CN203277309U - Electron gun assembly structure for onboard travelling wave tube - Google Patents
Electron gun assembly structure for onboard travelling wave tube Download PDFInfo
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- CN203277309U CN203277309U CN 201320101153 CN201320101153U CN203277309U CN 203277309 U CN203277309 U CN 203277309U CN 201320101153 CN201320101153 CN 201320101153 CN 201320101153 U CN201320101153 U CN 201320101153U CN 203277309 U CN203277309 U CN 203277309U
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- electron gun
- heat shield
- heat shielding
- gun assembly
- cathode
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Abstract
The utility model provides an electron gun assembly structure for onboard travelling wave tube (TWT), and belongs to the field of vacuum microwave electronic devices. The electron gun assembly structure includes a cathode heater assembly, an inner heat shield tube and an outer heat shield tube, wherein the heat shield tube uses a straight tube nested structure, the side of the outer heat shield tube is provided with a heat shield welded ring, and the lower part of the outer heat shield tube is provided with a heat shield tube transition piece for facilitating centering. The improved electron gun assembly is easy to operate during assembling, welding of support parts is completed before preparing the cathode, long-time exposure of the cathode to the atmosphere in the process of electron gun assembly is prevented, and a braze welding structure is used to improve the vibration resistance of the cathode assembly.
Description
Technical field
The utility model belongs to the vacuum microwave field of electronic devices, specially refers to a kind of electron gun structure structure for air-borne TWT.
Background technology
In the prior art, the negative electrode majority for travelling wave tube is hot cathode.Electron gun is take negative electrode as core, comprise negative electrode as electron source, be used for negative electrode be heated to working temperature heater, be used for the fixed negative pole heater assembly supporting construction, be used for keeping insulation and the screening arrangement of negative electrode working temperature.When electron gun structure designs, mainly consider three aspects: the mechanical strength problem of the feasibility of assembling and convenience problem, structure and reduction heater power dissipation concerns.The target performances such as the moisture in atmosphere, oxygen and dust all can have damage, and when therefore assembling, electron gun core body installation convenience is stronger, and the time that negative electrode exposes in air is shorter, and anticathode damage is just less.Electron gun is the core component of travelling wave tube, therefore when the electron gun core designs, need to fully take into account firm degree, the resistance to shock of structure, and particularly this problem seems particularly outstanding in air-borne TWT.During travelling wave tube work, the cathode surface temperature generally all will reach more than 1000 ℃.Keep negative electrode so working under high-temperature, just need backing material to have stronger high-temperature machinery intensity, supporting construction and have insulation and shielding character preferably.
In traditional electron gun structure structure, the negative electrode development departments first prepares Heater-Cathode assembly complete, when assembling, electron gun structure again Heater-Cathode assembly and support part are adopted the spot-welding technology welding, this Standard complex process, negative electrode need to be exposed in atmosphere for a long time, and the bonding area between each part is little, resistance to shock is poor.For the complexity that reduces electron gun core component assembling, reduce the open-assembly time of negative electrode in atmosphere, improve the resistance to shock of travelling wave tube, just need to carry out the change of novelty on the original structure basis.
Summary of the invention
The utility model technical issues that need to address are, have long, the defective such as resistance to shock is poor of assembly technology complexity, negative electrode open-assembly time in atmosphere for existing electron gun structure, in order to overcome these defectives, just need to redesign out that assembly technology is simple, the structure of negative electrode open-assembly time a kind of innovation that short, vibration resistance is strong as far as possible in atmosphere.
The purpose of this utility model is to provide a kind of travelling wave tube electron gun structure structure that is applicable to airborne environment for use.
In order to realize the purpose of this utility model, the technical scheme that adopts is as follows, a kind of electron gun structure structure for air-borne TWT, comprise Heater-Cathode assembly, inside and outside heat shielding cylinder, it is characterized in that, the heat shielding cylinder adopts the straight tube nested structure, and outer heat shielding cylinder sidepiece is provided with the heat shielding welding ring, and the bottom is provided with outer heat shielding cylinder and the heat shielding cylinder transition piece of being convenient to centering.
