CN206921781U - Velocity modulation tube electron gun thin-walled side heat shielding part - Google Patents
Velocity modulation tube electron gun thin-walled side heat shielding part Download PDFInfo
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- CN206921781U CN206921781U CN201720684025.7U CN201720684025U CN206921781U CN 206921781 U CN206921781 U CN 206921781U CN 201720684025 U CN201720684025 U CN 201720684025U CN 206921781 U CN206921781 U CN 206921781U
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- straight tube
- cylindrical straight
- heat shielding
- side heat
- transition
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Abstract
The utility model discloses a kind of velocity modulation tube electron gun thin-walled side heat shielding part, including the first cylindrical straight tube, the second cylindrical straight tube and the tooth form transition frustum cone cylinder for connecting the first cylindrical straight tube and the second cylindrical straight tube；The tooth form transition frustum cone cylinder include round platform body, several be distributed uniformly and circumferentially the upper transition tooth of the round platform body large end face and several be distributed uniformly and circumferentially lower transition tooth in the round platform body small end face；The utility model velocity modulation tube electron gun thin-walled side heat shielding part is sectional forming side heat shielding part, repeatedly complicated stamping drawdown method need not be used during processing, save and cover mould of extending more, it is only necessary to simple spot welding mould, scrapping for part will not be caused in process.
Description
Technical field
It the utility model is related to high-power klystron technical field, and in particular to a kind of velocity modulation tube electron gun thin-walled side heat shielding
Part.
Background technology
Electron gun is the key component of klystron, because velocity modulation tube cathode operating temperature is higher, for ordinary oxide
Negative electrode is at 850 DEG C, and barium-tungsten dispense cathode operating temperature is at 1050 DEG C；In addition, cathode activation temperature requirement is higher, oxide-coated cathode is
1050 DEG C, and barium-tungsten dispense cathode is up to 1250 DEG C.The shell of klystron is probably at 100 DEG C or so, and therefore, the insulation of electron gun just shows
Obtain increasingly important.
The insulation of material, material specification and design shape to electron gun used in parts of electronic gun is crucial factor.
Part material used in electron gun, typically requires high temperature resistant, and conventional material is tungsten, molybdenum and its alloy, tantalum, tantalum-niobium alloy,
Stainless steel etc..And molybdenum or molybdenum alloy are typically all used against cathode portion, in order to reduce heat transfer, material requirements is very thin, typically
In 0.05~0.20mm.In the design close to cathode portion, in addition to emission of cathode face, it is required for heating to shield, i.e., along negative electrode
The face of cylinder is equipped with cylindrical side heat shielding, and lower heat shielding is housed in bottom.
In order to reduce heat radiation and heat transfer, typically there are multilayer side heat shielding and lower heat shielding.Side heat shielding part shape is main
Exactly to be extended part using cylinder-shaped thin wall, lower heat shielding shape mainly uses the hemispherical or planar structure similar to heater bottom surface,
Lower heat shielding typically by heat shielding the belt of spot welding be fixed on lateral support cylinder, and the material of heat shielding is using molybdenum ribbon, no
Become rusty steel band, tantalum-niobium alloy band etc..
Heat shielding part is mainly processed using stamping drawdown method under conventional electron gun.Metal parts is extended, especially
It is the stamping drawdown for Mo, because material ductility itself is poor, material is again thin, is easily broken off damaging during extending
It is bad, cause finished part rate low, high processing costs, and also even if manufacturing, the size of part also is difficult to ensure.This main table
Now, part has horn mouth, i.e. concentric reducer；Different-diameter part transition position easily produce fold, part thickness it is inconsistent, zero
Part Local Cracking etc..Even so, generally require to take ancillary method, advance one piece of thin-walled of spot welding such as on material to be processed
Metal, and the time length of mould testing, die trial cost is high, therefore whole part manufacturing cost is high, trial-production cycle length.
