Diagnosis of extremely low-speed rolling-element bearing using AE envelope waveform

Takashi Sako, Osamu Yoshie

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Most low-speed rotating equipments are large and important. Therefore, a plant will suffer substantial losses if the operation of such equipments stops because of any damage to their rolling-element bearings. This paper discusses a diagnostic method for rolling-element bearings in rotating equipments with extremely low speeds of 100 rpm or less and further, it proposes a diagnostic method based on acoustic emission (AE) envelope waveform of 100 kHz to 1MHz frequency. Abnormality diagnosis was performed even for a rotation number of 1 rpm by improving the signal-to-noise (S/N) ratio by carrying out further amplification after envelope waveform processing and AE waveform amplification. Furthermore, a method for removing electric noises and an abnormality-diagnosis method based on an event-counting method in the case of extremely low-speed rotation are proposed. Further, we are manufacturing a diagnostic instrument based on this diagnostic method, and we are performing abnormality diagnosis and monitoring of on-site conditions.

Original languageEnglish
JournalIEEJ Transactions on Industry Applications
Volume132
Issue number4
DOIs
Publication statusPublished - 2012

Fingerprint

Bearings (structural)
Acoustic emissions
Amplification
Signal to noise ratio
Monitoring
Processing

Keywords

  • Acoustic emission
  • Low speed rotating equipment
  • Machine condition monitoring
  • Machine diagnosis
  • Rolling element bearing
  • Signal processing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering

Cite this

Diagnosis of extremely low-speed rolling-element bearing using AE envelope waveform. / Sako, Takashi; Yoshie, Osamu.

In: IEEJ Transactions on Industry Applications, Vol. 132, No. 4, 2012.

Research output: Contribution to journalArticle

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