ABNORMALITY DETECTION DEVICE AND ABNORMALITY DETECTION METHOD OF FLUID BEARING

PROBLEM TO BE SOLVED: To provide an abnormality detection device and abnormality detection method of a fluid bearing, capable of detecting occurrence of clogging in a flow passage of an orifice, and capable of cleaning the orifice at proper timing.SOLUTION: An abnormality detection device of a fluid bearing includes: a bearing body 2; a bearing hole 3 formed in the bearing body 2; a plurality of pockets 4 opened on an inner peripheral surface of the bearing hole 3 and arranged with intervals around a center axis O of the bearing hole 3; a plurality of flow passages 28 communicating with the plurality of pockets 4; an orifice 5 detachably disposed in the flow passage 28; a plurality of pressure sensors 22 configured to measure fluid pressure held in the plurality of pockets 4; and a control unit 27. The control unit 27 is configured to, when among pressure measurement values measured by the plurality of pressure sensors 22, the difference between a maximum value and a minimum value is a predetermined value or more, detect abnormality.SELECTED DRAWING: Figure 2 【課題】オリフィスの流路に詰まりが生じたことを検知することができ、適正なタイミングでオリフィスの清掃を行うことができる流体軸受の異常検知装置及び異常検知方法を提供すること。【解決手段】軸受本体２と、前記軸受本体２に形成された軸受孔３と、前記軸受孔３の内周面に、該軸受孔３の中心軸Ｏ回りに互いに間隔をあけて開口する複数のポケット４と、複数の前記ポケット４に連通する複数の流路２８と、前記流路２８に着脱可能に配設されるオリフィス５と、複数の前記ポケット４に保持される流体の圧力を測定する複数の圧力センサー２２と、制御部２７と、を備え、前記制御部２７は、複数の前記圧力センサー２２が測定した圧力の測定値のうち、最大値と最小値との差が所定値以上となったときに、異常を検知することを特徴とする。【選択図】図２