The influence of the uneven distribution of deposits in the flow part of the centrifugal blower on the precession of its rotor

About the authors:

Mikhail S. Stepanov, Senior Lecturer, Department of Gas and Oil Transportation Systems and Equipment of the Oil and Gas Industry, Institute of Oil, Gas and Power Engineering, Kuban State Technological University, Krasnodar, Russia; m.s.stepanov@mail.ru, https://orcid.org/0000-0002-0513-2681

Alexey V. Bunyakin, Cand. Sci. (Phys.-Math.), Associate Professor, Department of Mathematical and Computer Methods, Faculty of Computer Technology and Applied Mathematics, Kuban State University, Krasnodar, Russia; alex.bunyakin@mail.ru, https://orcid.org/0000-0002-1849-1667

Gani G. Gilaev, Dr. Sci. (Tech.), Professor, Head of the Department of Oil and Gas named after Professor G. T. Vartumyan, Director of the Institute of Oil, Gas and Power Engineering, Kuban State Technological University, Krasnodar, Russia; gggilaev@gmail.com, https://orcid.org/0000-0001-9461-1512

Vladislav I. Dunaev, Dr. Sci. (Phys.-Math.), Professor, Department of Gas and Oil Transportation Systems and Equipment of the Oil and Gas Industry, Institute of Oil, Gas and Power Engineering, Kuban State Technological University, Krasnodar, Russia; dunayev1964@bk.ru, https://orcid.org/0000-0002-4166-6808

Abstract:

This article considers a dynamic precession model of the shaft in a centrifugal supercharger of a gas pumping unit with two compression stages and sliding bearings. Precession is characterized by the trajectory of the shaft floating on one of the supporting bearing units or on two nodes synchronously. The authors have assessed the imbalance force resulting from uneven deposits at two compression stages (two impellers of natural gas supercharger). The calculated characteristics are compared with the measurement data on the gas pumping unit during its operation. This article provides analytical expressions for estimating the force causing the precession of the shaft and creating its imbalance. The results can be used to diagnose the presence of deposits on the impellers of the supercharger.

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