Helicopter air inlet channel structure capable of being turned over

Abstract

The invention provides a turnable helicopter air inlet channel structure, and belongs to the technical field of helicopter structural design, the structure comprises a front support frame, a rear support frame, a left fixed cover, a right fixed cover, a movable cover, a lower air inlet channel, an air inlet channel support assembly and an air inlet net assembly, the air inlet channel is divided into an upper part and a lower part, wherein the upper air inlet channel is integrated on the movable cover, the upper section and the lower section are pressed and sealed through the P-type sealing ring, the air inlet net assembly is connected to the movable cover in a screwed mode, and the left side of the movable cover is connected with the left fixed cover; the right side of the movable cover is connected with the right fixed cover through a front hinge assembly and a rear hinge assembly. The front and the back of the movable cover are connected with the front support frame and the back support frame; the interior of the front side of the movable cover is connected with the front supporting frame; the air inlet channel supporting assembly, the lower air inlet channel, the front supporting frame, the rear supporting frame, the left fixing cover and the right fixing cover are riveted to form a stable frame structure. The device is simple in structure, convenient to mount and maintain, reasonable in stress form, safe, reliable and capable of solving the problems of maintainability and safety of the rear cabin engine of the power cabin.

Description

Technical Field

[0001] The invention belongs to the technical field of helicopter structure design, and in particular relates to an openable helicopter air inlet structure. Background Art

[0002] Large helicopters often use three engines. Generally, two engines are arranged in the front cabin of the power compartment and one engine is arranged in the rear cabin. The engine arranged in the rear cabin of the power compartment will be affected by the exhaust of the engine in the front cabin. Generally, the height of the rear cabin is raised and the air is taken above the rear cabin to reduce the adverse effect of the high temperature exhaust of the front engine.

[0003] At present, helicopters with a three-engine layout often use an integral fixed inlet structure for the engine air intake arranged in the rear cabin. Since this air intake method requires the air to be directed from the vertical heading to the heading direction, the shape of the air intake will have a 90-degree turn, so the air intake will be relatively long and have a sharp turn. After each flight, maintenance personnel must observe and clean the engine blades and other internal components through the air intake. Therefore, when maintaining the rear cabin engine, maintenance personnel need to lie on the rear engine air intake or even use their heads or half of their bodies to drill into the air intake to maintain the internal blades and other parts of the rear cabin engine. Maintenance is very inconvenient, maintenance personnel are prone to accidents, and the rear engine air intake and related structures are easily damaged. At the same time, the helicopter rear cabin engine air intake usually adopts an open structure, and the air intake is easy to enter foreign objects such as branches and sand and gravel when the helicopter takes off and lands. At the same time, when flying in a low-temperature environment, the air intake lip is easy to freeze, and there is a risk of falling into the air intake and damaging the engine. Summary of the invention

[0004] In order to solve the problem of difficulty in maintaining the rear cabin engine and the safety problem, the present invention provides a flip-up helicopter air intake structure, which divides the rear engine air intake into two sections, the upper air intake can be opened upward and fixed by a mechanical strut, and the lower air intake is fixed by an air intake support assembly. After opening the upper air intake, maintenance personnel can easily and conveniently maintain the rear cabin engine through the lower air intake. After closing the upper air intake, it is fixed by a quick release lock and a latch lock. The upper and lower sections are compressed and sealed by a P-type sealing ring, and the maintainability is significantly improved. At the same time, an air intake net assembly is installed on the outer side of the air inlet of the upper air intake, which improves the reliability and safety of the engine. The technical scheme is as follows:

[0005] Provided is a flippable helicopter air intake structure, comprising: a front support frame 1, a rear support frame 2, a left fixed cover 3, a right fixed cover 4, a movable cover 5, a lower air intake duct 6, an air intake duct support assembly 7, and an air intake net assembly 8. The air intake duct of this configuration is divided into upper and lower parts, wherein the upper air intake duct is integrated on the movable cover 5, the upper and lower sections are compressed and sealed by a P-type sealing ring 16, the air intake net assembly 8 is screwed on the movable cover 5, the left side of the movable cover 5 is connected to the left fixed cover 3; the right side of the movable cover 5 is connected to the right fixed cover 4 by a front hinge assembly 12 and a rear hinge assembly 13; the front and rear of the movable cover 5 are connected to the front support frame 1 and the rear support frame 2; the front side of the movable cover 5 is connected to the front support frame 1;

[0006] The air inlet duct support assembly 7, the lower air inlet duct 6, the front support frame 1, the rear support frame 2, the left fixed cover 3 and the right fixed cover 4 are riveted together to form a stable frame structure, which can directly support the movable cover 5 on the one hand, and support the lower air inlet duct 6 through the air inlet duct support assembly 7 on the other hand.

