Engine air inlet protection system with sand prevention function

Abstract

The utility model discloses an engine air inlet protection system with a sand prevention function, which comprises a sand prevention panel component in a flat plate shape and a vortex tube component, a plurality of vortex tubes are mounted on the flat-plate-shaped sand prevention panel component, air inlets of the vortex tubes face the outer side of the sand prevention panel component, air outlets of the vortex tubes face the inner side of the sand prevention panel component, and the vortex tubes are arranged on the vortex tube component. The sand prevention panel assembly is installed on the sand discharging channel assembly, holes are formed in the side face of the sand discharging channel assembly, air with sand and dust can enter the sand discharging channel assembly from the sand prevention panel assembly through the holes, and the sand discharging fan assembly is installed on the sand discharging channel assembly. When an engine works, a valve of the sand discharging fan is opened, air with impurities (sand dust) enters from an air inlet of the vortex tube, after sand is discharged through the vortex tube, a large amount of sand dust is discharged out of the engine through the sand discharging fan, clean air is discharged from an air outlet of the vortex tube and then flows into an air inlet channel of the engine, and air is provided for safe operation of the engine.

Description

Technical Field

[0001] The utility model relates to the field of helicopter engines, and particularly relates to an engine air intake protection system with a sand prevention function. Background Art

[0002] A helicopter engine is generally equipped with an air intake system. The existing engine air intake system is not equipped with a sand prevention device. When the helicopter takes off, lands or flies in a sandy environment, it is very likely to inhale a large amount of sand and dust into the engine system, resulting in engine damage and affecting the safe flight of the aircraft.

[0003] Therefore, an engine air intake protection system with a sand prevention function is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an engine air intake protection system with a sand prevention function. The engine air intake protection system can provide sufficient clean air for the engine in a sandy environment, meet the air volume requirement during the safe operation of the engine, and ensure the safe takeoff, landing and flight of the helicopter in a sandy environment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions. An engine air intake protection system with a sand prevention function includes:

[0006] A sand prevention panel assembly, which is in a flat plate shape;

[0007] A vortex tube assembly. A plurality of vortex tubes are installed on the flat sand prevention panel assembly. The air inlet of the vortex tube faces the outside of the sand prevention panel assembly, and the air outlet of the vortex tube faces the inside of the sand prevention panel assembly;

[0008] A sand discharge channel assembly. The sand prevention panel assembly is installed on the sand discharge channel assembly. A hole is drilled on the side of the sand discharge channel assembly, and the air with sand and dust can enter the sand discharge channel assembly from the sand prevention panel assembly through this hole;

[0009] A sand discharge fan assembly, which is installed on the sand discharge channel assembly and controls whether the air inlet is communicated with the outside;

[0010] A bird strike protection structure, which is installed with the sand discharge channel assembly and the sand prevention panel assembly for bird strike protection;

[0011] A seal, which is installed on the sand discharge channel assembly (3) for sealing between the sand prevention device, the engine air intake duct and the outside.

[0012] As a further description of the above technical solution: The sand control panel assembly includes a front sand control panel assembly, an upper sand control panel assembly, an inner sand control panel assembly, and an outer sand control panel assembly. Each side sand control panel assembly includes an outer panel and an inner panel. The outer panel is spaced outside the inner panel. The air inlet of the vortex tube assembly is connected to the outer panel, and the air outlet of the vortex tube assembly is connected to the inner panel. The outer panel and the inner panel form a first flow space, and the sand discharge hole of the vortex tube assembly is located in the first flow space.

[0013] As a further description of the above technical solution: A reinforcing beam is further provided on the sand control panel assembly, and it is installed between the outer panel and the inner panel.

[0014] As a further description of the above technical solution: Sand discharge channels are provided on the inner sides of the sand control panel assemblies. The sand discharge channels are all perforated to communicate with the first flow space and discharge the sand and dust in the first flow space.

[0015] As a further description of the above technical solution: The sand discharge fan assembly is installed on the sand discharge channel assembly to discharge the sand and dust inside the sand discharge channel assembly.

