| 摘要 |
PROBLEM TO BE SOLVED: To obtain a measuring apparatus by which the dynamic torque of various rolling bearings can be measured precisely under various conditions by providing a static-pressure bearing which prevents a housing from being displaced to the axial direction and which permits the housing to be displaced to the circumferential direction. SOLUTION: In a rolling bearing 1a as an object to be measured, its outer ring 2a is fitted internally to a housing 3a so as to be fixed, and its inner ring 4a is fitted externally to a rotating driving shaft 5a so as to be fixed. A static-pressure bearing 6a is installed in the lower part of the housing 3a, and the weight of the housing 3a and that of the rolling bearing 1a are supported and borne. A pair of static-pressure bearings 22, 23 are installed on both sides in the axial direction of the housing 3a in order to prevent the housing 3a from being displaced and moved to the axial direction. When the dynamic torque of the rolling bearing 1a is measured, a radial load is applied to the rolling bearing 1a via the static-pressurebearing 6a and the housing 3a, and the inner ring 4a is turned and driven by the rotation driving shaft 5a. Then, a dynamic torque which is applied to the outer ring 2a is measured on the basis of the rolling resistance of a plurality of rolling bodies which constitute the rolling bearing 1a.
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