Helicopter air supply duct

Abstract

The utility model relates to the field of helicopter air supply equipment, in particular to a helicopter air supply duct which comprises a hollow air duct body, one end of the air duct body is provided with an air duct air inlet used for being connected with an air outlet of a helicopter fan, and the other end of the air duct body is blocked. An air outlet is formed in the air duct body, a hollow inner air duct is fixedly arranged in the air duct body, a fan air supply outlet is formed in the inner air duct, the fan air supply outlet and the air duct air inlet are sealed and fixedly connected, and an airflow outlet is formed in the position, corresponding to the air outlet, of the inner air duct. The airflow outlet is connected with the air outlet through an airflow channel; the air duct is simple in structure, and the air interlayer used for heat preservation and heat insulation is arranged between the air duct body and the inner air duct, so that the heat preservation and heat insulation purposes can be achieved without using Fores sponge.

Description

Technical Field

[0001] The utility model relates to the field of helicopter air supply equipment, in particular to a helicopter air supply duct. Background Art

[0002] At present, helicopter air ducts are all made of aluminum alloy, and the outer layer of the duct is wrapped with Armaflex sponge for heat insulation to avoid condensation caused by low duct surface temperature when delivering cold air, or scalding surrounding personnel due to high surface temperature when delivering hot air. After using Armaflex sponge to protect the air duct, during transportation and installation, the Armaflex sponge wrapped on the surface is easily scratched by other sharp objects around, resulting in reduced insulation effect and Armaflex sponge falling off. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a helicopter air supply duct which can effectively reduce the external dimensions of the air supply duct and avoid the reduction of heat insulation capacity due to the damage of the Armaflex sponge during transportation and installation.

[0004] The utility model discloses a helicopter air supply duct, comprising a hollow duct body, one end of which is provided with an air duct inlet for connecting with a helicopter fan outlet, the other end of which is provided with a blocking arrangement, an air outlet is provided on the duct body, a hollow inner duct is fixedly provided in the duct body, a fan air supply outlet is provided on the inner duct, the fan air supply outlet is sealed and fixedly connected with the duct inlet, an air flow outlet is provided at a position corresponding to the air flow outlet on the inner duct, and the air flow outlet is connected with the air outlet through an air flow channel;

[0005] A one-way valve is provided at the air outlet of the fan;

[0006] An air interlayer for heat preservation and insulation is arranged between the air duct body and the inner air duct.

[0007] Preferably, the air duct body comprises an outer shell and a top cover, which are fixedly connected to form a hollow air duct body with a rectangular cross-section, and the inner air duct is fixedly connected to the outer shell by a plurality of studs arranged on the side of the outer shell corresponding to the top cover.

[0008] Preferably, the one-way valve comprises a one-way valve that is sealed at the air outlet of the fan, the one-way valve is connected to the air duct body via a connecting seat, and the one-way valve is hinged to the connecting seat via an intermediate connecting piece.

[0009] Preferably, the air inlet of the air duct is a circular interface.

[0010] Preferably, one end of the air duct body where the air duct air inlet is arranged is also blocked, and the air duct air inlet is arranged on the peripheral surface of the air duct body.

[0011] Or preferably, the helicopter air supply duct comprises a head end duct unit and a terminal duct unit;

[0012] The ends of the head end air duct unit and the tail end air duct unit that are away from each other are both sealed.

[0013] The head end air duct unit and the terminal end air duct unit are connected in a nested and sealed manner via a connecting port arranged on the ends of the head end air duct unit and the terminal end air duct unit facing each other.

[0014] Preferably, it also includes a plurality of intermediate air duct units, and adjacent intermediate air duct units are connected in a nested and sealed manner via a connecting port arranged on one end where the adjacent intermediate air ducts are connected to each other to form an intermediate air duct, and the two ends of the intermediate air duct are respectively connected in a nested and sealed manner via a connecting port arranged on one end where the intermediate air duct is connected to the head end air duct unit or the terminal air duct unit.

[0015] Preferably, the outer shell and the top cover extend axially out of the inner air duct along the helicopter air supply duct to form the connecting port;

[0016] When two interconnected air duct units are connected, the connection port of the front air duct unit extends into the connection port of the rear air duct unit and is sleeved on the inner air duct of the rear air duct unit, and the inner air ducts of the two air duct units abut against each other.

[0017] Preferably, the one-way valve includes a gate-type valve core that is sealed at the air supply outlet of the fan, the shape of the valve core matches the shape of the air supply outlet of the fan, a connecting piece is fixedly connected to the gate-type valve core, the connecting piece is hinged to the connecting seat through a rotating shaft, and a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is against the connecting seat, and the other end is against the connecting piece.

[0018] The utility model has a simple structure and utilizes an air interlayer for heat preservation and heat insulation between the air duct body and the inner air duct, so that the purpose of heat preservation and heat insulation can be achieved without using Armaflex sponge.

[0019] The utility model can effectively reduce the external dimensions of the air supply duct; avoid the reduction of heat insulation capacity due to the breakage of the Armoire sponge during transportation and installation; or avoid unknown risks caused by the Armoire sponge falling off and adhering to nearby equipment.

