目的 为了解决ZJ17卷烟机原梗签分离方式分离不彻底、梗中含丝率高等问题，设计一种在线梗签分离系统。方法 通过对系统的真空悬浮装置、离心风分装置及风分速度进行研究，以实现卷烟机梗丝的再次风分，达到较好的梗丝分离回收效果。同时通过人机交互实现对风分气压、梗签流量的自动控制，确保分离效果和系统运行的稳定性。结果 该梗签分离系统能实现梗签的在线分离、回收及风分气压的自动调节，能将剔除的梗签混合物中梗的含丝率由20.33%降至1.8%。结论 该系统有效提高了烟丝利用率，降低了烟丝消耗，可推广应用于行业内所有ZJ17，ZJ118等型卷烟设备上。

The work aims to design an online stem separation system to solve the problems that the original stem of the ZJ17 cigarette machine cannot be separated completely and the cut tobacco rate in the stem is high. Through the research on the system's vacuum suspension device, centrifugal air dividing device and air dividing speed, the secondary air dividing of tobacco stem was realized, and a better separation and recovery effect of tobacco stem was achieved. At the same time, through human-computer interaction, automatic control of air diving pressure and stem flow was realized to ensure the separation effect and stability of system operation. The stem separation system could realize the online separation and recovery of the stem and the automatic regulation of air diving pressure, and reduce the cut tobacco rate in the stem mixture from 20.33% to 1.8%. The system can effectively improve the utilization rate of cut tobacco and reduce the consumption of tobacco. The system can be promoted and applied to all ZJ17, ZJ118 and other cigarette machines in the industry.