Nsk Corporation

Ichiro Joko

Hitoshi Yamada

Nobuaki Mitamura

Hidenobu Magami

Masahide Natori

Tohru Ueda

Takamasa Ohira

Tsuyoshi Nomura

A bearing residual life prediction method, a bearing residual life diagnostic apparatus and a bearing diagnostic system can be provided. The bearing diagnostic systemincludes: an eddy current testerthat measures the impedance X of a certain portion of a bearingbefore and after the use of the bearing; a bearing information transmitterthat transmits bearing information scontaining the impedance X; and a bearing information receiverthat receives the information; a diagnostic sectionthat obtains the residual life information sof the bearingbased on the received impedance X; and a life information transmitterthat transmits the residual life information s; and a life information receiverthat receives the information. Hence, the bearing used by the user can be inspected nondestructively, and the residual life of the bearing can be predicted.

Bearing residual life prediction method, bearing residual life diagnostic apparatus and bearing diagnostic system

An apparatus of producing bearing device having a bearing, a shaft attached to an inner ring and an outer ring attaching member attached to an outer ring. The apparatus includes a vibrating unit of giving a radial input vibration to each inner ring or both ends of the shaft, and an input vibration detecting unit of detecting vibration of each inner ring or both ends of the shaft, an adding unit of calculating the output of the input vibration detecting unit, a vibration detecting unit of detecting the vibration of a mass attached to the outer ring attaching member, a transfer function calculating unit of determining the transfer function from the output of the vibration detecting unit and the adding unit to calculate the resonance frequency and a rigidity calculating unit of determining the rigidity of the bearing device on the basis of the resonance frequency.

Device and method for evaluating rigidity of bearing device, device and method for manufacturing bearing device, and bearing device

Growing community of inventors

Kanagawa, Japan

Ichiro Joko