Methods and Algorithms for Calculating Nonlinear Oscillations of Rotor Systems

Simonovskiy, V.; Pavlenko, Ivan; Piteľ, Ján; Stremoukhov, Denys; Ivanov, Vitalii

doi:10.1007/978-3-030-77823-1_7

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…Meanwhile, the pulsating amplitude of the closed impeller at the dominant frequency is smaller than that of the other two impellers Furthermore, the rotor vibration stability is less affected by the motor vibration, and more affected by the rotor centering problem between the pump and the motor. Simonovskiy et al (2021) introduced the method of linear and nonlinear parameter identification for vibration mathematical models of centrifugal pumps and turbocharger rotors to ensure vibration reliability of the centrifuge rotor system. As an example of using the proposed methodology, the analysis of forced oscillations and stability of the rotor's rotation of a centrifugal compressor for underground gas storage with 25 MW power is considered.…”

Section: Vibration Characteristicsmentioning

confidence: 99%

Experimental Study on Operational Stability of Centrifugal Pumps of Varying Impeller Types Based on External Characteristic, Pressure Pulsation and Vibration Characteristic Tests

et al. 2022

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This study performed external characteristics, dynamic pressure, and vibration tests on the closed impeller model, semi-open type impeller model, and open impeller model in order to study the influence of the impeller structure on the operational stability of the pump. According to the research findings, the external characteristics of the three impellers enjoyed favorable stability with flat curves under low flow rates. As the flow increases, the stability of the external characteristics weakens, and the poorest stability can be observed in the open impeller, while the enclosed impeller has the best stability under a large flow rate. In addition, intense pressure fluctuations arise near the casing tongue due to the dynamic and static interference between the blade and the casing tongue, causing a large amplitude of pressure pulsation near the casing tongue and the pump outlet. It can be seen that the stability of pressure pulsation of the closed impeller in the casing tongue area was the best, whereas the stability of pressure pulsation of the open impeller was the poorest. The minimum casing vibration can be found in the closed impeller, followed by the semi-open impeller, and the open impeller, with the maximum vibration. In addition, the optimum stability of rotor vibration can be observed in the closed impeller, semi-open impeller, and open impeller with similar stability of rotor vibration.

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Section: Vibration Characteristicsmentioning

confidence: 99%