回转窑等转筒设备传动开式齿轮的研究(Ⅰ)——现行渐开线齿轮副齿形参数利弊分析

从回转窑等转筒设备传动齿轮副渐开线齿形发展过程入手,分析现行的不变位理念(x_1=x_2=0)、固定变位理念(x_1=0.4,x_2=0或x_1=x_2=0.5)、大变位理念(x_1≥0.5,x_2≥2.5,Δ_η≤0.01)、相近小变位理念(x_1≈x_2<0.5)及斜齿轮的利弊。通过数据对比和分析得出结论:回转窑等转筒设备传动齿轮副渐开线齿形参数设计的发展历程都是以滑动率差"趋近于0"为目标;不变位齿轮除重合度较高外,在轮齿接触强度、抗弯强度、滑动磨损等方面没有优点可言;固定变位(x_1=0.4,x_2=0或x_1=x_2=0.5)齿轮,虽然滑动率差小于不变位齿轮,但存在先天性的较大滑动率差;大变位齿轮齿厚较厚、弯曲强度较高,但加工难度大、容易形成根切,还存在重合度小的问题;相近小变位齿轮通过合理分配变位系数,可以获得极小的滑动率差,而且具有较高的重合度;斜齿轮只能适用于能够承受轴向力的回转窑等转筒设备,不具有普遍适用性。

From the development process of drive gears involute for rotary kiln and other drum equipment, the current position of the zero displacement （x1=x2=O）, the concept of the fixed displacement （xl=0.4,x2=0 or x1=x2=0.5）, the concept of the large displaeements（x1 ≥ 0.5, x^2≥ 2.5,Δ_η≤ 0.01）, the concept of near small displacement （x1≈ x2〈0.5）, the advantages and disadvantages of helical gear were analyzed. By comparison of the data and analysis, it was concluded that the course of development on design parameters for transmission gears involute of rotary kiln drum equipment were based on the goal which was a sliding rate differential tending to zero. In addition constant bit high gear coincide, there was no advantages for tooth contact strength, bending strength and sliding wear. For a fixed displacement gear, although the difference was less than constant bit rate sliding gear, but it existed congenital large slip ratio difference. The large displacement gear tooth had large thickness and high tlexural strength, but the process was difficult and to form and easy to undercut, and it still existed a small degree of coincidence problem. The rational allocation modification coefficient for near small displacement gear, tiny slip ratio difference as well as a high degree of coincidence could be get. The helical gear was only applicable to bear axial force for rotary kiln drum equipment, and did not have common applicability.