DESIGN AND TESTING OF UNBALANCED MASS MECHANICAL VIBRATION EXCITER

Nitinkumar Anekar, V.V. Ruiwale, Shrikant Nimbalkar, Pramod Rao

Abstract: A vibration exciter is a machine which produces mechanical vibratory motion to which the test object is subjected. This article presents design, construction, performance and testing of mechanical vibrations exciter, which have unbalanced mass to generate uniaxial vibrations. The exciter is designed to produce a given range of harmonic or time dependent excitation force and displacement through a given range of frequencies. The mechanical vibration exciter produces vibrations due to centrifugal force of rotating eccentric mass. The vibrations produced lie in the low frequency range. The construction of working device and its important parts are described here. The most important part of exciter is unbalanced mass attached with rotating disc of motor. Exciter has unbalanced mass at one end of disc, base frame, top plate as platform, springs and motor. This exciter is used for testing of welded parts, consolidation of concrete, concrete filling in mould. The obtained experimental results are in line with theoretical results.

Keywords: Exciters, unbalanced mass, steady state vibration, amplitude, frequency ratio, tests.

DOI: https://doi.org/10.15623/ijret.2014.0308017