1.The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400044, China;
2.Kunming University of Science and Technology, Kunming, 650093, China;
3.CITIC Heavy Machinery Co. Ltd, Luoyang, 471039, China
Abstract：The frequency response and natural frequencies of the gearbox were obtained by modal experimenting based on the experimental modal analysis theory. According to the large speed ratio of 3-stage planetary gearbox, the test scheme of back-to-back power circulation set-up was developed, and the sensor positions and signal acquisition parameter were defined because of the structural characteristic and natural frequencies of the gearbox. The vibration property of the gearbox was analyzed by using the acceleration data tested under rated operating condition. The vibration velocities were calculated by numerical integral method, and the vibration severity was valuated synthetically. The background noise was suppressed effectively by using the acoustic enclosure, and the rationality of noise data was validated, which measured by sound pressure method. The analysis of time-frequency and modulation sidebands showed the gearbox has high machining accuracy. The experimental results indicated that the dynamic performance of main reducer reach the program demands and design goals.
2012, Vol. 31 
