A two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head.

Abstract

This invention relates to the field of aviation technology and discloses a two-dimensional vector nozzle mechanism with an adjustable S-curve resembling a snake's head. It includes a first, second, and third deflecting cylinder and a snake-mouth-like nozzle connected sequentially. The deflecting cylinders overlap and are hinged to rotate, with their sides forming an arc shape. The arc-shaped cylinders are staggered vertically and rotated by a hydraulic actuator assembly, forming a horizontal or snake-head-like upward-curve S-curve. The snake-mouth-like nozzle includes baffles hinged to the top and bottom edges of the opening of the third deflecting cylinder. Upper and lower shielding plate assemblies are curved inwards in an arc shape, resembling the upper and lower jaws of a snake's head, and their bottoms are fixedly connected to the baffles. A hydraulic actuator assembly drives the shielding plate assemblies to open and close the baffles. This invention, through the nozzle mode that alternates between horizontal and S-curve, provides vector adjustment in a single-axis direction of the nozzle and blocks infrared radiation, exhibiting excellent mechanical transmission performance and flow field characteristics. It also features a simple and easily controllable structure and high reliability.

Description

Technical Field

[0001] This invention relates to the field of aviation technology, and in particular to a two-dimensional vector nozzle mechanism with an adjustable S-curve resembling a snake's head. Background Technology

[0002] With the development of various detection technologies and the upgrading of infrared-guided weapons, modern information warfare places higher demands on the stealth performance of air superiority fighters. Traditional stealth fighters, relying on stealth shape design, cooling technology, and stealth materials to achieve low detectability, can no longer maintain their technological advantage. Therefore, integrating the airframe and engine into a stealth design has become a new design concept. Against this backdrop, the research and development of the S-curve nozzle has been put on the agenda. The S-curve stealth nozzle improves upon the conventional two-dimensional nozzle structure. Its unique S-curve configuration significantly reduces the infrared radiation intensity and electromagnetic scattering signal of the aircraft engine exhaust system, significantly enhancing the aircraft's stealth capabilities. It is mainly used in bombers, transport aircraft, and UAVs with low detectability requirements. The S-curve stealth nozzle has been used in combat on various foreign aircraft models, such as the B-2 strategic bomber, the X-47 unmanned combat aerial vehicle, and the "Neuron" UAV.

[0003] Existing technology 1:

[0004] Existing S-shaped nozzles, with their S-curve configuration, round-to-square cross-section transition, and two-dimensional nozzle geometry, offer significant advantages over conventional two-dimensional vectoring nozzles in shielding high-temperature and rotating engine components. Furthermore, the S-curve shape effectively shortens the nozzle exhaust plume, reducing the aircraft's detectability in the infrared band. The two-dimensional exit configuration also enhances the mixing of the exhaust with the surrounding atmosphere, further reducing the high-temperature core of the exhaust plume and suppressing the infrared radiation intensity of the hot exhaust. In summary, the S-curve nozzle is a crucial component of stealth technology. By reducing the aircraft's infrared and electromagnetic radiation, it makes the aircraft harder for the enemy to detect during missions, thereby improving survivability and mission success rate. However, because the S-curve nozzle is a single, integrally formed structure, it lacks thrust vectoring capability, meaning it sacrifices a significant portion of maneuverability.

[0005] Existing technology 2:

[0006] In existing literature, Chen Huaizhuang, "Structural Design and Optimization of Two-Dimensional Thrust Vectoring Nozzle" [D]. Jiangsu: Nanjing University of Aeronautics and Astronautics, 2008. DOI:10.7666 / d.d053111, provides a design method for two-dimensional thrust vectoring nozzles. The rear profile of the round-to-square two-dimensional vectoring nozzle is flattened, allowing for better alignment with the aircraft's wing-body structure, significantly reducing drag on the rear fuselage. Simultaneously, it generates supercirculation on the wing, further increasing lift and lowering the lift-to-drag ratio. This gives the F-22 fighter jet extremely excellent post-stall super-maneuverability, supersonic cruise capability, and short takeoff and landing capability. Furthermore, the nozzle's unique rectangular exit shape can shield other hot-end components in the engine, improving the aircraft's infrared and radar stealth capabilities. However, this nozzle cannot completely shield the engine's rear-view hot-end components, thus failing to achieve full engine stealth.

