Using only one vibrator which generates a rotating centrifugal force around its
own longitudinal axis transmitting it to the connected structure creating an
elliptical movement (fig. 1).
Using two vibrators with equal features, rigidly fixed on the same plane and
rotating in opposite direction. In this case the centrifugal forces created by
the counterweights generate an unidirectional alternating vibration (fig. 2).
"n" (R.P.M.) and the working moment "M" (Kgmm) are the most
important features of the vibrator. To select the revolution it is important to
consider the type of the application an the type of the material.
3000 R.P.M. vibrators are chosen when a
high frequency and low amplitude are required, generally used to avoid loose
materials clogging in silos, hoppers, etc.
machine has to work in a continuos operating cycle or exceeding 2000 h/year it
is advisable to operate vibrators at not more than 80% of their total
particular applications refer to our Technical Dept.
are two parameters available to modify the efficiency of a vibrating machine:
amplitude can be altered by adjusting the weights only after having stopped the
can be regulated by inserting a frequency changer (inverter). The regulations can then be made when the
motor is running, directly by means of the inverter or by a remote control. It
is also possible to limit the oscillations which occur when the motor is
switched off by using the braking characteristics of the inverter.
selection and the setting of the inverter it is necessary to consider:
vibrators installed on the same machine must start together and be fed by the
important not to exceed the nominal speed of the vibrator, and to avoid
resonance problems, not to operate with less than 50% of this speed.
assure good starting of the motor, we advise to utilize a converter with a
normal capacity, which is 2-3 times as much as the total capacity of all
vibrators installed on the structure.