CN103887129B - Negative electrode filament and negative electrode lamp - Google Patents
Negative electrode filament and negative electrode lamp Download PDFInfo
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- CN103887129B CN103887129B CN201410136283.2A CN201410136283A CN103887129B CN 103887129 B CN103887129 B CN 103887129B CN 201410136283 A CN201410136283 A CN 201410136283A CN 103887129 B CN103887129 B CN 103887129B
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Abstract
The invention discloses a kind of negative electrode filament, this negative electrode filament comprises molybdenum filament and tungsten-rhenium wire, described tungsten-rhenium wire continuous winding is in the periphery of described molybdenum filament, wherein, the described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the first winding circle and second and is wound around circle, described first is wound around circle for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle for 1-4 circle, spacing between adjacent two circles is 1-4mm, and it is 0.5-2mm that described first winding circle and described second is wound around the spacing between enclosing.A kind of negative electrode lamp that the present invention also provides, it has winding stability and thermal uniformity preferably.
Description
Technical field
The present invention relates to microwave electrovacuum field, particularly, relate to a kind of negative electrode filament of travelling wave tube, and comprise the negative electrode lamp of negative electrode filament.
Background technology
Traditional barium-tungsten dispense cathode belongs to hot cathode, and need the heat that filament provides necessary during work, thermally equivalent is extremely important for cathode emission stability.Before filament is shaping, needs tungsten-rhenium wire to be wound on molybdenum filament, form a constant pitch and the number of turns.The filament of traditional wound easily occurs that tungsten-rhenium wire is in the not good problem of molybdenum filament top offset, loosening stability, and then cause easily occurring the problem such as pitch is uneven, the thermal uniformity of filament assembly is poor, affect cathode emission, filament assembly break-make number of times is fewer simultaneously, affects cathode life.
Therefore, the negative electrode filament needing a kind of stability high.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, the good negative electrode filament of a kind of stability and negative electrode lamp are provided.
The present inventor finds through deep research, by using tungsten-rhenium wire and molybdenum filament, and makes described tungsten-rhenium wire be undertaken being wound around by following structure on described molybdenum filament and can obtain stable filament, thus completes the present invention.Also namely this structure is: the described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the first winding circle and second and be wound around circle, described first is wound around circle for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle for 1-4 circle, spacing between adjacent two circles is 1-4mm, and it is 0.5-2mm that described first winding circle and described second is wound around the spacing between enclosing.
To achieve these goals, the invention provides a kind of negative electrode filament, wherein, this negative electrode filament comprises molybdenum filament and tungsten-rhenium wire, described tungsten-rhenium wire continuous winding is in the periphery of described molybdenum filament, wherein, the described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the first winding circle and second and is wound around circle, described first is wound around circle for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle for 1-4 circle, and the spacing between adjacent two circles is 1-4mm, and it is 0.5-2mm that described first winding circle and described second is wound around the spacing between enclosing.
Preferably, described first is wound around circle for 48-53 circle, and the spacing between adjacent two circles is 0.23-0.27mm, and described second is wound around circle for 1-3 circle, spacing between adjacent two circles is 1-3mm, and it is 0.5-1mm that described first winding circle and described second is wound around the spacing between enclosing.
More preferably, described first is wound around circle for 49-51 circle, and the spacing between adjacent two circles is 0.25-0.26mm, and described second is wound around circle for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and it is 0.6-0.8mm that described first winding circle and described second is wound around the spacing between enclosing.
Preferably, the diameter of described molybdenum filament is 0.2-1mm, is preferably 0.6-0.8mm.
Preferably, the diameter of described tungsten-rhenium wire is 0.1-0.2mm, is preferably 0.13-0.17mm.
Preferably, the diameter of described filament is the diameter that the diameter of described molybdenum filament adds the described tungsten-rhenium wire of a circle be wrapped on described molybdenum filament, and namely molybdenum filament diameter adds the diameter of 2 tungsten-rhenium wires, is preferably 0.4-1.4mm.
