Abstract:

Pneumatic logistics transmission system is widely used in medical and chemical industries. Pipe pressure drop and characteristic velocity are key parameters for vertical pipe pneumatic logistics transmission system, but related reports are few. Based on the vertical pipe pneumatic logistics transmission system constructed in the laboratory, experiments of compressed air flow conveying transfer bottle were carried out. Conveying characteristics analysis as well as the modeling of the pipe pressure drop and characteristic velocity were conducted. First, with the help of pressure drop signal analysis, high-speed camera and data processing, transfer bottle conveying characteristics were analyzed. And a method to identify the transfer bottle motion states was proposed based on the analysis of the pipe pressure drop signal. Secondly, comprehensively considering the structural characteristics of the flow channel, a pipeline pressure drop model of the vertical pipe gas flow transmission system was established, and the pipeline resistance coefficient was obtained through data regression. Finally, on the basis of force balance analysis and conservation of mechanical energy, characteristic velocity prediction models were established, which provide a new method for the transfer bottle status identification and tracking monitoring.

Key words: pneumatic logistics transmission, pipe pressure drop, characteristic velocity, multiphase flow, pneumatic conveying, hydrodynamics

摘要：

气动物流传输系统在医疗、化工等行业得到广泛应用，管道压降和特征速度是竖直管气动物流传输系统设计的关键参数，但目前相关报道很少。基于实验室自主搭建的竖直管气动物流传输系统，开展压缩气流输送传送瓶实验，进行输送特性分析以及管道压降和特征速度的建模研究。首先借助压降信号分析、高速摄像与数据处理等方法，分析了传送瓶输送特性，提出了基于管道压降信号分析的传送瓶运动状态识别方法；其次综合考虑流道结构特征，建立了竖直管气动物流传输系统的管道压降模型，并通过数据回归获得了管道阻力系数；最后基于力平衡分析、机械能守恒定律建立了竖直管气动物流传输系统特征速度的预测模型，为传送瓶状态识别及追踪监测提供了一种新方法。

关键词: 气动物流传输, 管道压降, 特征速度, 多相流, 气力输送, 流体动力学