月面钻取采样回转齿轮副啮合生热试验研究

针对月面钻取采样装置的回转齿轮副啮合热进行理论分析，依据辐射换热定律建立了理论温升模型；模拟实际月面真空、带载工况并开展试验研究。分析了啮合热在月面高真空环境的制约条件下，向机体外传播的方式、传热途径以及散发不畅时的积聚作用对附近运动副工作特性的影响。研究结果表明：回转齿轮副作为钻具驱动单元动力传递的中间环节，在20Nm负载转矩工况下持续运行40分钟，理论预测最大温升28.66℃，与试验测量的最大温升结果28℃相吻合，充分验证了钻进驱动单元热设计的正确性，准确地识别出回转齿轮副啮合热积聚的潜在风险。

Experimental Study on Heat Generating of a Rotary Gear Pair for Lunar Drilling and Coring Device

Theoretical analysis of meshing heat generated by a rotary gear pair of the lunar drilling and coring device is conducted by establishing a theoretical temperature rise model based on the radiation-conduction heat transfer principle. Numerous experiments are carried out by simulating lunar practical working circumstance of the high vacuum environment and load conditions. Restricted by the high vacuum environment on lunar surface, transmission pattern, thermal transfer route and accumulation effect on vicinal moving joints of the meshing heat by the emanation hamper are analyzed. Research results demonstrate that the maximum theoretical prediction temperature rise of the rotary gear pair, operating over 40 minutes under 20Nm load torque as the intermediate section of a power transmission in drill tool’s driving mechanism, is 28.66℃, which is coincident with that of the experimental measurement 28℃, adequately proving the correctness of the thermal design of the drill tool driving mechanism and precisely recognizing the potential risk of the accumulative meshing heat.