Dynamics DYSTIFF s.r.o., Olomouc. Vertical pump - Variable speed of rotation - High level of vibration - Two eigenfrequencies in speed range.

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Presentation transcript:

Dynamics DYSTIFF s.r.o., Olomouc

Vertical pump - Variable speed of rotation - High level of vibration - Two eigenfrequencies in speed range

Calculation model of the original design

Harmonic response

Eigenmode

Wrong solution

Recommended design

Harmonic response of modified design

Eigenmode

Elastic rotor of long vertical pump - Water lubricated rubber bearings - Long segmented rotor - Modal analysis - Harmonic excitation - Start up state

Calculation model of elastic rotor

First eigenmode of rotor

Response spectra of harmonic excited rotor

Response of staring up rotor

High pressure water station - Plunger pumps with hydraulics dampers (resonators) - High level of vibrations - Failure of connecting flanges

Schema of station

Calculation model of one damper

Shape of vibration

Stress intensity in the resonator support

Submodel of flange connection to the pump

Stress intensity amplitude in the flange during one period

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