DE29825063U1 - Monolithic ultrasonic sonotrode has half-wave segments, each with plate-shaped ring near vibration maximum; ultrasonic power is radiated on both sides via ring segment surfaces - Google Patents

Abstract

The device has half-wave segments (2), each with a plate-shaped ring (3) near the vibration maximum (7), via whose ring segment surfaces (5) the ultrasonic power is radiated on both sides. The sonotrode is of monolithic construction. The half-wave segments can be connected in series via connections near their vibration maxima.

Description

The invention relates to an ultrasonic sonotrode for transmission high performance with high amplitudes.

To generate and in ultrasound a medium with a desired one In principle, an ultrasonic transducer (λ / 2 transducer) which the electrical energy introduced into mechanical vibrations converts, and uses a sonotrode.

The sonotrode is as a tool to watch over that the ultrasound power is directed to the place of action. there can due to physical dependencies between the ultrasonic radiating surface of the sonotrode and the amplitude of the irradiated ultrasound only limited powers with high Amplitude can be introduced into the medium, for some industrial applications are not sufficient. The one for transferring a given high power with a predetermined high amplitude required radiation area not be provided with reasonable effort.

In the industrial application of Ultrasound for emulsifying, suspending, homogenizing all substances Kind in liquids, when disagglomerating, increasingly higher performances are at the same time high amplitudes than are possible with reasonable effort according to the prior art needed.

According to the general state of the art the ultrasound power over the face a sonotrode into the liquid irradiated or over the antinodes with rod sonotrodes. In the latter case there are only small amplitudes feasible for many applications are insufficiently effective.

When emitting the ultrasonic power over the face a sonotrode can not arbitrarily high amplitudes and high performances at the same time be emitted into a medium. At a certain amplitude only a defined highest performance can be transferred, if the diameter of the face is specified. Experience has shown that the diameter of a sonotrode should be for a λ / 2 transducer maximum chosen in the size of λ / 4, this corresponds to a diameter of 50 mm to 70 mm. This physically conditional natural limit causes either with small amplitudes below 20 μm a larger face of the Sonotrode or with a higher one Amplitude a smaller face selected. can be.

With the well-known sonatrodes that is, with a given amplitude, the maximum possible power input determined by the limited sonotrode diameter. The requirement after high amplitudes of 20 μm up to 200 μm with high power input at the same time with the well-known sonotrodes not feasible.

The invention therefore lies. the task to develop an ultrasonic sonotrode with which the defects the known sonotrodes can be avoided and. with the guaranteed is that high Performances with high amplitudes are emitted can.

According to the invention, this object is achieved by Features of claim 1 solved. The sonotrode according to the invention is formed from λ / 2 segments, each have a plate-shaped ring in the area of the vibration maximum, over its ring segment surface on both sides Ultrasound power is emitted. By stringing together λ / 2 segments can high amplitudes and high powers that are easily realized to the one you want Use case adapted can be. It can Sonotrodes with diameters up to about 70 mm in modular form to the desired one Performance strung together with high amplitudes can be realized. The sonotrodes can industrial in the kW power range be used.

It will be followed by the sonotrode The invention opened up areas of application that were previously a sound system with ultrasound due to insufficient power input or not only with an unsatisfactory amount of effort and less than satisfactory Result accessible were. With the variably configurable sonotrode according to the invention can in Connection with a precisely defined, controllable performance input Applications with higher effectiveness than before be opened up, the entry of ultrasound in liquids provide like emulsifying, suspending, homogenizing, accelerating of solution processes, unlocking of Cells, filtering and the like

Advantageous further developments of Invention result from the subclaims.

The invention is based on the following a drawing of an embodiment closer to a sonotrode explained become. Show it:

1 the schematic side view of a sonotrode with four λ / 2 segments,

2 the schematic side view of one of the λ / 2 segments and

3 the schematic side view of a sonotrode with junctions between the segments.

According to the representation in the 1 there is a sonotrode 1 for example from four λ / 2 segments 2 , each a plate-shaped ring 3 in the range of the maximum vibration 7 exhibit.

The sonotrode 1 with the four λ / 2 segments 2 is monolithic.

The 3 shows the sonotrode 1 in a modular design. Depending on the application, there are n λ / 2 segments 2 to 2 over a connection 4 , for example a screw connection, in the area of the maximum vibration 7 joined.

If the sonotrode 1 with a not darge provided HF generator with step horns (sound transducers) to longitudinal vibrations 8th is excited, then these longitudinal vibrations 8th over ring segment surfaces 5 the plate-shaped rings 3 be emitted on both sides in, for example, a liquid.

It can be done by summing the ring segment areas 5 the plate-shaped rings 3 and the face 6 of the last λ / 2 segment 2 a high power with a high power density can be entered into the liquid with a reasonable effort for the transmission of the ultrasound power.

If a certain power with a certain amplitude is to be irradiated for a desired application, then the radiation area required for this is determined and then the number n of the λ / 2 segments required 2 for the sonotrode 1 established.

about Ultrasonic processors with powers in the kW range and sonotrodes according to the invention can perform well with high sound intensity in liquids registered and an efficient and controlled processing of liquids and a constant quality of the end products can be achieved.

The invention is not based on this described embodiment limited. Rather, it is possible by combining and modifying the features described variants to realize without leaving the scope of the invention.

1

sonotrode

2

λ / 2 segment

3

plate-shaped ring

4

connection

5

Ring segment surface

6

face

7

maximum oscillation

8th

vibration direction

Claims (5)

Ultrasonic sonotrode for the transmission of high powers with a high amplitude at the same time, characterized in that the sonotrode ( 1 ) from λ / 2 segments ( 2 ) is formed, each in the area of the maximum vibration ( 7 ) a plate-shaped ring ( 3 ) over the ring segment surfaces ( 5 ) Ultrasonic power is emitted on both sides. Ultrasonic sonotrode according to claim 1, characterized in that the sonotrode ( 1 ) is monolithic. Ultrasonic sonotrode according to claim 1, characterized in that the λ / 2 segments ( 2 ) in the range of the vibration maximum ( 7 ) a connection ( 4 ) and via the connection ( 4 ) can be arranged in any order. Ultrasonic sonotrode according to claims 1 and 3, characterized in that the last λ / 2 segment ( 2 ) an end face ( 6 ) with a maximum possible diameter over which ultrasonic power is emitted. Ultrasonic sonotrode for the transmission of high powers with a high amplitude at the same time. 8th ) excited monolithic sonotrode ( 1 ) from λ / 2 segments ( 2 ) is formed, each in the area of the maximum vibration ( 7 ) a plate-shaped ring ( 3 ) over the ring segment surfaces ( 5 ) the ultrasonic power is emitted as longitudinal vibrations into a liquid on both sides.