Thrust Reverser Actuation With Volumetric Flow Divider Synchronization
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Solution Overview
Problem
Existing thrust reverser systems for aircraft turbojet engines rely on complex and heavy mechanical synchronization systems, which complicate installation and increase weight, while also requiring precise synchronization accuracy.
Innovation Solution
The introduction of an electro-hydrostatic actuation system that replaces mechanical synchronization with a volumetric flow divider, ensuring precise and equitable fluid distribution to actuators, thereby synchronizing their movement without the need for mechanical gears and joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical synchronization systems are used to coordinate actuator movement, then synchronization accuracy can be achieved, but system weight and complexity increase significantly
Solution Approach 1:
The patent replaces the mechanical synchronization system (gears, joints, and linkages) with an electro-hydrostatic actuation system that uses electric motors and hydraulic pistons. Each actuator is independently controlled by a control unit that receives synchronization signals, eliminating the need for mechanical coupling while maintaining precise synchronization through electronic control
Solution Approach 2:
The patent introduces a control unit as an intermediary between the synchronization signal source and the actuators. This control unit processes synchronization signals and coordinates the operation of multiple actuators independently, replacing the direct mechanical coupling with an intelligent control intermediary that achieves synchronization through electronic coordination
2Ease of operation
If mechanical synchronization systems with gears and joints are implemented, then actuator coordination is achieved, but installation complexity and weight increase
Solution Approach 1:
The patent eliminates heavy mechanical components such as gears, joints, and linkages by replacing them with electro-hydrostatic actuators that use electric motors and hydraulic pistons. This substitution dramatically reduces system weight while simplifying installation, as the actuators can be independently mounted and controlled without complex mechanical interconnections
Solution Approach 2:
The patent divides the thrust reverser system into independent actuator modules, each with its own motor and piston. This segmentation allows each module to be installed and adjusted independently, eliminating the need for complex mechanical synchronization and significantly reducing overall system weight while improving installation ease
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the installation process, reduces system weight, and achieves precise synchronization of actuators, enhancing the safety and performance of the thrust reverser system while being independent of the aircraft's hydraulic circuit.
Implementation Method 1
an electro-hydrostatic actuation system comprising a motor pump
Implementation Method 2
a volumetric flow divider having an inlet connected to the motor pump and at least two outlets, each connected to an actuator, the volumetric flow divider being configured to receive a fluid and to supply the actuators with a fluid substantially equitably in flow rate
Data Source
AI summary
A thrust reverser device for an aircraft turbojet engine nacelle an electro-hydrostatic actuation system that includes a motor pump and a first actuation assembly. The first actuation assembly includes a series of at least two actuators configured to be attached to a movable cover of the thrust reverser and to move the movable cover or covers between a retracted position and a deployed position relative to the nacelle. The first electro-hydraulic actuation system further includes a volumetric flow divider with an inlet connected to the motor pump and at least two outlets, wherein each outlet is connected to an actuator. The volumetric flow divider is configured to receive a fluid and to supply the fluid to the actuators with an equal flow rate.