Radiating device, ray tube and CT (Computed Tomography) equipment with ray tube

Abstract

The utility model discloses a heat radiation device, a ray tube and a CT device with the ray tube, the heat radiation device comprises a cooling sleeve body, a plurality of first channels, a plurality of second channels, a plurality of radiating fins and a plurality of radiating fins, the cooling sleeve body is provided with a through mounting cavity along the axial direction so as to be sleeved outside a rotor copper sleeve, and the first channels are used for cooling liquid circulation; the first matching part is connected with one end of the cooling jacket body so as to be matched with the anode target, and a plurality of second channels communicated with the first channel are defined in the first matching part; and the second matching part is connected with the other end of the cooling sleeve body so as to be connected with the bearing sleeve, and a plurality of liquid inlets and liquid outlets which are communicated with the first channel are formed in the second matching part. According to the heat dissipation device provided by the embodiment of the utility model, the heat of the anode target can be absorbed, the temperature of the anode target is reduced, and the cooling speed of the anode target is accelerated; the heat radiated to the rotor copper sleeve by the anode target is greatly reduced; heat radiated to the heat dissipation device by the rotor copper sleeve is increased, and the service life of the rotating anode assembly is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum technology, specifically relating to a heat dissipation device, an X-ray tube, and a CT device having the same. Background Technology

[0002] X-ray tubes and CT tubes are X-ray tubes that generate X-rays by bombarding a radiation conversion target with an electron beam. They are key components of X-ray and CT machines. Electrons emitted from the cathode (usually a tungsten filament) bombard the anode target at high speed under the influence of a high-voltage electric field, producing X-rays through bremsstrahlung. However, only 1% of the electron beam energy is converted into X-rays; the remaining 99% is converted into heat and deposited in the anode target, causing a sharp rise in the anode target temperature. CT tubes use a rotating anode structure, and the average temperature of the anode target can reach over 1200℃. The temperature of the target surface bombarded by the electron beam is even higher. Currently, heat dissipation in X-ray and CT tubes is mainly achieved through thermal radiation. However, the interior of X-ray and CT tubes is a vacuum environment, making it difficult for the heat generated by the anode target to dissipate. Furthermore, heat dissipation is limited by the radiation area and material, resulting in low efficiency. The heat radiated or conducted from the anode target to the bearings causes a significant increase in bearing temperature. If the bearing temperature becomes too high, it will malfunction or even be damaged, leading to the failure of the X-ray tube or CT tube. Therefore, it is very important to reduce and control the temperature of the anode target and bearings when X-ray tubes and CT tubes are in operation. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a heat dissipation device, an X-ray tube, and a CT device having the same, in order to solve the problem in the prior art that the rotating anode has poor thermal shielding effect, which easily leads to rapid heating of the bearing and thus anode target failure.

[0004] The first aspect of this utility model provides a heat dissipation device for heat dissipation of a rotating anode assembly in a ray tube. The rotating anode assembly includes an anode target, a rotor copper sleeve, and a bearing. The bearing has a bearing sleeve, and the bearing sleeve is connected to the anode target through the rotor copper sleeve. The heat dissipation device includes:

[0005] The cooling jacket body defines an axially extending mounting cavity for fitting over the rotor copper sleeve, and the cooling jacket body defines a plurality of first channels for coolant flow.

[0006] The first mating part is connected to one end of the cooling jacket body for mating with the anode target;

[0007] The second mating part is connected to the other end of the cooling jacket body for mating with the bearing sleeve. The second mating part is provided with a plurality of liquid inlets and liquid outlets that communicate with the first channel.

[0008] Furthermore, the cooling jacket body is coaxially arranged with the bearing sleeve, and the cooling jacket body includes:

[0009] A first sleeve defines the mounting cavity, and the outer wall surface of the first sleeve defines a plurality of strip-shaped first grooves extending along its axial direction.

[0010] The second sleeve is fitted onto the first sleeve, and the inner wall of the second sleeve mates with the first groove to define the first channel.

[0011] Furthermore, the first mating part is coaxially disposed with the bearing sleeve, and the first mating part defines a plurality of second channels communicating with the first channel. The first mating part includes:

[0012] A first annular plate, the inner periphery of which is connected to one end of the first sleeve, one side of which faces the anode target, and the other side which defines a plurality of U-shaped second grooves with openings extending toward one end of the cooling sleeve body.

[0013] The second annular plate has its inner periphery connected to one end of the second sleeve and its outer periphery connected to the outer periphery of the first annular plate. The second annular plate is disposed on one side of the first annular plate and one side of the second annular plate cooperates with the second groove to define the second channel. The end of the second channel is connected to one end of the corresponding first channel.

[0014] Furthermore, the second mating part is coaxially disposed with the bearing sleeve, and the second mating part includes:

[0015] The third sleeve is sleeved on the bearing sleeve and cooperates with the bearing sleeve. The third sleeve defines a plurality of third channels. One end of the third channel extends to the outer wall surface of the third sleeve and one end communicates with the other end of the corresponding first channel. The other end extends to the end face of the other end of the third sleeve to form the liquid outlet or the liquid inlet.

[0016] A fourth sleeve is fitted onto the third sleeve, with one end of the fourth sleeve connected to the other end of the second sleeve and the other end connected to the other end of the third sleeve.

[0017] Furthermore, the liquid outlets are evenly spaced apart circumferentially along the end face of the other end of the third sleeve, the liquid inlets are evenly spaced apart circumferentially along the end face of the other end of the third sleeve, and the liquid outlets are located outside the liquid inlets.

[0018] Furthermore, the first sleeve and the third sleeve are integrally formed parts; and / or,

[0019] The second sleeve and the fourth sleeve are integrally formed parts; and / or,

[0020] The second sleeve and the second annular plate are integrally formed parts; and / or,

[0021] The first sleeve is welded to the first annular plate; and / or,

[0022] The first annular plate is welded to the second annular plate; and / or,

[0023] The third sleeve is welded to the fourth sleeve; and / or,

[0024] The third sleeve is welded to the bearing sleeve.

[0025] Furthermore, the heat dissipation device undergoes a blackening treatment.

[0026] Furthermore, the anode target defines a plurality of recesses or protrusions on the side facing the first mating portion, and the first mating portion is formed as a bent structure that mates with the recesses or protrusions.

[0027] The ray tube according to a second aspect of the present invention includes the heat dissipation device described in the above embodiments.

[0028] A CT device with an X-ray tube according to a third aspect of the present invention includes the X-ray tube described in the above embodiments.

[0029] The heat dissipation device according to the present invention can absorb the heat of the anode target, reduce the temperature of the anode target, and accelerate the cooling rate of the anode target; significantly reduce the heat radiated from the anode target to the rotor copper sleeve; increase the heat radiated from the rotor copper sleeve to the heat dissipation device, and improve the service life of the rotating anode assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the assembly of the heat dissipation device and the rotating anode assembly according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of a heat dissipation device according to an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 A cross-sectional view along line AA;

[0033] Figure 4 This is a schematic diagram of the structure of the first sleeve, the first annular plate, and the third sleeve in the heat dissipation device according to an embodiment of the present utility model;

[0034] Figure 5This is another assembly diagram of the heat dissipation device and the rotating anode assembly according to an embodiment of the present invention.

[0035] Figure Labels

[0036] Heat dissipation device 100;

[0037] Cooling jacket body 10; first sleeve 11; first groove 111; second sleeve 12; first channel 13; mounting cavity 14;

[0038] First mating part 20; first annular plate 21; second groove 211; second annular plate 22; second channel 23;

[0039] Second mating part 30; Third sleeve 31; Fourth sleeve 32; Third channel 33; Liquid inlet 34; Liquid outlet 35;

[0040] Anode target 200; mating groove 210;

[0041] Rotor copper sleeve 300; metal support rod 310; support rod seat 320; copper sleeve 330;

[0042] Bearing 400; Bearing sleeve 410;

[0043] Anode housing assembly 500;

[0044] End cap 600; inlet chamber 610; outlet chamber 620. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0046] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The following is combined Figures 1 to 5 The heat dissipation device 100 provided in this utility model embodiment will be described in detail through specific embodiments and application scenarios.

[0048] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0049] like Figure 1 As shown, the heat dissipation device 100 according to an embodiment of the present invention is used for heat dissipation of a rotating anode assembly in a ray tube. The rotating anode assembly includes an anode target 200, a rotor copper sleeve 300, and a bearing 400. The bearing 400 has a bearing sleeve 410. Further, the rotor copper sleeve 300 is mainly composed of a metal support rod 310, a support rod seat 320, and a copper sleeve 330. The bearing sleeve 410 is connected to the anode target 200 through the rotor copper sleeve 300. Figure 3 As shown, the heat dissipation device 100 includes a cooling jacket body 10, a first mating part 20, and a second mating part 30.

[0050] Specifically, such as Figure 1 and Figure 3 As shown, the cooling jacket body 10 defines a mounting cavity 14 extending axially therethrough to be fitted over the copper sleeve 330. The cooling jacket body 10 defines a plurality of first channels 13 for coolant flow. A first mating part 20 is connected to one end of the cooling jacket body 10 for mating with the anode target 200, and a second mating part 30 is connected to the other end of the cooling jacket body 10 for mating with the bearing sleeve 410. Figure 2 As shown, the second mating part 30 is provided with a plurality of liquid inlets 34 and liquid outlets 35 that are connected to the first channel 13.

[0051] In the prior art, the heat deposited after the electron beam emitted from the cathode bombards the anode target 200 is partially conducted to the shaft of the bearing 400 through the metal support rod 310 and support rod seat 320 connecting the rotor copper sleeve 300 and the anode target 200; another portion is radiated from the anode target 200 to the rotor copper sleeve 300, and then conducted to the shaft of the bearing 400, or radiated from the inner surface of the copper sleeve 330 to the bearing 400. This results in a significant increase in the temperature of the bearing 400. If the bearing 400 temperature is too high, it will malfunction, or even be damaged, leading to the failure of the X-ray tube. This invention, by providing a heat dissipation device 100 between the anode target 200 and the rotor copper sleeve 300, and on the outer surfaces of the rotor copper sleeve 300 and the bearing sleeve 410, can significantly reduce the heat conducted from the anode target 200 to the rotor copper sleeve 300 through thermal radiation. Specifically, as... Figure 3 As shown, one end of the cooling jacket body 10 is connected to the first mating part 20, and the other end is connected to the second mating part 30, as... Figure 1 As shown, in order to better radiate heat from the anode target 200 to the heat dissipation device 100, the side of the anode target 200 facing the heat dissipation device 100 can be recessed inward to form a mating groove 210 for matching the shape of the first mating part 20, such as... Figure 2 As shown, the first mating part 20 is annular, as... Figure 1 As shown, the mating groove 210 is also annular, and the first mating part 20 is positioned towards the mating groove 210 to absorb the heat radiated by the anode target 200. The second mating part 30 is used to fix itself to the bearing sleeve 410. Simultaneously, to ensure the heat dissipation device 100 is securely installed, the second mating part 30 is connected to the anode housing assembly 500 located outside the bearing sleeve 410. Heat from the anode target 200 is transferred to the heat dissipation device 100 through thermal radiation. Since the heat dissipation device 100 is fitted outside the copper sleeve 330 and connected to the bearing sleeve 410, it can absorb some of the heat from the rotor copper sleeve 300 and the bearing sleeve 410, preventing a significant increase in the internal temperature of the bearing 400.

[0052] The heat dissipation device 100 includes a first channel 13, which can be curved or straight. The first channel 13 is connected to the liquid inlet 34 or the liquid outlet 35. Figure 1 and Figure 4 As shown, the inlet 34 and outlet 35 are respectively located near the end of the bearing sleeve 410, facilitating connection between the inlet 34 and outlet 35 and the end cap 600 at the end of the bearing sleeve 410. The end cap 600 has an inlet cavity 610 corresponding to the inlet 34 and an outlet cavity 620 corresponding to the outlet 35. In use, the coolant flows sequentially through the inlet cavity 610 and inlet 34 through the first channel 13, and flows out from the outlet 35 and outlet cavity 620, carrying away the heat radiated by the anode target 200, as well as some of the heat from the rotor copper sleeve 300 and bearing sleeve 410, thereby significantly reducing the temperature of the anode target 200 and bearing 400. Figure 4 The diagram illustrates the flow direction of the coolant within the first channel 13, where the coolant can be a cooling liquid such as cooling oil.

[0053] Therefore, the heat dissipation device 100 according to the present invention can absorb the heat of the anode target 200, reduce the temperature of the anode target 200, and accelerate the cooling rate of the anode target 200; significantly reduce the heat radiated from the anode target 200 to the rotor copper sleeve 300; increase the heat radiated from the rotor copper sleeve 300 to the heat dissipation device 100, and improve the service life of the rotating anode assembly.

[0054] According to one embodiment of this utility model, the cooling jacket body 10 and the bearing sleeve 410 are coaxially arranged, such as... Figure 3 As shown, the cooling jacket body 10 includes a first sleeve 11 and a second sleeve 12.

[0055] Specifically, such as Figure 3 As shown, the first sleeve 11 defines the mounting cavity 14, as... Figure 4 As shown, the outer wall surface of the first sleeve 11 defines a plurality of strip-shaped first grooves 111 extending axially therefrom. Figure 3 As shown, the second sleeve 12 is sleeved on the first sleeve 11, and the inner wall surface of the second sleeve 12 cooperates with the first groove 111 to define the first channel 13.

[0056] In other words, the first sleeve 11 and the second sleeve 12 are circular tubes coaxially arranged with the bearing sleeve 410. The first sleeve 11 is used to fit onto the copper sleeve 330, and the second sleeve 12 is fitted onto the first sleeve 11. Multiple first grooves 111 are milled on the outer wall surface of the first sleeve 11. The first grooves 111 can be elongated or other shapes, and the multiple first grooves 111 are evenly spaced along the circumference of the outer wall surface of the first sleeve 11. The inner wall surface of the second sleeve 12 is in close contact with the outer wall surface of the first sleeve 11, so that the inner wall surface of the second sleeve 12 and the first grooves 111 on the first sleeve 11 define the first channel 13.

[0057] Preferably, the first mating part 20 is coaxially arranged with the bearing sleeve 410, such as... Figure 3 As shown, the first mating part 20 is defined with a plurality of second channels 23 communicating with the first channel 13. The first mating part 20 includes a first annular plate 21 and a second annular plate 22.

[0058] Specifically, such as Figure 4 As shown, the inner periphery of the first annular plate 21 is connected to one end of the first sleeve 11. One side of the first annular plate 21 faces the anode target 200, and the other side defines a plurality of U-shaped second grooves 211 with openings extending toward one end of the cooling sleeve body 10. The inner periphery of the second annular plate 22 is connected to one end of the second sleeve 12, and its outer periphery is connected to the outer periphery of the first annular plate 21. Figure 3 As shown, the second annular plate 22 is disposed on one side of the first annular plate 21, and one side of the second annular plate 22 cooperates with the second groove 211 to define the second channel 33. The end of the second channel 33 is connected to one end of the corresponding first channel 13.

[0059] In other words, such as Figures 2 to 4 As shown, the first mating part 20 mainly consists of two coaxially arranged annular plates. To mate with the first mating part 20, as... Figure 1 As shown, an annular mating groove 210, matching the shape of the first mating part 20, can be machined on the side of the anode target 200 facing the first mating part 20. The first mating part 20 is disposed within the mating groove 210. The first annular plate 21 is disposed adjacent to the anode target 200, as shown. Figure 3 and Figure 4The first annular plate 21 has multiple second grooves 211 milled on the side facing the second annular plate 22. The second annular plate 22 is set close to the first annular plate 21 and together with the first annular plate 21, defines multiple second channels 33. The shape of the second channel 33 mainly depends on the shape of the second grooves 211 on the first annular plate 21. When the second grooves 211 are U-shaped grooves, the second channels 33 are U-shaped curved channels. The U-shaped opening end of each second channel 33 is set facing the inner periphery of the first annular plate 21. One end of each U-shaped second channel 33 is connected to one end of a corresponding first channel 13, and the other end of each U-shaped second channel 33 is connected to one end of another corresponding first channel 13. Thus, each second channel 33 and the corresponding two first channels 13 form a coolant flow path. By setting the first mating part 20, the heat radiation of the anode target 200 can be absorbed, and the heat radiation and heat conduction of the anode target 200 to components such as the bearing 400 can be reduced.

[0060] In one embodiment of this utility model, the second mating part 30 is coaxially arranged with the bearing sleeve 410, such as... Figure 3 As shown, the second mating part 30 includes a third sleeve 31 and a fourth sleeve 32.

[0061] Specifically, the third sleeve 31 is sleeved on and connected to the bearing sleeve 410. The third sleeve 31 defines a plurality of third channels 33. One end of each third channel 33 extends to the outer wall of the third sleeve 31, and the other end communicates with the other end of the corresponding first channel 13. Figure 4 As shown, the other end extends to the end face of the other end of the third sleeve 31 to form a liquid outlet 35 or a liquid inlet 34. Figure 3 As shown, the fourth sleeve 32 is sleeved on the third sleeve 31. One end of the fourth sleeve 32 is connected to the other end of the second sleeve 12, and the other end is connected to the other end of the third sleeve 31.

[0062] In other words, the second mating part 30 is located at the other end of the cooling jacket body 10. The second mating part 30 is mainly used to integrate the liquid outlet 35 and the liquid inlet 34, and also serves to connect with the bearing sleeve 410 and the anode housing assembly 500. The third sleeve 31 is located at one end of the first sleeve 11, such as... Figure 3 As shown, the thickness of the third sleeve 31 is greater than that of the first sleeve 11, the inner diameter of the third sleeve 31 is smaller than that of the first sleeve 11, and the outer diameter is equal to that of the first sleeve 11. This not only facilitates defining the third channel 33 between the inner and outer walls of the third sleeve 31, but also facilitates matching the inner diameter of the third sleeve 31 with the outer diameter of the bearing sleeve 410, making it easier for the third sleeve 31 to be fitted onto the bearing sleeve 410. Figure 4As shown, the fourth sleeve 32 is fitted outside the third sleeve 31 to avoid exposing one end of the third channel 33.

[0063] Preferably, such as Figure 4 As shown, the liquid outlets 35 are evenly spaced along the end face of the other end of the third sleeve 31, and the liquid inlets 34 are evenly spaced along the end face of the other end of the third sleeve 31. The liquid outlets 35 are located outside the liquid inlets 34.

[0064] Specifically, the liquid outlet 35 is located on the outer ring, and the liquid inlet 34 is located on the inner ring, thus facilitating its interaction with the liquid inlet cavity 610 and the liquid outlet cavity 620 on the end cap 600. It should be noted that the liquid outlet 35 can also be located on the inner ring, and the liquid inlet 34 on the outer ring, while ensuring that the positions of the liquid inlet cavity 610 and the liquid outlet cavity 620 on the end cap 600 are adjusted accordingly.

[0065] Preferably, the first sleeve 11 and the third sleeve 31 are integrally formed parts; optionally, the second sleeve 12 and the fourth sleeve 32 are integrally formed parts; optionally, the second sleeve 12 and the second annular plate 22 are integrally formed parts.

[0066] According to one embodiment of the present invention, such as Figure 3 As shown, the first sleeve 11 and the third sleeve 31 are a whole, the second sleeve 12, the fourth sleeve 32 and the second annular plate 22 are a whole, and the entire heat dissipation device 100 is composed of the above two integrally formed parts and a first annular plate 21. The structure is simple and easy to process.

[0067] Optionally, one end of the first sleeve 11 is welded to the inner periphery of the first annular plate 21.

[0068] Optionally, the outer periphery of the first annular plate 21 is welded to the outer periphery of the second annular plate 22.

[0069] Optionally, the third sleeve 31 located at one end 31 of the end cap 600 and the fourth sleeve 32 located at one end of the end cap 600 are connected by welding.

[0070] Furthermore, the third sleeve 31 is welded to the bearing sleeve 410, and the fourth sleeve 32 is welded to the metal connection part of the anode housing assembly 500. The welded connection structure is stable and easy to process. The main body of the anode housing assembly 500 can be an anode glass shell or an anode ceramic shell.

[0071] In one embodiment of this utility model, the heat dissipation device 100 is blackened.

[0072] Specifically, the heat dissipation device 100 is a metal component. Iron oxide can be generated on the surface of the heat dissipation device 100 to form a black film, or titanium can be sprayed onto the surface of the heat dissipation device 100 to form a black film. The processing technology and composition of the black film are not limited to these methods. The black film can enhance the heat absorption of the rotor copper sleeve 300 by the heat dissipation device 100, thereby improving the heat dissipation capacity of the heat dissipation device 100.

[0073] Preferably, the anode target 200 defines a plurality of recesses or protrusions on the side facing the first mating portion 20, and the first mating portion 20 is formed as a bent structure that mates with the recesses or protrusions.

[0074] In other words, in order to increase the heat radiation area of ​​the anode target 200 and the heat dissipation device 100, an uneven structure can be provided on the anode target 200, and the first mating part 20 can also be configured as a folded shape that matches the uneven structure on the anode target 200.

[0075] According to one embodiment of the present invention, such as Figure 5 As shown, the anode target 200 is provided with multiple multi-layered annular structures coaxially arranged with the bearing 400. Correspondingly, the first mating part 20 is formed into a folded shape that matches the surface shape of the anode target 200. Thus, the anode target 200 and the first mating part 20 are nested together, increasing the heat dissipation area. Under the same working power, the temperature of the anode target 200 can be further reduced, and the heat radiated and conducted by the anode target 200 to the rotor copper sleeve 300 can also be reduced, thereby reducing the temperature of the bearing 400.

[0076] The X-ray tube according to the second aspect of the present invention includes the heat dissipation device 100 described in the above embodiment. The X-ray tube according to the present invention can be various types of X-ray tubes, CT tubes, etc. Since the heat dissipation device 100 according to the present invention has the function of absorbing the heat of the anode target 200, reducing the temperature of the anode target 200, reducing the temperature of the bearing 400, and improving the service life of the rotating anode assembly, the X-ray tube according to the present invention has the advantages of good heat dissipation and long service life.

[0077] Other components and operations of the X-ray tube according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0078] The CT device with an X-ray tube according to a third aspect embodiment of the present invention includes the X-ray tube described in the above embodiments. Since the X-ray tube according to the present invention has the advantages of good heat dissipation and long service life of the rotating anode assembly, the CT device with an X-ray tube according to the present invention also has the advantages of good heat dissipation and long service life.

