ITALVIBRAS
97
100
10
1
0
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
3000
3600
r=5
r=3
98,00
96,00
94,00
92,00
90,00
88,00
86,00
84,00
82,00
3,0
3,2
3,4
3,6
3,8
4,0
4,2
4,4
4,6
4,8
5,0
5,2
5,4
5,6
5,8
Mechanical insulation of the vibrating equipment from the bearing struc-
ture sizing the elastic systems
If free oscillation systems are used, it is advisable to fit anti-vibration mounts (such as helical steel springs, rubber supports or
pneumatic actuators) to allow the vibrating machine to freely move in all directions.
Do not use connecting rods, leaf springs or flat springs, etc., for free oscillation systems.
The non-vibrating element must be of adequate capacity, able to bear a weight equal to total weight «Pt» (i.e. the sum of the
weights of the elastically insulated machine, or the electric vibrator or vibrators «Pv» and the material bearing on the machi-
ne itself «Ps») multiplied by the factor of safety, the value of which is between 2 and 2.5. Capacity «Q» of the elastic element
will therefore be:
Q
kg
=
x 2,5
Pv + Ps
N
Pv =
total weight of the vibrating complex (Kg)
Ps =
static weight of material on machine (Kg)
N =
number of anti-vibration mounts
Where
Flexion f (mm) of the elastic system
Diagram A
Electric vibrator rpm
Diagram B
Percentage of insulation I%
Resonance ratio
r