Vibration attenuation on vacuum cleaner by rubber mount
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Date
2018-06
Authors
Yeoh, Sze Chee
Journal Title
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Abstract
Noise produced by a household vacuum cleaner is generally built of airborne
and structure-borne noise. Isolation of vibration transmitted from the electric motor
blower of a vacuum cleaner to the other part of vacuum cleaner also can reduce the
transmission of noise. To attenuate the vibration magnitude of household vacuum
cleaner, a rubber mounting system is implemented onto the motor housing assembly.
Thus, modal analysis is carried out to identify the structural characteristic of electric
motor blower and vacuum cleaner. Furthermore, dynamic properties such as loss factor
and frequency dependent stiffness are the important parameters to select the most
suitable rubber mount. Thus, impact testing is carried out to obtain the receptance
function of each individual rubber mount. As the interest is to decrease vertical and
horizontal acceleration, a rubber mounting system is proposed onto the motor housing
assembly with a suitable rubber mount based on its dynamic characteristics. There are
three configurations to study the effectiveness of rubber mounting technique in reducing
vibration magnitude. In result, for configuration A, the horizontal acceleration is
decreased by 7.06% while vertical acceleration is reduced by 22.99%. Following with
configuration B, the horizontal acceleration is reduced by 28.66% while vertical
acceleration is dropped by 20.55%. Last but not the least, for configuration C, horizontal
and vertical acceleration are reduced by 36.33% and 14.33% respectively. In short, the
vibration magnitude of vacuum cleaner is effectively reduced in both horizontal and
vertical directions. Hence, the proposed rubber mounting is an appropriate method in
reducing the vibration transmitted from the electric motor blower.