ISO/TC 20/SC 10/WG 9 - Hydraulic power and actuation equipment

This document establishes the general requirements for variable displacement uni-directional and bi-directional hydraulic motors, suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi). These requirements include: — design requirements; — test requirements. 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 intended to be used in conjunction with the detail specification that is particular to each application.

This document establishes the general requirements for a linear hydraulic utility actuator, herein referred to as a "utility actuator", for use in flight vehicle hydraulic systems at pressures up to 35 000 kPa (5 000 psi). These requirements include: — design requirements; — test requirements. This document is intended to be used in conjunction with the detail specification that is particular to each application. NOTE Although Brake pistons and Landing Gear Bogie (Truck) Pitch Trimmers are utility actuators, they are outside the scope of this document. This is because these devices are considered to be specialist actuator devices due to their specific duty cycles requiring a separate set of tailored requirements.

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.

ISO 8625-1:2018 defines general terms relating to pressure in fluid systems used in aerospace construction.

ISO 8625-2:2018 defines general terms relating to flow in fluid systems used in aerospace construction.

ISO 8625-3:2018 defines general terms relating to temperature in fluid systems used in aerospace construction.

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.

ISO 8278:2016 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). It is to be used in conjunction with detail specifications that is particular to each application.

ISO 5859:2014 establishes a system of graphic symbols of hydraulic and pneumatic circuits and components for all types of aerospace systems.

ISO 8625-4:2011 defines general terms relating to control/actuation systems in the field of aerospace fluid systems and components.

ISO 22072:2011 defines the general characteristics, requirements and design data to be included in the procurement technical specification of an electrohydrostatic actuator (EHA) to be used to power aircraft control surfaces or other moving parts of an aerospace vehicle. This type of actuator is an alternative to the hydraulically powered servo-control actuators that are currently used. It is intended that ISO 22072:2011 cover the unique requirements of EHAs.

ISO 22089:2009 establishes the general requirements for hydraulic Power Transfer Units (PTUs) ISO 22089:2009 covers uni-directional and bi-directional PTUs. ISO 22089:2009 is used in conjunction with the detail specification particular to each application.

ISO 6771:2007 specifies the pressure classes and temperature types for the basic systems and component systems that are commonly used in aerospace fluid systems. Classes and types in the lower ranges represent systems in common use. Those in the higher ranges represent systems that are in less common use or that are used in developmental systems.

ISO 9206:2016 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 are covered in ISO 9206:2016; however, actuators with internal rotation angle limits and low-speed motors are not covered. ISO 9206:2016 is to be used in conjunction with the detail specification that is particular to each application.

Gives 55 terms including their alphabetical index in English and French as well as a graphical presentation of an arbitrary pressure curve in annex A.

Specifies 15 terms and definitions in English and French. Contains the alphabetical indexes in English and French.

Specifies 18 terms and definitions in English and French. Contains the alphabetical indexes in English and French.

Establishes informations for motors to be installed in aircraft, which transform hydraulic power into mechanical energy in the form of a rotational torque. Primary and secondary function motors are covered. Actuators with internal rotation angle limits and low-speed motors are not covered. Shall be used in conjunction with the detail specification particular to each application.

Establishes a scheme for the marking, so that the correct type of fluid is readily apparent during any assembly or testing operations in workshops. The marking is not intended to serve any purpose when a component is installed in an aircraft. Describes the scheme, materials, design and manufacture and gives preferred dimensions of identifications plates.

Shall be used in conjunction with detail specifications concerning each pump model. Includes functional requirements, quality assurance provisions, qualification tests, acceptance tests, storage and packaging. A schematic summary is provided in the annex for easy reference to the contents of this International Standard.