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US 7,115,894 B2Granted
Method to determine the lubricant filling degree of a fluid dynamic bearing
AssigneeMinebea Co., Ltd.
InventorsNorbert Irmer, Carsten Etling, Guido Schmid
Life of this patent
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Abstract
In order to improve a method to determine the lubricant filling degree of a fluid bearing in which the bearing gap of the fluid bearing is illuminated and the luminous reflectance is analyzed so that the filling degree can be determined in a simple and reproducible manner, it is provided that a spatial intensity profile of the reflected light is recorded.
Claims22
A method to determine the lubricant filling degree of a fluid bearing, comprising:
- illuminating a bearing gap of the fluid bearing;
- and
- analyzing a luminous reflectance of reflected light from the bearing gap;
- wherein:
- a spatial intensity profile of the reflected light is recorded;
- and
- the intensity profile is analyzed with respect to a recognition of reflection maxima.
4 more elements
A method to determine the lubricant filling degree of a fluid bearing, comprising:
- illuminating a bearing gap of the fluid bearing;
- and
- analyzing a luminous reflectance of reflected light from the bearing gap;
- wherein:
- a spatial intensity profile of the reflected light is recorded;
- and
- the bearing gap is exposed to light at an acute angle with respect to a longitudinal axis of a shaft of the fluid bearing.
4 more elements
A method to determine the lubricant filling degree of a fluid bearing, comprising:
- illuminating a bearing gap of the fluid bearing;
- and
- analyzing a luminous reflectance of reflected light from the bearing gap;
- wherein:
- a spatial intensity profile of the reflected light is recorded;
- and
- a measurement plane is inclined at an acute angle with respect to a plane perpendicular to a longitudinal axis of a shaft of the fluid bearing.
4 more elements
Dependencies are inferred from the claim text.