BS-ISO-2790-2004.pdf
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1、BRITISH STANDARD BS ISO 2790:2004 Belt drives V-belts for the automotive industry and corresponding pulleys Dimensions ICS 43.060.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2790:2004 This British Standard was published under
2、 the authority of the Standards Policy and Strategy Committee on 7 July 2005 BSI 7 July 2005 ISBN 0 580 45933 0 National foreword This British Standard reproduces verbatim ISO 2790:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical
3、Committee MCE/10, Belts and pulley drives, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found i
4、n the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsi
5、ble for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK i
6、nterests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this docum
7、ent indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 2790 Fourth edition 2004-09-15 Reference number ISO 2790:20
8、04(E) Belt drives V-belts for the automotive industry and corresponding pulleys Dimensions Transmissions par courroies Courroies trapzodales pour la construction automobile et poulies correspondantes Dimensions BS ISO 2790:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:0
9、0 2006, Uncontrolled Copy, (c) BSI ii BS ISO 2790:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page 1Scope 1 2Normative references 1 3Terms, definitions and symbols . 1 4Belts 1 4.1General . 1 4.2Cross-section and pitch
10、zone 1 4.3Measurement of the effective length of a belt and its ride-out . 2 4.4Centre distance variations . 4 5Service pulleys . 4 5.1Dimensions 4 5.2Checking of effective diameter 6 5.3Designation 7 BS ISO 2790:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Un
11、controlled Copy, (c) BSI iv Foreword ISO (the International Organization 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 intereste
12、d 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Com
13、mission (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 main task of technical committees is to prepare International Standards. Draft International Standards adopted by the techni
14、cal 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. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sh
15、all not be held responsible for identifying any or all such patent rights. ISO 2790 was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 1, Friction. This fourth edition cancels and replaces the third edition (ISO 2790:1989), subclauses 4.1, 4.2 and
16、5.1, Tables 1, 2, 4 and 5, of which have been technically revised and a new Figure 5 added. BS ISO 2790:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Belt drives V-belts for the automotive industry and corresponding pulleys Dimensio
17、ns 1Scope This International Standard specifies the requirements for belts and pulleys for V-belt drives used for driving auxiliaries of internal combustion engines for the automotive industry. 2Normative references The following referenced documents are indispensable for the application of this doc
18、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1081, Belt drives V-belts and V-ribbed belts, and corresponding grooved pulleys Vocabulary ISO 8370-1:1993, Belt drives Dynamic t
19、est to determine pitch zone location Part 1: V-belts ISO 9608, V-belts Uniformity of belts Test method for determination of centre distance variation 3Terms, definitions and symbols For the purposes of this document, the terms, definitions and symbols relating to drives using V-belts (i.e. belts and
20、 grooved pulleys) defined in ISO 1081 apply. 4Belts 4.1General A belt is defined by its cross-section (groove profile AV 10 to AV 17) and by its effective length, in millimetres, measured under specified conditions. 4.2Cross-section and pitch zone A cross-section of a belt is defined by the nominal
21、top width, (see Figure 1 and Table 1). The position of the belt pitch zone in the pulley groove is defined by the effective line differential, (see Figure 4 and Table 1). The nominal belt included angle is unless agreed otherwise between customer and belt manufacturer. w be 40 BS ISO 2790:2004 Licen
22、sed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 4.3Measurement of the effective length of a belt and its ride-out Set the belt up on two identical pulleys, having the dimensions shown in Table 2 and mounted on a horizontal bench, and apply to t
23、he sliding pulley the measurement tension (see Figure 2). Rotate the belt at least twice to seat it properly. The effective length of the belt, , is given by the equation: where is the measured maximum centre distance of the pulleys; is the measured minimum centre distance of the pulleys; is the eff
24、ective circumference of one pulley: The ride-out, , of the belt (see Figure 3) shall be such that: for each type of belt. a Notched (optional). Figure 1 Profile of the belt Table 1 Dimensions of belt cross-sections Dimensions in millimetres ParameterSymbol AV 10AV 13AV 17 Wrapped belt Raw-edged belt
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