CN207217456U - Large power long life-span cathode heater sub-assembly - Google Patents
Large power long life-span cathode heater sub-assembly Download PDFInfo
- Publication number
- CN207217456U CN207217456U CN201721122960.0U CN201721122960U CN207217456U CN 207217456 U CN207217456 U CN 207217456U CN 201721122960 U CN201721122960 U CN 201721122960U CN 207217456 U CN207217456 U CN 207217456U
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- Prior art keywords
- heater
- negative electrode
- double
- span
- assembly
- 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.)
- Expired - Fee Related
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- 239000000919 ceramic Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000007323 disproportionation reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- Solid Thermionic Cathode (AREA)
Abstract
The utility model discloses a kind of large power long life-span cathode heater sub-assembly, including negative electrode and heater, the heater is one week annular heater formed of double end double helix cylinder curvature, wherein, long wire foot is drawn from the diametric(al) of double end double helix cylinder, and short wire foot is drawn from the semicircle cambered surface direction of double end double helix cylinder.Structure (is circularized) by cylinder curvature using double end double helix, annular, former double helical heater negative electrode is overcome due to the negative electrode axial direction temperature distributing disproportionation caused by the cold end effect at negative electrode both ends is even the problem of, it is improved the cathode heater life-span, cathode surface temperature is evenly distributed, and negative electrode operating point temperature can reduce；Obtained cathode heater sub-assembly, the startup time that negative electrode works can be made to shorten half or so, make heater fixation, reduce negative electrode heating power.
Description
Technical field
It the utility model is related to powerful vacuum field of electronic devices, and in particular to a kind of large power long life-span cathode heater
Sub-assembly.
Background technology
In the prior art, the cathode heater structure in powerful vacuum electronic device, there is single-screw, double helix, folding type
And incense coil type.At present search the powerful vacuum electronic device life-span come to an end the reason for when, generally not due to active material
Exhaust, but heated filament damages, this is all due to magnetic field caused by the heater power supply of alternation and vacuum electron device axial magnetic field
Interaction, makes mechanical force of the heated filament by an alternation.Obviously, heater current is bigger, and interaction force is also bigger, heated filament by
It is also bigger to vibration frequency, work long hours more fragile, reduce working life.Although later cathode heater design structure is adopted
With double helix, folding type and incense coil type, this has certain effect for the not high vacuum electron device of small-power and life requirements, but
For the vacuum electron device in large power long life-span, do not improved fundamentally.
The content of the invention
Deficiency of the purpose of this utility model aiming at above-mentioned technology, there is provided a kind of long lifespan, power are big and start fast
Large power long life-span cathode heater sub-assembly.
To achieve the above object, the large power long life-span cathode heater sub-assembly designed by the utility model, including negative electrode
And heater, the heater are the annular heater that double end double helix cylinder curvature one week is formed, wherein, long wire foot is from double end pair spiral shells
The diametric(al) of rounding post is drawn, and short wire foot is drawn from the semicircle cambered surface direction of double end double helix cylinder.
Further, the pitch of the annular heater is evenly arranged.
Further, the internal diameter of the annular heater be 17.5~18.0mm, external diameter be 33.0~34.0mm
Further, the space between negative electrode and the annular heater is filled with ceramic packing.
Compared with prior art, the utility model has advantages below：The present invention is using double end double helix, annular (by justifying
Post bending circularizes) structure, overcome negative electrode of the former double helical heater negative electrode caused by the cold end effect at negative electrode both ends
The problem of Axial Temperature Distribution is uneven, it is improved the cathode heater life-span, cathode surface temperature is evenly distributed, negative electrode work
Point temperature can reduce；Obtained cathode heater sub-assembly, the startup time that negative electrode works can be made to shorten half or so, consolidate heater
It is fixed firm, reduce negative electrode heating power.
Brief description of the drawings
Fig. 1 is the utility model large power long life-span cathode heater sub-assembly heater structural representation.
Each part numbers are as follows in figure：
Heater 1, long wire foot 2, short wire foot 3.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Large power long life-span cathode heater sub-assembly, including negative electrode and heater 1, heater 1 are double end double helix cylinder curvature
The annular heater that one week and pitch are evenly arranged, the internal diameter of annular heater is 17.5~18.0mm (being preferably 17.8mm),
External diameter is 33.0~34.0mm (being preferably 33.5mm)；Long wire foot 2 is drawn from the diametric(al) of double end double helix cylinder, by short silk
Pin 3 is drawn from the semicircle cambered surface direction of double end, double helix cylinder；In addition, the space filling between negative electrode and annular heater
There is ceramic packing.
The utility model (is circularized) structure using double end double helix, annular by cylinder curvature, obtains the cathode heater life-span
To raising, cathode surface temperature is evenly distributed, and negative electrode operating point temperature can reduce, overcome before double helical heater negative electrode due to
The problem of negative electrode axial direction temperature distributing disproportionation caused by the cold end effect at negative electrode both ends is even；Obtained cathode heater sub-assembly,
The startup time that negative electrode can be made to work shortens half or so, makes heater fixation, reduces negative electrode heating power.
Claims (4)
1. a kind of large power long life-span cathode heater sub-assembly, including negative electrode and heater, it is characterised in that：The heater is double end
One week annular heater formed of double helix cylinder curvature, wherein, long wire foot is drawn from the diametric(al) of double end double helix cylinder,
Short wire foot is drawn from the semicircle cambered surface direction of double end double helix cylinder.
2. large power long life-span cathode heater sub-assembly according to claim 1, it is characterised in that：The annular heater
Pitch is evenly arranged.
3. large power long life-span cathode heater sub-assembly according to claim 1 or claim 2, it is characterised in that：The annular heat
The internal diameter of son is 17.5~18.0mm, external diameter is 33.0~34.0mm.
4. large power long life-span cathode heater sub-assembly according to claim 1 or claim 2, it is characterised in that：The negative electrode and circle
Space between annular heater is filled with ceramic packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721122960.0U CN207217456U (en) | 2017-09-04 | 2017-09-04 | Large power long life-span cathode heater sub-assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721122960.0U CN207217456U (en) | 2017-09-04 | 2017-09-04 | Large power long life-span cathode heater sub-assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207217456U true CN207217456U (en) | 2018-04-10 |
Family
ID=61826645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721122960.0U Expired - Fee Related CN207217456U (en) | 2017-09-04 | 2017-09-04 | Large power long life-span cathode heater sub-assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207217456U (en) |
-
2017
- 2017-09-04 CN CN201721122960.0U patent/CN207217456U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180410 |