Cooling structure and X-ray bulb tube with same

Abstract

The utility model relates to the technical field of medical instruments, and discloses a cooling structure and an X-ray bulb tube with the same, the cooling structure comprises a tube shell, and a tube core vacuum cavity is arranged in the tube shell; the tube shell is further provided with a first cooling flow channel, the first cooling flow channel is arranged to be annular, and the first cooling flow channel surrounds the tube core vacuum cavity. The first cooling flow channel is provided with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole and the liquid outlet hole are formed in a spaced mode in the first direction, and the first direction is parallel to the axis direction of the first cooling flow channel; the extending direction of the liquid inlet hole is perpendicular to the axis direction of the first cooling flow channel, or the included angle between the extending direction of the liquid inlet hole and the axial direction of the first cooling flow channel is an acute angle. According to the cooling structure, the X-ray bulb tube with the cooling structure and the cooling method of the X-ray bulb tube, the cooling efficiency of the X-ray bulb tube can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a cooling structure and an X-ray tube having the same. Background Art

[0002] An X-ray tube, also known as an X-ray tube or transmitter, is a crucial component of CT (Computed Tomography) equipment. It heats the cathode, emitting an electron beam that emits high-energy X-rays, which scan the human body and produce three-dimensional images of its interior. Because the cathode is very hot, it must be cooled.

[0003] In related technologies, slots are typically created within the X-ray tube's window, sleeve, and liquid metal bearing core. Cooling liquid is then introduced into the slots along the X-ray tube's axis to cool the tube. For areas requiring enhanced cooling, this is often achieved by reducing the slots to increase the cooling liquid's flow rate. However, this approach has limited effectiveness in improving cooling efficiency. Utility Model Content

[0004] The present application provides a cooling structure and an X-ray tube having the same, which can improve the cooling efficiency of the X-ray tube.

[0005] In a first aspect, an embodiment of the present application provides a cooling structure for an X-ray tube, the cooling structure comprising a tube shell, a tube core vacuum cavity being arranged inside the tube shell; the tube shell is further provided with a first cooling channel isolated from the tube core vacuum cavity, the shape of the first cooling channel is set to be annular, and the first cooling channel surrounds the tube core vacuum cavity; the first cooling channel has a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are spaced apart along a first direction, the first direction is parallel to the axial direction of the first cooling channel, wherein the extension direction of the liquid inlet is perpendicular to the axial direction of the first cooling channel or the angle between the extension direction of the liquid inlet and the axial direction of the first cooling channel is an acute angle.

[0006] In some embodiments, the first cooling channel includes a first channel and a second channel distributed and connected in sequence along the first direction, the liquid inlet is provided in the first channel, the second channel is connected to the liquid outlet, and the liquid outlet is closer to the central axis of the cooling structure than the liquid inlet.

[0007] In some embodiments, the first cooling channel includes a third channel, the first channel, the second channel, and the third channel are sequentially distributed and connected along the first direction, and the third channel is connected to the liquid outlet.

[0008] In some of these embodiments, the cooling structure includes a flow restrictor disposed within the first cooling channel.

[0009] In some of these embodiments, a plurality of the flow restrictors are provided, and the plurality of flow restrictors are spaced apart along the first direction;

[0010] Alternatively, the first cooling channel has opposite first inner wall and second inner wall, the flow restrictor includes a first flow restrictor and a second flow restrictor, the first flow restrictor is connected to the first inner wall, the second flow restrictor is connected to the second inner wall, and there is a gap for the cooling liquid to flow between the first flow restrictor and the second flow restrictor.

[0011] In some of these embodiments, the first flow restrictor and the second flow restrictor are spaced apart along the first direction.

[0012] In some of these embodiments, with a plane parallel to the first direction as a reference plane, the projection of the first flow restrictor on the reference plane is a first projection, the projection of the second flow restrictor on the reference plane is a second projection, and there is an overlapping portion between the first projection and the second projection in the arrangement direction of the first inner wall and the second inner wall.

[0013] In some of these embodiments, the cooling structure includes a blocking member located within the first cooling channel, and the blocking member is disposed on a side of the liquid inlet hole close to the liquid outlet hole. The blocking member is used to contact the cooling liquid introduced into the first cooling channel from the liquid inlet hole to block the flow of the cooling liquid along the first direction.

[0014] In some of these embodiments, the blocking member includes a blocking surface that is coplanar with a side wall of the liquid inlet hole facing away from the liquid outlet hole.

[0015] In some of these embodiments, the blocking member protrudes from the hole wall of the liquid inlet hole in a direction perpendicular to the first direction.

[0016] In some of these embodiments, the cooling structure includes a guiding member located within the first cooling channel, and the guiding member is disposed on a side of the liquid inlet hole facing the second direction, the second direction being perpendicular to the first direction. The guiding member includes an arc-shaped guiding surface.

[0017] In some of these embodiments, the guiding surface is tangent to the bottom wall of the die vacuum cavity and is tangent to a hole wall of the liquid inlet hole facing away from the second direction.

[0018] In some of these embodiments, the cooling structure further includes a mandrel for connecting to the anode of the X-ray tube. The mandrel is disposed within the tube housing. The mandrel is provided with a second cooling channel and a liquid outlet channel. The shape of the second cooling channel is set to be annular. The second cooling channel is coaxially arranged with the first cooling channel, and the second cooling channel surrounds the liquid outlet channel. One end of the second cooling channel away from the liquid inlet hole communicates with the first cooling channel, and one end of the second cooling channel close to the liquid inlet hole communicates with the liquid outlet channel. One end of the liquid outlet channel away from the liquid inlet hole communicates with the liquid outlet hole;

[0019] Alternatively, the cooling structure further includes a cooling liquid circulation device. Both the liquid inlet hole and the liquid outlet hole are communicated with the cooling liquid circulation device.

