CN202888114U - Multilayer insulating heat shield structure - Google Patents
Multilayer insulating heat shield structure Download PDFInfo
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- CN202888114U CN202888114U CN 201220469966 CN201220469966U CN202888114U CN 202888114 U CN202888114 U CN 202888114U CN 201220469966 CN201220469966 CN 201220469966 CN 201220469966 U CN201220469966 U CN 201220469966U CN 202888114 U CN202888114 U CN 202888114U
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- heat shielding
- intermediate layer
- heat shield
- layer heat
- interlayer
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Abstract
The utility model discloses a multilayer insulating heat shield structure, and relates to the field of microwave electron devices. The structure comprises an outer layer heat shield (1), an interlayer upper heat shield (2), an inner layer heat shield (3), an interlayer lower heat shield (4), and an end cover (5). A lower end of the outer layer heat shield (1) is connected with a lower end of the interlayer lower heat shield (4). An upper end of the interlayer lower heat shield (4) is connected with a lower end of the interlayer upper heat shield (2). The interlayer upper heat shield (2) is connected with an upper end of the inner layer heat shield (3). The end cover (5) is connected with a lower end of the interlayer lower heat shield (4). The structure can ensure power consumption of a lamp filament is lower than 10W, cathode operating temperature reaches higher than 1050 DEG C, and temperature of a housing is controlled lower than 50 DEG C. The heat shield with the structure is added with a plurality of layers of structures, thereby reducing heat radiation, and the multilayer end-to-end structure increases heat conduction distances, so that heat insulation effect of a cathode is improved.
Description
Technical field
The utility model relates to microwave electron tube field, be specifically related to a kind of multiple field insulation heat shielding structure.
Background technology
Travelling wave tube is the microwave vacuum electronic device, utilizes electric field, magnetic field to control electron beam section motion within it, make that electron beam produces, accelerates, motion, collect and and signal interaction so that reach the purpose that signal amplifies.Wherein negative electrode produces electron beam, then utilizes focusing electrode, anode electron-beam convergence, acceleration, forms the electron beam of certain cross sectional shape, size and energy, and radio frequency system finishes the exchange of energy, causes signal to obtain amplifying.The negative electrode that produces electron beam is hot cathode often, and material is generally tungsten, and need to be heated to certain temperature could electron emission.The electron beam current value that travelling wave tube uses is large, and the target emissivities are had relatively high expectations, and needs anticathode working temperature that certain control is arranged, and can work greater than certain temperature.
The electron gun of travelling wave tube generally is comprised of electrodes such as negative electrode, anode and focusing electrodes, and these electrodes are fixed in the electron gun shell.Negative electrode working temperature General Requirements is higher than 1050 ℃, generally adopts filamentray structure to heat to negative electrode.Metallic support is adopted in connection between negative electrode and the shell, can the energy of filament heating be dissipated, like this for make negative electrode obtain required working temperature can cause filament to add heat power consumption excessive, so need to be incubated in negative electrode periphery design heat shielding, reduce the power consumption of filament.The temperature of negative electrode work is very up to arriving thousands of degree simultaneously, and negative electrode from the distance of shell generally in tens millimeters even several millimeters scopes, if there is not heat shielding, so high temperature can cause skin temperature to reach 100 degree, can affect the stability of shell, even can not pack, so also need the heat shielding target to be incubated here.
Heat shielding mainly plays insulation effect, generally adopts individual layer or double-deck heat shielding to be placed on the periphery of negative electrode, and still heat insulation effect is bad like this, causes the power consumption of filament excessive.So multiple negative electrode heat shielding fixed form or multiple negative electrode heat shielding form have just occurred, here mainly adopt a kind of multi-layer heat preserving heat shielding structure, satisfy that the negative electrode working temperature reaches launch requirements in the less situation of filament power consumption, the temperature of shell is controlled in 50 ℃ of scopes simultaneously.
The utility model content
For the deficiency that exists on the prior art, the utility model purpose is to be to provide a kind of multiple field insulation heat shielding structure, and it can guarantee that the filament power consumption reaches temperature more than 1050 ℃ at 10W with the inner cathode working temperature, in 50 ℃ of the simultaneously temperature of the shell controls; The heat shielding of this structure has increased sandwich construction, has reduced the radiation of heat, and the end to end structure of multilayer has increased the heat conduction distance simultaneously, all can improve the heat insulation effect of negative electrode.
To achieve these goals, the utility model is to realize by the following technical solutions: it comprises outer heat shielding, upper end, intermediate layer heat shielding, internal layer heat shielding, lower end, intermediate layer heat shielding and end cap, outer heat shielding lower end links to each other with heat shielding lower end, lower end, intermediate layer, heat shielding upper end, lower end, intermediate layer links to each other with heat shielding lower end, upper end, intermediate layer, upper end, intermediate layer heat shielding links to each other with internal layer heat shielding upper end, and end cap is connected with the lower end of lower end, intermediate layer heat shielding.
