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The Experimental Analysis of Aerodynamic Sound for Fan Motor in a Vacuum Cleaner Using Laser 3-D Scanning Vibrometer and Microphone  

Kwac Lee-Ku (조선대학교 대학원 정밀기계공학과)
An Jae-Sin (조선대학교 대학원 정밀기계공학과)
Kim Jae-Yeol (조선대학교 공과대학 기전공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.3, 2005 , pp. 46-51 More about this Journal
Abstract
The vacuum cleaner motor runs at very high speed for suction power. Specially, motor power is provided by the impeller being rotated at very high speed. The centrifugal fan consists of the impeller, the diffuser, and the circular casing. Due to the high rotating speed of the impeller and small gap distance between the impeller and the diffuser, the level of noise in the centrifugal fan is at BPF(Blade Passage Frequency) and its harmonic frequencies. In order to calculate the sound pressure of centrifugal fan, unsteady flow data are needed. The cause of noise is obtained by dividing the fluid noise by exhaust flow of fan and vibration noise by rotational vibration of vacuum cleaner fan motor. Until now, an accelerometer has been used to measure vibration. However, it can not measure vibration in some parts of brush and commutator because of motor construction and 3-D vibrating mode. This study was conducted to perform accurate analysis of vibration and aerodynamic sound for fan motor in a vacuum cleaner using a laser vibration analyzer. A silent fan motor can be designed using the data measured in this study.
Keywords
Fan Motor in Vacuum Cleaner; Laser Vibration Measurement; Aerodynamic Sound; Micro Phone; BPF(Blade Passage Frequency);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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