文档介绍：ONLINE AND MANUAL (OFFLINE) VIBRATION MONITORING OF
EQUIPMENT FOR RELIABILITY CENTERED MAINTENANCE
By
Sheetalnath Mahalungkar, Reliability Engineer, Holcim (US) Inc
Mike Ingram, Integrated Condition Monitoring Entek (Rockwell Automation)
Abstract:
As the cement industry evolved, keeping equipment running without failure
became crucial. Loss in production due to equipment failure was no longer
affordable due to the increasing demand. In the cement industry, maintenance is
a costly and at the same time controllable expense. The initial concept of
equipment maintenance was reactive maintenance. Scheduled or preventive
maintenance replaced reactive maintenance, resulting in better equipment
availability. Even with scheduled preventive maintenance unprecedented failures
occur. Now the focus in the industry is shifting from scheduled maintenance to
the new technology of constantly observing machine condition and predicting the
condition in advance. This is predictive maintenance. The source of equipment
abnormality is identified and corrected which prevents the failure in the future.
This is reliability based maintenance. More concentration is focused on providing
advance warning of signs of trouble to prevent sudden failure. Predictive
maintenance is the current trend in the manufacturing Industry. Condition
monitoring through vibration monitoring and oil analysis is the latest technique of
maintenance to achieve higher equipment availability.
Holcim has evolved in last decade from preventive maintenance to reliability
centered maintenance through condition monitoring. Condition based
maintenance is the centre of maintenance activity in Holcim Portland Plant at
Florence, Colorado. The plant has been in operation since May 2002. As part of
the condition monitoring program, the plant has installed online vibration
monitoring systems on all critical equipment. The online transducers are
conne