CN117711891A - Bearing for X-ray tube - Google Patents
Bearing for X-ray tube Download PDFInfo
- Publication number
- CN117711891A CN117711891A CN202311703640.4A CN202311703640A CN117711891A CN 117711891 A CN117711891 A CN 117711891A CN 202311703640 A CN202311703640 A CN 202311703640A CN 117711891 A CN117711891 A CN 117711891A
- Authority
- CN
- China
- Prior art keywords
- bearing
- ray tube
- ball
- core
- tube according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims 2
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005461 Bremsstrahlung Effects 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
The invention discloses a bearing for an X-ray tube, which comprises a bearing core and a bearing sleeve, wherein at least one ball bearing is arranged between the bearing core and the bearing sleeve, the bearing for the X-ray tube further comprises at least one pair of sealing rings, the ball bearing comprises an outer ring and a plurality of ceramic balls, the ceramic balls are in rolling connection between the outer ring and the bearing core, one side of the outer ring, which is far away from the ceramic balls, is in interference fit with the bearing sleeve, the pair of sealing rings are respectively abutted with two sides of the outer ring, a sealing space for accommodating the ceramic balls is jointly formed among the pair of sealing rings, the outer ring and the bearing core, and liquid metal is filled in the sealing space so as to improve the heat dissipation efficiency of the bearing and reduce the working noise of the bearing. The bearing provided by the invention has good heat dissipation effect, supports the temperature generated by the X-ray tube for realizing higher exposure power and longer exposure time, prolongs the service life of the bearing, and reduces the working noise.
Description
Technical Field
The invention relates to the technical field of X-ray tubes, in particular to a bearing for an X-ray tube.
Background
The X-ray tube comprises a cathode and an anode which are positioned in a high vacuum closed shell, and electrons of the cathode of the X-ray tube bombard an anode target disk at a high speed under the action of a high-voltage electric field, so that bremsstrahlung and characteristic radiation are generated, and X-rays are formed. In the process of generating the X-rays, only 1% of the kinetic energy of electrons is converted into X-rays, and more than 99% of the kinetic energy is converted into heat energy. Even temperatures of 2600-2700 ℃ can be reached in the electron bombardment zone, so that an anode assembly capable of rotating at high rotational speeds is required to allow the cathodic electrons to bombard an endless track belt of the anode target disk. The anode assembly structure is typically supported by ball bearings and rotates at high speed driven by stator coils to distribute the heat generated at the focal track. In some high-end medical X-ray imaging systems, exposure at higher power and higher rotational speeds is required, which places stringent demands on the ball bearings.
Currently, a ball bearing scheme is commonly adopted as a bearing for an X-ray tube, in order to realize the anode conductive function, balls are made of steel materials, and silver plating or lead plating technology is adopted on the surfaces of the balls. The technology of coating the coating on the surface of the steel ball is complex, uneven thickness of the coating is easy to cause, the coating is easy to fall off in the high-speed rotation process of the bearing, the ball bearing cannot bear too high working temperature because the coating is provided with the coating, otherwise, the coating is easy to fall off to cause the dead failure of the bearing, the working principle of the X-ray tube determines that the ball bearing is in a high-temperature working environment for a long time, in addition, the heat dissipation effect inside the bearing is greatly reduced because of the existence of the balls in the ball bearing, so the lead-plated or silver-plated ball bearing used at present cannot support the temperature generated by the X-ray tube for realizing higher exposure power and longer exposure time, and the defects of short service life, high working noise and the like are overcome.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the bearing for the X-ray tube, which has good heat dissipation effect, supports the temperature generated by the X-ray tube for realizing higher exposure power and longer exposure time, prolongs the service life of the bearing, and reduces the working noise.
The invention is realized by the following technical scheme:
the utility model provides a bearing for X-ray tube, includes bearing core and bearing housing, be provided with at least one ball bearing between bearing core and the bearing housing, bearing for X-ray tube still includes a pair of sealing ring, ball bearing includes outer lane and a plurality of ceramic ball, a plurality of ceramic ball roll connection be in the outer lane with between the bearing core, the outer lane keep away from one side of ceramic ball with the bearing housing interference fit, a pair of the sealing ring respectively with the both sides butt of outer lane, and a pair of jointly form between sealing ring, outer lane and the bearing housing and be used for holding ceramic ball's sealed space, the sealed space intussuseption is filled with liquid metal in order to improve the radiating efficiency of bearing reduces simultaneously bearing operating noise.
