Suction roll of a paper machine having a noise damping chamber

US5925220A · kind A · utility

Assignee

• Voith Sulzer Papiermaschinen GmbH · DE

Inventors

• Adalbert Hirsch · Aalen, DE
• Hans Prinzing · Heidenheim, DE

Key dates

• Filing date: Apr 19, 1996
• Grant date: Jul 20, 1999
• Expiry date: Apr 19, 2016

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F3/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A suction roll for a paper machine or the like including a perforated annular roll shell which is rotatable. A stationary suction box inside the roll shell with respect to which the shell rotates. The suction box is defined between two circumferentially spaced sealing ledges at the roll shell. A noise dampening chamber on the downstream side of the suction box defined by a further sealing ledge at the roll shell. A conduit communicating to the noise damping chamber to allow increased pressure in the chamber which reduces noise. At least one of a snifter valve, a suction blower, an air pump and a water pump communicating to the conduit for selectively adjusting the pressure in the noise damping chamber for damping roll noise.