A rotating anode target, an X-ray tube, and a liquid metal sliding bearing

Abstract

The present application discloses a rotating anode target disk, comprising: an anode target disk, and a sliding bearing connected to the anode target disk, wherein the sliding bearing comprises: a bearing sleeve, a bearing core, a rotating flange and liquid metal, wherein the bearing sleeve is connected to the anode target disk and is sleeved on the outer side of the bearing core from the front end of the bearing core, the rotating flange is sleeved on the outer side of the bearing core and connected to the rear end of the bearing sleeve, thereby forming a receiving cavity for receiving liquid metal between the bearing core and the bearing sleeve, and the liquid metal is arranged in the receiving cavity, and further comprises a screw and a porous component, and the rear end of the bearing sleeve is provided with a threaded hole adapted to the screw, and the rotating flange is provided with a mounting hole corresponding to the threaded hole, wherein the screw passes through the mounting hole and is connected to the threaded hole and connects the rotating flange to the bearing sleeve, and the screw is provided with a through hole communicated with the threaded hole; and the porous component is inserted in the through hole to release air in the threaded hole and prevent leakage of the liquid metal.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical parts processing, and in particular to a rotating anode target, an X-ray tube, and a liquid metal sliding bearing. Background Art

[0002] Liquid metal lubrication is a common bearing lubrication method currently used in high-power, high-heat-capacity CT tubes. Because liquid metal sliding bearings increase the contact area between the rotor and stator compared to traditional ball bearings, tubes using these bearings offer improved heat dissipation, low noise, and high-quality images during operation. Figure 1 This is a schematic diagram of the structure of an X-ray tube based on a liquid metal sliding bearing in the prior art;

[0003] Figure 2 This is a schematic diagram of the structure of the liquid metal sliding bearing in the prior art. Figure 1 and Figure 2 As shown, a liquid metal sliding bearing generally consists of a bearing outer sleeve, a rotating flange, and a bearing core. Liquid metal, acting as a lubricant, fills the gaps between the outer sleeve, the rotating flange, and the bearing core. This bearing structure typically includes a threaded hole of a certain depth machined into the end face of the outer sleeve. The outer sleeve and the rotating flange are secured together by screws. Figure 3 It is a structural diagram of a bearing jacket in the prior art; Figure 4 This is an enlarged schematic diagram of the local structure of the bearing sleeve and the rotating flange in the prior art. Figure 3 and Figure 4 As shown in the figure, in order to prevent residual gas from remaining at the roots of the screws and threaded holes after the bearing housing and the rotating flange are fixed, thereby affecting the vacuum degree in the X-ray tube, it is also necessary to machine an exhaust hole on the side of the screw hole of the bearing housing to remove the residual gas in the threaded hole of the bearing housing.

[0004] However, due to machining precision, a slight gap inevitably exists between the contact surfaces of the bearing housing and the rotating flange. When the X-ray tube is operating, centrifugal force causes liquid metal to overflow from this gap and leak out of the bearing housing through the vents. This leak not only impairs lubrication of the sliding bearing itself but also potentially damages the pressure resistance of the CT tube. To minimize liquid metal leakage and extend the tube's lifespan, researchers are continuously researching effective liquid metal leak prevention measures.

[0005] With respect to the technical problem in the prior art mentioned above that it is impossible to ensure the vacuum degree in the X-ray tube while preventing the leakage of liquid metal, no effective solution has been proposed so far. Summary of the Invention

[0006] The present disclosure provides a rotating anode target, an X-ray tube, and a liquid metal sliding bearing, which at least solve the technical problem in the prior art that it is impossible to ensure the vacuum degree in the X-ray tube while avoiding liquid metal leakage.

