In this paper, we will discuss a method used to reduce friction and ink set-off in web-fed machines through implementing an air cushion between the web and the air bar used to influence the web trajectory. In the available academic literature, there is no study of the friction force between said two surfaces. Our goal is to establish a correlation between air tension, tensile and the web’s width. A specially designed experimental air bar was created; in a series of experiments, air was fed into the gap between the bar and the wrapping web. The results (friction force’s dependence on air tension, tensile and web’s width) are to be taken into account while designing web conductors for web-fed printing machines.
The vibration of bearings No. 60,206 with radial clearance of 0…0.45 mm is investigated. Analysis of the frequency response (FR) of vibration acceleration reveals information frequencies of 6 Hz, 15 Hz, 26 Hz, and 46 Hz, which coincide with the calculated values. The dependence of the vibration acceleration amplitude on the radial clearance for the specified frequencies is determined. The possibility of rolling bearing wear estimation by vibroacoustic diagnostic methods using artificial neural networks is proved. Diagnostic accuracy with the 4:4-3:1 MI network ranges from 75.6% for a radial clearance of 0.15 mm to 100% for a clearance of 0 mm.
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