Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/136253
Machinery Lubrication PUBLISHER Mike Ramsey - mramsey@noria.com GROUP PUBLISHER Brett O'Kelley - bretto@noria.com EDITOR-IN-CHIEF Jason Sowards - jsowards@noria.com SENIOR EDITOR Jim Fitch - jfitch@noria.com TECHNICAL WRITERS Jeremy Wright - jwright@noria.com Wes Cash - wcash@noria.com Bennett Fitch - bfitch@noria.com Loren Green - lgreen@noria.com CREATIVE DIRECTOR Ryan Kiker - rkiker@noria.com GRAPHIC ARTISTS Julia Backus - jbackus@noria.com Steve Kolker - skolker@noria.com Terry Kellam - tkellam@noria.com ADVERTISING SALES Tim Davidson - tdavidson@noria.com 800-597-5460, ext. 224 MEDIA PRODUCTION MANAGER Rhonda Johnson - rjohnson@noria.com Figure 2. Combining lab data with surveillance data for a complete picture of machine condition just predictive maintenance (PdM), but more specifically, early predictive maintenance (EPM). Let's start by reviewing the widely used P-F interval. A modified version is shown in Figure 1. The "P" is the point when an abnormal wear condition or fault is first detected. The "F" is the functional or operational end of the failure cycle requiring repair or replacement. Failures with short development periods usually go undetected when tests (e.g., vibration and oil analysis) are performed infrequently (even monthly analysis is viewed as infrequent). Conversely, frequent detection methods not only can report a developing failure but also have the potential to detect that failure early (in the incipient stage). There are specific tactics and tools for doing this well. Again, the secret to this strategy is the frequency. It enables a much higher percentage of failure detection (saves) events, especially earlier detection. The purposeful benefit is mitigated machine damage and reduced or no unscheduled downtime (longer P-F interval). While PdM concentrates on predicting the end of a machine's (or lubricant's) service life, EPM puts critical focus on timing — not just detecting — by detecting early. It seeks a budding problem, not a burgeoning problem. Detection by Multi-Modal Surveillance In Noria's seminars, we use the expression, "You can't catch a fish unless your hook is in the water." Likewise, in oil analysis, you can't catch a fault unless your hook is in the water. There's an earlier tier to oil analysis called the "detection phase," which in my view is a huge untapped opportunity in condition-based maintenance. Most scheduled oil analysis programs skip over the detection phase by attempting to catch impending machine failures and only take infrequent snapshots of oil condition. The detection phase of EPM is continuous failure surveillance across numerous parameters. It integrates skillful and frequent human inspection tactics with other conventional monitoring technologies. A few years ago, I wrote a column on the power of the oneminute daily inspection. This is a critical and often underutilized modality of surveillance and detection. Fundamentally, the detection phase of EPM is anything and everything that can be done to detect (not analyze) failure in progress. It includes all of the following: • Daily routine visual inspections of the oil (level, color, opacity, foam, varnish, tank condition, leakage, magnetic plugs, etc.) CORRESPONDENCE You may address articles, case studies, special requests and other correspondence to: Editor-in-chief MACHINERY LUBRICATION Noria Corporation 1328 E. 43rd Court • Tulsa, Oklahoma 74105 Phone: 918-749-1400 Fax: 918-746-0925 E-mail address: jsowards@noria.com MACHINERY LUBRICATION Volume 13 - Issue 3 May-June 2013 (USPS 021-695) is published bimonthly by Noria Corporation, 1328 E. 43rd Court, Tulsa, OK 74105-4124. Periodicals postage paid at Tulsa, OK and additional mailing offices. POSTMASTER: Send address changes and form 3579 to MACHINERY LUBRICATION, P.O. BOX 47702, Plymouth, MN 55447-0401. Canada Post International Publications Mail Product (Canadian Distribution) Publications Mail Agreement #40612608. Send returns (Canada) to BleuChip International, P.O. Box 25542, London, Ontario, N6C 6B2. SUBSCRIBER SERVICES: The publisher reserves the right to accept or reject any subscription. Send subscription orders, change of address and all subscription-related correspondence to: Noria Corporation, P.O. Box 47702, Plymouth, MN 55447. 800-869-6882 or Fax: 866-658-6156. Copyright © 2013 Noria Corporation. Noria, Machinery Lubrication and associated logos are trademarks of Noria Corporation. All rights reserved. Reproduction in whole or in part in any form or medium without express written permission of Noria Corporation is prohibited. Machinery Lubrication is an independently produced publication of Noria Corporation. Noria Corporation reserves the right, with respect to submissions, to revise, republish and authorize its readers to use the tips and articles submitted for personal and commercial use. The opinions of those interviewed and those who write articles for this magazine are not necessarily shared by Noria Corporation. CONTENT NOTICE: The recommendations and information provided in Machinery Lubrication and its related information properties do not purport to address all of the safety concerns that may exist. It is the responsibility of the user to follow appropriate safety and health practices. Further, Noria does not make any representations, warranties, express or implied, regarding the accuracy, completeness or suitability, of the information or recommendations provided herewith. Noria shall not be liable for any injuries, loss of profits, business, goodwill, data, interruption of business, nor for incidental or consequential merchantability or fitness of purpose, or damages related to the use of information or recommendations provided. May - June 2013 |3