X-ray generating device and imaging equipment

Abstract

The present disclosure provides an X-ray generating device and an imaging device, wherein the X-ray generating device comprises: a housing; a heat conductor, the heat conductor is arranged through the housing, and the heat conductor has a through channel inside, and the through channel is used to circulate a cooling medium; an anode target, the anode target is used to receive electron bombardment to generate X-rays, and the anode target is arranged in the housing and rotatably sleeved outside the heat conductor. The present disclosure also provides an imaging device, including a cooling system and an X-ray generating device, the cooling system is connected to both ends of the heat conductor, and the cooling system is used to transport a cooling medium into the heat conductor. In the X-ray generating device and the imaging device provided by the present disclosure, the cooling medium can take away the heat at the anode target through the through channel, thereby improving the heat dissipation efficiency and service life of the X-ray generating device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of X-ray imaging, and in particular to an X-ray generating device and an imaging device. Background Art

[0002] X-rays have the advantages of short wavelength, high energy, and strong penetrating power, and are therefore widely used in medical imaging equipment. At present, the X-ray generating device in the relevant technology includes an anode target and a cathode. The cathode filament is energized to generate thermal electrons. Driven by the high voltage at both ends of the cathode and anode, the electrons move at high speed and hit the anode target surface, radiating and generating X-rays. The X-rays are emitted through the window, and only less than 1% of the energy carried by the high-speed electrons is converted into X-ray energy, and the rest is all converted into heat energy. Summary of the invention

[0003] A first aspect of an embodiment of the present disclosure provides an X-ray generating device, comprising: a housing; a heat conductor, the heat conductor is arranged to penetrate the housing, and the heat conductor has a through channel inside, the through channel is used to circulate a cooling medium; an anode target, the anode target is used to receive electron bombardment to generate X-rays, the anode target is arranged in the housing and is rotatably mounted outside the heat conductor.

[0004] A second aspect of an embodiment of the present disclosure provides an imaging device, including a cooling system and an X-ray generating device as described above, wherein the cooling system is connected to both ends of a heat conducting member of the X-ray generating device, and the cooling system is used to transport a cooling medium into the heat conducting member.

[0005] The X-ray generating device provided by the embodiment of the present disclosure improves the heat dissipation efficiency of the X-ray generating device and improves the service life of the X-ray generating device by arranging a heat conductive member to penetrate the anode target and the outer shell, and a through channel is arranged inside the heat conductive member, so that the cooling medium can take away the heat at the anode target through the through channel.

[0006] The imaging device provided by the embodiment of the present disclosure has an X-ray generating device with high heat dissipation efficiency, which improves the working stability and service life of the imaging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings so that the above and other features and advantages of the present disclosure will be more apparent to those skilled in the art. In the accompanying drawings:

[0008] Figure 1 is a schematic structural diagram of an X-ray generating device according to an exemplary embodiment of the present disclosure as viewed from the X-ray emission side;

[0009] Figure 2 is a schematic structural diagram of an X-ray generating device according to an exemplary embodiment of the present disclosure as viewed from a side opposite to the X-ray emitting side;

[0010] Figure 3 is a front view of an X-ray generating device according to an exemplary embodiment of the present disclosure;

[0011] Figure 4 for Figure 3 Middle AA section view;

[0012] Figure 5 for Figure 4 A partial enlarged view of

[0013] Figure 6 for Figure 4 Schematic diagram of heat dissipation of the X-ray generating device;

[0014] Figure 7 is a schematic structural diagram of an X-ray generating device viewed from the X-ray emission side according to another exemplary embodiment of the present disclosure;

[0015] Figure 8 is a schematic structural diagram of an X-ray generating device viewed from a side opposite to the X-ray emitting side according to another exemplary embodiment of the present disclosure;

[0016] Fig. 9 is a front view of an X-ray generating device according to another exemplary embodiment of the present disclosure;

[0017] Fig.10 for Fig. 9 Middle BB section view;

[0018] Fig.11 for Fig.10 Schematic diagram of heat dissipation of the X-ray generating device;

[0019] Fig.12 is a schematic structural diagram of an X-ray generating device according to another exemplary embodiment of the present disclosure as viewed from the X-ray emitting side;

[0020] Fig.13 is a schematic structural diagram of an X-ray generating device according to another exemplary embodiment of the present disclosure viewed from a side opposite to the X-ray emitting side;

[0021] Fig.14 is a front view of an X-ray generating device according to another exemplary embodiment of the present disclosure;

[0022] Fig.15 for Fig.14 Middle CC section view;

[0023] Fig.16 for Fig.15 Schematic diagram of heat dissipation of the X-ray generating device.

[0024] The reference numerals are as follows:

[0025] 100: housing; 110: casing;

[0026] 111: bottom wall; 112: side wall;

[0027] 120: cover body; 121: first transparent portion;

[0028] 122: second transmission part; 130: anode glass shell;

[0029] 131: anode glass shell body; 132: first anode kovar ring;

[0030] 133: second anode kovar ring; 140: cathode glass shell;

[0031] 141: cathode glass shell body; 142: first cathode kovar ring;

[0032] 143: second cathode kovable ring; 200: heat conducting member;

[0033] 210: through passage; 220: first bearing;

[0034] 230: first connecting member; 240: second bearing;

[0035] 250: second connecting member; 260: third bearing;

[0036] 270: first paragraph; 280: second paragraph;

[0037] 290: transition section; 300: anode target;

[0038] 310: first surface; 400: first cathode;

[0039] 410: Ceramic core column; 420: Cathode shielding tube;

[0040] 430: cathode plate; 440: cathode head;

[0041] 450: lead wire; 500: rotor;

[0042] 600: second cathode; 700: exhaust pipe;

[0043] 800: Insulation; 810: Intermediate;

[0044] 820: first sealing ring; 830: second sealing ring. DETAILED DESCRIPTION

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the present disclosure, specific embodiments of the present disclosure are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0046] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or embodiment described as “exemplary” in this document should not be interpreted as a more preferred or more advantageous technical solution.

[0047] In order to simplify the drawings, only the parts related to the present disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0048] In this article, "one" not only means "only one", but also means "more than one". In this article, "first", "second", etc. are only used to distinguish each other, rather than to indicate their importance and order, or the premise of each other's existence.

