Mathematical modelling of dynamic system rotor — groove seals

S.S. Shevchenko, PhD in Technical Sciences
Pukhov Institute for Modelling in Energy Engineering
of the National Academy of Sciences of Ukraine
15, General Naumov Str. Kiev, 03164, Ukraine
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.s

Èlektron. model. 2021, 43(3):17-35
https://doi.org/10.15407/emodel.43.03.017

ABSTRACT

Groove seals are considered as hydrostatic bearings that capable of effectively damping rotor vibrations. In order to determine the dynamic characteristics, a model of the rotor–groove seals system is considered. The radial forces and moments in groove seals had been estimated. Expressions of joint radial-angular rotor vibrations in groove seals had been obtained. Formulas had been proposed for constructing amplitude and phase frequency characteristics. An example of calculating the dynamic characteristics of a centrifugal machine rotor model is given.

KEYWORDS

seals-bearings, radial-angular oscillations, frequency characteristics.

REFERENCES

  1. Martsynkivskyi, V.A. and Shevchenko, S.S. (2018, Nasosy atomnykh elektrostantsiy. Raschet. Konstruirovaniye. Ekspluatatsiya [Pumps of nuclear power plants: calculation, design, operation], Izd-vo «Universitetskaya kniga», Sumy, Ukraine.
  2. Korchak, A., Martsynovskyi, V.A., Churylova V.E. (2003), “Static calculation of angular-contact hydrostatic self-adjusting bearings”, Visnyk Tekhnolohichnoho universytetu Podillya, Vol. 1, no. 1, pp. 196-201.
  3. Martsynovskyi, V.A. (2005), Shchelevyye uplotneniya: teoriya i praktika [Groove seals: theory and practice], Izd-vo Sumskogo univesiteta, Sumy, Ukraine.
  4. Martsynovskyi, V.A. (1995), “Radial-angular oscillations of the centrifugal machine rotor in the groove bearings-seals”, Zeszyty naukowe politechniki Swiętokrzyskiej, pp. 247-259.
  5. Tymoshenko, S.P., Yang, D.Kh. and Uiver, U. (1985), Kolebaniya v inzhenernom dele [Oscillations in engineering], Mashinostroyeniye, Moscow, USSR.
  6. Korczak, A., Marcinkowski, W. and Peczkis, G. (2007), “Wpływ szczelin uszczel­niają­cych na dynamikę zespołu wirującego pompy odśrodkowej”, Politechnika śląska. Prace naukowe, Vol. 18, pp. 161-170.
  7. Kundera, Cz. and Marcinkowski, W. (2010), “The effect of the annular seal parameters on the dynamics of the rotor system”, Journal of Applied Mechanics and Engineering, Vol. 15, no 3, pp. 719-730.
  8. Marcinkowski W. and Kundera Cz. (2008), Teoria konstrukcji uszczelnien bezstykowych [The theory of construction of non-contact seals], Wyd-wo Politechniki Swiętokrzyskiej, Kielce, Poland.
  9. Yamamoto Т. and Ishida Y. (2001), Linear and nonlinear rotor dynamics. A modern treatment with applications, John Willey&Sons, New York, USA.
  10. Martsynovskyi, V.A. (2012), Dinamika rotorov tsentrobezhnykh mashin [Dynamics of the centrifugal machine rotors], Izd-vo Sumskogo univesiteta, Sumy, Ukraine.

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