[0020] The utility model has a much longer lifespan than the Armaflex sponge and has better corrosion resistance and aging resistance. It is more convenient to clean during daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of an embodiment of the utility model.

[0023] Figure 3 Schematic diagram of the connection between two adjacent air duct units.

[0024] Figure 4 This is a schematic diagram of the one-way valve installation.

[0025] Figure 5 It is a schematic diagram of the one-way valve structure.

[0026] Figure numerals: 1-housing, 2-top cover, 3-inner air duct, 4-stud, 5-air outlet, 6-air duct inlet, 7-connecting port, 8-check valve, 9-rotating shaft, 10-torsion spring, 11-valve core, 12-connecting piece, 13-connecting seat. DETAILED DESCRIPTION

[0027] The utility model discloses a helicopter air supply duct, comprising a hollow duct body, one end of which is provided with an air duct inlet 6 for connecting with a helicopter fan air outlet 5, the other end of which is provided with a blocking arrangement, the air duct body is provided with an air outlet 5, a hollow inner duct 3 is fixedly provided in the duct body, a fan air supply port is provided on the inner duct 3, the fan air supply port is sealed and fixedly connected with the duct inlet 6, an air flow outlet is provided at a position corresponding to the air outlet 5 on the inner duct 3, and the air flow outlet is connected with the air outlet 5 through an air flow channel;

[0028] A one-way valve 8 is provided at the air outlet of the fan to prevent moist air or salt mist from entering the interior of the device when not in use, thereby causing mold or corrosion of the device.

[0029] An air interlayer for heat preservation and insulation is arranged between the air duct body and the inner air duct 3 .

[0030] The air duct body includes an outer shell 1 and a top cover 2, which are fixedly connected to form a hollow air duct body with a rectangular cross-section. The inner air duct 3 is fixedly connected to the outer shell 1 via a plurality of studs 4 arranged on the side of the outer shell 1 corresponding to the top cover 2.

[0031] The one-way valve 8 includes a one-way valve door 8 that is sealed at the air outlet of the fan. The one-way valve door 8 is connected to the air duct body through a connecting seat 13 , and the one-way valve door 8 is hinged to the connecting seat 13 through an intermediate connecting piece 12 .

[0032] The one-way valve 8 includes a gate-type valve core 11 which is sealed at the air outlet of the fan. The shape of the valve core 11 matches the shape of the air outlet of the fan. A connecting piece 12 is fixedly connected to the gate-type valve core 11. The connecting piece 12 is hinged to a connecting seat 13 through a rotating shaft 9, and a torsion spring 10 is sleeved on the rotating shaft 9. One end of the torsion spring 10 abuts against the connecting seat 13, and the other end abuts against the connecting piece 12. Under the action of the torsion spring 10, the gate-type valve core 11 is sealed at the air outlet of the fan.

[0033] The air duct air inlet 6 is a circular interface.

[0034] One end of the air duct body where the air duct air inlet 6 is arranged is also blocked, and the air duct air inlet 6 is arranged on the peripheral surface of the air duct body.

[0035] In one embodiment, the helicopter air supply duct comprises a head end duct unit and a terminal duct unit;

[0036] The ends of the head end air duct unit and the tail end air duct unit that are away from each other are both sealed.

[0037] The head end air duct unit and the terminal air duct unit are connected in a nested and sealed manner via a connection port 7 provided on the ends of the head end air duct unit and the terminal air duct unit facing each other. Figure 2 shown.

[0038] In one embodiment, it also includes a plurality of intermediate air duct units, and adjacent intermediate air duct units are nested and sealedly connected via a connecting port 7 provided on one end where the adjacent intermediate air ducts are connected to each other to form an intermediate air duct, and the two ends of the intermediate air duct are respectively nested and sealedly connected via a connecting port 7 provided on one end where the intermediate air duct is connected to the head end air duct unit or the terminal air duct unit.

[0039] The outer shell 1 and the top cover 2 extend axially along the helicopter air supply duct to the inner duct 3 to form the connection port 7;

[0040] When two interconnected air duct units are connected, the connection port 7 of the front air duct unit extends into the connection port 7 of the rear air duct unit and is sleeved on the inner air duct 3 of the rear air duct unit, and the inner air ducts 3 of the two air duct units are against each other. Figure 3 shown.

[0041] The outer shell 1 and top cover 2 of the air supply duct are both made of composite materials, which can be carbon fiber materials. Armaflex sponge is no longer used, avoiding other unknown risks caused by the breakage and shedding of Armaflex sponge. The outer shell 1 made of composite materials has a longer service life, better environmental adaptability, and is easy to clean and maintain.

