CN205992521U - A kind of slow-wave structure of helix TWT - Google Patents
A kind of slow-wave structure of helix TWT Download PDFInfo
- Publication number
- CN205992521U CN205992521U CN201620960194.4U CN201620960194U CN205992521U CN 205992521 U CN205992521 U CN 205992521U CN 201620960194 U CN201620960194 U CN 201620960194U CN 205992521 U CN205992521 U CN 205992521U
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- helix
- supporting rod
- slow
- wave structure
- plane
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Abstract
The utility model discloses a kind of slow-wave structure of helix TWT, including being from inside to outside sequentially connected fixing helix, supporting rod and shell；The effective coverage face contacting with helix on supporting rod internal face is provided with active metallization layer；Arranging for plane for the joint face being connected corresponding with supporting rod internal face in helix outside wall surface；Along the axis direction of helix, the outside wall surface of supporting rod is in the first inclined-plane setting；The internal face of shell is provided with second inclined-plane corresponding with the outside wall surface of supporting rod.This utility model by using brazing metal so that after welding solder can fill slight void on supporting rod and helix contact surface so as to be in close contact completely, its thermal resistance very little, have and can reduce thermal contact resistance, the advantages of raising slow-wave structure radiating efficiency.
Description
Technical field
This utility model is related to vacuum electron device field, particularly to a kind of slow-wave structure of helix TWT.
Background technology
Spiral line type travelling-wave tube is widely used in multiple neck such as radar system, communication system because having wide band characteristic
Domain, but the heat-sinking capability of this kind of travelling-wave tube slow-wave structure is limited, restricts the raising of its mean power.
The slow-wave structure of conventional helical line travelling-wave tube is generally led to by helix, equally distributed three supporting rods and shell
Cross certain clamp method to combine.More than high power travelling wave tube slow wave system, the pole shoe using pure iron material is closed with ambrose alloy at present
The shell that the gasket ring of golden material is welded, clamp method is in the cold state helix and supporting rod to be fixed post-heating shell
It is made slightly to expand, using mould by helix and clamping bar assembly quick insertion shell.Helix and clamping in the method
Bar connects for plane contact, due to the impossible minute surface completely of contact surface on microcosmic, therefore certainly exists space, the bigger heat in space
Resistance is bigger, and interface temperature rise is bigger, and heat-sinking capability is poorer；And affected by piece surface is coarse, using this chucking method composition
Slow wave system meeting forming part space between helix and supporting rod interface, thus producing larger thermal contact resistance, affects slow wave
The radiating efficiency of system.When mean power is lifted further, easily helix and is burned out in the travelling-wave tube of the method preparation
With job insecurity phenomenon.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of slow-wave structure of helix TWT；This slow-wave structure
By using brazing metal so that after welding solder can fill slight void on supporting rod and helix contact surface so as to complete
Full close contact, thermal resistance very little, can be considered and eliminate hot interface between helix and supporting rod, all heats on helix
Conduct to supporting rod, significantly reduce the thermal contact resistance between helix and supporting rod, substantially increase helix row
The heat-sinking capability of wave duct slow-wave structure and radiating efficiency, while ensure that slow-wave structure has good axiality, also really
Protect travelling-wave tube and there is higher Beam transmission；And slow-wave structure provided by the utility model clamps also by changing
Bar and the structure of shell, in order to make, helix, supporting rod and shell are pre-installed in clamping process first and then a step completes entirety
Assembling provides prerequisite.
For solving above-mentioned technical problem, this utility model adopts following technical proposals：
A kind of slow-wave structure of helix TWT, described slow-wave structure includes from inside to outside being sequentially connected fixing spiral
Line, supporting rod and shell；
The effective coverage face contacting with described helix on described supporting rod internal face is provided with active metallization
Layer；
In described helix outside wall surface is flat for the joint face being connected corresponding with described supporting rod internal face
Face is arranged；
Along the axis direction of described helix, the outside wall surface of described supporting rod is in the first inclined-plane setting；Described shell interior
Wall is provided with second inclined-plane corresponding with the outside wall surface of described supporting rod, and described first inclined-plane is mated with described second inclined-plane
Be connected and fixed.
