Industrial Vibrators

NAVCO Pneumatic Piston Vibrators are designed to provide reliable and effective performance when exposed to severe, adverse elements and continuous duty.

NAVCO BH piston vibrator incorporates a nominally sized piston and bore. During operation, compressed air is alternately directed from one end of the piston to the other through a series of internal ports. The piston is the only moving part, which makes the NAVCO BH vibrator a reliable, low maintenance device. The vibrator housing is a one piece, ductile iron casting. This adds to the durability and reliability of NAVCO Pneumatic Piston Vibrators.

The action of the piston in a NAVCO BH pneumatic piston vibrator generates high amplitude vibration with unidirectional, or linear, force vectors. High amplitude characteristics enable the vibrating energy to be transmitted in the capacity required to overcome the strength of the bulk material involved in a bridge (arch) or a rathole (pipe). Other advantages of high amplitude, linear vibrators include low utility consumption and minimum bin wall stress.

 

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Learn how NAVCO Vibrators are commonly used in industry

View Specifications and Dimensions for all BH models

Vibrational effects on storage vessels and discharge theory (pdf)

Learn how to Install and Operate BH Vibrators

There are two basic types of vibration applied as flow aids: Sinusoidal and Impacting.

One vibration type is approximately sinusoidal. Sinusoidal vibration is commonly delivered by rotary vibrators or “silent“ piston vibrators. Rotary vibrators are characterized as high frequency/low amplitude. Pneumatic piston vibrators that are silent or air cushioned can also create sinusoidal output.

The second type of vibration is short time duration impulse or ‘impacting’. This type of vibration is commonly delivered by pneumatic piston vibrators. The impulse is a form of elastic collision between the piston and the base of the bore.

There are inherent advantages and disadvantages to each type of vibration,
especially in particular applications.

Learn more about Sinusoidal vs. Impacting Vibration

Read about: Electric Rotary Vibrators                 Ball Vibrators / Turbine Vibrators

Linear vibration offers the following advantages:

• The work, or energy generated by the vibrator, can be directed normal, or perpendicular, to the flow of the bulk material to address a specific material flow problem. The vibrator work is used very efficiently to reduce the sliding friction angle of the hopper and to overcome the strength of the bulk material in the hopper.
  **These two factors are key to promoting the flow of bulk solid materials .
  
• Vibrators that generate linear vibration do not develop high shearing forces at the bin wall. This allows a simple, more direct approach to mounting the vibrators.
  
• Linear vibration is ideal for driving vibratory feeders and compaction tables too.