ISO 18170:2017
Aerospace series — AC induction electric motor driven, variable delivery, hydraulic pumps — General requirements
ISO 18170:2017 establishes the general requirements for electric motor driven, variable delivery, hydraulic pumps suitable for use in aircraft hydraulic systems.
ISO 18170:2017 includes the general requirements for Alternating Current (AC) induction electric motor powered units. The AC power electrical power supply can be either controlled to provide a Constant Frequency (CF) or uncontrolled to provide a Variable Frequency (VF) AC supply to the electric motor.
ISO 18170:2017 is intended to be used in conjunction with the detail specification that is particular to each application.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Order of precedence
4.2 Electrical system characteristics
4.3 Hydraulic system characteristics
4.4 Airworthiness requirements
4.5 Qualification
5 Functional requirements
5.1 Functional requirements - electrical
5.1.1 AC power requirements
5.1.2 Electromagnetic interference
5.1.3 Electrical bonding
5.1.4 Protection requirements
5.1.5 Electric motor cooling methods
5.2 Functional requirements — Hydraulic
5.2.1 Hydraulic fluid
5.2.2 EMP pump pressure
5.2.3 Inlet pressure
5.2.4 Case drain pressures
5.2.5 Flows
5.2.6 EMP pump characteristics
5.2.7 Rated speed
5.2.8 Efficiency
5.2.9 Heat rejection
5.2.10 Variable delivery control
5.2.11 Rated temperature
5.2.12 Dry running
5.3 Functional requirements — EMP integrated assembly
5.3.1 Acoustic noise level
5.3.2 Endurance
5.4 Environmental requirements
6 Detailed design requirements
6.1 Dimensionally critical components
6.2 Maintainability features
6.3 Seals
6.4 Lubrication
6.5 Balance
6.6 Self-contained failure
6.7 Safety wire sealing
6.8 Electro-conductive bonding
6.9 Marking
6.9.1 Nameplate
6.9.2 Fluid identification
6.9.3 Ports
6.9.4 Direction of rotation
6.9.5 Electrical connection details
7 Strength requirements
7.1 General
7.2 Electric motor
7.2.1 Motor case
7.3 Hydraulic pump requirements
7.3.1 Pressure loads
7.3.2 Proof pressure
7.3.3 Ultimate pressure
7.3.4 Pressure impulse (fatigue)
7.3.5 Port strength
8 Construction
8.1 Materials
8.1.1 General
8.1.2 Metals
8.2 Corrosion protection
8.2.1 General
8.2.2 Ferrous and copper alloys
8.2.3 Aluminium alloys
8.3 Castings
9 Installation requirements
9.1 Dimensions
9.2 Mass
9.2.1 General
9.2.2 Centre of mass
9.3 Mounting
9.4 Orientation
9.5 Hydraulic ports
9.6 Electrical connections
10 Maintenance
10.1 Maintenance concept
10.2 Service life limitations and storage specifications
11 Reliability
11.1 Equipment compliance
11.2 Requirements
12 Quality assurance provisions
12.1 Responsibility for inspection
12.2 Classification of tests
12.3 Test stand requirements
12.3.1 General
12.3.2 Hydraulic requirements
12.3.3 Electrical requirements
13 Acceptance tests
13.1 General
13.2 Examination of the product
13.3 Test program
13.3.1 General
13.3.2 Electrical checks
13.3.3 Hydraulic checks
13.3.4 Break-in run
13.3.5 Proof pressure test
13.3.6 Load cycles
13.3.7 Tear-down inspection
13.3.8 Run-in
13.3.9 Functional tests
13.3.10 Pressure control test
13.3.11 Calibration
13.3.12 Efficiency check
13.3.13 Wear test
13.3.14 Electro-conductive bonding
13.3.15 Storage and packaging
14 Qualification tests
14.1 Purpose
14.2 Qualification procedure
14.2.1 Qualification by analogy
14.2.2 EMP qualification test report
14.2.3 Samples and program of qualification tests
14.2.4 Dimensional check
14.2.5 Expanded envelope acceptance tests
14.2.6 Proof pressure and load cycle tests
14.2.7 Calibration