Further, described active metallization layer includes the first metal layer, the second metal from inside to outside setting gradually
Change layer and the 3rd metal layer；The material of described first metal layer is titanium, and thickness is 0.02-0.03 μm；Described second metal
The material changing layer is molybdenum, and thickness is 0.04-0.05 μm；The material of described 3rd metal layer is copper, and thickness is 4-5 μm.
Because supporting rod is ceramic material, the metal layer on traditional supporting rod only has one layer of spelter solder, with ceramic material
Bonding is insecure.This patent employs active metal titanium as ground floor, and titanium and pottery can produce chemical reaction, as metallization
The substrate of layer can be more firm with ceramic bonding, and as the second layer, molybdenum is because that the swell increment of molybdenum is less, close with pottery, permissible
Play transitional function between the less pottery of the larger copper of swell increment and swell increment, prevent from expanding, due to layers of copper, the metal causing
Change layer to come off.
Further, along helix axis front end to axis extreme direction, the incline direction on described first inclined-plane is in lean on
The axis direction of nearly helix tilts.
Further, described slow-wave structure includes being in three structures of uniform arrangement setting along described helix circumferential direction
Identical supporting rod.
This utility model compared with prior art, has as follows actively beneficial effect：
1st, slow-wave structure provided by the utility model by using brazing metal so that welding after solder can fill clamping
Slight void on bar and helix contact surface so as to be in close contact completely, thermal resistance very little, can be considered and eliminate helix and folder
Hold hot interface between bar, on helix, all heats all can conduct to supporting rod, significantly reduces helix and clamping
Thermal contact resistance between bar, substantially increases heat-sinking capability and the radiating efficiency of helix TWT slow wave structure, ensure that
While slow-wave structure has good axiality, also ensure travelling-wave tube and there is higher Beam transmission.
2nd, because supporting rod is ceramic material, the metal layer on traditional supporting rod only has one layer of spelter solder, with ceramic material
Material bonding is insecure.This patent employs active metal titanium as ground floor, and titanium and pottery can produce chemical reaction, as metal
The substrate changing layer can be more firm with ceramic bonding, and as the second layer, molybdenum is because that the swell increment of molybdenum is less, close with pottery, can
Play transitional function between the less pottery of the copper larger in swell increment and swell increment, prevent from expanding, due to layers of copper, the gold causing
Genusization layer comes off.
3rd, this utility model, by the improvement to helix structure, supporting rod structure and shell structure, utilizes at high temperature
" helix-supporting rod " interference fit between assembly and Can, forms certain pressure on three's weld interface, thus
Realize the welding of Can and ceramic supporting rod in slow-wave structure clamping process, and realize while clamping supporting rod with
The welding of helix, be can be used in high-power spiral line row wave tube by the slow-wave structure that this preparation method obtains, and having can
Reduce the advantages of thermal contact resistance, raising slow-wave structure radiating efficiency.
4th, slow-wave structure provided by the utility model in the cold state, by the cooperation on the first inclined-plane and the second inclined-plane, edge
The axis direction of described helix, helix, supporting rod and shell are fitted together in advance, and the advantage of prepackage is in welding process
It is not susceptible to helix and solder side dislocation on supporting rod, welding and clamping process can a step complete.
Brief description
Fig. 1 is the perspective view of helix in this utility model.
Fig. 2 is the structural front view of helix in this utility model.
Fig. 3 is one of perspective view of supporting rod in this utility model.
Fig. 4 is the structural front view of supporting rod in this utility model.
Fig. 5 is two of the perspective view of supporting rod in this utility model.
Fig. 6 is three of the perspective view of supporting rod in this utility model.
Fig. 7 is the structural representation of shell in this utility model.
Fig. 8 is the structural representation in inner wall of tube shell face in this utility model.
Fig. 9 is the Rotating fields schematic diagram of active metallization layer in this utility model.
Figure 10 is the schematic diagram that in this utility model, helix, supporting rod and shell are fitted together in advance.
Figure 11 is overall structure diagram of the present utility model.
Figure 12 is the integrally-built axial view of this utility model.
Figure 13 is the interface internal-external temperature difference comparison diagram of slow-wave structure provided by the utility model and traditional slow-wave structure.
Figure 14 is the preparation method FB(flow block) of slow-wave structure provided by the utility model.
Specific embodiment
Specific embodiment of the present utility model is described below in conjunction with the accompanying drawings.
