline and the connection part 31.
In some embodiments, the uniform flow portion 32 is provided with an opening 323, and the connection portion 31 is in communication with the channel 33 via the opening 323.
In some embodiments, the surface of the uniform flow portion 32 facing the cooling surface 12 is provided with guide ribs 321 extending in the radial direction. The channels 33 may be formed by adjacent guide ribs 321.
In some embodiments, the direction of extension of the channel 33 may be the same as the direction of extension of the nearest runner 22.
In other embodiments, the direction of extension of the channels 33 is different from the direction of extension of the nearest flow channel 22. In this way, when the coolant in the channel 33 flows into the flow channel 22, the coolant flowing out of the channel 33 may flow into the flow channel 22 after being disturbed by the disturbing means 2. Alternatively, when the coolant in the flow path 22 flows into the channel 33, the coolant flowing out of the flow path 22 is disturbed and then flows into the channel 33.
In an implementation, the flow homogenizing part 32 may further include a guiding arm 322, where the guiding arm 322 is configured to guide a part of the cooling liquid to flow through the X-ray window 201 of the X-ray tube 100. Thus, the heat dissipation effect of the X-ray window 201 can be improved, and the temperature of the X-ray window 201 is prevented from being too high.
In some non-limiting embodiments, the number of guide arms 322 is one pair, i.e., two. A pair of guide arms 322 surrounds the cathode assembly 30 and cooperate with the cathode assembly 30 to form a flow guide for guiding a cooling fluid through the X-ray window 201 of the X-ray tube 100. The flow guide corresponds to at least one channel 33 to ensure the amount of cooling liquid flowing to the X-ray window 201.
Further, a pair of guide arms 322 are disposed symmetrically with respect to the radial direction of the cathode chassis 1. The flow homogenizing device 3 further comprises at least one of the following: a diversion portion 34, and a relief port 35.
The diverting portion 34 is located between the two guide arms 322 for diverting the cooling liquid flowing through the X-ray window 201 of the X-ray tube 100 so that the cooling liquid bypasses the cathode assembly 30 of the X-ray tube 100.
The split 34 is located in the middle of the two guide arms 322 and cooperates with the two guide arms 322 to form the channel 33. The cooling liquid flowing out of the opening 323 is split by the splitting section 34 to flow to the channels 33 on both sides of the splitting section 34, after which the cooling liquid is again converged and flows toward the X-ray window 201. Alternatively, the cooling liquid flowing through the X-ray window 201 to the cooling surface 12 is split by the split portion 34 to flow to the passages 33 on both sides of the split portion 34, and thereafter the cooling liquid is converged again and flows to the opening 323.
The avoidance port 35 is used for avoiding the cathode assembly 30, so that the cathode assembly 30 is mounted on the cathode chassis 1.
In some embodiments, guide arm 322 may be in a variety of structural styles. For example, guide arm 322 may include a vertical wall 3221 and a top wall 3222, vertical wall 3221 being connected to top wall 3222 and being L-shaped, vertical wall 3221 being perpendicular to the plane of flow homogenizing portion 32. The top wall 3222 is parallel to the plane of the uniform flow portion 32.
The pair of guide arms 322 may have a U-shape with an opening of the U-shape serving as the escape opening 35. Or the top walls 3222 of the pair of guide arms 322 are communicated, and through holes are formed in the communicated top walls 3222 to serve as avoiding openings 35.
In some embodiments, the radiation surface 11 is provided with a black plating or a green plating. The black plating layer or the green plating layer provided can improve the heat radiation emissivity of the radiation surface 11, contribute to improving the heat radiation capacity of the cathode chassis 1, and contribute to improving the heat radiation effect.
Embodiments of the present application also provide a die assembly for an X-ray tube 100. Referring to fig. 1 to 4, a die assembly includes: a cathode chassis assembly 10, a cartridge 20, a cathode assembly 30, and the anode 40. A tube housing 20 is connected to the cathode chassis 1 and forms a vacuum chamber, the tube housing 20 being provided with an X-ray window 201. A cathode assembly 30 is connected to the cathode chassis assembly 10 for emitting an electron beam. An anode 40 is connected to the envelope 20, the anode 40 having an anode target surface 401 facing the cathode assembly 30, the anode target surface 401 being located within the vacuum chamber for receiving the electron beam and generating X-rays, the X-rays being emitted through the X-ray window 201.
The cathode chassis assembly 10 may be the cathode chassis assembly 10 provided in any of the foregoing embodiments, and the specific structure and working principle of the cathode chassis assembly 10 may be described in any of the foregoing embodiments, which is not described herein.
In an implementation, the cathode assembly 30 includes a cathode shield 301. Parallel to the cathode chassis 1, the cathode shield 301 becomes smaller in size toward the direction approaching the cathode chassis 1. That is, the cathode shield is necked down, which reduces the angular coefficient between the cathode assembly 30 and the anode target 401, thereby reducing the radiative heat transfer from the anode target 401 to the cathode assembly 30 to limit the amount of heat absorbed by the cathode assembly 30 to avoid an increase in the temperature of the cathode assembly 30.
In a specific implementation, the die assembly further includes a rotating assembly. In some embodiments, the rotating assembly may be a bearing assembly.
In some embodiments, a rotating assembly is used to rotate the anode 40 relative to the cathode assembly 30.
In other embodiments, a rotating assembly is used to rotate the cathode assembly 30 relative to the anode 40.
The cathode chassis assembly 10 provided by the embodiment of the application is adopted by the tube core assembly, and the heat dissipation efficiency of the anode target surface 401 can be improved through the disturbance mechanism 2 on the cathode chassis 1, so that the heat transferred to the rotating assembly can be reduced, the heat of the rotating assembly can be reduced, the service life of the rotating assembly can be prolonged, and the service life of the tube core assembly can be prolonged.
In some embodiments, the inner wall surface of the envelope 20 is provided with a black coating or a green coating to increase the heat radiation emissivity of the envelope 20, which helps to increase the heat radiation capacity of the envelope 20 to increase the heat dissipation effect of the envelope 20.
An embodiment of the present application further provides an X-ray tube, and in combination with fig. 1 to 4, an X-ray tube 100 includes: a housing 50 and a cathode chassis assembly 10 as provided in any of the embodiments above, the cathode chassis assembly 10 being located within the housing 50. The specific structure and operation principle of the cathode chassis assembly 10 can be referred to the description in the above embodiments, and will not be repeated here.
Another X-ray tube according to an embodiment of the present application, the X-ray tube 100 includes: housing 50, and a die assembly provided by any of the embodiments described above. The die assembly is located in the housing 50, and forms a containing cavity 60 with the housing 50, wherein the cooling liquid is contained in the containing cavity 60. The specific structure and operation principle of the die assembly can be referred to the description in the above embodiments, and will not be repeated here.
The term "plurality" as used in the embodiments of the present application means two or more.
Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application should be assessed accordingly to that of the appended claims.
Claims (18)
1. A cathode chassis assembly for an X-ray tube, the cathode chassis assembly comprising:
a cathode chassis having a radiation surface facing an anode target surface of the X-ray tube to absorb heat generated by the anode target surface and a cooling surface disposed opposite to the radiation surface;
the disturbance mechanism is arranged on the cooling surface of the cathode chassis, and enables the cooling liquid flowing through the cooling surface to generate turbulence, and the cooling liquid is used for exchanging heat with the cathode chassis;
the disturbance mechanism comprises a plurality of convex ribs, flow channels are formed between adjacent convex ribs, and the flow channels are used for guiding the flowing direction of the cooling liquid, wherein the cooling liquid flowing through at least part of the flow channels is mutually interfered after passing through the flow channels.
2. The cathode chassis assembly of claim 1, wherein the cooling fluid is introduced or directed from a central region of the cooling surface, and wherein the length of the plurality of ribs forms a non-zero angle with the radial direction of the cathode chassis.
3. The cathode chassis assembly of claim 2, wherein the plurality of ribs have a length that is not exactly the same angle as the radial direction of the cathode chassis.
4. The cathode chassis assembly of claim 1, wherein a plurality of ribs are arranged in concentric rings on the cathode chassis.
5. The cathode chassis assembly of claim 4, wherein there is a non-zero gap between adjacent rings.
6. The cathode chassis assembly of claim 4, wherein the ribs in adjacent rings are configured to: the included angle between the length direction of the convex rib in one ring and the length direction of the nearest convex rib in the other ring is more than or equal to 45 degrees and less than or equal to 90 degrees.
7. The cathode chassis assembly of any one of claims 1 to 6, wherein ribs are provided in the extension direction of at least part of the flow channels.
8. The cathode chassis assembly of claim 1, wherein the ribs are provided with protrusions on the side walls facing adjacent ribs.
9. The cathode chassis assembly of claim 1, further comprising a flow homogenizing device coupled to the cathode chassis, the flow homogenizing device comprising:
the connecting part is used for connecting a cooling liquid pipeline, and the cooling liquid pipeline is used for conveying the cooling liquid;
and the uniform flow part is connected with the connecting part and the cathode chassis, and is provided with a plurality of channels which are communicated with the connecting part so as to convey the cooling liquid in the connecting part to the cooling surface or convey the cooling liquid of the cooling surface to the connecting part.
10. The cathode chassis assembly of claim 9, wherein the surface of the uniform flow section facing the cooling surface is provided with guide ribs extending in a radial direction.
11. The cathode chassis assembly of claim 9, wherein the flow homogenizing portion further comprises a guide arm for guiding a portion of the cooling liquid to flow through an X-ray window of the X-ray tube.
12. The cathode chassis assembly of claim 11, wherein the number of guide arms is a pair, the pair of guide arms being disposed radially symmetrically with respect to the cathode chassis, the flow homogenizing device further comprising at least one of:
a diverting portion between the two guide arms for diverting the cooling liquid flowing through the X-ray window of the X-ray tube so that the cooling liquid bypasses the cathode assembly of the X-ray tube;
and the avoidance port is used for avoiding the cathode assembly.
13. The cathode chassis assembly of claim 9, wherein the flow homogenizing device is disposed in a central region of the cathode chassis.
14. The cathode chassis assembly of claim 1, wherein the radiating surface is provided with a black coating or a green coating.
15. A die assembly for an X-ray tube, comprising:
the cathode chassis assembly of any one of claims 1 to 14;
a tube shell connected with the cathode chassis and forming a vacuum cavity, wherein the tube shell is provided with an X-ray window;
a cathode assembly connected to the cathode chassis assembly for emitting an electron beam;
and the anode is connected with the tube shell, is provided with an anode target surface facing the cathode assembly, is positioned in the vacuum cavity and is used for receiving the electron beam and generating X rays, and the X rays are emitted through an X-ray window.
16. The die assembly of claim 15, wherein the cathode assembly includes a cathode shield that tapers in size parallel to the cathode chassis toward a direction proximate the cathode chassis.
17. The die assembly of claim 15, further comprising: and the rotating assembly is used for driving the anode to rotate relative to the cathode assembly.
