螺旋升降机丝杠螺母副自激振动分析

发布时间：2018-03-31 13:38

本文选题：螺旋升降机　切入点：丝杠螺母副　出处：《组合机床与自动化加工技术》2016年04期

【摘要】：利用Gallina二自由度模型对螺旋升降机在下降过程中发出的异响声和振动进行研究。指出由于螺旋升降机的惯性矩阵是非对称矩阵,所以垂向平动和绕铅垂轴转动存在非对称的耦合现象。同时,研究表明惯性矩阵的非对称性是造成系统自激振动的主要原因,并得出了螺旋升降机动力学稳定性的判定依据。结合某螺旋升降机的参数,利用Math CAD分别得到了摩擦系数、丝杠中径和轴向载荷对系统稳定性影响的曲线,并提出了避免螺旋升降机自激振动的措施。
[Abstract]:Using Gallina two-degree-of-freedom model, the abnormal sound and vibration of helical hoist during descent are studied. It is pointed out that the inertia matrix of helical elevator is asymmetric matrix. Therefore, there is asymmetric coupling between vertical translation and rotation around the vertical axis. At the same time, the study shows that the asymmetry of inertial matrix is the main cause of the self-excited vibration of the system. According to the parameters of a screw lift, the influence curves of friction coefficient, central diameter of lead screw and axial load on the stability of the system are obtained by Math CAD. The measures to avoid self-excited vibration of screw lift are put forward.
【作者单位】：电子科技大学机械电子工程学院;
【基金】：国家自然科学基金项目(51405067)
【分类号】：TH211.6

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