Ultrasonic sonotrode for irradiating ultrasonic energy into fluid or pasty media, comprises, in longitudinal direction, coupling section, base section, transition section, and flat section with end-face region as irradiation surface

摘要

An ultrasonic sonotrode comprises, in longitudinal direction, a coupling section for coupling an active ultrasonic system, a base section having a largest dimension transverse to the longitudinal direction larger than its length in the longitudinal direction, a transition section for reducing a cross-section in at least one cross-section with respect to the base section, and a flat section with an end-face region as an irradiation surface. An ultrasonic sonotrode comprises, in longitudinal direction (z), a coupling section (4) for coupling an active ultrasonic system that excites longitudinally in the longitudinal direction, a base section (1) having a largest dimension transverse to the longitudinal direction larger than its length in the longitudinal direction, a transition section (9) for reducing a cross-section in at least one cross-section with respect to the base section, and a flat section (2) with an end-face region (3) as an irradiation surface. The flat section is divided by slot(s) into tongues that are unconnected in the end-face region. The dimensions of the base section transverse to the longitudinal direction in a border region to the transition section are always >=lambda /4 and a shortest length of the base section in the longitudinal direction is less than lambda /4. An independent claim is also included for an ultrasonic device comprising the above ultrasonic sonotrode, and an active ultrasonic system coupled on coupling section. The largest cross-sectional area of a base section of sonotrode is larger than the coupling area of the coupling section to the active ultrasonic system.