As shown in Fig. 1 is to 13, a kind of slow-wave structure of helix TWT, described slow-wave structure is included from inside to outside successively
Helix 1, supporting rod 2 and the shell 3 being connected；Slow-wave structure described in the present embodiment is included along described helix 1 circumference
Direction is in three structure identical supporting rods 2 of uniform arrangement setting.
Activity gold is provided with the effective coverage face 21 contacting with described helix 1 on described supporting rod 2 internal face
Genusization layer 4；In described helix 1 outside wall surface for the joint face 11 that be connected corresponding with described supporting rod 2 internal face
For plane setting；Along helix 1 axis 12 front end to axis 12 extreme direction, the outside wall surface of described supporting rod 2 is in first oblique
Face 22 is arranged, and the incline direction on this first inclined-plane 22 is in tilt near axis 12 direction of helix 1；In described shell 3
Wall is provided with second inclined-plane 31 corresponding with the outside wall surface of described supporting rod 2, and described first inclined-plane 22 is oblique with described second
Face 31 is matchingly connected and fixed.
Further, described active metallization layer 4 includes the first metal layer 41, the second gold medal from inside to outside setting gradually
Genusization layer 42 and the 3rd metal layer 43；The material of described first metal layer 41 is titanium, and thickness is 0.02-0.03 μm；Described
The material of the second metal layer 42 is molybdenum, and thickness is 0.04-0.05 μm；The material of described 3rd metal layer 43 is copper, thickness
For 4-5 μm.
As shown in Fig. 1 is to 14, a kind of preparation method for slow-wave structure above-mentioned in the present embodiment, the method includes as follows
Step：
S1, the outside wall surface of supporting rod 2 is processed into inclined-plane, obtains the first inclined-plane 22；
S2, according to the magnitude of interference, the internal face of the shell 3 corresponding with the outside wall surface of supporting rod 2 processes with described
First inclined-plane 22 mates corresponding second inclined-plane 31；Described in the present embodiment, the magnitude of interference is specially 0.01mm；
S3, on described supporting rod 2 internal face sputter active metallization layer 4；Specifically, beryllium oxide supporting rod 2 is loaded
In mask mould, the internal face being contacted with helix 1 is only exposed on supporting rod 2, this supporting rod 2 internal face first sputters one
Layer the first metal layer 41 titanium film, redeposited one layer of second metal layer 42 molybdenum film, finally sputter one layer of the 3rd metal layer 43
Layers of copper, and then active metallization layer 4 is formed on supporting rod 2 internal face；
S4, the joint face 11 that be connected corresponding with described supporting rod 2 internal face will be used in helix 1 outside wall surface
It is processed into plane；The difference in height of wherein joint face 11 outside wall surface of helix in arcuation with other is 0.03-0.05mm；
S5, according to helix 1 pitch dimension, using blue laser remove supporting rod 2 internal face on not with helix 1 phase
Active metallization layer 4 on the non-active area face 23 of contact；And then the activity on effective coverage face 21 on supporting rod 2 internal face
Metal layer 4 forms the solder side corresponding with the joint face 11 being processed to plane on helix 1；
S6, in the cold state, by the cooperation on the first inclined-plane 22 and the second inclined-plane 31, along axis 12 side of described helix 1
To helix 1, supporting rod 2 and shell 3 are fitted together in advance；Specifically, limit the relative position of shell 3 one end, spiral shell with mould
Spin line 1 is inserted from the other end with supporting rod 2, because shell 3 inner chamber is taper, the maximum of the helix of insertion and clamping bar assembly
Diameter is larger than remaining shell diameter, usually 0.005-0.01mm, so in prepackage, helix 1 and supporting rod 2 from
Other end insertion is up to the position limiting.
S7, heating shell 3, after shell 3 temperature rises to 900 DEG C, will be completely quick to helix 1 and supporting rod 2
Insertion shell 3, is incubated 3-5 minute, obtains the slow-wave structure of helix TWT after cooling.
