加热功率和电流频率对钢轧辊感应加热效果的影响

Effects of heating power and current frequency on induction heating of steel roller

采用3δ(电流透热深度)能量集中原理、以差分方式建立φ300 mm钢轧辊电磁感应加热模拟计算模型,探讨了不同加热和保温时间下,加热功率和电流频率对20 mm工作层的温度偏差、次表层温度最高点距辊面距离、轧辊蓄热量、能量消耗的影响。结果表明:感应加热应优先选用低频、大功率的方式,对于工作层温度均匀性要求较高的情况,可选用高频、小功率的加热方式。通过模拟计算手段,可实现内层温度的预测和监控。

An induction heating simulating model for φ300 mm steel roller was built by using differential method and adopting energy focusing principle of 3δ( current diathermy depth). Then the influence of heating power and current frequency on the temperature difference,distance between temperature peak spot of subsurface and roller surface,heat storage and energy consumption of working layer of 20 mm by heating power and current frequency was discussed under different heating and holding time. The results show that induction heating with low efficiency and high power is preferred generally. Heating method of high efficiency and low power can be adopted if high temperature uniformity of the work layer is required. Predicting and monitoring temperature of the inner layer can be realized by simulating methods.