SU1045307A1 - Method of assembling o-type microwave device - Google Patents

Abstract

METHOD FOR ASSEMBLING MICROWAVE O-TYPE, including assembling a spiral-type retarding system with dielectric supports, deforming the balloon, introducing a spiral with dielectric supports into the deformed balloon, and removing mechanical deformation, characterized in that, in order to facilitate the process: assembly and before the introduction of the helix into the balloon, the instrument assemblies quality distort the helix, fix the deformation of the helix and have dielectric supports along the points of the greatest deformation of the helix directed to the “e axis.

Description

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The invention relates to the construction of an electrovacuum device; hog-type lamps taking wave (TWT) and reverse wave lamps (BWO).

A known method of attaching an eamed l to dei systems in a metal balloon, is that the metal balloon, after being introduced into the emergent system, consisting both of the helix or its variety and the dielectric supports, is axially stretched until the retarding system is fully compressed.

The disadvantages of this method are its technological complexity, inapplicability to high-strength shells and the possibility of breakdown of the dielectric supporting supports during assembly.

The closest in technical essence to the invention is a method of assembling an O-type microwave device, including assembling a spiral-type retardant sietema with dielectric supports, balloon deformation, inserting a spiral with dielectric supports into a deformed balloon, and removing the mechanical deformation 2.

Despite the fact that this method has found the greatest use among similar ones, its capabilities are far from being fully realized, since part of the elastic deformation is obo-. The lugs are used to create an assembly gap, which reduces the possibilities of elastic fixing of the elements (helix, dielectric supports, balloon) of the high-frequency package and reduces its quality, as well. reducing the assembly size between the retarding system and the casing makes the assembly process more difficult and increases the likelihood of breaking dielectric supports.

The purpose of the invention is to facilitate the assembly process and improve the quality of the assembled high-frequency package fa.,

The goal is achieved by the fact that according to the method of assembling an O-type microwave device, including the assembly of a spiral-type suppressant system with dielectric supports, deforming the balloon, introducing a spiral with dielectric supports into a deformed balloon and removing the mechanical deformation, before introducing the spiral into the balloon, deform the spirals fix the deformation of the spiral and position the supporting dielectric supports along the points of the greatest deformation of the spiral directed to its axis.

The essence of the method is in the wake of a mtz.

Preforming the helix creates elastic strains in it.

and makes it possible to introduce into its cavity the fixings of the mandrel (for example, a rod of triangular cross section for fixing three rods, generally a correct ti-gon cross section for fixing P-rods), the points furthest from the axis (i.e. from the axis) exceeding the inner radius of the undeformed spiral.

The directions and places of application of external forces, creating a preliminary deformation of the spiral, coincide with the directions and places of application of forces acting on the spiral fixed in the assembled high-frequency package.

The elastic stresses of the spiral, after the termination of its preliminary deformation (removal of external forces from it), tend to return to an undeformed state, due to which the spiral is fixed on the mandrel inserted inside (in its cavity) - the deformation of the spiral is fixed.

If the dielectric supports are positioned along the points of greatest deformation of the sprack, directed towards its axis, the diameter of the circle described around the points of the dielectric supports most distant from the axis of the helix is reduced compared to the same value with the undeformed helix.

After the termination of the mechanical deformation of the cylinder, the last, fasting. After returning to the undeformed state, Squeezes the coil and anchors the slowdown system. At the same time, the mandrel (inner rod) loosens, after which it is removed from the inner cavity of the helix.

An example. A ring-rod retarding system (one type of spiral retarding system) with an outer diameter of 7.9 mm and an internal diameter of 6.78 mm is deformed by three forces of 0.05 fm. The deceleration of the retarding system is carried out in a device in which the shell is deformed and which is typical in the implementation of the prototype method (the latter in this case is also the basic method)

In a deformed retarding system, the cross section of which due to deformation takes on a triangular shape, a package of three metal rods with a diameter of 3.16 mm each is inserted.

- Three rods located close to each other with their most distant points from the package axis form vertices of an equilateral

When the triangle is inserted and the package is inserted, the retarding system is positioned so that its vertices correspond to the cross section points of the retarding system, which have the greatest deformation directed from the axis.

A package of round rods of equal diameter most simply implements the creation of a regular triangle.

After the package is inserted from the metal rods into the retarding system, the deformation of the latter is stopped and removed from the deforming device.

At the same time, the rods are clamped by the retarding system, the coder tries to return to the undeformed state, but cannot reach it, since the diameter of the circle drawn through the tops of the package of metal rods exceeds by 0.03 mm the inner diameter of the undeformed retarding system. Thus, the retarding system retains the deformed state — the deformation is fixed, while the cross-sectional points of the retarding system, located midway between the points of its contact with the metal rods, have a deformation directed inward.

Placing along these points (with the greatest deformation to the axis) three ceramic rods with a tetra of 4 mm, the package of the retarding system is introduced into the deformed shell having an internal diameter of 15.83 mm and deformed by 0.1 mm.

Then, the shell is stopped-deformed and the metal rods are removed from the retarding system, which become loose as the balloon, as it returns, to the undeformed state through the ceramic rods compresses the retarding system

0 at points located in the middle between the points of its contact with metal rods.

The force of insertion of the retarding system with ceramic with keys into the deformed shell decreases by a factor of 2.3 in comparison with the prior art method, the rods remain intact during assembly.

The use of the proposed method of fastening and retarding the system in a metal cylinder provides an increase in the assembly gap in comparison with the known ones, which facilitates the assembly process and reduces the probability of dielectric support breakdowns, stronger fixation of the retarding system, which improves the mechanical and thermal properties of the device, as well as decreases necessary pre-deformation of the metal container, which allows the assembly of miniature instruments and improves their thermal and electrodynamic properties .

Claims (1)

METHOD OF ASSEMBLY OF O-TYPE MICROWAVE DEVICE, including assembly of a spiral type retarding system with dielectric supports, deformation of a cylinder, introduction of a spiral with dielectric supports into a deformed cylinder and removal of mechanical deformation, characterized in that, in order to facilitate the assembly process and improve the quality of assembly of devices , before introducing the spiral into the balloon, the spiral is deformed, the spiral deformation is fixed, and dielectric supports are placed along the points of the greatest spiral deformation directed to its axis. ABOUT Сл о о м