[0007] The defects of the S-curve nozzle and the two-dimensional vector nozzle are analyzed and compared as follows:

[0008] The existing S-curve nozzle structure is integrally formed, so it does not have thrust vectoring adjustment function, resulting in poor maneuverability of fighter jets equipped with S-curve nozzles. Although the S-curve nozzle can completely cover the rear hot end of the nozzle and achieve full engine stealth, it cannot achieve thrust vectoring adjustment, resulting in poor maneuverability.

[0009] The existing two-dimensional vector nozzle (Technology 2) possesses excellent maneuverability, but its drawbacks are also apparent: its complex mechanism leads to poor structural stress conditions, it is heavier than other vector nozzles, its internal flow characteristics are poor, its thrust loss is severe, it can only generate a single-axis thrust vector, and it cannot completely shield the engine heat source, leaving room for improvement in stealth performance. While the round-to-square two-dimensional vector nozzle offers excellent single-axis vector adjustment capability and outstanding aerodynamic performance, it also cannot completely shield the engine heat source. Summary of the Invention

[0010] The deficiencies of the prior art that this invention aims to solve are as follows:

[0011] 1. Solve the problem that existing S-curve nozzles cannot achieve vector deflection and have poor maneuverability;

[0012] 2. Solve the problem that the two-dimensional vector nozzle cannot completely block the engine heat source.

[0013] In order to overcome or alleviate one or more of the above technical problems, the purpose of this invention is to provide a two-dimensional vector nozzle mechanism with an adjustable S-curve similar to a snake's head, which has the vector deflection capability of a two-dimensional vector nozzle and the excellent stealth performance of an S-curve nozzle.

[0014] This invention addresses the needs of future aircraft for high stealth and high maneuverability, as well as the shortcomings of existing technologies. Based on biomimetic principles and drawing on the characteristics of snake head structure and movement postures, it provides the following technical solution:

[0015] A two-dimensional vector nozzle mechanism with an adjustable S-curve resembling a snake's head includes a first deflecting cylinder (5), a second deflecting cylinder (6), a third deflecting cylinder (7), and a snake-mouth nozzle connected sequentially. The first deflecting cylinder (5), the second deflecting cylinder (6), and the third deflecting cylinder (7) overlap and are hinged to rotate with arc-shaped cylinders on their sides. The arc-shaped cylinders are staggered vertically and rotated by a hydraulic actuator assembly to form a horizontal or snake-head-shaped S-curve. The snake-mouth nozzle includes baffles that are movably hinged to the top and bottom edges of the opening of the third deflecting cylinder (7). The upper and lower baffle assemblies are curved inward in an arc shape to resemble the upper and lower jaws of a snake's head, and their bottoms are fixedly connected to the corresponding baffles. The baffle assemblies are driven by the hydraulic actuator assembly to open and close the baffles vertically.

[0016] According to some embodiments, the deflector includes an upper deflector (10) and a lower deflector (13) respectively hinged to the open end of the third deflector cylinder (7); the hydraulic actuation assembly includes a first hydraulic actuation cylinder (1) disposed between the first deflector cylinder (5) and the second deflector cylinder (6) to adjust the relative rotation angle; a second hydraulic actuation cylinder (2) located on the opposite side of the upper and lower sides of the first hydraulic actuation cylinder (2) and disposed between the second deflector cylinder (6) and the third deflector cylinder (7) to adjust the relative rotation angle; a third hydraulic actuation cylinder (3) and a fourth hydraulic actuation cylinder (4) are symmetrically disposed on the top and bottom surfaces of the third deflector cylinder (7) and are correspondingly connected to the baffle assembly and the upper and lower deflectors through a connecting rod assembly.