[0007] According to one aspect of the present application, a rotating anode target disk is provided, comprising: an anode target disk, and a sliding bearing connected to the anode target disk, wherein the sliding bearing comprises: a bearing sleeve, a bearing core, a rotating flange and liquid metal, wherein the bearing sleeve is connected to the anode target disk and is sleeved on the outer side of the bearing core from the front end of the bearing core, the rotating flange is sleeved on the outer side of the bearing core and connected to the rear end of the bearing sleeve, thereby forming a receiving cavity for receiving liquid metal between the bearing core and the bearing sleeve, and the liquid metal is arranged in the receiving cavity, and further comprising a screw and a porous component, and the rear end of the bearing sleeve is provided with a threaded hole adapted to the screw, and the rotating flange is provided with a mounting hole corresponding to the threaded hole, wherein the screw passes through the mounting hole and is connected to the threaded hole and connects the rotating flange to the bearing sleeve, and the screw is provided with a through hole communicated with the threaded hole; and the porous component is inserted into the through hole to release air in the threaded hole and prevent leakage of the liquid metal.

[0008] According to another aspect of the present application, an X-ray tube is provided, comprising: a rotating anode target disk, a cathode disposed opposite the rotating anode target disk, and a housing connected to the rotating anode target disk and the cathode, respectively. The rotating anode target disk comprises: an anode target disk and a sliding bearing connected to the anode target disk, wherein the sliding bearing comprises: a bearing sleeve, a bearing core, a rotating flange, and liquid metal. The bearing sleeve is connected to the anode target disk and is sleeved onto the outside of the bearing core from the front end of the bearing core. The rotating flange is sleeved onto the outside of the bearing core and connected to the rear end of the bearing sleeve, thereby forming a receiving chamber for receiving the liquid metal between the bearing core and the bearing sleeve, and the liquid metal is disposed in the receiving chamber. The tube further comprises a screw and a porous component, wherein the rear end of the bearing sleeve is provided with a threaded hole adapted for the screw, and the rotating sleeve is provided with a mounting hole corresponding to the threaded hole, wherein the screw passes through the mounting hole and is connected to the threaded hole and connects the rotating flange to the bearing sleeve, and the screw is provided with a through hole communicating with the threaded hole. The porous component is inserted into the through hole to release air in the threaded hole and prevent leakage of the liquid metal.

[0009] According to another aspect of the present application, a bearing sleeve, a bearing core, a rotating flange and liquid metal are provided, wherein the bearing sleeve is sleeved on the outside of the bearing core from the front end of the bearing core, the rotating flange is sleeved on the outside of the bearing core and connected to the rear end of the bearing outside, thereby forming a accommodating cavity for accommodating liquid metal between the bearing core and the bearing sleeve, and the liquid metal is arranged in the accommodating cavity, and also includes screws and porous components, and the rear end of the bearing sleeve is provided with a threaded hole adapted to the screw, and the rotating flange is provided with a mounting hole corresponding to the threaded hole, wherein the screw passes through the mounting hole and is connected to the threaded hole, and connects the rotating flange to the bearing sleeve, and the screw is provided with a through hole connected to the threaded hole; and the porous component is inserted in the through hole to release the air in the threaded hole and prevent the leakage of liquid metal.

[0010] Therefore, the technical solution of this embodiment solves the above-mentioned technical problems existing in the prior art. This embodiment is applicable to a rotating anode target, an X-ray tube, and a liquid metal sliding bearing in the field of mechanical parts processing technology, and has the following advantages:

[0011] 1. The top screw of the present invention is provided with multiple pores, and the residual gas at the root of the threaded hole can be discharged through the multiple pores of the top screw;

[0012] 2. The top screw of the present invention is provided with multiple pores, which increase the contact area of the top screw, thereby effectively preventing liquid metal leakage;

[0013] 3. The bottom of the rotating flange of the present invention is provided with a membrane layer, which can effectively prevent liquid metal from leaking through the gap between the screw and the rotating flange;

[0014] 4. The bearing sleeve and the rotating flange in the present invention are connected together by welding, which can not only increase the connection strength between the bearing sleeve and the rotating flange, but also prevent liquid metal from leaking from the contact surface between the bearing sleeve and the rotating flange.

