Spherical cap chord height measuring method and device

Abstract

The invention relates to a spherical crown chordal height measuring method, belonging to the field of vacuum electron devices. The method is carried out according to the following steps: (a) a spherical-crown-shaped component to be measured is arranged on a clamp press block of a special device; (b) the clamp press block is arranged on a base component of the special device; (c) the clamp press block is connected with the base component by an ammeter; (d) the clamp press block and the base component are closely moved close to each other so that the clearance between the clamp press block and the base component is decreased, and the movement is stopped the moment the ammeter indicates a value; and (e) a clearance value on the press block is read. The device in use consists of two parts, i.e. the clamp press block and the base component; and the measuring method prevents a measuring device to be directly contacted with the spherical-crown-shaped component, so no deformation of the component is caused and requirements of an electron gun are satisfied.

Description

technical field [0001] The invention belongs to the field of vacuum electronic devices, in particular to a measuring method and measuring device for spherical crown chord height. Background technique [0002] In the design of high-power vacuum microwave devices, regarding the use of grid-controlled electron guns, the grid used is a spherical crown-shaped part. It is the same as the grid control principle used in ordinary triodes. In the axisymmetric convergent gun, an electrode closer to the cathode than the anode is used or set to control the cathode emission current, so as to achieve the purpose of controlling large injection current with low power. Especially in the case of pulse work, since the working voltage of the grid is much lower than that of the anode, and it does not intercept or only intercepts a small part of the current, this greatly reduces the power of the pulse modulator. Yangkong has higher efficiency, and also avoids the difficulty of making high-voltage...

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is that, in the measurement method of ordinary tools in the past, the grid parts of the grid structure are easily damaged and deformed, which affects the parameters of the whole tube. In order to overcome this deficiency, how to accurately measure the grid The chord of the polar sphere is high, and to ensure that the grid structure does not deform during the measurement process, it is necessary to redesign the special measurement device and measurement method

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