[0020] In some of these embodiments, the cooling liquid in the first cooling channel can flow into the second cooling channel along the tangential direction of the second cooling channel and flow along a second spiral path, and flow out from the liquid outlet hole.

[0021] In a second aspect, an embodiment of the present application provides an X-ray tube. The X-ray tube includes an anode, a cathode, and the cooling structure as described in the first aspect. Both the anode and the cathode are disposed within the vacuum chamber of the tube core.

[0022] The beneficial effects of the cooling structure provided by the embodiment of the present application are as follows: Since the tube housing is provided with a first cooling channel isolated from the vacuum chamber of the tube core, the shape of the first cooling channel is set to be annular, the first cooling channel surrounds the vacuum chamber of the tube core, and the first cooling channel has a liquid inlet hole and a liquid outlet hole. The liquid inlet hole and the liquid outlet hole are spaced apart along a first direction, the first direction is parallel to the axis direction of the first cooling channel, the extending direction of the liquid inlet hole is perpendicular to the axis direction of the first cooling channel or the included angle between the extending direction of the liquid inlet hole and the axial direction of the first cooling channel is an acute angle. Therefore, by introducing cooling liquid into the first cooling channel through the liquid inlet hole, the cooling liquid can flow along a first spiral path in the first cooling channel and flow out from the liquid outlet hole, so as to extend the length of the flow path of the cooling liquid in the first cooling channel. At the same time, it can also make the flow velocity of the cooling liquid higher under the same flow rate, thereby improving the cooling efficiency of the X-ray tube.

[0023] For the beneficial effects of the X-ray tube provided by the present application compared with the prior art, reference can be made to the beneficial effects of the cooling structure provided by the present application compared with the prior art, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of an X-ray tube in the related art;

[0026] Figure 2 is Figure 1 a schematic diagram of the flow of the cooling liquid in a cross-section of the tube shell of the X-ray tube shown perpendicular to the axis of the tube shell itself;

[0027] Figure 3 is Figure 1 a schematic diagram of the flow of the cooling liquid in a cross-section of the core shaft of the X-ray tube shown perpendicular to the axis of the tube shell itself;

[0028] Figure 4 is a schematic structural diagram of an X-ray tube in the first embodiment of the present application;

[0029] Figure 5 is Figure 4 a schematic diagram of the flow of the cooling liquid in a cross-section of the tube shell of the X-ray tube shown perpendicular to the axis of the tube shell itself;

[0030] Figure 6 is Figure 4 a schematic diagram of the flow of the cooling liquid in a cross-section of the core shaft of the X-ray tube shown perpendicular to the axis of the tube shell itself;

[0031] Figure 7 is Figure 4 a schematic diagram of the velocity and acceleration when the cooling liquid flows in the tube shell of the X-ray tube shown;

[0032] Figure 8 is Figure 4 a schematic diagram of a partial structure of the tube shell of the X-ray tube shown;

[0033] Figure 9 is a schematic diagram of a partial structure of the tube shell in the second embodiment of the present application;

[0034] Figure 10 is a schematic diagram of a partial structure of the tube shell in the third embodiment of the present application;

[0035] Figure 11 is a schematic structural diagram of the tube shell in the fourth embodiment of the present application;

[0036] Figure 12It is a schematic diagram of a partial structure of a tube shell in the fifth embodiment of the present application;

[0037] Figure 13 is Figure 12 a schematic diagram of the structures of the blocking member and the flow guiding member shown;

[0038] Figure 14 is Figure 12 a diagram showing the relative positional relationship between the blocking member and the flow guiding member and the liquid inlet hole shown;

[0039] Figure 15 It is a simulation schematic diagram of a cooling structure in an X-ray tube in the first embodiment of the present application;

[0040] Figure 16 It is another simulation schematic diagram of a cooling structure in an X-ray tube in the first embodiment of the present application.

[0041] The meanings of the marks in the figure are as follows:

[0042] 001, tube housing; 002, tube housing cooling flow channel; 0021, liquid discharge hole; 003, cathode; 004, window; 005, anode; 006, stator winding; 007, core shaft; 008, core shaft cooling flow channel; 009, liquid inlet flow channel; 0091, liquid inlet hole;

[0043] 100, X-ray tube;

[0044] 10, tube shell; 101, tube core vacuum cavity; 11, first cooling flow channel; 1101, first inner wall; 1102, second inner wall; 111, first flow channel; 112, second flow channel; 113, third flow channel; 12, liquid inlet hole; 13, liquid outlet hole; 14, ray window;

[0045] 20, flow suppression member; 21, first flow suppression member; 22, second flow suppression member;

[0046] 30, blocking member; 31, blocking surface;

[0047] 40, flow guiding member; 41, flow guiding surface;

[0048] 50, core shaft; 51, second cooling flow channel; 52, liquid outlet flow channel;

[0049] 60, anode;

[0050] 70, cathode;

[0051] 80, stator winding;

[0052] 200, reference plane. Detailed implementation manners

[0053] In order to make the objectives, technical solutions, and advantages of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0056] Reference to "an embodiment", "some embodiments", or "the embodiments" in the description of the present application means that a specific feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all of the embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, specific features, structures, or characteristics can be combined in any suitable manner.

[0057] In order to illustrate the technical solution of the present application, the following will be described with reference to specific accompanying drawings and embodiments.

