Patent ID: 7126677

Claim:
A bearing with an oil film thickness measuring device, comprising: a bearing body for supporting a shaft via an oil film; and the oil film thickness measuring device for measuring a thickness of said oil film formed on the sliding surface of said bearing body, wherein a fluorescent agent which generates fluorescence of a predetermined wavelength is mixed in a lubricating oil, and a plurality of sensor mounting portions are provided in said bearing body, and said oil film thickness measuring device comprises: laser beam generating means for generating a laser beam with a wavelength different from the wavelength of said fluorescence; an approach-route optical fiber having one end of which is connected to said sensor mounting portion and for applying the laser beam generated by said laser beam generating means to an oil film on said sliding surface of said bearing body; a return-route optical fiber having one end of which is connected to said sensor mounting portion and for receiving the fluorescence generated by the fluorescent agent in said oil film according to the application of said laser beam and introducing it to the outside; detector means for detecting a tilt state of the bearing body with respect to the shaft; fluorescence intensity detecting means for detecting the intensity of fluorescence passing through said return-route optical fiber; and tilt measuring means for measuring the tilt state of the bearing body, wherein the oil film thickness is measured based upon a detection result of the fluorescence intensity detecting means and the measured oil film thickness is used by the tilt measuring means for measuring the tilt state of the bearing body.