Dynamic movement

Despite the best efforts to precisely align rotating machinery shafts, Dynamic Movement (mostly manifested by the thermal growth of the machine casings) has resulted in machines operating at less than optimum alignment conditions. This paper addresses this vexing problem and points to the need to measure the actual position of machinery. Calculations of anticipated growth are a good starting point. This paper will cover some fundamentals of precision alignment, as well as the methodology for calculating thermal growth, then discuss and demonstrate the importance of field measurements of actual on-line positions.

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