Title:
DAMAGE DETECTION DEVICE AND ROLLING BEARING
Document Type and Number:
WIPO Patent Application WO/2023/223463
Kind Code:
A1
Abstract:
A damage detection device (10) is for detecting the state of damage of a rolling bearing provided with an inner race (2), an outer race (3), a plurality of rolling elements (4) that are arranged between the raceway surface of the outer race and the raceway surface of the inner race and that are rolled in accordance with rotation of the inner race or rotation of the outer race, or rotations of both the inner and outer races, and a rotary shaft (5) that is rotated integrally with the inner race or the outer race. The damage detection device (10) comprises: a sensor (11); an inclination processing unit (12); and a damage determination unit (13). A direction toward the center of the rotary shaft is defined as a radial direction, a direction along the shaft length of the rotary shaft is defined as an axial direction, the rotational direction of the rotary shaft is defined as a circumferential direction, and a track of the circumferential direction drawn by the center points of the rolling elements when the rolling elements rotate in the circumferential direction is defined as a rolling element rotation track line. The sensor detects the attitudes of the rolling elements. The inclination processing unit calculates inclinations of the rolling elements around a tangent of the rolling element rotation track line passing through the center points of the rolling elements on the basis of measurement data detected by the sensor. The damage determination unit calculates the state of a damage on the basis of the inclinations.
Inventors:
TAKARA NAOKATSU (JP)
KINOSHITA ATSUSHI (JP)
KINOSHITA ATSUSHI (JP)
Application Number:
PCT/JP2022/020683
Publication Date:
November 23, 2023
Filing Date:
May 18, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F16C19/52; F16C41/00
Foreign References:
| JP2014066622A | 2014-04-17 | |||
| JP2002054914A | 2002-02-20 | |||
| JPS63251619A | 1988-10-19 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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