Furthermore, a micro gap is formed between the sealing ring and the bearing core, and a special coating is coated on one side of the sealing ring, which is close to the bearing core, so as to avoid overflow of liquid metal in the sealing space.
Further, a first annular groove is formed in the bearing core, and the ceramic balls are at least partially accommodated in the first annular groove.
Further, a second annular groove is formed in the outer ring, and the ceramic balls are at least partially accommodated in the second annular groove.
Further, the at least one ball bearing comprises two ball bearings, the two ball bearings are respectively located at the first end and the second end of the bearing core, the bearing for the X-ray tube further comprises a supporting piece, and two ends of the supporting piece are respectively abutted with the two ball bearings.
Further, the bearing sleeve is provided with a mounting groove, the bearing core is at least partially accommodated in the mounting groove, the first end of the bearing core is close to the bottom wall of the mounting groove, and the second end of the bearing core is far away from the bottom wall of the mounting groove.
Further, the bearing for the X-ray tube further comprises an elastic gasket, one side of the elastic gasket is abutted with the bottom wall of the mounting groove, and the other end of the elastic gasket is abutted with the ball bearing at the first end.
Further, the bearing for the X-ray tube further comprises a retainer ring, wherein the retainer ring is clamped with the bearing sleeve, and the retainer ring is abutted with the ball bearing at the second end.
Furthermore, a storage groove is formed in the inner side wall of the mounting groove, and the retainer ring is at least partially clamped in the storage groove.
Compared with the prior art, the invention has the advantages that:
1. the ceramic ball working area is sealed, and liquid metal is poured into the sealing area to realize the lubrication function required by the ball bearing working in the X-ray tube, so that the noise generated by the bearing working is reduced. Meanwhile, the contact area between the bearing core and the outer ring is increased by the liquid metal, namely the heat conduction area between the bearing core and the bearing sleeve is indirectly increased, and heat generated by the anode can be transferred to an insulating medium outside the bearing sleeve more quickly, so that the heat dissipation effect of the bearing is greatly increased through heat exchange, the bearing supports the temperature generated by the X-ray tube to realize higher exposure power and longer exposure time, and the service life of the bearing is prolonged.
2. The ball made of ceramic material is adopted, the surface of the ball is not required to be coated with a plating layer, and compared with the steel ball, the ceramic ball has higher temperature resistance and wear resistance and can bear higher working temperature.
Drawings
FIG. 1 is a schematic view of a bearing for an X-ray tube according to an embodiment of the present invention;
FIG. 2 is a front view of a bearing for an X-ray tube according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is an enlarged view of a portion B in fig. 3.
1. A bearing core; 10. a first annular groove; 11. a first end; 12. a second end; 2. a bearing sleeve; 20. a mounting groove; 200. a bottom wall; 201. an inner sidewall; 202. a storage groove; 3. a ball bearing; 30. an outer ring; 300. a second annular groove; 31. ceramic balls; 4. a seal ring; 5. sealing the space; 6. a support; 7. an elastic pad; 8. and (5) a retainer ring.
Detailed Description
The technical scheme of the invention is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 4, a bearing for an X-ray tube according to an embodiment of the present invention includes a bearing core 1, a bearing housing 2, and at least one pair of seal rings 4, wherein at least one ball bearing 3 is disposed between the bearing core 1 and the bearing housing 2, the bearing core 1 is rotatably connected to the bearing housing 2 through the ball bearing 3, and the pair of seal rings 4 are abutted against both sides of the ball bearing 3.
The ball bearing 3 comprises an outer ring 30 and a plurality of ceramic balls 31, the ceramic balls 31 are in rolling connection between the outer ring 30 and the bearing core 1, one side, away from the ceramic balls 31, of the outer ring 30 is in interference fit with the bearing sleeve 2, a pair of sealing rings 4 are respectively in butt joint with two sides of the outer ring 30, a sealing space 5 for accommodating the ceramic balls 31 is formed among the pair of sealing rings 4, the outer ring 30 and the bearing core 1, and liquid metal is filled in the sealing space 5 to improve the heat dissipation efficiency of the bearing and reduce the working noise of the bearing. It should be noted that the ball may be made of high-temperature resistant and high-strength materials such as high-chromium steel or high-molecular materials.
