JUSTIFICATION OF THE CHARACTERISTICS OF DIAGNOSING OPERATIONAL INDICATORS OF TURBINE GENERATOR STANDOFF BEARINGS
DOI:
https://doi.org/10.32718/agroengineering2025.29.105-111Keywords:
turbogenerator, standoff bearing, diagnostic feature, entropy, amount of information, working conditions, inoperable stateAbstract
A significant amount of research has focused on detecting and eliminating malfunctions in powerful turbogenerators (TG). One important aspect to consider is the impact of standoff bearings on the effective operation of the TG. Failures in these bearings are responsible for a substantial number of rotor accidents. Therefore, this work analyzes the information support necessary for diagnosing standoff bearings, which will aid in assessing their condition before any emergencies arise.
It is known that grease is supplied to the standoff bearings under pressure. During the operation of the TG, metal inclusions can enter the bearing grease, indicating deterioration in the surface condition of the bearing liners. Additionally, any alterations to the design of the TG bearing assembly may also be reflected by an increase in vibration. This vibration can provide further insight into the assembly's condition.
By examining the design features of TG bearings and the physical processes at play, we can deduce that information regarding the presence of metal inclusions in the lubricant, alongside the vibration levels of the TG standoff bearing, can be used to assess its condition. However, there is currently no objective assessment, in numerical form, demonstrating that these two diagnostic features are indeed effective for evaluating the state of TG standoff bearings.
This work aims to justify the information support for the procedure used to diagnose the condition of TG bearing assemblies. This can be achieved by calculating the amount of information that reflects the relationship between the chosen diagnostic features and the technical condition of the TG standoff bearings.
The information derived from inspections of the lubricant and vibration of the TG bearing stands indicates that both diagnostic features are informative concerning their condition. Notably, high levels of information regarding the inoperable state of the standoff bearings are obtained when inspections focus on these two parameters. Thus, it is the objective confirmation of the recommendation to inspect TG standoff bearings based on the condition of the lubricant and the magnitude of the housing vibration, represented in numerical terms.
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