Machine Reliability and Condition Monitoring: A Comprehensive Guide to Predictive Maintenance Planning
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About this ebook
Condition monitoring is the process of keeping an eye on a machine's condition parameter in order to spot any major changes that could be signs of a malfunction developing. It plays a significant role in preventive maintenance and is a major component of predictive maintenance. By combining machine sensor data that detects vibration and other characteristics (in real-time) with cutting-edge machine monitoring software, condition monitoring (CM), a maintenance strategy, anticipates machine health and safety.
Predictive Maintenance strategy employs vibration analysis, thermography analysis, ultrasound analysis, oil analysis and other techniques to improve machine reliability. The goal of the strategy is to provide the stated function of the facility, with the required reliability and availability at the lowest cost.
Mohammed Hamed Ahmed Soliman
Mohammed Hamed Ahmed Soliman is an industrial engineer, consultant, university lecturer, operational excellence leader, and author. He works as a lecturer at the American University in Cairo and as a consultant for several international industrial organizations. Soliman earned a Bachelor's of science in Engineering and a Master's degree in Quality Management. He earned post-graduate degrees in Industrial Engineering and Engineering Management. He holds numerous certificates in management, industry, quality, and cost engineering. For most of his career, Soliman worked as a regular employee for various industrial sectors. This included crystal-glass making, fertilizers, and chemicals. He did this while educating people about the culture of continuous improvement. Soliman has more than 15 years of experience and proven track record of achieving high levels of operational excellence to a broad range of business operations including manufacturing, service and healthcare. He has led several improvement projects within leading organizations and defined a lot of savings in the manufacturing wastes stream. Soliman has lectured at Princess Noura University and trained the maintenance team in Vale Oman Pelletizing Company. He has been lecturing at The American University in Cairo for 8 years and has designed and delivered 40 leadership and technical skills enhancement training modules. In the past 4 years, Soliman's lectures have been popular and attracted a large audience of over 200,000 people according to SlideShare's analysis.. His research is one of the most downloaded works on the Social Science Research Network, which is run by ELSEVIER. His research is one of the most downloaded works on the Social Science Research Network, which is run by ELSEVIER. Soliman is a senior member at the Institute of Industrial and Systems Engineers and a member with the Society for Engineering and Management Systems. He has published more than 60 publications including articles in peer reviewed academic journals and international magazines. His writings on lean manufacturing, leadership, productivity, and business appear in Industrial Engineers, Lean Thinking, Industrial Management, and Sage Publications. Soliman's blog is www.personal-lean.org.
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Reviews for Machine Reliability and Condition Monitoring
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- Rating: 5 out of 5 stars5/5This book present in details the Reliability System and all Predictive Maintenance tools required to improve reliability.
Book preview
Machine Reliability and Condition Monitoring - Mohammed Hamed Ahmed Soliman
Reliabiltiy Analysis
Maintenance Analysis
Maintenance Policies and Strategies
R
CM promotes the use of Predictive and Risk Maintenance policies for identified critical equipment
Predictive Maintenance Techniques
Reliability KPIs
Equipment Criticality Analysis
I
mportance of Equipment Criticality Analysis involves:
Influence the priority assignment of the Work Orders.
Influence the Work Orders execution speed.
Determine which Maintenance Class should come first.
Effect the scheduling of the preventive maintenance program.
Influence the priority of the preventive maintenance work.
Help in determining which maintenance approach to be used.
Criticality Measuring Principles
Safety
✓ Safety equipment (equipment carrying peoples, firefighting system, and alike).
✓ Consequence of parts failure effect safety (elevator ropes broken, firefighting generator stopped...etc).
✓ Gas piping leakage at any point poses a risk.
Production, Process
✓ Equipment breakdown affect the whole production line.
✓ Equipment breakdown affect partially the production line.
✓ Equipment failure has native effect on production quality.
The Consequence of Failure Can Lead to Process Shutdown, Major Losses, or Quality Problem.
CRITICALITY IS INFLUENCED by the availability of standby equipment in a system but how much time does it take for the standby equipment to operate? And what is the effect of this on the production?
Time (Time=Money)
1 min production=How much?
1 Hr production =How much?
If your equipment is classified as critical, ask yourself the following questions:
› What is the preventive maintenance program I have for it? Enough? Or not?
› How much time does it take to repair it in case of failure?
› Spare parts allocation? Available? Not available? If not available, how much does it take to allocated it from the vendor?
› Require special skills for repair? Is my team trained to repair it in a proper time?
› Do you have an emergency plan for it in case of accident or failure? Is your team aware of this plan and trained on it?
Money, Cost
Vibration Analysis
Introduction and Terminologies
V
ibration can be defined as simply the cyclic or oscillating motion of a machine or machine component from its position of rest.
Displacement:
It is the amplitude of a point on a structure.
Velocity:
Is the speed of a point in a system, it is the rate of change of displacement.
Acceleration:
Is the rate of change of velocity of a point in a system.
Frequency:
Is the no of cycles (vibrations) per second, measured by hertz (HZ)
Harmonics:
Frequency component at a frequency that is an integer (whole number e.g., 2X. 3X. 4X, etc.) multiple of the fundamental (reference) frequency.
How many RPMs in 1 hertz?
Since hertz is in sec, and RPM is in minute, 1 hz= 60 RPM.
How to convert RPM to Hertz?
1500RPM = 25hz
Why we measure the vibration?
✓ To detect what is out of the human sense.
✓ To discover hidden failures.
✓ To Detect early failures & monitor the machine
health condition.
✓ To assure the quality of repairs.
✓ As a useful tool to improve the maintenance
Reliability.
Common Industrial Applications:
Pumps
Fans
Turbines
Agitators
Stirrers
Compressors
Electric Motors
Gearboxes
Vibration& Reliability
Vibration analysis alone doesn’t improve reliability, root cause analysis and acceptance testing can help.
There are two ways that we can utilize vibration to improve reliability:
First, if we study the vibration, we can often determine why the fault condition developed in the first place; for example, what caused the crack to appear in the inner race of the bearing? If we perform root cause failure analysis, we can make chances to our proactive so that the bearing doesn’t suffer the same fate in the