When a bearings rotates it give off a rolling signature which can be analysed to determine the overall condition. The signature is broken out into 4 discrete elements, the inner and outer race frequencies, the ball spin or roller frequency and finally the cage frequency. Therefore, for a given speed the bearing can be analysed and the condition verified against a database of known frequencies supplied by the bearing manufacturer.
Shock pulse measurement better known as SPM is our method of choice to analyse bearing condition.
Follow the link to read more about SPM as a method of machine condition monitoring.
Linear and rotary vibrations are the two main types of oscillation. In some cases vibration is desirable and necessary and used in conveying, speakers and mobile phones etc. In most other cases vibration is undesirable and requires corrective action to reduce noise and energy consumption.
Rotary vibration is caused when the axis of rotation and the axis of the spinning mass are not aligned.
Vibration Analysis or VA, seeks to determine the error between these two axis and apply a corrective means of alignment to reduce or remove the level of vibration to within an acceptable tolerance. In most cases applying or removing a weight at a calculated distance and angle corrects most errors.
To understand vibration in more detail read this
We have been carrying out dynamic two plane and single plane balancing for over 25 years with various machines having a capacity up to 4.5tonnes.
So from a simple single plane narrow impeller to a complex spiral paddle beater we have the means and expertise to remove any imbalance. This extends to site work where our skilled engineers are able to undertake VA and corrective action on site.
Metric Motor Frame Sizing