卧轮式分级机转子临界转速的计算

Calculation of critical speed for horizontal wheel classifier rotor

为避免卧轮式分级机在运转过程中产生共振,以卧轮式分级机实验机和工业样机转子为研究对象,采用传递矩阵法和基于ANSYS Workbench 16.0的有限元法对其临界转速进行计算,将计算结果与试验测试结果进行比较。结果表明,对于实验机,传递矩阵法与试验测试结果偏差为11.9%,有限元法与试验测试结果偏差为4.1%;对于工业样机,传递矩阵法与试验测试结果偏差为10.5%,有限元法与试验测试结果偏差为3.5%,说明有限元法计算结果准确性更高,认为对于卧轮式分级机转子临界转速的计算,更适合采用有限元法。

To avoid the resonance of horizontal wheel classifier in the process of operation, transfer matrix method and finite element method based on ANSYS Workbench 16.0 were used to calculate the critical speed of horizontal wheel classifier rotor in experimental machine and industrial prototype. Comparing the calculation and test values, the results show that for the experimental machine, the deviation between transfer matrix calculation and test value is 11.6%, while the deviation between finite element calcultation and test value is 4.1%,for the industrial prototype, the deviation between transfer matrix calculation and test value is 10.5%,while the deviation between finite element calcultation and test value is 3.5%. This comparation results suggest that the finite element method is more accurate, so the calculation of critical speed for horizontal wheel classifier rotor should be given priority to finite element method。