Electrochemical polishing method for spiral line of travelling wave tube
An electrochemical and helix technology, which is applied in the field of electrochemical polishing of the helix of the traveling wave tube, can solve the problems of poor surface finish inside the helix, increased microwave loss, and influence on microwave transmission, etc.
Active Publication Date: 2015-07-08
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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Problems solved by technology
Due to heat treatment, mechanical treatment and chemical treatment, the smoothness of the inner surface of the helix becomes worse, which affects the high-precision slow-wave assembly and the microwave transmission during the working of the traveling wave tube when making the whole tube, which increases the microwave loss and reduces the High Frequency Interaction Efficiency
Method used
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Embodiment Construction
[0020] Depend on Figure 1-2 It can be seen from the structure shown that the electrochemical polishing method for the helical wire of the traveling wave tube includes:
[0021] 1) Preparation of electrochemical polishing solution: Pour the weighed phosphoric acid and sulfuric acid into the working tank 1 that has been put into water and stir continuously, and weigh the phosphoric acid, sulfuric acid and water according to the ratio of 8:3:3;
[0022] 2) Pre-treatment of the electrochemical solution: First, the fixture is used to simulate the helix 3 for testing. The material of the fixture is the same as the helix, and the length and outer diameter are similar to the helix. It is a solid and slender structure. The fixture is connected to the metal rod 4. The metal rod 4 is connected to the anode of the power supply, and the two sides of the fixture are provided with a metal plate 2 connected to the cathode of the power supply. Both the fixture and the metal plate 2 are placed...
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The invention discloses an electrochemical polishing method for a spiral line of a travelling wave tube. The electrochemical polishing method comprises the following steps of: 1) preparing electrochemical polishing solution; 2) carrying out front-stage treatment on the electrochemical polishing solution; 3) carrying out electrochemical polishing on the spiral line; and 4) cleaning and drying the spiral line after electrochemical polishing. The electrochemical polishing method disclosed by the invention has the advantages that the electrochemical polishing treatment process is finished in certain time according to certain current, the polishing treatment of the spiral line is finished; by adoption of the electrochemical polishing, the size of the outer-diameter direction of the spiral line also can be reduced, and the spiral line with the bright surface is finally formed, so that the finish is improved, the high-frequency loss of the spiral line in use is reduced; when the process is applied in a slow-wave system of the X-band 70W spiral line travelling wave tube, the output power is increased by 30%.
Description
technical field [0001] The invention relates to the field of manufacturing the helix of a slow wave component of a traveling wave tube in a vacuum device, in particular to an electrochemical polishing method for the helix of a traveling wave tube. Background technique [0002] In the microwave field, the traveling wave tube is the best device that combines bandwidth and gain. Among them, the helical traveling wave tube is the most widely used, and its high-frequency circuit is generally a helical metal wire or metal strip, which consists of three or More dielectric rods are clamped and secured within the metal tubular casing. The basic role of the helical wire is to provide a high-frequency electromagnetic wave with an axial propagation speed close to the electron motion speed and a sufficiently strong axial electric field, so that the electromagnetic wave interacts with the electron beam to amplify the signal. The metal wire is called a helix, which is the carrier of high-...
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IPC IPC(8): C25F3/26C25F3/16
Inventor 吴华夏张文丙白卫星刘志意朱刚张丽郑何华董晨
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE