Ice-proof variable pipe diameter sand dust separation module

Abstract

The application provides an ice-preventing variable-diameter sand-dust separation module, which comprises an ice-preventing structure 2, a module frame 3 and a vortex pipe array 4, the ice-preventing structure 2 comprises an ice-preventing curved surface 201 and side plates 202, wherein the module frame 3 is a cavity structure, the upper end of the module frame 3 is open, the ice-preventing structure 2 is arranged on the module frame 3, the vortex pipe array 4 is arranged in the vertical direction in the module frame 3, and the vortex pipe array 4 comprises N vortex pipes; the ice-preventing curved surface 201 is a curved surface structure with a smooth curvature shape, the projection of the ice-preventing curved surface 201 completely covers the vortex pipe array 4 directly above, the projection area of the ice-preventing curved surface 201 is the same as the inlet plane area of the vortex pipe array 4; the two sides of the ice-preventing curved surface 201 are respectively provided with the side plates 202; one side of the ice-preventing curved surface 201 is arranged at the back side of the upper end of the module frame 3, and the horizontal right-angle sides of the two side plates 202 are respectively arranged at the two side edges of the upper end of the module frame 3.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromechanics, in particular to an ice-proof variable-pipe-diameter sand-dust separation module. BACKGROUND

[0002] As an important aerial platform, helicopters need to hover, take off and land near the ground frequently. If foreign matters such as sand, dust, rain and snow in the environment enter the engine through the air intake, it will inevitably pose a great threat to the safe operation of the engine, thereby endangering flight safety. Therefore, in order to ensure the flight safety and performance of helicopters, existing helicopters are generally equipped with sand-proof devices and ice-proof devices.

[0003] The most widely used sand-proof device for helicopter air intake is a multi-pipe sand-proof device, the core unit of which is a vortex tube. Sand and dust particles move along the tube wall in the vortex tube under the action of centrifugal force, and finally enter the sand discharge chamber through the passage between the upstream pipe and the downstream pipe of the vortex tube and are discharged outside the machine. The sand-proof panel forms the functional unit of the sand-proof device by integrating a large number of vortex tubes, and the functional units are connected by reasonable sand discharge channels to form the final sand-proof device. At present, the vortex tubes used in the sand-proof device of a helicopter are all of the same specification and design point, and can only have high separation efficiency for sand and dust within a specified particle size range. SUMMARY

[0004] The present application provides an ice-proof variable-pipe-diameter sand-dust separation module, which can handle sand and dust of different particle sizes at the same time.

[0005] Technical solution: An ice-proof variable-pipe-diameter sand-dust separation module, which comprises an ice-proof structure 2, a module frame 3 and a vortex tube array 4. The ice-proof structure 2 comprises an ice-proof curved surface 201 and side plates 202, wherein:

[0006] The module frame 3 is a hollow structure, the upper end of the module frame 3 is open, the ice-proof structure 2 is arranged on the module frame 3, and the vortex tube array 4 is arranged in the module frame 3 along the vertical direction. The vortex tube array 4 comprises N vortex tubes.

[0007] The ice-proof curved surface 201 is a curved surface structure with a smooth curvature, the projection of the ice-proof curved surface 201 completely covers the vortex tube array 4 directly above, the projection area of the ice-proof curved surface 201 is the same as the inlet plane area of the vortex tube array 4, the two sides of the ice-proof curved surface 201 are respectively provided with the side plates 202, one side of the ice-proof curved surface 201 is arranged at the rear side of the upper end of the module frame 3, and the horizontal direction right angle sides of the two side plates 202 are arranged at the two side edges of the upper end of the module frame 3, the upper edge of the ice-proof curved surface 201, the vertical direction right angle sides of the two side plates 202 and the front edge of the upper end of the module frame 3 form an air inlet.

[0008] Specifically, the air inlet area of the anti-icing structure 2 is equal to the sum of the inlet cross-sectional areas of the N vortex tubes of the vortex tube array 4.

[0009] Specifically, the diameter of each vortex tube of the vortex tube array 4 near the air inlet of the anti-icing structure 2 is greater than the diameter of the vortex tube away from the air inlet of the anti-icing structure.

[0010] Specifically, the diameter of each vortex tube of the vortex tube array 4 at the same distance from the air inlet of the anti-icing structure 2 is the same.

[0011] Specifically, the air inlet of the anti-icing structure 2 is arranged to face away from the incoming flow direction.

