植物肉挤出机双螺杆结构设计与验证  

Design and verification of double screw structure for plant meat extruder

作　　者：凤鹏锦 宁萌 韦龙星 杨军 潘永基 FENG Pengjin;NING Meng;WEI Longxin;YANG Jun;PAN Yongji(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology,Wuxi 214122,China;Foshan Chancheng District Technical School,Foshan 528000,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [3]佛山市禅城区技工学校,广东佛山528000

出　　处：《包装与食品机械》2024年第2期55-61,共7页Packaging and Food Machinery

基　　金：国家重点研发计划项目(2022YFD2100304);国家自然科学基金项目(51705201)。

摘　　要：针对现有植物肉挤出机双螺杆结构挤出物料存在纤维结构差、挤出稳定性低等问题,设计一种基于植物蛋白肉纤维成型工艺的双螺杆。面向纤维成型工艺过程中螺杆进料混合段、升温熔融输送段、高温熔融剪切段、计量段不同的作用,对螺杆构型及其参数进行设计优化,并进行螺杆强度初步校核;建立物料在高温熔融剪切段的流道模型,分析流道内压力场、速度场及流体迹线分布,探究其元件组合对纤维成型的影响;研制螺杆样机并分析样品宏观纤维结构与组织化指数,验证植物蛋白肉纤维成型效果。螺杆强度达标且流场最高压力可达到391.8 MPa,正向螺旋元件+正向捏合块+反向螺旋元件的排列组合具有良好的建压输送及熔融剪切能力,挤出样品组织化指数高达2.582 4 g,且宏观纤维结构丰富。研究为食品级挤出机的双螺杆设计提供参考。In order to address the problems of poor fiber structure and low extrusion stability in the existing twin-screw structure of plant meat extruders,a twin-screw based on the plant protein meat fiber forming process was designed.In view of the different functions of the screw feed mixing section,heating and melting conveying section,high temperature melting and shearing section,and metering section in the fiber forming process,the screw configuration and parameters were designed and optimized,and the screw strength was preliminarily checked;A channel model for materials in the high-temperature melting shearing section was established,the pressure field,velocity field,and fluid trace distribution in the channel were analyzed,and the influences of component combinations on fiber forming were explored;A screw prototype was developed and the macroscopic fiber structure and tissue index of the sample were analyzed to verify the fiber forming effect of plant protein meat.The screw strength meets the standard and the maximum pressure in the flow field can reach 391.8 MPa.The combination of forward spiral elements,forward kneading blocks,and reverse spiral elements has good pressure building,conveying,and melting shearing capabilities.The extruded sample has a high organization index of 2.5824 g,and the macroscopic fiber structure is rich.The research provides reference for the design of twin screws in food grade extruders.

关 键 词：双螺杆设计 植物蛋白肉 高温熔融剪切段 数值模拟 试验验证 

分 类 号：TS210.3[轻工技术与工程—粮食、油脂及植物蛋白工程]