CN104916514B - X-ray emitter - Google Patents
X-ray emitter Download PDFInfo
- Publication number
- CN104916514B CN104916514B CN201510111700.2A CN201510111700A CN104916514B CN 104916514 B CN104916514 B CN 104916514B CN 201510111700 A CN201510111700 A CN 201510111700A CN 104916514 B CN104916514 B CN 104916514B
- Authority
- CN
- China
- Prior art keywords
- ray emitter
- ray
- rotor
- electric drive
- gas tube
- 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.)
- Active
Links
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000011224 oxide ceramic Substances 0.000 claims description 4
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910017083 AlN Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- -1 silicon nitrides Chemical class 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052575 non-oxide ceramic Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004846 x-ray emission Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
Landscapes
- X-Ray Techniques (AREA)
Abstract
The present invention relates to an X-ray emitter having an emitter housing. An X-ray tube is arranged in the emitter housing. The X-ray tube includes a vacuum housing, wherein, a rotating anode in the vacuum housing is held on a rotor shaft in a rotationally fixed manner to a rotor shaft. The rotor shaft is connected to a rotor of an electric drive motor in a force-transmitting manner, wherein, the motor of the electric drive motor is arranged inside the vacuum housing, and a stator of the electric drive motor is arranged outside the vacuum housing and inside the emitter housing. A can is arranged between the rotor and stator, and the can forms one part of the vacuum housing. According to the invention, the can is made of a ceramic material. This type of X-ray emitter has an electric driver with high efficiency.
Description
Technical field
The present invention relates to a kind of X-ray emitter.
Background technology
In known X-ray emitter, the X-ray tube with vaccum case is arranged in emitter housing.In vacuum
In housing, rotating anode is torsionally maintained on armature spindle, wherein, armature spindle is connected with the rotor forces of electric drive motor with transmitting.
The rotor of electric drive motor is arranged on inside vaccum case, and relatively the stator of electric drive motor is arranged on the outside of vaccum case
And it is arranged on the inside of emitter housing.Gas tube (also known as " clearance type pipe ") is set between rotor and stator, its composition
A part for vaccum case.The X-ray emitter of this form is also referred to as rotating anode-X-ray emitter.
Electric drive motor is designed as mostly asynchronous machine or can also be reluctance motor.
Spacing between the stator of the rotor and electric drive motor of electric drive motor is referred to as the air gap and from drive
Should be designed to for dynamic technology it is little as far as possible, for making minimization of loss.
In rotating anode-X-ray emitter, the air gap as little as possible is limited as design constructs reason, because
It is the presence of required gas tube between the stator of the rotor and electric drive motor of electric drive motor, which constitutes vaccum case, and (X is penetrated
Spool overcoat, vacuum jacket) a part.
Gas tube undertakes other following functions in rotating anode-X-ray emitter：
- gas tube constitutes the part of power transmission, and rotary system is connected by which with cathode assembly.
- gas tube also constitutes the part with vacuum and must be vacuum-packed in all of running status.
- gas tube affect magnetic transmission characteristic and therefore substantially determine electric drive motor efficiency.
The part of-gas tube composition high pressure isolation in addition.
Between rotor and stator in the case of potential difference, such as which is such case in bipolar X-ray tubes, rotor and
Bigger spacing is needed between stator even, for the high pressure of insulating effect and avoiding puncturing well enough.
Due to larger the air gap, electric drive motor usually has poor efficiency in rotating anode-X-ray tube.
Difference-revolutional slip between driving frequency and rotor frequency-correspondingly larger.As the increase of revolutional slip is in electric drive horse
Loss in the rotor for reaching can also increase.
In addition, in some solutions, the cooling of gas tube is also difficult and may cause, and the air gap still must
Increase must be continued.As a result of which the solution pursued can not or be only capable of expending to realize with out-of-proportion technology.
Or the vaccum case of rotating anode-X-ray tube is by glass system in known rotating anode-X-ray emitter
Or into being made up of metal.
In the vaccum case by made by glass (glass tubing), the magnetic field of stator can nondestructively pass through gas tube.But this
Do not have enough mechanical stabilities when vaccum case is planted for as high power x-ray tube application, therefore this vacuum tube can not
For the Computerized chromatographic scanning imagery equipment with the X-ray emitter of rotation at a high speed.
Therefore new development in high power X-ray emitter generally has the vaccum case that metal is constituted.Due to metal
Electric conductivity undesirable vortex can be induced between the rotating excitation field of stator and rotor, on the one hand which reduce electric drive horse
The heat of the efficiency for reaching and the gas tube on the other hand causing metal.Reduce loss or kept little probability as far as possible
Can be realized by the wall thickness of reduction gas tube.However, required mechanical stability and required vacuum leakproofness here
Limit the wall thickness of gas tube.
In metal X-ray tube, the sufficiently low therefore poorly efficient electric drive motor of anode rotary speed so far is only less
People is allowed to notice.Due to for the requirement of higher focal spot load, it is clear that the anode rotating speed of higher at least 200Hz is needs
, for higher energy density is obtained in rotating anode.