14.2.8 Maximum pressure and response time tests
14.2.9 Heat rejection test
14.2.10 Loss of cooling
14.2.11 Electrical tests
14.2.12 Endurance test
14.2.13 Minimum inlet pressure test
14.2.14 Dry run test
14.2.15 Environmental tests
14.2.16 Structural tests
14.2.17 Explosion proof test
14.2.18 Short circuit test
14.2.19 Drive coupling shear test
14.2.20 Supplementary tests
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Order of precedence
4.2 Electrical system characteristics
4.3 Hydraulic system characteristics
4.4 Airworthiness requirements
4.5 Qualification
5 Functional requirements
5.1 Functional requirements - electrical
5.1.1 AC power requirements
5.1.2 Electromagnetic interference
5.1.3 Electrical bonding
5.1.4 Protection requirements
5.1.5 Electric motor cooling methods
5.2 Functional requirements — Hydraulic
5.2.1 Hydraulic fluid
5.2.2 EMP pump pressure
5.2.3 Inlet pressure
5.2.4 Case drain pressures
5.2.5 Flows
5.2.6 EMP pump characteristics
5.2.7 Rated speed
5.2.8 Efficiency
5.2.9 Heat rejection
5.2.10 Variable delivery control
5.2.11 Rated temperature
5.2.12 Dry running
5.3 Functional requirements — EMP integrated assembly
5.3.1 Acoustic noise level
5.3.2 Endurance
5.4 Environmental requirements
6 Detailed design requirements
6.1 Dimensionally critical components
6.2 Maintainability features
6.3 Seals
6.4 Lubrication
6.5 Balance
6.6 Self-contained failure
6.7 Safety wire sealing
6.8 Electro-conductive bonding
6.9 Marking
6.9.1 Nameplate
6.9.2 Fluid identification
6.9.3 Ports
6.9.4 Direction of rotation
6.9.5 Electrical connection details
7 Strength requirements
7.1 General
7.2 Electric motor
7.2.1 Motor case
7.3 Hydraulic pump requirements
7.3.1 Pressure loads
7.3.2 Proof pressure
7.3.3 Ultimate pressure
7.3.4 Pressure impulse (fatigue)
7.3.5 Port strength
8 Construction
8.1 Materials
8.1.1 General
8.1.2 Metals
8.2 Corrosion protection
8.2.1 General
8.2.2 Ferrous and copper alloys
8.2.3 Aluminium alloys
8.3 Castings
9 Installation requirements
9.1 Dimensions
9.2 Mass
9.2.1 General
9.2.2 Centre of mass
9.3 Mounting
9.4 Orientation
9.5 Hydraulic ports
9.6 Electrical connections
10 Maintenance
10.1 Maintenance concept
10.2 Service life limitations and storage specifications
11 Reliability
11.1 Equipment compliance
11.2 Requirements
12 Quality assurance provisions
12.1 Responsibility for inspection
12.2 Classification of tests
12.3 Test stand requirements
12.3.1 General
12.3.2 Hydraulic requirements
12.3.3 Electrical requirements
13 Acceptance tests
13.1 General
13.2 Examination of the product
13.3 Test program
13.3.1 General
13.3.2 Electrical checks
13.3.3 Hydraulic checks
13.3.4 Break-in run
13.3.5 Proof pressure test
13.3.6 Load cycles
13.3.7 Tear-down inspection
13.3.8 Run-in
13.3.9 Functional tests
13.3.10 Pressure control test
13.3.11 Calibration
13.3.12 Efficiency check
13.3.13 Wear test
13.3.14 Electro-conductive bonding
13.3.15 Storage and packaging
14 Qualification tests
14.1 Purpose
14.2 Qualification procedure
14.2.1 Qualification by analogy
14.2.2 EMP qualification test report
14.2.3 Samples and program of qualification tests
14.2.4 Dimensional check
14.2.5 Expanded envelope acceptance tests
14.2.6 Proof pressure and load cycle tests
14.2.7 Calibration
14.2.8 Maximum pressure and response time tests
14.2.9 Heat rejection test
14.2.10 Loss of cooling
14.2.11 Electrical tests
14.2.12 Endurance test
14.2.13 Minimum inlet pressure test
14.2.14 Dry run test
14.2.15 Environmental tests
14.2.16 Structural tests
14.2.17 Explosion proof test
14.2.18 Short circuit test
14.2.19 Drive coupling shear test
14.2.20 Supplementary tests
Bibliography