SHIP POWER PLANTS AND THEIR ELEMENTS (MAIN AND AUXILIARY)

Original article

https://doi.org/10.24866/2227-6858/2024-4/75-89

Nityagovsky A.V., Gribinichenko M.V., Lapin Yu.A., Hannanov A.M.

Andrei V. Nityagovkiy, Head of the Department, JSC «Atomenergomash» (Moscow, Russian Federation), AVNityagovsky@aem-group.ru

Matvey V. Gribinichenko, Candidate of Engineering Sciences, Associate Professor, Director of the Department of Mechanical Engineering of Marine Equipment and Transport of Polytechnic Institute, Far Eastern Federal University (Vladivostok, Russian Federation), gribinichenko.mv@dvfu.ru, SPIN: 8038-4960

Yuriy A. Lapin, Postgraduate Student, Far Eastern Federal University (Vladivostok, Russian Federation), lapin.iua@dvfu.ru, SPIN: 2511-6398

Andrey M. Hannanov, Candidate of Engineering Sciences, Associate Professor of the Department of Mechanical Engineering of Marine Equipment and Transport, Far Eastern Federal University (Vladivostok, Russian Federation), hannanov.am@dvfu.ru, SPIN: 5116-6352

The influence of the parameters of hybrid gas bearings of marine turbogenerators on the change in the critical frequencies of the rotor rotating in them

Abstract. The article considers a numerical study of the “rotor – gas hybrid bearings” system critical frequencies when changing the bearings gas dynamic parameter. The change in the system critical frequency the was studied when varying the wedge-shaped section relative length, the wedge-shaped uniform sections number, the wedge-shaped sections relative maximum depth and the compressibility number. The study results are presented in the graphical dependencies form. Based on the results obtained, recommendations have been made for changing the critical frequencies of the “rotor – hybrid gas bearings” system with a small change in bearing load capacity. The results obtained make it possible to increase the critical frequencies calculations accuracy of turbomachinery on gas hybrid bearings and increase their operational reliability.

Keywords: hybrid gas bearings, rotordynamics, critical frequencies, free vibrations, numerical study

See the reference in English at the end of the article

For citation: Nityagovsky A.V., Gribinichenko M.V., Lapin Yu.A., Hannanov A.M. The influence of the parameters of hybrid gas bearings of marine turbogenerators on the change in the critical frequencies of the rotor rotating in them. FEFU: School of Engineering Bulletin, 2024, no. 4(61), pp. 75–89. (In Russ.).