潤滑剤の機能性を利用した超音波モータの効率・寿命改善

研究了行波型超声波电机的润滑效果。我发现，润滑接触的电机性能，包括效率，速度和扭矩，低于干接触。进一步的研究表明，弯曲振动很容易被润滑剂的存在或高预紧力阻尼，导致电机性能差。我还研究了润滑剂粘度对电机性能的影响。当使用不同粘度的润滑剂时，电机效率没有明显差异，这表明即使在低静预载荷下也不会发生流体动力润滑。结果表明，润滑超声波电机可以在较宽的温度范围内工作，因为电机性能受润滑剂粘度的影响不大。

I investigated the lubricating effect in traveling-wave type ultrasonic motors. I found that the motor performance in lubricated contact, including efficiency, speed, and torque, was lower than that in dry contact. Further studies showed that bending vibration is easily damped by the presence of lubricant or high preload, resulting in poor motor performance.I also studied the effect of lubricant viscosity on motor performance. No distinct difference on motor efficiency can be found when the lubricants with different viscosities were used, which indicates that hydrodynamic lubrication did not occur even under low static preload. The results prove that lubricated ultrasonic motors can work in a wide temperature range, because motor performance is not greatly affected by lubricant viscosity.