[0017] According to some embodiments, the baffle assembly includes two, arranged symmetrically at the top and bottom. Each baffle assembly includes a first baffle (18) and a second baffle (18) that are sequentially and movably hinged to the third deflecting cylinder (7) in an arc shape. The bottom edge of the third baffle (20) below the second baffle (18) is fixedly connected to the corresponding deflector plate. One end of a plurality of springs (26) is connected to the connecting rod assembly, and the other end is connected to the inner side of the first, second and third baffle plates respectively, so that the first, second and third baffle plates fit tightly together. The baffle assembly is driven to move and drive the upper and lower deflectors to open and close through the third and fourth hydraulic actuator cylinders and the connecting rod assembly.

[0018] According to some embodiments, the linkage assembly includes a first linkage (8) and a second linkage (9). The first linkage (8) is L-shaped, with the top of the L-shaped included angle movably hinged to the third deflection cylinder (7). One end of the first linkage (8) is respectively hinged to the third or fourth hydraulic actuation cylinder, and the other end is hinged to the second linkage (9). The second linkage (9) is obtuse-angled with the opening facing inward. One end is connected to the first linkage (8), and the other end is connected to the upper baffle (10) or the lower baffle (13).

[0019] According to some embodiments, there are at least three springs (26) connecting a single baffle assembly, wherein the first spring (26) is connected at both ends to the first connecting rod (8) and the inner wall of the first baffle (18), the second spring (26) is connected at both ends to the second connecting rod (9) and the inner wall of the second baffle (19), and the third spring (26) is connected at both ends to the second connecting rod (9) and the inner wall of the third baffle (20).

[0020] According to some embodiments, the arc-shaped cylinder between the first deflecting cylinder (5) and the second deflecting cylinder (6) is located at the bottom; the arc-shaped cylinder between the second deflecting cylinder (6) and the third deflecting cylinder (7) is located at the top.

[0021] According to some embodiments, the cross-sections of the first deflecting cylinder (5), the second deflecting cylinder (6), and the third deflecting cylinder (7) are all rectangular.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention proposes a snake-head-inspired adjustable S-curve two-dimensional vector nozzle, combining the stealth performance of an S-curve nozzle with the aerodynamic performance of a two-dimensional vector nozzle. It exhibits excellent mechanical transmission performance and flow field characteristics, while also being simple in structure, easy to control, and highly reliable. The snake-head-inspired nozzle simultaneously possesses the stealth function of an S-curve nozzle and the vector adjustment function of a two-dimensional vector nozzle, demonstrating excellent structural design flexibility and infrared stealth performance. Its most significant advantage lies in the flexibility of the two-dimensional vector nozzle; by adjusting the drive source output, it can switch between the aircraft's conventional cruise mode and stealth flight mode. Particularly in terms of stealth, it can completely shield the high-heat components at the aircraft engine exhaust outlet, and the rectangular cross-section configuration can reduce the radar cross-section of the exhaust system, achieving a comprehensive stealth effect combining infrared and radar stealth. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the snake's head pitch posture provided in an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the snake head skeleton structure provided in an embodiment of the present invention.

[0026] Figure 3 This is a simplified diagram of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0027] Figure 4a This is a schematic diagram of the first deflection cylinder of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0028] Figure 4b This is a schematic diagram of the second deflection cylinder of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0029] Figure 4c This is a schematic diagram of the third deflection cylinder of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0030] Figure 4d This is a schematic diagram of the snake-mouth nozzle of the two-dimensional vector nozzle mechanism with adjustable S-curve, which is a snake-head-shaped nozzle according to an embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram showing the position of the spring inside the baffle plate of the snake-mouth nozzle provided in an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of an arc-shaped shielding plate provided in an embodiment of the present invention.

[0033] Figure 7a This is a schematic diagram of the connecting rod for a snake-mouth-like nozzle provided in an embodiment of the present invention.

[0034] Figure 7b This is a schematic diagram of the first connecting rod of the snake-mouth nozzle provided in an embodiment of the present invention.

[0035] Figure 7c This is a schematic diagram of the second connecting rod of the snake-mouth nozzle provided in an embodiment of the present invention.

[0036] Figure 8 This is a schematic diagram of the conventional cruise mode of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0037] Figure 9 This is a schematic diagram of the S-curve super stealth mode of the two-dimensional vector nozzle mechanism with an adjustable S-curve, mimicking a snake's head, provided in an embodiment of the present invention.

