The results of comparative laboratory tests of spring and silicone torsional vibration dampers

The relevance of this study is due to the critical dependence of the domestic marine engine industry on imported torsional vibration damping technologies, exacerbated by the cessation of supplies and maintenance of foreign spring and silicone dampers. The creation of domestic dampers is of particular importance in the light of the tasks of technological sovereignty of the Russian state. Comparative laboratory tests of spring and silicone dampers were carried out to quantify the effectiveness of damping torsional vibrations. A silicone damper and a prototype of a spring damper developed on the basis of the author's creation methodology using reverse engineering technology of a serial sample of a spring damper model D90/37 from Geislinger are being investigated. The criterion of effectiveness was a decrease in the amplitude of torsional vibrations, estimated by the magnitude of stresses in the shafts of the laboratory stand, depending on the frequency of forced vibrations and the frequency of rotation of the stand. It was found that in the range of stand rotation frequencies up to 250 min–1, the efficiency of the dampers is comparable (voltage reduction by 2.3-3.5 times for non-resonant and up to 9.7 times for resonant vibrations). At a frequency of over 250 min–1, the prototype spring damper is more efficient, reducing the voltage amplitudes by 1.8 times compared to 1.4 times for a silicone damper. The most dangerous defects were identified: for the prototype spring damper, the leaf springs were blocked, leading to a 4-fold increase in stresses; for the silicone one, the flywheel mass was blocked, causing a 2.8-fold increase in stresses. The obtained results can be used in the creation of domestic analogues of dampers and the development of a technique for non-selective diagnostics of their technical condition.