异纤分拣机喷管板内流道结构优化分析  

Optimization analysis of the flow channel structure in the nozzle plate of foreign fiber sorter

作　　者：孙戬 王彤 姜博艺 陈云辉 林何 SUN Jian;WANG Tong;JIANG Boyi;CHEN Yunhui;LIN He(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710048,China;Xi’an Key Laboratory of Modern Intelligent Textile Equipment,Xi’an 710048,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]西安市现代智能纺织装备重点实验室,陕西西安710048

出　　处：《纺织高校基础科学学报》2023年第3期39-45,共7页Basic Sciences Journal of Textile Universities

基　　金：国家自然科学基金面上项目(51805402);西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043);西安工程大学博士科研启动基金(BS201804)。

摘　　要：针对异纤分拣机在剔除异纤过程中因喷管板出口速度分布不均、入口压力过大而导致的剔除率较低且能量损耗高的问题,结合拉瓦尔喷管结构特点对异纤分拣机喷管板内流道进行优化,以减少能量损耗,降低入口压力,提高异纤剔除性能。针对喷管板的一组流道,建立内流道入口位置优化及出入口位置联合优化2种方案,采用数值模拟方法对优化前后的流体性能进行分析,对比其速度、压力和质量流率。结果表明:喷管板内流道出入口联合优化方案更优,综合性能得到有效提升。与原始结构相比,喷管板出口速度提高了62.7 m/s,且能量损失较仅优化流道入口的方案减少7.9%,此研究对高性能异纤分拣机研发及实际应用具有指导意义。To address the problem of low rejection rate and high energy loss caused by uneven velocity distribution and high inlet pressure of the nozzle plate in the process of rejecting foreign fibers in the foreign fiber sorter,the inner flow channel of the nozzle plate of the foreign fiber sorter was optimized according to the structural characteristics of the Laval nozzle to reduce energy loss,lower inlet pressure and improve foreign fiber rejection performance.Aiming at a group of flow channels in the nozzle plate,two schemes of optimization of inlet position of inner flow channel and joint optimization of inlet and outlet position were established.The fluid performance before and after optimization was analyzed by numerical simulation method,and its velocity,pressure and mass flow rate were compared.The results show that the combined optimized solution of runner inlet and outlet in the nozzle plate is better and the overall performance is effectively improved.Compared with the original structure,the nozzle exit speed is increased by 62.7 m/s and the energy loss is reduced by 7.9% compared with the optimized runner inlet solution.The study is of guidance for the development and practical application of high performance foreign fiber sorting machines.

关 键 词：异纤分拣机 异性纤维 棉纤维 流道结构 

分 类 号：TS112.7[轻工技术与工程—纺织材料与纺织品设计]