Ultrasonic vibration unit with damping

An ultrasonic vibration unit which has a converter (1) for converting an electric ac voltage into a mechanical ultrasonic vibration and a sonotrode which is vibrationally coupled to the converter (1),

• wherein the sonotrode and the converter (1) are matched to each other in such a way that the ultrasonic vibration unit can vibrate with a natural frequency f, in which a standing longitudinal wave with at least one vibration node and at least two vibration antinodes is formed within the ultrasonic vibration unit,
• characterised in that there is provided a damped vibration absorber unit (2) connected to the ultrasonic vibration unit by way of a coupling element (3),
• wherein the coupling element (3) is connected at a vibration node to the ultrasonic vibration unit,
• wherein the vibration absorber unit (2) is connected to a damping element (4) which is so designed that it damps a vibration of the vibration absorber unit (2) wherein the coupling element (3) is arranged at the converter (1).

An ultrasonic vibration unit which has a converter (1) for converting an electric ac voltage into a mechanical ultrasonic vibration and a sonotrode which is vibrationally coupled to the converter (1),

• wherein the sonotrode and the converter (1) are matched to each other in such a way that the ultrasonic vibration unit can vibrate with a natural frequency f, in which a standing longitudinal wave with at least one vibration node and at least two vibration antinodes is formed within the ultrasonic vibration unit,
• characterised in that there is provided a damped vibration absorber unit (2) connected to the ultrasonic vibration unit by way of a coupling element (3),
• wherein the coupling element (3) is connected at a vibration node to the ultrasonic vibration unit,
• wherein the vibration absorber unit (2) is connected to a damping element (4) which is so designed that it damps a vibration of the vibration absorber unit (2),
• wherein the damping element (4) has a contact surface with which the damping element (4) is in contact with the vibration absorber unit (2),
• wherein the contact surface is greater than 2 cm2.

An ultrasonic vibration unit which has a converter (1) for converting an electric ac voltage into a mechanical ultrasonic vibration and a sonotrode which is vibrationally coupled to the converter (1),

• wherein the sonotrode and the converter (1) are matched to each other in such a way that the ultrasonic vibration unit can vibrate with a natural frequency f, in which a standing longitudinal wave with at least one vibration node and at least two vibration antinodes is formed within the ultrasonic vibration unit,
• characterised in that there is provided a damped vibration absorber unit (2) connected to the ultrasonic vibration unit by way of a coupling element (3),
• wherein the coupling element (3) is connected at a vibration node to the ultrasonic vibration unit, wherein the vibration absorber unit (2) is connected to a damping element (4) which is so designed that it damps a vibration of the vibration absorber unit (2),
• wherein the mass of the vibration absorber unit (2) is between 1% and 10% of the mass of the ultrasonic vibration unit.