Optical fiber sensor capable of detecting thickness and temperature of lubricating oil film of sliding bearing simultaneously

Abstract

The invention discloses an optical fiber sensor capable of detecting thickness and temperature of a lubricating oil film of a sliding bearing simultaneously, and the sensor comprises an optical fiber probe, a light source, a photoelectric conversion and filtering amplification module, and a collection processing and display module. The optical fiber probe comprises one transmitting optical fiber TF, and two groups of receiving optical fibers: the first group of receiving optical fibers RF1 and the second group of receiving optical fibers RF2. There is a distance difference between an end face of the first group of receiving optical fibers RF1 and an end face of the second group of receiving optical fibers RF2. The light source is used for providing the incident light for the transmitting optical fiber TF of the optical fiber probe. The output end of the optical fiber probe is connected with the collection processing and display module through the photoelectric conversion and filtering amplification module. The sensor achieves the detection of the temperature of oil while achieving the detection of the thickness of the lubricating oil film, and achieves the temperature compensation of a thickness detection result of the oil.

Description

technical field [0001] The invention belongs to the technical field of sliding bearings, in particular to an optical fiber sensor capable of simultaneously detecting the thickness and temperature of lubricating oil films of sliding bearings. Background technique [0002] Sliding bearings (including radial and axial) are the main supporting forms of rotors in major equipment such as nuclear power units, modern large-scale rolling mills, steam turbines, gas turbines, and water turbines. To ensure the sufficient lubrication of the micron-level small gap friction pair, at the same time, it must carry the weight of the rotor system of tens or even hundreds of tons and resist the influence of the internal self-excitation force and external disturbance force of the system. Among the many physical quantities that affect the tribological and rotordynamic performance of the rotor bearing system, the oil film thickness and temperature are the main parameters. Existing sensors cannot d...

AI Technical Summary

Problems solved by technology

Existing sensors cannot detect oil film thickness and temperature at the same time. To achieve thickness and temperature detection, different sensors need to be installed, which brings inconvenience to the installation of sensors.

At the same time, when the existing optical fiber sensor detects the thickness of the lubricating oil film, the change of the oil temperature during the working process will lead to a change in the refractive index of the oil, thus affecting the accuracy of the existing optical fiber sensor oil film thickness detection

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