All reciprocating systems have torsional vibration that is independent of balancing. At torsional resonant frequencies any excitation can result in large amplitudes of vibration. If a resonant frequency lands within the operating range, equipment damage is likely to result from the high vibration. For this reason the best approach is usually to tune the system so that the low-order resonant speed is below the minimum operating speed. Lo-Rez S-S soft couplings provide a high degree of torsional flexibility between the driving and driven halves of a system, resulting in a low natural frequency, as shown in Fig. 1 and 2.? Please, click on the image to expand Fig 1 and 2

It is necessary to understand the characteristics of a system in order to optimally tune it with the correct coupling. Lo-Rez offers customers the capability of torsional vibration analysis for this purpose.

T. W. Spaetgens, founder and president of Lo-Rez, is a pioneer in the field of torsional vibration analysis and has over 50 years of experience. Cases already handled include all manner of marine propulsion systems and configurations, seismic isolation of equipment, reciprocating compressor plants and other systems of rotating industrial equipment. A proprietary computer program has been developed at Lo-Rez for complex analysis, allowing an accurate prediction of system performance.

In addition to torsional vibration analyses, solid body dynamics and other vibration capabilities are available in-house. For upgrades to existing systems, Lo-Rez personnel are available for instrumentation work in the field, allowing a correlation of test results with analytical studies.