王育梁,刘妮,丰佳铭,等.发动机碗形塞结构对密封压力的影响研究[J].内燃机工程,2024,45(1):1-9.
发动机碗形塞结构对密封压力的影响研究
Effects of Engine Bowl Plug Structures on Sealing Pressures
DOI：10.13949/j.cnki.nrjgc.2024.01.001
关键词:碗形塞  过盈配合  密封压力  过盈量  锥度  数值模拟
Key Words:bowl plug  interference fit  sealing pressure  interference amount  taper  numerical simulation
基金项目:潍柴动力股份有限公司科研项目（WCDL-GH-2021-0144）
作者单位邮编
王育梁 北京理工大学 机械与车辆学院，北京 100080 100080
刘妮 潍柴动力股份有限公司，潍坊 261001 261001
丰佳铭 北京理工大学 机械与车辆学院，北京 100080 100080
廖日东 北京理工大学 机械与车辆学院，北京 100080 100080
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摘要:针对碗形塞密封泄漏问题，设计压装试验，与有限元计算相互验证；基于ANSYS工具，在二维模型的基础上，通过仿真计算具体探明并详细分析了碗形塞锥面过盈密封的密封质量与碗形塞结构参数的关系。结果表明：密封面最大压力随碗形塞半径增大而减小，随厚度增大而增大；基于不同过盈量，碗形塞锥面过盈密封可分为上边缘线密封、面密封、下边缘密封3种密封状态；对于D75碗形塞，锥度为1∶20时的最优过盈量区间为0.10~0.14 mm；锥度越大，最优过盈量区间越大。在此基础上，将各规格碗形塞改为锥度1∶10，优化了过盈区间及密封压力，并提出了一种可以增大密封压力和改善压力分布的弧面密封形式。
Abstract:In view of the sealing leakage problem of the bowl plug， the pressure fitting test was designed and verified with finite element calculation. The relationship between the sealing quality of the cone interference seal of the bowl plug and the structural parameters of the bowl plug was specifically explored and analyzed through the simulation calculation based on the ANSYS and the two-dimensional model， through the mutual verification of the press fitting test and the finite calculation. The results show that the maximum pressure on the sealing surface decreases with the increase of the radius of the bowl plug and increases with the increase of the thickness of the bowl plug. Based on different interference amounts， the interference sealing states can be divided into three stages， i.e.， upper edge line sealing， stable surface sealing and lower edge sealing. For the D75 bowl plug， the optimal interference amount range is 0.10~0.14 mm when the taper is 1∶20. The larger the taper， the larger the optimal interference amount range. Based on this， various specifications of bowl plugs were changed to a taper of 1∶10， and the interference amount range and sealing pressure were optimized. Besides， a curved surface sealing form was proposed that can increase sealing pressures and improve pressure distributions.
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