Torsional vibration damper

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The torsional vibration damper is used to reduce torsional vibrations , especially in internal combustion engines .

The intermittent power transmission from the piston via the piston pin, connecting rod to the crank pin of the crankshaft generates brief torque peaks that lead to noise and wear in gearboxes. However, the vibrations also twist the crankshaft, which can lead to torsional fractures . Torsional vibration dampers dampen these torsional vibrations and can use rubber, rubber, silicone, oil or disc springs as damping material.

A torsional vibration analysis is used to determine the type and dimensions of the secondary mass (flywheel) and primary mass (housing). Torsional vibration dampers are also used in fuel pumps , camshafts and longer drive shafts , with the latter often in combination as torsional, axial, flat surface or radial vibration dampers.

See also

• Torsion coupling
• Dual mass flywheel