Present invention also offers a kind of preparation method of negative electrode filament, the method comprises the operation of tungsten-rhenium wire continuous winding on the periphery of molybdenum filament, wherein, the described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the first winding circle and second and is wound around circle, described first is wound around circle for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle for 1-4 circle, spacing between adjacent two circles is 1-4mm, and it is 0.5-2mm that described first winding circle and described second is wound around the spacing between enclosing.
Preferably, described first is wound around circle for 48-53 circle, and the spacing between adjacent two circles is 0.23-0.27mm, and described second is wound around circle for 1-3 circle, spacing between adjacent two circles is 1-3mm, and it is 0.5-1mm that described first winding circle and described second is wound around the spacing between enclosing.
More preferably, described first is wound around circle for 49-51 circle, and the spacing between adjacent two circles is 0.25-0.26mm, and described second is wound around circle for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and it is 0.6-0.8mm that described first winding circle and described second is wound around the spacing between enclosing.
Preferably, the diameter of described molybdenum filament is 0.2-1mm, and the diameter of described tungsten-rhenium wire is 0.1-0.2mm.
Present invention also offers a kind of negative electrode lamp, this negative electrode lamp comprises negative electrode filament described above.
According to the present invention, the described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the first winding circle, described first is wound around circle for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, by such structure, described negative electrode filament is had and be better wound around stability, tungsten-rhenium wire loosens on molybdenum filament to prevent filament from occurring, and uniform winding makes thermal uniformity better; The described tungsten-rhenium wire of continuous winding on described molybdenum filament periphery comprises the second winding circle, described second is wound around circle for 1-4 circle, spacing between adjacent two circles is 1-4mm, described negative electrode filament is made to use the mode at density interval to be wound around by such structure, further raising is wound around stability, and tungsten-rhenium wire produces displacement on molybdenum filament to prevent filament from occurring.
Therefore, a kind of negative electrode filament provided by the invention, have heat evenly better, the winding stability of filament is high, the feature that filament break-make number of times is less.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of negative electrode filament provided by the invention.
Description of reference numerals
1 tungsten-rhenium wire
2 molybdenum filaments
3 first are wound around circle
4 second are wound around circle
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the structural representation of negative electrode filament provided by the invention, is described in detail the present invention below in conjunction with Fig. 1.
The invention provides negative electrode filament and can be used for travelling wave tube.This negative electrode filament comprises molybdenum filament 2 and tungsten-rhenium wire 1, described tungsten-rhenium wire 1 continuous winding is in the periphery of described molybdenum filament 2, wherein, the described tungsten-rhenium wire 1 of continuous winding on described molybdenum filament 2 periphery comprises the first winding circle 3 and second and is wound around circle 4, described first is wound around circle 3 for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle 4 for 1-4 circle, spacing between adjacent two circles is 1-4mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.5-2mm.
According to the present invention, described negative electrode filament is had better be wound around stability to improve further, and thermal uniformity is better, preferably described first be wound around circle 3 for 48-53 circle, spacing between adjacent two circles is 0.23-0.27mm, described second is wound around circle 4 for 1-3 circle, and the spacing between adjacent two circles is 1-3mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.5-1mm.
More preferably, described first is wound around circle 3 for 49-51 circle, and the spacing between adjacent two circles is 0.25-0.26mm, and described second is wound around circle 4 for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.6-0.8mm.
According to the present invention, to the diameter of described molybdenum filament 2, there is no particular limitation, can be the conventional diameter of this area.Such as, the diameter of described molybdenum filament 2 is 0.2-1mm, is preferably 0.6-0.8mm.
According to the present invention, to the diameter of described tungsten-rhenium wire 1, also there is no particular limitation, can be the conventional diameter of this area.Such as, the diameter of described tungsten-rhenium wire 1 is 0.1-0.2mm, is preferably 0.13-0.17mm.
According to the present invention, the diameter of described negative electrode filament is 0.4-1.4mm, is preferably 0.73-0.97mm.The diameter of the diameter of described negative electrode filament refers to that the diameter of described molybdenum filament adds the diameter of the described tungsten-rhenium wire of a circle be wrapped on described molybdenum filament, and namely molybdenum filament diameter adds the diameter of 2 tungsten-rhenium wires.
