Static and Dynamic Analysis of the Closing Rotor Balancing Device of the Multistage Centrifugal Pump

Pavlenko, Ivan

doi:10.4028/www.scientific.net/amm.630.248

Cited by 33 publications

(9 citation statements)

References 2 publications

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“…It should be additionally noted that the proposed approach has significant prospects for further development under the conditions of its comprehensive implementation with the systems of computational intelligence, particularly to identify the parameters of the above-mentioned mathematical models and the related regression dependencies with the use of artificial neural networks, as was previously realized within the research works [31][32][33][34]. Moreover, in further research, special attention should be paid to demonstrate benefits of the proposed designs of the air distribution device in terms of the air diffusion performance index, using the approach presented in the research [35].…”

Section: Discussionmentioning

confidence: 93%

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

et al. 2019

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The article is focused on the comprehensive analysis of the aerodynamics of air distribution devices with the combined heat and mass exchange, with the aim to improve the following hydro- and thermodynamic parameters of ventilation systems: flow rate, air velocity, hydraulic losses, and temperature. The inadequacy of the previously obtained characteristics has confirmed the need for more rational designs of air distribution systems. Consequently, the use of perforated plates was proposed to increase hydraulic losses for reducing the average velocity and ensuring a uniform distribution of the velocity field on the outlet of the device. The effectiveness of one of the five possible designs usage is confirmed by the results of numerical simulation. The coefficient of hydraulic losses decreased by 2.5–3.0 times, as well as the uniformity of the outlet velocity field for the air flow being provided. Based on the three-factor factorial experiment, the linear mathematical model was obtained for determining the dependence of the average velocity on the flow rate, plate’s area, and diameter of holes. This model was significantly improved using the multiparameter quasi-linear regression analysis. As a result, the nonlinear mathematical models were obtained, allowing the analytical determination of the hydraulic losses and average velocity of the air flow. Additionally, the dependencies for determining the relative error of measuring the average velocity were obtained.

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Section: Discussionmentioning

confidence: 93%

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

et al. 2019

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“…The system of differential equations describing rotor dynamics can be transformed to the following matrix equation [34]:…”

Section:  Dynamic Analysis Of the Centrifugal Machine's Rotormentioning

confidence: 99%

Parameter Identification of Hydro-Mechanical Processes Using Artificial Intelligence Systems

2019

IJOMAM

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The article is aimed at developing the comprehensive approach of parameter identification of complicated hydro-mechanical system by means of artificial intelligence systems (AIS) using artificial neural networks (ANN) and genetic algorithms (GA). The scientific novelty of the proposed method is inconsequent implementation of numerical analysis approach (e. g., FEM and CFD simulations), mathematical modeling of hydro-mechanical processes using the quasilinear regression procedure (QLRP), and artificial intelligence systems. Algorithms and related design schemes for implementation of the abovementioned technique are proposed for solving the interdisciplinary problems of aero-elastic interaction of gas-dispersed flow with the previously deformed flexible plates in a separation channel, static calculations of fixtures for parts manufacturing, as well as dynamic analysis of centrifugal compressors' rotors. All the presented has a significant advantage in comparison with the direct solving of the abovementioned problems. This advantage is in the ability of the comprehensive sequence "FEM / CFD-ANN / GA-QLRP" to predict the solutions of highly nonlinear mathematical models describing hydro-mechanical processes with uncertainties. As a result, unknown parameters of the mathematical models describing the complicated hydro-mechanical interactions are refined under an incompleteness of the initial data.

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“…Application of the numerical simulation for static and dynamic analysis of the automatic axial-balancing device of the rotor for multistage centrifugal pumps, and new design of balancing disc are presented in papers [7]. General approach for dynamic analysis of the rotor supported on ball bearings using two-and three-dimensional finite element models is presented in work [8].…”

Section: Literature Reviewmentioning

confidence: 99%

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

Pavlenko

Trojanowska

Gusak

et al. 2018

Period. Polytech. Mech. Eng.

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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.

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Static and Dynamic Analysis of the Closing Rotor Balancing Device of the Multistage Centrifugal Pump

Cited by 33 publications

References 2 publications

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

Parameter Identification of Hydro-Mechanical Processes Using Artificial Intelligence Systems

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

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