Binary thrust vectoring nozzle mechanism with snake head imitating type adjustable S bend

Abstract

The invention relates to the technical field of aviation, and discloses a snake-head-imitating S-bend-adjustable two-dimensional thrust vectoring nozzle mechanism which comprises a first deflection cylinder, a second deflection cylinder, a third deflection cylinder and a snake-nozzle-imitating nozzle which are movably connected in sequence, the deflection cylinders are overlapped through arc-shaped cylinders with the arc-shaped side faces and hinged to rotate, the arc-shaped cylinders are arranged in an up-down staggered mode, and the snake-nozzle-imitating nozzle is arranged in the arc-shaped cylinders. A rotation angle is driven by the hydraulic actuator assembly to form a horizontal S bend or an S bend imitating a snake head and a neck; the snake-mouth-imitating nozzle comprises baffle plates which are movably hinged to the top edge and the bottom edge of the opening of the third deflection cylinder body respectively; the upper and lower baffle plate assemblies are arc-shaped and bend inwards to imitate upper and lower jaws of a snake head, the bottoms of the baffle plate assemblies are fixedly connected with the baffle plate, and the baffle plate assemblies are driven by the hydraulic actuating assembly to drive the baffle plate to open and close up and down. Through a spray pipe mode of mutual conversion of horizontal and S-shaped spray pipes, vector adjustment in the single-axis direction of the spray pipe and shielding of infrared radiation, the spray pipe has good mechanical transmission performance and flow field characteristics, and is simple in structure, easy to control and high in reliability.

Description

Technical Field

[0001] The invention relates to the field of aviation technology, and in particular to a snake-head-like adjustable S-bend binary vector nozzle mechanism. Background Art

[0002] With the development of various detection technologies and the update and iteration of infrared guided weapons, modern information warfare has put forward higher requirements for the stealth performance of air superiority fighters. The traditional stealth fighters that rely on stealth shape design, cooling technology and stealth materials to achieve low detectable stealth performance can no longer maintain their own technical advantages. Therefore, integrating the fuselage and the engine for stealth design has become a new design concept. Against this background, the research and development of the S-bend nozzle has been put on the agenda. The S-bend stealth nozzle has improved the nozzle structure on the basis of the conventional dual nozzle nozzle. The unique S-bend configuration can greatly reduce the infrared radiation intensity and electromagnetic scattering signal of the aircraft engine exhaust system, significantly enhance the stealth capability of the aircraft, and is mainly used in bombers, transport aircraft and drones with low detectability requirements. The S-bend stealth nozzle has been used in actual combat on many types of foreign aircraft, such as the B-2 strategic bomber, the X-47 unmanned fighter and the "neuron" drone.

[0003] Prior art 1:

[0004] The existing S-bend nozzle has the geometric characteristics of an S-bend configuration, a transition from a round to a square section, and a binary nozzle. When shielding the high-temperature components and rotating components of the engine, it has a huge advantage over the conventional binary vector nozzle configuration. At the same time, the shape of the S-bend nozzle can effectively shorten the length of the nozzle tail flame, and the shorter tail flame can reduce the detectability of the aircraft in the infrared band. The S-bend nozzle can also strengthen the mixing of the jet and the outside atmosphere through the binary outlet configuration, thereby reducing the high-temperature core area of ​​the tail flame and achieving the purpose of suppressing the infrared radiation intensity of the hot jet. In general, the S-bend nozzle is an important component of stealth technology. It reduces the radiation of infrared and electromagnetic signals of the aircraft, helping the aircraft to be more difficult to be detected by the enemy when performing a mission, thereby improving survivability and mission success rate. However, since the structure of the S-bend nozzle is formed in an integrated manner, it does not have the thrust vector adjustment function itself, which also means that the S-bend nozzle abandons a large part of its maneuverability.

[0005] Prior art 2:

[0006] In the existing literature, Chen Huaizhuang. Structural design and optimization of dual thrust vector nozzle [D]. Jiangsu: Nanjing University of Aeronautics and Astronautics, 2008. DOI: 10.7666 / d.d053111. provides a design method for a dual thrust vector nozzle, in which the outer contour of the rear of the round-to-square dual vector nozzle is flat, which can better overlap with the wing-body of the aircraft, greatly reducing the resistance of the rear fuselage, and at the same time forming a hyperloop on the wing, further increasing the lift of the aircraft and reducing the lift-to-drag ratio, which makes the F22 fighter have extremely excellent super-stall supermaneuverability, supersonic cruise capability and short-range takeoff and landing capability. At the same time, the unique rectangular outlet shape of the nozzle can shield other hot end components in the engine, which is beneficial to improving the infrared stealth and radar stealth capabilities of the fighter. However, the nozzle cannot completely shield the hot end components of the engine from the rear, and cannot achieve the full stealth effect of the engine.

