航空发动机用W形金属封严环结构优化设计
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摘要
为提高航空发动机W形金属封严环的密封性能,以某W形金属封严环为研究对象,建立金属封严环二维轴对称有限元模型,通过轴向刚度仿真与试验验证了仿真模型的正确性。利用ANSYS软件APDL语言和参数化技术对金属封严环结构尺寸进行参数化建模,以增大封严环与法兰间的接触应力为目标,利用ANSYS零阶优化算法对金属封严环进行结构参数优化,得到了其最优截面尺寸。结果表明:优化后W形金属封严环壁厚和波高有所减小,而最大接触应力提高了8.8%,最大Von-Mises应力降低了4.3%,因而可提升金属封严环密封性能和使用寿命;优化后W形金属封严环轴向刚度仅降低3.2%,对其力学性能影响不大。
In order to improve the sealing performance of metallic W-ring used in aviation engine,taking a metallic W-ring as research subject,a two-dimensional axisymmetric finite element model was established,and the correctness of the simulation model was verified by the simulation and experiment of the axial stiffness.The APDL language and parametric technique in ANSYS were used to parameterize the design dimensions of the W-ring structure.With the purpose of increasing the contact stress between the sealing ring and the flange,the structural parameters of the metal sealing ring was optimized by using the ANSYS zero-order optimization algorithm,and the optimum cross-sectional dimensions were obtained.The results show that after optimization,the wall thickness and the height of the metallic W-ring are reduced,while the maximum contact stress is increased by 8.8%,the maximum Von-Mises stress is reduced by 4.3%,so the sealing performance and service life of metal sealing ring can be improved.After optimization,the axial stiffness of the metallic W-ring is decreases by only 3.2%,which has little effect on the mechanical properties.
In order to improve the sealing performance of metallic W-ring used in aviation engine,taking a metallic W-ring as research subject,a two-dimensional axisymmetric finite element model was established,and the correctness of the simulation model was verified by the simulation and experiment of the axial stiffness.The APDL language and parametric technique in ANSYS were used to parameterize the design dimensions of the W-ring structure.With the purpose of increasing the contact stress between the sealing ring and the flange,the structural parameters of the metal sealing ring was optimized by using the ANSYS zero-order optimization algorithm,and the optimum cross-sectional dimensions were obtained.The results show that after optimization,the wall thickness and the height of the metallic W-ring are reduced,while the maximum contact stress is increased by 8.8%,the maximum Von-Mises stress is reduced by 4.3%,so the sealing performance and service life of metal sealing ring can be improved.After optimization,the axial stiffness of the metallic W-ring is decreases by only 3.2%,which has little effect on the mechanical properties.
引文
[1]沈虹,郑天慧,陈玉洁.航空发动机封严技术的进展[J].燃气涡轮试验与研究,2011,24(4):51-55.SHEN H,ZHENG T H,CHEN Y J.Improvement of aero-engine sealing technology[J].Gas Turbine Experiment and Research,2011,24(4):51-55.
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[8]索双富,邢敏杰,薛庆,等.W形金属密封环轴向刚度影响因素研究[J].润滑与密封,2016,41(2):14-17.SUO S F,XING M J,XUE Q,et al.Research on Effect Factors of Axial Stiffness of Metallic W-ring[J].Lubrication Engineering,2016,41(2):14-17.
[9]ZHAO H,CHEN R,LUO X,et al.Metal sealing performance of subsea X-tree wellhead connector sealer[J].Chinese Journal of Mechanical Engineering,2015,28(3):649-656.
[10]秦桦,安晨,徐健,等.水下采油树油管悬挂器K形金属密封环密封性能模拟分析[J].中国海上油气,2017,29(5):141-148.QIN H,AN C,XU J,et al.Simulation analysis of sealing performance of the K-type metal sealing ring on subsea christmas tree tubing hanger[J].China Offshore Oil and Gas,2017,29(5):141-148.
[11]林琦,黄晋英,李超.基于APDL对某装甲车加强筋的综合优化[J].内燃机与配件,2015(2):36-40.LIN Q,HUANG J Y,LI C.A Comprehensive optimization of an armed vehicle stiffeners[J].Internal Combustion Engine&Parts,2015(2):36-40.
[2]TAYLOR D D.Sealing ring with e-shaped radial section:3192690[P].1965-01-03.
[3]MORE G,DATTA A.Ultra high temperature reslient metallic seal development for aero propulsion and gas turbine applications[C]//Proceedings of AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.Huntsville:AIAA/ASME/SAE/ASEE,2003:359-370.
[4]SARAWATE N,WOLFE C,SEZER I,et al.Characterization of metallic W seals for inner to outer shroud sealing in industrial gas turbines[C]//Proceedings of ASME Turbo Expo 2012,Copenhagen:ASME,2012:1855-1862.
[5]龚雪婷,蔡纪宁,张秋翔,等.金属W形密封环的弹塑性接触有限元分析[J].润滑与密封,2010,35(11):82-85.GONG X T,CAI J N,ZHANG Q X,et al.Elastoplastic contact finite element analysis of metal W-sealing ring[J].Lubrication Engineering,2010,35(11):82-85.
[6]DING X Y.The preliminary exploration to design rules of W-Type metallic sealing ring[J].Applied Mechanics&Materials,2015,727/728:421-425.
[7]姜旸,索双富,魏云峰,等.W形金属密封环工作状态下的力学状态分析与回弹性能研究[J].润滑与密封,2018,43(3):31-36.JIANG Y,SUO S F,WEI Y F,et al.Research on working state stress and compression recovery performance of metallic W-sealing ring[J].Lubrication Engineering,2018,43(3):31-36.
[8]索双富,邢敏杰,薛庆,等.W形金属密封环轴向刚度影响因素研究[J].润滑与密封,2016,41(2):14-17.SUO S F,XING M J,XUE Q,et al.Research on Effect Factors of Axial Stiffness of Metallic W-ring[J].Lubrication Engineering,2016,41(2):14-17.
[9]ZHAO H,CHEN R,LUO X,et al.Metal sealing performance of subsea X-tree wellhead connector sealer[J].Chinese Journal of Mechanical Engineering,2015,28(3):649-656.
[10]秦桦,安晨,徐健,等.水下采油树油管悬挂器K形金属密封环密封性能模拟分析[J].中国海上油气,2017,29(5):141-148.QIN H,AN C,XU J,et al.Simulation analysis of sealing performance of the K-type metal sealing ring on subsea christmas tree tubing hanger[J].China Offshore Oil and Gas,2017,29(5):141-148.
[11]林琦,黄晋英,李超.基于APDL对某装甲车加强筋的综合优化[J].内燃机与配件,2015(2):36-40.LIN Q,HUANG J Y,LI C.A Comprehensive optimization of an armed vehicle stiffeners[J].Internal Combustion Engine&Parts,2015(2):36-40.