ABNORMALITY DIAGNOSING METHOD FOR OIL FILM BEARING SYSTEM OF ROLLING ROLL

• Main Author: KANAO YASUHIKO
• Format: Patent
• Language: English
• Published: 08.12.1987
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEASURING; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PHYSICS; PUNCHING METAL; ROLLING OF METAL; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

PURPOSE:To early diagnose an existence of abnormality by applying a rolling reduction force on rolls in the state of forming a oil film in bearings, stopping the oil feeding to calculate a reduction portion of the rolling reduction force, obtaining the thickness of the oil film from the reduction portion of the rolling reduction force and a spring constant of the mill and compairing with the set thickness of the oil film. CONSTITUTION:The rolling reduction force loaded on the working rolls 31 are measured by a load cell 26 provided on an upper part of the rolling mill and indicated on a control panel 23 or an operation panel. Then, the feeding of the lubricating oil to the bearing is stopped to measure the reading of the rolling reduction force of the load cell 26 in the state of making-up no oil film. The oil film thickness of the oil film bearing is obtained from the reduced portion of the rolling reduction force at this time and the previously measure spring constant of the mill to compair with the previously set value of the oil film thickness. In this way, the abnormality of the oil film bearing system is diagnosed easily to prevent a seizure, etc., of the bearing.