1、BSISO22089:2009ICS49.080NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBY COPYRIGHTLAWBRITISHSTANDARDAerospaceHydraulicpowertransferunitsGeneralspecificationsThis British Standardwas publishedunderthe authority of theStandards PolicyandStrategy Committee on 30November2009.BSI 2009ISBN9780580628351Ame
2、ndments/corrigendaissuedsincepublicationDate CommentsBSISO22089:2009NationalforewordThis British Standard is the UK implementationofISO 22089:2009.The UK participation in its preparation was entrustedtoTechnicalCommittee ACE/69, Aerospace hydraulic systems, fluids andcomponents.Alist of organization
3、srepresented on thiscommittee canbeobtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof acontract. Users areresponsible for itscorrect application.CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.BS ISO 22089:2009Refere
4、nce numberISO 22089:2009(E) ISO 2009INTERNATIONAL STANDARDISO22089First edition2009-02-15Aerospace Hydraulic power transfer units General specifications Aronautique Units de transfert de puissance hydraulique Spcifications gnralesBS ISO 22089:2009ISO 22089:2009(E)PDF disclaimerThisPDF file may conta
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6、ity of not infringing Adobes licensing policy. The ISO Central Secretariataccepts no liability in this area.Adobe is a trademark of Adobe Syste ms Incorporated.Details ofthe software products used to create thisPDF file can be found in the General Info relative to the file;the PDF-creationparameters
7、 were optimized for printing. Every care has been taken to ensure that thefile is suitable for use by ISO member bodies. Inthe unlikely event that a problem relating t o it isfound, please infor m the Central Secretariat at the address given below.COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights res
8、erved. Unless otherwisespecified, no part of this publicationmay 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 t he address be low orISOs member body in the country of the request
9、er.ISO copyright officeCase postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published inSwitzerland ii ISO 2009 All rights reservedBS ISO 22089:2009ISO 22089:2009(E) ISO 2009 All rights reserved iiiContents PageForeword. vIntroduction
10、. vi1Scope. 12Normative references. 13Terms and definitions. 24Classification. 85General requirements. 95.1 General. 95.2 Hydraulic system characteristics 95.3 Airworthiness requirements 105.4 Qualification 106Functional requirements 106.1 Hydraulic fluid. 106.2 PTU pump/motor displacement.106.3 PTU
11、 pressure. 116.4 PTU pump pressure 126.5 Motor pressure 146.6 Case drain pressures. 146.7 Flows 146.8 Leakage 156.9 Speed and direction of rotation. 166.10 Efficiency. 186.11 Control. 186.12 Rated temperature 216.13 Acoustic noise level . 216.14 Endurance . 216.15 Environmental requirements. 227Deta
12、il design requirements 227.1 Dimensionally critical components 227.2 Maintainability features 227.3 Seals. 237.4 Lubrication 237.5 Balance 237.6 System separation/rip-stop . 237.7 Drive shaft. 237.8 Self-contained failure . 237.9 Safety wire sealing 237.10 Electro-conductive bonding 237.11 Marking 2
13、48Strength requirements.248.1 Pressure loads 248.2 Proof pressures 248.3 Burst pressure 258.4 Pressure impulse (fatigue). 268.5 Pressure and structural load. 268.6 Port strength . 26BS ISO 22089:2009ISO 22089:2009(E)iv ISO 2009 All rights reserved9 Construction269.1 Materials.269.2 Corrosion protect
14、ion 279.3 Castings.2810 Installation requirements.2810.1 Dimensions2810.2 Mass .2810.3 Mounting2810.4 Ports.2811 Maintenance.2811.1 Maintenance concept2811.2 Service life limitations and storage specifications2812 Reliability.2912.1 Equipment compliance.2912.2 Requirements2913 Quality assurance prov
15、isions2913.1 Responsibility for inspection.2913.2 Classification of tests.2913.3 Test stand requirements 2914 Acceptance tests.3014.1 General.3014.2 Examination of the product3014.3 Test programme and inspection methods.3015 Qualification tests.3515.1 Purpose3515.2 Qualification procedure35BS ISO 22
16、089:2009ISO 22089:2009(E) ISO 2009 All rights reserved vForeword 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
17、. Each member body interested in a subject for which a tec hnical committee has beenestablished 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 closelywith the Interna
18、tional Electrotechnical Commission (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 Stand
19、ardsadopted by the technical 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
