ISO-TR-13989-1-2000.pdf
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1、Reference number ISO/TR 13989-1:2000(E) ISO 2000 TECHNICAL REPORT ISO/TR 13989-1 First edition 2000-03-15 Calculation of scuffing load capacity of cylindrical, bevel and hypoid gears Part 1: Flash temperature method Calcul de la capacit de charge au grippage des engrenages cylindriques, coniques et
2、hypodes Partie 1: Mthode de la temprature-clair ISO/TR 13989-1:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and insta
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5、lease inform the Central Secretariat at the address given below. ISO 2000 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 writ
6、ing from either ISO at the address below or ISOs member 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 22 734 10 79 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2000 All rights reserved ISO/TR 1398
7、9-1:2000(E) ISO 2000 All rights reservediii ContentsPage Foreword.iv Introduction.v 1Scope 1 2Normative references1 3Terms, definitions, symbols and units.1 3.1Terms and definitions .1 3.2Symbols and units.1 4Scuffing and wear6 4.1Occurrence of scuffing and wear.6 4.2Transition diagram.6 4.3Friction
8、 at incipient scuffing.8 5Basic formulae.8 5.1Contact temperature8 5.2Flash temperature formula9 5.3Transverse unit load10 5.4Distribution of overall bulk temperatures .11 5.5Rough approximation of a bulk temperature12 6Coefficient of friction.12 6.1Mean coefficient of friction, method A.13 6.2Mean
9、coefficient of friction, method B 13 6.3Mean coefficient of friction, method C 13 7Parameter on the line of action 14 8Approach factor .16 9Load sharing factor .17 9.1Buttressing factor17 9.2Spur gears with unmodified profiles .18 9.3Spur gears with profile modification .19 9.4Narrow helical gears w
10、ith unmodified profiles.20 9.5Narrow helical gears with profile modification.20 9.6Wide helical gears with unmodified profiles.21 9.7Wide helical gears with profile modification.21 9.8Narrow bevel gears22 9.9Wide bevel gears23 10Scuffing temperature and safety24 10.1Scuffing temperature.24 10.2Struc
11、tural factor.24 10.3Contact exposure time25 10.4Scuffing temperature in gear tests.26 10.5Safety range .26 Annexe A (informative) Flash temperature formula presentation.28 Annexe B (informative) Optimal profile modification 35 Bibliography37 ISO/TR 13989-1:2000(E) iv ISO 2000 All rights reserved For
12、eword 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 interested in a subject for which a tech
13、nical 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 Commission (IEC) on all matters of
14、 electrotechnical standardization. The main task of technical committees is to prepare International Standards, but in exceptional circumstances a technical committee may propose the publication of a Technical Report of one of the following types: ?type 1, when the required support cannot be obtaine
15、d for the publication of an International Standard, despite repeated efforts; ?type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; ?type 3, when a technical committ
16、ee has collected data of a different kind from that which is normally published as an International Standard (“state of the art“, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into International Sta
17、ndards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. Technical Reports are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Attention is drawn to the possibility that some o
18、f the elements of this part of ISO/TR 13989 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 13989-1, which is a Technical Report of type 2, was prepared by Technical Committee ISO/TC 60,Gears, Subcommittee SC 2,Gear capacit
19、y calculation. ThisdocumentisbeingissuedintheTechnicalReport(type 2)seriesofpublications(accordingto subclause G.3.2.2 of Part 1 of the ISO/IEC Directives, 1995) as a “prospective standard for provisional application” in the field of scuffing load capacity of gears because there is an urgent need fo
20、r guidance on how standards in this field should be used to meet an identified need. In 1975, two methods to evaluate the risk of scuffing were documented to be studied by ISO/TC 60. It was agreed that after a period of experience one method shall be selected. Since the subject is still under techni
21、cal development and there is a future possibility of an agreement on an International Standard, the publication of a type 2 Technical Report was proposed. This document is not to be regarded as an “International Standard”. It is proposed for provisional application so that information and experience
22、 of its use in practice may be gathered. Comments on the content of this document should be sent to the ISO Central Secretariat. A review of this Technical Report (type 2) will be carried out not later than three years after its publication with the options of: extension for another three years; con
23、version into an International Standard; or withdrawal. ISO/TR 13989 consists of the following parts, under the general titleCalculation of scuffing load capacity of cylindrical, bevel and hypoid gears: ?Part 1: Flash temperature method ?Part 2: Integral temperature method Annexes A and B of this par
24、t of ISO 13989 are for information only. -,-,- ISO/TR 13989-1:2000(E) ISO 2000 All rights reservedv Introduction Since 1990 the flash temperature method, presented in this part of ISO/TR 13989, was enriched with research for short exposure times, consideration of transition diagrams, new approximati
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