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一、引言提高齿轮传动的承载能力,延长其使用寿命是冶金机械基础部件发展中的重要课题。在润滑良好的闭式渐开线齿轮传动中,主要的损伤失效形式是齿面疲劳点蚀。对于齿面接触疲劳的计算,多数方法都以赫芝(Hertz)公式为理论基础,将一对齿廓的啮合视为两相应的圆柱体的接触挤压。对铁碳合金材料(波松系数μ=0.3),其最大接触应力为:σ_(kmax)=0.418(gE/ρ)~(1/2)式中 g——单位齿宽载荷;E——两齿轮材料的当量弹性模量;ρ——接触点处的综合曲率半径,ρ=ρ_1·ρ_2/(ρ_2±ρ_1)
I. INTRODUCTION Improving the carrying capacity of gear transmission and extending its service life are important topics in the development of basic components of metallurgical machinery. In a well-lubricated closed involute gear, the main form of damage is tooth fatigue pitting. For the calculation of tooth-surface contact fatigue, most of the methods are based on the Hertz formula and the meshing of a pair of tooth profiles is regarded as the contact-pressing of two corresponding cylinders. For ferro-carbon alloy materials, the maximum contact stress is σ_ (kmax) = 0.418 (gE / ρ) ~ (1/2) where g is tooth load per unit width; Equivalent elastic modulus of gear material; ρ - total radius of curvature at contact point, ρ = ρ_1 ρ 2 / (ρ 2 ± ρ 1)