[0016] As a further description of the above technical solution: The vortex tube assembly includes an upstream tube and a downstream tube. The inside of the upstream tube is a spiral blade structure radially distributed. The high-speed moving air flow enters the spiral structure of the upstream tube to generate high-speed rotation. Under the action of centrifugal force, the sand and dust in the high-speed air flow move along the tube wall and are separated from the clean air when passing through the downstream tube and enter the sand discharge channel.

[0017] As a further description of the above technical solution: The sand discharge fan assembly includes a sand discharge fan, two one-way valves, hinges, and springs. The hinge shaft end is connected to the sand discharge fan, and the hinge flat end is connected to the one-way valve through a spring. The spring is used as a drive to realize the automatic closing of the one-way valve.

[0018] As a further description of the above technical solution: The bird strike protection structure is simultaneously connected to the sand control panel assembly and the sand discharge channel assembly for bird strike protection.

[0019] As a further description of the above technical solution: The seal is installed on the sand discharge channel assembly to prevent external air from directly entering the engine air intake duct without passing through the sand control device.

[0020] The utility model has the following beneficial effects:

[0021] Compared with the prior art, when the aircraft takes off, lands and flies under sandy dust conditions, the sand discharge fan valve of the engine air intake protection system with a sand prevention function opens, and the air with impurities (sandy dust) enters from the air inlet of the vortex tube. After the sandy dust is discharged through the vortex tube, a large amount of sandy dust is discharged outside the aircraft through the sand discharge fan, and the clean air is discharged from the exhaust port of the vortex tube and then flows into the engine air intake duct to provide air for the safe operation of the engine.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments;

[0024] Figure 1 is a schematic structural diagram of the air intake protection system provided by the present invention Figure 1 ;

[0025] Figure 2 is a schematic structural diagram of the air intake protection system provided by the present invention Figure 2 .

[0026] LEGEND DESCRIPTION:

[0027] 1. Sand prevention panel assembly; 11. Outer panel; 12. Inner panel; 2. Vortex tube assembly; 3. Sand discharge channel assembly; 4. Sand discharge fan assembly; 41. Hinge; 42. Valve; 5. Bird strike protection structure; 6. Seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0029] As Figure 1 , 2 shown, the engine air intake protection system includes a sand prevention panel assembly 1, a vortex tube assembly 2, a sand discharge channel assembly 3, a sand discharge fan assembly 4, a bird strike protection structure 5 and a seal 6. A plurality of vortex tubes 2 are installed on the sand prevention panel assembly 1. The air inlet of the vortex tube 2 is arranged towards the outside of the panel assembly 1, and the exhaust port of the vortex tube 2 is arranged towards the inside of the panel assembly 1.

[0030] Specifically, the panel assembly 1 includes an outer panel 11 and an inner panel 12. The outer panel 11 is disposed at an interval outside the inner panel 12. The air inlet of the vortex tube 2 is fixedly connected to the outer panel 11 in a sealed manner, and specifically, it can be connected by welding. The outer panel 11 and the inner panel 12 form a first flow space, and the sand discharge hole of the vortex tube 2 is located in the first flow space. Preferably, the panel assembly 1 further includes a reinforcing beam, which is disposed between the outer panel 11 and the inner panel 12 and is fixedly connected to the outer panel 11 and the inner panel 12. Since the surface areas of the outer panel 11 and the inner panel 12 are relatively large, the reinforcing beam mainly serves to support the outer panel 11 and the inner panel 12.

[0031] The vortex tube assembly 2 includes an upstream tube and a downstream tube. The interior of the upstream tube is a spiral blade structure radially distributed. The high-speed moving air flow enters the spiral structure of the upstream tube to generate high-speed rotation. Under the action of centrifugal force, the sand and dust in the high-speed air flow move along the tube wall and are separated from the clean air when passing through the downstream tube, then enter the sand discharge channel, and the clean air enters the engine air intake passage to provide air for the operation of the engine.

[0032] A sand discharge channel assembly 3 is provided at the bottom of the outer panel 11. The sand discharge channel assembly 3 is connected to the first flow space through the sand discharge hole to discharge the sand and dust in the first flow space. A sand discharge fan assembly 4 is provided on the sand discharge channel assembly 3, and the sand and dust in the sand discharge channel assembly can be discharged through the sand discharge fan.

