An arc plate cross type air mixing device

Abstract

The application relates to the field of high-altitude simulation test equipment of an aero-engine, and discloses an arc plate cross type air mixing device which comprises a shell component with a hollow structure, the shell component is provided with an air outlet branch pipe, a first air inlet branch pipe and a second air inlet branch pipe, a plurality of mutually independent first flow guide cavities are arranged between the first air inlet branch pipe and the air outlet branch pipe; a plurality of mutually independent second flow guide cavities are arranged between the second air inlet branch pipe and the air outlet branch pipe; and the first flow guide cavities and the second flow guide cavities are cross arranged at the positions corresponding to the air outlet branch pipe. The first flow guide cavities and the second flow guide cavities are cross arranged at the positions corresponding to the air outlet branch pipe, so that the two streams of compressed air with different temperatures at the front end of the front chamber can be divided, guided and mixed, and the temperature uniformity of the air mixing device outlet (the outlet end of the air outlet branch pipe) can meet the inlet condition of the front chamber of the high-altitude cabin.

Description

Technical Field

[0001] This invention relates to the field of high-altitude simulation test equipment for aero-engines, and discloses an arc-plate cross-type air mixing device. Background Technology

[0002] A high-altitude test stand for aero-engines (referred to as a high-altitude test stand) is a testing facility capable of simulating various flight conditions of aero-engines on the ground, playing a crucial role in the design and research of aero-engines. The intake and exhaust piping system, as a key component of the high-altitude test stand, serves as the connecting link between the test chamber and the power system, and possesses the function of regulating the airflow temperature, pressure, and flow rate along the route. The intake and exhaust piping system adopts a direct-connection continuous air supply method, with compressed air supplied to the forecourt and test chamber via the main air supply pipe and intake tower. Exhaust air is discharged through the exhaust manifold and venting tower. The main pipelines are equipped with regulating valves and work in conjunction with the testing system to ensure that the system can provide the airflow pressure, temperature, and flow rate required for the test.

[0003] To meet the requirements of engine inlet air temperature and pressure, a mixer needs to be installed in the high-altitude test bench inlet pipe network. The closer to the engine inlet, the higher the requirements for the mixing effect and rate of the mixing device. In particular, the mixing effect of the inlet air at the front end of the forecourt directly determines the quality of the inlet flow field of the engine under test in the high-altitude test bench. The quality of the flow field directly determines the effectiveness of the engine high-altitude simulation test. Summary of the Invention

[0004] The purpose of this invention is to provide an arc-plate cross-type air mixing device that can achieve the separation, guidance and mixing of two compressed air streams with different temperatures at the front end of the pre-chamber, ensuring that the temperature uniformity of the air mixing device outlet (outlet end of the air branch pipe) meets the inlet conditions of the high-altitude cabin pre-chamber.

[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:

[0006] An arc-plate cross-type air mixing device includes a shell component with a hollow structure. The shell component is provided with an air outlet branch pipe, a first air inlet branch pipe and a second air inlet branch pipe. Multiple independent first guide chambers are provided between the first air inlet branch pipe and the air outlet branch pipe. Multiple independent second guide chambers are provided between the second air inlet branch pipe and the air outlet branch pipe. The first guide chambers and second guide chambers are arranged cross-shaped at positions corresponding to the air outlet branch pipe.

[0007] Furthermore, the first guide cavity is formed by multiple first guide grilles disposed between the first intake branch pipe and the exhaust branch pipe, and a first fixed-distance sleeve is disposed between two adjacent first guide grilles.

[0008] Furthermore, the second flow guide cavity is formed by multiple second flow guide grilles disposed between the second intake branch pipe and the exhaust branch pipe, and a second fixed-distance sleeve is disposed between two adjacent second flow guide grilles.

[0009] Furthermore, the first and second guide grilles are parallel to each other, and the first and second guide grilles are intersecting in the area corresponding to the outlet branch pipe. A third fixed-distance sleeve is provided between the first guide grille and the adjacent second guide grille.

[0010] Furthermore, a positioning rod perpendicular to the first guide grille is provided at the intersection of the first guide grille and the second guide grille, and the positioning rod is fixed on the first guide grille or the second guide grille; a support assembly is installed on the inner wall of the housing component, and a limiting groove for locking the positioning rod is provided on the support assembly.

[0011] Furthermore, an elastic gasket is provided between the limiting groove and the positioning rod.