[0079] Other components and operations of the CT device with X-ray tube according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0080] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A heat sink for use in a rotating anode assembly of a tube, said rotating anode assembly comprising an anode target, a rotor copper cup and a bearing, said bearing having a bearing cup, said bearing cup being connected to said anode target via the rotor copper cup, characterized in that, The heat dissipation device comprises: a cooling jacket body defining an installation cavity extending through the cooling jacket body in an axial direction, the cooling jacket body being arranged around the rotor copper jacket, the cooling jacket body defining a plurality of first channels for cooling liquid flow; a first fitting part connected to one end of the cooling jacket body for fitting with the anode target; a second fitting part connected to the other end of the cooling jacket body for fitting with the bearing sleeve, the second fitting part being provided with a plurality of liquid inlets and liquid outlets in communication with the first channels.

2. The heat dissipating device according to claim 1, wherein The cooling jacket body is coaxially arranged with the bearing sleeve, and the cooling jacket body comprises: a first sleeve defining the installation cavity, an outer wall surface of the first sleeve defining a plurality of strip-shaped first grooves extending in the axial direction; a second sleeve arranged around the first sleeve, and an inner wall surface of the second sleeve being fitted with the first grooves to define the first channels.

3. The heat dissipating device of claim 2, wherein The first fitting part is coaxially arranged with the bearing sleeve, and the first fitting part defines a plurality of second channels in communication with the first channels, the first fitting part comprising: a first annular plate, an inner periphery of the first annular plate being connected to one end of the first sleeve, one side of the first annular plate being arranged towards the anode target, and the other side of the first annular plate defining a plurality of U-shaped second grooves extending towards one end of the cooling jacket body; a second annular plate, an inner periphery of the second annular plate being connected to one end of the second sleeve, and an outer periphery of the second annular plate being connected to an outer periphery of the first annular plate, the second annular plate being arranged on one side of the first annular plate, and one side of the second annular plate being fitted with the second grooves to define the second channels, end portions of the second channels being in communication with one end of the corresponding first channels.

4. The heat dissipating device according to claim 3, wherein The second fitting part is coaxially arranged with the bearing sleeve, and the second fitting part comprising: a third sleeve arranged around the bearing sleeve and fitted with the bearing sleeve, the third sleeve defining a plurality of third channels, one end of the third channels extending to an outer wall surface of the third sleeve and being in communication with the other end of the corresponding first channels, and the other end of the third channels extending to an end surface of the other end of the third sleeve to form the liquid outlets or the liquid inlets; a fourth sleeve arranged around the third sleeve, one end of the fourth sleeve being connected to the other end of the second sleeve, and the other end of the fourth sleeve being connected to the other end of the third sleeve.

5. The heat dissipating device of claim 4, wherein The liquid outlets are uniformly and evenly distributed along the end surface of the other end of the third sleeve, the liquid inlets are uniformly and evenly distributed along the end surface of the other end of the third sleeve, and the liquid outlets are located outside the liquid inlets.

6. The heat dissipating device of claim 4, wherein The first sleeve and the third sleeve are integrally formed; and / or, The second sleeve and the fourth sleeve are integrally formed; and / or, The second sleeve and the second annular plate are integrally formed; and / or, The first sleeve and the first annular plate are welded; and / or, The first annular plate and the second annular plate are welded; and / or, The third sleeve and the fourth sleeve are welded; and / or, The third sleeve and the bearing sleeve are welded.

7. The heat dissipating device of claim 1, wherein The heat dissipation device is subjected to blackening treatment.

8. The heat dissipating device of claim 1, wherein, The side of the anode target facing the first fitting part is defined with a plurality of recesses or protrusions, and the first fitting part is formed as a bent structure matched with the recesses or the protrusions.

9. A ray tube characterized by The heat dissipation device comprises the heat dissipation device according to any one of claims 1-8.

10. A CT apparatus having a ray tube, characterized by comprising: The ray tube comprises the ray tube according to claim 9.

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