graduate student
Orel, Orel, Russian Federation
graduate student
Orel, Orel, Russian Federation
graduate student
Orel, Orel, Russian Federation
graduate student
Orel, Orel, Russian Federation
employee
Orel, Orel, Russian Federation
Russian Library and Bibliographic Classification 34
The study objective. The research is aimed at developing a technique for accurately predicting critical frequencies and assessing the stability of high-speed rotory systems supported by conical-cylindrical sliding bearings (CCSB), a promising technical solution for combined radial and axial loads. The key goal is to establish the relationship between the geometric and operational parameters of the bearing and the dynamic characteristics of the system. Study results. Based on the hydrodynamic model, an approach to determining the coefficients of stiffness and damping of the lubricating layer in CCSB is proposed and implemented. The obtained dynamic coefficients were integrated into the rotor model to perform modal analysis and stability analysis according to Routh-Hurwitz criterion. The calculation results made it possible to quantify the dependence of dynamic coefficients on operational parameters, identify the first critical frequencies, and construct diagrams of system stability. Conclusions. Based on the results of the study, recommendations are given on the choice of an optimal design and safe operation of rotors in turbomachines, taking into account the main requirements for the range of critical frequencies, the level of stability and the combined load capacity of CCSB.
speed, bearing, stability, coefficients, stiffness, Reynolds equation, Routh-Hurwitz criterion
1. Poznyak EL. Vibrations of rotors. In: Vibrations in engineering. Vibrations of machines, structures and their elements. Moscow: Mashinostroenie; 1980.
2. Lund JV. Development of the concept of dynamic coefficients of radial sliding bearings. Journal of lubrication technology. Transactions of the ASME. 1987;1:40-45.
3. Poddubny AI. On calculating the characteristics of conical hydrostatic bearings. Collection of Scientific Papers, 1975: Research and Design of Hydrostatic Supports and Seals of High-speed Machines; Kharkov: KHAI; 1975;2:125-128.
4. Maksimov VA, Batkis GS. Tribology of bearings and sliding seals of high-speed turbomachines. Kazan: FEN; 1998.
5. Rao JS. Dynamics of rotors has reached maturity. Proceedings of the Sixth International Conference on Dynamics of Rotors. Sydney (Australia): University of New South Wales; 2002;1:15-26.
6. Savin LA, Solomin OV, Korneev AYu. Certificate of official registration of the computer program No. 2000610593. Bearing Cryogen. 2000.
7. Korneev AYu, Savin LA, Solomin OV. Tapered sliding bearings: monograph. Moscow: Mashinostroenie-1; 2008.
8. Solomin OV, Korneev AYu. Dynamic characteristics of conical sliding bearings. Vestnik Mashinostroeniya. 2006;12:31-37.
9. Korneev AYu, Savin LA, Yaroslavtsev MM. Calculation of static characteristics of conical multiple-wedge hydrodynamic liquid friction bearers. Vestnik Mashinostroeniya. 2010;3:25-29.
10. Korneev AYu, Yaroslavtsev MM. Dynamic characteristics of conical multiline hydrodynamic sliding bearings. Russian Engineering Research. 2010;30(4):401-406.
11. Ivanov AV, Leontiev MK. Modal analysis of a dynamic rotary system. Izv. VUZ. Aviatsionnaya Tekhnika. 2005;3:31-35.
12. Li SB, Ao HR, Jiang HY, Korneev AYu, Savin LA. Stability of characteristics of tapered bearings with water lubrication. Journal of Donghua University. 2012;29(2):115-122.
13. Nguyen ThH. Effect of structural parameters on the formation of hydynamic pressure field in cylindrical-conial fluid bearings. Fundamental and Applied Problems of Technics and Technology. 2024;5(367):44-51.
14. Marakhin NA, Nguyen ThH, Liu Yi, Kazakov YuN, Savin LA. Hybrid fluid film bearings. Fundamental and Applied Problems of Technics and Technology. 2023;6(362):116-125.
15. Savin LA, Korneev AYu, Kazakov YuN. Natural frequencies of rotors with conical bearings of liquid friction. Fundamental and Applied Problems of Technics and Technology. 2022;2(352):153-159. DOIhttps://doi.org/10.33979/2073-7408-2022-352-2-153-159.
16. Nguyen ThH, Savin LA, Do Van Minh, Nguyen TH. Integral characteristics of tapered-cylindrical fluid friction bearings. Izvestiya Tula State University (Izvestiya TulGU). Technical Sciences. 2025;8:317-328. DOI:https://doi.org/10.24412/2071-6168-2025-8-317-318.
17. Nguyen T, Kazakov YuN, Shutin DV, Savin LA. Parametric synthesis of conical-cylindrical plain bearings. Transport Engineering. 2025;9:11-21. DOI: https://doi.org/10.30987/2782-5957-2025-9-11-21
18. Nguyen ThH, Kazakov YuN, Shutin DV, Savin LA. Dynamic characteristics of conical-cylindrical plain bearings. Fundamental and Applied Problems of Technics and Technology. 2025;5(373):74-83. DOI:https://doi.org/10.33979/2073-7408-2025-373-5-74-83.