The content of the invention
A kind of deficiency of the purpose of this utility model aiming at above-mentioned technology, there is provided the velocity modulation tube electron gun of sectional forming
Thin-walled side heat shielding part, the heat shielding effects of heat shielding can also be improved.
To achieve the above object, the velocity modulation tube electron gun thin-walled side heat shielding part designed by the utility model, including first
Cylindrical straight tube, the second cylindrical straight tube and the tooth form mistake for connecting the first cylindrical straight tube and the second cylindrical straight tube
Cross frustum cone cylinder；The tooth form transition frustum cone cylinder includes round platform body, several are distributed uniformly and circumferentially in the round platform sheet
The upper transition tooth of body large end face and several be distributed uniformly and circumferentially lower transition tooth in the round platform body small end face；If
The dry upper transition tooth fits with the outer peripheral edge of the described first cylindrical straight tube, several described lower transition teeth and described the
The outer peripheral edge of two cylindrical straight tubes fits；And the axis of the first cylindrical straight tube, the second cylindrical straight tube
Axis and the tooth form transition frustum cone cylinder axis three overlap.
Further, several described upper transition teeth and the axisymmetrical of the described first cylindrical straight tube are distributed.
Further, several described lower transition teeth and the axisymmetrical of the described second cylindrical straight tube are distributed.
Further, the internal diameter of the described first cylindrical straight tube is more than the internal diameter of the described second cylindrical straight tube；The tooth
The large end face internal diameter of shape transition frustum cone cylinder is equal to the external diameter of the described first cylindrical straight tube, the small end of the tooth form transition frustum cone cylinder
Face internal diameter is equal to the external diameter of the described second cylindrical straight tube.
Further, the thickness of the described first cylindrical straight tube, the thickness of the second cylindrical straight tube and the tooth form
The thickness three of transition frustum cone cylinder is identical.
Compared with prior art, the utility model has advantages below：The utility model velocity modulation tube electron gun thin-walled side heat
Screen part is sectional forming side heat shielding part, need not use repeatedly complicated stamping drawdown method during processing, save more sets and draw
Stretch mould, it is only necessary to simple spot welding mould, scrapping for part will not be caused in process；Avoid thin-walled parts Multi-step forming
Extend, significantly reduce the difficulty of processing of parts of electronic gun, shorten the trial-production cycle, reduce manufacturing cost, and improve
The yield rate of part.
Brief description of the drawings
Fig. 1 is the utility model velocity modulation tube electron gun thin-walled side heat shielding design of part schematic diagram.
Each part numbers are as follows in figure：
First cylindrical straight tube 1, the second cylindrical straight tube 2, tooth form transition frustum cone cylinder 3, upper transition tooth 4, lower transition tooth 5,
Round platform body 6.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
The utility model velocity modulation tube electron gun thin-walled side heat shielding part, including the first cylindrical straight tube 1, the second cylindrical straight
Cylinder 2 and the tooth form transition frustum cone cylinder 3 for connecting the first cylindrical 1 and second cylindrical straight tube 2 of straight tube；As shown in figure 1, tooth form transition
If frustum cone cylinder 3 include round platform body 6, several be distributed uniformly and circumferentially the large end face of round platform body 6 upper transition tooth 4 and
The dry lower transition tooth 5 being distributed uniformly and circumferentially in the small end face of round platform body 6；The cylinder of transition tooth 4 and first on several
The outer peripheral edge of shape straight tube 1 fits, the axisymmetrical distribution of all upper 4 and first cylindrical straight tubes 1 of transition tooth；Several were descended
Cross tooth 5 and the outer peripheral edge of the second cylindrical straight tube 2 fits, the axisymmetrical of all lower 5 and second cylindrical straight tubes 2 of transition tooth
Distribution；And first cylindrical straight tube 1 axis, the axis and the axis of tooth form transition frustum cone cylinder 3 of the second cylindrical straight tube 2
Three overlaps.
