棉精梳机分离罗拉混合驱动系统优化  

Optimization of detaching roller hybrid drive system for cotton comber

作　　者：刘金儒 李新荣[1,2] 王浩 师帅星[1,2] LIU Jinru;LI Xinrong;WANG Hao;SHI Shuaixing(School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology,Tianjin 300387,China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津市现代机电装备技术重点实验室,天津300387 [3]天津工业大学纺织科学与工程学院,天津300387

出　　处：《纺织学报》2023年第11期190-198,共9页Journal of Textile Research

基　　金：工信部产业技术基础公共服务平台项目(2021-0173-2-1);天津市131创新型人才团队项目(201916)。

摘　　要：为更好地解决现有分离罗拉驱动方式传动链长及难以调整分离罗拉运动规律等缺点,首先,分析精梳机分离接合工艺,提出分离罗拉运动过程中的工艺关键点,并用分段拟合的方法进行拟合,得到理想的分离罗拉运动规律;其次,在对分离罗拉混合驱动方式中的齿轮传动系统进行动力学分析的基础上优化系统中各齿轮的齿数;然后,结合运动学分析及相关要求规划伺服电动机的运动规律,计算得到伺服电动机的速度曲线;最后,通过仿真软件及实验平台进行验证。结果表明,优化后的分离罗拉混合驱动系统可以使分离罗拉按照符合工艺要求的运动规律运行并使分离罗拉的运动具有柔性,解决了现有分离罗拉驱动方式机构传动链长及分离罗拉运动规律调整困难等问题。Objective The detaching roller is the core mechanism of the comber.In the process of combing,it needs to complete a high-speed periodic motion that follows the"rise-return-dwell"pattern.Thus,there are stringent requirements on kinematics and dynamics performances of the transmission mechanism of the detaching roller.The conventional mechanical driving mode can generate a large impact and vibrations,and it is difficult to further improve its speed.Therefore,it is particularly important to overcome the shortcomings of the existing drive mode,including long drive chain,high vibration and noise.Method The paper analyzed the separation and jointing process of comber,and put forward the key points in movement of detaching roller.The segmented fitting method was adopted to fit them,yielding the optimal movement law of detaching roller.The number of teeth of each gear in the system was optimized based on the dynamic analysis of the gear transmission system of detaching roller.Combined with kinematics analysis and relevant requirements,the motions of two servo motors were then planned and the speed curves of the servo motors were determined.The theoretical expectation was verified by software simulation and test evaluation.Results The curve of displacement of the detaching roller conformed to the"rise-return-dwell"pattern with the maximum error being 0.30 mm,which satisfied the requirements of flock detachment and overlap.The velocity and acceleration at the starting and terminal points were zero,and the detaching roller did not produce rigid or a flexible impact(Fig.2).Therefore,the fitting results of the motion curve for the detaching roller were ideal.It can be seen from transmission system that,after optimization,the vibration acceleration of most of gears was reduced to varying degrees,and the sum of root mean square vibration accelerations of all gears in the transmission system was reduced by 18.21%compared with the original,achieving the effect of vibration reduction.Vibration accelerations of some gears in the tr

关 键 词：精梳机 分离罗拉 混合驱动 齿轮传动系统 动力学 

分 类 号：TS112.2[轻工技术与工程—纺织材料与纺织品设计]