| 摘要:针对高功率密度柴油机气阀密封锥面因微滑移带来的磨损下陷问题，建立气阀-阀座密封锥面微滑移仿真模型，并通过平台试验验证其仿真精度，探索密封锥面角度、阀盘厚度和颈部圆角对密封锥面微滑移幅值的影响规律。结果表明：密封面锥角对锥面滑移幅值的影响最大，滑移量随密封面锥角增大而显著增大；阀盘厚度对微滑移的影响次之，滑移量随阀盘厚度增大而减小；颈部圆角对锥面微滑移的影响最小，在一定范围内滑移量随颈部圆角增大而增大。 |
| 关键词: 柴油机 气阀 磨损下陷 微滑移 |
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| Influence of Diesel Engine Valve Disc Structure on Micro-Slip of the Sealing Surface |
| ZHU Feng,LI Yaozong,LIU Mengyu |
| National Key Laboratory of Marine Engine Science and Technology， Shanghai 201108， China;Shanghai Marine Diesel Engine Research Institute， Shanghai 201108， China |
| Abstract:Aiming at the problem of wear recession of valve sealing cone surface caused by micro-slip in diesel engines with high power density，a simulation model for air valve-valve seat sealing cone micro-slip was established，and the simulation accuracy was verified by experiments.The effects of sealing cone angle，disc thickness and neck fillet on sliding amplitude of sealing cone surface were investigated.The results indicate that：The cone angle of sealing surface has greatest influence on the slip amplitude of cone surface，and the slip amplitude significantly increases with the increase of the angle；The thickness of valve disc has less effect on the sliding amplitude，the sliding amplitude decreases with the increase of the thickness；The effect of neck fillet on conical surface micro slip is minimal，and within a certain range，the amount of slip increases with the increase of neck fillet. |
| Key words: diesel engine valve wear recession micro-slip |
