In the former model a ball is rotated by air pressure around the inside of a hardened steel race to give an out of balance force. The speed of rotation and the force output are varied by changing the inlet air pressure. This principle also applies to the roller type. In the turbine, an out-of-balance turbine is held in bearings while being rotated. In this case there is no metal to metal contact which gives a much quieter operation with no lubrication required.
Again, varying the air inlet pressure will change the frequency and force.
Pneumatic Turbine Vibrators - NCT Series
- Rotary vibration
- Unrestricted, lubrication-free operation
- Nominal frequency from 4,900 min-1 to 45,460 min??1
- Centrifugal force from 288 N to 8,659 N
- Frequency continuously adjustable by means of air pressure
- Reduced noise level
- Maintenance-free due to continuously lubricated rolling bearing
- Available in ATEX conform or in stainless steel versions
Series NCT pneumatic turbine vibrators are particularly suitable for moving bulk materials. They can be used for emptying bunkers, driving chutes, sieves and vibrating tables and for the mechanical stimulation of processes. Special features of the NCT vibrators are high frequency at low noise level and low air consumption.
Design and functioning principle
The rotary vibration is produced by an eccentrically mounted turbine with integrated unbalance masses. The frequency and therefore the centrifugal force can be continuously regulated via the operating pressure. A directional control valve is necessary for operation (not supplied).
ATEX conform series NCT turbine vibrators and units with stainless steel housings are available.
Permissible operating conditions Drive medium:
Compressed air or nitrogen (filter ≤ 5μm), preferably with oil mist
200 kPa to 600 kPa
-20ºC to 120ºC
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