Transactions of Nanjing University of Aeronautics & Astronautics
Pressure Distribution in Gas Film in Traveling Wave Rotary Ultrasonic Motor
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Abstract:
The current research on gas film is mainly in various precision instruments and machinery while the studies on gas film in ultrasonic motor is few. Based on original N-S equations, the mechanism of gas film action in traveling wave rotary ultrasonic motor (TRUM) is explored through physical explanations and analyzed through numerical simulation. Pressure distributions in the smooth gas film and the gas film considering stator teeth are analyzed. It is concluded that the squeeze number and the non-dimensional amplitude are the main factors that affect the pressure distribution. As the approximate region becomes smaller, the pressure peak of the smooth gas film is close to an atmosphere. The pressure on tooth region is the same as that on smooth model while the region between teeth affects weakly on the whole model.
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Project Supported:
This work was supported in part by the National Basic Research Program of China (No. 2015CB057501).
Clc Number:
V215.3
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