Steel spring couplings for applications such as drive lines, gear drives etc. are installed between two shafts to transmit torque from one shaft to another while influencing the torsional vibrations and accommodating misalignments between the shafts. The main focus is to control the torsional vibrations both by moving the critical resonances out of the operating speed range and damping the remaining vibrations to acceptable levels. The market offers various coupling designs, one of them is the Geislinger Steel Spring Coupling. The stiffness of the coupling leaf springs can be precisely tuned to isolate or move harmful natural resonance frequencies. In addition Geislinger Couplings provide a unique hydrodynamic damping via oil displacement, which effectively absorbs torsional vibrations. The Steel Spring Coupling concept meets not only the demands of any type and size of internal combustion engine, but also the demands of a variety of other machinery systems. Applications for pumps and compressors are typical ones. This paper will present design features, analysis parameters as well as examples of actual applications in order to show how the coupling design is able to meet the torsional requirements.

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