everything that rotates
                        needs to be balanced

 

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Vibration Information for rotating machinery applications.

 

Spectrum Analysis

Friday, April 29, 2011

We can feel vibrations of all types of rotating equipment. However we do not know what causes the vibrations in the systems. Vibration data taken from transducers (displacement, velocity, and acceleration) display vibration magnitude versus time, which is known as time domain. Time domain contains complex waveforms because vibrations from different sources are captured by transducers. Vibrations can be caused one of the followings or combinations of the followings: unbalanced mass, hydrodynamics forces, coupling misalignment, loose footing, bearing damage, gear mismatch/damage, and many more. Complex waveforms are usually observed in washing machines, fans, angle grinders, optical disk drive, boat propellers, driveshafts, compressors, internal combustion engines, centrifuges, pumps, etc. Read More

Vibration in Compressors

Wednesday, April 27, 2011

Compressors are a widely used product that come in various sizes and shapes. They are implemented in several commonly used applications such as: Read More

Vibration in Boat Propellers

Monday, April 25, 2011

boat propeller vibrationBoat propellers are mostly cast and made from various alloys. Porosity and shrinkage are usually formed during casting processes, and foreign materials or inclusions are often observed in cast propellers. These manufacturing defects generate mass imbalance in the propellers. Static balancing is required to balance the propellers by removing or grinding some materials. The balancing process is time consuming, tedious, and costly. Read More

One Plane Versus Two Plane Balancing

Monday, April 18, 2011

Machines are typically balanced in one plane or two planes by adding or removing material. The previous article titled "Balancing in Manufacturing", mentioned different types of imbalance in rotating machinery, and the importance of why machines have to be balanced. The question is: How do we know if a machine needs to be balanced in one plane or two planes? Read More

Vibration Monitoring for Maintenance

Sunday, April 17, 2011

With the advent of better vibration measurement tools at reduced costs, may companies have implemented vibration monitoring programs to protect their machinery and ensure production does not suffer. In the past, it was common to run a machine until failure occurred; the biggest setback with this method is that secondary damage to other machines could result if a problem was not fixed in time, and production would unexpectedly come to a halt. Read More