Cathode assembly of magnetron, manufacturing method thereof, and magnetron

A cathode assembly and manufacturing method technology, applied in the field of magnetron, can solve the problems of low filament positioning accuracy and poor consistency of loop resistance, etc., and achieve the effects of ensuring high quality, improving work performance, and facilitating movement and welding

Active Publication Date: 2020-09-15
GUANGDONG WITOL VACUUM ELECTRONICS MFR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low filament positioning accuracy or poor consistency of loop resistance in the prior art, and provide a cathode assembly of a magnetron, which can improve positioning accuracy and loop resistance consistency

Method used

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  • Cathode assembly of magnetron, manufacturing method thereof, and magnetron
  • Cathode assembly of magnetron, manufacturing method thereof, and magnetron
  • Cathode assembly of magnetron, manufacturing method thereof, and magnetron

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Embodiment Construction

[0047] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0048] In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself.

[0049] figure 1 It is a cathode assembly of a magnetron in the prior art, because the filament 1 is connected with the upper solder ring 31 ′ installed on the upper molybdenum cap 21 ′ of the prior art and the lower molybdenum cap 22 ′ of the prior art The lower solder ring 32' is in contact with the height direction of the filament 1, so that after the upp...

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Abstract

The invention relates to the technical field of magnetrons, and discloses a cathode assembly of a magnetron, a manufacturing method thereof and the magnetron. The cathode assembly of the magnetron comprises a spiral filament and a molybdenum bracket. The molybdenum bracket comprises an upper molybdenum cap and a lower molybdenum cap, wherein the upper molybdenum cap and the lower molybdenum cap are welded with two ends of the filament through welding fluxes respectively. The upper molybdenum cap and the lower molybdenum cap are provided with welding flux grooves. The welding fluxes are formedinto welding flux blocks before welding, can be snap-fitted in the welding flux grooves, and radially contact the filament. The welding flux blocks are prevented from sliding down from the welding flux grooves, and are convenient for movement and welding. The welding flux blocks radially contact the filament before welding, so that the relative position of the filament to the upper molybdenum capand the lower molybdenum cap is not affected after welding flux blocks are melted. The filament is prevented from eccentricity caused by misalignment, tilting or lowering. The positioning and installation accuracy of the filament is high. Due to the fact that the flow of the welding fluxes in the radial direction is blocked, the length of a weld joint is basically the same, and the effectiveness and high quality of the welding are ensured. The resistance consistency of a closed loop is great, which significantly improves the work performance.

Description

technical field [0001] The invention relates to the technical field of magnetrons, in particular to a cathode assembly of a magnetron, a manufacturing method thereof, and a magnetron. Background technique [0002] Magnetrons are vacuum electron tubes that generate microwaves. The cathode assembly composed of spiral thoriated tungsten cathode and molybdenum support in the magnetron is the electron source to maintain the magnetron to generate electrons and maintain the continuous oscillation of electrons. Both thoriated tungsten alloy and molybdenum are refractory metals with melting points exceeding 2600°C, and when the magnetron is working normally, the maximum temperature of the thoriated tungsten cathode exceeds 1800°C. Therefore, it is necessary to select a suitable high-temperature solder to ensure good welding between the thoriated tungsten alloy wire and the molybdenum support to form a closed loop, and to ensure that the spiral thoriated tungsten cathode emits therma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/05H01J9/18H01J9/04
CPCH01J9/04H01J9/18H01J23/05
Inventor 葛春桥刘志勇王贤友
Owner GUANGDONG WITOL VACUUM ELECTRONICS MFR
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