A combined nozzle with a splitter plate integrated with the sidewall surface

Abstract

The application discloses a combined nozzle with a shunt plate integrated with a side wall surface. The combined nozzle body is a two-dimensional nozzle which is spliced by an upper wall surface, a lower wall surface, a middle partition plate, a shunt plate, left and right integrated side wall surfaces and left and right side wall surfaces; the shunt plate and the integrated side wall surface are fixedly connected to form the "shunt plate integrated with the side wall surface" of the application, which is called "integrated shunt plate" for short. The side wall surface is provided with a rotation hole for mounting the integrated shunt plate; a driving mechanism of the integrated shunt plate is mounted on the outside of the integrated side wall; the integrated shunt plate can rotate around the axis of the integrated side wall to adjust the shape of the upper and lower flow channels and the throat area. The application is convenient for arranging the driving mechanism, can reduce the driving force required for the rotation of the integrated shunt plate, can reduce the strength problem of the connection between the integrated shunt plate and the middle partition plate under a complex force and heat environment, is convenient for realizing dynamic sealing of the integrated shunt plate and reducing the leakage between the flow channels and between the flow channels and the outside.

Description

Technical Field

[0001] This invention belongs to the field of combined power nozzle technology for aero-engines, specifically a combined nozzle with an integrated flow divider plate on the sidewall. Background Technology

[0002] Combined propulsion engines combine engines with different thermodynamic cycles, fully utilizing the advantages of different engines across various flight speed and airspace ranges to achieve high efficiency across a wide range. Common combined propulsion systems include combinations of turbine and ramjet engines, and combinations of ramjet and rocket engines. The combined nozzle is the main thrust component of a combined propulsion engine, and its performance is crucial to the overall performance of the engine.

[0003] A major challenge of wide-range flight is the vast variation in engine flow rate, necessitating the design of regulating mechanisms to control the combined nozzle flow. Splitters are a common method for adjusting the throat area of ​​combined-power nozzles. Their advantages include allowing for more complete expansion of the upper channel airflow, improving upper channel performance; reducing the lower channel exit area during combined operation, avoiding severe over-expansion losses; and the ability to completely close, enabling switching between dual-channel operation and preventing upper channel airflow damage to the engine during high Mach number flight. However, conventional splitter designs also present several problems: the limited internal space of the combined engine makes it difficult to install actuators; the splitter experiences significant aerodynamic loads, requiring substantial driving force or torque; the connection between the splitter and the middle partition plate, as a load-bearing component, presents a complex thermal environment, yet its thickness is often very thin due to space constraints, resulting in serious structural strength issues; and ensuring smooth rotation of the splitter while preventing significant cross-flow between the upper and lower channels presents a challenge in achieving a dynamic seal between the splitter and the sidewalls. Summary of the Invention

[0004] Purpose of the invention: In view of the above-mentioned prior art, a combined nozzle with an integrated flow divider plate on the side wall is proposed.

[0005] Technical solution:

[0006] A combined nozzle with an integrated flow divider plate on the sidewalls is disclosed. The combined nozzle is a binary nozzle, comprising an upper wall 1, an upper flow channel inlet 2, a middle partition plate 3, a lower flow channel inlet 4, a lower wall 5, an upper flow channel throat 6, a lower flow channel throat 7, a rotation axis 8, a connecting mechanism 9, a flow divider plate 10, two integrated sidewalls 11, and two symmetrical sidewalls 12. The space between the upper part of the middle partition plate 3 and the flow divider plate 10 and the upper wall 1 is defined as the upper flow channel, and the space between the lower part of the middle partition plate 3 and the flow divider plate 10 and the lower wall 5 is defined as the lower flow channel.

[0007] Preferably, both integrated sidewalls 11 are circularly rotated bodies, and the center of the integrated sidewall 11 coincides with the rotation axis 8. The integrated sidewall 11 is rotatably connected to the sidewall 12 around the rotation axis 8. The integrated sidewall 11 and the diverter plate 10 are fixedly connected as a whole, and this whole is defined as the "integrated diverter plate".

[0008] Preferably, the integrated sidewall 11 rotates around the rotation axis 8 to adjust the shape and area of ​​the upper flow channel throat 6.

[0009] Preferably, the end of the middle partition plate 3 is provided with an annular groove, and a ring is slidably connected in the annular groove. The ring is connected to one end of the diverter plate 10. The connecting mechanism 9 includes the annular groove and the ring. The centers of the annular groove and the ring coincide with the rotation axis 8.

[0010] Preferably, the central angle of the annular groove is 30° to 75°; the outer radius of the annular groove is the thickness of the end of the middle partition plate 3 to ensure a smooth transition of the upper flow channel surface; the width of the annular groove is 10% to 40% of the thickness of the end of the middle partition plate 3 to increase the rotation range of the integrated flow divider plate while avoiding affecting the rigidity of the middle partition plate 3; and a dynamic sealing structure is also provided in the annular groove.

[0011] Preferably, the minimum diameter of the integrated sidewall 11 is more than 200% of the thickness of the end of the middle partition plate 3, so as to improve the torsional strength at the connection between the diverter plate 10 and the integrated sidewall 11, and can increase the lever arm and reduce the driving force and torque; the maximum diameter of the integrated sidewall 11 is 50% to 120% of the length of the diverter plate 10.

[0012] Preferably, the area of ​​the downstream throat 7 is adjusted by a mechanical structure, which includes, but is not limited to, connecting rods, gears, and worm gears, to accommodate the range of variation of the downstream throat 7 from minimum to maximum.

[0013] Preferably, the sidewall 12 has a circular spin-forming hole, the spin-forming hole is coaxial with the integrated sidewall 11, the integrated sidewall 11 is supported by a bearing on the spin-forming hole of the sidewall 12, and a sealing component is provided for the gap between the integrated sidewall 11 and the sidewall 12.

[0014] Preferably, the integrated sidewall 11 and the sidewall 12 are flush with each other inside the flow channel and have no gaps.

[0015] Preferably, a drive mechanism is arranged on the outer side of the integrated sidewall 11, and the drive mechanism drives and connects to the integrated sidewall 11. The drive mechanism includes, but is not limited to, connecting rods, gears, and worm gears.

[0016] Beneficial effects: The combined nozzle with an integrated flow divider plate on the sidewall provided by the present invention has the following advantages compared with the prior art:

[0017] (1) By fixing the diverter plate and the side wall together as one unit, the drive device can be arranged on the outside of the integrated side wall, which is less restricted by space.

[0018] (2) The diameter of the integrated sidewall is more than twice the diameter of the rotating component at the connection between the splitter and the middle partition, so the lever arm is longer and the required driving force can be reduced.

[0019] (3) After the diverter plate and the side wall are fixed together, the drive mechanism on the outside of the side wall bears the force. The connection between the diverter plate and the middle partition plate only serves as a connection, thus avoiding the strength problem under complex force and heat environment.

[0020] (4) The gap between the integrated side wall and the side wall is a rotating pair, which facilitates the arrangement of the sealing structure and can reduce the leakage of airflow from the flow channel to the outside; while the diverter plate and the side wall are fixedly connected, which can reduce the cross-flow between the upper and lower flow channels.

[0021] (5) This invention can be combined with other combined nozzle rotation adjustment mechanisms. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the combined nozzle splitter plate integrated with the sidewall surface of the present invention after installation;

[0023] Figure 2 A 60° oblique view after the installation of the combined nozzle splitter plate integrated with the side wall surface;

[0024] Figure 3 Top view, rear view, side sectional view and 60° oblique view of the combined nozzle splitter integrated with the side wall;

[0025] Figure 4 This is a schematic diagram of the connection structure between the intermediate partition plate and the flow divider plate annular groove. Detailed Implementation

[0026] The invention will now be further explained with reference to the accompanying drawings.

[0027] Figure 1This is a cross-sectional view of the invention after installation. The invention is a combined nozzle with an integrated flow divider plate on the side wall. The combined nozzle is a binary nozzle, consisting of an upper wall (1), an upper flow channel inlet (2), a middle partition plate (3), a lower flow channel inlet (4), a lower wall (5), an upper flow channel throat (6), a lower flow channel throat (7), a rotation axis (8), a connecting mechanism (9), a flow divider plate (10), an integrated side wall (11), and a side wall (12). The upper wall (1), lower wall (5), middle partition plate (3), flow divider plate (10), integrated left and right side walls (11), and left and right side walls (12) are joined to form upper and lower flow channels.

[0028] like Figure 1 and Figure 2 As shown, the integrated nozzle splitter plate, which is integrated with the sidewall, allows the drive unit to be arranged on the outside of the integrated sidewall (11). The minimum diameter of the integrated sidewall (11) is more than 200% of the maximum diameter of the rotating structure of the connecting mechanism (9). This ensures that the torsional strength at the connection between the splitter plate (10) and the integrated sidewall (11) is better than that of a cylinder with a diameter equal to that of the connecting mechanism (9), and also increases the lever arm to reduce the driving force and torque. The maximum value of the diameter of the integrated sidewall (11) should avoid interference with other components, and is preferably 50% to 120% of the length of the splitter plate.

