Estimation of the Reliability of Automatic Axial-balancing Devices for Multistage Centrifugal Pumps

  • Ivan Pavlenko Department of General Mechanics and Machine Dynamics, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2 Rymskogo-Korsakova St., Sumy, 40007, Ukraine http://orcid.org/0000-0002-6136-1040
  • Justyna Trojanowska Department of Management and Production Engineering, Faculty of Mechanical Engineering and Management, Poznan University of Technology, 5 M. Sklodowska-Curie Sq., Poznan, 60965, Poland http://orcid.org/0000-0001-5598-3807
  • Oleksandr Gusak Department of Applied Hydro- and Aeromechanics, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2 Rymskogo-Korsakova St., Sumy, 40007, Ukraine
  • Vitalii Ivanov Department of Manufacturing Engineering, Machines and Tools, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2 Rymskogo-Korsakova St., Sumy, 40007, Ukraine http://orcid.org/0000-0003-0595-2660
  • Jan Pitel Department of Industrial Engineering and Informatics, Faculty of Manufacturing Technologies with a seat in Presov, Technical University of Kosice, 1 Bayerova St., Presov, 08001, Slovak Republic
  • Vita Pavlenko Machine-building College of Sumy State University, 17 Shevchenka Ave., Sumy, 40000, Ukraine

Abstract

The permanent increase of operating parameters of modern multistage centrifugal pumps requires more precise modelling for estimation their dynamic reliability and needs to develop new approach and methodology for the related calculations. It is necessary to change the approach assuming empirical coefficients to another one based on the probabilistic design for analysis of reliability for pumps and their nodes. In this case, the probabilistic parameters of the design features and fluid flow are significant for the calculation (e. g. geometry of gap seals, boundary conditions, material properties) and should be considered. The automatic axial-balancing device of the rotor is one of the most important nodes of multi-stage centrifugal pumps. It operates as the balancing disc for the axial force up to 1 MN. This paper presents the methodology for the numerical calculation of the balancing disc and its influence on the reliability of multistage centrifugal pumps. The proposed approach is based on the criterion of the permissible amplitudes of axial oscillations of the rotor with the automatic axial-balancing device considering probabilistic origin of main geometrical, hydromechanical and operating parameters.

Keywords: erosion wear, axial oscillations, amplitude-frequency response, probabilistic calculation, mathematical expectation, probability density function
Published online
2018-12-13
How to Cite
Pavlenko, I., Trojanowska, J., Gusak, O., Ivanov, V., Pitel, J. and Pavlenko, V. (2019) “Estimation of the Reliability of Automatic Axial-balancing Devices for Multistage Centrifugal Pumps”, Periodica Polytechnica Mechanical Engineering, 63(1), pp. 52-56. doi: https://doi.org/10.3311/PPme.12801.
Section
Articles