Ultrasound diagnostics → Finding condenser leaksDec. 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.
Vibration diagnostics → Unusual bearing defectSept. 25, 2021, 8:44 a.m.
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.
Vibration diagnostics → Dynamic eccentricity of an induction motor rotorApril 17, 2021, 10:50 a.m.
Эксцентриситет ротора, Вибродиагностика, Электромагнитные дефекты
Vibration diagnostics → Collisions in the claw clutchFeb. 22, 2021, 2:28 a.m.
Удары в муфтах, Расцентровка, Вибродиагностика
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.
Diagnostics of electric valves → Why you shouldn't diagnose by currentFeb. 12, 2021, 8:35 a.m.
Арматура, Диагностика, Мощность, Диагностирование, Крутящий момент
Different → The 6 best cavitation videosDec. 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 …
Vibration diagnostics → Calculating a vertical pump motor reed frequency and subsequent system resonanceDec. 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.
Devices → Failure of the sensor of shock impulses SPM 44000Nov. 6, 2020, 11:07 a.m.
Vibration diagnostics → Rolling element damage and cage wear in bearings of identical pumps. Searching for a reasonOct. 9, 2020, 8:46 p.m.
Diagnostics of electric valves → Diagnostics of electric actuator valves by electrical parametersOct. 6, 2020, 8:51 a.m.
Мощность, АТЭ ТС-3000, Диагностирование, Арматура, Диагностика, Крутящий момент
First of all, in the nuclear power industry, but also in other industries, the direction of valve diagnostics is developing. The lion's share of all valves is occupied by valves with an electric drive and, depending on the type of power unit, their number can vary from 3000-4000 to almost 6000 units per power unit. Although not all fittings directly affect safety or power output, failure of just one mechanism is enough for fatal consequences, which, given the enormous laboriousness of repairing fittings located in an unsecured section, translates the diagnostics of valves from the category of "pampering" into a fairly serious science.
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