APPARATUS FOR DIAGNOSING ABNORMALITY OF ROLLING BEARING

PURPOSE:To miniaturize the title apparatus and to simply inspect the release damage on the track surface of a rolling bearing by selectively extracting the specific frequency band of the AE generated from the bearing and detecting an envelope. CONSTITUTION:An AE sensor 1 is mounted on a rolling bear...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TSUBOI SHIGEKI, NAGAMIZO HISASHI
Format:	Patent
Sprache:	eng
Schlagworte:	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 MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MECHANICAL ENGINEERING PHYSICS 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 WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To miniaturize the title apparatus and to simply inspect the release damage on the track surface of a rolling bearing by selectively extracting the specific frequency band of the AE generated from the bearing and detecting an envelope. CONSTITUTION:An AE sensor 1 is mounted on a rolling bearing and the acoustic emission (AE) generated from the bearing is detected by the sensor 1 to be amplified by a preamplifier 2 and, thereafter, the 100 - 700KHz band corresponding to the frequency band of the AE generated from a crack is selectively extracted by a band-pass filter 3. Next, the signal of the aforementioned band is amplified by a main amplifier 4 and an envelope is detected by an envelope detecting processor 5 to input a beat component to a frequency analyser 6 and the analytical result thereof is displayed on a display device 7. When there is a crack, a peak is present at a specific frequency position, and the presence of damage can be detected.