液压与气动2025，Vol.49Issue(7)：33-42,10.DOI:10.11832/j.issn.1000-4858.2025.07.004
起落架减震支柱T形静密封性能仿真分析
Performance Analysis of T-shaped Static Sealing of Landing Gear Shock Strut
摘要
Abstract
The oil-gas shock absorber strut plays a vital role in an aircraft's landing gear,its sealing performance directly impacts the shock absorption efficiency and safety during takeoff and landing.T-shaped sealing ring is commonly used for sealing the shock absorber struts of landing gear.A static sealing model of the T-shaped sealing ring is established using the MSC.MARC finite element software,simulating the assembly and compression process.This simulation produces detailed contours of the sealing ring's surface contact stress,Von Mises stress,and strain.The effects of changes in the seal's structure,compression ratio and working pressure on sealing performance are analyzed.The results show that:when the fillet radius where the T-shaped rubber meets the retaining ring is less than 0.9 mm,the rubber experiences self-extrusion;increasing the fillet radius to over 1.2 mm eliminates this issue and reduces Von Mises stress at that point.Changes in the fillet radius have minimal impact on the sealing's surface contact stress.Reducing the compression ratio from 26.84%to 19.82%decreases respectively the sealing's surface contact stress and effective sealing width by 9.22%and 23.15%.By lowering the sealing groove height while ensuring the retaining ring and T-shaped rubber could still be assembled,the minimum compression ratio achieved is 14.56%.Even as the operating pressure rises to 50 MPa,causing the maximum surface contact stress on the sealing surface to surge by 238.82%and the effective sealing width to drop by 8.45%,the seal remains effective in containing the oil.关键词
减震支柱/T形密封圈/静密封/装配模拟Key words
shock strut/T-shaped sealing ring/static sealing/assembly simulation分类
机械制造引用本文复制引用
黄廷朕,潮群,刘成良,许敏,吴轩,罗皓..起落架减震支柱T形静密封性能仿真分析[J].液压与气动,2025,49(7):33-42,10.基金项目
国家自然科学基金(52475064) （52475064）
上海商用飞机系统工程联合研究基金(CASEF-2023-AM11) （CASEF-2023-AM11）
