Research on Improving Seals to Suppress Vibration of Rotary Machines

Authors

  • Lu Congxiang Yancheng Polytechnic College, China
  • Serhii Shevchenko Pukhov Institute for Modelling in Energy Engineering, Ukraine
  • Volodymyr Geichuk National Technical University of Ukraine “Kyiv Polytechnic Institute”
  • Mykola Korchak Higher Educational Institution “Podillia State University”, Ukraine
  • Andrii Topalov Admiral Makarov National University of Shipbuilding, Ukraine

DOI:

https://doi.org/10.7546/CRABS.2024.06.11

Keywords:

impulse seals, groove seals, auto unloading device, sealssupports, mathematical model, radial-angular vibrations, frequency characteristics

Abstract

There is a constant demand for higher equipment parameters, such as pressure of a sealing medium and shaft rotation speed. However, as the parameters rise it becomes more difficult to ensure hermetization efficiency. Moreover, sealing systems affect the overall operational safety of the equipment, especially vibratory. Non-contact seals are considered  hydrostatodynamic supports that can effectively damp rotor oscillations. Models of an impulse and a groove seals, models of rotor-seals system and rotor-auto-unloading system, models of a shaftless pump are studied to evaluate the effect of these sealing systems on oscillatory characteristics of rotor. Analytical dependencies for computation the dynamic characteristics of impulse seals, hydromechanical systems rotor-seals and rotor-auto-unloading, as well as shaftless pumps are obtained. These dependencies describe the radial-angular vibrations of a centrifugal machine rotor in seals-supports. Equations for computation the amplitude-frequency characteristics are given. The directions of improving the  environmental safety of critical pumping equipment by purposefully increasing the rigidity of non-contact seals that leads to higher rotor vibration stability have been determined.

Author Biographies

Lu Congxiang, Yancheng Polytechnic College, China

Mailing Address:
School of Intelligent Manufacturing,
Yancheng Polytechnic College,
224005 Yancheng, China

Email: lucongxiang@126.com

Serhii Shevchenko, Pukhov Institute for Modelling in Energy Engineering, Ukraine

Mailing Address:
Department of Simulation of Energy Processes and Systems,
Pukhov Institute for Modelling in Energy Engineering,
03164 Kyiv, Ukraine

Email: shevchenkoss@nas.gov.ua

Volodymyr Geichuk, National Technical University of Ukraine “Kyiv Polytechnic Institute”

Mailing Address:
Science Department,
National Technical University of Ukraine
“Kyiv Polytechnic Institute”,
03056 Kyiv, Ukraine

Email: poroshinv@gmail.com

Mykola Korchak, Higher Educational Institution “Podillia State University”, Ukraine

Mailing Address:
Department of Agricultural Engineering and Systems Engineering
Names Mykhaila Samokisha,
Higher Educational Institution “Podillia State University”,
32316 Kamianets-Podilskyi, Ukraine

Email: nikolaykorchak@gmail.com

Andrii Topalov, Admiral Makarov National University of Shipbuilding, Ukraine

Mailing Address:
Department of Computerized Control Systems,
Admiral Makarov National University of Shipbuilding,
54025 Mykolaiv, Ukraine

Email: topalov_ua@ukr.net

Downloads

Published

30-06-2024

How to Cite

[1]
C. Lu, S. Shevchenko, V. Geichuk, M. Korchak, and A. Topalov, “Research on Improving Seals to Suppress Vibration of Rotary Machines”, C. R. Acad. Bulg. Sci. , vol. 77, no. 6, pp. 881–891, Jun. 2024.

Issue

Section

Engineering Sciences