基于ANSYS的盾构盘形滚刀温度场分析及优化
2018-07-25
作者：郝用兴1，李超1，陈子义1，周洋1，范素香1，周建军2
单位：1华北水利水电大学；2盾构及掘进技术国家重点实验室
摘要：盾构机工作过程中，滚刀与岩石摩擦和挤压会导致滚刀温度升高。随着温度升高，刀具的热应变和应变交变会使刀圈的表面微裂和磨损加剧，同时疲劳损坏影响刀具寿命。本文通过ANSYS对盘型滚刀模型进行温度场研究分析，得到盾构单刃滚刀温度场变化规律。结果表明：滚刀温度随切削时间先急剧升高再趋于平稳，随着贯入度的增大，刀圈最高温度升高。在回转试验台上进行试验，验证了仿真结果的可靠性。通过对滚刀温度升高原因的分析，提出通过适当减小刀刃角或减小滚刀直径来优化滚刀，可降低滚刀刀圈温度。仿真分析表明，优化后温度有明显下降。
关键词：盘形滚刀；温度场；有限元仿真；优化
中图分类号：TG729；TH164；TU687；TP391.9文献标志码：A
Temperature Analysis and Optimization of Shield Disc Hob Based on ANSYS
Hao Yongxing，Li Chao，Chen Ziyi，Zhou Yang，Fan Suxiang，Zhou Jianjun
Abstract:When a shield machine is cutting rocks，the friction and squeezing between the shield hob and the rock can cause the hob temperature to rise.With the rising of the hob temperature，the thermal strain and the strain alternating lead to the surface cracks of the insert ring，and to aggravate the tool wear.The fatigue damage of the hob also has a negative effect on the hob life.In this paper，the temperature field of the hob model is analyzed with ANSYS.The results show that the temperature increases sharply at first and then tends to be stabilized，and the maximum temperature increases with the increasing of the hob penetration.The reliability of the simulation results are verified by the experiment on a rotating workbench.By analyzing the cause of the hob temperature rising，the optimization of the hob through reducing the insert angle or reducing the hob diameter is proposed.The simulation analys is demonstrates that after optimization，the temperature can be decreased significantly.
Keywords:shield disc hob；temperature field；finite element simulation；optimization