负压抽液分装的数学模型

本文介绍了负压抽液分装的数学模型 .由于考虑到所讨论液态物质的渗透性及污染性大等特点 ,采用负压抽液的原理 ,根据能量守恒理论确定抽液所需的负压 (真空度 ) ;根据克拉珀龙方程、分子流运动论的 Knudsen公式等理论 ,确定达到额定压力 (真空度 )所需的时间 (即装置的起动时间 ) .据此设计了一套含有不完全真空保护系统的分装装置 ,用这套装置进行的实验和实际操作 ,其真空度、时间数据与确定值 (计算值 )基本相符 .表明所建立的数学模型正确 ,据此设计的这套装置已成功用于液态物质的分装 .

The Mathematical Model of Negative Suction System for the Standardizing Packaging of the Liquid Materials

In this text is described the mathematical model of negative suction system for the standardizing packaging method of the liquid materials. Considering the penetrability and pollution of the liquids, the principal of the negative suction is used. The vacuum degree which the liquid materials can be drew out from the container is decided by the conservation law of energy. The time which the vacuum degree can reach the decided value (i.e. starting time of the equipment) is calculated by Clapeyron′s equation of gas state, Knudsen theory of molecular flow and etc. And thus is designed a set of standardizing packaging equipment of the liquids with un-entireness vacuum system. The measured data of vacuum degree and time are consistent with the calculated values. The studies show that the mathematical model is correct, and the equipment is successfully used for the standardizing packaging of the liquid materials.