Double-layer flute-shaped pipe structure

Abstract

The invention provides a double-layer flute-shaped pipe structure which comprises an inner-layer flute-shaped pipe, an outer-layer flute-shaped pipe, a first rotating mechanism and a second rotating mechanism, the outer-layer flute-shaped pipe is arranged outside the inner-layer flute-shaped pipe in a sleeving mode, the first rotating mechanism is connected with the outer-layer flute-shaped pipe, and the second rotating mechanism is connected with the inner-layer flute-shaped pipe, so that the inner-layer flute-shaped pipe and the outer-layer flute-shaped pipe can freely rotate; a plurality of rows of first jet flow holes with the same diameter are formed in a first side area of the inner-layer flute-shaped pipe, and a plurality of rows of second jet flow holes with the same diameter are formed in a second side area of the inner-layer flute-shaped pipe; a plurality of rows of third jet flow holes with the same diameter are formed in the first side area of the outer-layer flute-shaped pipe; the diameter of the first jet hole is different from the diameter of the second jet hole, and the diameter of the first jet hole and the diameter of the second jet hole are both smaller than or equal to the diameter of the third jet hole. The hole diameters, the row number, the distance, the number and the jet flow included angles of the jet flow holes in the flute-shaped pipe can be changed, and different hot air anti-icing effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft and engine anti-icing, and in particular to a double-layer flute structure. Background Art

[0002] The anti-icing system is a device that protects the flight safety of aircraft and aircraft engines when flying in icing conditions. When an aircraft flies in icing conditions, supercooled water droplets in the clouds hit the surface of the wings or engine air inlets, causing ice to form. Ice on the aircraft wings will change its aerodynamic shape, thereby reducing the aircraft's lift and increasing its drag. In addition, icing on the wings also has a great impact on the aircraft's maneuverability and stability. Ice on the engine's air intake system will reduce the flow area, reduce the engine's thrust, and even cause compressor surge. Ice falling off the wings and engine air inlets will damage the engine's fan or compressor blades, causing more serious safety accidents.

[0003] In order to ensure the flight safety of aircraft in icing weather conditions, an efficient and widely used anti-icing technology approach is the flared tube hot gas anti-icing system. A certain amount of hot air is drawn from the high-pressure compressor into the flared tube, and flows out through the jet holes on the flared tube to heat the surface of the protected area, thereby achieving the anti-icing effect.

[0004] During the development of the flute hot gas anti-icing system, in order to study the influence of different flute structures on the anti-icing performance, it is necessary to process different flute structures to carry out parameter optimization tests. The required test cost is high and the replacement of test parts is also relatively complicated.

[0005] In view of this, the inventor of the present application designed a double-layer flute structure in order to overcome the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defects in the prior art that in order to study the influence of different flute tube structures on anti-icing performance, different flute tube structures need to be processed to carry out parameter optimization tests, the required test cost is high, and the replacement of test pieces is also relatively complicated, and a double-layer flute tube structure is provided.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides a double-layer flute structure, which is characterized in that it includes an inner flute, an outer flute, a first rotating mechanism and a second rotating mechanism, the outer flute is sleeved outside the inner flute, the first rotating mechanism is connected to the outer flute, and the second rotating mechanism is connected to the inner flute, so that the inner flute and the outer flute can rotate freely; a first side area of ​​the inner flute is provided with multiple rows of first jet holes with the same diameter, and a second side area of ​​the inner flute is provided with multiple rows of second jet holes with the same diameter; a first side area of ​​the outer flute is provided with multiple rows of third jet holes with the same diameter; the diameter of the first jet hole is different from the diameter of the second jet hole, and the diameter of the first jet hole and the diameter of the second jet hole are both less than or equal to the diameter of the third jet hole.

[0009] According to an embodiment of the present invention, the outer flute tube and the inner flute tube are in contact with each other.

[0010] According to one embodiment of the present invention, the circumferential angle of each row of the first jet holes is a, the circumferential angle of each row of the second jet holes is b, and the circumferential angle of each row of the third jet holes is c, and the angles a and b are integer multiples of the angle c.

[0011] According to one embodiment of the present invention, in the axial direction of each row of the third jet holes, the distance between two adjacent third jet holes is d; in the axial direction of each row of the first jet holes, the distance between two adjacent first jet holes is e; in the axial direction of each row of the second jet holes, the distance between two adjacent second jet holes is f, and the distance e and the distance f are integer multiples of the distance d.

[0012] According to one embodiment of the present invention, the inner diameter of the outer flute-shaped tube is 70 mm, the wall thickness is 5 mm, and the length is 300 mm; the inner diameter of the inner flute-shaped tube is 50 mm, the wall thickness is 5 mm, and the length is 300 mm.

[0013] According to one embodiment of the present invention, the first side area of ​​the outer flute is provided with 5 rows of third jet holes with a diameter of 3 mm; the first side area of ​​the inner flute is provided with 5 rows of first jet holes with a diameter of 2 mm; the second side area of ​​the inner flute is provided with 3 rows of second jet holes with a diameter of 1 mm.

[0014] According to one embodiment of the present invention, the circumferential angle of each row of the third jet holes is 15°; the circumferential angle of each row of the first jet holes is 15°; and the circumferential angle of each row of the second jet holes is 30°.

[0015] According to an embodiment of the present invention, the distance between two axially adjacent holes in each row of the third jet holes is 15 mm.

[0016] According to an embodiment of the present invention, the distance between two axially adjacent holes in each row of the first jet holes is 30 mm.

[0017] According to an embodiment of the present invention, the distance between two axially adjacent holes in each row of the second jet holes is 60 mm.

[0018] The positive and progressive effects of the present invention are:

[0019] The double-layer flute structure of the present invention has at least the following advantages:

[0020] The double-layer flute tube structure of the present invention can utilize a rotating mechanism to control the double-layer flute tube to rotate in different ways, thereby changing the aperture, row number, distance, quantity and jet angle of the jet holes on the flute tube to achieve different hot gas anti-icing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0022] Figure 1 It is a cross-sectional schematic diagram of the double-layer flute structure of the present invention.

[0023] Figure 2 It is a three-dimensional schematic diagram of the double-layer flute structure of the present invention.

[0024] Figure 3A It is a first stereoscopic schematic diagram of the inner flute tube in the double-layer flute tube structure of the present invention.

[0025] Figure 3B It is a second stereoscopic schematic diagram of the inner flute tube in the double-layer flute tube structure of the present invention.

[0026] [Reference Signs]

[0027] Inner flute 100

[0028] First side area 110

[0029] Second side area 120

[0030] The first jet hole 130

[0031] The first row of jet holes 131

[0032] The second row of jet holes 132

[0033] The third row of jet holes 133

[0034] Fourth row of jet holes 134

[0035] Fifth row of jet holes 135

[0036] The second jet hole 140

[0037] The first row of jet holes 141

[0038] The second row of jet holes 142

[0039] The third row of jet holes 143

[0040] Outer flute 200

[0041] First side area 210

[0042] The third jet hole 220

[0043] The first row of jet holes 221

[0044] The second row of jet holes 222

[0045] The third row of jet holes 223

[0046] Fourth row of jet holes 224

[0047] Fifth row of jet holes 225 DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0050] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0051] like Figure 1 to Figure 3B As shown, the present invention provides a double-layer flute structure, including an inner flute 100, an outer flute 200, a first rotating mechanism and a second rotating mechanism.

[0052] The outer flute 200 is sleeved on the inner flute 100 , the first rotating mechanism is connected to the outer flute 200 , and the second rotating mechanism is connected to the inner flute 100 , so that the inner flute 100 and the outer flute 200 can rotate freely.

[0053] A plurality of rows of first jet holes 130 with the same diameter are formed on the first side region 110 of the inner layer flute 100 , and a plurality of rows of second jet holes 140 with the same diameter are formed on the second side region 120 of the inner layer flute 100 .

[0054] A plurality of rows of third jet holes 220 having the same diameter are formed on the first side region 210 of the outer flute 200 .

[0055] The diameter of the first jet hole 130 is different from the diameter of the second jet hole 140 , and both the diameter of the first jet hole 130 and the diameter of the second jet hole 140 are smaller than or equal to the diameter of the third jet hole 220 .

