Roll with vibration damper

US5730692A · kind A · utility

Assignee

• Voith Sulzer Papiermaschinen GmbH · DE

Inventor

• Joachim Grabscheid · Gerstetten, DE

Key dates

• Filing date: May 20, 1996
• Grant date: Mar 24, 1998
• Expiry date: May 20, 2016

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21G1/022
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A roll with vibration damping, particularly useful for the manufacture or treatment of fiber webs, such as paper or cardboard. The roll has a central shaft with a central feed channel for pressurized liquid and a roll shell rotatable around the stationary central shaft. A plurality of radially extending cylinders in the shaft communicate with the feed channel. A respective piston in each cylinder holds a radially outward shoe pressed in sliding engagement against the interior of the roll shell. One of several types of elastically yieldable elements is disposed in the central shaft and communicates with the feed channel for maintaining the pressure of the liquid in the feed channel upon the roll vibrating. The elastically yieldable elements include any of a spring supported piston, an elastic membrane, a closed end pipe with thin walls or a pair of separated membranes held together by a tie bar so that both membranes are pulled to apply pressure to the liquid. The elastically yieldable element may be in a separate bore defined in the central shaft at an angular location around the shaft away from the cylinder.