[0012] Furthermore, the housing component has two waist-shaped holes on opposite sides, with the two waist-shaped holes located near the outlet end of the air outlet branch pipe. The length direction of the waist-shaped holes is parallel to the airflow direction of the air outlet branch pipe. Limiting rods that pass through the first and second guide grilles are inserted into the two waist-shaped holes, and the diameter of the limiting rods is equal to the width of the waist-shaped holes.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the air mixing device of the present invention adopts the first guide cavity and the second guide cavity to be cross-arranged at the corresponding positions of the air outlet branch pipe, which can realize the separation, guidance and mixing of two compressed airs with different temperatures at the front end of the pre-chamber, and ensure that the temperature uniformity of the air mixing device outlet (outlet end of the air outlet branch pipe) meets the inlet conditions of the pre-chamber of the high-altitude cabin. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the arc-plate cross-type air mixing device in the embodiment;

[0015] Figure 2 This is a schematic diagram of the structure in the embodiment where the first and second flow guide grilles are arranged at an intersection;

[0016] Figure 3 This is a schematic diagram showing the distribution of the first and second guide grilles at the outlet branch pipe in the embodiment.

[0017] Figure 4 This is a schematic diagram of the installation structure of the support components and elastic gaskets in the embodiment;

[0018] Figure 5 This is a perspective view of the arc-plate cross-type air mixing device in the embodiment;

[0019] Among them, 1. exhaust branch pipe; 2. first intake branch pipe; 3. second intake branch pipe; 4. first guide grille; 5. first spacer sleeve; 6. second guide grille; 7. second spacer sleeve; 8. third spacer sleeve; 9. positioning rod; 10. support assembly; 11. elastic gasket; 12. waist-shaped hole. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0021] Example

[0022] See Figures 1-5 An arc-plate cross-type air mixing device includes a shell component with a hollow structure. The shell component is provided with an air outlet branch pipe 1, a first air inlet branch pipe 2, and a second air inlet branch pipe 3. Multiple independent first guide chambers are provided between the first air inlet branch pipe 2 and the air outlet branch pipe 1. Multiple independent second guide chambers are provided between the second air inlet branch pipe 3 and the air outlet branch pipe 1. The first guide chambers and second guide chambers are arranged cross-shaped at positions corresponding to the air outlet branch pipe 1.

[0023] In this embodiment, the housing component is located at the front end of the air intake chamber and is connected to two air intake passages at the front end of the chamber. One passage is connected to the first air intake branch pipe 2, and the airflow is diverted and rectified by the first guide cavity before being guided to the air outlet branch pipe 1. The other passage is connected to the second air intake branch pipe 3, and the airflow is diverted and rectified by the second guide cavity before being guided to the air outlet branch pipe 1. Finally, the two air intake passages at the front end of the chamber are mixed at the air outlet branch pipe 1. In this embodiment, the air mixing device is cross-arranged at the corresponding positions of the first and second guide cavities on the air outlet branch pipe 1, which can realize the diversion, guidance, and mixing of two compressed air passages with different temperatures at the front end of the chamber, ensuring that the temperature uniformity of the air mixing device outlet (the outlet end of the air outlet branch pipe 1) meets the inlet conditions of the high-altitude cabin front chamber.

[0024] In this embodiment, the first flow guiding cavity is formed by multiple first flow guiding grilles 4 disposed between the first inlet branch pipe 2 and the outlet branch pipe 1, and a first spacer sleeve 5 is disposed between two adjacent first flow guiding grilles 4. Multiple first flow guiding grilles 4 are disposed between the first inlet branch pipe 2 and the outlet branch pipe 1, and a sealing plate should be provided between two adjacent first flow guiding grilles 4 to ensure the flow guiding channel forming the first flow guiding cavity; and to ensure efficient gas delivery, the sealing plates on both sides should be designed with an arc-shaped structure to reduce air resistance. The first spacer sleeve 5 ensures the spacing between the first flow guiding grilles 4.

[0025] The second flow guiding cavity is formed by multiple second flow guiding grilles 6 separated between the second inlet branch pipe 3 and the outlet branch pipe 1, with a second spacer sleeve 7 positioned between two adjacent second flow guiding grilles 6. Multiple second flow guiding grilles 6 are positioned between the second inlet branch pipe 3 and the outlet branch pipe 1, and a sealing plate should be present between two adjacent second flow guiding grilles 6 to ensure the flow guiding channel forming the first flow guiding cavity; similarly, to ensure efficient gas delivery, the sealing plates on both sides should be designed with an arc-shaped structure to reduce air resistance. The second spacer sleeve 7 ensures the spacing between the first flow guiding grilles 4.

[0026] The first guide grille 4 and the second guide grille 6 are parallel to each other and are intersecting in the area corresponding to the outlet branch pipe 1. A third spacer sleeve 8 is provided between the first guide grille 4 and the adjacent second guide grille 6. The third spacer sleeve 8 is to ensure the spacing between the first guide grille 4 and its adjacent second guide grille 6. After the two airflows enter the corresponding guide chambers, they are split and rectified by the guide grille component, and are uniformly mixed at the outlet of the guide grille component and the outlet of the shell component.