[0015] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of an X-ray tube based on a liquid metal sliding bearing in the prior art;

[0018] Figure 2 It is a structural diagram of a liquid metal sliding bearing in the prior art;

[0019] Figure 3 It is a structural diagram of a bearing jacket in the prior art;

[0020] Figure 4 It is an enlarged schematic diagram of the local structure of the bearing sleeve and the rotating flange in the prior art;

[0021] Figure 5 is a schematic diagram of installing a screw with a jackscrew inside a threaded hole according to one embodiment of the present application;

[0022] Figure 6 This is a schematic structural diagram of a screw and a jackscrew according to an embodiment of the present application;

[0023] Figure 7 This is a schematic diagram of adding a welding edge to the end face of a bearing sleeve according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present disclosure.

[0026] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present disclosure described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] According to a first aspect of the present embodiment, a rotating anode target disk is provided. Figure 1 The figure shows a schematic diagram of the structure of an X-ray tube based on a liquid metal sliding bearing in the prior art. Figure 2 The figure shows the structure of the liquid metal sliding bearing in the prior art. Figure 3 The structure diagram of the bearing sleeve in the prior art is shown. Figure 4 It shows an enlarged schematic diagram of the local structure of the bearing sleeve and the rotating flange in the prior art. Figure 5 A schematic diagram of installing a screw with a jackscrew inside a threaded hole according to an embodiment of the present application is shown. Figure 6 A schematic diagram of the structure of a screw and a top screw according to an embodiment of the present application is shown. Figure 7 A schematic diagram of adding a welding edge to the cross section of a bearing sleeve according to an embodiment of the present application is shown.

[0029] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, a rotating anode target disk comprises: an anode target disk 10, and a sliding bearing 20 connected to the anode target disk 10, wherein the sliding bearing 20 comprises: a bearing sleeve 201, a bearing core 202, a rotating flange 203 and liquid metal 204, wherein the bearing sleeve 201 is connected to the anode target disk 10 and is sleeved on the outer side of the bearing core 202 from the front end of the bearing core 202, the rotating flange 203 is sleeved on the outer side of the bearing core 202 and connected to the rear end of the bearing sleeve 201, thereby forming a receiving cavity 205 for receiving the liquid metal 204 between the bearing core 202 and the bearing sleeve 201, and the liquid metal 204 04 is arranged in the accommodating cavity 205, and also includes a screw 206 and a porous component 207, and the rear end of the bearing sleeve 201 is provided with a threaded hole 208 adapted to the screw 206, and the rotating flange 203 is provided with a mounting hole 209 corresponding to the threaded hole 208, wherein the screw 206 passes through the mounting hole 209 and is connected with the threaded hole 208, and connects the rotating flange 203 to the bearing sleeve 201, and the screw 206 is provided with a through hole 210 connected with the threaded hole 208; and the porous component 207 is inserted in the through hole 210, for releasing the air in the threaded hole 208 and blocking the leakage of the liquid metal 204.

[0030] As described in the background art, to prevent residual gas from remaining at the roots of the screws and threaded holes after the bearing sleeve and the rotating flange are fixed, thereby affecting the vacuum level inside the X-ray tube, it is also necessary to machine an exhaust hole on the side of the screw hole of the bearing sleeve to remove the residual gas in the threaded hole of the bearing sleeve. However, due to machining accuracy, there must be a slight gap between the contact surfaces of the bearing sleeve and the rotating flange. When the X-ray tube is operating, under the action of centrifugal force, liquid metal will overflow from the contact surface gap between the bearing sleeve and the rotating flange and leak out of the bearing sleeve through the exhaust hole. When liquid metal leaks, it will not only cause poor lubrication of the sliding bearing itself, but may also damage the pressure resistance of the CT tube. In order to suppress liquid metal leakage and extend the service life of the tube, people have been studying effective liquid metal leakage prevention measures.

