滚轮支承卧式离心铸造机横向振动性能分析

Lateral vibration property analysis for rolling-wheel-supported horizontal centrifugal casting machines

为抑制不良振动并提高炉管产品的品质,需准确分析离心铸造机的横向振动特性.对滚轮式离心铸造机滚轮支承的刚度和阻尼进行了分析计算.在综合考虑支承偏转刚度、型管转动惯量和陀螺效应的情况下对经典的传递矩阵法进行了改进,建立了更为准确的离心铸造机转子系统振动模型,得到了离心铸造机转子系统横向振动的各阶有阻尼固有频率以及不平衡响应曲线.分析了不同支承间距对离心铸造机转子系统横向振动特性的影响,为离心铸造机滚轮支承的结构优化和合理布置提供理论依据.

To restrain undesirable vibrations and improve the quality of the cast furnace tubes, the lateral vibration properties are accurately analyzed. Subsequently, the rolling-wheel-supported stiffness and damping of centrifugal casting machines are calculated. By comprehensively considering the angular supporting stiffness, rotary tube inertia and gyroscopic effect, the traditional transfer matrix method is improved. Accordingly, the more accurate vibration model of rotor system is established to obtain inherent damping frequencies and unbalanced response curves of system lateral vibration. Consequently, the impact of diverse support distances on lateral vibration properties is speculated. Therefore, this approach sets a reference to the support structural optimization and rational layout for rolling-wheel centrifugal casting machines.