A micro gap is formed between the sealing ring 4 and the bearing core 1, and a special coating is coated on one side of the sealing ring 4 close to the bearing core 1 to avoid overflow of liquid metal in the sealing space 5, in this embodiment, the special coating may be an alumina coating or a ceramic coating.
The bearing core 1 is provided with a first annular groove 10, a plurality of ceramic balls 31 are at least partially accommodated in the first annular groove 10, the outer ring 30 is provided with a second annular groove 300, and a plurality of ceramic balls 31 are at least partially accommodated in the second annular groove 300.
In this embodiment, the at least one ball bearing 3 comprises two ball bearings 3, the two ball bearings 3 are respectively located at the first end 11 and the second end 12 of the bearing core 1, the bearing for the X-ray tube further comprises a support member 6, and two ends of the support member 6 are respectively abutted with the two ball bearings 3. Specifically, both ends of the support 6 are respectively abutted against the seal rings 4 on the side of the ball bearing 3. Of course, the number of the ball bearings 3 may be three, four, or the like, and an appropriate number of the ball bearings 3 may be selected according to the length of the overlapping portion of the bearing core 1 and the bearing housing 2.
The bearing housing 2 is provided with a mounting groove 20, the bearing core 1 is at least partially accommodated in the mounting groove 20, the first end 11 of the bearing core 1 is arranged close to the bottom wall 200 of the mounting groove 20, and the second end 12 of the bearing core 1 is arranged far away from the bottom wall 200 of the mounting groove 20.
The bearing for the X-ray tube further comprises an elastic gasket 7, one side of the elastic gasket 7 is abutted against the bottom wall 200 of the mounting groove 20, the other end is abutted against the ball bearing 3 positioned at the first end 11, and the elastic gasket 7 is used for limiting the ball bearing 3 positioned at the first end 11.
The bearing for the X-ray tube further comprises a retainer ring 8, the retainer ring 8 is clamped with the bearing sleeve 2, the retainer ring 8 is abutted with the ball bearing 3 located at the second end 12, and the retainer ring 8 is used for limiting the ball bearing 3 located at the second end 12.
Specifically, the inner sidewall 201 forming the mounting groove 20 is provided with a receiving groove 202, and the retainer ring 8 is at least partially clamped in the receiving groove 202.
The invention has the following beneficial effects:
1. by sealing the working area of the ceramic ball 31 and pouring liquid metal into the sealing area, the lubrication function required by the ball bearing 3 working in the X-ray tube is realized, and the noise generated by the bearing working is reduced. Meanwhile, the contact area between the bearing core 1 and the outer ring 30 is increased by the liquid metal, namely, the heat conduction area between the bearing core 1 and the bearing sleeve 2 is indirectly increased, and heat generated by an anode can be transferred to an insulating medium outside the bearing sleeve 2 more quickly, so that the heat dissipation effect of the bearing is greatly increased through heat exchange, the bearing supports the temperature generated by the X-ray tube to realize higher exposure power and longer exposure time, and the service life of the bearing is prolonged.
2. The ceramic ball 31 has higher temperature resistance and wear resistance and can bear higher working temperature than the steel ball without coating the surface of the ball with a coating.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The utility model provides a bearing for X-ray tube, includes bearing core (1) and bearing housing (2), be provided with at least one ball bearing (3) between bearing core (1) and bearing housing (2), its characterized in that, bearing for X-ray tube still includes a pair of sealing ring (4), ball bearing (3) include outer lane (30) and a plurality of ceramic ball (31), a plurality of ceramic ball (31) roll connection are in outer lane (30) with between bearing core (1), one side of ceramic ball (31) is kept away from in outer lane (30) with bearing housing (2) interference fit, a pair of sealing ring (4) respectively with both sides butt of outer lane (30), and a pair of sealing ring (4), outer lane (30) and bearing core (1) between form jointly and be used for holding sealed space (5) of ceramic ball (31), it has liquid metal in order to improve in sealed space (5) to improve the radiating efficiency of bearing reduces simultaneously bearing noise.
2. Bearing for an X-ray tube according to claim 1, characterized in that there is a micro gap between the sealing ring (4) and the bearing core (1), and that the side of the sealing ring (4) close to the bearing core (1) is coated with a special coating to avoid liquid metal in the sealed space (5) from spilling out.