[0058] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which are schematic structural diagrams of an X-ray tube in the related art, Figure 2 is Figure 1 a schematic diagram of the flow of the cooling liquid in a cross-section of the tube housing of the X-ray tube shown in a direction perpendicular to its own axis. Figure 3 is Figure 1 a schematic diagram of the flow of the cooling liquid in a cross-section of the core shaft of the X-ray tube shown in a direction perpendicular to the axis of the tube housing.

[0059] In the related art, generally, gaps are provided inside a window 004, a tube housing 001, a liquid metal bearing mandrel 007, etc. of an X-ray tube, and a cooling liquid is introduced into the gaps along the axial direction of the X-ray tube, thereby cooling the X-ray tube.

[0060] Optionally, a receiving cavity and a tube housing cooling channel 002 are provided inside the tube housing 001. A cathode 003, an anode 005, and a liquid metal bearing mandrel 007 are provided inside the receiving cavity. A mandrel cooling channel 008 and a liquid inlet channel 009 that are connected and communicated are provided inside the liquid metal bearing mandrel 007. The liquid inlet channel 009 is connected and communicated with the tube housing cooling channel 002. A stator wire package 006 is further provided inside the tube housing 001. A drain hole 0021 is provided in the tube housing cooling channel 002, and a liquid inlet hole 0091 is provided in the liquid inlet channel 009. The axial direction of the X-ray tube is parallel to Figure 1 the direction indicated by the large arrow J in the figure.

[0061] When using the above X-ray tube, a cooling liquid is introduced through the liquid inlet hole 0091, and the cooling liquid sequentially flows through the liquid inlet channel 009, the mandrel cooling channel 008, and the tube housing cooling channel 002 along Figure 1 the direction indicated by the small arrow in the figure, and finally flows out through the drain hole 0021, taking away the heat inside the tube housing 001, so as to achieve the purpose of cooling the X-ray tube.

[0062] For parts that need to be cooled intensively, the cooling efficiency is often enhanced by narrowing the gaps (such as the liquid inlet channel 009, the mandrel cooling channel 008, the tube housing cooling channel 002, etc.) to increase the flow rate of the cooling liquid, but the effect of improving the cooling efficiency in this way is limited.

[0063] In the cooling structure, the X-ray tube having the same, and the cooling method of the X-ray tube provided by the embodiment of the present application, since the tube shell is provided with a first cooling channel isolated from the tube core vacuum cavity, the shape of the first cooling channel is set to be annular, the first cooling channel surrounds the tube core vacuum cavity, and the first cooling channel has a liquid inlet hole and a liquid outlet hole. The liquid inlet hole and the liquid outlet hole are spaced apart along a first direction, the first direction is parallel to the axial direction of the first cooling channel, the extending direction of the liquid inlet hole is perpendicular to the axial direction of the first cooling channel or the included angle between the extending direction of the liquid inlet hole and the axial direction of the first cooling channel is an acute angle. Therefore, the cooling liquid can be introduced into the first cooling channel through the liquid inlet hole, so that the cooling liquid flows along a first spiral path in the first cooling channel and flows out through the liquid outlet hole, thereby extending the length of the path of the cooling liquid flowing in the first cooling channel, and at the same time, the flow rate of the cooling liquid can be higher under the same flow rate, so as to improve the cooling efficiency of the X-ray tube.

[0064] Please refer to Figure 4 、 Figure 5 andFigure 6 , Figure 4 is a schematic structural diagram of the X-ray tube 100 in the first embodiment of the present application, Figure 5 and Figure 4 is a schematic diagram of the flow of the cooling liquid in a cross-section of the tube shell 10 (housing) in the X-ray tube 100 shown in a direction perpendicular to the axis of the tube shell 10 (housing) itself, Figure 6 and Figure 4 is a schematic diagram of the flow of the cooling liquid in a cross-section of the core shaft 50 in the X-ray tube 100 shown in a direction perpendicular to the axis of the tube shell 10 itself.

[0065] In a first aspect, an embodiment of the present application provides a cooling structure for an X-ray tube 100. The cooling structure includes a tube shell 10 (housing), and a tube core vacuum chamber 101 (accommodation chamber) is provided inside the tube shell 10 (housing).

[0066] The tube core vacuum chamber 101 (accommodation chamber) is used to place components such as a cathode 70 and an anode 60.

[0067] The tube shell 10 is further provided with a first cooling channel 11 isolated from the tube core vacuum chamber 101. The shape of the first cooling channel 11 is set to be annular, and the first cooling channel 11 surrounds the tube core vacuum chamber 101; the first cooling channel 11 has a liquid inlet hole 12 and a liquid outlet hole 13, and the liquid inlet hole 12 and the liquid outlet hole 13 are spaced apart along a first direction, and the first direction is parallel to the axis direction of the first cooling channel 11.

[0068] The first direction can be as Figure 4 indicated by the arrow K in

[0069] Among them, the extending direction of the liquid inlet hole 12 is perpendicular to the axis direction of the first cooling channel 11 or the included angle between the extending direction of the liquid inlet hole 12 and the axial direction of the first cooling channel 11 is an acute angle.

[0070] By introducing the cooling liquid into the first cooling channel 11 from the liquid inlet hole 12, the cooling liquid can flow along a first spiral path in the first cooling channel 11 and flow out from the liquid outlet hole 13.

[0071] The cooling liquid can be insulating oil, water-based antifreeze, liquid metal, etc.

[0072] For example, the extending direction of the liquid inlet hole 12 is along the tangent direction of the first cooling channel 11 (such as Figure 5 indicated by the arrow M in

[0073] Please refer to Figure 7 ,Figure 7 is Figure 4 A schematic diagram of the velocity and acceleration when the cooling liquid flows in the tube shell 10 in the X-ray tube 100 shown in the figure.

[0074] When the cooling liquid is introduced into the first cooling channel 11 from the liquid inlet hole 12 along the tangent direction of the first cooling channel 11, the flow velocity V of the cooling liquid is the velocity V2 of the cooling liquid along the tangent direction of the first cooling channel 11, and the velocity V1 of the cooling liquid along the first direction is equal to 0.

[0075] After the cooling liquid enters the first cooling channel 11 from the liquid inlet hole 12 along the tangent direction of the first cooling channel 11, there is no acceleration source for the coolant along the tangent direction of the first cooling channel 11. Therefore, the acceleration a2 of the cooling liquid along the tangent direction of the first cooling channel 11 is equal to 0 (without considering other factors such as friction), so the acceleration a of the cooling liquid is equal to the acceleration a1 of the cooling liquid along the first direction.

[0076] Since the first cooling channel 11 has a liquid inlet hole 12 and a liquid outlet hole 13, and the liquid inlet hole 12 and the liquid outlet hole 13 are arranged at intervals along the first direction, the cooling liquid has an acceleration a1 in the first direction. The existence of the acceleration a1 makes the velocity V1 of the cooling liquid along the first direction gradually increase. Therefore, the cooling liquid will make a spiral rotation movement, that is, the cooling liquid flows along the first spiral path in the first cooling channel 11, and the first spiral path can be coaxially arranged with the first cooling channel 11.

[0077] As can be seen from the above, in the cooling structure provided by the embodiment of the present application, since the tube shell 10 is provided with a first cooling channel 11 isolated from the tube core vacuum chamber 101, the shape of the first cooling channel 11 is set to be annular, the first cooling channel 11 surrounds the tube core vacuum chamber 101, and the first cooling channel 11 has a liquid inlet hole 12 and a liquid outlet hole 13. The liquid inlet hole 12 and the liquid outlet hole 13 are arranged at intervals along the first direction, the first direction is parallel to the axis direction of the first cooling channel 11, the extending direction of the liquid inlet hole 12 is perpendicular to the axis direction of the first cooling channel 11 or the included angle between the extending direction of the liquid inlet hole 12 and the axial direction of the first cooling channel 11 is an acute angle. Therefore, by introducing the cooling liquid into the first cooling channel 11 from the liquid inlet hole 12, the cooling liquid can flow along the first spiral path in the first cooling channel 11 and flow out from the liquid outlet hole 13, so as to extend the length of the path of the cooling liquid flowing in the first cooling channel 11. At the same time, it can also make the flow velocity of the cooling liquid higher under the same flow rate, thereby improving the cooling efficiency of the X-ray tube 100.

[0078] It should be noted that in the existing cooling structure, since the cooling liquid flows along the axis of the X-ray tube 100, the shape of the cross-section of the flow channel perpendicular to the flow direction of the cooling liquid is a ring. In the cooling structure provided by the embodiment of the present application, the cooling liquid flows along the first spiral path in the first cooling channel 11, so the shape of the cross-section of the flow channel perpendicular to the flow direction of the cooling liquid is a rectangle. Since the area of the rectangle is much smaller than the area of the ring, under the condition of the same flow rate, the flow velocity of the cooling liquid will increase greatly, and at the same time, the path traveled by the cooling liquid will be longer, and the heat dissipation capacity will be greatly improved.

[0079] It should also be noted that under the condition of a certain flow rate, the smaller the cross-sectional area of the liquid inlet hole 12, the faster the flow velocity of the cooling liquid. At the same time, in order to make the cooling liquid rotate as completely as possible along the first spiral path, the design of the liquid inlet hole 12 can be achieved by controlling two variables, that is, the width and height of the liquid inlet hole 12. By controlling the width and height of the liquid inlet hole 12, the velocity and cross-sectional area of the cooling liquid entering the first cooling channel 11, and the angle between the cooling liquid entering the first cooling channel 11 from the liquid inlet hole 12 and the tangent direction of the first cooling channel 11 can be controlled. For example, the angle of the cooling liquid entering the first cooling channel 11 can be controlled by controlling the velocity V2 of the cooling liquid along the tangent direction of the first cooling channel 11 and the velocity V1 of the cooling liquid along the first direction. If a negative velocity V1 is artificially controlled for the angle, the increasing rate of the velocity V1 can also be reduced, so that the growth of the velocity V1 of the cooling liquid is as slow as possible, so that the cooling liquid rotates more completely along the first spiral path in the first cooling channel 11.

[0080] Compared with the existing cooling structure, the cooling structure provided by the embodiment of the present application has a smaller cross-sectional area of the cooling liquid, a longer flow path, and several times the surface flow velocity under the condition of the same heat dissipation with the same flow rate, so that the cooling performance of the X-ray tube 100 is greatly improved.

[0081] Optionally, the cooling structure further includes a cooling liquid circulation device (not shown in the figure). Both the liquid inlet hole 12 and the liquid outlet hole 13 are connected to the cooling liquid circulation device. The cooling liquid circulation device is used to reduce the temperature of the cooling liquid flowing out of the liquid outlet hole 13 and introduce the cooled cooling liquid into the liquid outlet hole 13.

[0082] With such a setting, the cooling liquid can be recycled and energy consumption can be saved.

[0083] Optionally, the cooling liquid circulation device may include a chiller or a heat exchanger, and the cooling liquid circulation device may further include a circulation pump, etc. The circulation pump is used to suck the cooling liquid from the liquid outlet hole 13 into the chiller or the heat exchanger, and the circulation pump is also used to pump the cooling liquid from the chiller or the heat exchanger into the liquid inlet hole 12.

