拉杆转子临界转速随拉紧力变化规律试验

Experimental Study of the Variation of Tie-bolt Fastened Rotor Critical Speeds With Tighten Force

为了研究拉杆转子临界转速随拧紧力的变化规律,搭建了拉紧力测量试验台,测量拉杆拉紧力随拧紧力矩的变化。设计并加工了模化拉杆转子,搭建了拉杆转子转动试验台,测量在不同拉紧力下拉杆转子的动力学响应。根据5组不同拧紧力矩下的动力学响应得到了拉杆转子前两阶临界转速,分析了临界转速随拉紧力的变化规律,并与理论计算结果进行了对比分析。结果表明,随着拉紧力的增加,拉杆转子在升速和降速过程中的前两阶临界转速随着拉紧力的增加而增加。与理论计算结果对比发现,理论模型计算的前两阶临界转速与试验结果比较接近,但仍需要进一步改进以更好地反映拉杆拉紧力对临界转速的影响。

In order to investigate the variations of the critical speeds of the tie-bolted rotor with tighten force,the tighten force test rig is established,and the variation of the tighten force with torque is measured.A model tie-bolt fastened rotor is designed and manufactured,and the test platform for rotor dynamics is established.The dynamical responses of the tie-bolted rotor are measured under different tighten forces.According to the dynamical responses under five different tighten torques,the first two critical speeds of the model tie-bolted rotor are obtained,and the variations of critical speeds are analyzed.The experimental results are compared with the theoretical simulation results,showing that the first two critical speeds of the tie-bolted rotor increase as the tighten force increases while either speeding up or slowing down.Comparison with theoretical analysis shows that the critical speeds of the simulation are close to those of the experimental results,while the theoretical model still requires some improvement to better illustrate the influence of the tighten force on critical speeds.