针对500MPa活塞式压力计活塞系统设计的要求,对其参数进行理论计算,确定了活塞杆截面直径,活塞杆伸出活塞筒最大长度,活塞筒外径及其与固定套之间的间隙。通过有限元分析软件对设计结果进行分析,结果表明活塞系统设计结果强度可靠。按设计结果制造活塞系统,在研制的500MPa活塞式压力计样机上进行了验证试验,500次加减压试验证明活塞系统运行稳定。对活塞进行不确定度校准,扩展不确定度为0.0038%。说明活塞系统结构设计合理,能够满足实际应用要求。
Abstract
According to the requirements of 500MPa piston pressure gauge piston system design, its parameters are calculated theoretically, and the section diameter of piston rod, the maximum length of piston rod extending out of piston barrel, the outer diameter of piston barrel and the gap between piston barrel and fixed sleeve are determined. The design results are analyzed by finite element analysis software. The results show that the strength of the piston system is reliable. The piston system is manufactured according to the design results, and the verification test is carried out on the self-developed 500MPa piston pressure gauge prototype. The piston system operates stably in the process of 500 times of pressurization and decompression. The uncertainty of piston is calibrated, and the expanded uncertainty is 0.0038%. It shows that the structural design of the piston system is reasonable and can meet the requirements of practical application.
关键词
计量学 /
活塞式压力计 /
有限元分析软件 /
活塞系统 /
压力计量
Key words
metrology /
piston pressure gauge /
finite element analysis software /
piston-cylinder assembly /
pressure metering
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基金
辽宁省教育厅科学研究经费项目(LJKZ0510);辽宁省教育厅科学技术研究项目(J2020106);中国计量科学研究院基本科研业务费项目(26-AKYZZ2007)
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