Wherein, the internal diameter of the first cylindrical straight tube 1 is more than the internal diameter of the second cylindrical straight tube 2；Tooth form transition frustum cone cylinder 3
Large end face internal diameter is equal to the external diameter of the first cylindrical straight tube 1, and the small end face internal diameter of 3, tooth form transition round platform is equal to the second cylinder
The external diameter of straight tube 2；The thickness of the thickness of first cylindrical straight tube 1, the thickness of the second cylindrical straight tube 2 and tooth form transition frustum cone cylinder 3
It is identical to spend three.
Wherein first cylindrical straight tube, the second cylindrical straight tube and the connection first cylindrical straight tube and second circle
The transition frustum cone cylinder of cylindricality straight tube can independently form part, can also the first cylindrical straight tube and the second cylindrical straight tube
Combine to form part with transition round platform respectively, can also three together combination form part.
In summary, the utility model velocity modulation tube electron gun thin-walled side heat shielding part is sectional forming side heat shielding part, is added
Man-hour need not use repeatedly complicated stamping drawdown method, save and cover mould of extending more, it is only necessary to simple spot welding mould, process
During will not cause scrapping for part；Avoid thin-walled parts Multi-step forming to extend, significantly reduce parts of electronic gun
Difficulty of processing, shorten the trial-production cycle, reduce manufacturing cost, and improve the yield rate of part.
Claims (5)
- A kind of 1. velocity modulation tube electron gun thin-walled side heat shielding part, it is characterised in that：Including the first cylindrical straight tube, the second cylinder Straight tube and the tooth form transition frustum cone cylinder for connecting the first cylindrical straight tube and the second cylindrical straight tube；The tooth form transition If frustum cone cylinder include round platform body, several be distributed uniformly and circumferentially the round platform body large end face upper transition tooth and The dry lower transition tooth being distributed uniformly and circumferentially in the round platform body small end face；Several described upper transition teeth with it is described The outer peripheral edge of first cylindrical straight tube fits, several described lower transition teeth and the outer peripheral edge phase of the described second cylindrical straight tube Fitting；And the axis of the first cylindrical straight tube, the axis of the second cylindrical straight tube and the tooth form transition circle Platform cylinder axis three overlaps.
- 2. velocity modulation tube electron gun thin-walled side heat shielding part according to claim 1, it is characterised in that：Several described upper transition Tooth and the axisymmetrical of the described first cylindrical straight tube are distributed.
- 3. velocity modulation tube electron gun thin-walled side heat shielding part according to claim 1, it is characterised in that：Several described lower transition Tooth and the axisymmetrical of the described second cylindrical straight tube are distributed.
- 4. according to the velocity modulation tube electron gun thin-walled side heat shielding part of claim 1 or 2 or 3, it is characterised in that：First circle The internal diameter of cylindricality straight tube is more than the internal diameter of the described second cylindrical straight tube；The large end face internal diameter of the tooth form transition frustum cone cylinder is equal to The external diameter of the first cylindrical straight tube, the small end face internal diameter of the tooth form transition frustum cone cylinder are equal to the described second cylindrical straight tube External diameter.
- 5. according to the velocity modulation tube electron gun thin-walled side heat shielding part of claim 1 or 2 or 3, it is characterised in that：First circle The thickness three of the thickness of cylindricality straight tube, the thickness of the second cylindrical straight tube and the tooth form transition frustum cone cylinder is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720684025.7U CN206921781U (en) | 2017-06-13 | 2017-06-13 | Velocity modulation tube electron gun thin-walled side heat shielding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720684025.7U CN206921781U (en) | 2017-06-13 | 2017-06-13 | Velocity modulation tube electron gun thin-walled side heat shielding part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206921781U true CN206921781U (en) | 2018-01-23 |
Family
ID=61313828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720684025.7U Active CN206921781U (en) | 2017-06-13 | 2017-06-13 | Velocity modulation tube electron gun thin-walled side heat shielding part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206921781U (en) |
-
2017
- 2017-06-13 CN CN201720684025.7U patent/CN206921781U/en active Active
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