[0056] The first rotating mechanism and the second rotating mechanism respectively control the outer flute 200 and the inner flute 100 to rotate freely within a range of 360 degrees. Since the diameters of the first jet hole 130 and the second jet hole 140 are both less than or equal to the diameter of the third jet hole 220, the aperture of the jet hole can be adjusted by controlling the rotation of the outer flute 200 and the inner flute 100.

[0057] like Figure 1 and Figure 2 As shown, as a preferred embodiment of the double-layer flute tube structure of the present invention, the outer flute tube 200 and the inner flute tube 100 are attached to each other.

[0058] like Figure 2 to Figure 3B As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the circumferential angle of each row of first jet holes 130 is a, the circumferential angle of each row of second jet holes 140 is b, and the circumferential angle of each row of third jet holes 220 is c, and the angle a and the angle b are integer multiples of the angle c.

[0059] That is, the circumferential angle between every two adjacent rows of first jet holes 130 is a, the circumferential angle between every two adjacent rows of second jet holes 140 is b, and the circumferential angle between every two adjacent rows of third jet holes 220 is c. Since the angle a and the angle b are integer multiples of the angle c, the number of jet hole rows, the number of jet holes, and the jet angle can be adjusted through the free rotation of the outer layer flute 200 and the inner layer flute 100.

[0060] like Figure 2 to Figure 3B As shown, as a preferred embodiment of the double-layer flute structure of the present invention, in the axial direction of each row of third jet holes 220, the distance between two adjacent third jet holes 220 is d.

[0061] In the axial direction of each row of first jet holes 130 , the distance between two adjacent first jet holes 130 is e.

[0062] In the axial direction of each row of second jet holes 140 , the distance between two adjacent second jet holes 140 is f, and the distance e and the distance f are integer multiples of the distance d.

[0063] Since the distance e and the distance f are integer multiples of the distance d, the jet hole distance, the number of jet hole rows, and the number of jet holes can be adjusted through the free rotation of the outer flute 200 and the inner flute 100 .

[0064] like Figure 1 to Figure 3B As shown, as a preferred embodiment of the double-layer flute tube structure of the present invention, the outer flute tube 200 has an inner diameter of 70 mm, a wall thickness of 5 mm, and a length of 300 mm; the inner flute tube 100 has an inner diameter of 50 mm, a wall thickness of 5 mm, and a length of 300 mm.

[0065] like Figure 2 to Figure 3B As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the first side area 210 of the outer flute 200 is provided with 5 rows of third jet holes 220 with a diameter of 3 mm; the first side area 110 of the inner flute 100 is provided with 5 rows of first jet holes 130 with a diameter of 2 mm; the second side area 120 of the inner flute 100 is provided with 3 rows of second jet holes 140 with a diameter of 1 mm.

[0066] The third jet holes 220 include a first row of jet holes 221 , a second row of jet holes 222 , a third row of jet holes 223 , a fourth row of jet holes 224 and a fifth row of jet holes 225 .

[0067] The first jet holes 130 include a first row of jet holes 131 , a second row of jet holes 132 , a third row of jet holes 133 , a fourth row of jet holes 134 and a fifth row of jet holes 135 .

[0068] The second jet holes 140 include a first row of jet holes 141 , a second row of jet holes 142 and a third row of jet holes 143 .

[0069] like Figure 2 to Figure 3B As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the circumferential angle of each row of third jet holes 220 is 15°; the circumferential angle of each row of first jet holes 130 is 15°; and the circumferential angle of each row of second jet holes 140 is 30°.

[0070] That is, in the first row of jet holes 221, the second row of jet holes 222, the third row of jet holes 223, the fourth row of jet holes 224 and the fifth row of jet holes 225, the circumferential angle between every two adjacent rows of jet holes is 15°; in the first row of jet holes 131, the second row of jet holes 132, the third row of jet holes 133, the fourth row of jet holes 134 and the fifth row of jet holes 135, the circumferential angle between every two adjacent rows of jet holes is 15°; in the first row of jet holes 141, the second row of jet holes 142 and the third row of jet holes 143, the circumferential angle between every two adjacent rows of jet holes is 30°.

[0071] like Figure 2 As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the distance between two axially adjacent holes in each row of third jet holes 220 is 15 mm.

[0072] That is, in the first row of jet holes 221 , the second row of jet holes 222 , the third row of jet holes 223 , the fourth row of jet holes 224 and the fifth row of jet holes 225 , the distance between two adjacent holes in the axial direction of each row of jet holes is 15 mm.

