METHOD AND DEVICE FOR ASSESSING REMAINING LIFE OF ROLLING BEARING

WIPO Patent Application WO/2005/095919

A1

A method and a device for assessing the remaining life of a rolling bearing capable of early and accurately estimating the life of the roller bearing based on the detected states of refuse and lubricating oil by detecting, at low cost, the mixing of the refuse in the lubricating oil and the state of deterioration of the lubricating oil by the mixing of water therein which largely affect the life of the rolling bearing by using the resonance frequency band signals and high frequency signals of an acceleration sensor. The device comprises, to know the relation of the mixed state of the refuse and the vibration of the rolling bearing (3) with the life of the bearing and the relation of the deterioration of the lubricating oil and the vibration of the rolling bearing (3) with the life of the bearing, a basic data collecting means obtaining vibration signals by using the acceleration sensor (4) for each specification of the bearing such as the model number and manufacturer's name of each roller bearing (3) and collecting the resonance frequency band signals detectable with the highest sensitivity by an experiment apparatus, a measuring means obtaining the vibration signals by using the acceleration sensor (4) for the rolling bearing (3) for assessing the remaining life installed in rotary equipment (1) and (2) such as pumps and fans and measuring the resonance frequency band signals detectable with the highest sensitivity, and a determination means estimating the mixed state of the refuse and the deteriorated state of the lubricating oil of the assessed rolling bearing (3) by using the measured results obtained by the measuring means, the determined results by a bearing specification determination means and calculating the remaining life of the assessed roller bearing (3).

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IWATSUBO TAKUZO (JP)
SHIROMARU ISAO (JP)
TANAKA MAKOTO (JP)
AKAMATSU YOSHINOBU (JP)
NAGAYASU YOJI (JP)
BODA SHINGO (JP)

PCT/JP2005/005956

October 13, 2005

March 29, 2005

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CHUGOKU ELECTRIC POWER (JP)
NTN TOYO BEARING CO LTD (JP)
SHINKAWA SENSOR TECHNOLOGY INC (JP)
IWATSUBO TAKUZO (JP)
SHIROMARU ISAO (JP)
TANAKA MAKOTO (JP)
AKAMATSU YOSHINOBU (JP)
NAGAYASU YOJI (JP)
BODA SHINGO (JP)

G01H17/00; G01M13/04; G01M99/00; (IPC1-7): G01M13/04; G01H17/00; G01M19/00

JP2004003891A	2004-01-08
JPH08159151A	1996-06-18

TANAKA M. ET AL: "Kasokudo Sensor o Mochiita Korogari Jikuuke no Yojumyo Shindan Shuho no Kaihatsu", THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SYMPOSIUM KOEN RONBUNSHU, vol. 2002, 2002, pages 46 - 51, XP002997016
See also references of EP 1731893A4

Takemasa, Yoshiaki (4-3 Mita 3-chom, Minato-ku Tokyo 73, JP)

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