Rotor Dynamics Analysis and Modification of D250 Supercharger
Considering poor stability,frequent malfunctions of the supercharger and through taking D250 supercharger of a petrochemical plant as the object of study,the concentrated parameter dynamic model of the rotor-bearing system was established.According to the continuous condition,the Riccati transfer matrix method was used to calculate the low-order critical speed and the rotor's vibration mode under rigid support and elastic support,including the damping unbalance response of the axial parts of the rotor under residual unbalance.Through comparing the influence of the changes of supporting stiffness,damping or journal size on the rotor unbalance response,the supporting system improvement scheme was presented,including having the shaft neck lathed,the original 3-oil wedged bearing replaced by 4-oil wedged bearing so as to have above-mentioned troubles solved completely.
万方数据
维普