[0038] In the picture:

[0039] First hydraulic actuator 1; Second hydraulic actuator 2; Third hydraulic actuator 3; Fourth hydraulic actuator 4; First deflecting cylinder 5; Second deflecting cylinder 6; Third deflecting cylinder 7; First connecting rod 8; Second connecting rod 9; Upper baffle 10; Third connecting rod 11; Fourth connecting rod 12; Lower baffle 13; Round-to-square section 14; First hydraulic actuator bracket 15; First pin 16; Second hydraulic actuator bracket 17; First baffle 18; Second baffle 19; Third baffle 20; Second pin 21; First pin 22; Third pin 23; Fourth pin 24; Fifth pin 25; Spring 26. Detailed Implementation

[0040] The biomimetic technology concept of this invention is as follows:

[0041] By observing the bones and muscles of a snake's head, it was found that the snake's head movement mainly relies on powerful muscle groups. By contracting and relaxing different muscles, different bones are pulled to move together, enabling the snake to tilt its head up and down, open and close its mouth, and at the same time, the muscle tissue and snake skin can also play a sealing role. When the snake tilts its head up, the head and neck form an S-shape, and when the snake moves forward, the head and neck form a straight line.

[0042] like Figure 1 The S-curve stealth mode shown in (a) is achieved by the snake's head and neck spinal joints rotating to form a movement relationship, which allows the snake to raise its head and switch between a normal horizontal shape and an S-curve shape.

[0043] like Figure 1 The conventional cruise mode shown in (b) is as follows: the snake's mouth forms a cavity structure, and the muscle contraction and extension generate driving force to pull the skeleton and realize the opening and closing of the snake's mouth. It can be regarded as a two-dimensional vector nozzle with single-axis vector deflection capability.

[0044] like Figure 2 (a) shows a schematic diagram of the snake's skull, as shown in Figure 1. Figure 2(b) is a schematic diagram of the snake's head and neck skeleton. The structure of the nozzle is mapped to the above two feature patterns. The process of the snake's head pitching motion is incorporated into the nozzle design. The snake's head, neck, throat, and mouth are hollow structures. The spinal joints of snakes rotate with each other. They can deflect and open and close with each other by relying on the muscle tissue between the bones. Due to material limitations and considerations for practical applications, a rigid mechanical structure is used entirely in the structural mapping process. Its specific features are as follows: The multi-segmented vertebrae are simplified into segmented nozzle cylinders. Multi-axial movement during snake head rotation is discarded, retaining only uniaxial movement in the vertical direction. Therefore, the snake's abdominal cavity can be mapped as a straight rectangular cross-section cylinder with arc-like features. Hinge holes are provided between different segmented rectangular cross-section cylinders, with the arc-shaped segments of the hinge holes coaxial. Two adjacent cylinder segments are assembled through these hinge holes, with the top arc-shaped segments fitting together and sealed with graphite rings, allowing for mutual rotation between the two cylinder segments. To avoid separation and interference during rotation, the cylinder segments are designed with an oblique cut. The snake head achieves pitch, throat adjustment, and mouth opening and closing through muscle relaxation and contraction. Hydraulic actuators, mimicking the muscles between the joints of the snake head, provide power for the relative deflection of the nozzle cylinder.

[0045] Therefore, the design of this invention needs to achieve the following objectives:

[0046] 1: The nozzle cylinder structure mimics the neck-tilting movement of a snake's head;

[0047] 2: Nozzle mode that alternates between horizontal and S-curve nozzles;

[0048] 3: The biomimetic snake mouth two-dimensional vector nozzle enables vector adjustment in the single-axis direction of the nozzle and blocks infrared radiation, while the traditional S-curve nozzle does not have the functions of throat adjustment and vector adjustment.

[0049] Based on the above design concept, the present invention will be described in detail below with reference to embodiments and accompanying drawings. However, it should be understood that the embodiments and accompanying drawings are only for illustrative purposes and do not constitute any limitation on the scope of protection of the present invention. All reasonable modifications and combinations included within the scope of the inventive spirit of the present invention fall within the scope of protection of the present invention.

[0050] Example 1

[0051] The snake-head-shaped adjustable S-curve binary vector nozzle mechanism (hereinafter referred to as the nozzle mechanism) provided in this embodiment adopts a three-section cylindrical body as the main structure of the nozzle, and the fourth section is designed as a biomimetic snake mouth nozzle section, such as... Figures 4a-4d The diagram shows four structural segments. The upper images are all isometric views, and the lower images are all side views. Figure 4a In the middle, the left side of the first deflecting cylinder 5 is a straight cylinder, and the lower right side is an arc-shaped cylinder; Figure 4bIn the middle, the lower left side of the second deflecting cylinder 6 is curved downwards, and the upper right side is curved upwards; Figure 4c In the middle, the upper left side of the third deflecting cylinder 7 is arc-shaped, and the right side is straight. Figure 4d The nozzle is designed to resemble a snake's mouth, and includes a pair of baffle assemblies arranged symmetrically, one above the other. A simplified overall diagram is shown below. Figure 3 As shown, the three-dimensional isometric drawing is as follows Figure 8 As shown. The first deflecting cylinder 5, the second deflecting cylinder 6, and the third deflecting cylinder 7 are all rectangular cross-sections, sequentially interlocked in an arc shape. The upper side of the outer end of the third deflecting cylinder 7 is provided with an upper baffle 10, and the lower side is provided with a lower baffle 13. The upper and lower baffles are respectively provided with inward-facing baffle assemblies. The nozzle deflection or nozzle opening and closing is driven by multiple hydraulic actuation components. The hydraulic actuation components include a first hydraulic actuation cylinder 1 that drives and connects the first deflecting cylinder 5 and the second deflecting cylinder 2, and a second hydraulic actuation cylinder 2 that drives and connects the second deflecting cylinder 2 and the third deflecting cylinder 3. The first hydraulic actuation cylinder 1 is connected to the first deflecting cylinder 5 through a first hydraulic actuation cylinder bracket 15, and the second hydraulic actuation cylinder bracket 17 connects the third hydraulic actuation cylinder 3 to the third deflecting cylinder 7.

[0052] The first deflector cylinder 5 has a circular-to-square section 14 on its left side, with its circular cross-section connected to the aircraft's turbine engine via precision bolts. The right side of the first deflector cylinder 2 has a rectangular outlet. After the arc surfaces of the first deflector cylinder 5 and the second deflector cylinder 6 are concentrically assembled, they rotate around the first pin 16 in a sealed manner. To provide the driving force for the rotation of the second deflector cylinder 6, a first hydraulic actuator 5 is installed between the first deflector cylinder 5 and the second deflector cylinder 6. By pumping oil into the first hydraulic actuator 5, either the first or second deflector cylinder rotates on a fixed axis. The second deflector cylinder 6 and the third deflector cylinder 7 are driven by the second hydraulic actuator 2, creating different rotation angles between them. By changing the relative rotation angles between the deflector cylinders, the switching between different nozzle modes is achieved.

[0053] like Figure 7a The upper and lower baffles simulate a snake's mouth, mapped as a two-dimensional vector nozzle. They are fixed to the lower and upper sides of the third deflecting cylinder 9 facing the snake's mouth via second pins 21 at the top and bottom, respectively. Taking the upper baffle 10 as an example, the second connecting rod 9 is connected to the upper baffle 10 at one end via a pin, and the other end is connected to the first connecting rod 8 via a fifth pin 25. The first connecting rod 8 is powered by the third hydraulic actuator 3 to extend and retract, simultaneously driving the second connecting rod 9, causing the upper baffle 10 to rotate around the second pin 21. Similarly, the lower baffle 13 rotates around the lower second pin 21 under the power provided by the fourth hydraulic actuator 4 below. Figure 7b The first link 8 is L-shaped, such as Figure 7cThe second link 9 is an obtuse-angled rod. The first link 8 and the second link 9 are movably connected by the fourth shaft pin 24. The first link 8 and the third hydraulic actuator 3 are movably connected by the third pin 23. When the upper and lower deflectors rotate simultaneously, the direction of the exhaust airflow at the tail can be changed, enabling the fighter jet to achieve vector deflection in a single axis direction. The third link 11 is symmetrically arranged vertically with the first link 8, and the fourth link 12 is symmetrically arranged vertically with the second link 9.

[0054] The nozzle mechanism provided in this embodiment has the advantage of not only enabling the switching between conventional S-curve nozzles (conventional cruise mode and stealth mode) but also having the ability to vector deflect.

[0055] according to Figure 3 Based on the schematic diagram and design requirements of the mechanism, the dimensions of each section of the nozzle mechanism were determined, and a 3D model of the nozzle was created in the 3D modeling software SolidWorks. Each deflection section is shown below. Figures 4a-4d As shown.

[0056] The above describes the actuators of the nozzle mechanism, primarily providing corresponding configurations for different nozzle operating conditions and ensuring sealing between the various cylinder sections. To achieve switching between different nozzle postures, a drive mechanism is also required to provide power for the deflection between the nozzle cylinder sections. The nozzle mechanism's drive unit is a hydraulic actuator with a linkage mechanism. The first hydraulic actuator 1 provides power between the first deflecting cylinder 5 and the second deflecting cylinder 6, causing the deflecting cylinder to deflect around a pivot. Similarly, the second deflecting cylinder 6 and the third deflecting cylinder 7 are deflected by the second hydraulic actuator 2, causing them to rotate around a pivot. These two hydraulic actuators adjust the posture of the three main sections of the nozzle, enabling the nozzle to switch between a conventional horizontal posture and an S-curve posture.

[0057] The snake-mouth-like nozzle section mainly consists of upper and lower baffles, and three arc-shaped baffles on each side. Figure 5 and Figure 8 As shown, Figure 5 The nozzle, designed to resemble a snake's head, has upper and lower baffles connected to the third deflector cylinder 7 via pins. Since the upper and lower baffles mimic the opening and closing of a snake's mouth, they are designed as a symmetrical structure for easy installation. Baffle assemblies are movably connected to the upper and lower baffles respectively. A single baffle assembly is as follows... Figure 6 (a) Figure 6 (b) and Figure 6 In section (c), there are three baffles: a first baffle 18, a second baffle 19, and a third baffle 20. These three baffles form an arc shape. The first baffle 18 is fixedly connected to the upper deflector 10 by a first pin 22, while the second baffle 19 and the third baffle 20 are connected to the side of the third deflector cylinder 7 by pins. Figure 5The first and second baffles are fixed at one end to the third deflecting cylinder 7 by pins. At the same time, the first baffle 18 is connected to the first connecting rod 8 by spring 26 (dashed part) on the inner side of the baffle assembly. The second baffle 19 is connected to the second connecting rod 9 by spring 26. The upper and lower third baffles 20 are welded to the upper and lower baffles respectively. Spring 26 provides tension so that the three baffles can fit tightly together while having elastic deflection ability to control the opening and closing angle of the upper and lower baffles.

[0058] When the nozzle is in normal cruise mode, such as Figure 8 As shown, the nozzle is in a straight line at this time, has the ability to deflect two-dimensional vectors, and can better adapt to the engine afterburner state.

[0059] When the nozzle is in S-curve super stealth mode, such as Figure 9 As shown, the nozzle is in an S-shape, completely shielding the high-temperature components of the engine, resulting in good stealth while still retaining vector adjustment capability in a single axis direction.

[0060] Compared to conventional two-dimensional vector nozzles, this embodiment adds a variable-formation, rearward-facing, fully shielded S-bend nozzle, achieving high stealth capabilities. Compared to existing S-bend nozzles, this embodiment enhances two-dimensional vector adjustment capabilities. This embodiment simulates the movement of a snake's head, neck, and mouth, using first, second, and third deflection cylinders and a nozzle simulating a snake's mouth to achieve the transition from a horizontal to an S-bend nozzle configuration and the two-dimensional vector adjustment function.

[0061] The above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A two-dimensional vector nozzle mechanism with an adjustable S-curve resembling a snake's head, characterized in that: The device includes a first deflecting cylinder (5), a second deflecting cylinder (6), a third deflecting cylinder (7), and a snake-mouth nozzle connected in sequence. The first deflecting cylinder (5), the second deflecting cylinder (6), and the third deflecting cylinder (7) overlap and are hinged to rotate with arc-shaped cylinders that are curved on the sides. The arc-shaped cylinders are staggered vertically and are driven to rotate by a hydraulic actuator assembly to form a horizontal or snake-head-shaped S-bend. The snake-mouth nozzle includes baffles that are hinged to the top and bottom edges of the opening of the third deflecting cylinder (7). The upper and lower baffle assemblies are curved inward in an arc shape, resembling the upper and lower jaws of a snake's head. Their bottoms are fixedly connected to the corresponding deflector plates. The baffle assemblies are driven by the hydraulic actuation assembly to open and close the deflector plates.

2. The binary vector nozzle mechanism with adjustable S-curve resembling a snake's head according to claim 1, characterized in that: The deflector includes an upper deflector (10) and a lower deflector (13) that are respectively hinged to the open end of the third deflector cylinder (7); the hydraulic actuation assembly includes a first hydraulic actuation cylinder (1) that is disposed between the first deflector cylinder (5) and the second deflector cylinder (6) to adjust the relative rotation angle; a second hydraulic actuation cylinder (2) that is located on the opposite side of the upper and lower sides of the first hydraulic actuation cylinder (1) and is disposed between the second deflector cylinder (6) and the third deflector cylinder (7) to adjust the relative rotation angle; a third hydraulic actuation cylinder (3) and a fourth hydraulic actuation cylinder (4) are symmetrically disposed on the top and bottom surfaces of the third deflector cylinder (7) and are correspondingly connected to the baffle assembly and the upper and lower deflectors through a connecting rod assembly.

3. The binary vector nozzle mechanism with adjustable S-curve resembling a snake's head according to claim 2, characterized in that: The baffle assembly includes two components, arranged symmetrically at the top and bottom. Each baffle assembly includes a first baffle (18) and a second baffle (19) that are sequentially and movably hinged to the third deflecting cylinder (7) in an arc shape. The bottom edge of the third baffle (20) below the second baffle (19) is fixedly connected to the corresponding deflector plate. One end of each component is connected to the connecting rod assembly via several springs (26), and the other end is connected to the inner side of the first, second, and third baffle plates respectively, so that the first, second, and third baffle plates fit tightly together. The baffle assembly is driven to move and drive the upper and lower deflectors to open and close via the third and fourth hydraulic actuators and the connecting rod assembly.

4. The two-dimensional vector nozzle mechanism with adjustable S-curve resembling a snake's head according to claim 3, characterized in that: The connecting rod assembly includes a first connecting rod (8) and a second connecting rod (9). The first connecting rod (8) is L-shaped, with the top of the L-shaped included angle movably hinged to the third deflecting cylinder (7). One end of the first connecting rod is hinged to the third or fourth hydraulic actuating cylinder, and the other end is hinged to the second connecting rod (9). The second connecting rod (9) has an obtuse angle with the opening facing inward. One end is connected to the first connecting rod (8), and the other end is connected to the upper baffle (10) or the lower baffle (13).

5. The binary vector nozzle mechanism with adjustable S-curve resembling a snake's head according to claim 4, characterized in that: There are at least three springs (26) connecting a single baffle assembly, wherein the first spring (26) is connected at both ends to the first connecting rod (8) and the inner wall of the first baffle (18), the second spring (26) is connected at both ends to the second connecting rod (9) and the inner wall of the second baffle (19), and the third spring (26) is connected at both ends to the second connecting rod (9) and the inner wall of the third baffle (20).

6. The binary vector nozzle mechanism with adjustable S-curve resembling a snake's head according to claim 1, characterized in that: The arc-shaped cylinder between the first deflecting cylinder (5) and the second deflecting cylinder (6) is located at the bottom; the arc-shaped cylinder between the second deflecting cylinder (6) and the third deflecting cylinder (7) is located at the top.

7. The binary vector nozzle mechanism with adjustable S-curve according to any one of claims 1 to 6, characterized in that: The cross-sections of the first deflecting cylinder (5), the second deflecting cylinder (6), and the third deflecting cylinder (7) are all rectangular.

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