20、 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22089 was prepared by Technical Committee ISO/TC20, Aircraft and space vehicles , Subcommittee SC 10, Aerospacefluid systems and components . BS ISO 22089:2009ISO 22089:2009(E)vi ISO 2009 All righ
21、ts reservedIntroduction Hydraulic power transfer units (PTUs) are designed to transfer hydraulic power, but not hydraulic fluid,between two independent hydraulic sy stems, or between hydraulic sub-systems.This International Standard establishes the general requirements for PTUs, includ ing: design r
22、equirements; testrequirements.BS ISO 22089:2009INTERNATIONAL STANDA RD ISO 22089:2009(E) ISO 2009 All rights reserved 1Aerospace Hydraulic power transfer units General specifications 1 Scope This International Standard establishes the general requirements for hydraulic Power Transfer Units (PTUs).Th
23、is International Standard covers uni-directional and bi-directional PTUs. This International Standard is used in conjunction with the detail specification particular to each application. 2 NormativereferencesThe following referenced documents are indispensable for the application of this document. F
24、or datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.ISO 2093, Electroplated coatings of tin Specification and testmethodsISO 2669, Environmental tests for aircraft equipment Steady-state accelerat
25、ionISO 2671, Environmental tests for aircraft equipment Part 3.4: Acoustic vibrationISO 3323, Aircraft Hydraulic components Marking to indicate fluid for which component is approvedISO 3601-1, Fluid power systems O-rings Part 1: Inside diameters, cross-sections, tolerances anddesignation codesISO 71
26、37, Aircraft Environmental conditions and test procedures for airborne equipment ISO 7320, Aerospace Couplings, threaded and sealed, for fluid systems DimensionsISO 8078, Aerospace process Anodic treatment of aluminium alloys Sulfuric acid process, undyedcoatingISO 8079, Aerospace process Anodic tre
27、atment of aluminium alloys Sulfuric acid process, dyed coatingISO 8081, Aerospace process Chemical conversion coating for aluminium alloys General purposeISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions relatedtopressureISO 8625-2, Aerospace Fluid systems Vocabula
28、ry Part 2: General terms and definitions relating toflow ISO 8625-3, Aerospace Fluid systems Vocabulary Part 3: General terms and definitions relating totemperature ISO 11218, Aerospace Cleanlinessclassification foraeronautical fluidsBS ISO 22089:2009ISO 22089:2009(E)2 ISO 2009 All rights reserved3
29、Terms and definitions For the purposes of this document the terms and definitions given in ISO8625-1, ISO 8625-2 and ISO8625-3 and the following apply.3.1 Power Transfer Unit (PTU)hydraulic device that is able to transfer hydraulic power between two independent hydraulic systems (or sub-systems) wit
30、hout transferring hydraulic fluid NOTE The PTU generally consists of two rotating groups, housed separately and connected by a driveshaft.Hydraulic energy supplied to the hydraulic motor from one system drives the pump, providing hydraulic power to the othersystem. 3.2 uni-directional PTU hydraulic
31、pump that transfers hydraulic power between two independent hydraulic systems (or sub-systems), in one direction only, such that the pump and motor cannot reverse their functions3.3 bi-directional PTU hydraulic pump that transfers hydraulic power between two independent hydraulic systems (or sub-sys
32、tems)in either direction NOTE The PTU acts to provide hydraulic power to the system that is experiencing the greater power demand usinghydraulic power from the other (lower demand) system. The pump and motor can reverse their functions such that thepump can function as a motor and vice-versa, depend
33、ing on the direction of operation. 3.4 purchaser organization that has the engineering responsibility for the hydraulic system that includes the PTU and who approves the supplier for the design, development and manufacture of aerospace PTUsNOTE Typically, the purchaser is an aircraft manufacturer, a
34、n equipment manufacturer that has hydraulic systemresponsibility or a modification centre. The purchaser is responsible for the compilation of the detail specification. 3.5 detail specification document that specifies the following: a) technical requirements;b) acceptance and qualification test requ
35、irements;c) reliabilityrequirements;d) qualityrequirements;e) packaging requirements;f) other requirements.3.6 suppliermanufacturer of the PTU, responsible for the design, production and qualification of the PTU 3.7 ports of the uni-directional PTU 3.7.1 pump case drain port(if included) port that d
36、rains internal leakage flow to the reservoirBS ISO 22089:2009ISO 22089:2009(E) ISO 2009 All rights reserved 33.7.2 pump inlet port port that receives flow from the hydraulic reservoir to supply the pump 3.7.3 pump discharge port port that supplies pressurized f low to the system3.7.4 motor case drai
37、n port (if included) port that drains motor internal leakage flow to the reservoir3.7.5 motor supply port port that receives flow from the hydraulic system to power the motor3.7.6 motor return portport that returns flow to the reservoir3.7.7 shaft seal portport that routes any shaft seal leakage fro
38、m the PTU to an overboard drain, collector tank, etc.3.8 ports of the bi-directional PTU 3.8.1 case drain port(if included) port that drains internal leakage flow to the reservoir3.8.2 HP port port that receives flow from the hydraulic system to power the motor, or supplies pressurized flow to the s
39、ystemNOTE When the PTU half is acting as a pump, the HP port supplies pressurized flow to the system. When the PTUhalf is acting as a motor, the HP port receives flow from the hydraulic system. 3.8.3 LP port port that returns flow to the reservoir or flow from the hydraulic reservoir to supplythe pu
40、mpNOTE When the PTU half is acting as a pump, the LP port receives flow from the hydraulic reservoir. When the PTUhalf is acting as a motor, the LP port returns flow to the reservoir. 3.8.4 shaft seal portport that routes any shaft seal leakage from the PTU to an overboard drain, collector tank, etc
41、.3.9 design operating pressurenormal maximum steady pressureNOTE Excluded are reasonable tolerances, transient pressure effects such as may arise from: pressure ripple; reactions to system functioning; demands that may affect fatigue. BS ISO 22089:2009ISO 22089:2009(E)4 ISO 2009 All rights reserved3
42、.10 break-out pressure minimum difference between the pump and motor differential pressures at which the PTU motor will start operating under conditions specified in the detail specification NOTETypically, the PTUwill not act to provide power until a threshold breakout differential pressure betweens
43、ystems (or sub-systems) has been exceeded. 3.11 rated case-drain pressurenominal pressure at which the PTU pump and motor cases are required to operate continuously in the system3.12 maximum transient case pressure maximum pressure peak that can be imposed by the hydraulic system on the pump or moto
44、r case drain port 3.13 maximum transient discharge pressure pressure recorded during a disc rete transient event normally found whilst cycling from full-flow pressure torated pressure (zero flow)3.14 maximum pumpcase drain pressure maximum continuous pressure developed by the PTU pump to enable case
45、 drain fluid to return to the reservoir 3.15 maximum inlet pressuremaximum steady state inlet pressure at which the PTU pump might b e required to operate during a systemfailure or during a system high-flow transient condition3.16 minimum inlet pressure lowest inlet pressure, specified by the purcha
46、ser, for which the supplier ensures that the PTU pump might berequired to operate without cavitation during a system failure or during a system high-flow transient condition NOTEFor the purposes of this International Standard, cavitation isassumed to occur when there is a 2% reductionin discharge fl
47、ow with reducing inlet pressure. 3.17 rated inlet pressureminimum pressure measured at the inlet port of the PTU pump at which the PTU is required to provide theperformance without any degradation, with all the other parameters at their rated values, except for the fluid temperature, which is the mi
48、nimum continuous temperature 3.18 maximum full-flow pressure for category C PTUs maximum discharge pressure atwhich the pump control will not be acting to reduce pump delivery flow, atrated temperature, rated motor supply and return pressures, pump rated inlet and case drain pressureNOTE Maximum ful
49、l-flow pressure is not applicable to categories A and B PTUs. 3.19 rated discharge pressure for categoriesAand B PTUsminimum discharge pressure that is met with rated motor differential pressure applied, at the minimum steadystate discharge flow just prior to stall and with all other parameters at rated conditionsBS ISO 22089:2009ISO 22089:2009(E) ISO 2009 All rights reserved 53.20 rated discharge pressure (or stall pressure) for category C PTUs nominal pressure that the
