| 摘要 |
<p>The invention relates to a screen system (1, 2, 3) with a tube-shaped screen (10, 30) comprising a tube (11) with at least one section (12) with screen openings that are directly arranged in the wall of the tubes, and/or comprising a screen frame (31), defining at least the length and the cross-section of a tube, and a screen mesh (32) that is tensioned on the screen frame, so that the screen mesh (32) forms at least a part of the surface of the tub- shaped screen (10, 30). The screen system (1, 2, 3) comprises at least one ultrasonic converter (13) and at least one feed line sound conductor (14, 24, 34) arranged between the ultrasonic converter (13) and the tube (11) or the screen frame (31), wherein furthermore the tube (11) or the screen frame (31) can be exposed by means of the ultrasonic converter (13) and the feed line sound conductor (14, 24, 34) to an ultrasonic excitation, and wherein the feed line sound conductor or conductors (14, 24, 24) is or are designed such that the amplitude of the ultrasonic excitation transmitted to the tube (11) or the screen frame (31) comprises a component in the perpendicular direction to a center axis (A-A) of the tube-shaped screen (10, 30) and a component in the parallel direction to the center axis (A-A) of the tube-shaped screen (10, 30). The invention also relates to a method for operating a screen system (1, 2, 3) with a tube-shaped screen (10, 30) of said kind, wherein the tube (11) or the screen frame (31) is excited to oscillate by means of ultrasound, wherein the tube (11) or the screen frame (31) is excited by means of ultrasonic excitation, wherein the amplitude thereof comprises a component in the perpendicular direction to a center axis (A-A) of the tube-shaped screen (10, 30) and a component in the parallel direction to the center axis (A-A) of the tube-shaped screen (10, 30).</p> |
