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Piston Air Vibrators

 

Air-Piston-Vibrators.pngLinear Vibrators generate vibratory force by producing an impact action as a result of a reciprocating piston striking a base plate within a cylindrical housing. The larger the housing diameter and length, the heavier the piston, and the faster it reciprocates — the greater the vibratory force output. Linear Vibration is ideal where a wet bulk material flow problem is best solved by applying force in a directed and concentrated manner to a relatively small surface area, eg, 100 in² to 324 in² area of bin wall, close to the outlet. Linear pneumatic vibrators may operate continuously or be controlled to deliver individual impacts at timed intervals.  Read more »

There are two classifications of piston air vibrators: 1. Direct Impact models which allow the piston to strike the vibrator body or mounting surface directly, or indirectly by transmitting the piston’s force through an intermediate striking element; 2. Reduced Noise models which lower sound levels by cushioning the piston’s impact while still producing useful linear impact force. Air-cushioned model designs prevent metal-to-metal contact by decelerating the piston on a compressed air landing, while baffled designs use resilient plates to absorb a portion of the impact energy. Other models use an elastomer bottom plate or a rubber-tipped piston to soften the stroke, reduce metallic ringing and lower overall dB levels.

Each classification has multiple models that vary in size; mounting style; lubrication needs; noise rating; speed; amplitude; and impact force output based on controlled PSI and CFM supply. Manufacturing method, design, materials used, and finish enable piston vibrators to meet the varied needs of any manufacturing, processing or packaging application, OEM requirement, and environmental demand.

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Types of Piston Air Vibrators

Piston Vibrators – Continuous Direct Impact

Direct-impact vibrators use a pressure actuated piston, contained within a rugged cylinder housing, to directly strike the vibrator's base to transmit impact energy. This type of piston vibrator generates impact via metal-to-metal contact which transmits a shock force directly into the area of the wall of the bin, hopper, chute or railcar to which it is attached. Direct-impact vibrators are offered in Std-efficiency or Hi-efficiency models which differ by speed, air consumption, and noise levels.
Piston Vibrators – Continuous Cushioned (Quiet) Impact

Cushioned Vibrators have a pressure actuated piston, contained within a rugged cylinder housing, which reduces noise levels by 1. Striking a pad of air at one or both ends of the piston's stroke; 2. Using a rubber tip on the strike end of the piston; 3. Internal baffles; 4. Using an elastomer bottom plate. This cushioning provides a quieter impact but still transmits a shock force directly to where it is attached to the wall of the bin, hopper, chute or railcar. These types of vibrators can be set to provide a single impact or repeated impacts, and can be timed or manually operated. These Impactors are typically used for wet, semi-moist and sticky materials because hammer type vibration is less likely than continuous rotary vibration to cause material packing. They are offered in Std-efficiency or Hi-efficiency models depending on plant air availability and noise limitations.

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