[0012] Specifically, the number N of vortex tubes of the vortex tube array 4 ranges from 20 to 50.

[0013] Specifically, the anti-icing curved surface 201 is smoothly transitioned.

[0014] Specifically, the diameter of the vortex tube of the vortex tube array 4 ranges from 17 to 38 mm.

[0015] In summary, the present application provides a variable-diameter sand dust separation module that can prevent icing, which can simultaneously process sand dust of different particle sizes, solving the shortcomings of existing sand prevention devices, such as being limited by sand dust particle size and low efficiency. At the same time, an anti-icing structure is adopted for the vortex tube air inlet, which can effectively reduce the incoming flow water droplet collection coefficient and prevent the vortex tube air inlet from being blocked too quickly. The present application has simple structure, convenient maintenance, and greater application potential than existing sand prevention devices. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a front structural schematic diagram of a variable-diameter sand dust separation module according to the present application;

[0017] Figure 2 Fig. 2 is a back structural schematic diagram of a variable-diameter sand dust separation module according to the present application;

[0018] Figure 3 Fig. 3 is a working principle diagram of a variable-diameter sand dust separation module according to the present application in hovering;

[0019] Figure 4 Fig. 4 is a working principle diagram of a variable-diameter sand dust separation module according to the present application in forward flight;

[0020] Wherein: 1-variable-diameter sand dust separation module, 2-anti-icing structure, 201-anti-icing curved surface, 202-side plate, 3-module frame, 4-vortex tube array. DETAILED DESCRIPTION

[0021] Currently, sand prevention devices are generally required to have the ability to fly for 30 minutes in a moderate icing environment. When flying in a certain icing cloud, the icing of the vortex tube of the sand prevention device is mainly affected by the water droplet collection coefficient. When the inlet of the vortex tube is directly opposite to the airflow, the water droplet collection coefficient is large, and the inlet of the vortex tube is more likely to be quickly blocked by ice. When the inlet of the vortex tube is at 90° to the airflow, the water droplet collection coefficient is small, and the inlet of the vortex tube is not easy to be blocked by ice.

[0022] As shown in Figures 1-2 The present application provides an ice-preventing variable-diameter sand and dust separation module 1, which comprises an ice-preventing structure 2, a module frame 3 and a vortex tube array 4. The ice-preventing structure 2 comprises an ice-preventing curved surface 201 and side plates 202, wherein:

[0023] The module frame 3 is a hollow structure, the upper end of the module frame 3 is open, the ice-preventing structure 2 is arranged on the module frame 3, and the vortex tube array 4 is arranged in the vertical direction in the module frame 3. The vortex tube array 4 comprises N vortex tubes.

[0024] The ice-preventing curved surface 201 is a curved surface structure with a smooth curvature, the projection of the ice-preventing curved surface 201 completely covers the vortex tube array 4 directly above, the projection area of the ice-preventing curved surface 201 is the same as the inlet plane area of the vortex tube array 4; the two sides of the ice-preventing curved surface 201 are respectively provided with the side plates 202; one side of the ice-preventing curved surface 201 is arranged at the rear side of the upper end of the module frame 3, and the horizontal right-angle sides of the two side plates 202 are respectively arranged at the two side edges of the upper end of the module frame 3; the upper side of the ice-preventing curved surface 201, the vertical right-angle sides of the two side plates 202 and the front side of the upper end of the module frame 3 form an air inlet.

[0025] Preferably, the air inlet area of the ice-preventing structure 2 is equal to the sum of the inlet cross-sectional areas of the N vortex tubes of the vortex tube array 4.

[0026] Preferably, the diameter of each vortex tube of the vortex tube array 4 close to the air inlet of the ice-preventing structure 2 is greater than the diameter of the vortex tube away from the air inlet of the ice-preventing structure.

[0027] Preferably, the diameters of each vortex tube of the vortex tube array 4 at the same distance from the air inlet of the ice-preventing structure 2 are the same.

[0028] Preferably, the air inlet of the ice-preventing structure 2 is arranged to face away from the airflow direction.

[0029] Preferably, the number N of the vortex tubes of the vortex tube array 4 ranges from 20 to 50.

[0030] Preferably, the ice-preventing curved surface 201 is smoothly transitioned.

[0031] It should be noted that the ice-preventing curved surface 201 should be smoothly transitioned to minimize the aerodynamic resistance as much as possible.