[0031] To address this technical issue, a threaded hole 208 is defined at the rear end of the bearing sleeve 201 to secure the rotating flange 203. A mounting hole 209 corresponding to the threaded hole 208 is defined at the rear end of the rotating flange 203. The threaded hole 208 and mounting hole 209 are primarily used to mount a screw 206. The screw 206 is provided with a vertical through-hole 210, which communicates with the threaded hole 208. A porous component 207 is mounted in place of the through-hole 210 of the screw 206. The porous component 207 is a rod-shaped component with multiple pores internally disposed therein. The size of the porous component 207 matches the size of the through-hole 210 of the screw 206. Furthermore, the multiple pores within the porous component 207 significantly increase its contact area. Consequently, the porous component 207 can release residual gas at the base of the threaded hole 208 and prevent leakage of the liquid metal 204.

[0032] When the rotating anode target disk starts working, the sliding bearing 20 drives the anode target disk 10 to rotate. Under the action of centrifugal force, the liquid metal 204 arranged in the accommodating chamber 205 tends to break away from the outside. However, since there is no exhaust hole on the side of the threaded hole 208, the liquid metal 204 will not break away from the outside. And since the porous component 207 installed in the through hole 210 of the screw 206 is provided with multiple pores, the gas in the X-ray tube can be discharged through the multiple pores of the porous component 207, thereby not affecting the vacuum degree inside the sliding bearing 20. In addition, since the multiple pores in the porous component 207 increase its contact area, the leakage of the liquid metal 204 can be effectively prevented.

[0033] Thus, the operations of providing a screw 206 with a vertical through hole 210, providing a threaded hole 208 and a mounting hole 209 that are of a size matching the screw 206, and providing a porous component 207 with multiple pores that can be mounted in the through hole 210 of the screw 206 achieve the technical effect of effectively preventing the leakage of liquid metal 204 while removing the residual gas at the root of the threaded hole 208 through the porous component 207, thereby solving the technical problem of being unable to avoid the leakage of liquid metal 204 while ensuring the vacuum degree in the X-ray tube.

[0034] Optionally, the porous component 207 is a top screw 207 with a porous structure.

[0035] Specifically, the top screw 207 can be a rod-shaped component.

[0036] Optionally, the top wire 207 is made of a material that can react with the liquid metal 204 .

[0037] Specifically, the top wire 207 can be made of copper, silver, gold, etc. When the liquid metal 204 enters the inside of the top wire 207, it will react with the top wire 207. Thus, leakage of the liquid metal 204 can be avoided.

[0038] Optionally, the end surfaces of the rotating flange 203 and the screw 206 that abut against each other are respectively plated with a metal oxide film layer 211 .

[0039] Specifically, refer to Figure 5 As shown, to prevent liquid metal 204 from leaking through the gap between the contact surface of screw 206 and rotating flange 203, a metal oxide film 211 is coated on the contacting end surfaces of rotating flange 203 and screw 206. The metal oxide can be a material such as aluminum oxide or titanium oxide. Thus, coating the contacting end surfaces of rotating flange 203 and screw 206 with metal oxide film 211 achieves the technical effect of preventing liquid metal 204 from leaking through the gap between the contact surface of screw 206 and rotating flange 203.

[0040] Optionally, a welding portion 212 welded along the outer sides of the bearing sleeve 201 and the rotating flange 203 is provided at the abutting position between the bearing sleeve 201 and the rotating flange 203 .

[0041] Specifically, refer to Figure 7 As shown, a weld portion 212 is machined at the position where the bearing sleeve 201 abuts the rotating flange 203. Thus, the operation of providing the weld portion 212 welded along the outer sides of the bearing sleeve 201 and the rotating flange 203 at the abutment position of the bearing sleeve 201 and the rotating flange 203 can achieve the technical effect of increasing the connection strength between the bearing sleeve 201 and the rotating flange 203 and preventing the liquid metal 204 from leaking out of the gap at the contact surface between the bearing sleeve 201 and the rotating flange 203.

[0042] Optionally, a concave cavity 213 is provided on the inner surface of the rotating flange 203 opposite to the bearing core 202. Thus, when liquid metal leaks outward along the gap between the bearing core 202 and the rotating flange 203, it will first fill the concave cavity 213, thereby effectively preventing the liquid metal from further leaking outward.

