采用红外高温计对喷油润滑人字齿轮横向温度场的测量与误差分析。

School of Mechanical Engineering, Northwestern Polytechnical University, 710072 Xi'an, China.

Rev Sci Instrum. 2023 Feb 1;94(2):024902. doi: 10.1063/5.0098729.

Frictional power losses of high-speed and heavy-load herringbone gearboxes increase the temperature of the gearbox. Thus, real-time surface temperature measurement is significant for evaluating the gearbox lubrication design. A rotating gear test rig with an infrared pyrometer is developed in this paper to conduct real-time and accurate temperature measurements of the transverse plane of the oil-jet-lubrication herringbone gear. First, the influencing factors and measuring errors of surface temperature are analyzed using the infrared pyrometer. The emissivity of the measured surface of a gear tooth painted with matte black is experimentally calibrated. Second, the temperature measurement tests of the oil-jet-lubrication herringbone gear under different conditions are carried out. Measurement errors resulting from purge air pressure, purge air temperature, and oil-jet temperature are also experimentally studied. The results indicate that the purge gas flow can reduce the measurement errors of the infrared pyrometer resulting from oil mist with an appropriate purge air pressure and purge air temperature. Finally, a mathematical curve-fitting of the measurement results between the infrared pyrometer and thermocouple is carried out. The calculated temperatures by the curve-fitting formula are compared with the measured thermocouple temperature, with the relative differences being less than 1 °C. Thus, the curve-fitting formula is credible for the real-time measurement of surface temperature, while the relevant measuring method is also valuable for engineering applications of high-speed gear systems under oil-jet-lubrication conditions.

高速重载人字齿轮箱的摩擦功率损耗会升高齿轮箱的温度。因此，实时表面温度测量对于评估齿轮箱的润滑设计具有重要意义。本文开发了一种带有红外测温仪的旋转齿轮测试台，用于对喷油润滑人字齿轮的横截面上的温度进行实时、精确的测量。首先，利用红外测温仪分析了表面温度的影响因素和测量误差，并通过实验校准了涂有无光黑漆的齿轮齿面的发射率。其次，进行了不同条件下喷油润滑人字齿轮的温度测量试验，还研究了吹扫气压、吹扫空气温度和油喷温度引起的测量误差。结果表明，适当的吹扫气压和吹扫空气温度下的吹扫气流可以减小红外测温仪受油雾影响的测量误差。最后，对红外测温仪和热电偶的测量结果进行了数学曲线拟合。通过曲线拟合公式计算得到的温度与热电偶测量得到的温度进行了比较，相对差值小于 1°C。因此，该曲线拟合公式可用于实时表面温度测量，相关测量方法对于喷油润滑条件下的高速齿轮系统的工程应用也具有重要价值。