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| Simulation analysis of different screw elements of co-rotating full-meshing twin-screw vegetable protein extruder |
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| DOI： |
| KeyWord:co-rotating full-meshing helix element meshing element tooth shaped element simulation analysis |
| FundProject: |
| Author Name | Affiliation | | LI Zhen1,2, XIANG Hai1, REN Jiajia1,2, LU Liming2,
YAO Zhanbin2, ZHOU Hongyi1 | 1.Chinese Academy of Agricultural Mechanization Sciences Group Co. ,Ltd. , Beijing 100083，China；
2.China Machinery Kangyuan Cereals and Oils Equipment（Beijing）Co. , Ltd. , Beijing 100083，China |
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| Abstract: |
| In order to clarify and quantify the functions of each screw element in the co-rotating full-meshing twin-screw extruder, and to increase the rationality of configuring screws for the twin-screw extruders used for the production of plant-based meat, the shear rate, mixing index, material residence time, and maximum shear stress distribution of double helix elements, 5-mesh disc meshing elements, and 3-tooth disc tooth shaped elements of 32 mm screw elements in the SLZ36 type extruder were simulated and analyzed under the condition of physical parameters of low-temperature defatted peanut protein powder. Solidworks software was used to establish the geometric model of the elements, Gambit software was used for mesh partitioning and mesh quality analysis of the model, numerical simulation was conducted by Polyflow software, and the simulation results were post-processed and analyzed using Fieldview software. The results showed that the mixing performance order of the three screw elements on materials through mixing index was tooth shaped elements>meshing elements>helix elements, the axial mixing performance order of three screw elements was tooth shaped elements>helix elements>meshing elements through material residence time analysis, the shear performance of materials order of three screw elements was meshing elements>helix elements>tooth shaped elements through the analysis of shear rate and average maximum shear stress. When combining the screws of twin-screw extruder used for production of plant-based meat, considering the helix elements is the maximum case of the whole screw, the meshing elements and tooth shaped elements can be reasonably configured to increase the shear capacity of the screw and the mixing ability of the screw, respectively. |
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