[0043] According to another aspect of an embodiment of the present application, an X-ray tube is provided, comprising: a rotating anode target disk, a cathode arranged opposite to the rotating anode target disk, and a housing connected to the rotating anode target disk and the cathode, respectively. The rotating anode target disk comprises: an anode target disk 10, and a sliding bearing 20 connected to the anode target disk 10, wherein the sliding bearing 20 comprises: a bearing sleeve 201, a bearing core 202, a rotating flange 203, and a liquid metal 204. The bearing sleeve 201 is connected to the anode target disk 10 and is sleeved on the outer side of the bearing core 202 from the front end of the bearing core 202. The rotating flange 203 is sleeved on the outer side of the bearing core 202 and connected to the rear end of the bearing sleeve 201, thereby 201, a receiving cavity 205 for receiving liquid metal 204 is formed, and the liquid metal 204 is arranged in the receiving cavity 205, and also includes a screw 206 and a porous component 207, and the rear end of the bearing sleeve 201 is provided with a threaded hole 208 adapted to the screw 206, and the rotating flange 203 is provided with a mounting hole 209 corresponding to the threaded hole 208, wherein the screw 206 passes through the mounting hole 209 and is connected to the threaded hole 208, and connects the rotating flange 203 to the bearing sleeve 201, and the screw 206) is provided with a through hole 210 connected to the threaded hole 208; and the porous component 207 is inserted in the through hole 210, for releasing the air in the threaded hole 208 and blocking the leakage of the liquid metal 204.

[0044] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in the figure, the X-ray tube mainly includes a rotating anode target, a cathode opposite to the rotating anode target, and a housing for mounting the rotating anode target and cathode. The rotating anode target mainly includes an anode target 10 and a sliding bearing 20. The sliding bearing 20 mainly includes a bearing sleeve 201, a bearing core 202, a rotating flange 203, and liquid metal 204.

[0045] Specifically, to secure the bearing sleeve 201 to the rotating flange 203, a threaded hole 208 is defined at the rear end of the bearing sleeve 201, and a mounting hole 209 corresponding to the threaded hole 208 is defined at the rear end of the rotating flange 203. The threaded hole 208 and the mounting hole 209 are primarily used to mount the screw 206. The screw 206 has a vertical through-hole 210 extending therethrough, and the through-hole 210 of the screw 206 communicates with the threaded hole 208. A jackscrew 207 is mounted in the through-hole 210 of the screw 206. The porous component 207 is a rod-shaped component with multiple pores disposed therein, and its size is adapted to the size of the through-hole 210 of the screw 206. Furthermore, the multiple pores within the porous component 207 significantly increase its contact area. Consequently, the porous component 207 can release residual gas at the base of the threaded hole 208 and prevent leakage of the liquid metal 204.

[0046] When the rotating anode target disk starts working, the sliding bearing 20 drives the anode target disk 10 to rotate. Under the action of centrifugal force, the liquid metal 204 arranged in the accommodating chamber 205 tends to break away from the outside. However, since there is no exhaust hole on the side of the threaded hole 208, the liquid metal 204 will not break away from the outside. And since the porous component 207 installed in the through hole 210 of the screw 206 is provided with multiple pores, the gas in the X-ray tube can be discharged through the multiple pores of the porous component 207, thereby not affecting the vacuum degree inside the sliding bearing 20. In addition, since the multiple pores in the porous component 207 increase its contact area, the leakage of the liquid metal 204 can be effectively prevented.

[0047] Thus, the operations of providing a screw 206 with a vertical through hole 210, providing a threaded hole 208 and a mounting hole 209 that are of a size matching the screw 206, and providing a porous component 207 with multiple pores that can be mounted in the through hole 210 of the screw 206 achieve the technical effect of effectively preventing the leakage of liquid metal 204 while removing the residual gas at the root of the threaded hole 208 through the porous component 207, thereby solving the technical problem of being unable to avoid the leakage of liquid metal 204 while ensuring the vacuum degree in the X-ray tube.

