ISO-21018-1-2008.pdf
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1、 Reference number ISO 21018-1:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 21018-1 First edition 2008-04-15 Hydraulic fluid power Monitoring the level of particulate contamination of the fluid Part 1: General principles Transmissions hydrauliques Surveillance du niveau de pollution particulaire des f
2、luides Partie 1: Principes gnraux Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 04:00:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 21018-1:2008(E) PDF discla
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5、 file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTEC
6、TED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs mem
7、ber body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Prov
8、ided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 04:00:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 21018-1:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative referen
9、ces. 1 3 Terms and definitions. 2 4 Health and safety 3 4.1 General. 3 4.2 Electric power . 3 4.3 Mechanical fluid power 4 4.4 Process liquids . 4 5 Selection of monitoring technique 4 5.1 General. 4 5.2 Selection 5 6 Procedures and precautions . 5 6.1 General. 5 6.2 Obtaining representative samples
10、 5 6.3 Off-line sampling. 5 6.4 On-line analysis 6 6.5 In-line analysis 6 6.6 Suction (sip) analysis from reservoirs or containers . 6 6.7 Calibration procedures. 7 6.8 Checking data validity 7 6.9 Training 7 6.10 Controlling the precision of the technique 8 7 Test report . 8 Annex A (informative) S
11、ummary of various technique attributes. 9 Annex B (informative) Description and relative merits of different contaminant monitoring techniques. 15 Bibliography. 24 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Re
12、sale, 07/25/2008 04:00:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 21018-1:2008(E) iv ISO 2008 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wo
13、rk of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governm
14、ental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The
15、main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
16、Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21018-1 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 6, C
17、ontamination control. ISO 21018 consists of the following parts, under the general title Hydraulic fluid power Monitoring the level of particulate contamination of the fluid: Part 1: General principles Part 3: Use of the filter blockage technique A Part 2, dealing with the calibration and verificati
18、on procedure for field contamination monitoring, and a Part 4, dealing with the use of the light extinction technique, are under development. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 04:00
19、:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 21018-1:2008(E) ISO 2008 All rights reserved v Introduction In hydraulic fluid power systems, power is transmitted through a liquid under pressure within a closed circuit. The liquid is both a lubricant and power-trans
20、mitting medium. The presence of solid particulate contamination in the liquid interferes with the ability of the hydraulic liquid to lubricate and causes wear to the components. The extent of this form of contamination in the liquid has a direct bearing on the performance and reliability of the syst
21、em and it is necessary that this be controlled to levels that are considered appropriate for the system concerned. Hydraulic filters are used to control the amount of particulate contamination to a level that is suitable for both the contaminant sensitivity of the system and the level of reliability
22、 required by the user. Operators of hydraulic equipment are gradually defining maximum particle concentration levels for components, systems and processes, beyond which corrective actions are implemented to normalize the levels. These are often referred to as the required cleanliness level (RCL). Th
23、e cleanliness level is obtained by sampling the hydraulic liquid and measuring the particulate contamination level. If the level is above the RCL, then corrective actions are necessary to restore the situation. To avoid taking unnecessary actions, which can often prove costly, precision in sampling
24、and measuring the particulate contamination level is required. A comprehensive range of measurement equipment is available, but the instruments used are usually laboratory-based. This often requires that the equipment is operated in a special environment by specialist laboratories and this delays de
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