Frequency can be defined as how often an event occurs per unit of time. A vibration spectrum is displayed as a horizontal and vertical plot (X and Y). The horizontal (X) axis is the frequency axis and shows a representation of how often an event occurs. Typically, the vibration analyst may use multiple units of [...]
MYTH: “It is acceptable to use a stinger attached to the vibration sensor.” TRUTH: Stingers can be attached and used with most vibration sensors. However, stingers are the least desirable method to mount the sensor to the equipment. Stingers reduce the frequency range that can be measured with the attached sensor. Also, it is very difficult to [...]
If, based upon your vibration data, you suspect that a motor has an electrical defect, then you can perform a quick verification check using your vibration data collector. Place your vibration data collector in a live mode or continuous measurement mode. Turn off the electric power to the motor. Any electrically induced vibration should cease [...]
We often hear about the need to acquire vibration measurements at precisely the same location each time we measure a point. Why is this important? In order for vibration measurements to be trendable they must be closely repeatable, and we need to eliminate measurement error. With high frequency measurements, the vibration attenuates rapidly as it [...]
Thank you for attending our Webinar on Effective Defect Analysis: Maximizing your Vibration Setup by Mitch Stansloski, PhD, PE – Pioneer Engineering If you missed our Webinar, you can view it on demand at any time. We hope that you found your time with us to be informative and interesting. Here are the answers to your [...]
The following situation occurred at a Municipal Power Plant. During a planned outage, the on-site team was utilizing a Rotalign Pro with Boralign to assess the position of the bearing bores after removal of the rotor on an Allis Chalmers power generation steam turbine. The results were varying far more than normal and the customer [...]
