Electric Rotary Bin Vibrators
here for other vibrators
the Proper Syntron Rotary Bin Vibrator
In order to move material in a bin or
hopper, the friction between the material and the bin wall must be broken.
Once the friction is broken, the material cannot cling to the sides of the
bin and it will flow out through the discharge. For most applications, the
vibrator force needed to accomplish this simply calculated as follows:
||Calculate the weight of the material
in the transition or sloping part of the bin. Normally, this is the
only place where the friction between the material and the bin side
has to be broken. Do not calculate the total weight, only what is in
the transition part of the bin.
||For conical bins, calculate as
.261 x dia.^2 x height x material density in lb/ft^3 (kg/m^3)
||For rectangular bins, calculate as
Length x width x height x 1/3 x material density
When the weight (lb) has been
calculated, divide the weight by 10 to get the force or impact needed from
the vibrator (lbf). If the weight is calculated in kg, divide the weight by
1.02 to get the force or impact needed from the vibrator (N). For example:
The conical part of a 25-ton bin contains 7000 lb Divide 7,000 by 10 to get
the force (lbf) or impact needed from the vibrator. Find a suitable vibrator
on pages six or nine.
considerations when sizing vibrators to bins:
||If bin side angle is less than 30
degrees, select larger vibrator.
||If bin has vertical section, select
a larger vibrator.
||If bin wall is extra thick (see
tables pages 5,6, and 8), select a larger vibrator.
||On very sticky and hard to move
materials, it is better to use two small vibrators instead of one
large one (size the two smaller ones by dividing the required force
Tables for Packing Materials
respond best to high-frequency vibration (3600 rpm of more), while light,
fluffy or flaky materials respond best to low-frequency vibration (1800 rpm
For packing or
settling materials, use a vibrator with an impact force of one-and-a-half to
two times larger than the weight of the material plus container. Find a
suitable vibrator in the tables on pages six or nine.
self-cleaning screen, use a vibrator with a centrifugal force (impact) four
times the weight of the material plus the weight of the screen.
lumpy, sticky or wet materials respond best to high-frequency vibration;
powdery and dry materials to low-frequency vibration.
"slump" concrete, use a vibrator with the same force (impact) as
the weight of concrete and form. For one- to two-inch slump concrete, and
additional 30 to 50 percent impact is needed. For dry mixes (zero slump)
increase the impact by 100 to 200 percent.
required of the vibrator is equal to the weight of the chute plus the
vibrator plus the maximum material in the chute.
Electric Rotary Bin Vibrator RPM Selection Guide