BS ISO 21018-1-2008 Hydraulic fluid power - Monitoring the level of particulate contamination of the fluid - General principles《气液传动 流体颗粒污染的等级监测 一般原理》.pdf
《BS ISO 21018-1-2008 Hydraulic fluid power - Monitoring the level of particulate contamination of the fluid - General principles《气液传动 流体颗粒污染的等级监测 一般原理》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 21018-1-2008 Hydraulic fluid power - Monitoring the level of particulate contamination of the fluid - General principles《气液传动 流体颗粒污染的等级监测 一般原理》.pdf(34页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARDBS ISO 21018-1:2008Hydraulic fluid power Monitoring the level of particulate contamination of the fluid Part 1: General principlesICS 23.100.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g
2、55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 21018-1:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 53993 0National forewordThis British Standard is the UK implementation of ISO
3、21018-1:2008.The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Panel MCE/18/-/6, Contamination control.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not
4、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsReference numberISO 21018-1:2008(E)INTERNATION
5、AL STANDARD ISO21018-1First edition2008-04-15Hydraulic fluid power Monitoring the level of particulate contamination of the fluid Part 1: General principles Transmissions hydrauliques Surveillance du niveau de pollution particulaire des fluides Partie 1: Principes gnraux BS ISO 21018-1:2008ii iiiCon
6、tents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 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 a
7、nd precautions . 5 6.1 General. 5 6.2 Obtaining representative samples 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
8、precision of the technique 8 7 Test report . 8 Annex A (informative) Summary of various technique attributes. 9 Annex B (informative) Description and relative merits of different contaminant monitoring techniques . 15 Bibliography . 24 BS ISO 21018-1:2008iv Foreword ISO (the International Organizati
9、on for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work 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 ha
10、s the right to be represented on that committee. International organizations, governmental and non-governmental, 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. Inte
11、rnational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The 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. Publica
12、tion as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 rig
13、hts. ISO 21018-1 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 6, Contamination 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 pri
14、nciples Part 3: Use of the filter blockage technique A Part 2, dealing with the calibration and verification procedure for field contamination monitoring, and a Part 4, dealing with the use of the light extinction technique, are under development. BS ISO 21018-1:2008vIntroduction In hydraulic fluid
15、power systems, power is transmitted through a liquid under pressure within a closed circuit. The liquid is both a lubricant and power-transmitting medium. The presence of solid particulate contamination in the liquid interferes with the ability of the hydraulic liquid to lubricate and causes wear to
16、 the components. The extent of this form of contamination in the liquid has a direct bearing on the performance and reliability of the system 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 amou
17、nt of particulate contamination to a level that is suitable for both the contaminant sensitivity of the system and the level of reliability required by the user. Operators of hydraulic equipment are gradually defining maximum particle concentration levels for components, systems and processes, beyon
18、d which corrective actions are implemented to normalize the levels. These are often referred to as the required cleanliness level (RCL). The cleanliness level is obtained by sampling the hydraulic liquid and measuring the particulate contamination level. If the level is above the RCL, then correctiv
19、e actions are necessary to restore the situation. To avoid taking unnecessary actions, which can often prove costly, precision in sampling and measuring the particulate contamination level is required. A comprehensive range of measurement equipment is available, but the instruments used are usually
20、laboratory-based. This often requires that the equipment is operated in a special environment by specialist laboratories and this delays delivery of the test result to the user. To overcome this disadvantage, instruments are being continuously developed to determine the particulate contamination lev
21、el, either using equipment that can be operated in or near the workplace or directly using on-line or in-line techniques. For equipment operated in the workplace, direct traceability to national measurement standards might not be appropriate, or relevant, and the instruments are used to monitor the
22、general level of particulate contamination or to inform the user of a significant change in the level. When a significant change in the particulate contamination level is detected, the actual level is then usually qualified by using an approved particle-counting method. Also, these monitors can have
23、 simplified circuitry compared to similar laboratory units and this means that they are not so precise. In addition, some instruments are designed to work on the “go/no-go” principle and their ability to rapidly evaluate the cleanliness level has resulted in an increase in their usage both in the fl
24、uid power industry and other markets. Unfortunately, the lack of a standardized method for their use, recalibration (if applicable) and means of checking the output validity means that the variability in the measurement data is at a level higher than is desirable. This International Standard has bee
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