JPH03216933A - Assembly method for traveling-wave tube - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for assembling a traveling wave tube, and more particularly to a method for assembling a slow wave tube.

(Prior Art) Conventionally, the slow-wave path of a cavity-coupled traveling wave tube is constructed as shown in FIG.
) A plurality of cavity walls 3 are formed into a ring shape with a cylindrical ferrule 1 protruding from the center thereof and slots 2 are bored therein so that the centers of the slots 2 are alternately positioned at 180''. Then, they are inserted into the cylindrical envelope 4 and stacked.

(Problem to be Solved by the Invention) In the method for assembling a slow-wave circuit as described above, since the degree of freedom of rotation around the axis of each cavity wall 3 remains, the respective slots 2 are arranged alternately. It is difficult to accurately position the 180'' position.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for assembling a traveling wave tube in which an array of resonant cavities can be assembled into a container while alternately positioning each slot at an accurate 180'' position.

[Composition of the invention] (Means for solving the problem) The present invention provides a method in which a recess or a convex portion is provided in advance in the axial direction on the outer circumferential surface of a cavity wall, and a convex or recess corresponding to the recess or convex portion is provided in advance. It is provided on the inner peripheral surface of the cylindrical envelope, and the respective concave portions (convex portions) are directly fitted to the convex portions (concave portions), or the respective concave portions are fitted to a support rod to form an n-shaped envelope. This is a method of assembling a traveling wave tube by inserting and stacking multiple cavity walls inside the tube.

(Operation) According to the present invention, the slot centers of adjacent cavity walls can be positioned and assembled at a position of about 180''.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

The method of assembling a slow wave circuit according to the present invention is shown in FIGS.
It is constructed as shown in b) and (c), and the same parts as in the conventional example (FIGS. 5 and 6) are given the same reference numerals.

That is, 3 is a cavity wall, and this cavity wall 3 has an a-bottom cylindrical shape, and a cylindrical ferrule 1 is provided protruding from both sides at the center of the cavity partition wall, and a slot 2 is bored therein. . As shown in FIG. 2, recesses 5 are formed on the outer circumferential surface of the cavity wall 3 at a position that bisects the slot angle θ and at a position 180'' away from that position.

On the other hand, as shown in FIG. 1(b), the inner peripheral surface of the cylindrical envelope 4 to which a plurality of cavity walls 3 are fixed has recesses 5 of the cavity walls 3.
A pair of recesses 6 are provided at an interval of 180' in correspondence with each other.

Further, as shown in FIG. 3(c), a flange 3a is provided protruding from the cavity wall 3 located at the end of the slow wave circuit, and a pair of flange 3a are provided on the flange 3a at positions corresponding to the respective recesses 5 and 6. Support rod 7
has been planted.

When assembling, the cylindrical envelope 4 and the pair of support rods 7 are assembled while fitting the recesses 6 of the cylindrical envelope 4 into the pair of support rods 7.
Then, the plurality of cavity walls 3 shown in FIG. 3(a) are inserted into the cylindrical envelope 4 and stacked while fitting the recesses 5 into the pair of support rods 7. To go. Of course, adjacent cavity walls 3 are stacked such that each slot 2 is in a 180@different position. In this way, the slow wave circuit is completed.

In addition, contrary to the above, multiple cavities! 23 and the hollow wall 3 having the pair of support rods 7 may be assembled first. That is, the pair of support rods 7 are fitted into the recesses 5 on the outer periphery of the cavity wall 3 so that the slots 2 are at 180° different positions.

(Example of Capsular Shape) FIGS. 3(a) and 4(b) and FIGS. 4(a) and (b) show two modified examples of the present invention, in which effects similar to those of the above embodiment can be obtained.

That is, in the above embodiment, the cavity wall 3 having the pair of support rods 7 shown in FIG. 1(C) was used, but in FIGS.
) and FIGS. 4(a) and 4(b), the plurality of cavity walls 3 and the cylindrical envelope 4 are directly connected without using the cavity wall 3 that holds the pair of support rods 7. It's a combination.

That is, in the case of FIGS. 3<a> and 3(b), a pair of recesses 5 are provided in advance at mutually opposite positions on the outer peripheral surface of the cavity wall 3, and a pair of protrusions 8 corresponding to the recesses 5 are formed in the cylinder. It is provided on the inner peripheral surface of the shaped envelope 4, and the respective concave portions 5 and convex portions 8 are fitted into each other. Note that the cavity wall 3 in FIG. 3(a) has exactly the same structure as the cavity wall 3 in FIG. 1(a) in the above embodiment.

In the case of FIGS. 4(a) and 4(b), a pair of convex portions 9 are provided in advance at predetermined positions on the outer periphery of the cavity wall 3, and a pair of concave portions 10 corresponding to the convex portions 9 are formed into a cylindrical shape. It is provided in the envelope 4, and the respective convex portions 9 and concave portions 10 are fitted.

The cylindrical envelope 4 in FIG. 4(b) has exactly the same structure as the cylindrical envelope 4 in FIG. 1(b) in the above embodiment.

Furthermore, the recessed portion and the convex portion may be provided at three or more symmetrical positions.

[Effects of the Invention] According to the present invention, by simply processing the outer peripheral surface of the cavity wall and the inner peripheral surface of the cylindrical envelope, the slots of adjacent cavity walls can be alternately and accurately aligned. So that it comes to the 180' position,
Easy to assemble.

[Brief explanation of drawings]

1(a), 1(b), and 1(c) are perspective views showing a method of assembling a cavity-coupled traveling wave tube according to an embodiment of the present invention;
The figure is a plan view showing the cavity wall used in this invention, and Figure 3 (
a), (b) are perspective views showing a variation example of this invention, FIGS. 4(a), (b) are perspective views showing another modification example of this invention,
Fig. 5 is a cross-sectional view showing a slow wave circuit of a general cavity-coupled traveling wave tube, and Figs. 6 (a) and (b) constitute a slow-wave circuit of a conventional cavity-coupled traveling wave tube. FIG. 3 is a perspective view showing a cavity wall and a cylindrical envelope. DESCRIPTION OF SYMBOLS 1... Ferrule, 2... Slot, 3... Cavity wall, 4... Cylindrical envelope, 5, 6, 10... Recessed part, 7
...Support rod, 8, 9...Protrusion.

Claims (1)

[Claims] A plurality of cavity walls each having a ferrule protruding from the center and having slots formed therein are arranged in a cylindrical envelope such that the centers of the slots are alternately located at approximately 180 degrees. In the method of assembling a traveling wave tube in which a slow-wave circuit is formed by stacking the tubes, a concave portion or a convex portion is provided in advance in the axial direction on the outer peripheral surface of the cavity wall, and a convex portion or a concave portion corresponding to the concave portion or convex portion is It is provided on the inner circumferential surface of the cylindrical envelope, and the concave portions (concave portions) are directly fitted into each other, or the concave portions are fitted to a support rod and the convex portions (concave portions) are fitted into each other. A method for assembling a traveling wave tube, comprising inserting and stacking the plurality of cavity walls described above.