Details
Machinery Oil Analysis uniquely presents the entire practice of oil analysis as a condition monitoring tool for machines. This in-depth analysis describes the what, when, where and how-to for:
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Machinery lubrication concepts
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Machinery failure and maintenance concepts
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Machinery, fluid and filtration failure modes
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Oil sampling and testing
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Statistical analysis and data interpretation
Examples are given to highlight each step in the sampling, testing and diagnostic process. The work presents the latest advances in technology and instrumentation, including on-line sensors and their application.
Author: | Larry A. Toms |
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Published: | 2008 |
Format: | Hardback |
Pages: | 506 |
Excerpt: | Excerpt 1 Most industrial machines utilize filtration or are periodically serviced with filter carts. Changing internal filters almost always causes a significant loss of oil that must be made up. Dilution by new oil artificially lowers test results. This effect is proportional to the amount of oil added in relation to the capacity of the system. Small machines tend to lose a higher proportion of total volume during filter changes than large machines. In some cases, a developing problem such as abnormal wear can be completely masked by a filter change and top-up. In addition, the new filter may exhibit different characteristics, skewing test results even further. When sampling, top-up and/or filter change occurs at the same point in the maintenance schedule, take the sample first. Excerpt 2 Two of the most critical maintenance activities that impact oil data are oil makeup and change-out. All fluid and machine failure indicators are "concentration measurements". This means the "value" of parameter reported is a function of the volume in the reservoir at the time the sample is taken. Allow the volume to "fluctuate" by infrequent large makeup additions and the test data fluctuate inversely causing interpretation difficulties. Always maintain the reservoirs of operating machinery at the OEM recommended level. If the machine is a heavy oil consumer, add small volumes of makeup oil on a frequent basis. Never wait until the reservoir or sump falls to less than 90% full. |
Table Of Contents: | 1 Introduction to Oil Analysis 2 Equipment Failure and Maintenance 3 Machinery Lubrication 4 Machinery Systems and Components 5 Fluid Filtration and Purification 6 Machinery Failure Modes 7 Oil Sampling 8 Condition Monitoring Tests 9 Data Interpretation 10 Automation - Expert Systems 11 Establishing an Oil Analysis Program Glossary |
Reviews: | As with prior editions, the third edition is intended as a reference for equipment maintenance managers, supervisors and technicians. It provides a general description of oil-lubricated machinery, machinery fluids and filtration technologies, condition monitoring technology and the essential procedures for establishing a reliable equipment lubricant monitoring program. Management issues include developing effective condition indicators, calculating alarm limits, and estimating realistic program benefits. Since the publishing of the second edition in 1998, equipment maintenance and monitoring practices have evolved substantially. Maintenance managers increasingly use condition-data and other operational parameters to make decisions concerning "what maintenance to perform and when to perform it". Condition monitoring is a crucial element in Condition Based Maintenance (CBM) and Reliability Centered Maintenance (RCM) programs. Since the last edition, advancements in maintenance philosophy and new developments in the industry have generated a vast array of condition monitoring instrumentation and sensors, all of which improve the quality of machine and lubricant data. To describe all of these developments would be impractical. Instead, this book focuses on key oil condition monitoring methods, how to develop a general-purpose data interpretation procedure applicable for use with laboratory instrumentation, field instruments, and on-line sensors, and a means to overcome the increasing data analysis burden. The book also emphasizes the importance of performing failure modes, effects and criticality analysis and understanding the impact maintenance policies have on monitoring effectiveness and benefits. Typical solutions for common problems and the support needed to establish a successful program are discussed. |
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