Dilatant-Fluid Torsional Vibration Damper for a Four-Stroke Diesel Engine Crankshaft

Abstract This paper presents a study of viscous torsional vibration damper for crankshaft four-stroke diesel engine. The reliable operation widely used silicone-type depends on the ability silicone oil to absorb energy vibrations. non-Newtonian shear flow interlayer, characterised by reduction in shear-rate-dependent viscosity and moment drag forces, negatively affects damping characteristics. A damper, filled with shear-thickening fluid, was considered rheological approach, based growth rate increase, applied. For such larger velocity gradients correspond higher values force, which decreases vibration. parameter effectiveness (defined fluid index, gaps, amplitude frequency) implemented. It has been established that efficiency dilatant does not depend dimensions gaps significantly increases when is instead or Newtonian fluid. At becomes distinct, vibrations are damped more effectively. Critical amplitudes at high-velocity gradients, turn, increase effect as forces index power-law related.