In addition, in the present invention, be wound around circle 3 and described second to described first and be wound around the number of circle 4 there is no particular limitation, suitably can select according to the product of desired acquisition.As a preferred embodiment of the present invention, described first winding circle 3 and described second is wound around circle 4 and can be respectively 1-4, and the length of described negative electrode filament can be 10.5-138mm.
The preparation method that a kind of negative electrode filament is also provided of the present invention, the method comprises the operation of tungsten-rhenium wire 1 continuous winding on the periphery of molybdenum filament 2, wherein, the described tungsten-rhenium wire 1 of continuous winding on described molybdenum filament 2 periphery comprises the first winding circle 3 and second and is wound around circle 4, described first is wound around circle 3 for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle 4 for 1-4 circle, spacing between adjacent two circles is 1-4mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.5-2mm.
Preferably, described first is wound around circle 3 for 48-53 circle, and the spacing between adjacent two circles is 0.23-0.27mm, and described second is wound around circle 4 for 1-3 circle, spacing between adjacent two circles is 1-3mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.5-1mm.
More preferably, described first is wound around circle 3 for 49-51 circle, and the spacing between adjacent two circles is 0.25-0.26mm, and described second is wound around circle 4 for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and described first winding circle 3 and described second spacing be wound around between circle 4 is 0.6-0.8mm.
In addition, the diameter of described negative electrode filament is 0.4-1.4mm, is preferably 0.73-0.97mm.The diameter of described negative electrode filament refers to that the diameter of described molybdenum filament adds the diameter of the described tungsten-rhenium wire of a circle be wrapped on described molybdenum filament, and namely molybdenum filament diameter adds the diameter of 2 tungsten-rhenium wires.
Preparation in accordance with the present invention, only can obtain the negative electrode filament of said structure, and the conventional various methods in this area can be adopted to carry out.The preferred described tungsten-rhenium wire 1 of the present invention relative to the vertical plane of described molybdenum filament 2 direct of travel move in a circle carry out winding obtain, described first winding circle 3 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 125-135mm/min and obtains, described second winding circle 4 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 45-60mm/min and obtains, and described first winding circle 1 and the second winding circle 2 are spaced and continuous winding.
More preferably, described first winding circle 3 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 130-135mm/min and obtains, and described second winding circle 4 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 48-58mm/min and obtains.
Further preferably, described first winding circle 3 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 131-133mm/min and obtains, and described second winding circle 4 carries out winding by described molybdenum filament 2 gait of march 15-15.5mm/min and tungsten-rhenium wire 1 speed of wrap 50-55mm/min and obtains.
According to method of the present invention, to the diameter of described molybdenum filament 2, there is no particular limitation, can be the conventional diameter of this area.Such as, the diameter of described molybdenum filament 2 is 0.2-1mm, is preferably 0.6-0.8mm.
According to method of the present invention, to the diameter of described tungsten-rhenium wire 1, also there is no particular limitation, can be the conventional diameter of this area.Such as, the diameter of described tungsten-rhenium wire 1 is 0.1-0.2mm, is preferably 0.13-0.17mm.
Of the present inventionly also provide a kind of negative electrode lamp, this negative electrode lamp comprises negative electrode filament described above.
Negative electrode lamp according to the present invention is applicable to microwave electrovacuum field.
Below by embodiment, the present invention is further detailed, but the present invention is not limited in following embodiment.
Embodiment 1
What the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 131mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 50mm/min carries out tungsten-rhenium wire 1, obtain filament (length is 17.05mm).Its structure is as follows: first to be wound around the number of turns of circle 3 be 49 circles, adjacent two circles be spaced apart 0.25mm, described second number of turns being wound around circle 4 is 2 circles, adjacent two circles be spaced apart 2mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 0.8mm.