Feature of the present utility model is, forms activity gold by sputtered titanium on supporting rod 2, molybdenum and the copper as solder
Genusization layer 4, substitutes traditional single metal layer, the combination between the active metallization layer making and beryllium oxide ceramics supporting rod 2
More firm；And realize the welding of supporting rod 2 and helix 1 while clamping, overcome conventional mounting arrangements, i.e. helix 1
Load the defect existing for shell 3 with supporting rod 2 after shell 3 external welding is integral；This utility model will using laser simultaneously
On active metallization layer, redundance removes, and can avoid the high-frequency loss that chemical corrosion method brings, by shown by accompanying drawing 13
Slow-wave structure provided by the utility model and traditional slow-wave structure interface internal-external temperature difference comparison diagram, from figure comparing result
Understand, slow-wave structure interface provided by the utility model internal-external temperature difference is less than the interface internal-external temperature difference of traditional slow-wave structure, boundary
Face internal-external temperature difference less explanation thermal resistance is less, and heat dispersion is better, and then the slow-wave structure obtained by this utility model effectively drops
Thermal contact resistance on low helix and supporting rod interface, greatly improves its heat-sinking capability and radiating efficiency.
Description orientation employed in herein word " on ", D score, "left", "right" etc. be for explanation facilitate base
For the orientation shown in drawing in the accompanying drawing, in actual device these orientation because of device disposing way and
Different.
In sum, embodiment described in the utility model only provides a kind of optimal embodiment, this utility model
Technology contents and technical characterstic have revealed that as above, but one skilled in the art scholar is still potentially based on this utility model and is taken off
The content shown and make the various replacements without departing substantially from this utility model creation spirit and modification；Therefore, protection model of the present utility model
Enclose the technology contents being not limited to disclosed in embodiment, therefore all equivalent changes done according to shape of the present utility model, construction and principle
Change, be encompassed by protection domain of the present utility model.
Claims (4)
1. a kind of slow-wave structure of helix TWT is it is characterised in that described slow-wave structure includes from inside to outside being sequentially connected
Helix, supporting rod and the shell fixed；
The effective coverage face contacting with described helix on described supporting rod internal face is provided with active metallization layer；
Setting for plane for the joint face being connected corresponding with described supporting rod internal face in described helix outside wall surface
Put；
Along the axis direction of described helix, the outside wall surface of described supporting rod is in the first inclined-plane setting；The internal face of described shell
It is provided with second inclined-plane corresponding with the outside wall surface of described supporting rod, described first inclined-plane is matchingly connected with described second inclined-plane
Connect and be fixed together.
2. a kind of slow-wave structure of helix TWT according to claim 1 is it is characterised in that described active metallization
Layer includes the first metal layer, the second metal layer and the 3rd metal layer from inside to outside setting gradually；Described first metal
The material changing layer is titanium, and thickness is 0.02-0.03 μm；The material of described second metal layer is molybdenum, and thickness is 0.04-0.05 μ
m；The material of described 3rd metal layer is copper, and thickness is 4-5 μm.
3. a kind of slow-wave structure of helix TWT according to claim 1 is it is characterised in that axis along helix
Front end extreme direction to axis, the incline direction on described first inclined-plane is in the axis direction inclination near helix.
4. a kind of slow-wave structure of helix TWT according to claim 1 is it is characterised in that described slow-wave structure bag
Including along described helix circumferential direction is in three structure identical supporting rods that uniform arrangement is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620960194.4U CN205992521U (en) | 2016-08-26 | 2016-08-26 | A kind of slow-wave structure of helix TWT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620960194.4U CN205992521U (en) | 2016-08-26 | 2016-08-26 | A kind of slow-wave structure of helix TWT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992521U true CN205992521U (en) | 2017-03-01 |
Family
ID=58107302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620960194.4U Withdrawn - After Issue CN205992521U (en) | 2016-08-26 | 2016-08-26 | A kind of slow-wave structure of helix TWT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158562A (en) * | 2016-08-26 | 2016-11-23 | 中国电子科技集团公司第十二研究所 | The slow-wave structure of a kind of helix TWT and the preparation method of this slow-wave structure |
| CN109702282A (en) * | 2018-11-29 | 2019-05-03 | 南京三乐集团有限公司 | Three plane surface processing method of helix |
-
2016
- 2016-08-26 CN CN201620960194.4U patent/CN205992521U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158562A (en) * | 2016-08-26 | 2016-11-23 | 中国电子科技集团公司第十二研究所 | The slow-wave structure of a kind of helix TWT and the preparation method of this slow-wave structure |
| CN109702282A (en) * | 2018-11-29 | 2019-05-03 | 南京三乐集团有限公司 | Three plane surface processing method of helix |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170301 Effective date of abandoning: 20180102 |