1、BSI Standards Publication BS ISO 8278:2016 Aerospace series Hydraulic, pressure compensated, variable delivery pumps General requirementsBS ISO 8278:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 8278:2016. It supersedes BS M 65:1987 and BS ISO 12334:20
2、00 which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace hydraulic systems, fluids and com- ponents. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to i
3、nclude all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 82363 3 ICS 49.080 Compliance with a British Standard cannot confer immunity from legal obligations. Th
4、is British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2016. Amendments/corrigenda issued since publication Date Text affectedBS ISO 8278:2016 ISO 2016 Aerospace series Hydraulic, pressure compensated, variable delivery pumps General requirem
5、ents Srie arospatiale Pompes hydrauliques dbit variable rgul en fonction de la pression Exigences gnrales INTERNATIONAL STANDARD ISO 8278 Second edition 2016-03-01 Reference number ISO 8278:2016(E)BS ISO 8278:2016ISO 8278:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016,
6、Published in Switzerland 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. Pe
7、rmission can be requested from either ISO at the address below or ISOs 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 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 8278:2016ISO 8278:201
8、6(E)Foreword vi 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 2 4 General requirements . 6 4.1 Order of precedence . 6 4.2 Hydraulic system characteristics 6 4.3 Airworthiness requirements. 7 4.4 Qualification 7 5 Functional requirements . 7 5.1 Hydraulic fluid . 7 5.2 Pump pressur
9、e 7 5.2.1 Rated discharge pressure . 7 5.2.2 Maximum full-flow pressure . 7 5.2.3 Pressure pulsations . 8 5.2.4 Inlet pressure 8 5.3 Case drain pressure 8 5.3.1 Rated case drain pressure 8 5.3.2 Maximum transient case drain pressure 8 5.3.3 Maximum case drain pressure . 8 5.4 Flows 9 5.4.1 Pump rate
10、d discharge flow . 9 5.4.2 Pump case flow . 9 5.4.3 Shaft seal leakage flow 9 5.4.4 External leakage . 9 5.5 Speed and direction of rotation .10 5.5.1 Rated speed .10 5.5.2 Overspeed .10 5.5.3 Direction of rotation 10 5.6 Torque 10 5.7 Pump overall efficiency 10 5.8 Variable delivery control .15 5.8
11、.1 General.15 5.8.2 Adjustment .15 5.8.3 Response time .15 5.8.4 Stability .16 5.8.5 Maximum transient pressure .17 5.9 Rated temperature 17 5.10 Acoustic noise level 17 5.11 Endurance 17 5.12 Environmental requirements 18 6 Detail design requirements .18 6.1 Dimensionally critical components 18 6.2
12、 Maintainability features .18 6.3 Seals .19 6.4 Lubrication 19 6.5 Balance 19 6.6 Self-contained failure .19 6.7 Safety wire sealing 19 6.8 Electro-conductive bonding 19 6.9 Marking 19 6.9.1 Nameplate .19 ISO 2016 All rights reserved iii Contents PageBS ISO 8278:2016ISO 8278:2016(E)6.9.2 Fluid ident
13、ification 20 6.9.3 Ports .20 7 Strength requirements 20 7.1 General 20 7.2 Pressure loads 20 7.3 Proof pressure 20 7.3.1 Pump case .20 7.3.2 Pump inlet port 20 7.3.3 Pump discharge port .20 7.4 Ultimate pressure 21 7.4.1 Pump case .21 7.4.2 Pump inlet port 21 7.4.3 Pump discharge port .21 7.5 Pressu
14、re impulse (fatigue) 21 7.6 Port strength 21 8 Construction requirements 21 8.1 Materials 21 8.1.1 General.21 8.1.2 Metals .22 8.2 Corrosion protection .22 8.2.1 General.22 8.2.2 Ferrous and copper alloys 23 8.2.3 Aluminium alloys 23 8.3 Castings 23 9 Installation requirements23 9.1 Dimensions 23 9.