[0029] like Figure 1 and Figure 3 and Figure 4 As shown, the connecting mechanism (9) is a rotating mechanism using an annular groove, and its rotation axis is coaxial with the rotation axis (8). The integrated flow divider and the middle partition plate are in contact and aligned at the rotation axis (8). The preferred center angle of the annular groove of the middle partition plate is 30° to 75°. The preferred outer radius of the annular groove of the middle partition plate is the thickness of the middle partition plate at the connection to ensure a smooth transition of the upper flow channel profile. The preferred width of the annular groove of the middle partition plate is 10% to 40% of the thickness of the middle partition plate at the connection, which can maximize the rotation range of the integrated flow divider plate while avoiding affecting the rigidity of the middle partition plate. A dynamic sealing structure is provided in the annular groove to improve the sealing performance and prevent air leakage between the upper and lower channels.

[0030] like Figure 1 and Figure 2 As shown, the integrated sidewall (11) is supported by bearings and installed in the opening of the sidewall (12). This is a rotating pair, which facilitates the arrangement of dynamic sealing structures such as sealing grates, and can reduce leakage from the flow channel to the outside. Figure 1 and Figure 3 As shown, the flow divider (10) and the integrated side wall (11) are fixedly connected, which reduces the length of the relative sliding part of the flow divider (10) and the side wall (12), reduces the length of the sliding sealing component, and also reduces the possibility of air leakage between the two channels.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A combined nozzle with an integrated flow divider plate on the sidewall, characterized in that, The combined nozzle is a binary nozzle, including an upper wall (1), an upper flow channel inlet (2), a middle partition plate (3), a lower flow channel inlet (4), a lower wall (5), an upper flow channel throat (6), a lower flow channel throat (7), a rotation axis (8), a connecting mechanism (9), a flow divider plate (10), two integrated first side walls (11), and two symmetrical second side walls (12); the space between the upper part of the middle partition plate (3) and the flow divider plate (10) and the upper wall (1) is defined as the upper flow channel, and the space between the lower part of the middle partition plate (3) and the flow divider plate (10) and the lower wall (5) is defined as the lower flow channel; Both integrated first sidewalls (11) are circular spiral bodies, and the center of the integrated first sidewall (11) coincides with the rotation axis (8). The integrated first sidewall (11) is rotatably connected to the second sidewall (12) around the rotation axis (8). The integrated first sidewall (11) and the diverter plate (10) are fixedly connected as a whole, and this whole is defined as "integrated diverter plate". The integrated first sidewall (11) rotates around the rotation axis (8) to adjust the shape and area of ​​the upper flow channel throat (6); The middle partition plate (3) has an annular groove at its end, and a circular ring is slidably connected in the annular groove. The circular ring is connected to one end of the diverter plate (10). The connecting mechanism (9) includes the annular groove and the circular ring. The center of the annular groove and the circular ring coincide with the rotation axis (8).

2. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 1, characterized in that, The central angle of the annular chute is 30° to 75°; the outer radius of the annular chute is the thickness of the end of the middle partition plate (3) to ensure a smooth transition of the upper flow channel surface; the width of the annular chute is 10% to 40% of the thickness of the end of the middle partition plate (3) to increase the rotation range of the integrated flow divider plate while avoiding affecting the rigidity of the middle partition plate (3); a dynamic sealing structure is also provided in the annular chute.

3. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 1, characterized in that, The minimum diameter of the integrated first sidewall (11) is more than 200% of the thickness of the end of the middle partition plate (3) to improve the torsional strength at the connection between the diverter plate (10) and the integrated first sidewall (11), and to increase the lever arm and reduce the driving force and torque; the maximum diameter of the integrated first sidewall (11) is 50% to 120% of the length of the diverter plate (10).

4. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 1, characterized in that, The area of ​​the downstream throat (7) is adjusted by a mechanical structure to accommodate the range of variation of the downstream throat (7) from minimum to maximum.

5. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 1, characterized in that, The second sidewall (12) has a circular spin-forming hole, which is coaxial with the integrated first sidewall (11). The integrated first sidewall (11) is supported by a bearing on the spin-forming hole of the second sidewall (12), and a sealing component is provided in the gap between the integrated first sidewall (11) and the second sidewall (12).

6. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 1, characterized in that, The integrated first sidewall (11) and second sidewall (12) are flush with each other inside the flow channel and have no gaps.

7. A combined nozzle with an integrated flow divider plate on the sidewall as described in claim 6, characterized in that, A drive mechanism is arranged on the outside of the integrated first side wall (11), the drive mechanism driving and connecting the integrated first side wall (11), the drive mechanism including but not limited to connecting rods, gears, worm gears.

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