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ASTM D7917-14(2018)

(Practice)

Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain Applications

Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain Applications

SIGNIFICANCE AND USE
5.1 This practice is intended for the application of online, full-flow, or slip-stream sampling of wear debris via inductive sensors for gearbox and drivetrain applications.  
5.2 Periodic sampling and analysis of lubricants have long been used as a means to determine overall machinery health. The implementation of smaller oil filter pore sizes for machinery has reduced the effectiveness of sampled oil analysis for determining abnormal wear prior to severe damage. In addition, sampled oil analysis for equipment that is remote or otherwise difficult to monitor or access is not always sufficient or practical. For these machinery systems, in-line wear debris sensors can be very useful to provide real-time and near-real-time condition monitoring data.  
5.3 Online inductive debris sensors have demonstrated the capability to detect and quantify both ferromagnetic and non-ferromagnetic metallic wear debris (1, 2). These sensors record metallic wear debris according to size, count, and type (ferromagnetic or non-ferromagnetic). Sensors can be fitted to virtually any lubricating system. The sensors are particularly effective for the protection of rolling element bearings and gears in critical machine applications. Bearings are key elements in machines since their failure often leads to significant secondary damage that can adversely affect safety, operational availability, operational/maintenance costs, or combinations thereof.  
5.4 The key advantage of online metallic debris sensors is the ability to detect early bearing and gear damage and to quantify the severity of damage and rate of progression toward failure. Sensor capabilities are summarized as follows:  
5.4.1 Can detect both ferromagnetic and non-ferromagnetic metallic wear debris.  
5.4.2 Can detect 95 % or more of metallic wear debris above some minimum particle size threshold.  
5.4.3 Can count and size wear debris detected.  
5.4.4 Can provide total mass loss.
Note 1: Mass is an inferred value which ...
SCOPE
1.1 This practice covers the minimum requirements for an online inductive sensor system to monitor ferromagnetic and non-ferromagnetic metallic wear debris present in in-service lubricating fluids residing in gearboxes and drivetrains.  
1.2 Metallic wear debris considered in this practice can range in size from 40 μm to greater than 1000 μm of equivalent spherical diameter (ESD).  
1.3 This practice is suitable for use with the following lubricants: industrial gear oils, petroleum crankcase oils, polyalkylene glycol, polyol esters, and phosphate esters.  
1.4 This practice is for metallic wear debris detection, not oil cleanliness.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5.1 Exception—Subsection 7.7 uses “G’s”.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Sep-2018
ICS
17.220.20 - Measurement of electrical and magnetic quantities
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.96.07 - Integrated Testers, Instrumentation Techniques for In-Service Lubricants
Current Stage
Ref Project

Relations

Replaces
ASTM D7917-14 - Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain Applications
Effective Date
01-Oct-2018
Refers
ASTM G40-15 - Standard Terminology Relating to Wear and Erosion
Effective Date
01-Nov-2015

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ASTM D7917-14(2018) - Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain ApplicationsASTM D7917-14(2018) - Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain Applications
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ASTM D7917-14(2018) - Standard Practice for Inductive Wear Debris Sensors in Gearbox and Drivetrain Applications
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7917 − 14 (Reapproved 2018)
Standard Practice for
Inductive Wear Debris Sensors in Gearbox and Drivetrain
1
Applications
This standard is issued under the fixed designation D7917; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
2
Wear debris sensors, employing inductive sensing technologies (1, 2), are able to quantify wear
debris to classify size and material composition (ferrous/non-ferrous) of metallic debris found in
lubricating oil as a consequence of wear. Initial applications have been largely confined to industrial
aero-derivative and aircraft gas turbine engine monitoring installations where the failure of high speed
ball and roller bearings results in significant secondary damage (2, 3). With an almost exponential
growth in the wind turbine industry, one engineering issue still to be resolved is the unacceptable
gearbox failure rate (4). Wear debris sensors can play an important role in understanding the varied
bearing failure modes observed. There are thousands of inductive sensors operating in wind turbines
and other gearbox and drivetrain applications accruing millions of operational hours. While it is
generally accepted that these sensors provide early warning of abnormal condition, the industry will
benefit from a standard practice for data usage and interpretation.
1. Scope 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This practice covers the minimum requirements for an
responsibility of the user of this standard to establish appro-
online inductive sensor system to monitor ferromagnetic and
priate safety, health, and environmental practices and deter-
non-ferromagnetic metallic wear debris present in in-service
mine the applicability of regulatory limitations prior to use.
lubricating fluids residing in gearboxes and drivetrains.
1.7 This international standard was developed in accor-
1.2 Metallic wear debris considered in this practice can
dance with internationally recognized principles on standard-
rangeinsizefrom40 µmtogreaterthan1000 µmofequivalent
ization established in the Decision on Principles for the
spherical diameter (ESD).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.3 This practice is suitable for use with the following
Barriers to Trade (TBT) Committee.
lubricants: industrial gear oils, petroleum crankcase oils, poly-
alkylene glycol, polyol esters, and phosphate esters.
2. Referenced Documents
3
1.4 This practice is for metallic wear debris detection, not
2.1 ASTM Standards:
oil cleanliness.
D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
1.5 The values stated in SI units are to be regarded as
D7669 Guide for Practical Lubricant Condition Data Trend
standard. No other units of measurement are included in this
Analysis
standard.
D7685 Practice for In-Line, Full Flow, Inductive Sensor for
1.5.1 Exception—Subsection 7.7 uses “G’s”.
Ferromagnetic and Non-ferromagnetic Wear Debris De-
termination and Diagnostics for Aero-Derivative and Air-
craft Gas Turbine Engine Bearings
1
This practice is under the jurisdiction ofASTM Committee D02 on Petroleum
D7720 Guide for Statistically Evaluating Measurand Alarm
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
Limits when Using Oil Analysis to Monitor Equipment
mittee D02.96.07 on Integrated Testers, Instrumentation Techniques for In-Service
Lubricants.
Current edition approved Oct. 1, 2018. Published November 2018. Originally
3
approved in 2014. Last previous edition approved in 2014 as D7917 – 14. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/D7917-14R18. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
The boldface numbers in parentheses refer to the list of references at the end of Standards volume information, refer to the standard’s Document Summary page on
this standard. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7917 − 14 (2018)
and Oil for Fitness and Contamination travel through unimpeded. In the latter case of the bypass loop,
G40 Terminology Relating to Wear and Erosion care must be taken to ensure a representativ
...

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1.3 This test method shall be used in conjunction with and shall conform to the requirements of Practice A34/A34M.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
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    English language
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  • Standard
    5 pages
    English language
    sale 15% off