15、2 Mass .23 9.3 Mounting .23 9.4 Orientation 24 9.5 Drive coupling .24 9.6 Ports 24 10 Maintenance requirements 24 10.1 Maintenance concept 24 10.2 Service life limitations and storage specifications 25 11 Reliability requirements .25 11.1 Equipment compliance .25 11.2 Requirements 25 12 Quality assu
16、rance provisions .25 12.1 Responsibility for inspection .25 12.2 Classification of tests 25 12.3 Test stand requirements 26 13 Acceptance tests .26 13.1 General 26 13.2 Examination of the product 26 13.3 Test programme 26 13.3.1 General.26 13.3.2 External leakage requirements 27 13.3.3 Break-in run
17、27 13.3.4 Proof pressure test 27 13.3.5 Load cycles .27 13.3.6 Teardown inspection examination 27 13.3.7 Run-in .28 13.3.8 Functional tests 28 13.3.9 Pressure control test .28 13.3.10 Calibration 28 iv ISO 2016 All rights reservedBS ISO 8278:2016ISO 8278:2016(E)13.3.11 Fluid contamination test 29 13
18、.3.12 Electro-conductive bonding 30 13.4 Storage and packaging .30 14 Qualification t ests 30 14.1 Purpose .30 14.2 Qualification procedure 30 14.2.1 Qualification by analogy .30 14.2.2 Pump qualification test report 30 14.2.3 Samples and program of qualification tests 31 14.3 Qualification testing
19、31 14.3.1 Dimensional check 31 14.3.2 Expanded envelope acceptance tests 32 14.3.3 Calibration 32 14.3.4 Maximum pressure and response time tests 32 14.3.5 Pressure pulsation test 34 14.3.6 Heat rejection test 34 14.3.7 Endurance test 35 14.3.8 Minimum inlet pressure test 40 14.3.9 Environmental tes
20、ts .41 14.3.10 Structural tests .41 14.3.11 Supplementary tests 43 Bibliography .44 ISO 2016 All rights reserved vBS ISO 8278:2016ISO 8278:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
21、 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 has the right to be represented on that committee. International organizations, governmental and non-governmental
22、, 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. The procedures used to develop this document and those intended for its further maintenance are described in the IS
23、O/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibil
24、ity 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 rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pa
25、tent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as in
26、formation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components.
27、 This second edition cancels and replaces the first edition (ISO 8278:1986) and ISO 12334:2000, which have been technically revised.vi ISO 2016 All rights reservedBS ISO 8278:2016INTERNATIONAL ST ANDARD ISO 8278:2016(E) Aerospace series Hydraulic, pressure compensated, variable delivery pumps Genera
28、l requirements 1 Scope This International Standard establishes the general requirements for pressure compensated, variable delivery hydraulic pumps, suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi). This International Standard is to be used in conjunction with
29、 detail specifications that is particular to each application. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the
30、 latest edition of the referenced document (including any amendments) applies. ISO 2093, Electroplated coatings of tin Specification and test methods ISO 2669, Environmental tests for aircraft equipment Steady-state acceleration ISO 2671, Environmental tests for aircraft equipment Part 3.4 : Acousti
31、c vibration ISO 2685, Aircraft Environmental test procedure for airborne equipment Resistance to fire in designated fire zones ISO 3323, Aircraft Hydraulic components Marking to indicate fluid for which component is approved ISO 3601-1:2012, Fluid power systems O-rings Part 1: Inside diameters, cros
32、s-sections, tolerances and designation codes ISO 7137, Aircraft Environmental conditions and test procedures for airborne equipment ISO 7320, Aerospace Couplings, threaded and sealed, for fluid systems Dimensions ISO 8078, Aerospace process Anodic treatment of aluminium alloys Sulfuric acid process,
33、 undyed coating ISO 8079, Aerospace process Anodic treatment of aluminium alloys Sulfuric acid process, dyed coating ISO 8081, Aerospace process Chemical conversion coating for aluminium alloys General purpose ISO 8399-1, Aerospace Accessory drives and mounting flanges (Metric series) Part 1: Design
34、 criteria ISO 8399-2, Aerospace Accessory drives and mounting flanges (Metric series) Part 2: Dimensions ISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions related to pressure ISO 8625-2, Aerospace Fluid systems Vocabulary Part 2: General terms and definitions relat