[0048] According to another aspect of the embodiment of the present application, a liquid metal sliding bearing is further provided, comprising: a bearing sleeve 201, a bearing core 202, a rotating flange 203 and liquid metal 204, wherein the bearing sleeve 201 is connected to the anode target plate 10 and is sleeved on the outer side of the bearing core 202 from the front end of the bearing core 202, the rotating flange 203 is sleeved on the outer side of the bearing core 202 and connected to the rear end of the bearing sleeve 201, thereby forming a receiving cavity 205 for receiving the liquid metal 204 between the bearing core 202 and the bearing sleeve 201, and the liquid metal 204 is arranged in the receiving cavity 205. 5, further comprising a screw 206 and a porous component 207, and a threaded hole 208 adapted to the screw 206 is provided at the rear end of the bearing sleeve 201, and a mounting hole 209 corresponding to the threaded hole 208 is provided on the rotating flange 203, wherein the screw 206 passes through the mounting hole 209 and is connected to the threaded hole 208, and connects the rotating flange 203 to the bearing sleeve 201, and the screw 206 is provided with a through hole 210 communicated with the threaded hole 208; and the porous component 207 is inserted into the through hole 210 for releasing the air in the threaded hole 208 and preventing the leakage of the liquid metal 204.

[0049] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The liquid metal sliding bearing mainly includes a bearing sleeve 201, a bearing core 202, a rotating flange 203 and liquid metal 204. The rotating flange 203 is provided with a threaded hole 208.

[0050] Specifically, to secure the bearing sleeve 201 to the rotating flange 203, a threaded hole 208 is defined at the rear end of the bearing sleeve 201, and a mounting hole 209 corresponding to the threaded hole 208 is defined at the rear end of the rotating flange 203. The threaded hole 208 and the mounting hole 209 are primarily used to mount the screw 206. The screw 206 has a vertical through-hole 210 extending therethrough, and the through-hole 210 of the screw 206 communicates with the threaded hole 208. A jackscrew 207 is mounted in the through-hole 210 of the screw 206. The porous component 207 is a rod-shaped component with multiple pores disposed therein, and its size is adapted to the size of the through-hole 210 of the screw 206. Furthermore, the multiple pores within the porous component 207 significantly increase its contact area. Consequently, the porous component 207 can release residual gas at the base of the threaded hole 208 and prevent leakage of the liquid metal 204.

[0051] When the rotating anode target disk starts working, the sliding bearing 20 drives the anode target disk 10 to rotate. Under the action of centrifugal force, the liquid metal 204 arranged in the accommodating chamber 205 tends to break away from the outside. However, since there is no exhaust hole on the side of the threaded hole 208, the liquid metal 204 will not break away from the outside. And since the porous component 207 installed in the through hole 210 of the screw 206 is provided with multiple pores, the gas in the X-ray tube can be discharged through the multiple pores of the porous component 207, thereby not affecting the vacuum degree inside the sliding bearing 20. In addition, since the multiple pores in the porous component 207 increase its contact area, the leakage of the liquid metal 204 can be effectively prevented.

[0052] Thus, the operations of providing a screw 206 with a vertical through hole 210, providing a threaded hole 208 and a mounting hole 209 that are of a size matching the screw 206, and providing a porous component 207 with multiple pores that can be mounted in the through hole 210 of the screw 206 achieve the technical effect of effectively preventing the leakage of liquid metal 204 while removing the residual gas at the root of the threaded hole 208 through the porous component 207, thereby solving the technical problem of being unable to avoid the leakage of liquid metal 204 while ensuring the vacuum degree in the X-ray tube.

[0053] Optionally, the porous component 207 is a top wire 207 with a porous structure, and the top wire 207 is made of a material capable of reacting with the liquid metal 204 .

[0054] Specifically, the top wire 207 can be a rod-shaped component, and the top wire 207 can be made of copper, silver, gold, etc. When the liquid metal 204 enters the interior of the top wire 207, it will react with the top wire 207. Therefore, leakage of the liquid metal 204 can be avoided.

