Traction Characteristics of Guide Roller with the Air Entrainment

The guide roller of Shaanxi Beiren FR-400 high-speed gravure printing unit type is taken as the research object, and the guide roller traction model is established with air entrainment by using the fluid lubrication theory and mechanics theory. The influence factors such as wrap angle, guide roller diameter, web tension, equivalent roughness are analyzed. The results show that the traction force decreases with the increase of the guide roller diameter, and traction force increases with the increase of the equivalent roughness, wrap angle and web tension. Therefore we should as far as possible to design small wrap angle and we can choose a small diameter and a big equivalent roughness of guide roller to improve traction characteristics. So the study lays the theoretical foundation for the selection of the guide roller and the stable transmission of the web.