[0007] Optionally, the P-type sealing ring 16 is installed on the movable cover 5 through the edge pressure strip 17 and the bolt assembly 18 , and the installation of the P-type sealing ring 16 can be adjusted by adjusting the gasket 19 .

[0008] Optionally, the movable cover 5 is connected to the left fixed cover 3 via a quick-release lock 11 .

[0009] Optionally, the front and rear of the movable cover 5 are connected to the front support frame 1 and the rear support frame 2 respectively through latch locks 14.

[0010] Optionally, the front interior of the movable cover 5 is connected to the front support frame 1 via a mechanical support rod 9 .

[0011] Optionally, a handle 10 is installed on the left side of the movable cover 5 to facilitate opening and closing the movable cover 5.

[0012] Optionally, the quick-release lock 11 and the latch lock 14 are opened, and the movable cover 5 can be opened from left to right, and after being fully opened, it can be fixed by the mechanical support rod 9 inside the movable cover 5.

[0013] Furthermore, a drain nozzle 15 is arranged below the lower air inlet duct 6 to facilitate drainage on rainy days and prevent rainwater from entering the air inlet duct.

[0014] Optionally, the air inlet support assembly 7 is composed of a plurality of support tubes and a plurality of joints cross-connected to each other;

[0015] Some of the joints are evenly arranged around the upper flange of the lower air inlet 6, and the other joints are respectively arranged on the front support frame 1, the rear support frame 2, the left fixed cover 3 and the left fixed cover 4. All support pipes are located between the joints around the upper flange of the air inlet 6 and the joints on the frame, and the two ends are connected and fixed by bolts. The support structure has a reasonable layout, strong bearing capacity and light weight.

[0016] Optionally, the height of the lower air inlet 6 is 600mm to 800mm. When the maintenance personnel maintain the rear cabin engine, they open the movable cover 5 to expose the lower air inlet 6. Since the height of the lower air inlet 6 is relatively low, the rear cabin engine can be maintained very conveniently through the lower air inlet 6. Since the supporting structure of the edge of the lower air inlet 6 is reasonable, it can meet the load requirements generated by the maintenance personnel during operation, thereby ensuring that the structural strength meets the use requirements and improving safety and reliability.

[0017] The beneficial effects of the present invention are at least:

[0018] The invention discloses a helicopter air inlet structure which can be opened, has a simple structure, is easy to install and maintain, has a reasonable force form, is safe and reliable, and can solve the maintainability and safety problems existing in the engine in the rear compartment of the power compartment.

[0019] At present, the air intake structure has been applied to a certain type of aircraft and has achieved good results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a front left axle side view (opened state) of the flip-up air intake structure of the present invention.

[0021] Figure 2 The figure is a front left axle side view of the flip-up air intake structure of the present invention.

[0022] Figure 3 The figure is a rear right axle side view of the flippable air intake structure of the present invention.

[0023] Figure 4 It is a front left axle side view of the fixed air inlet and the supporting assembly in the flip-up air inlet structure of the present invention.

[0024] Figure 5 It is a longitudinal cross-sectional view of the openable air intake structure of the present invention.

[0025] Figure 6 This is a detailed view of the connection between the upper and lower air inlets of the flippable air inlet structure of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below through specific implementation modes and drawings.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The present invention discloses a flip-up helicopter air inlet structure, which mainly comprises a front support frame 1, a rear support frame 2, a left fixed cover 3, a right fixed cover 4, a movable cover 5, a lower air inlet 6, an air inlet support assembly 7 and an air inlet net assembly 8.

[0028] The air intake duct of this configuration is divided into two parts, wherein the upper air intake duct is integrated on the movable cover 5, and the upper and lower sections are compressed and sealed by a P-type sealing ring 16. The P-type sealing ring 16 is installed on the movable cover 5 by means of a pressure strip 17 and a bolt assembly 18, and the installation of the P-type sealing ring 16 can be adjusted by adjusting the gasket 19.

[0029] The engine air intake mesh assembly 8 is screwed onto the movable cover 5, which is connected to the left fixed cover 3 via four quick-release locks 11, and to the right fixed cover 4 via a front hinge assembly 12 and a rear hinge assembly 13. The front and rear are connected to the front and rear support frames via a latch lock 14 respectively, and a handle 10 is installed on the left side for convenient opening and closing of the movable cover 5. By opening the quick-release lock 11 and the latch lock 14, the movable cover 5 can be opened from left to right, and can be fixed by a mechanical strut 9 after being opened.

[0030] In one embodiment, a drain nozzle 15 is arranged below the lower air inlet duct 6 to facilitate drainage on rainy days and prevent rainwater from entering the air inlet duct.

[0031] In the present invention, the air inlet duct support assembly 7, the front support frame 1, the rear support frame 2, the left fixed cover 3 and the right fixed cover 4 are riveted together to form a stable frame structure. On the one hand, the movable cover 5 can be directly supported, and on the other hand, the lower air inlet duct 6 can be supported through the air inlet duct support assembly 7.

