Development of Internal Crankshaft TVD in Hybrid-Specific Engine
A computational model of internal crankshaft torsional vibration damper(TVD)was established using AVL-Excite simulation software and experimentally validated.Crankshaft front-end torsional angle displacement,rubber deformation rate,dissipative power and rubber temperature were calculated using the computational model.Rubber temperature and rubber deformation rate significantly affected the rubber life of the TVD.Testing was con-ducted on the engine test bench to measure the rubber temperature of TVD with different crankshaft material and rubber thickness schemes.Torsional fatigue tests were conducted using dedicated test bench,rubber deformation rate-fatigue life time curves were established at different temperatures for crankshaft torsional vibration damper.The results indicate that,rubber deformation rate and temperature of 38MnVS6 crankshaft scheme are lower than those of QT850 crankshaft scheme under various speed conditions.The rubber temperature of 38MnVS6 crankshaft scheme is below 130℃at different engine speed conditions and full frequency range of the crankshaft torsional vi-bration damper,and the fatigue life time of 38MnVS6 scheme is 1.62 times than that of QT850 under the condition of 6000 r/min rated power test.An analysis of post-durability rubber indicates that rubber aging is acceptable.
internal crankshaft torsional vibration damperrubber deformation raterubber temperaturefatigue life time
万方数据
维普