Described outer heat shielding, upper end, intermediate layer heat shielding, lower end, intermediate layer heat shielding and internal layer heat shielding connected mode are connected that head and the tail connect.
Described outer heat shielding is the thin wall circular structure, and outer heat shielding two ends are provided with symmetrical groove shape structure, and the thickness of described groove shape structure is 0.15-0.35mm.
Described internal layer heat shielding is the cirque structure that fine sheet is welded, and thickness is 0.015-0.03mm.
Upper end, described intermediate layer heat shielding is the ledge structure that taper changes, and the upper end of upper end, described intermediate layer heat shielding is groove shape structure, the lower end is planar structure, upper and lower side thickness is identical, and be provided with two from top to bottom on the heat shielding outer wall of upper end, intermediate layer and arrange translots, four of every rows, the setting of staggering of two row's translot upper-lower positions.
Lower end, described intermediate layer heat shielding is the saltant ledge structure, and the upper end is groove shape structure, and bottom thin is compared on heat shielding top, lower end, intermediate layer.
The utility model can guarantee that the filament power consumption reaches temperature more than 1050 ℃ at 10W with the inner cathode working temperature, in 50 ℃ of the simultaneously temperature of the shell controls; The heat shielding of this structure has increased sandwich construction, has reduced the radiation of heat, and the end to end structure of multilayer has increased the heat conduction distance simultaneously, all can improve the heat insulation effect of negative electrode.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is structural representation of the present utility model;
Structural representation when Fig. 2 is the utility model and negative electrode use;
Fig. 3 is the structural representation of outer heat shielding 1 of the present utility model;
Fig. 4 is internal layer heat shielding 3 structural representations of the present utility model;
Fig. 5 is the structural representation of lower end, intermediate layer of the present utility model heat shielding 4;
Fig. 6 is the structural representation of upper end, intermediate layer of the present utility model heat shielding 2.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
With reference to Fig. 1-6, this embodiment is by the following technical solutions: it comprises outer heat shielding 1, upper end, intermediate layer heat shielding 2, internal layer heat shielding 3, lower end, intermediate layer heat shielding 4 and end cap 5, outer heat shielding 1 lower end links to each other with heat shielding 4 lower ends, lower end, intermediate layer, heat shielding 4 upper ends, lower end, intermediate layer link to each other with heat shielding 2 lower ends, upper end, intermediate layer, upper end, intermediate layer heat shielding 2 links to each other with internal layer heat shielding 3 upper ends, and end cap 5 is connected with the lower end of lower end, intermediate layer heat shielding 4.
In this enforcement, described outer heat shielding 1, upper end, intermediate layer heat shielding 2, lower end, intermediate layer heat shielding 4 are connected connected mode for connecting from beginning to end with the internal layer heat shielding.Described outer heat shielding 1 is the thin wall circular structure, and outer heat shielding 1 two ends are provided with symmetrical groove shape structure, and thickness is 0.15-0.35mm; Heat-shield material is kovar alloy; For guaranteeing that structural strength adopts the sheet material rotary pressing processing to form.
In addition, the cirque structure that is welded for fine sheet of internal layer heat shielding 3; For guaranteeing structural strength, adopt highly polished thin slice, utilize anchor clamps spot welding, be welded into cirque structure.Be the heat conduction and the increase heat insulation effect that reduce material, sheet thickness is at 0.015-0.03mm.
The ledge structure that upper end, the intermediate layer heat shielding 2 of present embodiment changes for taper, and be groove shape structure on it, the lower end is planar structure, upper and lower side thickness is identical, and be provided with two row's translots from top to bottom on heat shielding 2 outer walls of intermediate layer upper end, four of every rows, the setting of staggering of two row's translot upper-lower positions; For guaranteeing that the whole sheet material spinning that adopts of structural strength heat shielding forms.
Lower end, described intermediate layer heat shielding 4 is the saltant ledge structure, and the upper end is groove shape structure, and bottom thin is compared on heat shielding 4 tops, lower end, intermediate layer; For guaranteeing that the whole sheet material spinning that adopts of structural strength heat shielding forms.
The bowl structure of described end cap 5 for adopting sheet material spinning to form.
The filamentray structure of this embodiment negative electrode rear end passes end cover structure and draws, and is fixed on the end cap.The heat shielding of this structure is applied in the 5mm negative electrode of certain X-band travelling wave tube, and the filament power consumption is when 9W, and the negative electrode working temperature reaches the temperature more than 1050 ℃, and the temperature of shell is 30 ℃ simultaneously.
The utility model adopts the heat shielding of said structure to increase sandwich construction, has reduced the radiation of heat, and the end to end structure of multilayer has increased the heat conduction distance simultaneously, all can improve the heat insulation effect of negative electrode.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. a multiple field is incubated the heat shielding structure, it is characterized in that, it comprises outer heat shielding (1), upper end, intermediate layer heat shielding (2), internal layer heat shielding (3), lower end, intermediate layer heat shielding (4) and end cap (5), outer heat shielding (1) lower end links to each other with lower end, intermediate layer heat shielding (4) lower end, lower end, intermediate layer heat shielding (4) upper end links to each other with heat shielding (2) lower end, upper end, intermediate layer, intermediate layer upper end heat shielding (2) links to each other with internal layer heat shielding (3) upper end, and end cap (5) is connected with the lower end of lower end, intermediate layer heat shielding (4).
2. a kind of multiple field according to claim 1 is incubated the heat shielding structure, it is characterized in that described outer heat shielding (1), intermediate layer upper end heat shielding (2), lower end, intermediate layer heat shielding (4) are connected 3 with the internal layer heat shielding) connected mode is the head and the tail connection.
3. a kind of multiple field according to claim 1 is incubated the heat shielding structure, it is characterized in that, described outer heat shielding (1) is the thin wall circular structure, and outer heat shielding (1) two ends are provided with symmetrical groove shape structure, and the thickness of described groove shape structure is 0.15-0.35mm.
4. a kind of multiple field insulation heat shielding structure according to claim 1 is characterized in that, the cirque structure that described internal layer heat shielding (3) is welded for fine sheet, and the thickness of described internal layer heat shielding (3) is 0.015-0.03mm.
5. a kind of multiple field according to claim 1 is incubated the heat shielding structure, it is characterized in that, the ledge structure that described intermediate layer upper end heat shielding (2) changes for taper, and the upper end of described intermediate layer upper end heat shielding (2) is groove shape structure, its lower end is planar structure, and upper and lower side thickness is identical, and is provided with two row's translots from top to bottom on heat shielding (2) outer wall of upper end, intermediate layer, four of every rows, the setting of staggering of two row's translot upper-lower positions.
6. a kind of multiple field insulation heat shielding structure according to claim 1 is characterized in that lower end, described intermediate layer heat shielding (4) is the saltant ledge structure, and the upper end is groove shape structure, and bottom thin is compared on lower end, intermediate layer heat shielding (4) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469966 CN202888114U (en) | 2012-09-14 | 2012-09-14 | Multilayer insulating heat shield structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469966 CN202888114U (en) | 2012-09-14 | 2012-09-14 | Multilayer insulating heat shield structure |
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| Publication Number | Publication Date |
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| CN202888114U true CN202888114U (en) | 2013-04-17 |
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| CN 201220469966 Expired - Fee Related CN202888114U (en) | 2012-09-14 | 2012-09-14 | Multilayer insulating heat shield structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996588A (en) * | 2014-06-09 | 2014-08-20 | 成都国光电气股份有限公司 | Electronic gun of traveling-wave tube |
| CN108444150A (en) * | 2018-05-07 | 2018-08-24 | 中国科学院理化技术研究所 | A kind of compound hollow out protective shield of radiation |
| CN110931328A (en) * | 2019-12-06 | 2020-03-27 | 中国电子科技集团公司第十二研究所 | Cathode heater assembly |
| CN112542369A (en) * | 2020-12-09 | 2021-03-23 | 成都国光电气股份有限公司 | Slotted heat shield structure for quick start cathode and assembly method thereof |
-
2012
- 2012-09-14 CN CN 201220469966 patent/CN202888114U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996588A (en) * | 2014-06-09 | 2014-08-20 | 成都国光电气股份有限公司 | Electronic gun of traveling-wave tube |
| CN103996588B (en) * | 2014-06-09 | 2016-04-13 | 成都国光电气股份有限公司 | The electron gun of travelling wave tube |
| CN108444150A (en) * | 2018-05-07 | 2018-08-24 | 中国科学院理化技术研究所 | A kind of compound hollow out protective shield of radiation |
| CN110931328A (en) * | 2019-12-06 | 2020-03-27 | 中国电子科技集团公司第十二研究所 | Cathode heater assembly |
| CN110931328B (en) * | 2019-12-06 | 2022-04-19 | 中国电子科技集团公司第十二研究所 | Cathode heater assembly |
| CN112542369A (en) * | 2020-12-09 | 2021-03-23 | 成都国光电气股份有限公司 | Slotted heat shield structure for quick start cathode and assembly method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130417 Termination date: 20190914 |