[0032] Preferably, the diameter of the vortex tubes in the vortex tube array 4 is between 17-38 mm.

[0033] Figure 3 The diagram illustrates the working principle of the sand and dust separation module of this invention when it is hovering. Air containing sand and dust flows through the separation module under the action of a downwash flow. Due to inertia, some of the sand and dust in the air flows directly through the separation module, while the remaining sand and dust enters the vortex tube array area through the anti-icing air inlet under the action of suction. Because different types of sand and dust have different airflow characteristics, large-diameter sand and dust particles enter the large-diameter vortex tubes near the anti-icing structure air inlet, while small-diameter sand and dust particles enter the small-diameter vortex tubes away from the anti-icing structure air inlet. The large-diameter vortex tubes have a larger rotation space, which can reduce the problem of low separation efficiency caused by the collision and rebound of large-diameter sand and dust particles. The small-diameter vortex tubes have a small rotation radius and strong centrifugal force, which can effectively separate small-diameter sand and dust particles.

[0034] Figure 4 The diagram shows the working principle of the sand and dust separation module of this invention during forward flight. Its principle is the same as that during hovering, and the similarities will not be repeated. During forward flight, the helicopter may encounter icing conditions. In this case, because the anti-icing air intake is opposite to the incoming flow direction, its water droplet collection coefficient is greatly reduced. Liquid water in the air can only accumulate at the anti-icing air intake under the action of suction, greatly enhancing its anti-icing capability.

[0035] In summary, the anti-icing variable-diameter sand and dust separation module provided in this application can simultaneously process sand and dust of different particle sizes, overcoming the shortcomings of existing sand control devices that are limited by sand and dust particle size and have low efficiency. Furthermore, the anti-icing structure adopted for the vortex tube air inlet effectively reduces the incoming water droplet collection coefficient and prevents premature clogging of the vortex tube air inlet. This invention has a simple structure, is easy to maintain, and has greater application potential than existing sand control devices.

Claims

1. An ice preventable variable pipe diameter sand dust separation module, characterized by, The variable-diameter sand dust separation module (1) comprises an anti-icing structure (2), a module frame (3), and a vortex tube array (4), the anti-icing structure (2) comprises an anti-icing curved surface (201) and a side plate (202), wherein: The module frame (3) is a hollow structure, the upper end of the module frame (3) is open, the anti-icing structure (2) is arranged on the module frame (3), the vortex tube array (4) is arranged in the module frame (3) in the vertical direction, and the vortex tube array (4) comprises N vortex tubes. The anti-icing curved surface (201) is a curved surface structure with a smooth curvature shape, the projection of the anti-icing curved surface (201) completely covers the vortex tube array (4) directly above, the projection area of the anti-icing curved surface (201) is the same as the inlet plane area of the vortex tube array (4), the two sides of the anti-icing curved surface (201) are respectively provided with the side plates (202), one side of the anti-icing curved surface (201) is arranged at the rear side of the upper end of the module frame (3), the horizontal right-angle edges of the two side plates (202) are respectively arranged at the two side edges of the upper end of the module frame (3), the upper edge of the anti-icing curved surface (201), the vertical right-angle edges of the two side plates (202), and the front edge of the upper end of the module frame (3) form an air inlet, and the diameter of each vortex tube of the vortex tube array (4) close to the air inlet of the anti-icing structure (2) is greater than the diameter of the vortex tube away from the air inlet of the anti-icing structure.

2. The variable pipe diameter sand-dust separation module of claim 1, wherein, The air inlet area of the anti-icing structure (2) is equal to the sum of the inlet cross-sectional areas of the N vortex tubes of the vortex tube array (4).

3. The variable pipe diameter sand-dust separation module of claim 1, wherein, The diameters of each vortex tube of the vortex tube array (4) at the same distance from the air inlet of the anti-icing structure (2) are the same.

4. The variable pipe diameter sand-dust separation module of claim 1, wherein, The air inlet of the anti-icing structure (2) is arranged in the direction opposite to the flow direction.

5. The variable pipe diameter sand-dust separation module of claim 1, wherein, The number N of the vortex tubes of the vortex tube array (4) ranges from 20 to 50.

6. The variable pipe diameter sand-dust separation module of claim 1, wherein, The anti-icing curved surface (201) is smoothly transitioned.

7. The variable pipe diameter sand-dust separation module of claim 1, wherein, The diameters of the vortex tubes of the vortex tube array (4) range from 17 mm to 38 mm.

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