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.
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.
Vibration diagnostics → Rolling element damage and cage wear in bearings of identical pumps. Searching for a reasonOct. 9, 2020, 8:46 p.m.
Vibration diagnostics → Bearing electric burnSept. 20, 2020, 8:35 a.m.
Vibration diagnostics → Loose seating of centrifugal fan bearingsSept. 12, 2020, 10:20 p.m.
Дефекты подшипников, Виброналадка, Дисбаланс, Вибрация, Вибродиагностика
Vibration diagnostics → Stall flow in the pumpSept. 6, 2020, 8:03 p.m.
Гидродинамика, Вибродиагностика, Резонанс
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.
Vibration adjustment → Bending of the pump shaft CNSv 12.5-60Sept. 5, 2020, 9:16 p.m.
Vibration diagnostics → The Five ConditionsMay 3, 2020, 12:42 a.m.
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.
Vibration diagnostics → Case of life. Unbridled axial vibration of the electric motor idling (after warming up)April 29, 2020, 7:36 p.m.
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