Equipment repair is a must. A diagnostic specialist has to assess the technical condition of the equipment, and, accordingly, the quality of the repair. But it so happened that I expect the withdrawal of the unit from repair at my enterprise with some shudder.
Every day we are used to facing the same problems on the pumps. Sometimes one glance at the vibration spectrum is enough to identify the problem and issue recommendations for its elimination. But sometimes the diagnostician is given the opportunity to work hard. In this article, we will consider a practical case of vibration diagnostics of vertical pumps, conduct a whole study and identify an incomprehensible spectral component.
Bending of the pump shaft is rare. It can be determined by means of vibration diagnostics, and in some cases by simple inspection. In this article, we will consider a practical case of detecting this defect visually.
Recently we had a joyful event - our instrument park (QUARTZ, TOPAZ, AGAT-M) was replenished with the long-awaited Leonova Diamond from SPM Instrument. The instrument, coupled with the Condmaster Ruby software, enables complete analysis of time signals. A bearing defect on one of the pumps was not long in coming, and there was a reason to work with time signals.
My colleagues and I decided to conduct an experiment and determine the effect of imbalance on power consumption. A double-sided intake fan with a belt drive with vibration dampers was chosen as a test subject.
It happens that we encounter inexplicable problems that we cannot interpret using conventional means and methods of vibration diagnostics. And it does not occur to all of us that increased vibration and equipment failures can be associated with torsional vibrations. What are they, what are dangerous and how are they detected, read in this article.
Vibration diagnostics can not always accurately indicate the root cause of the poor technical condition of the equipment. There are various defects that can occur at the same frequencies. Therefore, before doing a more in-depth analysis, Victor Wowk, based on his experience, suggests using simple tools and methods to check the five conditions that will help identify the most common equipment problems. It is recommended that you keep this knowledge in your arsenal and apply it to novice mechanical engineers.
I received an application for vibration diagnostics of an electric motor of type 5AN355 V4 U3 (400 kW, 1480 rpm) after a major overhaul. This electric motor works in tandem with the mains pump at the boiler house in Reutov.
I want to devote this article to the practical application of modal analysis. I have never dealt with modal analysis, there were no devices with corresponding functions, and now they are not and are not expected. Very expensive. But this is not a reason to despair and put an end to such an interesting method. The solution to the problem is 3D modeling and calculation of vibration modes. How I came to this, how to do it and what I got in the end - read on.