CN208796949U - A kind of high stability CT bulb - Google Patents
A kind of high stability CT bulb Download PDFInfo
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- CN208796949U CN208796949U CN201821615463.9U CN201821615463U CN208796949U CN 208796949 U CN208796949 U CN 208796949U CN 201821615463 U CN201821615463 U CN 201821615463U CN 208796949 U CN208796949 U CN 208796949U
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Abstract
A kind of high stability CT bulb, including anode, cathode and glass shell；Cathode is mounted on the top of glass shell inner cavity；Anode includes rotor, shaft, bearing, anode can be cut down and anode disc, the outer ring of bearing can cut down the bottom for being mounted on glass shell inner cavity by anode, shaft is in the inner ring of bearing and connect with the inner ring of bearing, rotor is fixedly connected with shaft, it is provided with centre bore in the middle part of anode disc, anode disc is fixedly mounted on rotor by centre bore；Anode disc includes the scattering layer made of tungsten-rhenium alloy, heat-conducting layer and the heat dissipating layer made of graphite made of metal molybdenum, and the upper surface of heat-conducting layer is arranged in scattering layer, and the lower surface of heat-conducting layer is arranged in heat dissipating layer.This high stability CT bulb can bear the shock of high-speed electron flow and rapidly distribute heat since anode disc uses the structure combined by scattering layer, heat-conducting layer and heat dissipating layer, improve the job stability of CT bulb, prolong the service life.
Description
Technical field
The utility model relates to a kind of CT bulb more particularly to a kind of high stability CT bulbs.
Background technique
CT machine is a kind of multiple functional condition detection instrument, and with the development of technology, CT machine is with high resolution and directly
See, accurate diagnosis effect and popularized, be widely used in medical field.CT bulb, also referred to as X-ray
Pipe, is the core component in CT machine, and for generating X-ray, the technical perfection of CT bulb whether directly affects the work effect of CT machine
Fruit.X-ray tube mainly includes anode, cathode and glass shell, and anode includes rotor, bearing, fixed hub and anode disc, yin
Pole includes filament, cathode taps and cathode stem.Its working principle is that: the filament made of tungsten wire can emit enough at high temperature
The electronics of quantity, as electron source；The strong electrical field formed between anode, cathode plus the high pressure by tens kilovolts to several hundred kilovolts
Under effect, accelerates electronics and form high-speed electron flow；The effect of anode is to attract electronics and accelerate electronics, and make high-speed motion
Electron bombardment target disc target surface, target surface are subjected to electron bombardment it are made sharply to be obstructed generating X-ray.
The electrode system of entire X-ray tube is encapsulated in the glass shell of high vacuum, and glass shell is to support yin, yang two
Pole simultaneously provides vacuum environment necessary to high-velocity electrons flight and high temperature filament normal work.Since the anode disc of CT bulb needs
To receive high-speed electron flow shock under conditions of high temperature, high speed rotation and vacuum, therefore the target surface of anode disc would generally produce
Raw slight crack, meanwhile, only 1% energy is converted into X-ray and launches after high-speed electron flow bombardment anode disc, remaining 99%
Energy be converted into the energy of thermal energy or other forms, and current anode disc target is typically just made of tungsten-rhenium alloy
One entirety, heat-sinking capability is poor, and generated thermal energy can not shed in time, so that anode disc is difficult to work steadily in the long term
Make, service life is shorter.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of high stability CT bulb, this high stability CT bulb
So that anode disc is born biggish heat when rotating at high speed and is radiated in time, improve the job stability of CT bulb, extension makes
Use the service life.The technical solution adopted is as follows:
A kind of high stability CT bulb, including anode, cathode and glass shell；Cathode is mounted on the top of glass shell inner cavity
Portion；Anode includes rotor, shaft, bearing, anode can be cut down and anode disc, and anode disc is discoid, the anode disc of back-off
Circumferential annular slope is anode target surface, and bearing can cut down the bottom for being mounted on glass shell inner cavity, shaft and bearing by anode
Connection, rotor are fixedly connected with shaft, and centre bore is provided in the middle part of anode disc, and anode disc is fixedly mounted on by centre bore to be turned
On son；Be characterized in: the anode disc includes the scattering layer made of tungsten-rhenium alloy, the heat-conducting layer made of metal molybdenum and by stone
The upper surface of heat-conducting layer is arranged in heat dissipating layer made of ink, scattering layer, and the lower surface of heat-conducting layer is arranged in heat dissipating layer.
