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Determination of the friction moment in self-lubricating sliding bearings based on temperature data
https://doi.org/10.26896/1028-6861-2025-91-11-85-92
Abstract
Long-term and safe operation of complex mechanisms and aggregates requires timely diagnosis of friction units. The paper presents the results of determining the moment of friction in self-lubricating sliding bearings based on temperature data. A system of sliding bearings made of a polymer composite material supported by a rotating shaft was studed. A mathematical model of the thermal process in the system under consideration is given, taking into account the spatial distribution of temperature and its change over time. The temperature was recorded with thermocouples at several points of each bearing. The moment of friction was determined by frictional heat generation using a solution to the inverse problem of heat transfer (the condition is the proximity of measured and calculated temperatures). Temperature data with measurement errors were statistically processed. The refinement of the solution of the inverse problem was stopped when successive approximations converged. To ensure continuous data processing and determination of the moment of friction during long-term tests, the inverse problem of heat transfer was solved in consecutive short time intervals, then the solutions obtained were «glued together». It is shown that the discrepancy between the values of the total moment of the friction force obtained by calculation from temperature data and measurement by an inductive sensor does not exceed 15%. The proposed method of thermal diagnostics of friction can be used to determine the friction moments in self-lubricating sliding bearings under conditions of bench and operational tests of friction units of machines and mechanisms, as well as to increase the reliability of diagnostics of the technical condition of bearings.
About the Author
R. S. Tikhonov
Yakutsk Science Center, SB RAS
Russian Federation
Russian Federation
Roman S. Tikhonov
20, prosp. imeni Mikhaila Nikolaeva, Yakutsk, 677021
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Review
For citations:
Tikhonov R.S. Determination of the friction moment in self-lubricating sliding bearings based on temperature data. Industrial laboratory. Diagnostics of materials. 2025;91(11):85-92. (In Russ.) https://doi.org/10.26896/1028-6861-2025-91-11-85-92
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