ROLL DEVICE

• Main Authors: TANIMOTO TERUBUMI, KONO KAZUKIYO, AKEGA KENTARO, NAKANO KIYOSHI
• Format: Patent
• Language: English
• Published: 20.10.2000
• Edition: 7
• Subjects: ACCESSORIES FOR PAPER-MAKING MACHINES; BEARINGS; BLASTING; CALENDERS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODS OF PRODUCING PAPER THEREON; PAPER-MAKING; PAPER-MAKING MACHINES; PRODUCTION OF CELLULOSE; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TEXTILES; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To prevent the reduction of an oil film thickness of a shoe end part by forming crowning on a shoe surface of a roll device whose inner face is supported through an oil film between a hydrostatic shoe and it and which rotates and has a hollow roll cell. SOLUTION: A shoe lubrication face in both end parts in the longitudinal direction of a hydrostatic shoe 2 is shaved off by a crowning amount δ1. A crowning shape is desirably a shape matching with a bending pattern of the shoe 2, but a shape close to a crowning shape like circular arc and taper may be used. The crowning amount is determined by pressure, bending rigidity, metal seal leak amount, etc., and the shoe 2 having low bending rigidity requires a large amount. Even if the shoe 2 is bent upward due to oil leakage in the end part, it is mutually cancelled with crowning to form a uniform clearance between an inner face of a hollow roll cell and it, ensure a proper oil film thickness, prevent the occurrence of burning accident, and increase the safety and reliability.