As a preferred embodiment of the present invention, the inclination angle of the anode target surface is 10 °~15 °.The inclination angle of anode target surface
For the angle between the striking face (i.e. the target surface of anode disc) and the vertical plane of X-ray tube shaft of high-speed electron flow, theoretically
The inclination angle of the anode target surface of anode disc is bigger, then high-speed electron flow impinges upon actual focal spot area on anode target surface and effectively
Focus area is bigger, so that the clarity of image obtained by making reduces, therefore the anode target face angle degree of anode disc is selected as 10 °
~15 °.In a kind of concrete scheme, the inclination angle of the further preferred anode target surface is 12 °.
As a preferred embodiment of the present invention, the bearing is integrated bearing, and shaft, which is contracted, includes bearing insert, liner
The lower part of set, the first ball bearing and the second ball bearing, the rotor is equipped with inner cavity；Bearing insert can be cut down by the anode
It is mounted on the bottom of the glass shell；First ball bearing, neck bush, the second ball bearing are successively set on axis from top to bottom
It holds in bushing, the both ends of neck bush are connect with the inner ring of the first ball bearing, the second ball bearing respectively, the first ball bearing,
The outer ring of second ball bearing is connect with the inner wall of bearing insert respectively；The shaft sequentially passes through the first ball axis from top to bottom
It holds, neck bush, the second ball bearing, shaft is connect with the inner ring of the first ball bearing, the second ball bearing, and the upper end of shaft connects
Socket part is exposed outside the first ball bearing；Bearing insert is extend into the inner cavity of rotor, the shoulder axis of rotor and the upper end of shaft
Interconnecting piece is fixedly connected.
As a preferred embodiment of the present invention, the cathode includes pallet, cathode taps, cathode base, cathode loop, cathode
Cylinder, cathode can be cut down and with lead filament；Cathode taps are mounted on the side of pallet, and cathode base is mounted in cathode taps, band lead lamp
Silk is mounted on cathode base, and cathode loop is socketed in outside cathode taps；Cathode tube is mounted on pallet and connect with cathode taps, cathode
The lower end that can be cut down is fixedly mounted on cathode tube, and the upper end that cathode can be cut down is connect with glass shell.
As the further preferred embodiment of the utility model, the cathode can be cut down including cathode fixing end and cathode sealing-in
Part, cathode closure are fixedly mounted in cathode tube, the lower end of cathode fixing end extend into cathode tube and with cathode closure
Connection, the upper end of cathode fixing end is connect with the glass shell.
As the further preferred embodiment of the utility model, the band lead filament include first lead, the second lead and
The first end of filament, filament is connect with first lead, and the second end of filament is connect with the second lead；Filament is made by rhenium tungsten wire system
It forms；First lead, the second lead include the cathode section made of molybdenum, the welding section made of teleoseal and are twisted by copper
It is thread it is outer draw section, cathode section, welding section draw section outside and are sequentially connected, the respective end connection of cathode section and filament, welding section with
The glass shell welding, draws section outside and is in outside glass shell.
The utility model compared with prior art, has the advantages that
This high stability CT bulb, since anode disc uses the structure combined by scattering layer, heat-conducting layer and heat dissipating layer,
It can bear the shock of high-speed electron flow and rapidly distribute heat, improve the job stability of CT bulb, extend and use the longevity
Life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the preferred embodiments of the present invention；
Fig. 2 is the structural schematic diagram of anode；
Fig. 3 is the structural schematic diagram of cathode；
Fig. 4 is sectional view of the Fig. 3 along A-A；
Fig. 5 is the structural schematic diagram with lead filament；
Fig. 6 is the structural schematic diagram of first lead, the second lead.
Specific embodiment
It is described further with reference to the accompanying drawing with preferred embodiments of the present invention.
As shown in Figure 1, this high stability CT bulb, including anode 1, cathode 2 and glass shell 3；Cathode 2 is mounted on glass
The top of 3 inner cavity of glass shell；As shown in Fig. 2, anode 1 can cut down 104 and sun including rotor 101, shaft 102, bearing 103, anode
Pole target disc 105, anode disc 105 are the discoid of back-off, and the circumferential annular slope of anode disc 105 is anode target surface 1051,
The inclination angle of anode target surface 1051 is 12 ° (10 °~15 ° are ok), and bearing 103 can cut down 104 by anode and be mounted on glass shell 3
The bottom of inner cavity, shaft 102 are connect with bearing 103, and rotor 101 is fixedly connected with shaft 102, are provided in the middle part of anode disc 105
Centre bore 1052, anode disc 105 are fixedly mounted on rotor 102 by centre bore 1052；Anode disc 105 includes by rhenium tungsten
Scattering layer 1053, heat-conducting layer 1054 and heat dissipating layer 1055 made of graphite made of metal molybdenum made of alloy, scattering layer
1053 are arranged in the upper surface of heat-conducting layer 1054, and the lower surface of heat-conducting layer 1054 is arranged in heat dissipating layer 1055.