[0049] X-rays have the advantages of short wavelength, high energy, and strong penetrating power, and are therefore widely used in medical imaging equipment. Usually, X-rays are generated by high-speed electrons bombarding a rotating anode target. Since less than 1% of the energy carried by high-speed electrons is converted into X-ray energy, the rest is converted into heat energy, so a large amount of heat is generated during the generation of X-rays. If the heat cannot be dissipated in time, the anode target will be broken down and melted.

[0050] At present, in the related technology, an X-ray generating device includes a device housing and an anode made of metal. The anode is rotatably arranged in the device housing, and a bearing is arranged between the anode and the device housing. The inner ring of the bearing is connected to the anode, the outer ring of the bearing is connected to the device housing, and a ball is arranged between the inner ring and the outer ring of the bearing.

[0051] When the anode rotates at high speed, the heat dissipation mainly relies on the anode radiating heat outward and transferring the heat to the device housing through contact heat conduction between the bearing balls and the inner and outer rings of the bearing.

[0052] However, due to the slow speed of heat radiation conduction and the small contact area between the ball and the inner and outer rings of the bearing, the heat generated by the bearing is relatively small. Therefore, the heat dissipation method in the related technology is inefficient and it is difficult to immediately remove the heat generated on the anode, affecting the service life of the X-ray generating device.

[0053] In order to solve the above problems, the embodiments of the present disclosure provide an X-ray generating device and an imaging device, which improves the heat dissipation efficiency of the X-ray generating device and improves the service life of the X-ray generating device by arranging a heat conducting member for circulating a cooling medium inside the anode target. The present disclosure will be explained in detail below in conjunction with specific embodiments.

[0054] Figure 1 is a schematic structural diagram of an X-ray generating device according to an exemplary embodiment of the present disclosure as viewed from the X-ray emission side; Figure 2 is a schematic structural diagram of an X-ray generating device according to an exemplary embodiment of the present disclosure as viewed from a side opposite to the X-ray emitting side; Figure 3 is a front view of an X-ray generating device according to an exemplary embodiment of the present disclosure; Figure 4 for Figure 3 AA section view. Please refer to Figures 1 to 4 An embodiment of the present disclosure provides an X-ray generating device for generating X-rays. The X-ray generating device includes: a housing 100 , a heat conductor 200 , an anode target 300 and a first cathode 400 .

[0055] The housing 100 is a main component for accommodating the heat conductor 200 , the first cathode 400 and the anode target 300 , and its structure can be various. For example, the shape of the housing 100 can be cylindrical or spherical. For another example, the shape of the housing 100 can be rectangular.

[0056] In some embodiments, the housing 100 may include a housing 110 and a cover 120. The housing 110 includes a bottom wall 111 and a side wall 112 connected to the bottom wall 111, and the bottom wall 111 and the side wall 112 together form a receiving cavity with an opening; the cover 120 covers the opening, and the cover 120 is arranged opposite to the bottom wall 111.

[0057] The bottom wall 111 may be a plate-like structure, the side wall 112 is located on one side of the bottom wall 111, and the side wall 112 may extend along the edge of the bottom wall 111 to form a ring-like structure. There may be a variety of ways to connect the bottom wall 111 and the side wall 112, for example, the bottom wall 111 and the side wall 112 may be connected together by welding, riveting or screwing, or the bottom wall 111 and the side wall 112 may be integrally formed by casting, extrusion molding or stamping. Optionally, the bottom wall 111 and the side wall 112 may be made of a metal material with good rigidity, so as to support and protect the internal structure thereof.

[0058] The bottom wall 111 and the side wall 112 form a receiving cavity with an opening, which can be located at a position opposite to the bottom wall 111. The anode target 300 can be located in the receiving cavity, and the first cathode 400 can be connected to the side wall 112; the heat conductor 200 and at least part of the structure of the first cathode 400 are also located in the receiving cavity.

[0059] In order to achieve sealing of the housing 100, a cover 120 may be provided at the opening, and the bottom wall 111 may be arranged opposite to the cover 120. The cover 120 may also be made of a metal material, and the cover 120 may be fixedly connected to the side wall 112 by welding such as brazing. Optionally, a step structure may be provided at the edge of the side wall 112 near the opening, and the cover 120 may be engaged in the step structure, thereby achieving positioning of the cover 120, and facilitating installation and fixing of the cover 120.

[0060] The housing 100 has a first transparent portion 121, which is a window for X-rays to exit the housing 100, and can be made of titanium or titanium alloy. The first transparent portion 121 can have a variety of shapes, such as a circle or a square, and can be set according to actual conditions. It can be understood that the emission direction of the X-rays is the direction from the anode target 300 to the first transparent portion 121, that is, Figure 4 In the direction from right to left.

[0061] Optionally, the first transparent portion 121 can be disposed on the cover 120, and the cover 120 has a mounting hole, and the first transparent portion 121 can be installed in the mounting hole. In some embodiments, when the cover 120 is made of metal, the first transparent portion 121 can be welded and fixed to the cover 120 by welding methods such as brazing. In some embodiments, the cover 120 can also be provided with a step structure for positioning the first transparent portion 121.

[0062] The housing 100 provided in the embodiment of the present disclosure has a simple structure and is easy to process, and the X-ray generating device has a reasonable layout and a compact structure.

[0063] The anode target 300 is a main component for generating X-rays, which can be used to receive the bombardment of electrons to generate X-rays emitted from the housing 100. The anode target 300 can be arranged in the housing 100, and the anode target 300 can rotate at a high speed relative to the housing 100. The anode target 300 can be made of a common material capable of generating X-rays, such as molybdenum, rhodium, tungsten, or an alloy containing at least one of them.

[0064] In some embodiments, the anode target 300 has a first surface 310 for receiving electron bombardment, and the outer circumference of the first surface 310 in the cross section gradually decreases along the emission direction of the X-rays, that is, the outer circumference of the first surface 310 in the cross section gradually decreases from the end away from the first transparent portion 121 to the end close to the first transparent portion 121. In other words, the anode target 300 gradually shrinks along the emission direction of the X-rays, and an inclination angle is formed between the electron beam emitted by the first cathode 400 and the anode target 300, so that the electron (beam) bombards the anode target 300 rotating at a high speed, generates X-rays, and guides the X-rays to be emitted from the housing 100 through the first transparent portion 121. The first surface 310 can be a conical or truncated cone outer surface, which can make the generated X-rays emit from the housing 100 toward the first transparent portion 121, thereby increasing the emission amount of X-rays.

