Adjustable jet pipe structure

Abstract

The invention belongs to the technical field of jet pipe structure design, and particularly relates to an adjustable jet pipe structure. The adjustable jet pipe structure comprises a jet pipe connecting cylinder, an adjusting sheet and actuating cylinders; the outer wall of the jet pipe connecting cylinder is provided with a reverse thrust exhaust port, the reverse thrust exhaust port is inclined towards the inlet end of the jet pipe connecting cylinder, and the adjusting sheet is arranged at the outlet end of the jet pipe connecting cylinder and is in sliding connection with the jet pipe connecting cylinder; the actuating cylinders are hinged between the jet pipe connecting cylinder and the adjusting sheet so as to drive the adjusting sheet to slide relative to the jet pipe connecting cylinder, and then the actuating cylinders have a forward thrust state and a reverse thrust state; in the forward thrust state, the adjusting sheet moves to slide relative to the jet pipe connecting cylinder, the effective area for shielding the outlet end of the jet pipe connecting cylinder is gradually reduced, the effective area for shielding the reverse thrust exhaust port is gradually increased, and finally, the effective area of the reverse thrust exhaust port can be completely shielded; and in the reverse thrust state, the adjusting sheet moves to slide relative to the jet pipe connecting cylinder, the effective area for shielding the reverse thrust exhaust port is gradually reduced, the effective area for shielding the outlet end of the jet pipe connecting cylinder is gradually increased, and finally, the effective area of the outlet end of the jet pipe connecting cylinder can be completely shielded.

Description

technical field [0001] The application belongs to the technical field of nozzle structure design, and in particular relates to an adjustable nozzle structure. Background technique [0002] The outlet area of ​​the nozzle of the aero-engine is mostly designed according to the set design point. The outlet area of ​​the nozzle of the aero-engine designed by this design method is fixed and cannot be adjusted, and has the following defects: [0003] 1) Due to the deviation between theory and reality, and the inevitable introduction of errors in machining and assembly, the working state of the aero-engine will deviate from the set design point to a certain extent, making it difficult to achieve the best efficiency; [0004] 2) There are many situations in the working process of the aero-engine. When the deviation from the set design point is large, the work efficiency is low. [0005] In addition, most of the existing nozzles do not have the reverse thrust function, which cannot ...

AI Technical Summary

Problems solved by technology

[0003] 1) Due to the deviation between theory and reality, as well as the inevitable introduction of errors in machining and assembly, the working state of the aero-engine will deviate from the set design point to a certain extent, making it difficult to achieve the best efficiency;

[0004] 2) There are many situations in the working process of the aero-engine, and when the deviation from the set design point is large, the work efficiency is low

[0005] In addition, most of the existing nozzles do not have the reverse thrust function, which cannot make the aircraft achieve rapid deceleration and braking.

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