The utility model structure is the straight tube nested structure, is from top to bottom Heater-Cathode assembly, internal heat shield cylinder, heat shielding welding ring, outer heat shielding cylinder and heat shielding cylinder transition piece successively in figure.The straight tube structure is easy to process, can guarantee good centering.Inside and outside heat shielding cylinder all adopts the molybdenum rhenium alloys in the utility model structure.This kind material also has stronger welding performance when having excellent high-temperature machinery intensity, soldering is all adopted in the welding between each part.And in traditional structure, as shown in Figure 1, be oblique cylinder nested structure, be from top to bottom Heater-Cathode assembly, internal heat shield cylinder, outer heat shielding cylinder and outer heat shielding cylinder welding ring successively in figure.Oblique barrel structure processed complex, centering are difficult to guarantee.The material that in traditional structure, the internal heat shield cylinder adopts is tantalum.The tensile strength of tantalum in the time of 1200 ℃ only has 22N/mm
2, and the tensile strength of molybdenum rhenium alloys in the time of 1200 ℃ is 128N/mm
2So after using molybdenum rhenium alloys material, the internal heat shield part can be processed thinner longlyer, can effectively reduce the heater power loss.
The beneficial effects of the utility model are, improved electron gun structure structure is easy to operate during assembling, support part be welded on the negative electrode preparation before complete, avoided that in the electron gun assembling process, negative electrode is exposed in atmosphere for a long time; Adopt the Welding structure, improved the vibration resistance of cathode assembly; The heat shielding effect of this structure is improved, and has under equal conditions reduced the heater power loss, has promoted the negative electrode heat-insulating property.
Description of drawings
Fig. 1 is conditional electronic rifle modular construction schematic diagram;
Fig. 2 is the utility model electron gun structure structural representation.
Embodiment
With reference to Fig. 1, represent traditional travelling wave tube electron gun structure structure, Fig. 2 represents electron gun structure structure of the present utility model, what be placed in the top in figure is Heater-Cathode assembly 1, it is internal heat shield cylinder 2 under it, outer heat shielding cylinder 4 is connected with heat shielding welding ring 3 on outer heat shielding cylinder, and outer heat shielding cylinder bottom is heat shielding cylinder transition piece 5.In traditional structure, heat shielding adopts tiltedly cylinder nested structure.In the utility model structure, heat shielding adopts the straight tube nested structure, and internal heat shield cylinder and outer heat shielding cylinder all adopt molybdenum rhenium alloys material, and the welding manner between each part is all soldering, and soldering is completed before the negative electrode preparation.
Claims (2)
1. an electron gun structure structure that is used for air-borne TWT, comprise Heater-Cathode assembly, inside and outside heat shielding cylinder, it is characterized in that, the heat shielding cylinder adopts the straight tube nested structure, and outer heat shielding cylinder sidepiece is provided with the heat shielding welding ring, and the bottom is provided with the heat shielding cylinder transition piece of being convenient to centering.
2. a kind of electron gun structure structure for air-borne TWT according to claim 1, is characterized in that, described inside and outside heat shielding cylinder all adopts the molybdenum rhenium alloys, and soldering is all adopted in the welding between each part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101153 CN203277309U (en) | 2013-03-06 | 2013-03-06 | Electron gun assembly structure for onboard travelling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101153 CN203277309U (en) | 2013-03-06 | 2013-03-06 | Electron gun assembly structure for onboard travelling wave tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203277309U true CN203277309U (en) | 2013-11-06 |
Family
ID=49507665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320101153 Expired - Lifetime CN203277309U (en) | 2013-03-06 | 2013-03-06 | Electron gun assembly structure for onboard travelling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203277309U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275169A (en) * | 2017-06-15 | 2017-10-20 | 湖北汉光科技股份有限公司 | High-power klystron cathode for electron gun heater sub-assembly and welding method |
| 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 |
-
2013
- 2013-03-06 CN CN 201320101153 patent/CN203277309U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275169A (en) * | 2017-06-15 | 2017-10-20 | 湖北汉光科技股份有限公司 | High-power klystron cathode for electron gun heater sub-assembly and welding method |
| CN107275169B (en) * | 2017-06-15 | 2023-04-11 | 湖北汉光科技股份有限公司 | Cathode heater assembly for high-power klystron electron gun and welding method |
| 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |