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Investigation of the Thermal Behaviour of Non-metallic Curved-Face-Width Spur Gears

机译：非金属曲面宽正齿轮的热行为研究

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摘要

This paper describes a curved-face-width spur gear, specially designed for manufacture from non-metallic materials. The benefits of this gear are the higher contact ratio, bending and Hertzian contact resistance, and greater tooth stiffness compared to standard spur gears. A modified geometry is proposed for the gear tooth, the height of which varies along the gear face width. Due to the reduction in tooth height, in sections away from the gear centre, lower sliding friction is expected, with consequences for the gear's thermal behaviour. The complex gear geometry makes the design of a die difficu therefore the gears were cut on a muling machine, using a special kinematic generation process and related equipment. The tooth flank profile, an involute or near involute in sections away from the gear half-width plane, as well as the flank surface quality determined by the single-cutter tool used for gear manufacture, influence the meshing condition, and can be detrimental to the thermal behaviour of the gear. Experimental tests were carried out to examine the influence of load and speed on the temperature of the curved-face-width spur gears with modified geometry. The measured temperature of the non-standard gear is further compared with the predicted temperature of plastic standard spur gears of the same specification.
机译：本文介绍了一种专为用非金属材料制造而设计的曲面宽度正齿轮。与标准正齿轮相比，该齿轮的优点是具有更高的接触比，弯曲和赫兹接触阻力以及更大的齿刚度。提出了一种用于齿轮齿的改进的几何形状，其高度沿齿轮面的宽度变化。由于齿高的减小，在远离齿轮中心的部分中，预计会有较小的滑动摩擦，从而影响齿轮的热性能。复杂的齿轮几何形状使模具设计困难；因此，使用特殊的运动学生成过程和相关设备在齿轮切割机上切割齿轮。齿面轮廓，远离齿轮半角平面的部分中的渐开线或近渐开线以及由用于齿轮制造的单刀刀具确定的齿面表面质量会影响啮合条件，并且可能对齿轮的热性能。进行了实验测试，以检查负载和速度对具有改进几何形状的曲面宽度正齿轮的温度的影响。将非标准齿轮的测得温度与相同规格的塑料标准正齿轮的预测温度进一步进行比较。

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