ISO INTERNATIONAL STANDARD 10767-1 Second edition 2015-10-01 Hydraulic fluid power - Determination of pressure ripple levels generated in systems and components Part 1: Method for determining source flow ripple and source impedance of pumps Transmissions hydrauliques - Détermination des niveaux d'onde de pression engendres dans les circuits et composants - Partie 1: Methode de deétermination de I'onde de flux de la source et de I'impédance de la source des pompes Reference number IS0 10767-1:2015(E) SO International Organization for Standardization @ IS0 2015 ardization5956617 I without license from IHS IS0 10767-1:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 0111 Fax+41227490947 [email protected] www.iso.org Intenationai br PrganizationforStandardization I by IHS unde Not for Resale, 2015/11/30 07:11:16 etworking permitted without license from IHS IS0 10767-1:2015(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references ...1. 3 Terms and definitions 4 Instrumentation. .3 4.1 Static measurements .3 4.2 Dynamic measurements ..4 4.3 Frequency analysis of pressure ripple. ..4 5 Pump installation ..4 5.1 General. .4 5.2 Drive vibration ..5 5.3 Reference signal .5 6 Test conditions and setting 6.1 General .5 6.2 Mean flow. .5 6.3 Mean discharge pressure .5 6.4 Pump shaft speed. ..5 6.5 Fluid temperature. .5 6.6 Fluid property .6 7 Test rig. .6 7.1 General. 7.2 Test pump. .6 7.3 Test fluid .6 7.4 Inletline ..6 7.5 Inlet pressure gauge (for static pressure) 7.6 Pump discharge line 1 7.6.1 General. .7 7.6.2 Pump discharge port connection ..8 7.6.3 Reference pipe ..8 7.6.4 Connecting pipe .8 7.6.5 Extension pipe 9 7.7 Pressure transducer. .9 7.7.1 Dynamic pressure transducer .9 7.7.2 Static pressure transducer 7.8 Loadingvalve .9 7.9 Back pressure valve 7.10 Safety valve. 9 8 Test procedure. .10 8.1 General. .10 8.2 Frequency analyses of pressure ripple. ..11 8.3 Evaluation of source flow ripple, Qs, in the standard “Norton' model ..11 8.4 Evaluation of source impedance, Zs, in the standard"Norton" model ..12 8.5 Evaluation of source flow ripple, Qs*, in the modified model ..12 8.6 Evaluation of blocked acoustic pressure ripple rating ..13 9 Test report ..13 9.1 General information and test conditions. .13 9.2 Testresults.. ..13 10 Identification statement (Reference to this part of IS0 10767) ..14 Annex A (normative) Test forms. ..15 iii Isee=Zhejang Insttute of Standardization 5956617 ed without license from IHS