[0042] According to the thermal conductivity of air is 0.023W / m·k, the thermal conductivity of the first-grade Armaflex sponge is 0.04 W / m·k. Without considering the aging, shedding and damage after long-term use, the heat insulation capacity of air with the same thickness is about 1.7 times. The original air duct of the helicopter is generally wrapped with 9m of insulation material. When this air duct structure is used on the aircraft, without changing the outer dimensions, the air interlayer of the same thickness is used to replace the insulation material, and the heat insulation effect of the air duct is better. When the air environment temperature is 30℃ and the humidity is 95%, the surface temperature of the air duct outer shell 1 can still be effectively controlled to prevent the condensation water droplets on the surface of the air duct outer shell 1 from falling to the surrounding equipment due to the low surface temperature of the air duct outer shell 1, affecting the mission execution of the helicopter.

[0043] For the convenience of transportation and installation, the air duct is generally designed to be between 1000mm and 1500mm in length, and each section is provided with an air outlet 5 as required. When a longer air duct is required, the air duct is designed into multiple sections according to actual use needs, and the two sections are connected by an extended docking interface to achieve nested docking of the air ducts at both ends.

[0044] The air inlet 6 of the air duct is a circular interface, which is convenient for docking with various air duct pipelines, and a one-way valve 8 is set at the air inlet of the air duct to prevent moist air or salt mist from entering the interior of the device when not in use, causing mold or corrosion of the device.

[0045] For the convenience of transportation and installation, the air duct is generally designed to be between 1000mm and 1500mm in length. Each section of the air duct is provided with an air outlet 5 as required. When a longer air duct is required, the air duct body is designed to be multi-sectioned according to actual use needs, and two adjacent air duct units are nested and connected through a connection port 7.

[0046] The utility model has the advantages of simple and reliable structure, strong aging resistance and corrosion resistance, good heat preservation and thermal insulation effects, and is convenient for transportation, cleaning and maintenance.

[0047] It has been applied in a certain type of helicopter air supply duct, with good results, effectively improving the performance of the air supply duct.

Claims

1. A helicopter air supply duct, comprising a hollow duct body, one end of which is provided with an air duct inlet for connecting to an air outlet of a helicopter fan, the other end of which is sealed, and an air outlet is provided on the duct body, characterized in that: A hollow inner air duct is fixedly arranged in the air duct body, a fan air supply port is arranged on the inner air duct, the fan air supply port is sealed and fixedly connected to the air inlet of the air duct, an air flow outlet is arranged at a position corresponding to the air outlet on the inner air duct, and the air flow outlet is connected to the air outlet through an air flow channel; A one-way valve is provided at the air outlet of the fan; An air interlayer for heat preservation and insulation is arranged between the air duct body and the inner air duct.

2. A helicopter air supply duct as claimed in claim 1, characterized in that: The air duct body comprises an outer shell and a top cover, which are fixedly connected to form a hollow air duct body with a rectangular cross section, and the inner air duct is fixedly connected to the outer shell via a plurality of studs arranged on the side of the outer shell corresponding to the top cover.

3. A helicopter air supply duct as claimed in claim 1, characterized in that: The one-way valve comprises a one-way valve that is sealed at the air outlet of the fan, the one-way valve is connected to the air duct body through a connecting seat, and the one-way valve is hinged to the connecting seat through an intermediate connecting piece.

4. A helicopter air supply duct as claimed in claim 1, characterized in that: The air inlet of the air duct is a circular interface.

5. A helicopter air supply duct as claimed in claim 1, characterized in that: One end of the air duct body where the air duct air inlet is arranged is also blocked, and the air duct air inlet is arranged on the peripheral surface of the air duct body.

6. A helicopter air supply duct as claimed in claim 2, characterized in that: The helicopter air supply duct includes a head end duct unit and a terminal duct unit; The ends of the head end air duct unit and the terminal end air duct unit that are away from each other are both sealed; The head end air duct unit and the terminal end air duct unit are connected in a nested and sealed manner via a connecting port arranged on the ends of the head end air duct unit and the terminal end air duct unit facing each other.

7. A helicopter air supply duct as claimed in claim 6, characterized in that: It also includes a plurality of intermediate air duct units, wherein adjacent intermediate air duct units are connected in a nested and sealed manner via connection ports arranged on one end where the adjacent intermediate air ducts are connected to each other to form an intermediate air duct, and the two ends of the intermediate air duct are respectively connected in a nested and sealed manner via connection ports arranged on one end where the intermediate air duct is connected to the head end air duct unit or the terminal air duct unit.

8. A helicopter air supply duct as claimed in claim 7, characterized in that: The outer shell and the top cover extend axially out of the helicopter air supply duct into the inner duct to form the connecting port; When two interconnected air duct units are connected, the connection port of the front air duct unit extends into the connection port of the rear air duct unit and is sleeved on the inner air duct of the rear air duct unit, and the inner air ducts of the two air duct units abut against each other.

9. A helicopter air supply duct as claimed in claim 3, characterized in that: The one-way valve includes a gate-type valve core that is sealed at the air supply port of the fan. The shape of the valve core matches the shape of the air supply port of the fan. A connecting piece is fixedly connected to the gate-type valve core. The connecting piece is hinged to a connecting seat through a rotating shaft, and a torsion spring is sleeved on the rotating shaft. One end of the torsion spring is against the connecting seat, and the other end is against the connecting piece.

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