METHOD AND DEVICE FOR MEASURING RADIAL INTERNAL CLEARANCE OF BEARING BASED ON LASER TRANSMISSION

The present disclosure provides a method and device for measuring a radial internal clearance of a bearing based on laser transmission and relates to the field of bearing parameter measurement. The method, includes the following steps: based, on diffraction of incident light at a radial internal clearance of a bearing in a stationary state, receiving first diffracted emergent light and obtaining first emergent light parameters; based on diffraction of incident light at the radial internal clearance of the bearing in a rotating state, receiving second diffracted emergent light and obtaining second emergent light parameters; and obtaining a static clearance in the bearing by combining a diffraction. pattern. of the first emergent light with. the first emergent light parameters and obtaining an operating clearance in the bearing by combining a diffraction pattern of the second emergent light with the second emergent light parameters.