Centrifugal pumps are common in industry. They are used to move various liquids from one place to another. This work is performed using a rotating pump wheel, or “impeller”, with a number of “vanes” on it. The wheel acts against the pump housing internals, which are either a volute or diffuser style, and produce the…
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Resonance, critical speed, and natural frequency are all very similar terms and refer to the same phenomenon. An increase in equipment vibration, not relating directly to a specific component, is oftentimes caused by one of the many component natural frequencies that are present on every system or object that exists in the known universe. It…
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Does your maintenance program need some… well, maintenance? A “good” maintenance program involves keeping equipment in peak condition and mitigating failure. Getting to this result takes the proper balance of strategies, people, and resources. Between changes in management, the revolving door of employees, and unreliable contractors, it can be relatively easy for an organization’s program…
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It is important in vibration analysis to know whether the vibration data you are looking at is actually “good data”. Below is a review of the causes and symptoms of junk data, as well as some tips to improve data quality overall in the future. Reasons for Bad Data A poor electrical connection is…
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Aligning motors to pumps, fans, compressors, etc., it’s what we do. But occasionally we get to assist a customer perform some real “millwright” work! Case in point – a 1000HP Caterpillar engine, driving a backup floodwater pump for a large municipality in the southeast US. This pump is critical to prevent flood water from mixing…
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As a Reliability Practitioner: If you have attended training performed to a standard that is certified by ISO (International Organization for Standardization), this guarantees that you will receive instruction and material that is documented to meet an international standard of knowledge from a certified trainer. When you pass the test to receive your registered ISO…
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A customer recently called saying his Belt Hog Sheave Alignment Tool was out of calibration. He stated that when he placed the Belt Hog lasers in the sheave grooves, they showed a slight amount of misalignment. However, when he rotated the lasers 180 degrees to check, there was a variance of 3mm (0.118”). While this…
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A few years back, there was a game show that used the idea of “Phone a Friend” when a contestant got in a jam. At Acoem USA, we have been a “friend” for maintenance and reliability personnel for a long time! I recently took a call from a maintenance mechanic who was installing a new…
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Fans are a very common component in industry, they are used to move air from one place to another. Fans are used in dust collection, supplying air to boilers, provide ventilation to factories, are used in the manufacturing process and more. Even your HVAC system at home has a fan/blower in it to move the…
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Fire pumps are probably THE MOST CRITICAL machines in industrial and commercial buildings. If they don’t work when they are supposed to, no other machine in the building matters. A fire pump needs to be reliable enough to run for a few hours. After that, either the fire is out, or the building is gone.…
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Recently, I provided training for a location that had vertical mounted electric motors driving pumps that were one or more floors below them. In this case, these pumps were driven with Cardan Shafts, however they did not have the typical 5-to-15-degree angles (between the motor & pump shafts and the drive shaft) recommended for lubrication…
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I’ve never been a maintenance supervisor, but I have worked for several. And when a machine has had problems, most maintenance supervisors have 5 questions: What’s wrong with it? How bad is it? How much longer can we run it? What do we have to do to fix it? What can we do to prevent…
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I don’t know about you, but in my nearly 45 years in industrial maintenance, there have been times when I felt stumped when trying to solve a problem. Sometimes you can just walk away and the solution comes to you while performing another task. Other times, a colleague or coworker may come along and have…
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There are numerous items to be considered when performing an initial inspection while setting up vibration analysis routes. All things from safety considerations to machine information, smells, and sounds need to be observed and documented. Safety The first and most important thing to consider when inspecting for a route is safety. Here are some…
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I heard this saying recently, and I like it a lot! Whether we are talking about woodworking, precision maintenance, shaft alignment, or any number of other crafts or technical operations-it is true. In my time as a trainer for Acoem USA, I have heard mechanics say (more times than I could count) “my (current alignment…
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If you’re working to maintain machines, Acoem USA wants to help.
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