Why are Dampers fitted?
Internal combustion engine construction makes it susceptible to resonant torsional oscillation of the crankshaft. When it is operated near a critical speed [a speed at which the pulsations produced by each cylinder excite the natural frequency of the crankshaft] excessive torsional amplitudes are developed which may seriously damage the engine. The crankshaft damper is fitted to minimise the influence of torsional vibrations developing in the crankshaft. This keeps material stresses arising from these vibrations within permissible design limits. The damper, by reducing oscillations in the crankshaft to low amplitude, prevents premature failures of the driven equipment. How does the Holset Viscous Damper work? The Metaldyne viscous damper has a design / operating principle of using high viscosity silicone fluid to generate damping torque by shearing the thin film of fluid surrounding the inertia ring mass (flywheel). The damper absorbs torsional vibration energy by the shearing effect o