[0073] like Figure 3A As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the distance between two adjacent holes in the axial direction of each row of first jet holes 130 is 30 mm.

[0074] That is, in the first row of jet holes 131 , the second row of jet holes 132 , the third row of jet holes 133 , the fourth row of jet holes 134 and the fifth row of jet holes 135 , the distance between two adjacent holes in the axial direction of each row of jet holes is 30 mm.

[0075] like Figure 3B As shown, as a preferred embodiment of the double-layer flute structure of the present invention, the distance between two axially adjacent holes in each row of the second jet holes 140 is 60 mm.

[0076] That is, in the first row of jet holes 141 , the second row of jet holes 142 , and the third row of jet holes 143 , the distance between two adjacent holes in the axial direction of each row of jet holes is 60 mm.

[0077] The double-layer flute tube structure of the present invention utilizes a rotating mechanism to control the double-layer tube of the flute tube to rotate in different ways, thereby realizing the adjustment of the aperture, row number, distance, quantity and jet angle of the jet holes on the flute tube, thereby changing the injected hot gas flow rate and the jet heating range, and realizing different hot gas anti-icing effects.

[0078] A preferred embodiment of the double-layer flute structure of the present invention is:

[0079] The first rotating mechanism is connected to the outer flute 200, and the second rotating mechanism is connected to the inner flute 100, so that the inner and outer flute can rotate freely 360 degrees.

[0080] The outer flute tube 200 has an inner diameter of 70 mm, a wall thickness of 5 mm, and a length of 300 mm. The inner flute tube 100 has an inner diameter of 50 mm, a wall thickness of 5 mm, and a length of 300 mm. The outer flute tube 200 and the inner flute tube 100 are bonded together.

[0081] Five rows of jet holes with a diameter of 3 mm are arranged on one side of the outer flute tube 200. The circumferential angle of each row of jet holes is 15°, and the distance between two adjacent small holes is 15 mm.

[0082] Five rows of 2mm diameter jet holes are arranged on one side of the inner flute tube 100. The circumferential angle of each row of jet holes is 15°, and the distance between two adjacent small holes is 30mm.

[0083] Three rows of jet holes with a diameter of 1 mm are arranged on the other side of the inner flute 100. The circumferential angle of each row of jet holes is 30°, and the distance between two adjacent small holes is 60 mm.

[0084] The above double-layer flute structure is used as follows:

[0085] (1) The first rotating mechanism and the second rotating mechanism are adjusted so that the first row of jet holes 221 of the outer flute tube 200 corresponds to the first row of jet holes 131 of the inner flute tube 100. The structural parameters of the entire flute tube can be adjusted to 5 rows of jet holes, 2 mm in diameter, 15° circumferential angle of each row of jet holes, and 30 mm between two adjacent small holes.

[0086] (2) By adjusting the first rotating mechanism and the second rotating mechanism so that the first row of jet holes 221 and the second row of jet holes 132 correspond to each other, the number of rows of the flute jet holes in (1) can be adjusted to 4; by adjusting the two rotating mechanisms so that the first row of jet holes 221 and the third row of jet holes 133 correspond to each other, the number of rows of the flute jet holes in (1) can be adjusted to 3; by adjusting the two rotating mechanisms so that the first row of jet holes 221 and the fourth row of jet holes 134 correspond to each other, the number of rows of the flute jet holes in (1) can be adjusted to 2; by adjusting the two rotating mechanisms so that the first row of jet holes 221 and the fifth row of jet holes 135 correspond to each other, the number of rows of the flute jet holes in (1) can be adjusted to 1.

[0087] (3) The first rotating mechanism and the second rotating mechanism are adjusted so that the fifth row of jet holes 225 of the outer flute tube 200 corresponds to the first row of jet holes 141 of the inner flute tube 100, and the structural parameters of the entire flute tube can be adjusted to 3 rows of jet holes, 1 mm in diameter, 30° circumferential angle of each row of jet holes, and 60 mm between two adjacent small holes; the two rotating mechanisms are adjusted so that the third row of jet holes 223 or the fourth row of jet holes 224 corresponds to the first row of jet holes 141, and the number of rows of jet holes in the flute tube in (3) can be adjusted to 2; the two rotating mechanisms are adjusted so that the first row of jet holes 221 or the second row of jet holes 222 corresponds to the first row of jet holes 141, and the number of rows of jet holes in the flute tube in (3) can be adjusted to 1.

