Abstract:When using the single-sided vertical dynamic balancing machine to measure the unbalance of rotors of different sizes and different masses, it is found that there is an extra unbalance that does not match the theoretical value. The traditional method is difficult to give a reasonable explanation, analysis shows it ignores the variation of the synthesis centroid of the rotor and the swing frame system, the unbalance superposition effect will affect the accuracy of the measurement. The centroid equation of motion caused by the eccentricity of the rotor and the swing frame system was analyzed, and the position of vibration center was obtained. The concept of unbalance superposition effect and extra unbalance is proposed. Superimposed unbalance formula of the synthesis system was deduced. Effect of rotor mass and rotor mounting height on the extra unbalance was analyzed. Comparative error analysis was performed based on the experimental data. The relationship between the additional unbalance and rotor mass and rotor mounting height is verified. The source of the extra unbalance was clarified.
王秋晓,李皓月,郭永财,郭思岑. 单面立式平衡机的不平衡叠加效应的实验研究[J]. 振动与冲击, 2020, 39(15): 88-94.
WANG Qiuxiao, LI Haoyue, GUO Yongcai, GUO Sicen. Tests for unbalance superposition effect of a single-sided vertical balancing machine. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(15): 88-94.
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