Caudal vertebra connecting structure for aeroengine

Abstract

The invention discloses a caudal vertebra connecting structure for an aeroengine, and relates to the technical field of design of caudal vertebra connecting structures in aircraft structures; the caudal vertebra connecting structure for the aeroengine is used for reducing the disturbance and the vibration of air currents in the caudal vertebra connecting place of the aeroengine; a connecting edge of a caudal vertebra connecting bracket and a mounting bracket are formed to an integrally molded structure; the connecting edge is fixedly connected to a mounting edge of an engine turbine back receiver through a first bolt; the mounting bracket and the connecting edge are spaced on the connecting edge; a self-locking nut is arranged at one end, far from the connecting edge, of the mounting bracket; a second bolt fits the self-locking nut to fixedly connect a caudal vertebra with the engine turbine back receiver; and after the second bolt is tightened, the top surface of the head of the second bolt and the surface of a runner of the caudal vertebra are positioned on one surface. The caudal vertebra connecting structure for the aeroengine, provided by the invention, reduces the disturbance generated by the flowing of the air currents through the caudal vertebra, is convenient for structure machining, and is free of interference in the assembly and decomposition process; and the structure resists high temperature, is excellent in rigidity and higher in practicability, can be repeatedly used, is high in device stability, and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of design of a tail cone connection structure in an aircraft structure, in particular to a tail cone connection structure for an aero-engine, which is used to reduce airflow disturbance and vibration at the connection of an aero-engine tail cone. Background technique [0002] The tail cone, nozzle and mixer of the aero-engine constitute the engine exhaust functional unit. The various components are connected in sequence. The traditional tail cone is directly connected to the rear casing of the engine turbine at the front end by bolts. However, since the rear end of the tail cone is approximately closed, the bolts used to connect the tail cone must be in the flow channel of the tail cone. Several empty grooves are opened in the circumferential direction on the surface to meet the assembly space required by the fixing bolts. The additional hollow grooves processed on the surface of the flow channel of the tai...

AI Technical Summary

Problems solved by technology

The additional hollow grooves processed on the surface of the flow channel of the tail cone to adapt to the assembly will directly cause a large disturbance when the airflow in the flow channel of the engine flows through the tail cone. The improvement of engine vibration, and the aggravation of vibration will lead to fatigue and fracture of the connecting parts fixing the tail vertebra, endangering the operation safety of the engine

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