[0088] The adjustment of the jet hole diameter, row number and quantity can realize the adjustment of the jet hot gas flow rate, and the adjustment of the jet distance and jet angle can realize the adjustment of the jet heating area range, thereby achieving different hot gas anti-icing effects.

[0089] By adding or changing the jet hole parameters in the above-mentioned embodiment in different areas on the inner flute 100, the jet hole diameter, row number, distance, quantity and jet angle adjustment range can be increased.

[0090] In summary, the double-layer flute structure of the present invention is connected to two rotating mechanisms respectively, so that the inner and outer flute tubes can rotate freely 360 degrees. Multiple rows of jet holes of different diameters are respectively opened on one side area and the other side area of ​​the inner flute tube 100, and multiple rows of jet holes of the same diameter are opened on one side area of ​​the outer flute tube 200. By controlling the inner and outer flute tubes to rotate at different angles through two rotating mechanisms, the aperture of the jet holes, the distance between the jet holes, the number of rows of the jet holes, the number of the jet holes and the jet angle can be adjusted to achieve different anti-icing effects.

[0091] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A double-layer flute-shaped tube structure, characterized in that: It includes an inner flute tube, an outer flute tube, a first rotating mechanism and a second rotating mechanism, The outer layer flute tube is sleeved outside the inner layer flute tube, the first rotating mechanism is connected to the outer layer flute tube, and the second rotating mechanism is connected to the inner layer flute tube, so that the inner layer flute tube and the outer layer flute tube can rotate freely; A plurality of rows of first jet holes with the same diameter are formed on the first side region of the inner flute tube, and a plurality of rows of second jet holes with the same diameter are formed on the second side region of the inner flute tube; A plurality of rows of third jet holes having the same diameter are provided on the first side region of the outer flute tube; The diameter of the first jet hole is different from the diameter of the second jet hole, and the diameter of the first jet hole and the diameter of the second jet hole are both smaller than or equal to the diameter of the third jet hole.

2. The double-layer flute structure according to claim 1, characterized in that: The outer layer flute tube and the inner layer flute tube are attached to each other.

3. The double-layer flute structure according to claim 2, characterized in that: The circumferential angle of each row of the first jet holes is a, the circumferential angle of each row of the second jet holes is b, and the circumferential angle of each row of the third jet holes is c. The angles a and b are integer multiples of the angle c.

4. The double-layer flute structure according to claim 3, characterized in that: In the axial direction of each row of the third jet holes, the distance between two adjacent third jet holes is d; In the axial direction of each row of the first jet holes, the distance between two adjacent first jet holes is e; In the axial direction of each row of the second jet holes, the distance between two adjacent second jet holes is f, and the distance e and the distance f are integer multiples of the distance d.

5. The double-layer flute structure according to claim 1, characterized in that: The inner diameter of the outer flute-shaped tube is 70 mm, the wall thickness is 5 mm, and the length is 300 mm; the inner diameter of the inner flute-shaped tube is 50 mm, the wall thickness is 5 mm, and the length is 300 mm.

6. The double-layer flute structure according to claim 1, characterized in that: The first side area of ​​the outer flute is provided with 5 rows of third jet holes with a diameter of 3 mm; the first side area of ​​the inner flute is provided with 5 rows of first jet holes with a diameter of 2 mm; the second side area of ​​the inner flute is provided with 3 rows of second jet holes with a diameter of 1 mm.

7. The double-layer flute structure according to claim 6, characterized in that: The circumferential angle of each row of the third jet holes is 15°; the circumferential angle of each row of the first jet holes is 15°; and the circumferential angle of each row of the second jet holes is 30°.

8. The double-layer flute structure according to claim 7, characterized in that: The distance between two axially adjacent holes in each row of the third jet holes is 15 mm.

9. The double-layer flute structure according to claim 7, characterized in that: The distance between two axially adjacent holes in each row of the first jet holes is 30 mm.

10. The double-layer flute structure according to claim 7, characterized in that: The distance between two axially adjacent holes in each row of the second jet holes is 60 mm.

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