Hanging structure between aeroengine and external accessory gearbox

Abstract

This application discloses a hanging structure between an aeroengine and an external accessory gearbox, which belongs to the technical field of hanging system design for the aeroengine. The hanging structure between the aero-engine and the external accessory gearbox comprises an upper lifting lug (13), which is fixedly connected with the accessory gearbox (11) and designed with a through hole; a pin shaft (15) of the lifting lug, wherein one end of the shaft is fixedly arranged in the through hole of the upper lifting lug (13) and the other end is rotationally connected with a lower lifting lug (17); the lower lifting lug (17), which is fixedly connected with an installation edge (1) of the engine. One end of the pin shaft of the hanging structure is arranged to match with a joint bearing,which can meet the requirement of relative position compensation between the engine and the accessory gearbox. Only one set of the joint bearing structures reduce the number of degrees of freedom ofthe hanging structure, thereby reducing the stir quantity of the engine along the axis direction. The other end of the pin shaft of the lifting lug is connected with the upper lifting lug through a longer matching surface, thereby ensuring the connective stability and reliability of the hanging structure.

Description

technical field [0001] The application belongs to the technical field of aero-engine suspension system design, and in particular relates to a suspension structure between an aero-engine and an external accessory case. Background technique [0002] The aeroengine is the heart of the aircraft, its working conditions are complicated and its reliability is high. The accessory casing is one of the important components of the aero-engine. It is responsible for driving and installing various engine accessories and flying accessories. It is the medium through which the engine accessories and aircraft accessories obtain power from the engine main shaft. The accessory casing is generally installed on the outside of the engine, and there are a series of transmission gears (shafts) inside the casing, and the engine and the accessory casing are connected by a suspension structure. Therefore, the stability and reliability of the suspension structure affect the overall operation safety of...

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Problems solved by technology

[0004] In the existing scheme, the engine can generate a certain amount of rotational movement around the axis of the engine, which is used to realize the position compensation between the engine and the accessory casing during installation and relative movement; due to the action of the joint bearing, the engine will also generate Directional play (the axial play mentioned in this application refers to the play caused by the swing of the engine around the direction perpendicular to the axis of the engine). The existing scheme uses two joint bearings to make the engine move in the direction of its axis ( The direction perpendicular to the paper surface) has a large degree of freedom, so its movement is large

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