Three-phase rotating electrovibrators
Application:
Electrovibrators: EWe, EWd and EWg are intended for driving
of vibratory implements which serve for consolidation of concrete,
facilitate emptying of silos’ loose materials, for driving of vibratory
conveyors, consolidation of moulding sand etc.
Design, principle of function:
The electrovibrator is a squirrel-cage, three-phase induction motor.
There are fixed excentric out-of-balance weights on shaft ends.
While running, the rotating weights cause oscilations of the entire vibrator.
The oscilating vibrator in turn can set into oscillations the parts which it
is fixed to. An essential advantage of the electrovibrators series
EWe and EWg is the grading possibility of the enforcing strength
at the range: 1,25 kN - 5,0 kN and 1,0 kN - 4,0 kN.
During running of the electrovibrator, it can’t be adjusted.
STANDARD EXECUTION:
> protection degree: IP 44;
> type of duty: S3-40% or S1;
> horizontal working position;
> voltage: 400 V or 500 V;
> frequency: 50 Hz;
> ambient temperature: -20 up to +40°C;
> altitude: up to 1000m above sea level.
Driving implements of coherent structure:
Regarding driving vibratory implements of coherent structure,
the selection of electrovibrators type EWe, EWd and Ewg using
the graph enclosed can be made. Considering the required vibration
or acceleration amplitude, for a known mass of the vibrating part
of the implement the grade of strength is set and after that a fitting nearest grade of force.
Driving implements of supple structure:
Concerning the use of electrovibrators type EWe, EWd and Ewg
for driving vibratory implements containing widespread parts,
such as beams and steel sheets, on which considerable deformations
occur while working, an individual calculation procedure or experience
is required. In these implements resonans appear. If the resonans
is not intended then free - vibration frequency of the implement
should considerable differ from 50 Hz (e.g. free freq. < 30 Hz or free freq.> 70 Hz).
symbol |
rated output [kW] |
synchronous speed [rpm] |
frequency [Hz] |
rated voltage 1 [V] |
current at rated voltage 1 [A] |
weight (IMB3) [kg] |
EWd 32a » |
2.10 |
3000 |
50 |
400 |
3.70 |
82 |
EWd 32b » |
2.10 |
3000 |
50 |
400 |
3.70 |
83 |
EWe 12 » |
0.70 |
3000 |
50 |
400 |
1.2 |
29 |
EWg 1-4/50 » |
0.25 |
3000 |
50 |
400 |
0.58 |
21 |
EWg 22 » |
1.3 |
3000 |
50 |
400 |
2.2 |
44 |
EWg 42a » |
5.3 |
3000 |
50 |
400 |
9 |
145 |
EWg 42b » |
5.3 |
3000 |
50 |
400 |
9 |
146.5 |