CN214753637U

CN214753637U - Anode assembly of X-ray tube and X-ray tube

Info

Publication number: CN214753637U
Application number: CN202121514273.XU
Authority: CN
Inventors: 刘灿彬; 聂西鹏; 周奇
Original assignee: Siemens X Ray Vacuum Technology Ltd
Current assignee: Siemens X Ray Vacuum Technology Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-11-16
Anticipated expiration: 2031-07-05

Abstract

An anode assembly for an X-ray tube comprises an anode target disk (10), an anode bearing (20), an anode rotor (30) and an insulating disk (50). The anode target disk is used for receiving electron beam bombardment. The anode bearing has a rotating shaft (21) which rotatably supports the anode target disk. The anode rotor includes a connecting shaft portion (31) and a copper sheath portion (35)_。One end of the connecting shaft part is fixedly connected with the anode target disc, and the other end of the connecting shaft part is fixedly connected with the rotating shaft. The copper sleeve part is sleeved on the anode bearing, and one axial end of the copper sleeve part is connected to the connecting shaft part. The heat insulation disc is coaxially sleeved on the connecting shaft part and is positioned between the anode target disc and the anode bearing along the axial direction of the connecting shaft part, and the heat insulation disc can prevent the anode target disc from moving towards the copper sleeve partAnd heat radiated from the anode bearing. The anode assembly can effectively reduce the heat transferred to the anode bearing in the form of thermal radiation. The utility model also provides an X-ray tube that has above-mentioned anode assembly.

Description

Anode assembly of X-ray tube and X-ray tube

Technical Field

The present invention relates to an anode assembly, in particular an anode assembly for an X-ray tube of an X-ray tube, and to an X-ray tube having such an anode assembly.

Background

When the X-ray tube is in a working state, a large amount of heat energy can be generated on the anode target disc and is transferred to the copper sleeve part and the anode bearing in a heat conduction and heat radiation mode, and finally the temperature of the metal ball of the anode bearing is increased to damage the coating on the surface of the metal ball, so that the service life of the anode bearing is influenced, the service life of the whole X-ray tube is further influenced, and meanwhile, the continuous loading power of the whole X-ray tube is also limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anode assembly of X-ray tube can effectively reduce the heat of transmitting for the anode bearing through the heat radiation form, promotes anode bearing and X-ray tube's life-span to it is higher to make the loaded power in succession of X-ray tube.

Another object of the present invention is to provide an X-ray tube, which can effectively reduce the heat transmitted to the anode bearing through the heat radiation form, improve the life of the anode bearing and the X-ray tube, and make the power of the X-ray tube continuously loaded higher.

The utility model provides an anode assembly of an X-ray tube, which comprises an anode target disc, an anode bearing, an anode rotor and a heat insulation disc. The anode target disk is used for receiving electron beam bombardment and generating X-rays. The anode bearing has a rotating shaft capable of rotatably supporting the anode target disk. The anode rotor includes a connecting shaft portion and a copper sleeve portion. One axial end of the connecting shaft is coaxially and fixedly connected with the anode target disc, and the other axial end of the connecting shaft is coaxially and fixedly connected with the rotating shaft. The copper sleeve part is sleeved on the anode bearing and one axial end of the copper sleeve part is fixedly connected with the connecting shaft part. The heat insulation disc is coaxially sleeved on the connecting shaft part and is positioned between the anode target disc and the anode bearing along the axial direction of the connecting shaft part, and the heat insulation disc can block heat radiated from the anode target disc to the copper sleeve part and the anode bearing.

The utility model provides an X-ray tube's positive pole subassembly on current positive pole subassembly's structure basis, sets up thermal-insulated dish between positive pole target dish and positive pole bearing, utilizes thermal-insulated dish to block the heat that positive pole target dish radiated to copper sheathing portion and positive pole bearing. Therefore, the heat transmitted to the anode bearing in a heat radiation mode is effectively reduced with lower modification cost, the metal ball of the anode bearing is prevented from exceeding the limit working temperature, the service lives of the anode bearing and the X-ray tube are prolonged, and the power of the X-ray tube capable of being continuously loaded is higher.

In a further exemplary embodiment of the anode assembly of the X-ray tube, the side of the thermally insulating disk facing the anode target disk is a mirror surface capable of reflecting heat. The heat that the heat insulating dish can radiate the positive pole target dish through the mirror surface reflection, further reduces the heat that copper sheathing portion and positive pole bearing absorbed.

In a further exemplary embodiment of the anode assembly of the X-ray tube, a side of the thermally insulating disk facing the anode bearing and the copper sleeve portion is blackened. The blackening treatment can improve the heat radiation capability of the heat insulation disc, and radiate a large amount of heat absorbed by the heat insulation disc from the anode target disc to the tube wall of the X-ray tube, thereby reducing the heat conducted by the heat insulation disc to the copper sleeve part and the anode bearing.

