Identification of the causes of increased vibrations in the high-power multi-stage rotodynamic pump
Institute of Fluid Flow Machinery, Polish Academy of Sciences
Group Powen-Wafapomp SA
Grzegorz Żywica   

Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Polska
Data nadesłania: 09-05-2018
Data ostatniej rewizji: 01-07-2018
Data akceptacji: 03-08-2018
Data publikacji online: 07-08-2018
Data publikacji: 07-08-2018
Diagnostyka 2018;19(3):81–88
The article discusses the vibrodiagnostic tests of a multi-stage high-power rotodynamic pump. The tested pump was operated as a feed water pump in an industrial combined heat and power plant. However, some time ago, its dynamic performance started to deteriorate. Therefore, diagnostic tests were carried out, the aim of which was to identify the reasons for the increased vibration level and to minimise it. The scope of the performed work included both the analysis of possible excitation forces originating from the flow system and measurements of the pump vibrations at different power levels. Additionally, at selected measuring points, vibration velocity spectra were registered and eigenfrequencies were determined. The analysis of the obtained results allowed to clearly identify the causes of dynamic problems and introduce changes that enable their elimination.
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