PROCEDURE OF ROTOR BALANCING ADJUSTMENT
The article describes issues referring to rotor balancing adjustment (and its components) when balancing centrifugal compressor as a part of gascompressor unit. It was reviewed typical technologies of single-plane and high-speed balancing, main drawbacks of these procedures were determined. It was proposed alternative rotor balancing adjustment technique, which contains preliminary low-speed shaft balancing in four planes (and more), precision balancing rotor impellers in two planes, controlled mounting and multiplane rotor balancing with specified parameters of direction and distribution of residual disbalances. It was given the flow chart of the proposed algorithm for centrifugal compressor rotor mounting and balancing with indication of the main stages in rotor adaptative mounting technology. It was revealed that correction of rotor local disbalances in their locations ensures their dynamic stability in the whole operation range and can be achieved by: uniform mounting of preliminary balanced shaft elements, rotor balancing with diametrically opposite direction of disbalances relative to shaft bending direction and their distribution over several correction planes on mounted elements, rotor balancing with disbalances correction (diametrically opposite) in the planes of rotor cantilevers.