In another exemplary embodiment of an anode assembly of an X-ray tube, an end face of the anode target disk adjacent to the anode bearing and the copper sleeve portion is gradually distanced from the anode bearing and the copper sleeve portion in an axial direction of the connecting shaft portion from the inside to the outside in a radial direction thereof. Borrow this can increase the distance of positive pole target disc and positive pole bearing and copper sheathing portion, reduce the heat that positive pole target disc radiated to positive pole bearing and copper sheathing portion.

In another exemplary embodiment of the anode assembly of the X-ray tube, part or all of the thermally insulating disk is gradually distanced from the anode bearing and the copper sleeve portion in the axial direction of the connecting shaft portion from the inside to the outside in the radial direction thereof. Thereby increasing the surface area of the heat-insulating disk without changing the diameter of the heat-insulating disk, thereby more efficiently blocking the heat radiated from the anode target disk to the copper sleeve portion and the anode bearing.

In another exemplary embodiment of an anode assembly of an X-ray tube, the connecting shaft portion extends radially outward at one end of the fixed connecting shaft to form a first connecting portion, the first connecting portion is formed with a plurality of first through holes parallel to an axial direction of the connecting shaft portion, the rotating shaft extends radially outward at one end of the fixed connecting shaft to form a second connecting portion, and the anode assembly further includes a plurality of first fixing bolts, each of which is inserted into the first through hole and is fixed to the second connecting portion by a thread. Thereby facilitating the coupling assembly of the coupling shaft portion and the rotating shaft.

In another exemplary embodiment of the anode assembly of the X-ray tube, the heat insulating disk is formed with a plurality of second through holes parallel to the axial direction of the connecting shaft portion, and the anode assembly further includes a plurality of second fixing bolts, each of which is inserted into the second through hole and is fixed to the first connecting portion by a thread. Thereby facilitating the coupling assembly of the coupling shaft portion and the heat insulating disk.

In another exemplary embodiment of the anode assembly of the X-ray tube, the heat shield disk is formed with a plurality of support collars protruding on a surface facing the first connection portion, the support collars surrounding the second through holes, respectively. Thereby reducing the contact area of the heat insulation disc and the first connecting part, and reducing the heat conducted by the heat insulation disc to the copper sleeve part and the anode bearing.

In another exemplary embodiment of the anode assembly of the X-ray tube, the anode assembly further comprises a heat insulating pad, which is sleeved on the connecting shaft portion and located between the heat insulating disk and the first connecting portion in an axial direction of the connecting shaft portion, the heat insulating pad being made of a material with low thermal conductivity and capable of blocking the heat conducting from the heat insulating disk to the first connecting portion. Thereby avoiding the contact between the heat insulation disc and the first connecting part, and reducing the heat conducted by the heat insulation disc to the copper sleeve part and the anode bearing.

The utility model also provides an X-ray tube, including foretell anode assembly.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is an exploded schematic view of an exemplary embodiment of an anode assembly for an X-ray tube.

Fig. 2 is an assembly structure diagram of an anode assembly of an X-ray tube.

Fig. 3 is a schematic cross-sectional view of an anode assembly of the X-ray tube of fig. 2.

Fig. 4 is a cross-sectional schematic view of another illustrative embodiment of an anode assembly of an X-ray tube.

Description of the reference symbols

10 anode target disc

20 anode bearing

21 rotating shaft

22 second connection part

30 anode rotor

31 connecting shaft portion

32 first connection part

33 first through hole

35 copper sleeve part

50 heat insulation disc

52 second through hole

53 support convex ring

60 first fixing bolt

70 second fixing bolt

80 Heat insulation pad

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals in the drawings denote the same or similar components.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

Fig. 1 is an exploded schematic view of an exemplary embodiment of an anode assembly for an X-ray tube. Fig. 2 is an assembly structure diagram of an anode assembly of an X-ray tube. Referring to fig. 1 and 2, an anode assembly of an X-ray tube includes an anode target disk 10, an anode bearing 20, an anode rotor 30, and an insulating disk 50.

The anode target disk 10 is adapted to receive electron beam bombardment and to generate X-rays. The anode bearing 20 has a rotating shaft 21 that rotatably supports the anode target disk 10. The anode bearing 20 further includes metal balls for supporting the rotating shaft 21, and the surfaces of the metal balls are usually plated with silver or lead, and if the temperature of the metal balls is too high, the silver or lead plating on the surfaces may melt and fail.