[0084] Please also refer to Figure 8 , refer to Figure 8 , Figure 8 is Figure 4 a partial structural schematic diagram of the tube housing 10 in the X-ray tube 100 shown in

[0085] Optionally, the tube housing 10 is provided with a radiation window 14 (observation window), and the flow of the cooling liquid in the first cooling channel 11 can be viewed through the radiation window 14 (observation window).

[0086] Please refer to Figure 4 and Figure 6 , in this embodiment, the cooling structure further includes a mandrel 50 for connecting to the anode 60 of the X-ray tube 100. The mandrel 50 is disposed within the tube housing 10. The mandrel 50 is provided with a second cooling channel 51 and a liquid outlet channel 52. The shape of the second cooling channel 51 is set to be annular. The second cooling channel 51 is coaxially disposed with the first cooling channel 11, and the second cooling channel 51 surrounds the liquid outlet channel 52. One end of the second cooling channel 51 far from the liquid inlet hole 12 is communicated with the first cooling channel 11, one end of the second cooling channel 51 close to the liquid inlet hole 12 is communicated with the liquid outlet channel 52, and one end of the liquid outlet channel 52 far from the liquid inlet hole 12 is communicated with the liquid outlet hole 13.

[0087] By adopting the above solution, it is possible to enable the cooling liquid to continue to flow in the second cooling channel 51 and the liquid outlet channel 52 after flowing in the first cooling channel 11, so as to better cool the X-ray tube 100.

[0088] Among them, the cooling liquid in the first cooling channel 11 can flow into the second cooling channel 51 along the tangential direction of the second cooling channel 51 (such as Figure 6 the direction indicated by the arrow N in

[0089] and flow along the second spiral path, and flow out through the liquid outlet hole 13.

[0090] Please refer to Figure 9 , Figure 9 is a structural schematic diagram of the tube housing 10 in the second embodiment of the present application.

[0091] Different from the first embodiment, in the second embodiment, the first cooling channel 11 includes a first channel 111 and a second channel 112 that are sequentially distributed and connected in the first direction. The liquid inlet hole 12 is provided in the first channel 111, and the second channel 112 is communicated with the liquid outlet hole 13. The cooling liquid is introduced into the first cooling channel 11 from the liquid inlet hole 12 along the tangential direction of the first cooling channel 11, so that the flow velocity of the cooling liquid in the first channel 111 in the first direction is less than the flow velocity of the cooling liquid in the second channel 112 in the first direction.

[0092] By adopting the above scheme, the acceleration a1 of the cooling liquid in the first direction can be made smaller, so that the velocity V1 of the cooling liquid in the first direction increases as slowly as possible, and the cooling liquid rotates more completely along the first spiral path in the first cooling channel 11.

[0093] It can be understood that the thickness (radial dimension) of the channel is inversely proportional to the flow resistance of the cooling liquid. The smaller the thickness of the channel, the greater the flow resistance of the cooling liquid. Therefore, when the flow velocity of the cooling liquid in the first channel 111 in the first direction is less than the flow velocity of the cooling liquid in the second channel 112 in the first direction, the thickness e of the first channel 111 is greater than the thickness f of the second channel 112.

[0094] Optionally, the first cooling channel 11 includes a third channel 113. The first channel 111, the second channel 112 and the third channel 113 are sequentially distributed and connected in the first direction. The third channel 113 is communicated with the liquid outlet hole 13. The flow velocity of the cooling liquid in the third channel 113 in the first direction is less than the flow velocity of the cooling liquid in the second channel 112 in the first direction.

[0095] By adopting the above scheme, the cooling liquid can flow from the second channel 112 to the third channel 113 at a relatively large speed.

[0096] It can be understood that the thickness g of the third channel 113 is greater than the thickness f of the second channel 112.

[0097] Optionally, the liquid outlet hole 13 is closer to the central axis of the cooling structure than the liquid inlet hole 12. With such a setting, by introducing the cooling liquid into the first cooling channel 11 from the liquid inlet hole 12, the cooling liquid can flow along the first spiral path in the first cooling channel 11 and flow out from the liquid outlet hole 13.

[0098] Among them, the central axis of the cooling structure can be collinear with the axis of the first cooling channel 11.

[0099] Optionally, the extending direction of the liquid outlet hole 13 can be along the first direction.

[0100] Please refer to Figure 10 , Figure 10It is a partial structural schematic diagram of the shell 10 in the third embodiment of the present application.

[0101] Different from the first embodiment, in the third embodiment, the cooling structure includes a flow inhibitor 20, which is arranged in the first cooling flow channel 11 and is used to inhibit the flow of the cooling liquid along the first direction.

[0102] By adopting the above solution, the acceleration a1 of the cooling liquid along the first direction can be made smaller, so that the speed V1 of the cooling liquid along the first direction increases as slowly as possible, and the cooling liquid can rotate more completely along the first spiral path in the first cooling flow channel 11.

[0103] Optionally, a plurality of flow inhibitors 20 are provided, and the plurality of flow inhibitors 20 are arranged at intervals along the first direction.

[0104] With such an arrangement, the acceleration a1 of the cooling liquid along the first direction can be made even smaller, so that the speed V1 of the cooling liquid along the first direction increases more slowly, and the cooling liquid can rotate more completely along the first spiral path in the first cooling flow channel 11.

[0105] Please refer to Figure 11 , Figure 11 It is a partial structural schematic diagram of the shell 10 in the fourth embodiment of the present application.

[0106] Different from the third embodiment, in the fourth embodiment, the first cooling flow channel 11 has opposite first inner wall 1101 and second inner wall 1102. The flow inhibitor 20 includes a first flow inhibitor 21 (the first piece) and a second flow inhibitor 22 (the second piece). The first flow inhibitor 21 (the first piece) is connected to the first inner wall 1101, and the second flow inhibitor 22 (the second piece) is connected to the second inner wall 1102. There is a gap for the cooling liquid to flow between the first flow inhibitor 21 and the second flow inhibitor 22.

