基于有限元的辊式制粉磨辊温度场分析及试验验证

Temperature field analysis and test verification of wheat milling roller based on finite element

【目的】研究小麦制粉生产中的磨辊温度场分布和变化的规律.【方法】试验以制粉中的磨辊为研究对象,建立磨辊二维瞬态温度场数值模型,利用有限元分析软件ANSYS对磨辊瞬态温度场进行求解分析,并通过磨辊表面温度实测数据与模拟结果的对比,验证数值模型和模拟结果的可靠性.【结果】在制粉开始阶段,辊体表面温度由25℃迅速升高至60℃左右;然后温度上升速率逐渐减小,直至稳定在65.6℃左右的高温状态;辊体表面温度沿着辊体一端至另一端呈现中间高两端低的分布;不同转速下磨辊表面温度上升规律基本一致,转速越高时,磨辊温度上升越快,上升幅度越大.【结论】研究结果可为磨辊的设计和优化及磨辊温度的降低提供理论依据.

【Objective】In order to study the distribution and variation of roller temperature field in flour production,【Method】The milling roller is taken as the research object in this paper,and the two-dimensional transient temperature field numerical model of the roller is established.The finite element analysis software ANSYS is used to solve and analyze the transient temperature field of the roller,and the reliability of the numerical model and simulation results is verified by comparing the measured data of the roller surface temperature with the simulation results.【Result】The surface of the roller increases rapidly from room temperature 25℃to 60℃at the beginning of milling.Then,the rate of temperature rise gradually decreased until it stabilized at a high temperature of about 65.6℃.The surface temperature of the roller body is high in the middle and low at both ends along the roller body from one end to the other.The rising law of roller surface temperature is basically the same at different rotating speeds.The higher the rotating speed,the faster the roller temperature rises and the greater the rising range.【Conclusion】The results can provide a theoretical basis for the design and optimization of roller and the reduction of roller temperature.