RIVAIR executes complete overhauling of centrifugal and screw compressors both at customer’s site and in our premises.
RIVAIR can provide planned service maintenance contracts with preventive interventions through the most innovative diagnostic check device. Our contracts include technical assistance, periodic checks of the plant and programmed maintenance in order to avoid unpredictable breakdown We are able to make detailed analysis on the status of our valued customer’s compressors with regular checks and test.Vibration analysis
We use the innovative “CSI 2140”, a device of last generation. The purpose of the Vibration Analysis is to verify the trend of the compressor and motor rotating parts, where possible, in order to get the performance in acceptable limits.
These limits are set by the manufacturer.
This job consists of:To retrieve and record vibration parameters of every single rotor in order to analyze the technical data downloaded during the different running conditions (start up, stop, full load and unload, always where possible).
We will elaborate the signal using the vibration transmitter exit in mm/volt, this value will be changed in FFT (Fourier), it will be possible to analyze the frequencies spectrums and determine the actual mechanical conditions
In this case the vibration amplitude is the physical displacement of the pinion inside its bearing; moreover we can calculate the damping of the hydrodynamic bearings, this happens when the rotor is running into its critical velocity, this value is very important for the evaluation.
The vibrations are expressed in micron or mils.
We are able to understand the mechanical behaviour of the ball bearings, of the roller units, electrical motor, screw compressors, etc.
In this case the checked amplitude is the velocity of the vibration into the time (mm/S).
Rivair engineer will deliver to the customer a complete report with operative suggestions and ployts (displacement & velocity)