| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing testing device and method capable of reproducing and evaluating precisely decline of a bearing lifetime caused by brittle separation. SOLUTION: A test bearing 2 and a dummy bearing 3 are mounted at an interval on a rotary axis 1 driven with a belt by a motor 5, to which a load is applied by a tension of an endless belt 7, and each outer ring 2b, 3b of the test bearing 2 and the dummy bearing 3 is fixed to mutually-insulated different housings 4a, 4b. The interval between contact terminals 8a, 8b mounted on each housing 4a, 4b is energized, and a current is made to flow between an inner ring 2a and the outer ring 2b of the test bearing 2 through a ball 2c. Hereby, hydrogen is generated forcibly by electrolysis from grease enclosed in the test bearing, and thereby brittle separation supposed to be caused by hydrogen brittleness can be reproduced, and decline of the bearing lifetime caused by the brittle separation can be evaluated precisely. COPYRIGHT: (C)2007,JPO&INPIT
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