[0055] Optionally, the end surfaces of the rotating flange 203 and the screw 206 that abut against each other are respectively plated with a metal oxide film layer 211 .

[0056] Specifically, refer to Figure 5 As shown, to prevent liquid metal 204 from leaking through the gap between the contact surface of screw 206 and rotating flange 203, a film layer 211 is coated on the contacting end surfaces of rotating flange 203 and screw 206. Film layer 211 is a metal oxide, and can be a material such as aluminum oxide or titanium oxide. Thus, coating the contacting end surfaces of rotating flange 203 and screw 206 with film layer 211 achieves the technical effect of preventing liquid metal 204 from leaking through the gap between the contact surface of screw 206 and rotating flange 203.

[0057] Optionally, a welding portion 212 welded along the outer sides of the bearing sleeve 201 and the rotating flange 203 is provided at the abutting position between the bearing sleeve 201 and the rotating flange 203 .

[0058] Specifically, refer to Figure 7 As shown, a weld portion 212 is machined at the position where the bearing sleeve 201 abuts the rotating flange 203. Thus, the operation of providing the weld portion 212 welded along the outer sides of the bearing sleeve 201 and the rotating flange 203 at the abutment position of the bearing sleeve 201 and the rotating flange 203 can achieve the technical effect of increasing the connection strength between the bearing sleeve 201 and the rotating flange 203 and preventing the liquid metal 204 from leaking out of the gap at the contact surface between the bearing sleeve 201 and the rotating flange 203.

[0059] Optionally, a concave cavity 213 is provided on the inner surface of the rotating flange 203 opposite to the bearing core 202. Thus, when liquid metal leaks outward along the gap between the bearing core 202 and the rotating flange 203, it will first fill the concave cavity 213, thereby effectively preventing the liquid metal from further leaking outward.

[0060] Therefore, the technical solution of this embodiment solves the above-mentioned technical problems existing in the prior art. This embodiment is applicable to a rotating anode target, an X-ray tube, and a liquid metal sliding bearing in the field of mechanical parts processing technology, and has the following advantages:

[0061] 1. The top screw of the present invention is provided with multiple pores, and the residual gas at the root of the threaded hole can be discharged through the multiple pores of the top screw;

[0062] 2. The top screw of the present invention is provided with multiple pores, which increase the contact area of the top screw, thereby effectively preventing liquid metal leakage;

[0063] 3. The bottom of the rotating flange of the present invention is provided with a membrane layer, which can effectively prevent liquid metal from leaking through the gap between the screw and the rotating flange;

[0064] 4. The bearing sleeve and the rotating flange in the present invention are connected together by welding, which can not only increase the connection strength between the bearing sleeve and the rotating flange, but also prevent liquid metal from leaking from the contact surface between the bearing sleeve and the rotating flange.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0068] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A rotating anode target, comprising: An anode target disk (10), and a sliding bearing (20) connected to the anode target disk (10), wherein the sliding bearing (20) comprises: a bearing outer sleeve (201), a bearing core (202), a rotating flange (203) and liquid metal (204), wherein The bearing sleeve (201) is connected to the anode target plate (10) and is sleeved on the outer side of the bearing core (202) from the front end of the bearing core (202); the rotating flange (203) is sleeved on the outer side of the bearing core (202) and connected to the rear end of the bearing sleeve (201), thereby forming a receiving cavity (205) for receiving the liquid metal (204) between the bearing core (202) and the bearing sleeve (201), and the liquid metal (204) is arranged in the receiving cavity (205), characterized in that: Also included are a screw (206) and a porous member (207), and The rear end of the bearing sleeve (201) is provided with a threaded hole (208) adapted to the screw (206), and the rotating flange (203) is provided with a mounting hole (209) corresponding to the threaded hole (208), wherein The screw (206) passes through the mounting hole (209) and is connected to the threaded hole (208), thereby connecting the rotating flange (203) to the bearing sleeve (201), and the screw (206) is provided with a through hole (210) communicating with the threaded hole (208); and The porous component (207) is inserted into the through hole (210) to release the air in the threaded hole (208) and prevent the leakage of the liquid metal (204), wherein the porous component (207) is a top screw (207) with a porous structure, the top screw (207) is made of a material that can react with the liquid metal (204), and the top screw (207) is copper, silver or gold.