[0032] See also Figure 4 The air inlet duct support assembly 7 is mainly composed of 9 support tubes and 10 joints which are cross-connected with each other, 5 of which are evenly arranged around the circumference of the upper flange of the lower air inlet duct 6, and the other 5 joints are respectively arranged on the front and rear support frames and the left and right fixed covers. The support structure has a reasonable layout, strong bearing capacity and light weight.

[0033] When the maintenance personnel maintain the rear cabin engine, they open the movable cover 5 to expose the lower air inlet 6. Since the lower air inlet 6 is at a relatively low height, the rear cabin engine can be maintained very conveniently through the lower air inlet 6. Since the support structure at the edge of the lower air inlet 6 is reasonable, it can meet the load requirements generated by the maintenance personnel during operation, ensuring that the structural strength meets the use requirements and improving safety and reliability.

[0034] The advantages of the present invention are as follows:

[0035] 1) The upper and lower air inlets are sealed and connected by P-type sealing rings, and have a certain degree of adjustability, which is convenient for installation;

[0036] 2) The movable cover is connected by quick-release locks, latch locks and hinges, and is equipped with a handle on the outside and a mechanical support rod on the inside, which is convenient for opening and closing and maintenance, and the connection is safe and reliable;

[0037] 3) The installation space of the lower air intake is very limited. Through the structural layout of the tube beam with multiple points of support, the force form is reasonable, which can save space and weight while meeting the load-bearing requirements;

[0038] 4) The engine air intake is equipped with an air intake mesh assembly, which can not only prevent foreign matter from directly entering the engine, but also has a certain anti-icing function for the air intake duct. It also has a bypass design, which greatly improves the safety of the engine operation.

[0039] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional technologies.

Claims

1. A retractable helicopter air inlet structure, characterized in that: include: A front support frame (1), a rear support frame (2), a left fixed cover (3), a right fixed cover (4), a movable cover (5), a lower air inlet duct (6), an air inlet duct support assembly (7), and an air inlet net assembly (8). The air inlet duct of this configuration is divided into an upper and lower part, wherein the upper air inlet duct is integrated on the movable cover (5), and the upper and lower sections are compressed and sealed by a P-type sealing ring (16). The air inlet net assembly (8) is screwed on the movable cover (5). The left side of the movable cover (5) is connected to the left fixed cover (3); the right side of the movable cover (5) is connected to the right fixed cover (4) by a front hinge assembly (12) and a rear hinge assembly (13); the front and rear of the movable cover (5) are connected to the front support frame (1) and the rear support frame (2); the front inner part of the movable cover (5) is connected to the front support frame (1); The air inlet duct support assembly (7), the lower air inlet duct (6), the front support frame (1), the rear support frame (2), the left fixed cover (3) and the right fixed cover (4) are connected to form a stable frame structure.

2. The helicopter air inlet structure according to claim 1, characterized in that: The P-type sealing ring (16) is installed on the movable cover (5) through a pressure strip (17) and a bolt assembly (18), and the installation of the P-type sealing ring (16) can be adjusted by adjusting a gasket (19).

3. The helicopter air inlet structure according to claim 1, characterized in that: The movable cover (5) is connected to the left fixed cover (3) via a quick release lock (11).

4. The helicopter air inlet structure according to claim 1, characterized in that: The front and rear of the movable cover (5) are respectively connected to the front support frame (1) and the rear support frame (2) through latch locks (14).

5. The helicopter air inlet structure according to claim 1, characterized in that: The interior of the front side of the movable cover (5) is connected to the front support frame (1) via a mechanical support rod (9).

6. The helicopter air inlet structure according to claim 1, characterized in that: A handle (10) is installed on the left side of the movable cover (5).

7. The helicopter air inlet structure according to claim 1, characterized in that: The quick release lock (11) and the latch lock (14) are opened, and the movable cover (5) can be opened from left to right, and after being fully opened, it can be fixed by the mechanical support rod (9) inside the movable cover (5).

8. The helicopter air inlet structure according to claim 1, characterized in that: A water leaking nozzle (15) is arranged below the lower air inlet duct (6).

9. The helicopter air inlet structure according to claim 1, characterized in that: The air inlet duct support assembly (7) is composed of a plurality of support pipes and a plurality of joints cross-connected with each other; Some of the joints are evenly arranged around the circumference of the upper flange of the lower air inlet duct (6), and the other joints are respectively arranged on the front support frame (1), the rear support frame (2), the left fixed cover (3) and the left fixed cover (4). All support pipes are located between the joints around the circumference of the upper flange of the air inlet duct (6) and the joints on the frame, and the two ends are connected and fixed by bolts.

10. The helicopter air inlet structure according to claim 1, characterized in that: The height of the lower air inlet (6) is 600 mm to 800 mm.

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