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航空发动机用摩擦副 CrMo 铸铁/38CrMoAlA 瞬态磨损-摩擦热耦合仿真分析
Transient Wear-friction-thermal Coupling Simulation Analysis of CrMo Cast Iron/38CrMoAlA Friction Pair for Aircraft Engines
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- DOI:
- 作者:
- 魏建林 1 ， 2 ， 3 ，田 鑫 3 ，杨 勇 1 ， 2 ，李永健 3
WEI Jianlin 1,2,3 , TIAN Xin 3 , YANG Yong 1,2 , LI Yongjian 3
- 作者单位:
- 1. 西北工业大学 凝固技术国家重点实验室，陕西 西安 710072；2. 西北工业大学 先进润滑与密封材料研究中心，陕西 西安 710072；3. 清华大学 高端装备界面科学与技术全国重点实验室，北京 100084
1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 2. Center of Advanced Lubrication and Seal Materials, Northwestern Polytechnical University, Xi'an 710072, China; 3. National Key Laboratory of High-end Equipment Interface Science and Technology, Tsinghua University, Beijing 100084, China
- 关键词:
- CrMo 铸铁； ANSYS ；瞬态仿真； Archard ；摩擦磨损
CrMo cast iron; ANSYS; transient simulation; Archard; frictional wear
- 摘要:
- 为探究航空发动机用摩擦副 CrMo 铸铁 /38CrMoAlA 的摩擦磨损特性，利用 ANSYS 有限元软件建立了面- 面接触的摩擦副模型，开展了瞬态磨损 - 摩擦热耦合仿真分析，阐明了摩擦副的磨损性能演化规律。 仿真计算发现，静环 -CrMo 铸铁摩擦面的外径侧温度和体积磨损量较高。 接触压力对摩擦应力的影响更为显著， 在接触压力为0.02~0.10 MPa ，摩擦线速度 10~30 m/s 时，体积磨损量随接触压力的增大而增大，随摩擦线速度的增大而减小。 体积磨损率的计算值与实验值有相同的变化规律，且数值差异较小，说明磨损模型能较好预测摩擦副的磨损情况。To investigate the friction and wear characteristics of CrMo cast iron/38CrMoAlA friction pairs used in aircraft engines, a surface-to-surface contact friction pair model was established using ANSYS finite element software. Transient wear friction thermal coupling simulation analysis was carried out to elucidate the evolution law of the wear performance of the friction pairs. Simulation calculations reveals that the outer diameter side temperature and volume wear of the static ring CrMo cast iron friction surface are relatively high. The influence of contact pressure on frictional stress is more significant. When the contact pressure is 0.02~0.10 MPa and the friction line velocity is 10~30 m/s, the volume wear increases with increasing contact pressure and decreases with increasing friction line velocity. The calculated value of the volumetric wear rate has the same variation pattern as the experimental value, and the numerical difference is small, which indicates that the wear model can better predict the wear situation of the friction pair.