[0027] Furthermore, a positioning rod 9 perpendicular to the first flow guide grille 4 is provided at the intersection of the first flow guide grille 4 and the second flow guide grille 6. The positioning rod 9 is fixed to the first flow guide grille 4 or the second flow guide grille 6. A support assembly 10 is installed on the inner wall of the housing component, and a limiting groove for locking the positioning rod 9 is provided on the support assembly 10. In actual implementation, the first flow guide grille 4, the second flow guide grille 6 and the inner wall of the housing component can be fixed or non-fixed. As long as there are independent first and second flow guide cavities, it is acceptable. However, in this embodiment, the first flow guide grille 4 and the second flow guide grille 6 are non-fixed to the housing component. The support assembly 10 is provided on the inner wall of the housing component to support the fixing of the first flow guide grille 4 and the second flow guide grille. By providing a limiting groove on the support assembly 10, and then locking the positioning rod 9 in the limiting groove, the positioning rod 9 only contacts the limiting groove at its bottom, thereby supporting the first flow guide grille 4 and the second flow guide grille 6. Non-fixed installation can effectively avoid the impact of excessive local thermal stress caused by temperature differences on the structural reliability of the air mixing device. It can also ensure that the first guide grille 4 and the second guide grille 6 can move vertically up and down within the housing component to absorb thermal deformation caused by temperature differences.

[0028] In addition, an elastic pad 11 is provided between the limiting groove and the positioning rod 9 in this embodiment, which can play a certain role in vibration reduction while ensuring that the first guide grille 4 and the second guide grille 6 can move up and down in the vertical direction within the housing component.

[0029] The housing component has two oblong holes 12 on opposite sides, positioned near the outlet end of the air outlet branch pipe 1. The length of the oblong holes 12 is parallel to the airflow direction of the air outlet branch pipe 1. Limiting rods, with diameters equal to the width of the oblong holes 12, are inserted into the two oblong holes 12, passing through the first guide grille 4 and the second guide grille 6. This design allows the first guide grille 4 and the second guide grille 6 to move vertically within the housing component while also restricting their lateral movement.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An arc-plate cross air-mixing device, characterized by, The shell component with hollow structure is provided with an air outlet branch pipe (1), a first air inlet branch pipe (2) and a second air inlet branch pipe (3), a plurality of first flow guide cavities are arranged between the first air inlet branch pipe (2) and the air outlet branch pipe (1) and are independent of each other; a plurality of second flow guide cavities are arranged between the second air inlet branch pipe (3) and the air outlet branch pipe (1) and are independent of each other; the first flow guide cavities and the second flow guide cavities are arranged in a cross manner at positions corresponding to the air outlet branch pipe (1); The first flow guide cavities are separated by a plurality of first flow guide grilles (4) arranged between the first air inlet branch pipe (2) and the air outlet branch pipe (1); the second flow guide cavities are separated by a plurality of second flow guide grilles (6) arranged between the second air inlet branch pipe (3) and the air outlet branch pipe (1); Positioning rods (9) perpendicular to the first flow guide grilles (4) are arranged at positions where the first flow guide grilles (4) and the second flow guide grilles (6) cross, and the positioning rods (9) are fixed on the first flow guide grilles (4) or the second flow guide grilles (6); a support assembly (10) is mounted on the inner wall of the shell component, and the support assembly (10) is provided with limiting grooves for clamping the positioning rods (9); Waist-shaped holes (12) are arranged on opposite sides of the shell component, and the two waist-shaped holes (12) are arranged at positions close to the outlet end of the air outlet branch pipe (1), the length direction of the waist-shaped holes (12) is parallel to the air flow direction of the air outlet branch pipe (1), and limiting rods are inserted into the two waist-shaped holes (12) and pass through the first flow guide grilles (4) and the second flow guide grilles (6), and the diameter of the limiting rods is equal to the width of the waist-shaped holes (12).

2. An air mixing device according to claim 1, wherein First distance sleeves (5) are arranged between two adjacent first flow guide grilles (4).

3. An air mixing device according to claim 2, wherein Second distance sleeves (7) are arranged between two adjacent second flow guide grilles (6).

4. An air mixing device according to claim 3, wherein The first flow guide grilles (4) and the second flow guide grilles (6) are parallel to each other, the first flow guide grilles (4) and the second flow guide grilles (6) are arranged in a cross manner in regions corresponding to the air outlet branch pipe (1), and third distance sleeves (8) are arranged between the first flow guide grilles (4) and the adjacent second flow guide grilles (6).

5. An air mixing device according to claim 1, wherein Elastic washers (11) are arranged between the limiting grooves and the positioning rods (9).

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