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
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
Applications 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
Operating pressure: 200 kPa to 600 kPa
Ambient temperature: -20ºC to 120ºC
For more information on Pneumatic Turbine Vibrators - NCT Series, please click here.
Vibration Systems & Solutions | Flow Aid Solutions
For over 40 years we have supplied flow aid solutions to keep product moving from hoppers, bins and chutes. Whether pneumatic rotary, pneumatic linear or electric rotary, the right vibrators, mounted correctly, will give just the right force to move your product smoothly and effectively. Damage to bins is eliminated and a continuous flow of product is assured. Nothing is added to your product stream, as in the case with air injection devices.
Operator "damage" is eliminated with no more hammer swinging, and noise is down to acceptable levels with most vibrators, usually far lower than noise levels of other flow promoting devices.
Vibrator mounting is non-invasive and doesn't require the cutting of your bins, with the subsequent clean up costs and risk of product contamination. There is no need for installation technicians to enter the hopper. Vibrators can often, depending upon the product, be installed without any interruption to your process.
Many types of vibrators are also used as drives for vibrating feeders and vibrating tables, especially pneumatic linear models which have very good control features.