| 摘要: |
| 对基于压力信号器控制的贮箱地面增压技术及其在发射场的实际应用情况进行了介绍分析。常温贮箱射前地面增压时间较为宽裕，一般采用单气路单压力信号器控制增压；低温贮箱射前地面增压时间较短，要求较快的增压速率，一般采用双气路双压力信号器控制增压。贮箱射前地面增压存在压力后效，影响压力后效大小的主要因素包括：增压充气流量qm、增压电磁阀动作响应时间Δt、增压电磁阀后供气管路气体容积Vg。发射场实际应用过程中，通过调整供气管路上节流孔板大小控制增压充气流量，使贮箱增压压力后效满足要求。针对压力信号器失效故障模式，通过设置紧急放气电磁阀和冗余设计,实现紧急放气和冗余备保增压，可以确保贮箱射前增压工作正常。 |
| 关键词: 压力信号器 贮箱 地面增压 |
| DOI： |
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| Application Analysis of Tank Ground Pressurization Technology Based on Pressure Switch Control |
| WANG Liang,LI Gen,SUN He,LIU Zhuoran,WANG Hongli |
| (Beijing Institute of Space Launch Technology, Beijing 100076, China) |
| Abstract: |
| This paper introduces and analyzes the ground pressurization technology of tank based on pressure switch control and its practical application in the launch site. For room temperature tank, the time of ground pressurization before launch is relatively abundant, and the pressurization is generally controlled by a single gas path and a single pressure switch. For cryogenic tank, the time of ground pressurization before launch is short, which requires a faster pressurization rate, and the pressurization is generally controlled by double gas paths and double pressure switches. Ground pressurization of tank before firing introduces pressure aftereffect. The main factors affecting the pressure aftereffect include: the gas flow rate of pressurization qm, the action response time of pressurized solenoid valve Δt, the gas volume of supply pipeline after pressurized solenoid valve Vg. In the actual application of the launching site, the size of the orifice plate in the gas supply pipe is adjusted to control the pressurized gas flow, so that the pressurized pressure effect of tank can meet the requirements. For the failure mode of pressure switch, the emergency vent solenoid valve and redundancy design can be used to realize emergency vent and reserve pressurization, which can ensure the normal pressurization of the tank before firing. |
| Key words: Pressure switch Tank Ground pressurization |