Abstract
According to the characteristics of the temperature distribution of the thrust sliding bearing bush, the principle and method of quasi-distributed fiber Bragg grating (FBG) sensing is used to measure it. The key problems such as calibration, arrangement and lying of optical FBG sensors are studied by using the simulated thrust sliding bearing bush, which was customized in the laboratory. Combined with the thrust sliding bearing bush, the measurement experiments were carried out, which were divided into two groups: Steady-state experiments and transient experiment. The steady-state experiments obtain the temperature data measured by the FBG temperature sensors at each setting temperature, and the transient experiment obtains the relationship between the measured temperature by each temperature sensor and time in the heating and cooling process. The experimental results showed that the FBG temperature sensors had good accuracy, stability and consistency when measuring the temperature distribution of bearing bush.
Highlights
When the thrust sliding bearing is working, a hydrodynamic pressure oil film can be formed between the thrust-bearing bush and the thrust collar to bear the axial load of rotating machinery such as the ship propeller shaft, water turbine and generator set [1]
The steady-state experiments obtain the temperature data measured by the fiber Bragg grating (FBG) temperature sensors at each setting temperature, and the transient experiment obtains the relationship between the measured temperature by each temperature sensor and time in the heating and cooling process
The preparation for the experiments was done, and the FBG temperature sensor, FBG interrogator, personal computer (PC) and heater power supply were connected in turn
Summary
When the thrust sliding bearing is working, a hydrodynamic pressure oil film can be formed between the thrust-bearing bush and the thrust collar to bear the axial load of rotating machinery such as the ship propeller shaft, water turbine and generator set [1]. With the development of all kinds of machinery towards the direction of many parameters, high power and flexibility, and the increasingly complex working environment, the axial thrust required by thrust sliding bearing is constantly increasing. It is of great significance to monitor the condition of thrust sliding bearing. In the process of application, there are many serious accidents caused by the failure of thrust sliding bearing. High temperature friction and deformation on the working surface of thrust sliding bearing bush caused bearing failure, such as the thrust sliding bearing of 3# and 4#
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