Shoe press unit

US6036820A · kind A · utility

Assignee

• Voith Sulzer Papiermaschinen GmbH · DE

Inventors

• Christian Schiel · Heidenheim, DE
• Joachim Grabscheid · Gerstetten, DE
• Wolfgang Schuwerk · Leutkirch im Allgäu, DE
• Rudolf Hasenfuss · Herbrechtingen, DE

Key dates

• Filing date: Apr 9, 1998
• Grant date: Mar 14, 2000
• Expiry date: Apr 9, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F3/0218
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Shoe press unit and method for treatment of a fibrous pulp web. The shoe press unit includes at least one press shoe, an opposing surface, a flexible press belt guided over the press shoe, and at least one force element composed of a cylinder/piston unit supported on a carrier. The at least one force element presses the press belt against the opposing surface to form a press zone elongated in a web run direction, and the cylinder/piston unit include a pressure chamber having at least one pair of cylinder/piston subunits successively positioned in the web run direction. Pressure fluid lines are coupled to respective ones of the at least one pair of cylinder/piston subunits to separately supply pressure fluid to each cylinder/pressure subunit to impart a tilting moment long a tilt axis substantially perpendicular to the web run direction. The method includes supplying a pressure fluid to a first and second pressure fluid line from a common pressure fluid source at a source pressure, supplying pressure fluid through the first pressure fluid line at a first fluid pressure to a first subunit of the at least one pair of cylinder piston subunits, supplying pressure fluid through the secon…