[0107] By adopting the above solution, the acceleration a1 of the cooling liquid along the first direction can be made smaller, so that the speed V1 of the cooling liquid along the first direction increases as slowly as possible, and the cooling liquid can rotate more completely along the first spiral path in the first cooling flow channel 11.

[0108] Among them, the first flow inhibitor 21 and the second flow inhibitor 22 are arranged at intervals along the first direction. With such an arrangement, the first flow inhibitor 21 and the second flow inhibitor 22 can reduce the acceleration of the cooling liquid along the first direction, so that the speed V1 of the cooling liquid along the first direction increases as slowly as possible.

[0109] It can be understood that the first flow inhibitor 21 and the second flow inhibitor 22 are arranged in a staggered manner, that is, the first flow inhibitor 21 and the second flow inhibitor 22 do not coincide in the first direction.

[0110] Optionally, a plane parallel to the first direction is used as a reference plane 200 (eg Figure 11 The projection of the first flow suppressor 21 on the reference plane 200 is the first projection, and the projection of the second flow suppressor 22 on the reference plane 200 is the second projection. The first projection and the second projection have an overlapping part in the arrangement direction of the first inner wall 1101 and the second inner wall 1102.

[0111] Such an arrangement can make the acceleration a1 of the cooling liquid along the first direction smaller, thereby making the speed V1 of the cooling liquid along the first direction increase more slowly, so that the cooling liquid can achieve a more complete rotation along the first spiral path in the first cooling channel 11 .

[0112] For example, Figure 11 The plane where the view is located is the reference plane 200, then Figure 11 The first flow suppressor 21 observed in the figure is the first projection. Figure 11 The second flow suppressor 22 observed in FIG is the second projection, and the arrangement direction of the first inner wall 1101 and the second inner wall 1102 is from the upper right to the lower left (as shown in FIG. Figure 11 The first projection and the second projection have an overlapping portion in the direction from the upper right to the lower left.

[0113] Please refer to Figure 12 、 Figure 13 and Figure 14 , Figure 12 is a partial structural diagram of the tube shell 10 in the fifth embodiment of the present application, Figure 13 yes Figure 12 The structural diagram of the blocking member 30 and the flow guide member 40 is shown in FIG. Figure 14 yes Figure 12 The relative position relationship diagram of the blocking member 30, the flow guide member 40 and the liquid inlet hole 12 is shown.

[0114] Different from the first embodiment, in the fifth embodiment, the cooling structure includes a blocking member 30, which is located in the first cooling channel 11, and the blocking member 30 is arranged on the side of the liquid inlet 12 close to the liquid outlet 13. The blocking member 30 is used to contact the cooling liquid flowing into the first cooling channel 11 from the liquid inlet 12 to block the cooling liquid from flowing in the first direction.

[0115] By adopting the above solution, it is possible to avoid the cooling liquid flowing into the first cooling channel 11 from the liquid inlet hole 12 having a speed in the first direction that is not zero, thereby preventing the cooling liquid from subsequently flowing along the first spiral path.

[0116] Optionally, the blocking member 30 includes a blocking surface 31, and the blocking surface 31 is coplanar with the hole wall of the liquid inlet hole 12 facing away from the liquid outlet hole 13. With such a setting, it is convenient to arrange the position of the blocking member 30.

[0117] It can be understood that the blocking member 30 can be welded or bonded to the tube shell 10, or the blocking member 30 can be integrally cast or integrally machined with the tube shell 10.

[0118] Optionally, the blocking member 30 protrudes from the hole wall of the liquid inlet hole 12 in a direction perpendicular to the first direction.

[0119] With such a setting, it is possible to block the cooling liquid introduced into the first cooling channel 11 from the liquid inlet hole 12 over a larger range, and prevent the velocity of the cooling liquid introduced into the first cooling channel 11 from the liquid inlet hole 12 in the first direction from being non-zero, so as to avoid the subsequent inability to flow along the first spiral path.

[0120] For example, please specifically refer to Figure 14 , if the first direction is the direction perpendicular to the Figure 14 view where it is located and inward, then the blocking member 30 protrudes from the hole wall of the liquid inlet hole 12 in the leftward direction. In other embodiments, the blocking member 30 may also protrude from the hole wall of the liquid inlet hole 12 in the rightward direction.

[0121] In the fifth embodiment, the cooling structure includes a guiding member 40. The guiding member 40 is located in the first cooling channel 11, and the guiding member 40 is provided on the side of the liquid inlet hole 12 facing the second direction. The second direction is perpendicular to the first direction. The guiding member 40 includes an arc-shaped guiding surface 41. The guiding surface 41 is used to contact the cooling liquid introduced into the first cooling channel 11 from the liquid inlet hole 12, so that the cooling liquid flows along the tangent direction of the first cooling channel 11. The second direction may be Figure 14 the direction indicated by the arrow L in

[0122] By adopting the above solution, it can be ensured that as long as the cooling liquid introduced into the first cooling channel 11 from the liquid inlet hole 12 contacts the guiding member 40, it can flow along the tangent direction of the first cooling channel 11.

[0123] Optionally, the guiding surface 41 is tangent to the hole wall of the tube core vacuum cavity 101, and the guiding surface 41 is tangent to the hole wall of the liquid inlet hole 12 facing away from the second direction.

[0124] With such a setting, it is convenient to arrange the position of the guiding member 40.

[0125] It is understandable that the flow guiding member 40 can be welded or bonded to the tube shell 10, and the flow guiding member 40 can also be integrally cast or integrally processed with the tube shell 10. The flow guiding member 40 can also be welded or bonded to the blocking member 30, and the flow guiding member 40 can also be integrally cast or integrally processed with the blocking member 30.

