Investigation of correlation in bearings’ vibrations of high-performance centrifugal pumps

Abstract

The article analyzes the reasons of increase in vibrations of four equal high-performance centrifugal pumps and their correlations in case of different working rotations. The influence of rigidity of bearings’ housing and rotors on the values of vibrations is analyzed. The results of the investigation on correlation in bearings’ vibrations of one of these pumps done earlier were used to check the objectivity in other pumps. The change in the correlations of vibrations is explained by different dynamic models in two characteristic ranges of working rotations. The uncertainty of the data measurement of these tests was analyzed and it was shown that the total uncertainty does not have essential impact on the values of vibrations and their changes used in the correlation investigation.