Год выпуска: 2012 Автор: Juha Leimu Издательство: LAP Lambert Academic Publishing Страниц: 164 ISBN: 9783659258169
Описание
One of the bottlenecks in raising the running speed of wide modern paper machines is the cylinder dryer runnability. The wet web is meant to follow the fabric in the opening nip leaving the cylinder, but it often tends to follow the cylinder surface, causing a web break. What happens in the opening nip is often discussed on the qualitative level, but usually without quantitative analysis. The opening nip dominating forces are recognized. The opening nip aerodynamic underpressure is also studied experimentally. The results of underpressure have been applied to a model, which, further on, is used for modelling the web behaviour in the opening nip. The results combine the most important opening nip forces, giving a logical picture of the web behavior in the opening nip. The opening nip runnability can be controlled by adjusting the level of the runnability system underpressure. Different methods for producing this underpressure have been studied, aiming to obtain reliable dimensioning...
Марина Михайловна, я защитился. Завтра получаю диплом. Перед тем как к вам обратиться у меня были сомнения, что мне сделают качественную работу, но потом сомнения исчезли. Спасибо вам за помощь, диплом был сделан на профессиональном уровне