Fig 4 - uploaded by Davorka Šaravanja
Content may be subject to copyright.
Source publication
This paper presents research on vibration parameters and comparison of vibration amplitude testing before and after overhaul of a hydro unit. The vibration test program is based on the international standards ISO 7919:5(2005) and ISO 10816:5(2000), which evaluate the vibration of the machine by measurements at the appropriate positions of the rotat...
Contexts in source publication
Context 1
... displacement μm, p-p Perfomance ratings A-Good <1,6 <30 B-usable 1,6-2,5 30-50 C-Admitted under supervision 2,5-4 50-80 D-not allowed >4 >80 Tables 3. and 4. is presented in graphs showing the change of peak-peak values of vibration displacements (μm) according to different operating modes of hydroaggregates at measuring positions ( Fig. 4a) and change of effective values of vibration velocity in (mm/s) in all directions in relation to the measuring positions at the maximum load of the hydroaggregate (Fig. 4b). ...
Context 2
... is presented in graphs showing the change of peak-peak values of vibration displacements (μm) according to different operating modes of hydroaggregates at measuring positions ( Fig. 4a) and change of effective values of vibration velocity in (mm/s) in all directions in relation to the measuring positions at the maximum load of the hydroaggregate (Fig. 4b). ...