[0033] Working principle: When the aircraft takes off, lands and flies under sand and dust conditions, the sand discharge fan starts and the valve opens. The air with impurities (sand and dust) enters from the air inlet of the vortex tube. The high-speed moving air flow enters the spiral structure of the upstream tube to generate high-speed rotation. Under the action of centrifugal force, the sand and dust in the high-speed air flow move along the tube wall and are separated from the clean air when passing through the downstream tube. After the sand is discharged through the vortex tube, the sand discharge fan discharges the sand and dust outside the aircraft, and the clean air is discharged from the exhaust port of the vortex tube and then flows into the engine air intake passage to provide air for the safe operation of the engine.

[0034] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art in the said technical field.

Claims

1. An engine intake protection system with a sand prevention function, characterized in that, Comprising: A sand control panel assembly (1), which is in a flat plate shape; A vortex tube assembly (2), on the flat sand control panel assembly (1), a number of vortex tubes are installed, the inlet of the vortex tube faces the outside of the sand control panel assembly (1), and the outlet of the vortex tube faces the inside of the sand control panel assembly (1); A sand discharge channel assembly (3), the sand control panel assembly (1) is installed on the sand discharge channel assembly (3), holes are drilled on the side of the sand discharge channel assembly (3), and the air with sand and dust can enter the sand discharge channel assembly (3) from the sand control panel assembly (1) through this; A sand discharge fan assembly (4), which is installed on the sand discharge channel assembly (3) and controls whether the air inlet is communicated with the outside; A bird strike protection structure (5), which is installed with the sand discharge channel assembly (3) and the sand control panel assembly (1) for bird strike protection; A seal (6), which is installed on the sand discharge channel assembly (3) for sealing between the sand control device and the engine air intake and the outside.

2. The engine air intake protection system with a sand prevention function according to claim 1, characterized in that, The sand control panel assembly (1) includes a front sand control panel assembly, an upper sand control panel assembly, an inner sand control panel assembly and an outer sand control panel assembly. Each side sand control panel assembly includes an outer panel (11) and an inner panel (12). The outer panel (11) is spaced outside the inner panel (12). The inlet of the vortex tube assembly (2) is connected to the outer panel (11), and the exhaust port of the vortex tube assembly (2) is connected to the inner panel (12). The outer panel (11) and the inner panel (12) form a first flow space, and the sand discharge holes of the vortex tube assembly (2) are located in the first flow space.

3. The engine air intake protection system with a sand prevention function according to claim 2, characterized in that A reinforcing beam is further provided on the sand control panel assembly (1), and it is installed between the outer panel and the inner panel.

4. The engine intake air protection system with a sand prevention function according to claim 1, characterized in that, Sand discharge channels are provided on the inner side of the sand control panel assembly (1), and the sand discharge channels are all drilled for communicating the first flow space and discharging the sand and dust in the first flow space.

5. The engine intake air protection system with a sand prevention function according to claim 1, characterized in that, The sand discharge fan assembly (4) is installed on the sand discharge channel assembly (3) for discharging the sand and dust inside the sand discharge channel assembly (3).

6. The engine intake air protection system with a sand prevention function according to claim 1, characterized in that, The vortex tube assembly (2) includes an upstream tube and a downstream tube. The inside of the upstream tube is a spiral blade structure evenly distributed in the radial direction. The high-speed moving air enters the spiral structure of the upstream tube to generate high-speed rotation. Under the action of centrifugal force, the sand and dust in the high-speed air move along the pipe wall and are separated from the clean air when passing through the downstream tube and enter the sand discharge channel.

7. An engine intake air protection system with a sand prevention function according to claim 1, characterized in that, The sand discharge fan assembly (4) includes a sand discharge fan, two one-way valves (42), a hinge and a spring. The hinge shaft end is connected to the sand discharge fan, and the hinge plane end is connected to the one-way valve (42) through the spring. The spring is used as a drive to realize the automatic closing of the one-way valve (42).

8. The engine intake air protection system with a sand prevention function according to claim 1, characterized in that, The bird strike protection structure (5) is connected to both the sand control panel assembly (1) and the sand discharge channel assembly (3) at the same time.

9. The engine intake air protection system with a sand prevention function according to claim 1, characterized in that, The seal (6) is installed on the sand discharge channel assembly (3) to prevent the outside air from directly entering the engine air intake without passing through the sand control device.

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