Fig. 3 is a schematic cross-sectional view of an anode assembly of the X-ray tube of fig. 2. Referring to fig. 1 to 3, the anode rotor 30 includes a connecting shaft portion 31 and a copper bush portion 35. One axial end of the connecting shaft 31 is coaxially fixed to the anode target disk 10, and the other axial end of the connecting shaft 31 is coaxially fixed to the rotating shaft 21. The copper sleeve portion 35 is fitted over the anode bearing 20 and has one axial end connected to the connecting shaft portion 31. The heat insulating disk 50 is coaxially fitted over the connecting shaft portion 31 and is located between the anode target disk 10 and the anode bearing 20 in the axial direction of the connecting shaft portion 31, and the diameter of the heat insulating disk 50 is set according to the sizes of the anode target disk 10 and the copper bush portion 35, so that the heat insulating disk 50 can block heat radiated from the anode target disk 10 to the copper bush portion 35 and the anode bearing 20.

The utility model provides an X-ray tube's anode assembly on current anode assembly's structure basis, sets up thermal-insulated dish 50 between positive pole target dish 10 and anode bearing 20, utilizes thermal-insulated dish 50 to block the heat that positive pole target dish 10 radiated to copper sheathing portion 35 and anode bearing 20. Therefore, the heat transmitted to the anode bearing in a heat radiation mode is effectively reduced with lower modification cost, the metal ball of the anode bearing is prevented from exceeding the limit working temperature, the service lives of the anode bearing and the X-ray tube are prolonged, and the power of the X-ray tube capable of being continuously loaded is higher.

In the exemplary embodiment, the side of the heat shield disk 50 facing the anode target disk 10 is a mirror surface that reflects heat. The mirror surface may be formed by polishing the surface of the heat insulating plate 50 directly or by coating the surface of the heat insulating plate 50 with a film. The heat shield 50 can further reduce the amount of heat absorbed by the copper sleeve 35 and the anode bearing 20 by reflecting the heat radiated from the anode target disk 10 back to the anode target disk 10 or the tube wall of the X-ray tube through the mirror surface.

In the exemplary embodiment, a surface of the heat insulating plate 50 facing the anode bearing 20 and the copper bush portion 35 is subjected to blackening treatment such as plating. The blackening process can change the surface of the heat insulating disk 50 to black to improve heat radiation capability, and radiate a large amount of heat absorbed by the heat insulating disk 50 from the anode target disk 10 to the tube wall of the X-ray tube, thereby reducing the amount of heat conducted from the heat insulating disk 50 to the copper bush portion 35 and the anode bearing 20.

In the exemplary embodiment, referring to fig. 3, the end surface of the anode target disk 10 close to the anode bearing 20 and the copper bush portion 35 is gradually apart from the anode bearing 20 and the copper bush portion 35 in the axial direction of the connecting shaft portion 31 from the inside to the outside in the radial direction thereof. Thereby, the distance between the anode target disk 10 and the anode bearing 20 and the copper bush portion 35 can be increased, and the amount of heat radiated from the anode target disk 10 to the anode bearing 20 and the copper bush portion 35 can be reduced.

In the illustrated embodiment, referring to fig. 3, the outer edge of the heat insulating disk 50 gradually moves away from the anode bearing 20 and the copper bush portion 35 in the axial direction of the connecting shaft portion 31 from inside to outside along the heat insulating disk 50 in the radial direction thereof. Thereby increasing the surface area of the insulating disk 50 without changing the diameter of the insulating disk 50 and thereby more efficiently blocking the heat radiated from the anode target disk 10 to the copper sleeve 35 and the anode bearing 20.

In the illustrated embodiment, referring to fig. 1 to 3, the connecting shaft portion 31 is formed to extend radially outward at one end fixedly connected to the rotating shaft 21 to form a first connecting portion 32, and the first connecting portion 32 is formed with a plurality of first through holes 33 penetrating in parallel to the axial direction of the connecting shaft portion 31. The rotating shaft 21 is extended radially outwardly at one end of the fixedly coupled shaft portion 31 to form a second coupling portion 22. The anode assembly further includes a plurality of first fixing bolts 60, and each first fixing bolt 60 is inserted into the first through hole 33 and fixed to the second connecting portion 22 by a thread. Thereby facilitating the coupling assembly of the coupling shaft portion 31 and the rotating shaft 21.

In the exemplary embodiment, referring to fig. 3, the heat insulating disk 50 is formed with a plurality of second through holes 52 penetrating in parallel to the axial direction of the connecting shaft portion 31. The anode assembly further includes a plurality of second fixing bolts 70, and each second fixing bolt 70 is inserted into the second through hole 52 and is fixed to the first connecting portion 32 by a screw. Thereby facilitating the coupling assembly of the coupling shaft portion 31 and the thermal insulation disk 50. The heat insulating plate 50 has a plurality of support rings 53 formed on a surface thereof facing the first coupling portion 32 to surround the second through holes 52. When the second fixing bolt 70 is coupled to the first coupling portion 32, the heat insulating disk 50 abuts against the first coupling portion 32 through the support protrusion ring 53, thereby reducing a contact area of the heat insulating disk 50 and the first coupling portion 32, and thus reducing heat conducted from the heat insulating disk 50 to the copper sheathing portion 35 and the anode bearing 20.

