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Engineering Group Research Article Article ID: igmin173

Investigation of Lateral Vibrations in Turbine-generator Unit 5 of the Inga 2 Hydroelectric Power Plant

Power Engineering Mechanical EngineeringIndustrial EngineeringDynamics
André Mampuya Nzita * 1 ,
Edmond Phuku Phuati 2 ,
Robert Muanda Ngimbi 2 ,
Guyh Dituba Ngoma 3 and
Nathanaël Masiala Mavungu 1
Affiliation

Affiliation

    President Joseph Kasa-Vubu University, Department of Electromechanical Engineering, Polytechnic Faculty, Boma, Kongo Central, DR Congo

    President Joseph Kasa-Vubu University, Department of Electromechanical Engineering, Polytechnic Faculty, Boma, Kongo Central, DR Congo

    University of Kinshasa, Department of Physics, Faculty of Science and Technology, Kinshasa, DR Congo

    University of Kinshasa, Department of Physics, Faculty of Science and Technology, Kinshasa, DR Congo

    University of Quebec in Abitibi-Témiscamingue, School of Engineering, Rouyn-Noranda, Canada

    President Joseph Kasa-Vubu University, Department of Electromechanical Engineering, Polytechnic Faculty, Boma, Kongo Central, DR Congo

DOI10.61927/igmin173 Fulltext HTML Fulltext PDF Cite this article
DOI10.61927/igmin173 Fulltext HTML Fulltext PDF Cite this article

Abstract

The article presents a case study on the Investigation of lateral vibrations in the turbine-generator unit 5 of the Inga 2 hydroelectric power plant in the Democratic Republic of the Congo. Lateral vibrations were experimentally determined using twelve proximity and eddy-current probes, positioned on each measurement plane. The results were analyzed using the Dasylab and R software. Hence, it was observed that the vibration amplitudes of the upper guide bearing, lower guide bearing, and pivot/rotor exceeded acceptable or critical limit values of the international vibration standard for a rotating speed between 100-250 rpm. These excesses can lead to rotor mass imbalances, the eccentricity of the rotor axis relative to the rotation axis of the shaft, and the deformation of the coupling shaft between the upper rotor shaft and the turbine rotor shaft. Subsequently, the means and the variances of the vibration amplitudes were evaluated and compared to the reference values of the international standard. The results of the compliance analysis revealed statistically significant differences between the measured amplitudes and the reference values. Thus, it indicates deviations from international specifications.

Figures

Sensor location on each measurement plane [16]. Figure 1: Sensor location on each measurement plane [16]....
Shaft lines along the upstream-downstream axis. Figure 2: Shaft lines along the upstream-downstream axis....
Shaft lines along the left bank-right bank axis. Figure 3: Shaft lines along the left bank-right bank axis....
Evolution (cloud) of the overall (peak-to-peak) displacement values for the last two tart-ups (06/07). Figure 4: Evolution (cloud) of the overall (peak-to-peak) di...

References

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