As shown in Fig. 2, above-mentioned bearing 103 is integrated bearing, shaft contract include bearing insert 1031, neck bush 1032,
The lower part of first ball bearing 1033 and the second ball bearing 1034, rotor 101 is equipped with inner cavity 1011；Bearing insert 1031 passes through
Anode can cut down 104 bottoms for being mounted on glass shell 3；First ball bearing 1033, neck bush 1032, the second ball bearing 1034
Be successively set in bearing insert 1031 from top to bottom, the both ends of neck bush 1032 respectively with the first ball bearing 1033, second
The inner ring of ball bearing 1034 connects, the first ball bearing 1033, the second ball bearing 1034 outer ring respectively with bearing insert
1031 inner wall connection；Shaft 102 sequentially passes through the first ball bearing 1033, neck bush 1032, the second ball axis from top to bottom
1034 are held, shaft 102 is connect with the inner ring of the first ball bearing 1033, the second ball bearing 1034, the upper end connection of shaft 102
Portion's dew 1021 goes out in 1033 outside of the first ball bearing；Bearing insert 1031 is extend into the inner cavity 1011 of rotor 101, rotor
101 shoulder axis 1012 is fixedly connected with the upper end interconnecting piece 1021 of shaft 102.
As shown in Figure 3, Figure 4, above-mentioned cathode 2 includes pallet 201, cathode taps 202, cathode base 203, cathode loop 204, cathode
Cylinder 205, cathode can cut down 206 and be hidden in cathode base 203 with lead filament 207(, see Fig. 5)；Cathode taps 202 are mounted on pallet
201 side, cathode base 203 are mounted in cathode taps 202, and band lead filament 207 is mounted on cathode base 203, cathode loop 204
It is socketed in 202 outside of cathode taps；Cathode tube 205 is mounted on pallet 201 and connect with cathode taps 202, and cathode can be cut down under 206
End is fixedly mounted on cathode tube 205, and the upper end that cathode can cut down 206 is connect with glass shell 3.Wherein, cathode can cut down 206 and include
Cathode fixing end 2061 and cathode closure 2062, cathode closure 2062 are fixedly mounted in cathode tube 205, cathode fixing end
2061 lower end extend into cathode tube 205 and connect with cathode closure 2062, the upper end of cathode fixing end 2061 and glass
Shell 3 connects.
As shown in Figure 5, Figure 6, above-mentioned band lead filament 207 includes first lead 2071, the second lead 2072 and filament
2073, the first end of filament 2073 is connect with first lead 2071, and the second end of filament 2073 is connect with the second lead 2072, lamp
2073 diameters of silk are 0.22 millimeter, and filament 2073 is helical heater, and the axle diameter of helical heater 2073 is 1.20 millimeters；
Filament 2073 is made by rhenium tungsten wire system；First lead 2071, the second lead 2072 include the cathode section made of molybdenum
20711, the welding section 20712 made of teleoseal and outer made of copper stranded conductor draw section 20713, cathode section 20711, weldering
Connect section 20712, draw section 20713 outside and be sequentially connected, cathode section 20711 is connect with the respective end of filament 2073, welding section 20712 with
Glass shell 3 connects (welding), draws section 20713 outside and is in 3 outside of glass shell.
Above-mentioned anode, which can cut down 104, cathode, can cut down 206 generally circular in cross section sealed connecting components, generally use teleoseal
It is made, other metal materials can also be used.
By setting anode disc 105 to by scattering layer 1053, heat-conducting layer 1054 and the combined structure of heat dissipating layer 1055,
Wherein scattering layer 1053 is made of tungsten-rhenium alloy, and tungsten-rhenium alloy hardness is high, and stability with higher and strong at high temperature
Degree, therefore scattering layer 1053 can repeatedly bear the shock of high-speed electron flow under conditions of high temperature, high vacuum and high speed rotation；It leads
Thermosphere 1054 is made of metal molybdenum, and metal molybdenum is high with fusing point, hardness is high, the coefficient of expansion is small, thermal conductivity is good, while at high temperature
With good plasticity, heat-conducting layer 1054 using metal molybdenum as anode disc 105 can effectively absorb scattering layer 1053
Heat be transmitted on heat dissipating layer 1055, while being not susceptible to deform；Heat dissipating layer 1055 is made of graphite, and graphite high temperature resistant is led
It is hot good, quickly the heat of anode disc 105 can be distributed, while cooling will not be generated and be split after use under high temperature environment
Line.
