An emergency exit sealing structure for an aircraft cockpit

Abstract

An emergency exit sealing structure for an aircraft cockpit includes a canopy and a frame. The canopy has a recessed step around its perimeter, and the surface of the step is a continuous outer skin. An annular gas-tight strip is provided on the lower surface of the step, and an annular water-tight strip is provided on the side wall of the step. The frame has a raised edge that corresponds to the recessed step around the canopy. The water-tight strip seals the gap between the front end of the raised edge and the side wall of the canopy step, and the gas-tight strip seals the gap between the lower surface of the raised edge and the upper surface of the canopy step.

Description

Technical Field

[0001] This application relates to the field of aircraft design, and in particular to an emergency exit sealing structure for an aircraft cockpit. Background Technology

[0002] The emergency exits in the aircraft cockpit are located on the top of the cockpit and are equipped with canopies. These canopies can only be opened from the inside of the cabin and cannot be opened from the outside. Under normal circumstances, crew members can pull the inner handle on the canopy inside the cockpit to move the latch out of the latch seat hole, thereby opening and removing the canopy at the emergency exit to enable emergency escape.

[0003] Under normal circumstances, aircraft doors are located on the side of the fuselage. The airtightness of the fuselage is ensured by the compression or inflation of the airtight seal between the door and the fuselage. The watertightness is ensured by the "L"-shaped water collection groove on the upper part of the door frame. The length of the water collection groove is 10 to 15 mm longer than the door. Rainwater at the door flows away through the water collection groove.

[0004] Since the emergency hatches of existing aircraft are plug-in structures located on the top of the fuselage, the hatches must ensure both airtightness and watertightness. Watertightness cannot be guaranteed by installing water collection tanks on the top of the aircraft. Therefore, it is essential to design a sealing structure for the hatches that can guarantee both airtightness and watertightness. Summary of the Invention

[0005] To address the problems existing in the prior art, this application designs an emergency exit sealing structure for aircraft cockpits to solve the sealing problem of the hatch.

[0006] An emergency exit sealing structure for an aircraft cockpit includes a canopy and a frame. The canopy has a recessed step around its perimeter, the surface of which is a continuous outer skin. An annular gas-tight strip is provided on the lower surface of the step, and an annular water-tight strip is provided on the sidewall of the step. The frame has a raised edge corresponding to the recessed step around the canopy. The water-tight strip seals the gap between the front end of the raised edge and the sidewall of the canopy step, and the gas-tight strip seals the gap between the lower surface of the raised edge and the upper surface of the canopy step.

[0007] The water seal strip has a curved teardrop-shaped sandwich structure in cross section. The upper sandwich layer of the water seal strip is horizontally fixed to the upper surface of the recessed step around the hatch cover and connected to the outer skin of the hatch cover. The lower sandwich layer of the water seal strip contains sponge rubber, and the lower end of the water seal strip is attached to the side wall of the recessed step around the hatch cover.

[0008] The gas seal strip has an Ω-shaped cross-section, and the lower end of the gas seal strip is embedded in a U-shaped pressure ring. The bottom of the U-shaped pressure ring is fixed to the lower surface of the recessed step around the hatch cover.

[0009] The front end of the protruding edge of the mouth frame is a T-shaped flange with an arc-shaped chamfer at the front end. The arc-shaped chamfer of the T-shaped flange is in sealing contact with the water seal strip. A rubber plate is provided on the lower surface of the protruding edge of the mouth frame. The rubber plate can be pressed against the upper end of the air seal strip, and the rubber plate is in sealing contact with the air seal strip.

[0010] The beneficial effects of this application are as follows: after the hatch is closed in place, the water seal strip contacts the edge strip of the hatch opening frame, providing a watertight seal for the hatch; the air seal strip contacts the rubber plate at the hatch opening frame, and through the compression of the air seal strip, it provides an airtight seal for the hatch. The sealing structure of this application is simple, reliable, and has good sealing performance.

[0011] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments: Attached Figure Description

[0012] Figure 1 This is a schematic diagram showing the connection between the emergency exit door and the frame of the aircraft cockpit.

[0013] Figure 2 for Figure 1 The AA-direction cross section is a schematic diagram of the emergency exit sealing structure of the aircraft cockpit.

[0014] The numbers in the diagram are explained as follows: 1. Hatch cover, 2. Hatch frame, 3. Outer skin, 4. Water seal strip, 5. Gas seal strip, 6. U-shaped pressure ring, 7. T-shaped flange strip, 8. Rubber plate. Detailed Implementation

[0015] Referring to the attached drawings, the emergency exit sealing structure of the aircraft cockpit of this application includes a canopy 1 and an opening frame 2. The periphery of the canopy 1 is a recessed step, the surface of which is a continuous outer skin 3. An annular gas seal strip 5 is provided on the lower surface of the step, and an annular water seal strip 4 is provided on the side wall of the step. The opening frame 2 is provided with a raised edge, which corresponds to the recessed step around the canopy. The water seal strip 4 seals the gap between the front end of the raised edge and the side wall of the canopy step, and the gas seal strip 5 seals the gap between the lower surface of the raised edge and the upper surface of the canopy step.

[0016] In practice, the cross-section of the water seal strip 4 is a flexible teardrop-shaped sandwich structure. The upper sandwich of the water seal strip 4 is horizontally fixed to the upper surface of the recessed step around the hatch cover 1 and connected to the outer skin 3 of the hatch cover 1. The lower sandwich of the water seal strip 4 contains sponge rubber, and the lower end of the water seal strip 4 is attached to the side wall of the recessed step around the hatch cover.

[0017] In practice, the gas seal strip 5 has an Ω-shaped cross-section, and the lower end of the gas seal strip 5 is embedded in a U-shaped pressure ring 6. The bottom of the U-shaped pressure ring 6 is fixed to the lower surface of the recessed step around the hatch cover.

[0018] In practice, the front end of the protruding edge of the frame 2 is a T-shaped flange 7. The front end of the T-shaped flange 7 has an arc-shaped chamfer. The arc-shaped chamfer of the T-shaped flange 7 is in sealing contact with the water seal strip 4. A rubber plate 8 is provided on the lower surface of the protruding edge of the frame 2. The rubber plate 8 can be pressed onto the upper end of the air seal strip 5, and the rubber plate 8 is in sealing contact with the air seal strip 5.

[0019] In practice, the outer skin 2 of the canopy 1 and the longitudinal and transverse bulkheads are all made of aluminum alloy sheets and are connected by rivet connectors to form a box-shaped structure that bears airtight loads and aircraft aerodynamic loads.

[0020] The water seal strip 4 has a teardrop-shaped sandwich structure with a sponge rubber core and an outer surface wrapped with an adhesive cloth. The outer surface of the adhesive cloth is then coated with an anti-aging liquid. The water seal strip 4 is glued to the outer skin 3 of the hatch cover 1 and adheres to the upper surface and side wall of the recessed steps around the hatch cover 1.

[0021] Both the opening frame 2 and the raised edge are made of aluminum alloy sheet, which strengthens the opening and withstands airtight loads and aircraft aerodynamic loads. The raised edge of the opening frame 2 is inserted into one groove of the T-shaped flange 7, and a rubber sheet 8 is bonded to the other groove of the T-shaped flange 7. The rubber sheet 8 and the airtight seal 5 together ensure the airtightness of the hatch 1.

[0022] After the hatch is closed, the water seal strip 4 comes into contact with the edge strip 7 of the hatch opening frame, which provides a water seal for the hatch. The air seal strip 5 comes into contact with the rubber plate 8 at the hatch opening frame. The rubber plate 8 compresses the air seal strip 5, which provides an air seal for the hatch.

Claims

1. An emergency exit sealing structure for an aircraft cockpit, comprising a hatch and a frame, characterized in that, The hatch cover has a recessed step around its perimeter, with a continuous outer skin on the surface of the step. An annular airtight strip is provided on the lower surface of the step, and an annular watertight strip is provided on the side wall of the step. The frame has a raised edge that corresponds to the recessed step around the hatch cover. The watertight strip seals the gap between the front end of the raised edge and the side wall of the hatch cover step, and the airtight strip seals the gap between the lower surface of the raised edge and the upper surface of the hatch cover step. The watertight strip has a curved teardrop-shaped sandwich structure in cross-section. The upper sandwich of the watertight strip is horizontally fixed to the upper surface of the recessed step around the hatch cover and connected to the outer skin of the hatch cover. The lower sandwich of the watertight strip contains sponge rubber, and the lower end of the watertight strip is attached to the side wall of the recessed step around the hatch cover.

2. The aircraft cockpit emergency exit sealing structure as described in claim 1, characterized in that, The gas seal strip has an Ω-shaped cross-section, and the lower end of the gas seal strip is embedded in a U-shaped pressure ring. The bottom of the U-shaped pressure ring is fixed to the lower surface of the recessed step around the hatch cover.

3. The aircraft cockpit emergency exit sealing structure as described in claim 1, characterized in that, The front end of the protruding edge of the mouth frame is a T-shaped flange with an arc-shaped chamfer at the front end. The arc-shaped chamfer of the T-shaped flange is in sealing contact with the water seal strip. A rubber plate is provided on the lower surface of the protruding edge of the mouth frame. The rubber plate can be pressed against the upper end of the air seal strip, and the rubber plate is in sealing contact with the air seal strip.

Images