[0126] Please refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 15 and Figure 16 , Figure 15 FIG. Figure 15 is a schematic simulation diagram of the cooling structure in the X-ray tube 100 in the first embodiment of the present application. Figure 16 FIG. Figure 16 is another schematic simulation diagram of the cooling structure in the X-ray tube 100 in the first embodiment of the present application.

[0127] In the first embodiment, the cooling liquid flows in the second cooling channel 51 along the axial direction of the first cooling channel 11.

[0128] By adopting the above solution, the cooling liquid can flow in the first cooling channel 11 and then continue to flow in the second cooling channel 51 and the liquid outlet channel 52, so as to better cool the X-ray tube 100.

[0129] Please specifically refer to Figure 15 and Figure 16 ,from Figure 15 and Figure 16 it can be seen that after the cooling liquid is introduced into the first cooling channel 11 from the liquid inlet hole 12 along the tangential direction of the first cooling channel 11, the cooling liquid flows in the first cooling channel 11 along the first spiral path, and continues to flow in the second cooling channel 51 and the liquid outlet channel 52 along the axial direction of the first cooling channel 11, and flows out from the liquid outlet hole 13. The initial velocity of the cooling liquid is relatively large. Under the condition of the same designed cooling liquid flow rate, through simulation calculation, the flow velocity of the wall surface of the tube shell 10 at the key part is increased by about ten times. Therefore, the convective heat transfer coefficient of this wall surface is increased, and the heat dissipation power of the convective heat transfer of this wall surface is increased by about three times.

[0130] In a second aspect, an embodiment of the present application provides an X-ray tube 100, which includes an anode 60, a cathode 70, and a cooling structure as in the first aspect. Both the anode 60 and the cathode 70 are arranged in the tube core vacuum chamber 101.

[0131] In the X-ray tube 100 provided by the embodiment of the present application, since the tube housing 10 is provided with a first cooling flow channel 11 isolated from the tube core vacuum chamber 101, the shape of the first cooling flow channel 11 is set to be annular, the first cooling flow channel 11 surrounds the tube core vacuum chamber 101, and the first cooling flow channel 11 has a liquid inlet hole 12 and a liquid outlet hole 13. The liquid inlet hole 12 and the liquid outlet hole 13 are spaced along a first direction, the first direction is parallel to the axis direction of the first cooling flow channel 11, the extending direction of the liquid inlet hole 12 is perpendicular to the axis direction of the first cooling flow channel 11 or the included angle between the extending direction of the liquid inlet hole 12 and the axial direction of the first cooling flow channel 11 is an acute angle. Therefore, by introducing a cooling liquid into the first cooling flow channel 11 through the liquid inlet hole 12, the cooling liquid can flow along a first spiral path in the first cooling flow channel 11 and flow out through the liquid outlet hole 13, so as to extend the length of the path of the cooling liquid flowing in the first cooling flow channel 11. At the same time, the flow velocity of the cooling liquid can be higher under the same flow rate, thereby improving the cooling efficiency of the X-ray tube 100.

[0132] It can be understood that the X-ray tube 100 may further include a stator winding 80 and the like.

[0133] In a third aspect, the embodiment of the present application provides a cooling method for an X-ray tube 100. Using the cooling structure as in the first aspect, the cooling method includes:

[0134] Introduce a cooling liquid into the first cooling flow channel 11 through the liquid inlet hole 12 along the tangential direction of the first cooling flow channel 11, so that the cooling liquid located in the first cooling flow channel 11 flows along a first spiral path and flows out through the liquid outlet hole 13.

[0135] In the cooling method of the X-ray tube 100 provided by the embodiment of the present application, since the tube housing 10 is provided with a first cooling flow channel 11 isolated from the tube core vacuum chamber 101, the shape of the first cooling flow channel 11 is set to be annular, the first cooling flow channel 11 surrounds the tube core vacuum chamber 101, and the first cooling flow channel 11 has a liquid inlet hole 12 and a liquid outlet hole 13. The liquid inlet hole 12 and the liquid outlet hole 13 are spaced along a first direction, the first direction is parallel to the axis direction of the first cooling flow channel 11, the extending direction of the liquid inlet hole is perpendicular to the axis direction of the first cooling flow channel 11 or the included angle between the extending direction of the liquid inlet hole 12 and the axial direction of the first cooling flow channel 11 is an acute angle. Therefore, by introducing a cooling liquid into the first cooling flow channel 11 through the liquid inlet hole 12, the cooling liquid can flow along a first spiral path in the first cooling flow channel 11 and flow out through the liquid outlet hole 13, so as to extend the length of the path of the cooling liquid flowing in the first cooling flow channel 11. At the same time, the flow velocity of the cooling liquid can be higher under the same flow rate, thereby improving the cooling efficiency of the X-ray tube 100.

[0136] Optionally, cooling liquid is introduced into the first cooling channel 11 through the liquid inlet hole 12 along the tangential direction of the first cooling channel 11.

[0137] With such an arrangement, by introducing the cooling liquid into the first cooling channel 11 through the liquid inlet hole 12 along the tangential direction of the first cooling channel 11, the cooling liquid can flow along the first spiral path in the first cooling channel 11 and flow out through the liquid outlet hole 13, thereby extending the length of the flow path of the cooling liquid in the first cooling channel 11. At the same time, the flow velocity of the cooling liquid can also be higher under the same flow rate.

