液氦传输管线的支撑设计和静力学分析

液氦传输管线是大型氦低温制冷设备高效运行和冷量运输的保障。为了设计出满足工程要求的管线,采用高真空多层绝热能减少管线的漏热。与此同时,选择合适的支撑结构和布置间距对减少漏热和满足强度要求是十分重要的。采用有限元软件ANSYS对液氦传输管线的支撑和补偿件等进行了静力学分析,结果表明:设计的液氦管线每间隔3 m布置一个支撑能很好的满足强度和减少漏热的要求;同时采用的波纹管进行低温应力补偿,对应力集中点进行了分析,模拟结果能满足强度要求,论证了管道设计的合理性和可行性。

Support structure design and statics analysis of LHe transfer lines

The LHe cryogenic transfer lines are critical components of the large cryogenic refigeration equipment to ensure running efficiency and coding transmission.In order to meeting the requirement of the lines design,multi-layer insulation is used to reduce heat leakage in the lines.At the same time,it is very important to choose suitable support structure and the arrangement distance for reducing the heat leakage and meeting the requirement of strength.Static analysis of the support and the compensation were performed by using ANSYS software.The result shows that it can be well meet the requirement of heat leakage and strength by arranging the support structure at intervals of three meters in the lines.The corrugated pipe is employed to compensate the cooling stresses of the whole pipe and analysis the stress concentration is analyzed.The rationality and feasibility of the lines were verified through theoretical analysis and simulation.