35、ing to flow ISO 8625-3, Aerospace Fluid systems Vocabulary Part 3: General terms and definitions relating to temperature ISO 2016 All rights reserved 1BS ISO 8278:2016ISO 8278:2016(E) ISO 11218: 1) , Aerospace Cleanliness classification for hydraulic fluids 3 T erms a nd definiti ons For the purpose
36、s of this document, the terms and definitions given in ISO 8625-1, ISO 8625-2, ISO 8625-3, and the following apply. 3.1 variable delivery hydraulic pump self-regulating hydraulic pump that supplies hydraulic power to the hydraulic system (or subsystem) at a nominal constant pressure Note 1 to entry:
37、 The pump can be driven by a variety of power sources, including the following: by an engine via an accessory gearbox; electric motor; pneumatic power drive. 3.2 purchaser organization that has the engineering responsibility for the hydraulic system that includes the pump Note 1 to entry: Typically,
38、 the purchaser is an aircraft manufacturer, an equipment manufacturer that has hydraulic system responsibility or a modification centre. Note 2 to entry: The purchaser is responsible for the compilation of the detail specification. 3.3 d e t ail sp ecif i c a t i o n document compiled by the purchas
39、er that specifies the following: a) technical requirements; b) acceptance and qualification test requirements; c) reliability requirements; d) quality requirements; e) packaging requirements; f) other requirements 3.4 supplier organization that provides the pump Note 1 to entry: Typically, the suppl
40、ier is the manufacturer of the pump who will be responsible for the design, production and qualification of the pump. 3.5 Ports of the hydraulic pump 3.5.1 pump inlet port port that receives flow from the hydraulic reservoir to supply the pump 1) To be published. (Revision of ISO 11218:1993)2 ISO 20
41、16 All rights reservedBS ISO 8278:2016ISO 8278:2016(E) 3.5.2 pump discharge port port that supplies pressurized flow to the system 3.5.3 pump case drain port port that drains internal leakage flow to the reservoir 3.5.4 shaft seal port port that routes any shaft seal leakage from the pump to an over
42、board drain, collector tank, etc. 3.6 Temperature terms 3.6.1 rated temperature maximum continuous temperature of the fluid to be supplied at the supply port of the pump Note 1 to entry: The rated temperature is expressed in degrees centigrade. 3.6.2 minimum continuous temperature minimum continuous
43、 temperature of the fluid to be supplied at the supply port of the pump Note 1 to entry: The minimum continuous temperature is expressed in degrees centigrade. 3.7 Pressure terms 3.7.1 design operating pressure normal maximum steady pressure Note 1 to entry: Excluded are reasonable tolerances, trans
44、ient pressure effects such as may arise from pressure ripple, reactions to system functioning, and demands that may affect fatigue. 3.7.2 Inlet pressure 3.7.2.1 rated inlet pressure minimum pressure measured at the inlet port of the pump at which the pump is required to provide performance without a
45、ny degradation, with all other parameters at their rated values, except for the fluid temperature, which is the minimum continuous temperature 3.7.2.2 maximum inlet pressure maximum steady-state inlet pressure at which the pump may be required to operate 3.7.2.3 minimum inlet pressure lowest pump in
46、let port pressure, specified by the purchaser, for which the supplier ensures that the pump might be required to operate without cavitation during a system failure or when the pump is delivering the maximum flow Note 1 to entry: For the purposes of this International Standard, cavitation is assumed
47、to occur when there is a 2 % reduction in discharge flow with reducing inlet pressure. ISO 2016 All rights reserved 3BS ISO 8278:2016ISO 8278:2016(E) 3.7.3 discharge pressure maximum pressure against which the pump is required to operate continuously at rated temperature, at rated speed and at zero
48、flow Note 1 to entry: See Figure 1. Note 2 to entry: This diagram is given as an indication. It may be presented in a different way, for example, the axes may be reversed. 1 2 q q q A N Key 1 actual discharge/pressure characteristic curve 2 at p M , q A q N p pressure p M maximum full-flow pressure
49、(3.7.3.1) p N rated discharge pressure p tolerance range q discharge flow q A maximum rated discharge flow (3.8) q N minimum rated discharge flow Figure 1 Delivery/pressure characteristic curve of pumps 3.7.3.1 m a x i m u m f u l l - f l o w p r e s s u r e maximum discharge pressure at which the pump control will not be acting to reduce pump discharge, at rated temperature, rated speed, rated inlet and case drain pressure 3.7.3.2 maximum pump d
