ISO 9206:2018
(Main)Aerospace — Fixed displacement hydraulic motors — General specifications
Aerospace — Fixed displacement hydraulic motors — General specifications
This document establishes the general requirements for constant displacement hydraulic motors, suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi). Primary and secondary function motors (see Clause 4) are covered in this document; however, actuators with internal rotation angle limits and low-speed motors are not covered. This document is to be used in conjunction with the detail specification that is particular to each application.
Aéronautique et espace — Moteurs hydrauliques à cylindrée fixe — Spécifications générales
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 9206
Third edition
2018-12
Aerospace — Fixed displacement
hydraulic motors — General
specifications
Aéronautique et espace — Moteurs hydrauliques à cylindrée fixe —
Spécifications générales
Reference number
ISO 9206:2018(E)
ISO 2018
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ISO 9206:2018(E)
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© ISO 2018
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ISO 9206:2018(E)
Contents Page
Foreword ........................................................................................................................................................................................................................................vi
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ...................................................................................................................................................................................... 1
3 Terms and definitions ..................................................................................................................................................................................... 2
4 Classification ............................................................................................................................................................................................................ 6
5 General requirements ..................................................................................................................................................................................... 6
5.1 Order of precedence ........................................................................................................................................................................... 6
5.2 Hydraulic system characteristics ............................................................................................................................................ 7
5.3 Airworthiness regulations ............................................................................................................................................................ 7
5.4 Qualification .............................................................................................................................................................................................. 7
6 Functional requirements ............................................................................................................................................................................. 7
6.1 Hydraulic fluid ......................................................................................................................................................................................... 7
6.2 Pressures ...................................................................................................................................................................................................... 7
6.2.1 Rated supply pressure................................................................................................................................................. 7
6.2.2 Rated differential pressure ..................................................................................................................................... 7
6.2.3 No-load break-out pressure ................................................................................................................................... 8
6.2.4 Motor outlet port pressure ..................................................................................................................................... 8
6.2.5 Case drain pressure ....................................................................................................................................................... 8
6.3 Flows ................................................................................................................................................................................................................ 8
6.3.1 Rated consumption ........................................................................................................................................................ 8
6.3.2 Case drain flow .................................................................................................................................................................. 8
6.3.3 Shaft seal leakage flow ................................................................................................................................................ 8
6.3.4 External leakage ............................................................................................................................................................... 9
6.4 Speed and direction of rotation ................................................................................................................................................ 9
6.4.1 Speed .......................................................................................................................................................................................... 9
6.5 Torque ..........................................................................................................................................................................................................12
6.5.1 Rated torque .....................................................................................................................................................................12
6.5.2 Break-out torque ...........................................................................................................................................................12
6.5.3 Stalling torque .................................................................................................................................................................12
6.5.4 Torque pulsations ........................................................................................................................................................12
6.6 Motor overall efficiency ................................................................................................................................................................12
6.7 Dynamic characteristics ...............................................................................................................................................................12
6.7.1 General...................................................................................................................................................................................12
6.7.2 Dynamic braking ...........................................................................................................................................................12
6.7.3 Rapid reversals ...............................................................................................................................................................13
6.8 Passive operation ...............................................................................................................................................................................13
6.9 Rated temperature ............................................................................................................................................................................13
6.10 Acoustic noise level ..........................................................................................................................................................................13
6.11 Rated endurance .................................................................................................................................................................................13
6.12 Environmental requirements ..................................................................................................................................................14
7 Detail design requirements ...................................................................................................................................................................14
7.1 Dimensionally critical components ....................................................................................................................................14
7.2 Maintainability features ...............................................................................................................................................................14
7.3 Seals ...............................................................................................................................................................................................................14
7.4 Lubrication ..............................................................................................................................................................................................15
7.5 Balance ........................................................................................................................................................................................................15
7.6 Self-contained failure .....................................................................................................................................................................15
7.7 Safety wire sealing ............................................................................................................................................................................15
7.8 Electro-conductive bonding ......................................................................................................................................................15
7.9 Marking ......................................................................................................................................................................................................15
7.9.1 Nameplate ...........................................................................................................................................................................15
7.9.2 Fluid identification ......................................................................................................................................................16
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ISO 9206:2018(E)
7.9.3 Ports .........................................................................................................................................................................................16
8 Strength requirements ................................................................................................................................................................................16
8.1 General ........................................................................................................................................................................................................16
8.2 Proof pressure ......................................................................................................................................................................................16
8.2.1 Motor case ..........................................................................................................................................................................16
8.2.2 Motor inlet port .............................................................................................................................................................16
8.2.3 Motor outlet port ..........................................................................................................................................................16
8.3 Ultimate pressure ..............................................................................................................................................................................17
8.3.1 Motor case ..........................................................................................................................................................................17
8.3.2 Motor inlet port .............................................................................................................................................................17
8.3.3 Motor outlet port ..........................................................................................................................................................17
8.4 Pressure impulse (fatigue) ........................................................................................................................................................17
8.5 Port strength ..........................................................................................................................................................................................17
9 Construction requirements ....................................................................................................................................................................17
9.1 Materials ....................................................................................................................................................................................................17
9.1.1 General...................................................................................................................................................................................17
9.1.2 Metals .....................................................................................................................................................................................18
9.2 Corrosion protection .......................................................................................................................................................................18
9.2.1 General...................................................................................................................................................................................18
9.2.2 Ferrous and copper alloys ....................................................................................................................................18
9.2.3 Aluminium alloys ..........................................................................................................................................................19
9.3 Castings ......................................................................................................................................................................................................19
10 Installation requirements........................................................................................................................................................................19
10.1 Dimensions ..............................................................................................................................................................................................19
10.2 Mass ...............................................................................................................................................................................................................19
10.3 Mounting ...................................................................................................................................................................................................19
10.4 Orientation ..............................................................................................................................................................................................20
10.5 Coupling shaft .......................................................................................................................................................................................20
10.6 Ports ..............................................................................................................................................................................................................20
11 Maintenance requirements ....................................................................................................................................................................20
11.1 Maintenance concept ......................................................................................................................................................................20
11.2 Service life limitations and storage specifications ................................................................................................21
12 Reliability requirements ...........................................................................................................................................................................21
12.1 Equipment compliance .................................................................................................................................................................21
12.2 Requirements ........................................................................................................................................................................................21
13 Quality assurance provisions ...............................................................................................................................................................21
13.1 Responsibility for inspection ...................................................................................................................................................21
13.2 Classification of tests ......................................................................................................................................................................21
13.3 Test stand requirements ..............................................................................................................................................................21
14 Acceptance tests .................................................................................................................................................................................................22
14.1 General ........................................................................................................................................................................................................22
14.2 Examination of the product ......................................................................................................................................................22
14.3 Test programme ..................................................................................................................................................................................22
14.3.1 General...................................................................................................................................................................................22
14.3.2 External leakage requirements ........................................................................................................................23
14.3.3 Break-in run ......................................................................................................................................................................23
14.3.4 Proof pressure and overspeed tests .............................................................................................................23
14.3.5 Operational tests at rated conditions ..........................................................................................................24
14.3.6 Teardown inspection examination ................................................................................................................24
14.3.7 Run-in .....................................................................................................................................................................................24
14.3.8 Performance data .........................................................................................................................................................25
14.3.9 Fluid contamination test ........................................................................................................................................25
14.3.10 Electro-conductive bonding ................................................................................................................................26
14.4 Storage and packaging ...................................................................................................................................................................26
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ISO 9206:2018(E)
15 Qualification procedures ..........................................................................................................................................................................26
15.1 General ........................................................................................................................................................................................................26
15.2 Qualification procedure ................................................................................................................................................................26
15.2.1 Qualification by analogy .........................................................................................................................................26
15.2.2 Motor qualification test report .........................................................................................................................26
15.2.3 Samples and program of qualification tests ..........................................................................................27
15.3 Qualification testing ........................................................................................................................................................................27
15.3.1 Dimensional check ......................................................................................................................................................27
15.3.2 Expanded envelope acceptance tests ..........................................................................................................28
15.3.3 Overspeed test ................................................................................................................................................................28
15.3.4 Operational test at overpressure ....................................................................................................................28
15.3.5 Calibration ..........................................................................................................................................................................28
15.3.6 Endurance testing ........................................................................................................................................................29
15.3.7 Environmental tests ...................................................................................................................................................32
15.3.8 Structural tests ...............................................................................................................................................................33
15.3.9 Supplementary tests ..................................................................................................................................................35
Bibliography .............................................................................................................................................................................................................................36
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ISO 9206:2018(E)
Foreword
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 technical
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
electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/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 possibility 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 patent 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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 10, Aerospace fluid systems and components.This third edition of ISO 9206 cancels and replaces the second edition (ISO 9206:2016) which has been
technically revised.The main changes compared to the previous edition are as follows:
— title replaced “Constant displacement” with “Fixed displacement”;
— deletion of requirement for minimum case drain flow (6.3.2);
— update of external leakage requirements (6.3.4);
— correction of requirement for overspeed (6.4.1.2);
— coupling shaft requirements re-written (10.5);
— the test stand requirements have been revised (13.3);
— requirement to leave the case drain port unplugged in the Inlet port proof pressure test (14.3.4.3)
and the Case port proof pressure test (14.3.4.4);— update of test procedures in Operational tests at rated conditions (14.3.5);
— revision of the Sampling requirements (14.3.6.1);
— correction of flow measurement in Torque and flow rate (15.3.5.3);
— additional detail provided in the stalling torque and internal leakage test (15.3.5.7);
— endurance test representativity text added (15.3.6.1);— revision of Endurance test alternating loads test requirements (15.3.6.1 and 15.3.6.3);
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ISO 9206:2018(E)
— revision of filter used for endurance testing (15.3.6.6);
— revision of Recalibration requirements (15.3.6.9);
— correction of low-temperature test requirement (15.3.7.2);
— clarification of motor operation during vibration tests (15.3.8.1.4);
— clarification of resonant frequency vibration test (15.3.8.1.4);
— ports identified for the ultimate pressure test (15.3.8.5); and
— clarification of coupling shear test (15.3.8.6).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.© ISO 2018 – All rights reserved vii
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INTERNATIONAL STANDARD ISO 9206:2018(E)
Aerospace — Fixed displacement hydraulic motors —
General specifications
1 Scope
This document establishes the general requirements for constant displacement hydraulic motors,
suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi).
Primary and secondary function motors (see Clause 4) are covered in this document; however, actuators
with internal rotation angle limits and low-speed motors are not covered.This document is to be used in conjunction with the detail specification that is particular to each
application.2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the re...
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