3. Bearing for an X-ray tube according to claim 1, characterized in that the bearing core (1) is provided with a first annular groove (10), a number of the ceramic balls (31) being at least partially accommodated in the first annular groove (10).
4. Bearing for an X-ray tube according to claim 1, characterized in that the outer ring (30) is provided with a second annular groove (300), in that a number of the ceramic balls (31) are at least partly accommodated in the second annular groove (300).
5. The bearing for an X-ray tube according to claim 1, characterized in that the at least one ball bearing (3) comprises two ball bearings (3), two ball bearings (3) being located at a first end (11) and a second end (12) of the bearing core (1), respectively, the bearing for an X-ray tube further comprising a support (6), both ends of the support (6) being in abutment with two ball bearings (3), respectively.
6. The bearing for an X-ray tube according to claim 5, wherein the bearing housing (2) is provided with a mounting groove (20), the bearing core (1) is at least partially accommodated in the mounting groove (20), the first end (11) of the bearing core (1) is arranged close to the bottom wall (200) of the mounting groove (20), and the second end (12) of the bearing core (1) is arranged away from the bottom wall (200) of the mounting groove (20).
7. The bearing for an X-ray tube according to claim 6, further comprising an elastic spacer (7), wherein one side of the elastic spacer (7) abuts against a bottom wall (200) of the mounting groove (20) and the other side abuts against a ball bearing (3) located at the first end (11).
8. The bearing for an X-ray tube according to claim 6, characterized in that the bearing for an X-ray tube further comprises a retainer ring (8), the retainer ring (8) being clamped with the bearing housing (2) and the retainer ring (8) being in abutment with a ball bearing (3) at the second end (12).
9. The bearing for an X-ray tube according to claim 6, characterized in that an inner side wall (201) forming the mounting groove (20) is provided with a receiving groove (202), and the retainer ring (8) is at least partially clamped in the receiving groove (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703640.4A CN117711891A (en) | 2023-12-12 | 2023-12-12 | Bearing for X-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703640.4A CN117711891A (en) | 2023-12-12 | 2023-12-12 | Bearing for X-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117711891A true CN117711891A (en) | 2024-03-15 |
Family
ID=90156284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311703640.4A Pending CN117711891A (en) | 2023-12-12 | 2023-12-12 | Bearing for X-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117711891A (en) |
-
2023
- 2023-12-12 CN CN202311703640.4A patent/CN117711891A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4097759A (en) | X-ray tube | |
| US7746982B2 (en) | Rotary anode X-ray tube | |
| CN1024872C (en) | Rotary anode type X-ray tube | |
| JP4298826B2 (en) | Straddle bearing assembly | |
| EP0149869B1 (en) | X-ray tube comprising a helical-groove bearing | |
| US4097760A (en) | X-ray tube having bearing lubrication | |
| CN117711891A (en) | Bearing for X-ray tube | |
| US6807348B2 (en) | Liquid metal heat pipe structure for x-ray target | |
| US20060256923A1 (en) | Device for generating x-rays | |
| US9275822B2 (en) | Liquid metal containment in an X-ray tube | |
| US20020150212A1 (en) | Multiple row spiral groove bearing for x-ray tube | |
| US20090052627A1 (en) | System and method for collecting backscattered electrons in an x-ray tube | |
| CN213309812U (en) | X-ray CT bulb tube with uniform temperature | |
| JPH02144836A (en) | Rotary anode x-ray tube | |
| CN216975555U (en) | Liquid metal bearing | |
| JP2004353867A (en) | Electrically conducting ceramic bearing | |
| CN111146058A (en) | Magnetic fluid sealed multi-arm cathode X-ray tube | |
| EP0821391B1 (en) | X-ray tube and method of generating x-rays | |
| CN216975533U (en) | Liquid metal bearing with liquid storage function | |
| CN217444332U (en) | X-ray tube anode target disk | |
| RU2754863C1 (en) | X-ray radiation source | |
| CN211016989U (en) | Magnetic fluid sealed multi-arm cathode X-ray tube | |
| CN215680603U (en) | Sliding bearing and X-ray tube assembly | |
| CN211788909U (en) | Long-life X-ray CT tube | |
| CN213716837U (en) | X-ray tube with high cooling efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |