摘要
双螺杆挤压膨化技术是一种先进的物料挤压成形技术,广泛应用于饲料加工领域、塑料加工领域及食品加工领域。建立了同向啮合双螺杆挤压膨化机共轭型螺杆的力学模型及有限元模型,并运用有限元分析方法对不同螺距和内径外径比(SAR)的螺杆进行了应力分析。结果表明,螺杆最大应力随着螺距的增加而减小,而且减小的幅度逐渐变小;随着SAR的减小而减小,而且对螺杆最大应力的影响逐渐较小;螺杆最大应力出现的位置与螺距无关而与SAR有关。
Twin-screw extrusion technology is a kind of advanced extrusion modeling technology widely applied in feed processing field,plastic processing field and food processing field.It established mechanical model and finite element model（FEM）of conjugate screw in co-rotating twin-screw extruder and carried out stress analysis on screws in different pitch and SAR through the method of FEA.It is shown that the maximum stress of screw decreases with the increase of pitch of screw and the reduction gradually diminishes,the maximum stress of screw has positive correlation with SAR and SAR has less influence on the maximum stress.the position of the maximum stress of screw is irrelevant to the pitch but related with SAR.
出处
《机械设计与制造》
北大核心
2013年第1期175-177,共3页
Machinery Design & Manufacture
基金
江苏省重大科技成果转化项目(BA2009)