Fig. 4 is a cross-sectional schematic view of another illustrative embodiment of an anode assembly of an X-ray tube. Referring to fig. 4, the same or similar parts as those of the anode assembly in fig. 3 are not described again, except that the heat insulation disc 50 does not include the supporting convex ring 53, but instead the anode assembly further includes a heat insulation pad 80 sleeved on the connecting shaft portion 31 and located between the heat insulation disc 50 and the first connecting portion 32 along the axial direction of the connecting shaft portion 31, wherein the heat insulation pad 80 is made of a material with low thermal conductivity and can block the heat conduction of the heat insulation disc 50 to the first connecting portion 32. Thereby avoiding contact between the insulating disk 50 and the first connecting portion 32 and thereby reducing the amount of heat conducted from the insulating disk 50 to the copper sheathing portion 35 and the anode bearing 20.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above list of details is only for the practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of the features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.

Claims

An anode assembly for an X-ray tube, comprising:

an anode target disk (10) for receiving the electron beam bombardment and generating X-rays;

an anode bearing (20) having a rotating shaft (21) rotatably supporting the anode target disk (10);

an anode rotor (30) comprising:

a connecting shaft portion (31) having one axial end fixedly connected to the anode target disk (10) coaxially and the other axial end of the connecting shaft portion (31) fixedly connected to the rotary shaft (21) coaxially, and

a copper sleeve portion (35) which is fitted over the anode bearing (20) and has one axial end connected to the connecting shaft portion (31); and

a heat insulating disk (50) coaxially fitted over the connecting shaft portion (31) and located between the anode target disk (10) and the anode bearing (20) in the axial direction of the connecting shaft portion (31), the heat insulating disk (50) being capable of blocking heat radiated from the anode target disk (10) to the copper fitting portion (35) and the anode bearing (20).
2. Anode assembly for an X-ray tube according to claim 1, characterized in that the side of the thermally insulating disk (50) facing the anode target disk (10) is a mirror surface capable of reflecting heat.
3. Anode assembly for an X-ray tube according to claim 1, characterized in that the side of the thermally insulating disc (50) facing the anode bearing (20) and the copper sleeve portion (35) is blackened.
4. Anode assembly for an X-ray tube according to claim 1, wherein the end face of the anode target disk (10) close to the anode bearing (20) and the copper sleeve portion (35) is gradually distanced from the anode bearing (20) and the copper sleeve portion (35) in the axial direction of the connecting shaft portion (31) from the inside to the outside in the radial direction thereof.
5. Anode assembly for an X-ray tube according to claim 4, characterized in that part or all of the thermally insulating disk (50) is gradually distanced from the anode bearing (20) and the copper sleeve portion (35) in the axial direction of the connecting shaft portion (31) from the inside to the outside in the radial direction thereof.
6. The anode assembly for an X-ray tube according to claim 1, wherein the connecting shaft portion (31) is formed to extend radially outward at an end fixedly connected to the rotating shaft (21) to form a first connecting portion (32), the first connecting portion (32) is formed with a plurality of first through holes (33) extending parallel to an axial direction of the connecting shaft portion (31), the rotating shaft (21) is formed to extend radially outward at an end fixedly connected to the connecting shaft portion (31) to form a second connecting portion (22), the anode assembly further comprises a plurality of first fixing bolts (60), and each of the first fixing bolts (60) is inserted into the first through hole (33) and is fixed to the second connecting portion (22) by a screw.
7. The anode assembly for an X-ray tube according to claim 6, wherein the heat insulating disk (50) is formed with a plurality of second through holes (52) extending in parallel with an axial direction of the connecting shaft portion (31), and the anode assembly further comprises a plurality of second fixing bolts (70), each of the second fixing bolts (70) being inserted through the second through hole (52) and being screwed to the first connecting portion (32).
8. Anode assembly for an X-ray tube according to claim 7, characterized in that the thermally insulating disk (50) is formed, on the side facing the first connection portion (32), with a plurality of raised support rings (53) surrounding the second through-hole (52) respectively.
9. The anode assembly for an X-ray tube according to claim 7, further comprising a heat insulating pad (80) fitted around said connection shaft portion (31) and located between said heat insulating disk (50) and said first connection portion (32) in the axial direction of said connection shaft portion (31), said heat insulating pad (80) being composed of a material having a low thermal conductivity and being capable of blocking said heat insulating disk (50) from conducting heat to said first connection portion (32).
An X-ray tube characterized by comprising an anode assembly according to any one of claims 1 to 9.