Nov. 20, 2023, 2:31 p.m.

In the opening lines, I want to sincerely thank Evgenii Ochkasov for providing the material for this article.
Instead of a preface.
On one of the rare sunny days under the sky of Bologoye, I was sitting at my mom's house enjoying her magnificent pancakes with fragrant raspberry jam, washing them down with currant and mint tea. Mom, standing by the stove, looked at me, smiled, and said:
'You look so much like Kurchatov with that beard.'
Slightly choking on my tea from such a comparison, I coughed and replied with a smile:
'You know, just the day before yesterday, my boss offered me a choice between two research institutes, one of which is the Kurchatov Institute, and I decided to work there starting this Thursday.'
'Really? How interesting! And what will you be doing there, my son?'
'I'll be balancing a vacuum pump for a rocket engine.'
'Wow! Good luck!'

Ultrasound diagnostics

Dec. 28, 2021, 12:40 p.m.

Поиск протечек, Акустический течеискатель

There are many ways to find suction cups in capacitors. Starting with the use of candles, soap solution, film stretching, aerosol spraying, and ending with more advanced ultrasonic devices with nozzles. Each of these methods has many disadvantages, the main of which is the time of defect localization. Not so long ago, devices of a new class appeared on the market - acoustic visualizers. The technology of overlaying data from an array of microphones onto the image from the device's camera allows you to accurately localize the source of noise even from a considerable distance. In this short article, I want to share my experience with the Fluke ii900 acoustic camera.

Finding condenser leaks

Vibration diagnostics

Sept. 25, 2021, 8:44 a.m.

Дефекты подшипников

After identifying bearing defects and taking the equipment for repair, we always try to pick up the dismantled bearings from the repairmen, disassemble them and inspect them in detail. Exotic cases are sometimes encountered along with standard faults. One of the recent ones will be discussed further.

Unusual bearing defect 00

Vibration diagnostics

April 17, 2021, 10:50 a.m.

Эксцентриситет ротора, Вибродиагностика, Электромагнитные дефекты

Finally, let's touch on the topic of the dynamic eccentricity of the electric motor rotor. The defect is relatively rare and interesting. As usual, from my own practice, therefore, further there will be spectra, the search for the cause, and of course photographs.

Динамический эксцентриситет ротора электродвигателя

Vibration diagnostics

Feb. 22, 2021, 2:28 a.m.

Удары в муфтах, Расцентровка, Вибродиагностика

Двухшарнирная кулачковая муфта

Cam couplings with an elastic damping element are quite common in enterprises, lower requirements are imposed on their alignment than for elastic sleeve-finger couplings, but from personal experience this does not save from problems that arise with them. In this article, we will analyze a practical example of diagnosing a defect in a double-joint cam clutch.


Dec. 17, 2020, 9:49 p.m.


Cavitation is one of the most damaging things that can happen in your fluid power system. It’s a great way to shorten the life of your components, thanks to the relentless pitting it can exact on metal parts. While there are countless videos online that discuss cavitation, these six are our favorites …

The 6 best cavitation videos

Vibration diagnostics

Dec. 16, 2020, 6:18 p.m.

Резонанс, Модальный анализ, Собственная частота, Вибродиагностика

As part of a seismic analysis for a 1000 horsepower vertical 14 pole induction pump motor the reed frequency was calculated using a finite element analysis (FEA) program. This paper will discuss the FEA modeling for the seismic analysis and natural frequency determination. The calculations were done for the
motor only on a rigid support. After the motor completed the standard factory tests, an impact test was conducted in the rigid mount condition to determine the structural natural frequencies. The tested values will be compared to the calculated values from the FEA model. This paper will also discuss the subsequent motor/pump system resonance problems that surfaced after the motor/pump was installed on site. This paper will highlight the importance of the system integrators design of the motor support structure to avoid structural resonance problems such as in this case.


Nov. 6, 2020, 11:07 a.m.

Дефект датчика, SPM

This short article will be useful for owners of SPM Leonova Diamond and Leonova Emerald instruments. We are talking about a defect in the shock pulse sensor that we encountered. It was not possible to solve the problem quickly through support, so we find the reason and fix the defect ourselves.

SPM 44000

Vibration diagnostics

Oct. 9, 2020, 8:46 p.m.

Дефекты подшипников, Вибродиагностика

Recently we faced an interesting problem - identical bearing defects were found on four identical centrifugal pumps for four months.

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