用于亚麻纤维纱线晶变改性系统的集成阀研究

发布时间：2018-02-02 15:07

本文关键词： 改性系统集成阀液氨电机控制机电一体化　出处：《东华大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着人们生活品质的提高,亚麻纤维制成的高档服装日益受到消费者的青睐。由于亚麻纤维本身的固有属性,使得其需要经过液氨改性才能变得质地光滑,而亚麻纤维纱线晶变改性系统中的关键步骤就是液氨对亚麻纤维的处理。由于亚麻纤维纱线晶变改性系统中承载液氨的管道众多,大量球阀的运用降低了生产效率,提高了劳动力的成本,也给日常维护带来不便,更重要的是,阀门每次的开启都需要人工控制,使整个系统的保密性大大降低,本文针对以上问题,提出了将集成阀应用在亚麻纤维纱线晶变改性系统中的理念,并且采用工控机通过步进电机驱动阀门,做了如下工作。针对液氨介质易挥发、有腐蚀性、有毒等特性设计了一款集成阀门,经过理论计算,设计了阀门的阀体、阀套和阀芯,讨论了其密封性、五种工作状态切换等问题提出了电气总体方案,步进电机采取闭环控制方式,拟选了电机并且根据实际需求进行了计算,所选电机可以满足工作状态要求。选用工控机连接运动控制卡控制步进驱动器从而驱动步进电机,步进电机采用PWM技术控制,降低了成本,同时具备很好的稳定性。提出并推导了调整电机转速的指数模型,设计了在步进电机加减速控制和工控机上实现控制系统功能的流程图,组成工控机界面-运动控制卡-步进驱动器-两轴步进电机-联轴器和减速带-集成阀阀套及阀芯的结构,可以从上位机控制阀芯的位置,满足液氨改性系统五种工作状态的要求,降低了人工成本增加了系统的技术保密性。根据所设计的机械结构和电气控制系统,并基于步进电机的指数加减速模型,推导了步进电机启动、恒速、减速阶段的数学模型,得出阀门转过的角度和时间的理论计算公式并且绘制了转角—时间曲线。
[Abstract]:With the improvement of quality of life, the flax fiber made of high-grade clothing increasingly favored by consumers. Because of the inherent properties of flax fiber itself, the need to go through the liquid ammonia modified to become a smooth texture, and flax fiber Sha Xianjing changed the key steps of the system is the liquid ammonia treatment of flax fiber. The ammonia pipeline carrying flax crystal fiber yarn modified in many large ball valve with reduced production efficiency, increased labor costs, but also to the daily maintenance inconvenience, more important is to open the valve, every time all need manual control, the security of the whole system is greatly reduced, to solve the above problems this paper proposed the integrated valve used in flax fiber yarn crystal modified system concept, and using the computer through the stepper motor to drive the valve, do the following work.
For liquid ammonia volatile, corrosive, toxic and other features to design a integrated valve, through theoretical calculation, the design of the valve body, valve sleeve and spool, discusses its seal, the paper puts forward the overall plan of five kinds of electrical state switching, stepping motor adopts closed loop control mode to be selected and according to the actual needs of the motor are calculated, the selected motor can meet the requirement of working conditions.
The industrial control computer is connected with the motion control card to control the stepping driver to drive the stepper motor. The stepper motor is controlled by PWM technology, which reduces the cost and has good stability at the same time.
Put forward and index model derived the motor speed adjustment, design the flow chart of the function of the control system in the stepper motor acceleration and deceleration control and IPC, composed of IPC interface - motion control card and stepper drive - axis stepper motor coupling and deceleration with integrated valve sleeve and the valve core structure. From the PC control spool position, meet the liquid ammonia modification system five kinds of work condition, reduce labor costs and increase technological system security.
According to the mechanical structure and electrical control system design, and based on the model of the stepper motor acceleration and deceleration index, are stepping motor starting, constant speed, deceleration stage mathematical model, the valve turning angle and the time of the theoretical calculation formula and draw the angle time curve.

【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH134;TP273

【参考文献】