Steel-made yankee cylinder

US9206549B2 · kind B2 · utility

Assignee

• VALMET AKTIEBOLAG · FI

Inventors

• Jonas Cederloef · Karlstad, SE
• Hans Ivarsson · Karlstad, SE
• Andreas Hjaertqvist · Grums, SE
• Magnus Hoegman · Kil, SE
• Stefan Moden · Kil, SE
• Johnny Anerud · Karlstad, SE
• Stefan Thyberg · Karlstad, SE
• Sune Wendelsson · Karlstad, SE
• Martin Raedman · Kil, SE
• Anna Danielsson · Karlstad, SE

Key dates

• Filing date: Nov 5, 2013
• Grant date: Dec 8, 2015
• Expiry date: Nov 5, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B13/183
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a steel-made Yankee cylinder (1) that comprises a cylindrical shell (2) having two axial ends (3, 4). An end wall (5, 6) is connected to each axial end (3, 4) by a circumferential weld bead (7). The cylindrical shell has an inner surface (8) in which circumferential grooves (9a, 9b, 9c, 9d, 9e) are formed. From the outermost circumferential groove (9a) at each axial end (3, 4) to the circumferential weld bead (7) at that axial end (3, 4) the wall thickness (T) of the cylindrical shell is either constant or decreasing and the depth (d1) of the circumferential grooves increases axially from the outermost circumferential groove (9a).