CN203674152U - Structure of grid controlled electronic gun - Google Patents
Structure of grid controlled electronic gun Download PDFInfo
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- CN203674152U CN203674152U CN201320847881.1U CN201320847881U CN203674152U CN 203674152 U CN203674152 U CN 203674152U CN 201320847881 U CN201320847881 U CN 201320847881U CN 203674152 U CN203674152 U CN 203674152U
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- shadow grid
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Abstract
The utility model discloses a structure of a grid controlled electronic gun, which comprises an insulating heat shield, a shadow grid mesh, a shadow grid bracket, a control grid assembly and a supporting cylinder, wherein the shadow grid mesh is fixed on the shadow grid bracket, a planar portion of the shadow grid mesh is of a hollow structure, the shadow grid bracket is arranged outside a cathode, the insulating heat shield is fixed at the top part of a supporting heat shield of the cathode, the control grid assembly is fixed on the supporting cylinder, and the supporting cylinder is arranged outside the shadow grid bracket in a sleeved mode. The structure of the grid controlled electronic gun can effectively solve a problem of insufficient cathode emission temperature caused by heat conduction for a head portion of the cathode by the shadow grid mesh. Problems of grid controlled electronic gun current variations and control grid electron interception can be effectively solved by using the structure of the grid controlled electronic gun.
Description
Technical field
The utility model relates to a kind of travelling wave tube electron gun, in particular a kind of structure of grided electron gun.
Background technology
Electron gun, as the structure of electron emission note, is the important component part of travelling wave tube.The electron gun of gate modulation structure is widely adopted with the advantage of its low control voltage.Grided electron gun is made up of negative electrode, shadow grid, control gate etc.In grided electron gun, negative electrode curved surface, shadow grid curved surface, control gate curved surface are homocentric sphere, and the sphere of this homocentric sphere is consistent with near the equipotential surface shape controlling extremely, thereby guarantee the focusing requirement of the electron beam of cathode emission.Shade aperture plate and control gate aperture plate are spoke structure, and the grid silk of shadow grid is wider than control gate grid silk, can effectively block control gate.The grid silk of shadow grid and the alignment of the grid silk of control gate when assembling, when work, control gate is intercepted and captured electric current hardly.
In grided electron gun, using more is the structure shown in Fig. 1 and Fig. 2.It is upper that the shadow grid 2 ' of this structure is fixed on negative electrode 3 ', forms an entirety with negative electrode 3 ', can prevent the 3 ' heat conduction of aperture plate target.But in the time that electron gun is worked, due to the high-temperature baking (negative electrode 3 ' working temperature is 1050 ℃) of negative electrode 3 ', shadow grid 2 ' can produce along with the heating of negative electrode 3 ' thermal deformation, and distortion meeting occurs at axial and circumferencial direction simultaneously.Axial distortion can make the distance between aperture plate change, thus affect electron gun control voltage, emission current and electron beam converge performance; The distortion of circumferencial direction can make shadow grid 2 ' and the grid silk of control gate 1 ' misplace, and causes control gate 1 ' to produce and intercepts and captures electric current, intercepts and captures electric current and makes control gate 1 ' produce secondary, thereby affect electron stream passband and the service behaviour of travelling wave tube.Therefore curent change and control gate 1 ' the traps electrons problem brought in order to solve the electron gun of this kind of structure, need a kind of new grided electron gun structure of design.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of structure of grided electron gun is provided, and solves curent change and the control gate traps electrons problem of original grided electron gun.
The utility model is achieved through the following technical solutions, and the utility model comprises insulation heat shielding, shade aperture plate, shadow grid support, control gate assembly, support tube; Described shade aperture plate is fixed on shadow grid support, the planar section of shade aperture plate is engraved structure, shadow grid support is arranged at the top that negative electrode is outer, insulation heat shielding is fixed on the support heat shielding of negative electrode, and control gate assembly is fixed on support tube, and support tube is set in outside shadow grid support.
The engraved structure of described shade aperture plate, reduces the heat-conducting area of shade aperture plate greatly, thereby has reduced the heat conduction of aperture plate target head.
Described insulation heat shielding is the tantalum piece of 0.02mm thickness.Strengthen the insulation of cathode taps position, reduce the loss of negative electrode head heat, improve the temperature of negative electrode head.
The bottom of described support tube is provided with radome, and described radome is positioned at the bottom of negative electrode.The reflect heat at negative electrode radiation direction rear portion is returned, increase the temperature of negative electrode.
Causing the curent change of grided electron gun and the main cause of control gate traps electrons is that shadow grid has occurred axially and the distortion of circumferencial direction, and the reason that causes this distortion to be shadow grid and negative electrode be fixed together, thereby negative electrode produces axially in the time of the hot operation of 1050 ℃ and the distortion of the distortion of circumferencial direction drive shadow grid.So the key of dealing with problems is the fixed form that changes shadow grid, and shadow grid is fixed on shadow grid support, and shadow grid is not out of shape with the distortion of negative electrode.Relative position between shadow grid and control gate is fixed like this, can not be subject to the impact of negative electrode thermal expansion distortion.Shadow grid sphere and the negative electrode sphere of this structure are to link together, and not only can resist the axial deformation of negative electrode adstante febre, and the circumferencial direction of negative electrode distortion do not affect shadow grid, thereby guarantee the realization of design size.
