秸秆类预处理设备的挤出螺杆叶片的强度分析与优化  

Strength analysis and optimization of the extrusion screw blade of straw pretreatment equipment

作　　者：刘鉴钰 黄兴元[1,2] LIU Jianyu;HUANG Xingyuan(School of Mechatronics Engineering,Nanchang University,Nanchang 330031,China;Jiangxi Province Key Laboratory of Lightweight and High-Strength Structural Materials,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]南昌大学江西省轻质高强结构材料重点实验室,江西南昌330031

出　　处：《南昌大学学报（工科版）》2020年第4期376-380,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51863014)。

摘　　要：对于秸秆类纤维素燃料预处理设备的挤出螺杆,螺旋叶片在高温热应力作用下容易出现失效,利用ANSYS软件,以温度、总热通量、等效弹性应变、等效应力为衡量依据,通过热-结构耦合,对挤出螺旋叶片进行强度分析。通过改变螺旋叶片的参数,对其结构进行优化。分析结果表明:锯齿形或双楔形螺旋断面结构可以有效地改善螺旋的受力情况,减小螺旋叶片的应力和应变,提高螺旋叶片的强度。并且当双楔形截面的参数α为10°、β为30°时,热-结构耦合的等效应力和等效位移得到有效改善。For the extrusion screw of cellulose fuel pretreatment equipment,the spiral blade was prone to having damage when it was under high temperature thermal stress.The paper used software ANSYS to analyze the stress condition of the blade by using temperature,total heat flux,equivalent elastic strain,and equivalent stress as the measurement standard.In order to optimize the structure,the parameters of the spiral blade were changed and compared the different analysis results of them.The analysis results showed that the blade which had zigzag or double-wedge spiral section shape can effectively improve the equivalent stress and equivalent strain.The simulation results showed when the parameterαandβof the double-wedge spiral section shape were 10°and 30°,the equivalent stress and equivalent displacement of the thermal-structure coupling were the most effectively improved.

关 键 词：高温热应力 强度 叶片形状 模拟仿真 结构优化 

分 类 号：TH122[机械工程—机械设计及理论]