Bearing condition monitoring - Part 5
October 2006
Maintenance, Test & Measurement, Calibration
Now that we are familiar with the shock pulse methodology, let us look at some examples of this powerful tool.
The shock pulse method is the only method that works effectively at all rotation speeds, from about 0,5 rpm to as high as you like. There is, however, a point where the normal rules do not apply and where trending and comparison is used. Let us look at one example. This is on a tilt furnace trunion bearing. The bearing diameter is about 1 m and the rotation speed 0,6 rpm. The unit cannot turn 360°, only about 270°. Measurements are taken using SPM's Leonova machine condition genius and a shock pulse probe. The furnace is tilted fully to one side. As soon as the rotation is started the measuring cycle is started. Consecutive measurements are taken by using the recording function where the instrument measures as fast as possible. It is possible to take 10 measurements before the furnace reaches its stop. When analysing the result, the maximum and minimum as well as the average is calculated from the 10 measurements for both the dBm and dBc values. These are presented in the graphs. The graphs clearly show the one bearing settling in after replacement and the other a bearing's deteriorating condition. Show me another method that is able to do this!
Next time we will look at more mundane cases, like fans and how one can have an effective monitoring and protection system without the normal problem of false alarms or undetected failures.
Further reading:
Automated test and measurement
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Comtest, in partnership with global brands, provides customised solutions with integrated hardware and software for efficient testing and data collection.
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Inline particle measurement
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Part of the SOPAT family, Parsum has for more than 20 years stood for the measurement of particles in a running process - without sampling and without a laboratory.
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Inline analysis measurement technology
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SOPAT develops and sells a photo-optical and image-based inline analysis measurement technology that quantitatively characterises particulate multi-phase systems. The software provides real-time analysis of particle size distribution.
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UV water treatment system
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bestUV is an innovative manufacturer of professional ultraviolet (UV) water treatment systems for industrial markets.
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RS PRO a key partner for planned maintenance
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RS PRO, the own-brand of RS, offers a comprehensive selection of over 80 000 products spanning all industries and technologies.
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WearCheck leads the way in condition monitoring
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Minimising maintenance costs of mining and power-generating machinery and maximising its operational efficiency – these goals form the foundation of the proactive/preventive maintenance services provided by the expert technicians at condition monitoring specialist, WearCheck.
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Collect data three times faster
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Maintenance, Test & Measurement, Calibration
SKF has extended its renowned Microlog Analyzer family of data collection devices with the addition of the Microlog Analyzer dBX. Currently SKF’s most powerful diagnostic tool, this cutting-edge device redefines diagnostic capabilities, enabling users to take measurements three times faster than its predecessor.
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Integrated liners for the mining industry
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Multotec has developed a range of composite integrated mill liners in response to the needs of local and international mining clients.
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The criticality of maintenance in the water and wastewater segment
Schneider Electric South Africa
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In a time of water shedding, climate change and ageing infrastructure, the importance of maintenance and support in the water and wastewater segment cannot be overstated.
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How dry ice blasting is revolutionising the mining industry
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Dry ice blasting has emerged as a game-changing technology for the mining industry, offering a range of advantages that are reshaping traditional cleaning methods.
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