Embodiment 2
What the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 133mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 50mm/min carries out tungsten-rhenium wire 1, obtain filament (length is 16.96mm).Its structure is as follows: first number of turns being wound around circle 3 is 51 circles, adjacent two circle be spaced apart 0.26mm, described second to be wound around the number of turns of circle 4 be 2 circles, adjacent two circles be spaced apart 1.5mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 0.7mm.
Embodiment 3
What the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 133mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 55mm/min carries out tungsten-rhenium wire 1, obtain filament (length is 19.26mm).Its structure is as follows: first number of turns being wound around circle 3 is 51 circles, adjacent two circle be spaced apart 0.26mm, described second to be wound around the number of turns of circle 4 be 3 circles, adjacent two circles be spaced apart 1.8mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 0.6mm.
Comparative example 1
Carry out according to the method for embodiment 1, in being wound around second, the speed of wrap of tungsten-rhenium wire 1 is 40mm/min, obtains filament (length is 15.75mm).Its structure is as follows: what the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 131mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 40mm/min carries out tungsten-rhenium wire 1, obtain filament.Its structure is as follows: first to be wound around the number of turns of circle 3 be 49 circles, adjacent two circles be spaced apart 0.25mm, described second number of turns being wound around circle 4 is 1 circle, adjacent two circles be spaced apart 2.5mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 1mm.
Comparative example 2
Carry out according to the method for embodiment 1, in being wound around first, the speed of wrap of tungsten-rhenium wire 1 is 110mm/min, obtains filament (length is 18.34mm).Its structure is as follows: what the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 110mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 50mm/min carries out tungsten-rhenium wire 1, obtain filament.Its structure is as follows: first to be wound around the number of turns of circle 3 be 42 circles, adjacent two circles be spaced apart 0.32mm, described second number of turns being wound around circle 4 is 2 circles, adjacent two circles be spaced apart 2mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 0.9mm.
Comparative example 3
Carry out according to the method for embodiment 1, to be wound around and in the second winding unlike first, the speed of wrap of tungsten-rhenium wire 1 be 155mm/min then speed of wrap become 80mm/min, obtain filament (length is 13.5mm).Its structure is as follows: what the speed of wrap being 15mm/min and tungsten-rhenium wire 1 with the gait of march of molybdenum filament 2 carried out tungsten-rhenium wire 1 for 155mm/min first is wound around, then, the speed of wrap of tungsten-rhenium wire 1 is become the second winding that 80mm/min carries out tungsten-rhenium wire 1, obtain filament.Its structure is as follows: first number of turns being wound around circle 3 is 60 circles, adjacent two circle be spaced apart 0.15mm, described second to be wound around the number of turns of circle 4 be 5 circles, adjacent two circles be spaced apart 0.8mm, described first is wound around circle and described second, and to be wound around the spacing between enclosing be 0.5mm.
The filament obtained in embodiment 1-3 and comparative example 1-3 is detected according to following method of testing:
Burn-out life: burn-out life decision method adopts filament charge passed, filament conduction time is 2 minutes, and opening time is 5 minutes, continuous break-make, until filament blow, draws filament break-make number of times, thus can judge burn-out life length.
Displacement measurement: after filament winding terminates, filament is continued energising 7200 minutes, then under being positioned over universal tool-measuring microscope, magnify 20, measure tungsten-rhenium wire pitch on filament, to show on filament whether tungsten-rhenium wire is subjected to displacement and then whether determine filament qualified.
