Method for the detection and quantitative evaluation of a balance error in a shaft-bearing system

US7650254B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Alfred Pecher · Stadtlauringen, DE
• Stefan Gluck · Schweinfurt, DE
• Joachim Hering · Gammertingen, DE

Key dates

• Filing date: Feb 4, 2004
• Grant date: Jan 19, 2010
• Expiry date: Feb 4, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M1/22
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for detection and quantitative evaluation of a balance error occurring in a component-bearing system. Static and dynamic forces acting upon the bearing are determined by sensors of a measuring bridge, which are disposed on a rolling bearing and which change the inherent electrical resistance according to the applied pressure, and are made available for analysis in a computer in the form of a periodic test signal that is common to both forces. In order to analyze the test signal, the weighted average of the modulation frequency generated by a balance error and the weighted mean variance thereof are determined from the test signal. The variance is then compared with a given variance threshold value. A variance lying below the variance threshold value is considered to be an indication of a significant balance error in the bearing.