A spring-driven sealing mechanism for aircraft hardpoints

Abstract

The invention discloses an aircraft hardpoint sealing mechanism driven by springs. The aircraft hardpoint sealing mechanism comprises a casing (1), wherein a positioning ring (11) vertically extends upwards from the upper top surface of the casing (1), two sealing plates (5) which can be mutually connected in an abutting manner, springs (6) for driving the sealing plates (5) to close and handles (8) through which the sealing plates (5) can be opened are arranged in the positioning ring (11), and a lower hole (10) corresponding to the sealing plates (5) is formed in the middle part of the casing (1); a cover plate (4) is fixed on the positioning ring (11), and an upper hole (12) corresponding to the lower hole (10) is formed in the cover plate (4). The aircraft hardpoint sealing mechanism disclosed by the invention is simple in structure andconvenient to use, after the aircraft hardpoint sealing mechanism is closed, the casing and the sealing plates are completely flush with the outer surface of an aircraft and not protruded out of the surface of the aircraft completely, and aerodynamic performances of the aircraft are not influenced.

Description

technical field [0001] The invention relates to the field of aircraft structure design, in particular to a spring-driven sealing mechanism for an aircraft external hardpoint. Background technique [0002] In order to increase the range and ammunition load of modern stealth aircraft, and increase the flexibility of carrying ammunition and combat missions, it is necessary to use external hardpoints under the wings or fuselage to carry various ammunition, pods, and auxiliary fuel tanks. In the process of performing combat missions, in order to ensure maneuverability and stealth performance, before entering the theater, the auxiliary fuel tank needs to be thrown away together with the pylon. In addition, after the aircraft has launched the external ammunition, it is also necessary to throw away the pylon to reduce the radar reflection area of ​​the aircraft and restore a clean aerodynamic shape. In order to install the pylon, an opening is left in the skin at the external hardp...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that after the pylon is thrown away, there is no flap to seal the opening in the skin at the hardpoint, which is detrimental to the stealth performance of the aircraft

Invention patent 201410279843.X introduces a sealing mechanism driven by a compression spring. This solution relies on the dead point of the four-bar mechanism to realize automatic closing, but the opening position is too close to the dead point, and it is easy to cause a failure that the sealing plate cannot be closed.

In addition, the sealing mechanism described in this invention protrudes from the surface of the aircraft, which will damage the aircraft's aerodynamic and stealth appearance to a certain extent

Images