Cathode-heater assembly for high-power klystron electron gun and welding method
A welding method and klystron technology are applied in the manufacture of electrode assemblies, cathodes of transit time electron tubes, etc., which can solve the problems of poor shielding effect and poor firmness, achieve good heat shielding effect, reduce cathode heating power, structure Compact and robust effect
Active Publication Date: 2017-10-20
湖北汉光科技股份有限公司
View PDF7 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The thermal subassembly and the cathode are manufactured separately, and then assembled by resistance welding, the shielding effect is poor, and the firmness is also poor
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0042] In this embodiment, the welding method of the cathode heater assembly for the high-power klystron electron gun comprises the following steps:
[0043] 1) Prepare cathode and heater preforms separately:
[0044] The outer edge of the cathode 110 is provided with a circle of inner slots 111 and a circle of outer slots 112, such as figure 1 shown;
[0045] The thermal sub-preform 140 is a helical thermal sub-preform that is wound bidirectionally by a thermal sub-base, and the two free ends of the thermal sub-preform 140 are arranged side by side up and down to form an upper free end 142 and a lower free end 143, while the upper free end End 142 and lower free end 143 are straight line segments and arranged in parallel, as image 3 As shown, the center distance between the upper free end 142 and the lower free end 143 is equal t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a welding method of a cathode-heater assembly for a high-power klystron electron gun, which is characterized in that an internal heat shield sleeve is brazed to a cathode by using a high-temperature welding flux, then a well wound heater is fixed in the internal heat shield sleeve at the bottom surface of the cathode by using pasty aluminum oxide, then an upper bottom heat shield, an external heat shield sleeve and a connecting base plate are assembled, finally a cathode-heater assembly is brazed in a high-temperature hydrogen furnace by using the high-temperature welding flux, the pasty aluminum oxide is sintered into solid aluminum oxide porcelain in high-temperature welding so as to enable the heater to be firmly fixed, and the insulation between the heater and the cathode, the upper bottom heat shield, the internal heat shield sleeve and the external heat shield sleeve is good in the formed cathode-heater assembly. The cathode-heater assembly prepared according to the welding method is compact and film in structure and resists vibration and impact. In addition, the cathode-heater assembly is good in heat shielding effect and reduces the heating power of the cathode.
Description
technical field [0001] The invention relates to the field of ultra-high frequency vacuum electronic devices, in particular to a cathode heater assembly for a high-power klystron electron gun and a welding method. Background technique [0002] At present, the cathode in the ultra-high frequency vacuum electronic device is manufactured separately as a cathode component, and then the heater for heating the cathode, the heat shield part, and the insulating porcelain supporting the heater are assembled into a cathode heater assembly by resistance welding. Such a cathode heating subassembly has poor thermal shielding effect and poor firmness, and cannot withstand strong vibrations. [0003] Such as the Chinese invention patent application (publication number 103681177, publication date 2014.3.26) discloses a kind of S-band 12.1% bandwidth klystron, wherein the electron gun assembly includes the electron gun chassis assembly; the electron gun transition section; the electron gun in...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/18H01J23/04
CPCH01J9/18H01J23/04
Inventor 陈龙星李艳红
Owner 湖北汉光科技股份有限公司