The utility model has the following advantages compared to existing technology: the utility model can effectively solve the inadequate problem of cathode emission temperature that the heat conduction of shadow grid net target head causes.Use this grided electron gun structure can effectively solve grided electron gun curent change and control gate traps electrons problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing electron gun;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is structural representation of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under take technical solutions of the utility model as prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 3, the present embodiment comprises insulation heat shielding 1, shade aperture plate 2, shadow grid support 3, control gate assembly 4, support tube 5; Described shade aperture plate 2 is fixed on shadow grid support 3, shadow grid is fixed on shadow grid support 3, the planar section of shade aperture plate 2 is engraved structure, shadow grid support 3 is arranged at the top that negative electrode is outer, insulation heat shielding 1 is fixed on the support heat shielding of negative electrode, control gate assembly 4 is fixed on support tube 5, and support tube 5 is set in outside shadow grid support 3.
The engraved structure of described shade aperture plate 2, reduces the heat-conducting area of shade aperture plate 2 greatly, thereby has reduced the heat conduction of aperture plate target head.
Described insulation heat shielding 1 is the tantalum piece of 0.02mm thickness.Strengthen the insulation of cathode taps position, reduce the loss of negative electrode head heat, improve the temperature of negative electrode head.
The bottom of described support tube 5 is provided with radome, and described radome is positioned at the bottom of negative electrode.The reflect heat at negative electrode radiation direction rear portion is returned, increase the temperature of negative electrode.
Claims (3)
1. a structure for grided electron gun, is characterized in that, comprises insulation heat shielding (1), shade aperture plate (2), shadow grid support (3), control gate assembly (4), support tube (5); Described shade aperture plate (2) is fixed on shadow grid support (3), the planar section of shade aperture plate (2) is engraved structure, shadow grid support (3) is arranged at the top that negative electrode is outer, insulation heat shielding (1) is fixed on the support heat shielding of negative electrode, control gate assembly (4) is fixed on support tube (5), and support tube (5) is set in outside shadow grid support (3).
2. the structure of grided electron gun according to claim 1, is characterized in that, described insulation heat shielding (1) is the tantalum piece of 0.02mm thickness.
3. the structure of grided electron gun according to claim 1, is characterized in that, the bottom of described support tube (5) is provided with radome, and described radome is positioned at the bottom of negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320847881.1U CN203674152U (en) | 2013-12-18 | 2013-12-18 | Structure of grid controlled electronic gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320847881.1U CN203674152U (en) | 2013-12-18 | 2013-12-18 | Structure of grid controlled electronic gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203674152U true CN203674152U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201320847881.1U Expired - Fee Related CN203674152U (en) | 2013-12-18 | 2013-12-18 | Structure of grid controlled electronic gun |
Country Status (1)
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| CN (1) | CN203674152U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078296A (en) * | 2014-07-02 | 2014-10-01 | 南京三乐电子信息产业集团有限公司 | High-assembly-accuracy grid-control electronic gun |
| CN105977119A (en) * | 2016-07-12 | 2016-09-28 | 电子科技大学 | Method for determining virtual anode position of grid control electron gun |
| CN107275172A (en) * | 2017-06-14 | 2017-10-20 | 安徽华东光电技术研究所 | Transparent observation window and use method thereof |
| CN108648976A (en) * | 2018-06-12 | 2018-10-12 | 电子科技大学 | Based on multiple physical field collaborative simulation determine electron gun aperture plate assembly building away from method |
| CN113921356A (en) * | 2021-10-09 | 2022-01-11 | 中国科学院空天信息创新研究院 | Electron gun assembly method and electron gun |
-
2013
- 2013-12-18 CN CN201320847881.1U patent/CN203674152U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078296A (en) * | 2014-07-02 | 2014-10-01 | 南京三乐电子信息产业集团有限公司 | High-assembly-accuracy grid-control electronic gun |
| CN104078296B (en) * | 2014-07-02 | 2016-09-14 | 南京三乐电子信息产业集团有限公司 | A kind of grided electron gun of high assembly precision |
| CN105977119A (en) * | 2016-07-12 | 2016-09-28 | 电子科技大学 | Method for determining virtual anode position of grid control electron gun |
| CN107275172A (en) * | 2017-06-14 | 2017-10-20 | 安徽华东光电技术研究所 | Transparent observation window and use method thereof |
| CN107275172B (en) * | 2017-06-14 | 2019-01-29 | 安徽华东光电技术研究所 | Transparent observation window and use method thereof |
| CN108648976A (en) * | 2018-06-12 | 2018-10-12 | 电子科技大学 | Based on multiple physical field collaborative simulation determine electron gun aperture plate assembly building away from method |
| CN113921356A (en) * | 2021-10-09 | 2022-01-11 | 中国科学院空天信息创新研究院 | Electron gun assembly method and electron gun |
| CN113921356B (en) * | 2021-10-09 | 2023-09-05 | 中国科学院空天信息创新研究院 | Method for assembling electron gun and electron gun |
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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 |
Granted publication date: 20140625 Termination date: 20211218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |