Predictive maintenance of pumps using condition monitoring by raymond s. Fundamentals of asset management 3 drawing from the am knowledge base this workshop is produced by ghd inc. These principal maintenance strategies, rather than being applied independently, are integrated to take advantage of their re. This publication collects and analyses proven condition based maintenance strategies and. The mission of femp is to facilitate the federal governments implementation of sound, cost. A general ruleofthumb is to set the intervals for inspection somewhere midway of the pf interval. Condition based maintenance cbm is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it is needed and at the most opportune times. How and why is this ability to detect and visualize an objects temperature proile.
Therefore, correct management of corrective, predictive, and preventive politics in any industry is required. Reliability centered maintenance project managers guide executive summary hundreds of public and private sector organizations around the world have demonstrated that reliability centered maintenance rcm is consistently capable of significantly increasing asset performance by delivering value to owners, customers and stakeholders. Today, improvements in technology are making it easier to gather, store and analyze data for cbm. An overview of timebased and conditionbased maintenance. One issue is to implement the conditionbased maintenance cbm approach that makes a diagnosis of the asset status based on wire or wireless monitored. Condition based maintenance and condition monitoring. An introduction to total productive maintenance tpm. Recently, in order to reduce high maintenance costs and to increase operating ratio in manufacturing systems, conditionbased maintenance cbm has been developed.
Maintenance planning and scheduling exists because it gives value to those businesses that use physical assets, such as plant, equipment, machinery, facilities and infrastructure, in providing their product to paying customers. Maintenance management considers the main concepts, state of the art, advances, and case studies in this topic. The value planning and scheduling contributes is by minimising the waste of time and resources so production can be. Inspection, testing and commissioning of electrical. Point f is the point at which the defect has created a functional failure. The complete conditionbased maintenance cbm guide fiix. Six steps to conditionbased maintenance an exciting trend in the world of cmms is the increasing sophistication of conditionbased maintenance cbm features and functions vendors offer and maintenance professionals actually use. Whats more it presents a maturing of measurement technique for maintenance and asset maintenance and. For example, most people change the oil in their vehicles every 3,000 to. The book focuses on the main condition monitoring techniques particularly relevant. This book complements other subdisciplines such as economics, finance, marketing, decision and risk.
Point p is the point at which the defect enters the system and is detectable. Many times it is economically more sensible simply to use time based maintenance and not care about condition because it is the more cost effective option in the circumstances. Conditionmonitoring maintenance task intervals must be properly understood and task intervals should be determined based on the expected pf interval. Conditionbased maintenance cbm is a maintenance program that recommends maintenance decisions based on the information collected through condition monitoring. You will recall that preventive maintenance is timebased.
Condition based maintenance in the condition based maintenance cbm technique one take the condition monitoring results in account and plan the maintenance action by it. This relatively new approach to maintenance uses data drawn during operations andor maintenance intervals to forecast the need for additional or future maintenance. Reliability centered maintenance project managers guide. Diagnostics and prognostics are two important aspects of a cbm program. Implementation strategies and tools for condition based. This guideline is prepared in view of the requirements for switchyard service inspection visual and condition based maintenance of substation equipment, structures and other miscellaneous items in substations. This will allow maintenance to be scheduled based onequipment condition and not time.
Reliabilitycentered maintenance methodology reliabilitycentered maintenance rcm is the optimum mix of reactive, time or intervalbased, conditionbased, and proactive maintenance practices. For this reason, achieving costeffective plant maintenance is highly importan. An introduction to condition based maintenance cbman approach to cbm application and management by. Or at least, the monitoring time must be shorter than the span of the pf interval. Conditionbased maintenance cbm, also known as predictive maintenance, is a maintenance practice that derives maintenance requirements, in large part, from realtime assessment of platform or weapon system condition obtained from embedded sensors andor external tests and measurements using builtin diagnostic equipment. Condition based maintenance oder zustandsorientierte instandhaltung im. It manages trend values, by measuring and analyzing data about deterioration and employs a surveillance system, designed to monitor conditions through an online system. The paper discusses how the tbm and cbm techniques work toward maintenance decision making. A guide for using conditionbased maintenance cbm more effectively.
Department of energys federal energy management program femp. Condition based maintenance plus dod guidebook dau. The main function of condition monitoring is to provide this knowledge. Maintenance books lubrigard industrial lubrication. Substation service inspection and condition monitoring guide photo credit. Jd edwards enterpriseone condition based maintenance. Indicators for managing maintenance utilizes techniques based on other management measurement systems, such as the balanced scorecard. Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life, are sometimes known as timechange. For example, if an image indicated a difference between a pulley belt temperature. In this new section, the authors deal with the multiobjective condition based maintenance optimization problem.
He has authored or coauthored 20 book chapters, 165 journal papers and 150 conference papers. There are two main methods used for condition monitoring, and these are trend monitoring and condition checking. His current research interests include various aspects of reliability, maintenance, warranties and service contracts. Condition based maintenance cbm offers the promise of enhancing the effectiveness of maintenance programs in a way that no other single concept has ever matched. Preventive and predictive maintenance 700zb00102 42 preventivepredictive maintenance the guiding principle of ppm is the regular and systematic application of engineering knowledge and maintenance attention to equipment and facilities to ensure their proper functionality and to. Infrastructure and configuration required to turn diagnostics into information. This paper presents an overview of two maintenance techniques widely discussed in the literature. The pf curve figure 2 is an artists version of the fault progression of a defect. The cbm philosophyit is about utilising the condition monitoring technologies topredict the failure patterns of an asset.
Condition based maintenance and condition monitoring pf curve thinking figure 2. In condition based maintenance, critical item characteristics are monitored through, for example, vibration or temperature monitoring in order to gain early indications of an incipient failure. Then, based upon this factual information foundation, reliability engineering begins the development and subsequent refinement of a preventivepredictive maintenance program. Reactive maintenance run to failurebased when it breaks, fix it preventive maintenance timebased prevent failures with regular maintenance predictive maintenance conditionbased monitor for out of tolerance today, maintenance is expected to contribute to the strategic goals. Cbm can drastically reduce operating costs and increase the safety of assets requiring maintenance. Book title popular one for rotating and reciprocal machinery is the vibration analysis. Pdf productivity is a key weapon for manufacturing companies to stay competitive in a continuous growing global market. Time based maintenance, failure finding maintenance, risk based maintenance, condition based maintenance and predictive maintenance. Preventive maintenance principles mit opencourseware.
This book shows how condition monitoring can be applied to detect internal degradation in pumps so that appropriate maintenance can be decided upon based on actual condition rather than an arbitrary time scales. Choose the maintenance strategy which gives maximum reward. Replacement of coolant or oil, if there is a change in colour. Condition based maintenance is the process of monitoring the condition of an asset and taking an action to avoid the consequences of a failure. Conditionbased maintenance cbm is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it is needed and at the most opportune times. An evaluation guide for building services seaman, a. Pdf on condition based maintenance policy researchgate. Perhaps we re finally turning a corner on the ageold firefighting mentality, replacing it with a more planned. By contrast, conditionbased maintenance is not directly based on equipment age.
In particular, cbm is highly effective where safety and reliability is the paramount concern such. Preventive maintenance is done before a failure occurs and consists of maintenance types like. This book is concerned with the process of early detection but greater benefits could be achieved from condition monitoring if the information from monitoring is used to schedule maintenance, allowing planned shutdowns so that the life of plant, of which the electrical machine forms a part, can be extended. There are 9 types of maintenance split between preventive maintenance and corrective maintenance. The purpose of cbm is to eliminate the breakdowns see figure 1 and prolong the preventive maintenance intervals see figure 2. By evolving from time based, to condition based, to predictive and prescriptive maintenance, companies are evolving their maintenance systems from being simply efficient to becoming truly strategic. Conditionbased maintenance allows preventive and corrective actions to be scheduled at the optimal time, thus reducing the total cost of ownership. The books homepage helps you explore earths biggest bookstore without ever leaving the comfort of your couch. If what i consider to be conditionbased maintenance you call predictive. Logically, an effective maintenance program, supported by these four essential elements, begins with equipment history. This is the process of conditionbased maintenance, first described in chapter 1. Six steps to conditionbased maintenance plant services. To answer this question we have identified a series of metrics to assess the efficiency and usefulness of cbm. Again, using multiple monitoring points within the pf interval is even better and more advisable.
Reissues dod department of defense instruction dodi 4151. Pdf technical design of condition based maintenance system. Research, though, has shown that condition based maintenance has not been implemented on a wide basis. Beyond maintenance, cognitive systems can integrate maintenance and operations data with other data sources, such as quality, warranty and. Condition based maintenance strategy for equipment failure.
Planned maintenance is preplanned, and can be datebased, based on equipment running hours, or on distance travelled. Here youll find current best sellers in books, new releases in books, deals in books, kindle ebooks, audible audiobooks, and so much more. Condition based maintenance cbm is a maintenance strategy which, simply put, measures operational parameters in assets to determine a change in their condition, performing maintenance only when the need arises. During the analysis portion of this study we examined two assault helicopter. What cbm is, how its used and how to optimize it for maximum return. Predictive maintenance of pumps using condition monitoring. More competitive together reduce maintenance costs by standardized solutions and services within condition monitoring. When surveying published research within condition based maintenance and condition monitoring, most papers and books deal with the technical aspects, and. If youve found this article helpful and would like to get your own pdf copy of the article. Maintenance is a critical variable in industry to achieve competitiveness. Establishing a condition based maintenance program. This separation has applied to maintenance requirements planning, the processes for determining maintenance requirements, and the documentation of these requirements and of work done. Using condition maintenance can cause you to become a reactive organisation if you decide to rectify problems only after detecting impending failure. Introduction to maintenance engineering wiley online books.
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