Result of the test is as following table:
Example 1-3 burn-out life is all more than 10,000 times as can be seen from the above table, also much larger than comparative example 1-3; On example 1-3 filament, tungsten-rhenium wire displacement is all 0, is much better than comparative example 1-3.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (13)
1. a negative electrode filament, it is characterized in that, this negative electrode filament comprises molybdenum filament (2) and tungsten-rhenium wire (1), described tungsten-rhenium wire (1) continuous winding is in the periphery of described molybdenum filament (2), wherein, the described tungsten-rhenium wire (1) of continuous winding on described molybdenum filament (2) periphery comprises the first winding circle (3) and second and is wound around circle (4), described first is wound around circle (3) for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle (4) for 1-4 circle, spacing between adjacent two circles is 1-4mm, it is 0.5-2mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
2. negative electrode filament according to claim 1, wherein, described first is wound around circle (3) for 48-53 circle, spacing between adjacent two circles is 0.23-0.27mm, described second is wound around circle (4) for 1-3 circle, spacing between adjacent two circles is 1-3mm, and it is 0.5-1mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
3. negative electrode filament according to claim 2, wherein, described first is wound around circle (3) for 49-51 circle, spacing between adjacent two circles is 0.25-0.26mm, described second is wound around circle (4) for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and it is 0.6-0.8mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
4. according to the negative electrode filament in claim 1-3 described in any one, wherein, the diameter of described molybdenum filament (2) is 0.2-1mm.
5. negative electrode filament according to claim 4, wherein, the diameter of described molybdenum filament (2) is 0.6-0.8mm.
6. according to the negative electrode filament in claim 1-3 described in any one, wherein, the diameter of described tungsten-rhenium wire (1) is 0.1-0.2mm.
7. negative electrode filament according to claim 6, wherein, the diameter of described tungsten-rhenium wire (1) is 0.13-0.17mm.
8. according to the negative electrode filament in claim 1-3 described in any one, wherein, the diameter of described filament is 0.4-1.4mm.
9. the preparation method of a negative electrode filament, the method comprises the operation of tungsten-rhenium wire (1) continuous winding on the periphery of molybdenum filament (2), wherein, the described tungsten-rhenium wire (1) of continuous winding on described molybdenum filament (2) periphery comprises the first winding circle (3) and second and is wound around circle (4), described first is wound around circle (3) for 45-55 circle, spacing between adjacent two circles is 0.2-0.3mm, described second is wound around circle (4) for 1-4 circle, spacing between adjacent two circles is 1-4mm, it is 0.5-2mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
10. the preparation method of a kind of negative electrode filament according to claim 9, wherein, described first is wound around circle (3) for 48-53 circle, spacing between adjacent two circles is 0.23-0.27mm, described second is wound around circle (4) for 1-3 circle, spacing between adjacent two circles is 1-3mm, and it is 0.5-1mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
The preparation method of 11. a kind of negative electrode filaments according to claim 10, wherein, described first is wound around circle (3) for 49-51 circle, spacing between adjacent two circles is 0.25-0.26mm, described second is wound around circle (4) for 2-3 circle, spacing between adjacent two circles is 1.5-2mm, and it is 0.6-0.8mm that described first winding circle (3) and described second is wound around the spacing of enclosing between (4).
12. according to the preparation method of a kind of negative electrode filament in claim 9-11 described in any one, and wherein, the diameter of described molybdenum filament (2) is 0.2-1mm, and the diameter of described tungsten-rhenium wire (1) is 0.1-0.2mm.
13. 1 kinds of negative electrode lamps, is characterized in that, this negative electrode lamp comprises the negative electrode filament in claim 1-8 described in any one, or this negative electrode lamp comprises the preparation-obtained negative electrode filament of method in claim 9-12 described in any one.
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| CN201238030Y (en) * | 2008-08-18 | 2009-05-13 | 湖州太箭照明有限公司 | Double-main filament type triple-helical energy-saving lamp filament |
| CN102468092A (en) * | 2010-11-03 | 2012-05-23 | 中国科学院电子学研究所 | Method for preparing heat element for heated cathode |
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| KR20050009420A (en) * | 2003-07-16 | 2005-01-25 | 엘지.필립스 디스플레이 주식회사 | Cathode Lay Tube Including Electron Gun Having High Efficiency Heater |
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| CN201238030Y (en) * | 2008-08-18 | 2009-05-13 | 湖州太箭照明有限公司 | Double-main filament type triple-helical energy-saving lamp filament |
| CN102468092A (en) * | 2010-11-03 | 2012-05-23 | 中国科学院电子学研究所 | Method for preparing heat element for heated cathode |
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