[0065] The first cathode 400 is connected to the housing 100, and the first cathode 400 is arranged corresponding to the anode target 300. Optionally, the first cathode 400 is arranged on the side wall 112, and at least a portion of the first cathode 400 extends into the accommodating cavity and is located at a position corresponding to the anode target 300, so that electrons can more easily bombard the anode target 300. The first cathode 400 can be used to gather electrons, and it can include a filament, etc. When the first cathode 400 is powered on, the filament is powered on, and a large number of electrons gather at the first cathode 400. When a high-voltage electric field exists between the first cathode 400 and the anode target 300, the electrons move toward the anode target 300 and bombard the anode target 300 rotating at a high speed, generating X-rays, which are emitted from the housing 100 through the first transparent portion 121.

[0066] The specific structure of the first cathode 400 can be various. Figure 5 , Figure 5 for Figure 4 , in some embodiments, the first cathode 400 may include: a ceramic core column 410, a cathode shielding tube 420, a cathode flat plate 430, and a cathode head 440. The cathode shielding tube 420 may pass through the side wall 112, the cathode flat plate 430 and the cathode head 440 are fixed at one end of the cathode shielding tube 420, the ceramic core column 410 is fixed at the other end of the cathode shielding tube 420, and the cathode flat plate 430 and the cathode head 440 are located in the accommodating cavity, and the ceramic core column 410 is located outside the accommodating cavity.

[0067] The ceramic core column 410 may be made of ceramic with good electrical insulation performance, and a lead wire 450 may be sealed in the middle of the ceramic core column 410. The number of the lead wires 450 may be multiple, and the ceramic core column 410 may be used to fix and insulate the multiple lead wires 450. It is understood that the multiple lead wires 450 may include a cathode lead for energizing the filament, and a metal lead for setting a getter. The ceramic core column 410 is not easy to age, is resistant to high voltage and high temperature, and can improve the electromechanical properties of the cathode lead wire.

[0068] The ceramic core column 410 can be fixed on the cathode shielding tube 420. There are many ways to connect the two. For example, a first metal ring can be provided at the bottom of the ceramic core column 410, and the first metal ring can be fixedly connected to the cathode shielding tube 420 by a fixing method such as spot welding. The cathode shielding tube 420 can be made of a metal material with good temperature resistance, and a plurality of lead wires 450 can be arranged through the cathode shielding tube 420. The cathode shielding tube 420 can be used to shield the lead wires 450. A degassing agent can be arranged on the metal lead wires in the cathode shielding tube 420. The degassing agent can absorb the gas excited by the X-ray generator in the working state, and reduce the gas concentration in the X-ray generator to a minimum, thereby improving the vacuum degree, avoiding the ignition problem, and improving the stability of the X-ray generator.

[0069] The cathode flat plate 430 may be a flat plate structure, and may also be made of a metal with good temperature resistance. The cathode flat plate 430 may be fixed to the bottom of the cathode shielding cylinder 420 by brazing or argon arc welding. The cathode flat plate 430 may have a variety of shapes, such as round, square, etc., and may be specifically set according to actual conditions.

[0070] The cathode head 440 can be arranged at one end of the cathode plate 430 away from the cathode shielding tube 420. For example, the cathode head 440 can be fixed to the cathode plate 430 by brazing or other fixing methods. The cathode head 440 can be made of a metal with good temperature resistance. The cathode head 440 can be arranged corresponding to the anode target 300, and a filament can be arranged thereon, so that the cathode head 440 can be used to focus electrons.

[0071] It is understood that in order to allow a large number of electrons gathered by the first cathode 400 to bombard the anode target 300 at high speed, a vacuum environment can be formed in the housing 100 to reduce the collision between the electrons and the gas. In some embodiments, a cathode glass shell 140 can be further provided outside the housing 100, and the cathode glass shell 140 can be connected to the ceramic core column 410, so that the first cathode 400 is placed in a vacuum environment.

[0072] The cathode glass shell 140 may include a cathode glass shell body 141, a first cathode kovar ring 142 and a second cathode kovar ring 143. The cathode glass shell body 141 may be made of glass or ceramic, and may be sleeved outside the cathode shielding tube 420. The top of the cathode glass shell body 141 may be provided with a first cathode kovar ring 142, and the first cathode kovar ring 142 may be made of kovar alloy, which may serve as a transition metal for connecting the cathode glass shell body 141 with a metal material. The top outer ring of the ceramic core column 410 may be provided with a second metal ring, and the first cathode kovar ring 142 may be welded and sealed with the second metal ring, and then fixedly connected with the ceramic core column 410.

[0073] The second cathode kovar ring 143 is disposed at the bottom of the cathode glass shell body 141. The second cathode kovar ring 143 may also be made of kovar alloy, which may be used as a transition metal for connecting the cathode glass shell body 141 with the housing 100. Optionally, a connection hole may be provided on the side wall 112 of the housing 100, and the cathode shielding cylinder 420 may pass through the connection hole. The edge of the hole wall of the connection hole may form a step structure, and the second cathode kovar ring 143 may be fixedly connected to the step structure by a fixing method such as argon arc welding.

[0074] Continue to refer to Figure 4 and Figure 5 Since a large amount of heat is generated during the generation of X-rays, in order to prevent the anode target 300 from being broken down and melted, the X-ray generating device is further provided with a heat conductor 200. The heat conductor 200 is arranged through the housing 100, and the anode target 300 is rotatably sleeved outside the heat conductor 200. The heat conductor 200 has a through channel 210 inside, and the through channel 210 is used to circulate the cooling medium.

[0075] Optionally, a central through hole is formed inside the anode target 300 , and the inner dimension of the central through hole may be larger than the outer dimension of the heat conductor 200 , so that the heat conductor 200 can pass through the anode target 300 .

[0076] The heat conducting member 200 may be a thin-walled tubular structure, which may extend along the rotation axis direction of the anode target 300. A through channel penetrating the heat conducting member 200 is formed inside the heat conducting member 200, and the extension direction of the through channel 210 is consistent with the extension direction of the heat conducting member 200. A cooling medium such as water, oil, and air that can be used for cooling may flow through the through channel 210. The heat conducting member 200 may be made of a metal material with good thermal conductivity. When the cooling medium flows through the through channel 210, the heat generated at the anode target 300 may be brought out of the housing 100 in a timely manner.

[0077] In some embodiments, two opposite through holes may be provided on the outer shell 100, a through hole may be provided on the cover body 120, and a through hole may be provided on the bottom wall 111. The heat conductive member 200 may be located inside the outer shell 100, and both ends may pass through the two through holes respectively, so that the heat conductive member 200 passes through the cover body 120 and the bottom wall 111.

