In vibration analysis, three key parameters—amplitude, frequency, and phase—are used to identify machinery issues and determine their severity. Each plays a unique role: amplitude reveals the severity of the problem, frequency identifies the nature of the problem, and phase provides insight into how vibration signals move in relation to one another. What is Phase…
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Basic machine setups are typically made to collect all the data we need for each asset. This is not always possible or reasonable as we would spend far more time collecting a massive amount of rarely used data. So, we compromise by creating additional readings on the fly to get the best of both worlds.…
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When companies seek a laser alignment tool, they often struggle to determine which option is best for their specific requirements. Some may opt for a “cheap” solution and choose the least expensive model, while others aim for “the best” without fully understanding what “the best” entails for their situation. “The best laser alignment tool” is…
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When two vibrations with similar frequencies occur together, a phenomenon called “beating” takes place. This is like hearing two musical notes that are slightly out of tune – the combined sound gets louder and softer in a rhythmic pattern. In industrial settings, beating caused by nearby machines can lead to severe vibrations, even machine failure.…
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Acoem USA has recently begun selling the SoundCam Ultra 3, an easy-to-use acoustic imager and video leak detector that can detect, measure, and display air and gas leaks, vacuum leaks, as well as partial electrical discharges, and includes infrared capabilities. There are other tools available to detect air leaks, so what’s the big deal? A…
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A few years back, we posted a blog about one of the most common vibration signatures measured on pumps: turbulence. Causes of Turbulence in Pump Systems Several different things can cause turbulence in a pump system: Cavitation: when “cavities” of low-pressure vapor bubbles form in the suction side of the pump. Aeration or Air Entrapment:…
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The world of Condition Monitoring (CM) has undergone a remarkable transformation since the early 2000s. This blog post chronicles the experience of a mechanical engineer who entered the industrial reliability field fresh out of university, a time when CM wasn’t even part of the curriculum. It felt like graduating doctors weren’t trained on medical devices…
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Setting up vibration alarms in a vibration analysis program can be challenging. Questions such as whether to use overall alarms for acceleration, velocity, or displacement, and whether to measure RMS, peak, or peak-to-peak values can complicate the process. However, the ISO standard 20816-3 provides a straightforward solution. Utilizing ISO Standard 20816-3 This standard offers…
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There are times when you will observe sidebands in the Fast Fourier Transform (FFT) spectrum. These sidebands are a common occurrence and are often linked to specific mechanical and electrical issues such as gear mesh frequencies, inner race bearing faults, and various electrical anomalies. Understanding their significance requires a deeper examination. Sidebands provide critical insights…
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Pipe strain happens when the piping is not adequately supported, either by the use of pipe supports underneath (stiff legs), hangers, or both. It can cause problems when bolting up flanges and can contribute to premature seal failure. Pipe strain can also move the pump or base. For those performing precision shaft alignment, this can…
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Collecting vibration data is a crucial step in a reliability program. However, it is just one step in the process. Consistently collecting accurate data under varying operating conditions is essential for effective analysis and maintenance. Operating conditions such as speed, load, and production processes must be meticulously documented and followed to maintain consistent data amplitudes…
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Vibration data was taken on a motor/pump during initial training on the Acoem Falcon. This pump was chosen based on history and a visual inspection. The visual inspection pointed towards a potential misalignment issue. Misalignment Diagnosis The Accurex software in the Falcon diagnosed misalignment. This was confirmed by the Acoem EVO laser alignment tool.…
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In reliability and maintenance, base-related vibration and alignment problems have been common issues encountered. Problems such as: Soft foot Bearing misalignment within machines – such as motors, pumps, compressors, etc. Seal and bearing failures – related to radial loading, due to tightening down the pump to a base that isn’t flat Hold down bolts becoming…
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Frequency is as simple as the name implies, it is the number of times an event occurs in a set amount of time. In vibration analysis, we reference frequency to either cycles per second (Hz) or cycles per minute (CPM). Calculating Frequency & Cycles Per Minute (CPM) The frequency can be expressed mathematically as…
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All successful reliability programs have one thing in common – strong communication between all plant resources. Although this concept does not have any direct relevance to maintenance, it is an important topic to reflect on. Keeping a constant line of communication with operations, maintenance teams, management, and everybody else at your facility will provide feedback…
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