S.S. Shevchenko, A.S. Shevchenko

Èlektron. model. 2021, 43(1):03-16


Groove seals, in addition to their main purpose, which is to limit the crossflows between cavities with different pressures, can be used as rotor supports. An example of the use of groove seals as supports are shaftless pumps. A model of a shaftless pump has been constructed, demonstrating its advantages, which are the absence of contacts between a rotating impeller and a stationary casing. The static and flow characteristics of the pump with seals-bearings has been built. An analysis of the dynamics of a shaftless cradle-mounted pump with a combined support-balancing and sealing unit was carried out, which showed that the pump has a sufficient margin of vibration reliability.


seals-bearings, shaftless pump, static computation, vibration characteristics.


  1. Gorovoy, S.A. (1996), “Development and research of designs of shaftless centrifugal pumps”, Proceedings of the VIII International Sci. conf. PUMPS-96, Vol. 2, pp. 232-241, Sumy, Rizocentr SSU.
  2. Kundera, Cz. and Martsinkovsky, V.А. (2014), “Static and dynamic analysis of a pump impeller with a balancing device. Part 1: Static analysis”, J. of Applied Mechanics and Engineering, Vol. 19, No. 3, pp. 609-619.
  3. Jędral, W. (2001), Pompy wirowe [Rotodynamic Pumps], Wydawnictwo Naukowe PWN, Warsaw, Poland.
  4. Martsinkovsky, V.A. (1980), Beskontaktnyye uplotneniya rotornykh mashin [Non-contact seals for rotary machines], Mashinostroyeniye, Moscow, USSR.
  5. Martsinkovsky, V.A. and Shevchenko, S.S. (2018), Nasosy atomnykh elektrostantsiy: raschet, konstruirovaniye, ekspluatatsiya [Pumps of nuclear power plants: calculation, design, operation], Universitetskaya kniga, Sumy, Ukraine.
  6. Marcinkowski, W. and Kundera, Cz. (2008), Teoria konstrukcji uszczelnien bezstykowych [Theoryof constructionof noncontact sealing], Wyd-wo Politechniki Swiętokrzyskiej, Kielce, Poland.
  7. Martsinkovsky, V., Zhulyov, A. and Kundera, Cz. (2014), “Static and dynamic analysis of a pump impeller with a balancing device. Part 11: Dynamic analysis”, J. of Applied Mechanics and Engineering, Vol. 19, No. 3, pp. 621-631.
  8. Marcinkowski, W. and Korczak, A. (2004), “Szczeliny tarczy odciążającej napór osiowy i ich wplyw na dynamikę zespolu wirującego pompy odśrodkowej wielostopniowej”, X Int. Conf. Seals and Sealing Technology in Machines and Devices, Wroclaw, SIMP, 2004, рp. 318-328.
  9. Gudkow, S., Marcinkowski, W., Korczak, A. and Kundera, Cz. (2013), “Pompa odśrodkowa z wirnikiem łożyskowanym w szczelinach uszczelniających”, X1II Int. ScientificTechnical Conference. Seals and Sealing Technology of Machines and Dewices, Wroclaw, SIMP, pp. 178-187.
  10. Martsinkovsky, V.A. (2012), Dinamika rotorov tsentrobezhnykh mashin [Dynamics of rotors of centrifugal machines], Izdatelstvo SumGU, Sumy, Ukraine.

Full text: PDF