液氧加注系统流量计选型及使用

Selection and Application of Flow Sensor for Liquid Oxygen Filling System

液氧作为一种清洁高效推进剂广泛应用于国内外主流运载火箭。为保证液氧加注精度及加注过程安全,液氧加注系统设置了流量计对加注流量进行监测。根据液氧加注系统流量测量需求及使用工况,流量计选型主要考虑的因素包括:1.流量计接液部分材料应满足介质相容性要求,并具有耐低温适应性;2.流量计使用工况存在气液两相流,要求在气液两相流较大流量具有工作安全性和可靠性;3.流量计防爆型式应满足液氧场合使用要求。综合选型要求和行业应用经验,该型号液氧加注系统选用涡街流量计,介绍了流量计使用相关要求和数据采集设置方法。

As a kind of clean and efficient propellant,liquid oxygen is widely used in the world's mainstream launch vehicles.In order to ensure the accuracy of liquid oxygen filling and the safety of the filling process,the flow sensor is set up in the liquid oxygen filling system to monitor the filling flow.According to the flow measurement requirements and working conditions of the liquid oxygen filling system,the main factors to consider in the selection of the flow sensor include:1.The material of the liquid part of the flow sensor should meet the requirements of medium compatibility and have low temperature resistance;2.There is gas-liquid two-phase flow in the working condition of the flow sensor,and it is required to have safety and reliability in the working condition of large flow of gas-liquid two-phase flow;3.The explosion-proof type of the flow sensor should meet the requirements of liquid oxygen applications.Comprehensive selection requirements and industry application experience,vortex flow sensor is selected for the liquid oxygen filling system.At the same time,the relevant requirements of flow sensor use and the method of data acquisition and setting are introduced.