SU437155A1 - Waveguide connection - Google Patents

Description

one

The invention relates to elements of waveguide radio engineering, in particular to fixed, detachable connections of waveguide sections, and may find application in sealed waveguide paths.

A waveguide connection is known that is used for sealing waveguide paths containing waveguides with flanges provided with choke channels. Between the waveguide flanges, a radio transparent dielectric clamped gasket and a rubber sealing ring are clamped.

However, the known waveguide connection is not sufficiently high performance, namely; The assembly of the joint is complex and can only be carried out in stationary conditions with careful coupling of all parts included in it; The fluidity of the gasket material, which is under considerable constant pressure, leads over time to a deterioration in the degree of air sealing, which, as a rule, for these compounds does not exceed I -1.5 atm; an increase in the degree of air tightness is associated with a deterioration in the electrical tightness of the flange joint, since it requires the provision of gaps between the wave flanges.

The aim of the invention is to improve the performance.

For this, a sealing ring is placed on the bottom of the throttle groove, wherein

The edge of the gasket, formed in the form of a glass, abuts against it.

The invention is illustrated in the drawing. The drawing shows the structure of a waveguide connection.

The waveguide connection contains waveguides 1, 2 with flanges 3, 4. Flange 4 is equipped with a throttle groove. Between the flanges 3, 4 is placed in the cavity of the throttle groove a radio-transparent dielectric gasket 5

(for example, from fluoroplast-4), made in the form of a glass. A rubber sealing ring 6 is inserted into the bottom of the throttle groove. Waveguide flanges 3, 4 are interconnected by bolts 7.

The dimensions of the glass are determined by the dimensions of the throttle groove, made with regard to filling it with a dielectric (gasket material 5). The thickness of the bottom of the glass is chosen from the condition

 i

where d is the thickness of the bottom of the glass,

K is the length of the working wave in the waveguide, and e is the dielectric constant of the material of the glass.

Usually d is chosen minimal, in 1 limits (0,01-0,03) I ,. With a large thickness of the glass, the seal disrupts the waveguide path (serves as a source of parasitic reflections of transmitted waves).

When mounting the waveguide joint, the flanges 3, 4 are bolted 7. A dielectric pad b enters the cavity of the throttle flange 4, thereby deforming the rubber ring 6, which as a result tightly connects the bottom and the adjacent walls of the throttle groove to the edges of the cup, sealing off tightly waveguide section.

The simplicity of the design of the connection and installation allows the assembly of sealed waveguide paths not only in stationary but also in field conditions. The connection remains operable when pressure drops to the pressure, i.e. it

provides reliable sealing of the waveguide path by an order of magnitude higher than the known flange connection that does not deteriorate the electrical tightness. The quality of tightening the flange bolts and the aging of the gasket material do not affect the quality of sealing.

Subject invention

A waveguide joint containing waveguide lengths with flanges, one of which is provided with a throttle groove, a radio translucent dielectric gasket between the flanges, and a rubber sealing ring,

characterized in that, in order to improve performance, a sealing ring is placed at the bottom of the throttle groove, the gasket is designed as a cup and rests against the ring with its edges.