[0078] In some embodiments, the heat conducting member 200 may be fixed to the housing 100. Optionally, an insulating member 800 may be fixed between the through hole wall of the cover 120 and the heat conducting member 200, and the insulating member 800 may include a first sealing ring 820, an intermediate body 810, and a second sealing ring 830. The first sealing ring 820 may be sleeved and fixed outside the heat conducting member 200, for example, the first sealing ring 820 may be a metal sealing ring, which may be welded to the heat conducting member 200. The second sealing ring 830 is sleeved outside the first sealing ring 820, and the intermediate body 810 is located between the first sealing ring 820 and the second sealing ring 830.

[0079] The second sealing ring 830 can also be a metal sealing ring, which is fixedly connected to the cover body 120. For example, the edge of the through hole of the cover body 120 forms a convex edge protruding outward, and the inner surface of the convex edge can be attached to the outer surface of the second sealing ring 830, and the two are fixed to each other by argon arc welding or the like.

[0080] The intermediate body 810 may be an annular body made of insulating materials such as ceramics, and the intermediate body 810 may be welded between the outer surface of the first sealing ring 820 and the inner surface of the second sealing ring 830. The insulating member 800 may not only fix the heat pipe 200 and the housing 100, but also achieve insulation and sealing between the two.

[0081] The other end of the heat conductive member 200 away from the insulating member 800 may also be fixedly connected to the housing 100 through an anode glass shell 130. Optionally, the anode glass shell 130 includes an anode glass shell body 131, a first anode kovar ring 132 and a second anode kovar ring 133. The anode glass shell body 131 may be made of glass or ceramic, which may be sleeved on the outside of the heat conductive member 200. The anode glass shell body 131 may be a trumpet-shaped structure.

[0082] The left end of the anode glass shell body 131 may be provided with a first anode kovar ring 132, which may be made of kovar alloy, and may serve as a transition metal for connecting the anode glass shell body 131 with the bottom wall 111. Optionally, the edge of the hole wall of the through hole of the bottom wall 111 may form a step structure, and the first anode kovar ring 132 may be fixedly connected to the step structure by a fixing method such as brazing.

[0083] The second anode kovar ring 133 is disposed at the right end of the anode glass shell body 131 . The second anode kovar ring 133 may also be made of kovar alloy, which may serve as a transition metal for connecting the anode glass shell body 131 with the heat conducting member 200 .

[0084] The anode glass shell 131 can not only fix the heat conducting member 200 and the outer shell 100 , but also seal the heat conducting member 200 and the outer shell 100 , thereby forming a vacuum containing cavity.

[0085] In some embodiments, in order to ensure that the accommodating chamber is always in a vacuum, an exhaust pipe 700 may be provided on the housing 100 , and the exhaust pipe 700 may be connected to a vacuum pump to form a vacuum in the accommodating chamber. Optionally, the exhaust pipe 700 may be provided on the cover 120 .

[0086] The rotation of the anode target 300 relative to the heat conducting member 200 can be achieved by means of a bearing structure. Figure 4 In some embodiments, a first bearing 220 is sleeved on the heat conductive member 200, the first bearing 220 is located at the first end of the anode target 300, and the inner ring of the first bearing 220 is fixedly connected to the heat conductive member 200, and the outer ring of the first bearing 220 is fixedly connected to the anode target 300. The first bearing 220 can realize the connection between the heat conductive member 200 and the anode target 300, and the heat generated by the first bearing 220 can be taken away by the heat conductive member 200, further improving the heat dissipation of the X-ray generating device.

[0087] The first bearing 220 may be a common bearing structure, such as a deep groove ball bearing, a cylindrical roller bearing, an angular contact ball bearing, a self-aligning ball bearing, etc. The first bearing 220 may be disposed at one end of the anode target 300 along the direction of its rotation axis, and may be Figure 4 The left or right end of the .

[0088] The inner ring of the first bearing 220 can be fixedly connected to the heat conductor 200 by common fixing methods such as welding, riveting, key connection, etc. Optionally, the heat conductor 200 can be directly processed into a form that replaces the inner ring of the first bearing 220, that is, the rolling element of the first bearing 220 can be directly arranged between the heat conductor 200 and the outer ring. The outer ring of the first bearing 220 can be fixedly connected to the anode target 300. For example, the end face of the outer ring of the first bearing 220 can be fixedly connected to the left end face or the right end face of the anode target 300 by welding or the like. It can be understood that the anode target 300 is connected to the heat conductor 200 by relying on the first bearing 220. There is no direct contact between the anode target 300 and the heat conductor 200, and there can be a gap between the two. The size of the gap can be set to a smaller size, so that the anode target 300 can be infinitely close to the heat conductor 200 to improve the heat dissipation effect. At the same time, the existence of the gap can eliminate the friction resistance between the anode target 300 and the heat conductor 200 when rotating, thereby improving the rotation speed of the anode target 300.

[0089] Optionally, a first connector 230 is provided between the anode target 300 and the first bearing 220. The first connector 230 may be a circular sheet structure. The first connector 230 is sleeved outside the heat conducting member 200, and one side of the first connector 230 is fixedly connected to the end face of the anode target 300, and the other side of the first connector 230 is fixedly connected to the outer ring of the first bearing 220. The diameter of the first connector 230 may be greater than the diameter of the first bearing 220.

[0090] As an optional connection method, the first connecting member 230 can be fixedly connected to the anode target 300 by screws, and the number of screws can be multiple, and the multiple screws can be arranged at intervals along the circumferential direction of the anode target 300. The other side of the first connecting member 230 can be fixedly connected to the end face of the outer ring of the first bearing 220 by welding or integral molding or other processing methods.

[0091] By connecting the anode target 300 and the first bearing 220 through the first connecting member 230 , the fixing area of ​​the anode target 300 can be increased, the fixing effect can be improved, and at the same time, the anode target 300 can be easily disassembled or replaced.

[0092] It is understood that, in some embodiments, only one first bearing 220 may be provided on the heat conducting member 200. The first bearing 220 may be provided at the left end of the anode target 300 or at the right end of the anode target 300. In other optional embodiments, the heat conducting member 200 may be provided with a plurality of bearings.