It is to empty the lower part of rotor 101, then by integrated bearing in addition, by the way that inner cavity 1011 is arranged on rotor 101
103 extend into the inner cavity 1011 of rotor 101, to considerably reduce the height of anode disc 105, almost only rotor
101 height, so that the center of gravity sharp fall of anode disc 105, improves its high-speed rotating stability；Another party
Fixed hub in the prior art and bearing are replaced with integrated bearing 103, pass through the first ball bearing 1033, neck bush by face
1032, the connection of the second ball bearing 1034 and shaft 102, limits shaft 102, increased considerably shaft 102 by
The length of limitation avoids trembling of the shaft 102 in high speed rotation, so that anode disc 105 has higher revolving speed
And stationarity, improve image quality.
In addition, being set as cathode fixing end 2061 and cathode closure 2062 by the way that cathode can be cut down 206, wherein cathode is sealed
Fitting 2062 is placed directly onto the middle and lower part in cathode tube 205, realize it is preferable be tightly connected, and be used for and glass shell 3 welds
The cathode fixing end 2061 connect can be then made wide greatly, and the connection area of 206 Yu glass shell 3 can be cut down by increasing cathode, be mentioned
High structural stability；And since cathode can cut down 206 inside for extending into cathode tube 205, so that after connection in the center of gravity of cathode 2
It moves, the junction of 206 Yu glass shell 3 can be cut down by being more nearly cathode, so that the torque of 2 center of gravity of cathode becomes smaller, avoid torque mistake
Cause cathode that can cut down 206 and crack with 3 junction of glass shell greatly even to rupture, to further increase structural stability
And prolong the service life.
In addition, using filament 2073 made of rhenium tungsten wire as cathode, rhenium tungsten wire is the alloy material made of rhenium and tungsten,
Sufficient amount of electronics can be emitted under high temperature, as electron source；Rhenium tungsten wire resistivity with higher, surface oxidation-resistant is good,
Plasticity is higher at low temperature, and easily fabricated, moulding has good processing performance and solderability, and at high temperature have compared with
High stability and intensity, cools down again after long-time service, and material will not become fragile.By first lead 2071, the second lead 2072
It is divided into cathode section 20711, welding section 20712 and draws section 20713 outside, cathode section 20711 is made of molybdenum, has cathode section 20711
There is feature resistant to high temperature, makes that it is suitable for connecting with the respective end of filament 2073；Welding section 20712 is made of teleoseal,
Make welding section 20712 that there is the general intensity of glass and hardness, is connect with glass shell 3 after (welding), it is not easy to by external force
Effect rotates distortion, to avoid damage to original seal interface, avoids generating X-ray tube air leakage failure；Welding section
20712 material expansions are close with glass expansion coefficient, connect after (welding) with glass shell 3, can avoid glass shell 3
Because of frit or fragmentation caused by temperature change, to achieve the purpose that improve vacuum degree；Draw section 20713 by copper stranded conductor system outside
At, make it is outer draw section 20713 and have good conductive property, connect filament supply outside glass shell 3；To make filament
Adaptability further increases lead portion in a high temperauture environment.
In addition, it should be noted that, the specific embodiments described in this specification, each section title etc. can not
Together, all equivalent or simple changes done according to structure, feature and principle described in the concept of the patent of the utility model are included in this
In the protection scope of utility model patent.Those skilled in the art of the present invention can be to described specific reality
Example is applied to do various modifications or additions or be substituted in a similar manner, structure without departing from the utility model or
Beyond the scope defined by this claim, it all should belong to the protection range of the utility model.
Claims (6)
1. a kind of high stability CT bulb, including anode, cathode and glass shell；Cathode is mounted on the top of glass shell inner cavity
Portion；Anode includes rotor, shaft, bearing, anode can be cut down and anode disc, and anode disc is discoid, the anode disc of back-off
Circumferential annular slope is anode target surface, and bearing can cut down the bottom for being mounted on glass shell inner cavity, shaft and bearing by anode
Connection, rotor are fixedly connected with shaft, and centre bore is provided in the middle part of anode disc, and anode disc is fixedly mounted on by centre bore to be turned
On son；It is characterized in that: the anode disc include the scattering layer made of tungsten-rhenium alloy, the heat-conducting layer made of metal molybdenum and by
The upper surface of heat-conducting layer is arranged in heat dissipating layer made of graphite, scattering layer, and the lower surface of heat-conducting layer is arranged in heat dissipating layer.
