Technical solutions provider Bearing Man Group’s (BMG’s) condition moni- toring manager Pieter van Zyl tells Engineering News that, since extending its range of shock-pulse method condition monitoring systems to include the VibChecker and BearingChecker portable instruments, many of the instruments have been bought for use as frontline approach tools in condition-based maintenance programmes.
“By combining condition- based maintenance prod- ucts and services with current maintenance strategies and upgrades, downtime is reduced and productivity levels have improved,” he says.
Van Zyl foresees a definite increase in BMG’s product sales, owing to ongoing industry demand for higher production and less downtime.
“Frontline tools will have to become part of an artisan’s toolbox to achieve these goals.”
Maintenance artisans and section foremen can use the instruments to identify different fault conditions at an early stage, leaving enough time to contact a specialist to perform an advanced analysis.
The BearingChecker unit measures shock pulses generated by the ball and roller bearings of electric motors, fans and pumps. It measures the bearing’s mechanical and lubrication condition and temperature.
Integrated into the unit is a stethoscope function that enables the user to listen to the bearing. Depending on the physical condition of the bearing, green, yellow and red signals are displayed.
Van Zyl says the devel- opment of damage can be monitored and mainten- ance and repairs can be scheduled for an appropriate time without causing major production losses, if regular shock-pulse measurement is done.
Meanwhile, the VibChecker detects developing machine problems and gives an early warning of this to prevent premature replacement of machine parts like pump rotors, fan impellors, gearbox gears and housing mountings, he says.
The unit measures the severity of vibration according to the ISO 2372 or ISO 10816 vibration severity ranges and limits for machinery. It is also able to provide a vibration reading using the fast Fourier transform computer algorithm for basic vibration analysis and effective troubleshooting.
The readings are immediately and automatically evaluated, as the unit compares the measured value to the selected International Organisation for Standardisation standard and, depending on that reading, the unit displays a green, yellow or red light.
Further, the VibChecker features an internal probe and connector for external integrated circuit piezoelectric transducers and is capable of measuring the quadratic mean of displacement, the velocity, the acceleration and the ISO 2372 or ISO 10816-rated vibration severity between the 10 Hz and 1 000 Hz frequency range.
BMG’s goal is to have a VibChecker and BearingChecker in each artisan’s toolbox to assist customers in increasing their overall equipment effectiveness, states Van Zyl.