[0093] For example, continue to refer to Figure 4, the heat conducting member 200 is also provided with a second bearing 240, the second bearing 240 is located at the second end of the anode target 300 away from the first bearing 220, and the inner ring of the second bearing 240 is fixedly connected to the heat conducting member 200, and the outer ring of the second bearing 240 is fixedly connected to the anode target 300. That is, in this embodiment, the heat conducting member 200 is provided with two bearings, namely the first bearing 220 and the second bearing 240, and the first bearing 220 and the second bearing 240 are respectively connected to the two ends of the anode target 300.

[0094] Taking the example that the first bearing 220 is located at the right end of the anode target 300 and the second bearing 240 is located at the left end of the anode target 300, the left end face of the outer ring of the first bearing 220 can be fixedly connected to the right end face of the anode target 300, and the right end face of the outer ring of the second bearing 240 can be fixedly connected to the left end face of the anode target 300. The specific connection method between the second bearing 240 and the heat conductor 200 or the anode target 300 can refer to the connection method between the first bearing 220 and the heat conductor 200 or the anode target 300, which will not be repeated here. The first bearing 220 and the second bearing 240 can simultaneously play the role of supporting the anode target 300, and the force of the anode target 300 is balanced, which can reduce the noise generated by the rotation of the anode target 300 and improve the stability of the rotation of the anode target 300.

[0095] In some embodiments, a second connector 250 is provided between the anode target 300 and the second bearing 240, the second connector 250 is sleeved outside the heat conductive member 200, and one side of the second connector 250 is fixedly connected to the end surface of the anode target 300, and the other side of the second connector 250 is fixedly connected to the outer ring of the second bearing 240. The diameter of the second connector 250 may be greater than the diameter of the second bearing 240.

[0096] Optionally, the second connecting member 250 can be fixedly connected to the anode target 300 by screws, the number of screws can be multiple, and the multiple screws can be arranged at intervals along the circumferential direction of the anode target 300. The other side of the second connecting member 250 can be fixedly connected to the end face of the outer ring of the second bearing 240 by welding or integral molding or other processing methods.

[0097] By connecting the anode target 300 and the second bearing 240 through the second connecting member 250 , the fixing area of ​​the anode target 300 can be increased, the fixing effect can be improved, and at the same time, the anode target 300 can be easily disassembled or replaced.

[0098] It is understandable that the second bearing 240 can be a common bearing structure, such as a deep groove ball bearing, a cylindrical roller bearing, an angular contact ball bearing, a self-aligning ball bearing, etc. The type of the first bearing 220 can be the same as that of the second bearing 240, or it can be different. Optionally, the first bearing 220 is a double-row bearing, and the second bearing 240 is a single-row bearing. The first bearing 220, the anode target 300 and the second bearing 240 are arranged in sequence along the emission direction of the X-ray, that is, the first bearing 220 is located at the end of the anode target 300 away from the first transparent portion 121. Among them, the single-row bearing is a bearing structure with only one set of rollers, and the double-row bearing is a bearing structure with two sets of rollers, and the two sets of rollers can be arranged at intervals along the axial direction of the first bearing 220. The single-row bearing can reduce the production cost, and the double-row bearing can facilitate the setting of the rotor 500, thereby driving the anode target 300 to rotate.

[0099] In some embodiments, in order to realize high-speed rotation of the anode target 300, the X-ray generating device further includes a rotor 500. The rotor 500 is sleeved outside the first bearing 220, and the rotor 500 is fixedly connected to the outer ring of the first bearing 220. The rotor 500 may be a common rotor structure, for example, it may be a magnetic metal ring; the rotor 500 may cooperate with the stator to form a driving motor structure of an outer stator and an inner rotor. The stator may be a structure such as a stator coil, which may be arranged outside the housing 100. Optionally, the stator may be sleeved outside the anode glass shell 130. The rotor 500 may be fixed to the outer ring of the first bearing 220. When the stator is energized, the rotor 500 may be driven to rotate at a high speed to drive the outer ring of the first bearing 220 to rotate relative to the inner ring of the first bearing 220, thereby driving the anode target 300 to rotate relative to the heat conducting member 200.

[0100] In some embodiments, the X-ray generating device can simplify the driving structure of the anode target 300 by disposing the rotor 500 on the outer ring of the first bearing 220 , so that the anode target 300 can rotate at a high speed relative to the heat conductor 200 .

[0101] Figure 6 for Figure 4 Heat dissipation diagram of the X-ray generator. Figure 6When the X-ray generating device is working, the rotor 500 drives the anode target 300 to rotate at a high speed; the first cathode 400 is energized, and a large number of electrons are gathered on it. The electrons bombard the anode target 300 under the action of the high voltage electric field and generate X-rays, which are emitted from the housing 100 through the first transparent part 121. At the same time, since a large amount of energy is converted into heat energy during the generation of X-rays, a large amount of heat is gathered on the anode target 300. The coolant flowing in the heat conductor 200 can take away the heat on the anode target 300, timely reduce the temperature of the anode target 300, avoid the anode target 300 from being broken down and melted, and avoid the phenomenon of ignition in the tube and cracking of insulating oil caused by the excessive temperature of the anode target 300, thereby improving the working stability and service life of the X-ray generating device. In addition, since the through channel 210 of the heat conductor 200 is a straight-through structure, the cooling passage structure is simple, the flow rate of the cooling medium can be increased, and the cooling effect is good.

[0102] It is understandable that in the related art, the heat dissipation of the anode mainly relies on the heat radiated outward by the anode target and the contact heat conduction between the ball of the bearing and the inner and outer rings of the bearing. According to some embodiments of the present disclosure, the heat of the anode target 300 can be dissipated by the heat conductor 200 that penetrates the anode target 300. Since the gap between the heat conductor 200 and the anode target 300 is very small, the heat can be radiated to the heat conductor 200 relatively quickly and taken away by the cooling medium in the heat conductor 200, so that the anode target 300 can be continuously dissipated, thereby improving the heat dissipation effect of the anode target 300. In addition, the first bearing 220 and the second bearing 240 can also realize contact heat conduction, and the heat of the anode target 300 is conducted to the heat conductor 200. At the same time, the cooling medium flowing in the heat conductor 200 can promptly take away the heat on the first bearing 220 and the second bearing 240, further improving the heat dissipation effect, and increasing the service life of the first bearing 220 and the second bearing 240.

[0103] It should be noted that Figure 6 The flow direction of the cooling medium is from right to left. In other optional embodiments, the cooling medium may also flow from left to right. In addition, in the above description, the nouns indicating the orientation, such as top, bottom, left, and right, are based on the orientation in the accompanying drawings and should not be used to limit the present application. In other views or orientations, the orientations of top, bottom, left, and right can be adaptively changed.

[0104] Figure 7 is a schematic structural diagram of an X-ray generating device viewed from the X-ray emission side according to another exemplary embodiment of the present disclosure; Figure 8 is a schematic structural diagram of an X-ray generating device viewed from a side opposite to the X-ray emitting side according to another exemplary embodiment of the present disclosure; Fig. 9 is a front view of an X-ray generating device according to another exemplary embodiment of the present disclosure; Fig.10 for Fig. 9 Middle BB section view. Please refer to Figures 7 to 10 , in reference Figures 1 to 5 Based on the above embodiment, the connection method between the anode target 300 and the heat conductor 200 is improved, and other structures not described in detail are similar to those in the reference Figures 1 to 5 The embodiments described are the same or similar, and the specific references can be made to the above references. Figures 1 to 5 The described embodiments will not be described in detail here.

[0105] Reference Fig.10 In some embodiments, a third bearing 260 is provided between the anode target 300 and the heat conductor 200 , and the outer ring of the third bearing 260 is fixedly connected to the inner surface of the anode target 300 , and the inner ring of the third bearing 260 is fixedly connected to the outer surface of the heat conductor 200 .

[0106] The third bearing 260 may be a common bearing structure, such as a deep groove ball bearing, a cylindrical roller bearing, an angular contact ball bearing, a self-aligning ball bearing, etc. The third bearing 260 may be disposed between the surfaces opposite to the anode target 300 and the heat conductor 200. The inner ring of the third bearing 260 may be fixedly connected to the heat conductor 200 by common fixing methods such as welding, riveting, and key connection. The outer ring of the third bearing 260 may also be fixedly connected to the inner surface of the anode target 300 by common fixing methods such as welding, riveting, and key connection.

[0107] Optionally, the heat conductor 200 can be directly processed to replace the inner ring of the third bearing 260, that is, the rolling element of the third bearing 260 can be directly arranged between the heat conductor 200 and the outer ring. The third bearing 260 can achieve direct contact conduction between the anode target 300 and the heat conductor 200, and has a good heat dissipation effect.

[0108] In some embodiments, the third bearing 260 includes a metal liquid bearing. The metal liquid bearing includes an outer ring, an inner ring, and liquid metal. The liquid metal is sealed between the inner ring and the outer ring. When the outer ring and the inner ring rotate relative to each other, the liquid metal plays a lubricating role. The metal liquid bearing eliminates the rolling element in the traditional bearing, further reduces the friction between the rotor and the inner and outer rings, and has low friction resistance.

[0109] In addition, since the metal liquid bearing is filled with liquid metal, the heat of the anode target 300 can be directly transferred to the heat conductor 200 through the outer ring, liquid metal and inner ring of the metal liquid bearing by heat conduction. The heat dissipation effect of contact conduction is good, which improves the heat dissipation effect and service life of the anode target 300 and the third bearing 260, thereby enabling the X-ray generating device to obtain higher instantaneous power and continuous input power.

[0110] In some embodiments, in order to drive the anode target 300 to rotate, the heat conductive member 200 is provided with a rotor 500, and the rotor 500 and the third bearing 260 are sequentially arranged along the emission direction of the X-rays, that is, the rotor 500 is located at the end of the third bearing 260 away from the first transparent portion 121, and the end face of the rotor 500 is fixedly connected to the end face of the outer ring of the third bearing 260. There is a gap between the rotor 500 and the heat conductive member 200. That is, the rotor 500 can be suspended outside the heat conductive member 200 through the outer ring of the third bearing 260. There can be multiple fixing forms between the rotor 500 and the outer ring of the third bearing 260, for example, the two can be fixed by common methods such as welding, clamping, and riveting.

[0111] The rotor 500 may be a common rotor structure, for example, it may be a magnetic metal ring; the rotor 500 may cooperate with the stator to form a driving motor structure of an outer stator and an inner rotor. The stator may be a structure such as a stator coil, which may be arranged outside the housing 100. Optionally, the stator may be sleeved outside the anode glass shell 130. The rotor 500 may be fixed to the outer ring of the third bearing 260. When the stator is energized, the rotor 500 may be driven to rotate at a high speed to drive the outer ring of the third bearing 260 to rotate relative to the inner ring of the third bearing 260, thereby driving the anode target 300 to rotate relative to the heat conducting member 200.

[0112] By fixing the rotor 500 on the end surface of the outer ring of the third bearing 260 , the driving structure of the anode target 200 can be simplified, so that the anode target 300 can rotate at a high speed relative to the heat conducting member 200 .

[0113] Please continue to refer to Fig.10 In some embodiments, the heat conducting member 200 includes a first section 270, a second section 280, and a transition section 290. The second section 280, the transition section 290, and the first section 270 are sequentially connected along the emission direction of the X-rays, wherein the emission direction of the X-rays is Fig.10 From right to left in the figure, that is, the heat conducting member 200 is composed of a first section 270, a transition section 290 and a second section 280 from left to right.

[0114] Taking the plane perpendicular to the axis of the heat conducting member 200 as the cross section, the outer circumference of the cross section of the first section 270 is smaller than the outer circumference of the cross section of the second section 280, and the outer circumference of the cross section of the transition section 290 gradually increases from the end close to the first section 270 to the end close to the second section 280. The first section 270 and the second section 290 may be cylindrical sections, and the transition section 290 may be a truncated cone section. The transition section 290 may improve the connection angle between the first section 270 and the second section 290, reduce the flow resistance of the cooling medium, and avoid stress concentration of the heat conducting member 200.

[0115] The anode target 300 is sleeved outside the second section 280, and the third bearing 260 can be arranged between the anode target 300 and the second section 280. The first section 270 can be connected to the cover 120 through the insulating member 800, and the second section 280 can be connected to the anode glass shell 130. In this embodiment, since the outer peripheral size of the first section 270 in the cross section is smaller than the outer peripheral size of the second section 280 in the cross section, the area of ​​the through hole on the cover 120 for penetrating the heat conductor 200 can be appropriately reduced, and the area of ​​the first transparent portion 121 can be increased, thereby increasing the emission of X-rays. At the same time, the outer surface of the heat conductor 200 can be made closer to the outer surface of the anode target 300, so that heat can be quickly transferred from the anode target 300 to the heat conductor 200, thereby improving the heat dissipation effect.

[0116] Fig.11 for Fig.10 Heat dissipation diagram of the X-ray generator. Fig.11 When the X-ray generator is working, the rotor 500 drives the anode target 300 to rotate at a high speed; the first cathode 400 is energized, and a large number of electrons are gathered on it. The electrons bombard the anode target 300 under the action of the high-voltage electric field and generate X-rays, which are emitted from the housing 100 through the first transparent portion 121. At the same time, since a large amount of energy is converted into heat energy during the generation of X-rays, a large amount of heat is gathered on the anode target 300. The heat can be directly transferred to the heat conductor 200 through the third bearing 260, and is taken out of the housing 100 by the cooling medium in the heat conductor 200. Compared with the heat radiation heat transfer method in the related art, the heat dissipation efficiency of the contact heat dissipation is high, thereby improving the working stability and service life of the X-ray generator. In addition, since the anode target 300 is fixed to the outer ring of the third bearing 260, the force on the third bearing 260 is more balanced, the working noise of the anode target 300 is reduced, and the working stability is improved.

[0117] It should be noted that Fig.11 The flow direction of the cooling medium is from right to left. In other optional embodiments, the cooling medium may also flow from left to right. In addition, in the above description, the nouns indicating the orientation, such as top, bottom, left, and right, are based on the orientation in the accompanying drawings and should not be used to limit the present application. In other views or orientations, the orientations of top, bottom, left, and right can be adaptively changed.

[0118] Fig.12 is a schematic structural diagram of an X-ray generating device according to another exemplary embodiment of the present disclosure as viewed from the X-ray emitting side; Fig.13 is a schematic structural diagram of an X-ray generating device according to another exemplary embodiment of the present disclosure viewed from a side opposite to the X-ray emitting side; Fig.14 is a front view of an X-ray generating device according to another exemplary embodiment of the present disclosure; Fig.15 for Fig.14Middle CC section view. Please refer to Figures 12 to 15 The X-ray generating device has a first cathode 400 and a second cathode 600, that is, a dual cathode structure.

[0119] exist Figures 12 to 15 In the illustrated embodiment, the X-ray generating device further includes: a second cathode 600 connected to the outer shell 100; the outer shell 100 also has a second transparent portion 122; the second cathode 600 is arranged corresponding to the anode target 300, so that the electrons generated by the second cathode 600 bombard the anode target 300 to generate X-rays, and the X-rays are emitted from the outer shell 100 through the second transparent portion 122.

[0120] Among them, the structure of the second cathode 600 is the same as that of the first cathode 400, and it can also include: a ceramic core column, a cathode shielding tube, a cathode flat plate and a cathode head; the second cathode 600 can also be fixed on the outer shell 100 through a cathode glass shell. For details, please refer to the structure and connection form of the first cathode 400, which will not be repeated here.

[0121] The second cathode 600 can also be used to generate X-rays, and the X-rays generated by the electrons gathered in the second cathode 600 bombarding the anode target 300 can be emitted from the housing 100 through the second transparent portion 122. The second transparent portion 122 can be disposed on the cover 120, and its structure and connection form can be the same as those of the first transparent portion 121, and the details can refer to the first transparent portion 121.

[0122] In some embodiments, the second cathode 600 and the first cathode 400 are symmetrically arranged relative to the rotation axis of the anode target 300, and the first transparent portion 121 and the second transparent portion 122 can also be symmetrically arranged relative to the rotation axis, so that two parallel beams of X-rays for imaging can be generated simultaneously, reducing the number of useless X-rays.

[0123] Fig.16 for Fig.15 Heat dissipation diagram of the X-ray generator. Fig.16 When the X-ray generating device is working, the rotor 500 drives the anode target 300 to rotate at a high speed; the first cathode 400 and the second cathode 600 are energized, so that a large number of electrons gather on the first cathode 400 and the second cathode 600. Under the action of the high voltage electric field, the electrons simultaneously bombard the anode target 300 and generate two beams of X-rays. One beam of X-rays generated by the first cathode 400 is emitted from the housing 100 through the first transmission part 121, and one beam of X-rays generated by the second cathode 600 is emitted from the housing 100 through the second transmission part 122, thereby increasing the emission of X-rays and improving the speed of scanning and imaging. At the same time, the time of exposure of the scanned person to X-rays can be reduced.

[0124] It is understandable that when the X-ray generating device is used to scan a high-speed moving object, its imaging effect is poor. In order to improve the imaging effect, the related art usually adopts the method of increasing the rotation speed of the X-ray to enhance its ability to capture moving objects. However, due to the limitations of the industrial level and the huge centrifugal force caused by the rotation, the fastest X-ray can only reach 0.27s / r. Therefore, in the case of limited rotation speed of the X-ray, in order to obtain a clear image, the related art can only increase the data collection amount by increasing the rotation angle, which will increase the exposure time of the scanned person to the X-ray and pose a radiation hazard. In some embodiments of the present disclosure, by setting a dual cathode structure, the first cathode 400 and the second cathode 600 can generate X-rays at the same time, which increases the scanning speed of the X-ray, reduces the exposure time of the scanned person to the X-ray, reduces the radiation dose absorbed by the scanned person, and improves the quality of the image.

[0125] At the same time, different voltages can be applied to the first cathode 400 and the second cathode 600 to generate X-rays of different energies, collect image information of different tissues, and then use image fusion and reconstruction technology to obtain X-ray images that can reflect the chemical composition of the tissue, that is, tissue characteristic images, providing rich image information for the imaging results.

[0126] Since the electrons generated by the first cathode 400 and the second cathode 600 bombard the anode target 300 at the same time, the heat in the anode target 300 will increase to twice the original, and the anode target 300 is more likely to be broken down and melted than the structure in the related art. By setting the heat conductor 200 as a structure that penetrates the anode target 300, the heat transfer speed between the two is faster, and the heat generated by the anode target 300 can be quickly taken away, thereby increasing the X-ray emission while improving the service life of the anode target 300. Therefore, the X-ray generating device provided according to some embodiments of the present disclosure can adopt a dual cathode structure to increase the scanning speed to about twice that of the related art, and reduce the radiation absorption dose of the scanned person to about 75%.

[0127] According to another aspect of the present disclosure, an imaging device is provided, including a cooling system and an X-ray generating device, wherein the cooling system is connected to both ends of a heat conducting member 200 of the X-ray generating device, and the cooling system is used to transport a cooling medium into the heat conducting member 200 .