The content of the invention
The technical problem to be solved is, there is provided a kind of X-ray emission with higher efficiency electric drive
Device.
The technical problem is solved by a kind of X-ray emitter, and which has emitter housing, in the housing arranges X
Ray tube, the X-ray tube include vaccum case, wherein, in vaccum case, rotating anode is torsionally maintained on armature spindle,
The armature spindle is connected with the rotor forces of electric drive motor with transmitting, and the rotor of electric drive motor is arranged on vaccum case
The internal and stator of electric drive motor is then arranged on the outside of vaccum case and the inside of emitter housing, and in rotor and fixed
Gas tube is set between son, and the gas tube constitutes a part for vaccum case, it is proposed, according to the invention, the gas tube is by ceramic material
Constitute.
It is not ferromagnetic and is high-resistance or electric insulation for the ceramic material of gas tube setting according to the present invention.
Therefore in electric drive motor expeditiously can strongly reduce between rotor and stator or prevent completely by gas tube
The generation of eddy current, the eddy current produce in gas tube and lose and suppress main driving magnetic field.In addition it is basic
On reached stability as metal gap pipe, therefore enough vacuum reliabilities can be produced and successfully can be used
In with the computer tomography equipment of the X-ray emitter of rotation at a high speed.
Therefore in the present invention can comprehensive metal X-ray tube advantage (high mechanical stability) and glass rays pipe it is excellent
Point (avoids eddy current).
According to solution of the invention except reducing or avoiding additionally providing one in addition to generation eddy current in gas tube it is
Row further advantage.
Therefore the efficiency of electric drive motor is considerably higher.Under identical driving power, therefore higher sun can be realized
Pole rotating speed or higher moment of torsion.Alternately for the anode rotating speed for determining can be using with more low power electric drive horse
Reach；Therefore the size of electromotor can be correspondingly less.
Because the design of rotor is affected by its magnetic feedback, therefore can be in electric drive power not by efficiency raising
The quality of ferrum or copper is reduced during change, this plays positive role in the design bearing supporting force for electric drive motor.
Because eddy current is induced in gas tube with will not or may be significantly smaller in the X-ray tube according to the present invention,
The heat of gas tube then can be substantially reduced, therefore the chiller of gas tube can be fully phased out if necessary.
In the solution according to the present invention, it is ensured that the good radiating of rotor.As gap tube material compares gold
Metal surface has a very high emissivity, and the rotor of electric drive motor can be rich in and efficient radiate.
According to a favourable structure design of the X-ray emitter of the present invention, gas tube passes through at least one connecting element
It is fixed on vaccum case.
According to a kind of preferred modification of X-ray emitter, connecting element here comprising at least one balance alloy and
The fixation is carried out by soldering connection.This balance alloy is, for example, molten alloy, and which is based on, and FeNiCo makes and which is swollen
Swollen coefficient is preferably suited for ceramic material.Therefore the gas tube being made up of ceramic material can be by common welding procedure machine
It is connected on the tube shell of metal to the power transmission of tool.
According to a kind of particularly preferred structure design of X-ray emitter, ceramic material is oxide ceramics.Penetrate according to X
Line emitter another kind of also, it is preferred that form of implementation, ceramic material is non-oxide ceramicses.
The oxide ceramic material of gas tube advantageously aluminium oxide.Aluminium oxide (Al2O3) with extraordinary electric insulation
Property, which has very high mechanical strength and very high hardness and very high wearability.
It is zirconium dioxide that another kind is preferred for the oxide ceramic material of gas tube.Zirconium dioxide (ZrO2) with very high
Thermal coefficient of expansion and good heat insulation shape and with very high anticracking toughness.
Non-oxide ceramic material for gas tube is preferably silicon nitride.Silicon nitride (Si3N4) hand over extraordinary heat
In changing stability and very high fracture toughness and can be used for up to about 1600 DEG C of neutral environment.
According to another kind of preferred form of implementation, aluminium nitride is provided as non-oxide ceramicses.The feature of aluminium nitride (AlN)
It is very high heat conductivity and extraordinary electrical insulating property.
In addition to the pure ceramic material, the preferred extension design of X-ray emitter can also be realized, wherein constituting
The ceramic material of gas tube is composite, and which includes at least one ceramic raw material.The feature of particularly preferred form of implementation
It is that composite is metal-ceramic-composite.Technical term quilt of this metal-ceramic-composite according to English
Referred to as " Metal-Matirx-Composite ", is abbreviated as MMC.
Claims (11)
1. a kind of X-ray emitter, which has emitter housing, and X-ray tube, the X-ray are arranged in the emitter housing
Pipe includes vaccum case, wherein, in the vaccum case, rotating anode is torsionally maintained on armature spindle, the armature spindle with it is electric
The rotor forces transmission ground of drive motor is connected, and the rotor of electric drive motor is arranged on inside and the electric drive of vaccum case
The stator of motor is arranged on the inside of the outside of vaccum case and emitter housing, and arranges gap between rotor and stator
Pipe, the gas tube constitute a part for vaccum case, it is characterised in that gas tube is made up of ceramic material.
2. according to the X-ray emitter described in claim 1, it is characterised in that gas tube is solid by least one connecting element
It is scheduled on vaccum case.
3. according to the X-ray emitter described in claim 2, it is characterised in that connecting element includes at least one balance alloy
And the fixation is carried out by soldering connection.
4. according to the X-ray emitter described in claim 1, it is characterised in that ceramic material is oxide ceramics.
5. according to the X-ray emitter described in claim 1, it is characterised in that ceramic material is non-oxide ceramicses.
6. according to the X-ray emitter described in claim 4, it is characterised in that oxide ceramics is aluminium oxide.
7. according to the X-ray emitter described in claim 4, it is characterised in that oxide ceramics is zirconium dioxide.
8. according to the X-ray emitter described in claim 5, it is characterised in that non-oxide ceramicses are silicon nitrides.
9. according to the X-ray emitter described in claim 5, it is characterised in that non-oxide ceramicses are aluminium nitride.
10. according to the X-ray emitter described in claim 1, it is characterised in that ceramic material is composite, its include to
A kind of few ceramic raw material.
11. according to the X-ray emitter described in claim 10, it is characterised in that the composite is metal-ceramic-multiple
Condensation material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014204771.4 | 2014-03-14 | ||
| DE102014204771.4A DE102014204771B4 (en) | 2014-03-14 | 2014-03-14 | X-ray |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104916514A CN104916514A (en) | 2015-09-16 |
| CN104916514B true CN104916514B (en) | 2017-04-12 |
Family
ID=54010204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510111700.2A Active CN104916514B (en) | 2014-03-14 | 2015-03-13 | X-ray emitter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104916514B (en) |
| DE (1) | DE102014204771B4 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0218434A2 (en) * | 1985-09-30 | 1987-04-15 | Kabushiki Kaisha Toshiba | X-ray tube |
| DE4034532A1 (en) * | 1990-10-30 | 1992-05-07 | Siemens Ag | Rotating anode X=ray tube - uses field emission source attached to rotor cooperating with stator coupled to anode terminal |
| JP2006100032A (en) * | 2004-09-28 | 2006-04-13 | Toshiba Corp | Rotating anode x-ray tube |
| CN1953638A (en) * | 2005-10-20 | 2007-04-25 | 安捷伦科技有限公司 | Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor |
| CN102449335A (en) * | 2009-05-29 | 2012-05-09 | 西门子公司 | Bearing arrangement for a touch-free magnetic axial bearing and x-ray tubes with said bearing |
| CN203733756U (en) * | 2014-02-13 | 2014-07-23 | 冷锋 | X-ray generator |
| CN104347334A (en) * | 2013-08-08 | 2015-02-11 | 西门子公司 | Single-pole x-ray emitter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0780876A3 (en) * | 1995-12-23 | 1997-12-10 | Philips Patentverwaltung GmbH | Drive device for a rotating anode of an x-ray tube |
| DE102013207806A1 (en) * | 2013-04-29 | 2014-10-30 | Siemens Aktiengesellschaft | Electric machine |
-
2014
- 2014-03-14 DE DE102014204771.4A patent/DE102014204771B4/en active Active
-
2015
- 2015-03-13 CN CN201510111700.2A patent/CN104916514B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0218434A2 (en) * | 1985-09-30 | 1987-04-15 | Kabushiki Kaisha Toshiba | X-ray tube |
| DE4034532A1 (en) * | 1990-10-30 | 1992-05-07 | Siemens Ag | Rotating anode X=ray tube - uses field emission source attached to rotor cooperating with stator coupled to anode terminal |
| JP2006100032A (en) * | 2004-09-28 | 2006-04-13 | Toshiba Corp | Rotating anode x-ray tube |
| CN1953638A (en) * | 2005-10-20 | 2007-04-25 | 安捷伦科技有限公司 | Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor |
| CN102449335A (en) * | 2009-05-29 | 2012-05-09 | 西门子公司 | Bearing arrangement for a touch-free magnetic axial bearing and x-ray tubes with said bearing |
| CN104347334A (en) * | 2013-08-08 | 2015-02-11 | 西门子公司 | Single-pole x-ray emitter |
| CN203733756U (en) * | 2014-02-13 | 2014-07-23 | 冷锋 | X-ray generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104916514A (en) | 2015-09-16 |
| DE102014204771B4 (en) | 2017-04-13 |
| DE102014204771A1 (en) | 2015-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220127 Address after: Erlangen Patentee after: Siemens Healthineers AG Address before: Munich, Germany Patentee before: SIEMENS AG |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240903 Address after: German Phu F Haim Patentee after: Siemens Medical AG Country or region after: Germany Address before: Erlangen Patentee before: Siemens Healthineers AG Country or region before: Germany |
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| TR01 | Transfer of patent right |