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.

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.

The frequency of encounter with such a defect as misalignment depends on the culture of equipment installation and repair at your enterprise. On mine there are some problems with this, which makes my professional career more diverse. I propose to consider the classic practical case of misalignment and evaluate its effect on vibration parameters.

The fight against vibration of fans is a special niche in the practice of vibration diagnostics. In many enterprises, fans turn a blind eye - they say cheap, low-liability, etc. But in my opinion, fans are the main source of experience for a beginner vibration diagnostics / vibration adjuster. Fans, as a rule, are mounted / operated in violation of the requirements, have low rigidity, and accordingly a huge mass of defects is manifested on them. In this article, we consider the effect of improper installation on the vibration of the unit, we localize the defect and eliminate it.

In this article I want to talk about the difficulties encountered during vibration adjustment, the interweaving of many different defects at the rotational speed, the search for solutions to the problem, and the possibilities of the vibration adjustment specialist are not unlimited. A story without a happy ending, as always from our own real practice.