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.
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Tarasevych, Y., Savchenko, I., Sovenko, N. (2020). Estimation of Random Flow-Rate Characteristics of the Automatic Balancing Device Influence on Centrifugal Pump Efficiency. In: Ivanov, V., Pavlenko, I., Liaposhchenko, O., Machado, J., Edl, M. (eds) Advances in Design, Simulation and Manufacturing III. DSMIE 2020. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-50491-5_11
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DOI: https://doi.org/10.1007/978-3-030-50491-5_11
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