Advertisement

Estimation of Random Flow-Rate Characteristics of the Automatic Balancing Device Influence on Centrifugal Pump Efficiency

  • Yuliia TarasevychEmail author
  • Ievgen Savchenko
  • Nataliia Sovenko
Conference paper
  • 30 Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The main function of an automatic balancing device is to balance the axial force in multi-stage centrifugal pumps. The advantage of this method of axial force balancing is the self-regulation of the device parameters. This allows balancing the axial force at different pump operating modes. In classic designs, the static characteristic (dependence of the hydrodynamic axial force of the device on the face gap), as well as the flow rate characteristic of the balancing device, are substantially determined by the cylindrical gap geometry. A middle gap of the cylindrical throttle, as well as its conductivity, is a random function due to manufacturing tolerances and possible erosive wear of sealing surfaces under pump operation. The paper presents the method of calculating the flow rate characteristics of the device with the random changes in the middle gap during operation of the pump, as well as the influence of random changes in local hydraulic resistances and parameter taper of face gap. The analysis of the influence of each of the considered random factors is made. Probabilistic characteristics of the pump efficiency are determined.

Keywords

Cylindrical throttle Face throttle Flow-rate Axial force Probabilistic characteristics Pump efficiency 

References

  1. 1.
    Marcinkovskij, V., Shevchenko, S.: Pumps of Nuclear Power Plants: Calculation, Design, Operation: Monograph. University book, Sumy (2018). [in Russian]Google Scholar
  2. 2.
    Pak, P., Belousov, A., Belousov, A.: Pumping Equipment for Nuclear Power Plants. Energoatomizdat, Moscow (2003). [in Russian]Google Scholar
  3. 3.
    Czegurko, L.: Centrifugal energy pumps, their malfunctions and tuning methods, Chelyabinsk (2002) [in Russian]Google Scholar
  4. 4.
    Korczak, A.: Investigation of balancing systems of axial thrust in multistage centrifugal pumps, Ed. Silesian University of Technology, Gliwice (2005) [in Polish]Google Scholar
  5. 5.
    Korczak, A., Martsynkovskyy, V., Peczkis, G., Zahorulko, A.: Diagnosis of the phenomenon of flow as an inspiration to inventions in the domain of constructing hydraulic machines. Procedia Eng. 39, 286–302 (2012)CrossRefGoogle Scholar
  6. 6.
    Korczak, A., Papierski, A.: The flow through the face clearance of disk relieving the axial force in multi-stage centrifugal pump. Trans. Inst. Fluid-Flow Mach. N115, 125–142 (2004)Google Scholar
  7. 7.
    Verbovyi, A., Neamtu, C., Sieryk, M., Vashyst, B., Pavlenko, V., Simonovskiy, V., Pavlenko, I.: Ensuring the vibration reliability of rotors connected by spline joints. J. Eng. Sci. 6(2), D14–D19 (2019).  https://doi.org/10.21272/jes.2019.6(2).d3CrossRefGoogle Scholar
  8. 8.
    Jedral, W.: Turbulent fluid flow in hydraulically smooth transverse joints. Machine-building archive T. XXVIII, №1, pp. 39–53 (1981). [in Polish]Google Scholar
  9. 9.
    Jedral, W.: Methods for calculating longitudinal forces and unloading systems in vortex pumps, Scientific Works. Mechanics z 110, PW Publishing house (1988) [in Polish]Google Scholar
  10. 10.
    Karaskiewicz, K.: Investigation of Internal Flows in Pumps in Terms of Calculating Hydraulic Forces. Publishing house of the Warsaw University of Technology, Warsaw (2013). [in Polish]Google Scholar
  11. 11.
    Bolotin, V.V.: Methods of Probability Theory and Probability Theory in Calculations of Structures. Strojizdat, Moscow (1982). [in Russian]Google Scholar
  12. 12.
    Tarasevych, Y., Savchenko, I., Sovenko, N., Savchenko, A.: Research of influence of random change of annular seal parameters on efficiency of centrifugal pump. Eastern-Euro. J. Enterprise Technol. 6(7(84)), 37–42 (2016)CrossRefGoogle Scholar
  13. 13.
    Tarasevych, Y., Sovenko, N., Savchenko, I.: Influence of the stochastic nature parameters of throttle channels on characteristic of automatic balancing device of the centrifugal pump. In: Ivanov V., et al. (eds.) Advances in Design, Simulation and Manufacturing. DSMIE 2018. Lecture Notes in Mechanical Engineering. Springer, Cham (2019)Google Scholar
  14. 14.
    Tarasevych, Y., Sovenko, N.: Modeling the influence of cylindrical throttle erosion wear on characteristics of automatic balancing device. Tribologia 285(3), 107–113 (2019)CrossRefGoogle Scholar

Copyright information

© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.AGH University of Science and TechnologyKrakówPoland
  2. 2.Sumy State UniversitySumyUkraine

Personalised recommendations