High Speed Balancing Procedures
Abstract
The paper describes elastic balancing procedures and experimental results for turbomachine rotors. The commonly known criteria of static and dynamic balancing no longer apply in this case. The rotating elements are balanced at full speed in their contract bearings. Dynamic bearing forces are measured with respect to direction and magnitude. Balancing weights are attached to the rotor in several planes and the thermally caused deflections, nonsynchronous vibrations and natural frequencies of bearing supports have to be accounted for. The rotor sensitivity can be determined by attachment of test unbalances. Dynamic bearing forces and shaft vibrations are measured and the shock excitations and log decrement calculations yield the stability limits.
Description
LectureSubject
TurbomachinesCollections
Citation
Ehrich, Robert (1980). High Speed Balancing Procedures. Texas A&M University. Gas Turbine Laboratories. Available electronically from https : / /hdl .handle .net /1969 .1 /163747.