2. high stability CT bulb as described in claim 1, it is characterized in that: the inclination angle of the anode target surface is 10 °~15 °.
3. high stability CT bulb as described in claim 1, it is characterized in that: the bearing is integrated bearing, shaft is contracted
Bearing insert, neck bush, the first ball bearing and the second ball bearing are included, the lower part of the rotor is equipped with inner cavity；Bearing insert
The bottom for being mounted on the glass shell can be cut down by the anode；First ball bearing, neck bush, the second ball bearing are from upper
It is successively set in bearing insert under, the both ends of neck bush connect with the inner ring of the first ball bearing, the second ball bearing respectively
Connect, the first ball bearing, the second ball bearing outer ring connect respectively with the inner wall of bearing insert；The shaft from top to bottom according to
It is secondary to pass through the first ball bearing, neck bush, the second ball bearing, the inner ring of shaft and the first ball bearing, the second ball bearing
The upper end interconnecting piece of connection, shaft exposes outside the first ball bearing；Bearing insert is extend into the inner cavity of rotor, rotor
Shoulder axis is fixedly connected with the upper end interconnecting piece of shaft.
4. high stability CT bulb as described in claim 1, it is characterized in that: the cathode includes pallet, cathode taps, cathode
Core, cathode loop, cathode tube, cathode can cut down and with lead filaments；Cathode taps are mounted on the side of pallet, and cathode base is mounted on cathode
On head, band lead filament is mounted on cathode base, and cathode loop is socketed in outside cathode taps；Cathode tube be mounted on pallet and with yin
Cartridge connection, the lower end that cathode can be cut down are fixedly mounted on cathode tube, and the upper end that cathode can be cut down is connect with glass shell.
5. high stability CT bulb as claimed in claim 4, it is characterized in that: the cathode can be cut down including cathode fixing end and yin
Pole closure, cathode closure are fixedly mounted in cathode tube, and the lower end of cathode fixing end is extend into cathode tube and and cathode
Closure connection, the upper end of cathode fixing end is connect with the glass shell.
6. high stability CT bulb as claimed in claim 4, it is characterized in that: the band lead filament includes first lead,
The first end of two leads and filament, filament is connect with first lead, and the second end of filament is connect with the second lead；Filament is by rhenium tungsten
Silk is made；First lead, the second lead include the cathode section made of molybdenum, the welding section made of teleoseal
Drawing section with outer made of copper stranded conductor, cathode section, welding section draw section outside and are sequentially connected, the respective end connection of cathode section and filament,
Welding section and the glass shell weld, and draw section outside and are in outside glass shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821615463.9U CN208796949U (en) | 2018-09-30 | 2018-09-30 | A kind of high stability CT bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821615463.9U CN208796949U (en) | 2018-09-30 | 2018-09-30 | A kind of high stability CT bulb |
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| Publication Number | Publication Date |
|---|---|
| CN208796949U true CN208796949U (en) | 2019-04-26 |
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ID=66211438
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821615463.9U Active CN208796949U (en) | 2018-09-30 | 2018-09-30 | A kind of high stability CT bulb |
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| Country | Link |
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| CN (1) | CN208796949U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243948A (en) * | 2018-09-30 | 2019-01-18 | 汕头高新区聚德医疗科技有限公司 | A kind of high stability CT bulb |
| CN109767965A (en) * | 2018-12-29 | 2019-05-17 | 中国电子科技集团公司第十二研究所 | A kind of X-ray tube electrode assembly and preparation method thereof |
| CN117174557A (en) * | 2023-11-03 | 2023-12-05 | 上海超群检测科技股份有限公司 | High-energy micro-focus X-ray tube |
-
2018
- 2018-09-30 CN CN201821615463.9U patent/CN208796949U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243948A (en) * | 2018-09-30 | 2019-01-18 | 汕头高新区聚德医疗科技有限公司 | A kind of high stability CT bulb |
| CN109767965A (en) * | 2018-12-29 | 2019-05-17 | 中国电子科技集团公司第十二研究所 | A kind of X-ray tube electrode assembly and preparation method thereof |
| CN117174557A (en) * | 2023-11-03 | 2023-12-05 | 上海超群检测科技股份有限公司 | High-energy micro-focus X-ray tube |
| CN117174557B (en) * | 2023-11-03 | 2024-01-09 | 上海超群检测科技股份有限公司 | High-energy micro-focus X-ray tube |
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