[0138] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A cooling structure, characterized in that, For an X-ray tube (100), the cooling structure includes a tube housing (10), and a tube core vacuum chamber (101) is arranged inside the tube housing (10); the tube housing (10) is further provided with a first cooling flow channel (11) isolated from the tube core vacuum chamber (101), the shape of the first cooling flow channel (11) is set to be annular, and the first cooling flow channel (11) surrounds the tube core vacuum chamber (101); the first cooling flow channel (11) has a liquid inlet hole (12) and a liquid outlet hole (13), the liquid inlet hole (12) and the liquid outlet hole (13) are arranged at intervals in a first direction, the first direction is parallel to the axial direction of the first cooling flow channel (11), wherein, the extending direction of the liquid inlet hole (12) is perpendicular to the axial direction of the first cooling flow channel (11) or the included angle between the extending direction of the liquid inlet hole (12) and the axial direction of the first cooling flow channel (11) is an acute angle.

2. The cooling structure according to claim 1, characterized in that, The first cooling flow channel (11) includes a first flow channel (111) and a second flow channel (112) which are sequentially distributed and communicated along the first direction, the liquid inlet hole (12) is arranged in the first flow channel (111), the second flow channel (112) is communicated with the liquid outlet hole (13), and the liquid outlet hole (13) is closer to the central axis of the cooling structure than the liquid inlet hole (12).

3. The cooling structure according to claim 2, characterized in that, The first cooling flow channel (11) includes a third flow channel (113), the first flow channel (111), the second flow channel (112) and the third flow channel (113) are sequentially distributed and communicated along the first direction, and the third flow channel (113) is communicated with the liquid outlet hole (13).

4. The cooling structure according to claim 1, wherein [[ID=~3]]The cooling structure includes a flow restricting member (20), and the flow restricting member (20) is arranged in the first cooling flow channel (11).

5. The cooling structure according to claim 4, wherein, A plurality of the flow restricting members (20) are provided, and the plurality of flow restricting members (20) are arranged at intervals along the first direction; Alternatively, the first cooling flow channel (11) has opposite first inner wall (1101) and second inner wall (1102), the flow restricting member (20) includes a first flow restricting member (21) and a second flow restricting member (22), the first flow restricting member (21) is connected to the first inner wall (1101), the second flow restricting member (22) is connected to the second inner wall (1102), and there is a gap for the cooling liquid to flow between the first flow restricting member (21) and the second flow restricting member (22).

6. The cooling structure according to claim 5, wherein The first flow restricting member (21) and the second flow restricting member (22) are arranged at intervals along the first direction.

7. The cooling structure according to claim 6, characterized in that, Taking a plane parallel to the first direction as a reference plane, the projection of the first flow restricting member (21) on the reference plane is a first projection, the projection of the second flow restricting member (22) on the reference plane is a second projection, and the first projection and the second projection have an overlapping part in the arrangement direction of the first inner wall (a1101) and the second inner wall (1102).

8. The cooling structure according to claim 1, wherein The cooling structure includes a blocking member (30), the blocking member (30) is located in the first cooling channel (11), and the blocking member (30) is arranged on a side of the liquid inlet hole (12) close to the liquid outlet hole (13). The blocking member (30) is used to contact the cooling liquid introduced into the first cooling channel (11) from the liquid inlet hole (12) to block the cooling liquid from flowing along the first direction.

9. The cooling structure according to claim 8, characterized in that, The blocking member (30) includes a blocking surface (31), and the blocking surface (31) is coplanar with a side wall of the liquid inlet hole (12) facing away from the liquid outlet hole (13).

10. The cooling structure according to claim 9, wherein, The blocking member (30) protrudes from a hole wall of the liquid inlet hole (12) in a direction perpendicular to the first direction.

11. The cooling structure according to claim 1, characterized in that, The cooling structure includes a guiding member (40), the guiding member (40) is located in the first cooling channel (11), and the guiding member (40) is arranged on a side of the liquid inlet hole (12) facing the second direction. The second direction is perpendicular to the first direction, and the guiding member (40) includes an arc-shaped guiding surface (41).

12. The cooling structure according to claim 11, characterized in that, The guiding surface (41) is tangent to a bottom wall of the tube core vacuum chamber (101), and the guiding surface (41) is tangent to a hole wall of the liquid inlet hole (12) facing away from the second direction.

13. The cooling structure according to any one of claims 1 to 12, characterized in that, The cooling structure further includes a core shaft (50) for connecting with an anode (60) of the X-ray tube (100). The core shaft (50) is arranged in the tube shell (10). The core shaft (50) is provided with a second cooling channel (51) and a liquid outlet channel (52). The shape of the second cooling channel (51) is set to be annular. The second cooling channel (51) is coaxially arranged with the first cooling channel (11), and the second cooling channel (51) surrounds the liquid outlet channel (52). One end of the second cooling channel (51) far from the liquid inlet hole (12) is communicated with the first cooling channel (11), one end of the second cooling channel (51) close to the liquid inlet hole (12) is communicated with the liquid outlet channel (52), and one end of the liquid outlet channel (52) far from the liquid inlet hole (12) is communicated with the liquid outlet hole (13); Alternatively, the cooling structure further includes a cooling liquid circulation device, and both the liquid inlet hole (12) and the liquid outlet hole (13) are communicated with the cooling liquid circulation device.

14. The cooling structure according to claim 13, characterized in that, The cooling liquid in the first cooling channel (11) can flow into the second cooling channel (51) along a tangential direction of the second cooling channel (51) and flow along a second spiral path, and flow out from the liquid outlet hole (13).

15. An X-ray tube, characterized in that, The X-ray tube (100) includes an anode (60), a cathode (70) and the cooling structure according to any one of claims 1 to 14, and both the anode (60) and the cathode (70) are arranged in the tube core vacuum chamber (101).

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