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Maximum
Material* |
CVC Model |
Normal Wall Thickness |
| 1,100 lbs |
RE 0.5-2 |
16-20 gauge |
| 2,200 lbss |
RE 1-2 |
1/8 - 3/16 |
| 4,400 lbs |
RE 2-2 |
3/16 - 1/4 |
| 7,700 lbs |
RE 3.5-2 |
3/16 - 1/4 |
| 13,200 lbs |
RE 6-2 |
1/4 - 3/8 |
| 22,000 lbs |
RE 10-2 |
3/8 - 1/2 |
| 35,200 lbs |
RE 16-2 |
1/2 - 3/4 |
| 50,600 lbs |
RE 23-2 |
3/4 - 1 |
| 66,000 lbs |
RE 30-2 |
1 - 1-1/4 |
| 88,000 lbs |
RE 40-2 |
1-1/4 - 1-1/2 |
| * In sloped Wall Section |
The sizing of rotary electric vibrators is based on the ratio of material weight in the sloped wall section to the force output of the vibrator. For the majority of applications, the ratio should be one pound of vibratory force for every ten pounds of material in the sloped wall section of the hopper.
The 3600 RPM rotary electric vibrator units are used for the majority of applications and are well suited for materials which are in the "free flowing" to "difficult to flow" range. For particularly stubborn materials, the 1800 RPM units will provide greater amplitude than a 3600 unit of the same force output. When selecting an 1800 RPM rotary electric vibrator, use the chart to determine the proper size 3600 RPM vibrator, then select the 1800 RPM unit which develops the same force output.
To determine the weight of material in the sloped wall section, multiply the bulk density of the product by the volume (in cubic feet) of the hopper section.
To calculate the volume of a conical hopper:
1.0472 x vertical height x [R² + (R x r) + r²] = Volume
, where R is the radius of the cone at the transition point and r is the radius of the cone at the discharge.
To calculate the volume of a rectangular or square
hopper:
Vertical height/3 x (B + (B x b)^½ + b) = volume
where B is the area at the transition point and b is the area at the discharge.
Bins and Hoppers
Most bin or hopper applications will require only one rotary electric vibrator. CVC recommends mounting the single drive as indicated in figure 1, locating the unit at a point on the sloped wall section that is 1/3 the height of the wall.
Applications involved with particularly stubborn material or hoppers larger than 100 ton capacity may require two or more vibrators. The recommended mounting is shown in figures 2 and 3. Normally, not more than three rotary electric vibrators would ever be required on a hopper or bin.
Amplitude and Force Requirements
The following formulas should be used in calculating amplitude and force requirements for applications involving rotary electric vibrator equipment.
Amplitude = 70,500 X FORCE / LOAD x (FREQUENCY)²
Force Required = AMPLITUDE x LOAD x (FREQUENCY)² / 70,500
Amplitude is in inches.
Force is in pounds.
Frequency is motor RPM.
Load is in pounds and is defined as total weight of structure, vibrator and material.
For more information or help in sizing or placing the vibrator for your application, contact our sales department at 800-221-3298 or Email us.
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Cleveland Vibrator Company