大流量蠕动泵特性研究及试验系统设计
发布时间：2019-04-21 18:19
【摘要】：随着固体推进剂含能水平的提高以及混合设备体积的增加，传统混合工艺混合效果与混合效率的矛盾凸显。连续混合工艺可以避免这一矛盾。而选择合适的液体组分加料装置是实现连续混合的关键。蠕动泵因具有剪切作用低、传送精度高等优点成为了加料装置的一种选择。 本文首先分析了蠕动泵的工作原理，对蠕动流做了简要分析，建立了流动模型，使用N-S方程对流函数进行了推导，讨论了影响蠕动泵流量的因素。 然后针对液体组分温度敏感，冲击敏感的特性和系统加料准确性的要求，采用计算机测控技术，设计了基于大流量蠕动泵的试验系统。试验系统的设计包括硬件和软件两个方面。硬件方面，，采用铂电阻温度传感器、FlexiForce压力传感器，实现了温度采集和压力采集方案。解决了封闭结构的泵头内压力难以测量的问题。软件方面，分析了LS-BUSASCⅡ通信协议并利用Labview虚拟仪器技术完成了系统控制程序的编写。设计了温度和压力测量子VI并对传感器的信号进行处理。设计了一种基于Flexi Force压力传感器输出信号的蠕动泵辊子转动计数器，实现了定转数的蠕动泵自动控制。 最后对一种大流量的蠕动泵进行了试验，获得了该泵不同工况下关键部位温度、泵管受压状态、转速和泵管尺寸等因素对流量的影响等重要参数，可为定量加料装置的运行参数制定提供参考。
[Abstract]:With the increase of solid propellant energy content and the increase of mixing equipment volume, the contradiction between mixing effect and mixing efficiency of traditional mixing process is obvious. Continuous mixing process can avoid this contradiction. The selection of suitable liquid component feeding device is the key to realize continuous mixing. Peristaltic pump has become a choice of feeding device because of its low shear effect and high transmission accuracy. In this paper, the working principle of peristaltic pump is analyzed, and the flow model is established. The convective function of Nus equation is used to deduce the flow rate of peristaltic pump, and the factors affecting the flow rate of peristaltic pump are discussed. Then, according to the characteristics of temperature sensitivity and shock sensitivity of liquid components and the requirement of feeding accuracy of the system, a test system based on large flow peristaltic pump is designed by means of computer measurement and control technology. The design of the test system includes hardware and software. In hardware, platinum resistance temperature sensor and FlexiForce pressure sensor are used to realize temperature acquisition and pressure acquisition. The problem that the pressure in the pump head of the closed structure is difficult to measure is solved. In the aspect of software, the communication protocol of LS-BUSASC 鈪
本文编号：2462444
[Abstract]:With the increase of solid propellant energy content and the increase of mixing equipment volume, the contradiction between mixing effect and mixing efficiency of traditional mixing process is obvious. Continuous mixing process can avoid this contradiction. The selection of suitable liquid component feeding device is the key to realize continuous mixing. Peristaltic pump has become a choice of feeding device because of its low shear effect and high transmission accuracy. In this paper, the working principle of peristaltic pump is analyzed, and the flow model is established. The convective function of Nus equation is used to deduce the flow rate of peristaltic pump, and the factors affecting the flow rate of peristaltic pump are discussed. Then, according to the characteristics of temperature sensitivity and shock sensitivity of liquid components and the requirement of feeding accuracy of the system, a test system based on large flow peristaltic pump is designed by means of computer measurement and control technology. The design of the test system includes hardware and software. In hardware, platinum resistance temperature sensor and FlexiForce pressure sensor are used to realize temperature acquisition and pressure acquisition. The problem that the pressure in the pump head of the closed structure is difficult to measure is solved. In the aspect of software, the communication protocol of LS-BUSASC 鈪
本文编号：2462444
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