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 Roller Vibrators - NCR Series
- Rotary vibration
- Nominal frequency from 10,140 min??1 to 34,300 min-1
- Centrifugal force from 878 N to 9,100 N
- Frequency continuously adjustable via air pressure
- Suitable for aggressive environmental conditions
- Suitable for temperatures up to 200°C (HT Models)
Pneumatic roller vibrators series NCR are particularly suitable for the elimination or reduction of friction. They can be used for emptying bunkers and preventing adhesion to pipes and plates. Special features of the NCR vibrators are very high frequencies and high centrifugal forces.
Construction and working principle
The rotary vibration is created by the high centrifugal force of a circulating steel roller, which runs on a steel ring at very high frequency. The frequency, and hence the centrifugal force, can be continuously regulated via the operating pressure. Series NCR roller vibrators can be operated using lubrication-free compressed air.
A multi-directional valve is required for operation (not supplied).
Permissible Operating Conditions Drive medium:
Compressed air or nitrogen (filter ≤ 5μm) preferably with oil mist
200 kPa to 600 kPa
-20°C to 120°C
HT version for temperatures up to 200°C
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