中、大型轧花机棉子梳的有限元分析与改进设计

棉子梳是轧花机中有效控制毛头率的部件,中、大型轧花机的棉子梳较长,在棉子卷压力和子棉卷转动对棉子梳所产生的切向力作用下,中间部分一段长度范围变形较大,导致轧花机整个幅宽方向毛头率不一致,不但损失了衣分,而且直接影响了皮棉质量。针对上述问题,利用ANSYS Workbench有限元分析软件对棉子梳进行静力学分析,通过建模、加载、计算及后处理,获得棉子梳的变形分布情况,经与实际轧花过程中的棉子梳变形结果比对是一致的。基于此对棉子梳提出改进方案,并通过试验对比分析改进前后的毛头率。结果表明,改进后的棉子梳有效解决了大、中型轧花机的毛头率不一致问题。

Finite Element Analysis and Improving Design of the Medium and Large Gin Cottonseed Comb

The cottonseed comb is an effective control parts for burring rate in cotton gin. The cottonseed comb of medium and large cotton gin is longer. Under the tangential force caused by the cottonseed pressure and seed cotton roll rotation to cottonseed comb, the deformation of the middle part is larger, resulting in inconsistent of burring rate along the width direc-tion of cotton gin, which not only damage the lint turnout, but also directly affects the quality of lint. To counter the prob-lems above, the static analysis of cottonseed comb was conducted using finite mechanical model based on ANSYS Workbench software. Through modeling, loading, settlement and post-processing, the deformation distribution of cottonseed comb was ob-tained, which was consistent to that of the actual deformation results during the process of cotton ginning. Improvement scheme for cottonseed comb was put forward; and the burring rate before and after improvement was compared. The results show that the improved cotton seed comb solves the problem of inconsistent burring rate of large and medium-sized cotton gin effectively.