clamshell thrust reverser

Abstract

A clamshell type reverse thrust device comprises a casing, a force bearing beam, a front force bearing pull rod, a rear force bearing pull rod, a reverse thrust door, a synchronization mechanism, a hydraulic distributing valve, a hydraulic actuating cylinder, an oil-supply oil-return system and an operating interlocking mechanism. The operating interlocking mechanism is composed of a linkage cam, a pulley, a support, a limiting block, a first rotating shaft, a poking rod, an operating cam, a converter, a first pull rod, a second pull rod, a second rotating shaft and a guide rail. When the reverse thrust door is opened by accident, the linkage cam moves backwards to touch a rocking arm of the operating cam, so that the operating cam rotates anticlockwise to drive an engine throttle lever to be converted to a small rotating speed state. When the reverse thrust door is blocked at some angle position due to faults, namely when the reverse thrust door cannot be completely opened or completely closed, the linkage cam limits a rotating angle of the operating cam through angular limiting of the rocking arm of the operating cam and the limiting block, and accordingly the engine throttle lever can be controlled to be operated within a small rotating speed range.

Description

technical field [0001] The invention relates to an aero-engine thrust reverser, in particular to a clamshell type thrust reverser. Background technique [0002] Common deceleration devices on aircraft are baffles and thrust reversers, but the efficiency of baffles is too low, so large and medium-sized aircraft generally use thrust reversers to decelerate. The characteristic of the clamshell thrust reverser is that the ratio of the generated reverse thrust to the maximum forward thrust is large (that is, the reverse thrust efficiency is high), and it is more suitable for engine deceleration with medium (small) bypass ratio and medium thrust, but the existing Due to structural problems of the thrust reverser, when the reverse thrust door is accidentally opened, or the reverse thrust door is stuck due to failure, it is difficult to switch the engine throttle to the minimum reverse thrust speed, or control the engine throttle lever to operate within a small speed range, so it is...

AI Technical Summary

Problems solved by technology

[0002] Common deceleration devices on aircraft are baffles and thrust reversers, but the efficiency of baffles is too low, so large and medium-sized aircraft generally use thrust reversers to decelerate

The characteristic of the clamshell thrust reverser is that the ratio of the generated reverse thrust to the maximum forward thrust is large (that is, the reverse thrust efficiency is high), and it is more suitable for engine deceleration with medium (small) bypass ratio and medium thrust. Due to structural problems of the thrust reverser, when the reverse thrust door is accidentally opened, or the reverse thrust door is stuck due to failure, it is difficult to switch the engine throttle to the minimum reverse thrust speed, or control the engine throttle lever to operate within a small speed range, so it is easy to flight accident

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