Abstract: A bearing construction having an annular clearance provided between the outer surface of a rotary shaft of a rotatable object and the inner wall of a bearing assembly and a fluid feeding means for filling the clearance with a fluid to form a layer of the fluid. A shaft displacement detecting means detects a displacement of the rotary shaft during a rotating action.

Abstract: The present invention relates to an unbalance point positioning method and an apparatus therefor, which carry out a positioning operation with high precision and within a short time by using, as a trigger, an unbalance phase signal due to revolution of an unbalance point of a measured object, and effecting deceleration control through feedback control with a voltage corresponding to a rotational frequency of the measured object.The apparatus includes means for rotating the object at a high speed and for determining the amount as well as the angular position of the unbalance of the object. Once the angular position is determined, this information is used to trigger a predetermined deceleration signal, which smoothly and continuously decelerates the measured object until the object is stopped with the unbalance point at a preselected position. A gradual deceleration curve, generated using a resistor and capacitor circuit, is used to minimize slippage between the rotating object and the drive mechanism.

Abstract: A measured object support mechanism for use in an unbalance measuring apparatus for detecting vibrations resulting from rotation of a measured object supported by a measured object supporting member and measuring an unbalance of the measured object. This support mechanism comprises a slidable supporting device disposed between a base block supporting the unbalance measuring apparatus and the measured object supporting member.

Abstract: A measured object support mechanism for use in an unbalance measuring apparatus for detecting vibrations resulting from rotation of a measured object supported by a measured object supporting member and measuring an unbalance of the measured object. This support mechanism comprises a slidable supporting device disposed between a base block supporting the unbalance measuring apparatus and the measured object supporting member. The support mechanism further comprises a second slidable supporting device disposed between the base block and a dummy weight in order to detect external vibrations.