[0128] The X-ray generating device may be a structural form of any of the embodiments described above. The imaging device may be a scanning device that can utilize X-ray imaging, such as a medical CT machine. The cooling system may include a hydraulic pump and a heat exchanger. The hydraulic pump may be connected to both ends of the heat conductor 200 through a pipeline to form a circulation path for the cooling medium. The heat exchanger may perform heat exchange with the cooling medium after absorbing heat, thereby reducing the temperature of the cooling medium, so that the cooling medium may be re-delivered to the through channel 210.

[0129] Optionally, the imaging device is further provided with an exhaust device, which can be connected to the exhaust pipe 700, so as to extract the air in the accommodating chamber, form a vacuum in the accommodating chamber, and increase the bombardment speed of the electrons.

[0130] Optionally, the imaging device may further include a high voltage generator, which may be connected to the first cathode 400, thereby forming a high voltage between the first cathode 400 and the anode target 300. It is understood that the anode target 300 may be powered or grounded.

[0131] In addition, in order to display the image intuitively, the imaging device may also be provided with a display, which can display the collected image.

[0132] In the imaging device provided by some embodiments of the present disclosure, by setting the heat conductive part 200 of the X-ray generating device as a structure that penetrates the anode target 300 and the outer shell 100, a through channel 210 is provided inside the heat conductive part 200, and the cooling medium can take away the heat at the anode target 300 through the through channel 210, thereby improving the heat dissipation efficiency of the X-ray generating device, improving the service life of the X-ray generating device, and improving the service life and working stability of the imaging device.

[0133] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An X-ray generating device, comprising: Shell(100); A heat conducting member (200), the heat conducting member (200) being arranged to penetrate the housing (100), and having a through channel (210) inside the heat conducting member (200), the through channel (210) being used to circulate a cooling medium; an anode target (300), the anode target (300) being used to receive electron bombardment to generate X-rays, the anode target (300) being arranged in the housing (100) and rotatably sleeved outside the heat conducting member (200); in: The heat conducting member (200) comprises a first section (270), a second section (280) and a transition section (290), wherein the second section (280), the transition section (290) and the first section (270) are sequentially connected along an emission direction of the X-rays; Taking a plane perpendicular to the axis of the heat conducting member (200) as a cross section, the outer circumference of the cross section of the first section (270) is smaller than the outer circumference of the cross section of the second section (280), and the outer circumference of the cross section of the transition section (290) gradually increases from an end close to the first section (270) to an end close to the second section (280); The anode target (300) is sleeved outside the second section (280).

2. The X-ray generating device according to claim 1, wherein: A first bearing (220) is sleeved on the heat conducting member (200), the first bearing (220) is located at a first end of the anode target (300), and an inner ring of the first bearing (220) is fixedly connected to the heat conducting member (200), and an outer ring of the first bearing (220) is fixedly connected to the anode target (300); Furthermore, there is a gap between the inner surface of the anode target (300) and the heat conducting member (200).

3. The X-ray generating device according to claim 2, wherein: A second bearing (240) is also sleeved on the heat conducting member (200), the second bearing (240) being located at a second end of the anode target (300) away from the first bearing (220), and the inner ring of the second bearing (240) is fixedly connected to the heat conducting member (200), and the outer ring of the second bearing (240) is fixedly connected to the anode target (300).

4. The X-ray generating device according to claim 3, wherein: The first bearing (220), the anode target (300), and the second bearing (240) are arranged in sequence along the emission direction of the X-rays, and the first bearing (220) is a double-row bearing, and the second bearing (240) is a single-row bearing.

5. The X-ray generating device according to claim 2, wherein: The X-ray generating device further comprises a rotor (500) for rotating the anode target (300); the rotor (500) is sleeved outside the first bearing (220), and the rotor (500) is fixedly connected to the outer ring of the first bearing (220).

6. The X-ray generating device according to claim 1, wherein: A third bearing (260) is provided between the anode target (300) and the heat conducting member (200), the outer ring of the third bearing (260) being fixedly connected to the inner surface of the anode target (300), and the inner ring of the third bearing (260) being fixedly connected to the outer surface of the heat conducting member (200).

7. The X-ray generating device according to claim 6, wherein: The third bearing (260) comprises a metal liquid bearing.

8. The X-ray generating device according to claim 6, wherein: The heat conducting member (200) is provided with a rotor (500) for rotating the anode target (300), the rotor (500) and the third bearing (260) are arranged in sequence along the emission direction of the X-rays, and the end face of the rotor (500) is fixedly connected to the end face of the outer ring of the third bearing (260).

9. The X-ray generating device according to any one of claims 1 to 8, wherein: The anode target (300) gradually shrinks along the emission direction of the X-rays.

10. The X-ray generating device according to any one of claims 1 to 8, wherein: The X-ray generating device comprises: a first cathode (400) connected to the housing (100); The housing (100) comprises a first transparent portion (121); The first cathode (400) is arranged corresponding to the anode target (300), so that the electrons generated by the first cathode (400) bombard the anode target (300) to generate X-rays, and the X-rays are emitted from the housing (100) through the first transmission portion (121).

11. The X-ray generating device according to claim 10, wherein: The X-ray generating device further comprises: a second cathode (600) connected to the housing (100); The housing (100) further comprises a second transparent portion (122); The second cathode (600) is arranged corresponding to the anode target (300), so that the electrons generated by the second cathode (600) bombard the anode target (300) to generate X-rays, and the X-rays are emitted from the housing (100) through the second transmission portion (122).

12. The X-ray generating device according to claim 11, wherein: The second cathode (600) and the first cathode (400) are symmetrically arranged relative to the rotation axis of the anode target (300).

13. The X-ray generating device according to claim 11, wherein: The housing (100) comprises a shell (110) and a cover (120); The housing (110) comprises a bottom wall (111) and a side wall (112) connected to the bottom wall (111), wherein the bottom wall (111) and the side wall (112) together form a receiving cavity having an opening; The cover body (120) is covered on the opening, and the cover body (120) is arranged opposite to the bottom wall (111); The anode target (300) is arranged in the accommodating cavity; the first cathode (400) is connected to the side wall (112), and at least a portion of the first cathode (400) is located in the accommodating cavity; the first transparent portion (121) is arranged on the cover body (120); and the heat conducting member (200) is arranged to penetrate the cover body (120) and the bottom wall (111).

14. An imaging device, comprising a cooling system and an X-ray generating device as claimed in any one of claims 1 to 13, wherein the cooling system is connected to both ends of a heat conducting member (200) of the X-ray generating device, and the cooling system is used to transport a cooling medium into the heat conducting member (200).

Images