2. The rotating anode target according to claim 1, wherein: The end surfaces of the rotating flange (203) and the screw (206) that abut against each other are respectively plated with a metal oxide film layer (211).

3. The rotating anode target according to claim 1, wherein: A welding portion (212) welded along the outer sides of the bearing sleeve (201) and the rotating flange (203) is provided at the abutting position between the bearing sleeve (201) and the rotating flange (203).

4. The rotating anode target according to claim 1, wherein: A concave cavity (213) is provided on the inner surface of the rotating flange (203) opposite to the bearing core (202).

5. An X-ray tube comprising: A rotating anode target disk, a cathode arranged opposite to the rotating anode target disk, and a shell connected to the rotating anode target disk and the cathode respectively, wherein the rotating anode target disk comprises: an anode target disk (10), and a sliding bearing (20) connected to the anode target disk (10), wherein the sliding bearing (20) comprises: a bearing sleeve (201), a bearing core (202), a rotating flange (203) and liquid metal (204), wherein The bearing sleeve (201) is connected to the anode target plate (10) and is sleeved on the outer side of the bearing core (202) from the front end of the bearing core (202); the rotating flange (203) is sleeved on the outer side of the bearing core (202) and connected to the rear end of the bearing sleeve (201), thereby forming a receiving cavity (205) for receiving the liquid metal (204) between the bearing core (202) and the bearing sleeve (201), and the liquid metal (204) is arranged in the receiving cavity (205), characterized in that: Also included are a screw (206) and a porous member (207), and The rear end of the bearing sleeve (201) is provided with a threaded hole (208) adapted to the screw (206), and the rotating flange (203) is provided with a mounting hole (209) corresponding to the threaded hole (208), wherein The screw (206) passes through the mounting hole (209) and is connected to the threaded hole (208), thereby connecting the rotating flange (203) to the bearing sleeve (201), and the screw (206) is provided with a through hole (210) communicating with the threaded hole (208); and The porous component (207) is inserted into the through hole (210) to release the air in the threaded hole (208) and prevent the leakage of the liquid metal (204), wherein the porous component (207) is a top screw (207) with a porous structure, the top screw (207) is made of a material that can react with the liquid metal (204), and the top screw (207) is copper, silver or gold.

6. A liquid metal sliding bearing comprising: A bearing outer sleeve (201), a bearing core (202), a rotating flange (203) and liquid metal (204), wherein The bearing sleeve (201) is sleeved on the outer side of the bearing core (202) from the front end of the bearing core (202), and the rotating flange (203) is sleeved on the outer side of the bearing core (202) and connected to the rear end of the bearing sleeve (201), so that a receiving cavity (205) for receiving the liquid metal (204) is formed between the bearing core (202) and the bearing sleeve (201), and the liquid metal (204) is arranged in the receiving cavity (205), characterized in that: Also included are a screw (206) and a porous member (207), and The rear end of the bearing sleeve (201) is provided with a threaded hole (208) adapted to the screw (206), and the rotating flange (203) is provided with a mounting hole (209) corresponding to the threaded hole (208), wherein The screw (206) passes through the mounting hole (209) and is connected to the threaded hole (208), thereby connecting the rotating flange (203) to the bearing sleeve (201), and the screw (206) is provided with a through hole (210) communicating with the threaded hole (208); and The porous component (207) is inserted into the through hole (210) to release the air in the threaded hole (208) and prevent the leakage of the liquid metal (204), wherein the porous component (207) is a top screw (207) with a porous structure, the top screw (207) is made of a material that can react with the liquid metal (204), and the top screw (207) is copper, silver or gold.

7. The liquid metal sliding bearing according to claim 6, characterized in that: The end surfaces of the rotating flange (203) and the screw (206) that abut against each other are respectively plated with a metal oxide film layer (211).

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