大功率真空电子束冷床熔炼炉拉锭机构振动仿真分析

Vibration Simulation Analysis of Ingot Withdrawing Mechanism of Large Power Vacuum Cold Hearth Furnace

拉锭装置是真空电子束熔炼炉的核心部件之一,其运动的模式及速度对拉锭工作的稳定性及铸锭的组织结构有明显影响。一定的振动对铸锭的表面质量及晶粒细化程度有改善作用。在振动冲击下,结构将产生附加变形影响位移监测,相关零部件的强度也需要校核。在前期开发阶段,本文结合简化模型的理论分析与真实物理模型的仿真分析,对拉锭机构连接台三维模型的振动特性进行研究,分析了位移传感器的振动位移放大效应,提出优化方案降低测量误差,并分工况对结构强度进行校核,可为后续相关结构设计提供参考。

The ingot withdrawing device is one of the core components for the vacuum electron beam melting furnace,and its motion mode and speed have a significant effect on the stability of the withdrawing process and the structure of the ingot.Certain vibration can improve the surface quality and grain refinement of the ingot.Under the impact of vibration,the structure will generate additional deformation,and the strength of the related components also needs to be checked.In the pre-development stage,by combining the theoretical analysis of the simplified model and the simulation analysis of the real physical model,the vibration characteristics of the three-dimensional model for the vibrating ingot mechanism connecting table is studied.The vibration displacement amplification of the displacement sensor is analyzed,the optimization scheme is proposed to reduce the measurement error,and the strength of the structure is tested according to different working conditions.This work may provide some references for subsequent related structural design.