25°压力角齿轮副传动质量与强度分析
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摘要
文章研究齿轮啮合滑移系数、齿面啮合标志、最大接触压力和网格刚度变化的压力角、齿根应力、影响规律。结果表明,随着压力角的增大,齿轮的弯曲、接触强度和胶合阻力都得到了提高,但超过25°的压力角齿轮强度增加不明显;随着压力角、齿根应力的增大而减小,但经过25°压力角后,齿根应力略有上升;增加压力角会降低齿轮副的总接触比,但能改善齿轮副啮合特性变化率的接触模式和啮合刚度等。文章分析了不同压力角对齿轮接触疲劳强度和弯曲疲劳强度的影响,发现测评过压力角的增加,接触主压力和剪切应力的齿面工作力减少,齿根弯曲疲劳强度会增加,可以提高齿轮副的强度和抗点蚀极为有利,为重载齿轮的设计提供参考。
This paper researches the slip coefficient, the tooth surface meshing gear mesh marks, the maximum contactpressure and pressure angle, the tooth root stress of mesh stiffness change, and the influence law. The results show thatwith the increase of pressure angle, bending and contact strength of gear and agglutination resistance are improved, but itis more than 25° pressure angle of gear strength increase is not obvious; Decreases with the increase of pressure angleand the tooth root stress, but after 25° pressure angle, the tooth root stress increased slightly; Increasing the pressureangle can reduce total contact ratio of gear pair, but it can improve the variation of the gear pair meshing features, thecontact pattern and meshing stiffness, etc. This paper analyzes the different pressure angle on the influence of the gearcontact fatigue strength and bending fatigue strength, and finds that the increasing of the pressure angle, the main contactstress and shear stress of tooth surface reduce the work force, tooth root bending fatigue strength will increase, canimprove the strength of gear pair and pitting and extremely strong, provide reference for the design of gears.
This paper researches the slip coefficient, the tooth surface meshing gear mesh marks, the maximum contactpressure and pressure angle, the tooth root stress of mesh stiffness change, and the influence law. The results show thatwith the increase of pressure angle, bending and contact strength of gear and agglutination resistance are improved, but itis more than 25° pressure angle of gear strength increase is not obvious; Decreases with the increase of pressure angleand the tooth root stress, but after 25° pressure angle, the tooth root stress increased slightly; Increasing the pressureangle can reduce total contact ratio of gear pair, but it can improve the variation of the gear pair meshing features, thecontact pattern and meshing stiffness, etc. This paper analyzes the different pressure angle on the influence of the gearcontact fatigue strength and bending fatigue strength, and finds that the increasing of the pressure angle, the main contactstress and shear stress of tooth surface reduce the work force, tooth root bending fatigue strength will increase, canimprove the strength of gear pair and pitting and extremely strong, provide reference for the design of gears.
引文
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[2]谭伟明.基于正弦齿条的齿轮及其齿廓曲线[J].兰州理工人学学报,2004(3):35-37.
[3]曲秀全,戴恒震.关于渐开线圆柱齿轮重合度的另一种定义方法[J].现代机械,2012(4):46-47.
[4]陈安适,邹慧君,梁锦华,等.逻辑齿轮的重合度及滑动系数研究[J].机械设计与研究,1996(3):28-30.
[5]谭伟明.微线段齿廓齿轮副的重合度[J].机械设计,2014(6):58-60.