剑杆织机柔性从动件共轭凸轮打纬机构动力学分析  

Dynamic analysis of flexible follower conjugate cam beating-up mechanism in rapier loom

作　　者：金国光[1] 秦凯旋[1] 魏展[1] 袁汝旺[1] 周国庆[1] 

机构地区：[1]天津工业大学天津市现代机电装备技术重点实验室,天津300387

出　　处：《纺织学报》2016年第5期137-142,共6页Journal of Textile Research

基　　金：国家自然科学基金资助项目(51475330)

摘　　要：针对剑杆织机共轭凸轮打纬机构因自身振动造成筘座角加速度偏差大,降低织造的质量,缩短共轭凸轮寿命的问题,对共轭凸轮打纬机构进行合理化简化后,采用Rayleigh-Ritz法对柔性从动件进行离散化处理,基于Lagrange方程建立了剑杆织机柔性从动件共轭凸轮打纬机构的动力学方程。运用Mat Lab软件对柔性从动件共轭凸轮打纬机构进行了动力学仿真分析,在仿真过程中通过改变打纬机构的结构参数探索减小打纬机构振动的方法。仿真结果表明,打纬机构在高速运动过程中柔性从动件产生的横向振动会导致筘座角加速度波动明显,提出了通过减小筘座脚质量来减小筘座角加速度偏差和机构振动的方法。The vibration of the rapier loom conjugate cam beating-up mechanism results in the sley angular acceleration deviation,reduces the weaving quality,and shortens the life of the conjugate cam.To solve these problems,conjugate cam beating-up mechanism is reasonably simplified. Flexible follower is discretized by Rayleigh-Ritz method and the dynamic equation of flexible follower is established based on the Lagrange equations. The dynamic simulation for the beating-up mechanism with flexible follower conjugate cams is carried out by Mat Lab. In the process of simulation,the method of reducing the vibration of beating up mechanism is explored by changing the structure parameters of the beating-up mechanism. The simulation results show that the angular acceleration of the sley will fluctuate significantly due to the transverse vibration. A method for reducing the angular acceleration deflection and reducing vibration of mechanism is proposed by reducing the mass of the sley feet.

关 键 词：剑杆织机 打纬机构 柔性从动件 LAGRANGE方程 角加速度 动力学 

分 类 号：TH112[机械工程—机械设计及理论] R103.337.3[医药卫生—公共卫生与预防医学]