某混合动力变速箱主减齿轮点蚀仿真分析及优化

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Simulation Analysis and Optimization of Pitting of Main Reduction Gear in a Hybrid Power Transmission Box

Zhang Qing Jiangling Motors Co.，Ltd.，Nanchang，Jiangxi Province 240624，China

Abstract：Withtherapiddevelopmentofhybridelectricvehiclesandtherapidgrowthofmarketownership，thepitingfailure issueofthemainreductiongearinthehybridtransmisiontheyareequippedwithunderhigh-frequencyvariableoadsandmulti-conditionswitchinghasbcomethecorebotleneckrestrictingsystemreliability.Takingthemainreductiongearofahybridtransmissionas theresearchojet，tispaperproposssolutiosfromaspectssuchsaterialandsurfacetreatmentotiization，ubricatioroe ment，andmicro-modifcationparameters.Theefectivenessoftheimprovementmeasuresisverifiedthroughexperimentsandsimulations，providing a theoretical basis and engineering reference for the reliability design of hybrid transmissions.

Key words：Hybrid transmision;Mainreduction gear;Pitingfailure;Optimizationanalysis;Toth profile modification;Fatigue life

1前言

混合动力系统通过内燃机与电机的动力耦合，实现燃油经济性提升 30% 以上，但主减齿轮作为动力传递的“最后一公里”核心部件，面临比传统变速箱更严苛的工况挑战：低速大扭矩（峰值扭矩达 315N⋅m， ）、高频启停（城市工况启停15次 /min ）、混动模式切换时的扭矩冲击（波动幅度 ±20% ），导致齿面接触应力循环频次较传统齿轮提升 40% ，点蚀失效风险显著加剧。（剩余4786字）