核桃脱青皮机脱皮辊数值仿真与力学特性分析

Numerical Simulation and Mechanical Characteristics Analysis of Peeling Roller for Green Walnuts Peeling Machine

为分析核桃脱青皮机中的关键加工部件脱皮辊的结构强度和振动特性,计算确定并模拟了脱皮辊的各项参数。将建立好的脱皮辊UG模型导入ANSYS进行静力学分析和模态分析。结果表明:脱皮辊可以在有效剥离核桃青皮的同时还能将脱净后的核桃向出料口方向输送;脱皮辊在工作状态下的最大变形为0.814mm,等效应力为5.25MPa,在负载情况下的最大等效应力远小于材料的屈服强度;分析得到脱皮辊的前6阶固有频率分别为0.8463、51.287、172.07、183.62、186.66、242.33Hz,远大于核桃脱青皮机的工作频率。结果显示该脱皮辊的刚度和强度完全满足要求,且在正常工作的情况下不会发生共振,为进一步研制核桃脱青皮机提供了数据支撑和科学依据。

In order to analyze the structural strength and the vibration property about the crucial machining and peeling parts of the green walnut huller,we calculate and ascertain the structural parameter of the peeling roll are calculated and ascertained.Static analysis and modal analysis were made by using UG to model and leading it in ANSYS.The result turns out that peeling roll can remove the green peel effectively,in the meantime,it can transport the clean walnuts to the discharge port.The peeling roll s maximum deformation and equivalent stress are respectively 0.814 mm and 5.25 MPa during operation.In the different conditions of loaded,the maximum equivalent stress is far less than this material s yield strength.The first six natural frequencies of the peeling roll are 0.846 3 Hz,51.287 Hz,172.07 Hz,183.62 Hz,186.66 Hz and 242.33 Hz which are far greater than the green walnut huller s service frequency.The analysis shows that peeling roll s rigidity and intensity are not only fully meet the requirements,but also guarantee that it won t produce resonance in the condition of regular work.It produces the data support and scientific basis for the further research of the green walnut huller.