Dynamic measurement method of slide bearing lubricating film and fiber optic sensor for measurement

Abstract

The invention discloses a dynamic measuring method of lubricating films of a sliding bearing, and an optical fiber sensor that is used for measurement. Two reflection-typed optical fiber sensors with coaxial double loops that form a right angle are respectively arranged at the two end faces of a bearing bush of the sliding bearing, two distances from A to A' and from B to B' are directly measured, the coordinates of the two points A' and B' that are obtained by measurement and calculation are substituted into a standard circle equation of a shaft neck so as to calculate the values of x and y of a cross section circle of the shaft neck, and consequently, the eccentric offset of the shaft neck, the smallest oil film thickness h<min>, the position angle of the smallest oil film thickness Theta<min> and the thickness of the oil films on any point along the circumferential direction of the sliding bearing h(Theta) are obtained in order; in order to implement subsequent failure diagnosis, the multi-dimensional features of the lubricating films of the sliding bearing are represented and extracted. The optical fiber sensor that is used in the dynamic measuring method comprises an optical fiber probe, an incident optical fiber and a receiving optical fiber beam, and is characterized in that two loops of receiving optical fiber beams including an inner loop and an outer loop are arranged closely and coaxially surrounding the incident optical fiber.

Description

technical field [0001] The invention relates to a dynamic measurement method of a lubricating film of a sliding bearing and an optical fiber sensor for measurement. Background technique [0002] High-speed hydrodynamic sliding bearings are widely used in high-speed machine tools, high-speed centrifuges, steam turbine generator sets, large-scale mechanical equipment in steel and chemical complexes. As a key basic component, sliding bearing is not only an important supporting part of these key equipment, but also a key friction pair to ensure its complete rotational motion, and plays a vital role in the normal operation of the equipment. The state of the lubricating film of the sliding bearing reflects the operating state of the equipment to a large extent. As early as the 1970s and 1980s, people have effectively monitored parameters such as the pressure distribution of the lubricating oil film and the temperature of the inlet and outlet of the lubricating oil. Online analys...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of optical fiber dynamic measurement method and optical fiber sensor for the multi-dimensional characteristic of sliding bearing lubricating film, this method can solve the complex structure of the sensor caused by the tangent equation determined by the shading method in the background technology, the measurement cost is too high, and it is practical Issues such as weak sex

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