流体机械2025，Vol.53Issue(6)：31-38,8.DOI:10.3969/j.issn.1005-0329.2025.06.005
航空发动机燃油泵用机械密封多物理场耦合分析
Multi physics field coupling analysis of mechanical seals for aviation engine fuel pumps
摘要
Abstract
Aiming at the problem of seal failure caused by thermal deformation of an aero-engine fuel pump under extreme conditions such as high temperature and high speed,this study establishes a thermal-fluid-solid interaction model for an upstream pumping mechanical seal based on the mechanical seal structure of an afterburner fuel pump.Professional computational fluid dynamics software and a thermal-fluid-solid coupling platform are employed to calculate the stress and strain on the seal rings under extreme conditions.The influences of varying operating parameters—rotational speeds ranging from 20 000 to 40 000 r/min and pressure differences from 0.5 to 9 MPa—on the stress and strain of the mechanical seal rings are analyzed.Results indicate that when the liquid film thickness on the seal face is 2 μm,the spiral groove depth is 6 μm,the number of grooves is 12,and the spiral angle is 18°(serving as baseline parameters),both the dynamic and static seal rings experience measurable stress and strain as the rotational speed increases.Notably,the maximum stress and deformation of the dynamic ring exceed those of the static ring,with the maximum deformation difference between the two rings reaching 2.5 μm.As the sealing pressure difference increases,the stress and strain values of the seal rings increase linearly.However,the seal rings exhibit low sensitivity to pressure changes:for every 1 MPa increase in pressure difference,the strain increases by approximately 0.02 μm,and the maximum stress increases by approximately 0.3 MPa.Under all tested operating conditions,the seal rings generate corresponding stress and strain.Therefore,during the design and calculation processes,the impact of these stresses and strains on overall sealing performance must not be overlooked.The research results can provide valuable references for multi-physical field coupling calculations of upstream pumping mechanical seals under extreme conditions.关键词
机械密封/上游泵送/应力应变/热流固耦合Key words
mechanical seals/upstream pumping/stress strain/thermal-fluid-solid interaction分类
通用工业技术引用本文复制引用
梁彦兵,丁思云,杨博峰,刘杰,彭骞,谢星,王永乐..航空发动机燃油泵用机械密封多物理场耦合分析[J].流体机械,2025,53(6):31-38,8.基金项目
国家重点研发计划(2023YFB3406300) （2023YFB3406300）
合肥通用机械研究院有限公司青年科技基金项目(2023010783) （2023010783）
中国机械工业集团有限公司青年科技基金项目(QNJJ-ZD-2023-09) （QNJJ-ZD-2023-09）
