SU113357A1 - Ultrasound transducer - Google Patents

Description

In a number of industrial processes, ultrasound emitters with vibrators mounted on a quarter-wave pedestal in the form of a thin-walled cylinder ending in a massive flange are used.

However, the stand in the form of a cylinder, even after careful adjustment, still absorbs a significant part of the vibrational energy of the vibrator.

In order to eliminate this drawback, in the described radiator it is proposed to separate the flange of the stand from the cylindrical part with a concentric annular groove with a depth equal to approximately / of the thickness of the flange.

FIG. 1 shows a longitudinal section of the proposed radiator; in fig. 2 is a section through a stand for a vibrator.

The vibrator 1 (Fig. 1), made of a material with high magnetostriction, is mounted in the radiator on the resonating stand 2, with which it is connected by means of thread and welding.

The vibrator is excited by an electric current passed through the solenoid 3, and the constant bias is produced by means of two horseshoe-shaped electromagnets 4 mounted on the side walls and the bottom of the body 5.

The pedestal (Fig. 2) is a thin-walled cylinder 6, terminated by a massive flange 7 with an annular groove 8 cut in / out of its thickness.

With such an arrangement, the assembly of the oscillatory movement of the end of the vibrator / creates in it compression and tension deformations, which in the form of elastic waves propagate to the flange and, reflecting, form a displacement unit in it. The flange itself at the plane of contact with the body almost does not oscillate, since the groove 8, as it were, reduces its thickness.

The dimensions of the stand (its length and average radius) are vibrated so that the frequency of the radial oscillations of the cylinder 6 is coordinated with the frequency of the vibrations of the vibrator.

Under ETHYL conditions, the longitudinal and radial oscillations are high, the ots are in tact and form a tuned system of parametric excitation, which helps to reduce notary vibrational energy.

Subject and sbrege and

Ultrasound emitter for attaching the vibrator

a quarter-wave stand in the form of a thin-walled cylinder terminating with a massive flange, according to the fact that, in order to reduce not only the vibratory ethergy of the vibrator, the stand flange is separated from the cylindrical part by a concentric annular groove equal to about / half the flange.