18. An X-ray tube, comprising:
a housing;
the cathode chassis assembly of any one of claims 1 to 14, being located within the housing, or the die assembly of any one of claims 15 to 17, being located within the housing and forming a receiving cavity with the housing, wherein the cooling liquid is received within the receiving cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311111363.8A CN116844931B (en) | 2023-08-31 | 2023-08-31 | X-ray tube, cathode chassis assembly and tube core assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311111363.8A CN116844931B (en) | 2023-08-31 | 2023-08-31 | X-ray tube, cathode chassis assembly and tube core assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116844931A CN116844931A (en) | 2023-10-03 |
| CN116844931B true CN116844931B (en) | 2023-11-17 |
Family
ID=88163845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311111363.8A Active CN116844931B (en) | 2023-08-31 | 2023-08-31 | X-ray tube, cathode chassis assembly and tube core assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116844931B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117457460B (en) * | 2023-12-21 | 2024-04-02 | 昆山医源医疗技术有限公司 | X-ray tube, cathode cooling device thereof and tube core assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003142016A (en) * | 2001-10-31 | 2003-05-16 | Toshiba Corp | X-ray generator |
| CN1910968A (en) * | 2004-01-13 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | X-ray tube cooling collar |
| CN102647842A (en) * | 2011-02-16 | 2012-08-22 | 西门子公司 | X-ray radiator system and medical X-ray imaging system with two cooling devices |
| CN102741967A (en) * | 2010-02-02 | 2012-10-17 | 微技术有限责任公司 | X-ray tube |
| CN103327795A (en) * | 2013-06-19 | 2013-09-25 | 华为技术有限公司 | Liquid-cooling heat radiator |
| CN112584594A (en) * | 2019-09-12 | 2021-03-30 | 西门子医疗有限公司 | X-ray radiator and computed tomography scanner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3544534A4 (en) * | 2016-11-22 | 2021-04-21 | Dominion Aesthetic Technologies, Inc. | Apparatus and methods for impingement cooling |
| US10438767B2 (en) * | 2017-11-30 | 2019-10-08 | General Electric Company | Thrust flange for x-ray tube with internal cooling channels |
-
2023
- 2023-08-31 CN CN202311111363.8A patent/CN116844931B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003142016A (en) * | 2001-10-31 | 2003-05-16 | Toshiba Corp | X-ray generator |
| CN1910968A (en) * | 2004-01-13 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | X-ray tube cooling collar |
| CN102741967A (en) * | 2010-02-02 | 2012-10-17 | 微技术有限责任公司 | X-ray tube |
| CN102647842A (en) * | 2011-02-16 | 2012-08-22 | 西门子公司 | X-ray radiator system and medical X-ray imaging system with two cooling devices |
| CN103327795A (en) * | 2013-06-19 | 2013-09-25 | 华为技术有限公司 | Liquid-cooling heat radiator |
| CN112584594A (en) * | 2019-09-12 | 2021-03-30 | 西门子医疗有限公司 | X-ray radiator and computed tomography scanner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116844931A (en) | 2023-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116844931B (en) | X-ray tube, cathode chassis assembly and tube core assembly thereof | |
| JP3988167B2 (en) | X-ray generator having heat transfer device | |
| JP4376480B2 (en) | X-ray tube cooling system | |
| US6084942A (en) | Rotating bulb x-ray radiator with non-pumped coolant circulation | |
| JP3857983B2 (en) | X-ray tube shield structure with large surface area | |
| US7302044B2 (en) | X-ray generator tube comprising an orientable target carrier system | |
| JP2005135908A5 (en) | ||
| EP3492978B1 (en) | Colour wheel device and projector | |
| CN212086768U (en) | Liquid-cooled heat dissipation module and electronic device with same | |
| JP5405413B2 (en) | Liquid cooling of X-ray tube | |
| US7668298B2 (en) | System and method for collecting backscattered electrons in an x-ray tube | |
| US8054945B2 (en) | Evacuated enclosure window cooling | |
| CN108366483B (en) | Accelerating tube and medical linear accelerator with same | |
| CN106783488B (en) | CT system and its cold cathode X-ray tube | |
| JP2686395B2 (en) | Magnetron cooling system | |
| CN111668079A (en) | X-ray tube and anode for an X-ray tube | |
| CN211295028U (en) | X-ray tube device and medical apparatus | |
| CN116437555B (en) | Neutron target and neutron generator for multi-beam deposition | |
| CN210535622U (en) | X-ray tube anode cooling structure | |
| CN206332553U (en) | Motor frame with fork formula heat dissipation channel | |
| CN116033639B (en) | Built-in liquid cooling circulation system of X-ray source | |
| CN214152843U (en) | X-ray generator | |
| CN219554758U (en) | Linear motor | |
| CN111326075B (en) | AC surface discharge plasma display screen | |
| CN212411992U (en) | Heat radiation structure of magnetron, magnetron with heat radiation structure and microwave heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |