Latest video coverage from EASA 2011
Owing partly to tradition, the shafts of electric motors are often larger than those of the equipment they drive.
Couplings are often forgotten until a project is nearing its end.
Back in the early seventies, when I was in grad school, our government pledged to convert the U.S. measurement system to the metric system. A popular cartoon at the time showed a lab technician with a box of amputated human feet standing at the door of the supply room. The supply clerk was also holding a box, but his was full of volt meters. The caption was "Trading Feet for Meters." That was almost 37 years ago, and we still have most of those feet! I guess that I could say that we are still "inching" into the metric system.
Advanced motor protective relays provide superior protection for motors and pumps. pump system optimization
A flexible coupling's primary functions are connecting two shafts, transmitting power from a driver shaft to a driven shaft and accommodating the misalignment between them.
The SI system is the modern day version of the metric system, and the U.S. gets a lot of grief for not embracing its inherent transportability across international boundaries.
It is impossible to balance line-to-line voltages perfectly in a three-phase circuit.
Last September, we spoke about the importance of pipe-to-piping alignment, evaluating actual numbers, and tabulating stress values as they approach yield stress of pipe at various values of misalignment. This time, we will discuss the effects of pump-to-motor misalignment, beyond hype or generalities, by numerically quantifying the conclusions.
The industrial motor world has a new specification available for defining the requirements of general purpose, severe duty motors in the 250- to 3,000-hp range.
Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability.
For the first time, the United States Department of Energy (DOE) adopted energy conservation standards for small electric motors in February 2010.
Mechanical resonance occurs when an external source amplifies the vibration level of a mass or structure at its natural frequency.
Introduced in June 2010, Super-E Motors with AEGIS Shaft Grounding Ring are used in commercial and industrial applications.