Inside and outside ring structure of permatron positive electrode

Abstract

The invention relates to a magnetron, in particular to an inner and outer ring structure of the positive electrode of a magnetron which can be installed firmly, save the raw material and generate stable microwaves. The technical proposal of the invention comprises a cylinder-shaped positive electrode outer casing installed around the central filament of the magnetron; a plurality of blades formed on the inner wall of the cylinder-shaped positive electrode outer casing in a radial way; and inner and outer rings welded in the upper and lower grooves of the blades. The invention is characterized in that the cross sections of the inner and outer rings are processed into rectangular areas, so that the inner and outer rings can be tightly contacted with the blades in the upper and lower grooves of the blades, thereby not being easily dropping out after being welded, the phases among the blades are stable, and microwaves generated by the magnetron are stable.

Description

technical field [0001] The invention relates to a magnetron, in particular to an inner and outer ring structure of a positive electrode of a magnetron with tight contact, firm installation, saving raw materials, and capable of generating stable microwaves. Background technique [0002] figure 1 It is a longitudinal sectional view of a magnetron structure in the prior art. As shown in the figure, generally, a magnetron mainly includes: a positive electrode part; a negative electrode part; a magnetic pole part; and a microwave emitting part. The positive electrode part is composed of a barrel-shaped positive electrode shell 11, on the inner wall of the positive electrode shell 11, a plurality of blades 12 are radially formed, and the inner and outer rings are welded in the upper and lower grooves of the blades. [0003] The negative electrode portion includes a spiral-shaped filament 13 formed of W (tungsten) and TH (thorium) elements on the central axis and capable of emitt...

AI Technical Summary

Problems solved by technology

[0010] In order to ensure that the harmonics oscillate in the π mode to generate microwaves with stable frequency, the connection between the inner and outer rings in the positive electrode casing and the blades is very important, because the inner and outer rings are connected to the radially arranged blades in the positive electrode in the form of intervals, so that their potentials are equal. Distributed capacitance is generated between the inner and outer rings to form an L-C resonance circuit, which affects the moving electrons and the circuit during energy exchange. Therefore, the microwave frequency generated in the magnetron can be adjusted and stabilized through the structure and connection of the inner and outer rings. However, In the existing magnetron, the cross-section of the inner and outer rings forms a trapezoid after being processed by a punching machine, so that the inner and outer rings cannot closely match the installation grooves on the blades. After installation, they are not in close contact with the blades, and they are easy to fall off after welding. The microwave oscillation number spreads greatly, and the performance is unstable. In addition, after punching, the inner circle and corner waste are as high as 82%, so it is not conducive to reducing product cost and price.

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