| 销钉机筒挤出机内物料流动与混合效果的数值模拟 |
| Numerical simulation of flow and distributive mixing in pin-barrel extruder |
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| DOI： |
| 中文关键词: 销钉机筒挤出机 流场 混合 |
| 英文关键词: pin-barrel extruder flow field distributive mixing |
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| 中文摘要: |
| 在单螺杆挤出简化模型的基础上，采用滑移网格技术，考虑销钉与螺杆相对运动的条件，分别研究销钉数量、销钉排间距、螺槽宽度、拖曳速度对螺杆圆周展开面内物料流动与混合效果的影响。结果表明：销钉及螺棱切槽对物料具有明显的强化混合作用，减小销钉排间距及螺槽宽度、增大销钉数量和提高拖曳速度都会改善混合效果。对于Φ90销钉挤出机，每排6～8枚销钉、销钉排间距为60～72 mm、螺槽宽度为54 mm左右、转速为25～50 r·min-1时可达到较好的混合效果。 |
| 英文摘要: |
| Based on the reasonably simplified model of single-screw extrusion process，the influence of the number and row distance of pins，the width of helical groove and the dragging velocity on the flow and distributive mixing around the unfolded surface of screw in pin-barrel extruder was investigated by the sliding mesh technology and taking the movement between pins and screw into account.The results showed that the cuts in the pins and flights intensified the distributive mixing significantly；and the mixing efficiency could be improved by reducing the row distance of pins and the width of helical groove，and increasing the pin number and dragging velocity.For Φ90 pin-barrel extruder，the better distributive mixing could be obtained by using 6～8 pins in a row，60～72 mm row distance of pins，54 mm width of groove and 25～50 r·min-1 screw speed. |
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