Vibration and Noise Characteristics of Elliptical Gears due to Non-Uniform Rotation

作者：Liu Xing^*; Nagamura Kazuteru; Ikejo Kiyotaka

来源：Journal of Advanced Mechanical Design Systems and Manufacturing, 2012, 6(4): 498-512.

DOI：10.1299/jamdsm.6.498

• Gear
• Elliptical Gear
• Non Uniform Rotation
• Vibration
• Noise
• Tooth Separation
• Tooth Impact
• Frequency Analysis

Elliptical gear is a typical non-circular gear, which transmits a variable-ratio rotation and power simultaneously. Due to the non-uniform rotation, the vibration and noise of elliptical gears demonstrate particular characteristics which should be paid attention to in practical application. In this paper, two elliptical gears, which are a single elliptical gear and a double elliptical gear, have been investigated to analyze the vibration and noise characteristics of elliptical gears. The corresponding circular gears for comparison are also investigated. General factors including the torque, the rotation speed, the gear vibration acceleration and the gear noise of the four test gears are measured by running test. The root mean square of the Circumferential Vibration Acceleration (CVA) and the sound pressure level of the noise of elliptical gears are obtained from the measured results and compared with those of circular gears to clarify the vibration and noise characteristics of elliptical gears. Furthermore, the frequency analysis of the CVA of elliptical gears is conducted by Fast Fourier Transform Algorithm (FFT) and compared with that of circular gears. The main vibration component of elliptical gear is uncovered according to the obtained frequency spectra. In addition, the Critical Rotation Speeds of Tooth Separation (CRSTS) of elliptical gear is obtained and its relation with load torque is unveiled.

• 出版日期2012