Mike Stratis

How Vibration Helps Improve Dust Collection Systems

Mike Stratis
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When it comes to collecting dust created from a production line at a facility, it is critical to clean the existing and recently collected dust out of the collection equipment on a regular basis. One of the methods to remove the collected dust is with the help of vibration. Where the vibration is applied, though, depends on the collection system installed. The common installations that we see are:

• Electrostatic Precipitators (ESP)
• Baghouses
• Cyclones

First, the electrostatic precipitators. These are large systems that are frequently found at facilities like pulp and paper or steel mills, refineries, concrete plants or coal-fired power plants, just to name a few. These systems have a series of wires and plates that act as filters. These filters rely on an electrostatic charge to pull dust particles from the air passing through the collection system. To help the efficiency of the collection of the dust, keeping these wires and plates clean is imperative to the process. This is where a Rapper comes into play. The Cleveland Vibrator 3” PMA Rapper is an air powered piston vibrator that is installed on a mounting plate connected to a shaft to shake the wires and plates. This shaking process breaks the friction of the particulates clinging to the collection media and drops the dust down to the collection hopper underneath. Once the materials is in the collection hopper, an externally mounted piston vibrator or air knocker can help remove the dust from the inside sloped walls of the hopper and to the discharge.

For a helpful visual aid, check out this video on YouTube courtesy of Thermax Global.

For the baghouse collectors, many of them use pulses of air to clean out the hanging bags on the inside of the system to drop the particulate down to the collection hopper below. Once the material reaches the collection hopper, single impact air knockers or piston vibrators can help clean off the inside sloped walls of the hopper to ensure material reaches the discharge outlet or the feeder underneath.

For a video to see this in action, we can thank the people at Astec for putting together this YouTube clip.

Lastly, the cyclones. These systems rely on the shape of the vessel and the directional flow of air pushed into the vessel to spin particulate and create a vortex. The gravity of the particulate helps this material drop to the hopper underneath while the cleaned air, which is lighter in density, exits the exhaust vent at the top of the collector. Similar to the baghouse process, once the dust reaches the hopper bottom, a single impact air knocker or piston vibrator can help move that material out of the hopper and to the discharge below.

Our friends at Aerodyne have posted this video on YouTube to give a demonstration of a cyclone working.

One of the biggest keys to longer lasting equipment is proper maintenance. Installing a rapper or air knocker or piston vibrator can help keep the collectors clean and running as expected.

For more details on what Cleveland Vibrator has to offer for dust collection systems, contact us or give us a call at 800-221-3298. Our team is happy to review your project!

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David Strong

How to Design and Size a Vibratory Feeder Conveyor Based on Application Requirements

David Strong
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Similar to vibratory tables in their many uses and applications, vibratory feeders are also great problem solvers.  Well known for their ability to effective move material from point A to point B, a well-designed vibratory feeder offers flexibility to the end user to get the task done.

vibratory feeder, vibratory conveyor, rendering vibratory feeder

Figure 1. Air Powered Vibratory Feeder Conveyor

Feeders can range from small base mounted CF-A, pneumatic powered feeders moving small quantities dry bulk material in a controlled manner to much larger base or cable supported EMF, Electro mechanical feeder, conveying literally tons of material an hour. Off the top of my head a short list of materials that Cleveland Vibrator’s vibratory feeders have worked with would include: almonds, crushed limestone, shelled corn, powdered metal, metal billets, various pipe fittings, scrap brass and bronze, crushed and shredded automobiles, hot dross and much more.

Typically, a feeder application will require the movement of some given amount of material with a known bulk density over a desired distance. Read More…

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Jack Steinbuch

Can You Operate 460/3/60 Industrial Electric Vibrators at 380/3/50?

Jack Steinbuch
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I’ve noticed an increase in requests for operating stock U.S. rotary electric (motor) vibrators that are wound for 460/3/60 power overseas where the power is often 380/3/50.  The answer to the question is yes and there are two options available.

First, is the realization that you can operate a 460/3/60 vibrator using 380/3/50 power.  My understanding is that the reason it works is due to de-rating the higher voltage 60 Hz motor since 50 Hz power rotates the eccentric weights at a lower RPM (rotations per minute) by a factor of 50/60.  For example, an 1800 RPM vibrator would run at 50/60 x 1800 = 1500 RPM.

This same logic can also be applied to the voltage.  So, a 460 volt motor would be de-rated to 383 volts by multiplying the 60 Hz voltage by the same factor of 50/60.  Therefore, due to 50Hz input, a 60Hz vibrator will accept 380 volts ± 10% without jeopardizing the motor.

However, it is very important to recognize that since the eccentric weights are rotating at a lower RPM, the force output will be reduced by roughly 30%.  Read More…

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Craig Macklin

4 Construction Features to Consider When Choosing Rotary Electric Vibrators for Vibratory Equipment or Material Flow Applications

Craig Macklin
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Have you ever had someone try to push you over from your side?  I recall skiing with my big brother once when we were kids.  We had gotten off the chair lift and were stopped at the top of a run, getting ready to head down.  I was standing with skis closely together in parallel, hands off my poles as I adjusted my goggles. Big brother gave me a push on my shoulder from the side, perpendicular to the direction of my stance and skis.  I tipped right over.  There was nothing I could do about it.  It was hilarious… at least it was to him and everyone watching me flail about wildly on my way down.  Had I positioned my skis and stance wider and center of gravity lower, I could have avoided this embarrassing failure.

rotary electric vibrator, eccentric weights

Figure 1. Rotary Electric Vibrator Shaft

Such is as it is with Rotary Electric Vibratory Motors.  Imagine for a moment that you have a long bar going right through your solar plexus and out of the middle of your back.  Now that you are over that painful thought, imagine that at each end of the bar, there is a weight dangling from rope and swinging around that bar.  Those weights are pushing you in every direction perpendicular to your feet and stance. You are now a Rotary Electric Vibrator! Can’t quite get the mental picture? Check out the photo to the right to see what I am talking about. Read More…

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Mike Stratis

How to Choose the Best Truck & Trailer Vibrator(s) Based on the Material You’re Hauling

Mike Stratis
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Are you hauling a sticky material, such as DDG or soybean meal, in a hopper bottom trailer? Maybe carrying gravel or asphalt in a dump trailer? What about fertilizer in a v-body spreader?

The reason we ask this information when working with clients is because the material characteristics play a major role in determining the best type of vibrator to help quickly and safely unload the trailer. There is a big difference between unloading sticky DDG’s from a hopper bottom trailer compared to cleaning out the hopper bottom that was carrying whole potatoes or other free flowing materials like corn and wheat. Read More…

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David Strong

Installing Vibratory Aids on Equipment: What Are My Options?

David Strong
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It seems to me that most applications start with a problem to solve; improve a process, simplify an operation, increase yield or throughput, or remove a bottleneck.  This problem could be as simple as placing the appropriately size pneumatic piston vibrator on the size of a hopper.  It could entail getting the right air cushioned vibrator such as the 1200 VMSAC or maybe a single impacting SI vibrator along with the matching SMP mounting channel and controls.  Or the problem could be more broad with concerns regarding the process or task to be accomplished and the design envelope into which the solution must fit and then interface with other equipment.

Regardless of the problem, options and choices are always good. 

cleveland vibrator vibrtgory conveyor, electric vibratory conveyor, electric vibratory feederOften with equipment one of the first things that comes up in initial discussions is the design height or discharge height of the unit.  With vibratory feeders (EMF) and screeners (EMS)
there’s always a concern of the product discharge height, as the equipment is often feeding material downstream to other devices.  One of the options that impact the design and therefore the height of the unit is the location of the vibrators.  Typically on vibratory feeders and screeners the default Read More…

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Mike Stratis

Tighten Those Bolts!

Mike Stratis
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If you happened to take the time to read Craig Macklin’s blog, about the expectations for maintenance of the pneumatic vibrators, then you’ll have a good base of knowledge on how to keep those units running efficiently. This time, we’ll take a deeper dive into the importance of tightening the mounting bolts used for installing the vibrators themselves.

On the pneumatic piston vibrators, the proper bolt torque is critical. Because of the tight tolerance held between the outside diameter of the piston and the inside diameter of the bore of the casted body, the vibrator needs to air piston vibrator, nuts and bolts on pneumatic vibratorbe rigidly bolted in place to allow for correction operation so that only the piston is moving inside the vibrator. If the bolts are loose, even slightly, the vibrator body will “rock” back and forth on the mounting channel. Once this starts happening, failures or seized pistons can happen.

Why does this happen? The reason is, the piston will still try to move in a pure linear direction but if Read More…

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Katy Sabo

5 Awesome Things You Need To Know About Industrial Vibration

Katy Sabo
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Working for the Cleveland Vibrator Company, you can imagine how many times I get the question, “what exactly do you mean by vibrators?” It’s a question I answer with great pride and enthusiasm… and maybe add a little bit of humor for good measure. When I go on to explain just how important vibration is across so many industries, the shock factor withers away and people are engaged in the conversation, wanting to learn more about it. There’s a couple of things you should know about industrial vibration and why it may be one of the coolest fields to work in, here’s the short list to get you started:

It’s Diverse – It’s true. Industrial vibrators can be found on the side of bins, hoppers, silos, barges
and on screening, conveying and compaction equipment. Have you passed a large dump truck lately on the highway? I’d venture to bet there may be a DC vibrator hiding away underneath the body Read More…

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Mike Stratis

Properly Size an Industrial Vibrator on a Bulk Barge Hopper in 3 Easy Steps

Mike Stratis
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When it comes to unloading dry bulk bins, hoppers or vessels, we all know time is money. The more efficiently a job is done, the more time becomes available to take on new projects. More projects, equals… well, you get it.

One of the options available when it comes to material handling and unloading dry bulk barge hoppers or vessels is vibration. These externally mounted pneumatic or electric devices, when properly sized and installed, appropriately flex the bin or hopper wall to break free rat holing, bridging, caking or sticking material. With the assistance of the Cleveland Vibrator Selection Guide, the vibrator sizing process can be simplified and help increase successful installation. Read More…

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Jeff Hochadel

How to Properly Clean Fine Mesh Screens Without Damaging Your Equipment

Jeff Hochadel
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Over the years I have read many articles about how to reduce screen blinding on vibratory screeners. These solutions range from polyurethane balls to brushes. One of the most frequent questions I get asked is how to clean screens once they are blinded for fine mesh applications. Some customers simply throw out the blinded screens or send them back to our rescreening department for a fresh, new screen to be applied.

A screen does not necessarily have to be a very fine mesh in order to blind. We have seen screens with a mesh as coarse as a 2 or 3 mesh can easily blind due to product lodging in the openings while conveying across a screen deck. Of course, the larger the mesh opening the easier the screen is to clean. A fairly larger opening can simply be cleaned from the “bottom side” of the screen surface with a  simple soft wire or hard nylon brush. We have touched on this type of screen deblinding in previous blogs, you can click here to read more about solutions we suggest for these types of screening applications.

On finer wire mesh screens, let’s say 200 mesh and finer, a soft bristle brush may work but you risk tearing the screen surface or worse yet cutting a couple very fine wire mesh thus turning the 200 mesh opening into a much larger sized opening! If your screen frames are small (3”, 8”, 10”, 12”) Read More…

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