ISO/TR TECHNICAL REPORT 14179-2 First edition 2001-08-01 Gears Thermal capacity Part 2: Thermal load-carrying capacity Engrenages-Capacitethermique Partie2:Capacitedechargethermique Reference number ISO/TR 14179-2:2001(E) ISO @ISO2001 Not for Resale ISO/TR14179-2:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this area. AdobeisatrademarkofAdobeSystemsIncorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the 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 ISO2001 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 ISO's member body in the country of therequester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland @IsO2001-Allrightsreserved ted without license from IHS Not for Resale ISO/TR14179-2:2001(E) Contents Page Foreword Introduction Scope 2 Symbols, units and indices. 3 Principle.... 3.1 General.... 3.2 Purpose and applicability. 4 Equivalenttransmittedpower.. 5 Powerloss 5.1 General..... .8 5.2 Gearlosses .8 5.3 Bearing losses 15 5.4 Shaft seals.. 19 6 Heat dissipation.. 19 6.1 General..... 6.2 Heat dissipation through the housing. 19 6.3 Heat dissipation via the foundation... 22 6.4 Heat dissipation via shafts and couplings .24 6.5 Heat dissipation via an external cooler... 26 7 Results of calculation.. 27 7.1 Splash lubrication.. 27 7.2 Injection lubrication.. 27 8 Sample calculation ... 27 8.1 27 8.2 Geometryandsurrounding conditions 27 8.3 Powerloss.. 30 8.4 Heat dissipation 32 8.5 Comparison.... 33 Bibliography ili Copyright Interna from IHS Not for Resa