[0007] The analysis and comparison of the defects of the S-bend nozzle and the binary vector nozzle are as follows:

[0008] The S-bend nozzle structure of the prior art 1 is formed in an integrated manner, so it does not have a thrust vector adjustment function, which makes the fighter equipped with the S-bend nozzle have poor maneuverability. Although the S-bend nozzle can completely block the hot end of the nozzle rear view and realize the full stealth of the engine, it cannot realize vector adjustment and has poor maneuverability.

[0009] The binary vector nozzle of the second prior art has excellent maneuverability, but the disadvantages of this nozzle are also obvious. The structure is relatively complex, which makes the structural stress condition poor, the weight is greater than other vector nozzles, the internal flow characteristics are poor, the thrust loss is serious, and it can only produce a single-axis thrust vector. At the same time, it cannot completely block the engine heat source, and there is still room for improvement in stealth performance. Although the round-to-square binary vector nozzle has good single-axis vector adjustment capabilities and extremely excellent aerodynamic performance, it cannot completely block the engine heat source. Summary of the invention

[0010] The defects of the prior art that the present invention needs to solve are as follows:

[0011] 1. Solve the problem that the existing S-bend nozzle cannot achieve vector deflection and has poor maneuverability;

[0012] 2. Solve the problem that the binary 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 the present invention is to provide a snake-head-like adjustable S-bend binary vector nozzle mechanism, which has the vector deflection capability of the binary vector nozzle and the excellent stealth performance of the S-bend nozzle.

[0014] In view of the requirements of high stealth and high maneuverability of future aircraft and the defects of the prior art, the present invention provides the following technical solutions based on the bionic principle and the characteristics of the snake head structure and its movement posture:

[0015] A binary vector nozzle mechanism with adjustable S-bend imitating a snake head, comprising a first deflection cylinder (5), a second deflection cylinder (6), a third deflection cylinder (7) and a snake-like mouth nozzle, which are movably connected in sequence, wherein the first deflection cylinder (5), the second deflection cylinder (6) and the third deflection cylinder (7) overlap and rotate in a hinged manner with arc-shaped cylinders on the side surfaces, and the arc-shaped cylinders are arranged alternately up and down, and are driven to rotate at an angle by a hydraulic actuator assembly to form a horizontal or snake-like S-bend; the snake-like mouth nozzle comprises baffles movably hinged to the top and bottom edges of the opening of the third deflection cylinder (7); upper and lower shielding plate assemblies are curved inwardly in an arc shape to imitate the upper and lower jaws of a snake head, and the bottoms thereof are fixedly connected to the corresponding baffles, and the baffles are driven to open and close up and down by the hydraulic actuator assembly.

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

[0017] According to some embodiments, the baffle plate assembly includes two baffle plates that are symmetrically arranged in an upper and lower manner. A single baffle plate assembly includes a first baffle plate (18) and a second baffle plate (18) that are hinged in an arc shape on the third deflection cylinder (7) in sequence. The bottom edge of the third baffle plate (20) below the second baffle plate (18) is fixedly connected to the corresponding baffle plate, and one end of the third baffle plate is connected to the connecting rod assembly through a plurality of springs (26), and the other end is respectively connected to the inner side of the first, second and third baffle plates, so that the first, second and third baffle plates are tightly fitted; and the baffle plate assembly is driven to move and the upper and lower baffle plates are driven to open and close through the third and fourth hydraulic actuators and the connecting rod assembly.

[0018] According to some embodiments, the connecting rod assembly includes a first connecting rod (8) and a second connecting rod (9), the first connecting rod (8) is L-shaped, the top end of the L-shaped angle is movably hinged on the third deflection cylinder (7), one end of which is hinged to the third or fourth hydraulic actuator cylinder, and the other end is hinged to the second connecting rod (9), the second connecting rod (9) is 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).

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

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

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

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

[0023] The present invention proposes a snake-head-like adjustable S-bend binary vector nozzle, which combines the stealth performance of the S-bend nozzle and the aerodynamic performance of the binary vector nozzle, and has good mechanical transfer performance and flow field characteristics. At the same time, it has a simple structure, is easy to control, and has high reliability. The snake-head-like nozzle has both the stealth function of the S-bend nozzle and the vector adjustment function of the binary vector nozzle, and has excellent structural designability and infrared stealth performance. The most significant advantage is the flexibility of the binary vector nozzle. By adjusting the output of the driving source, the aircraft can switch between the conventional cruise mode and the stealth flight mode. In particular, in terms of stealth, the high-heat components at the outlet of the aircraft engine can be completely shielded. The rectangular cross-section configuration can also reduce the radar cross-sectional area of ​​the exhaust system, achieving a comprehensive stealth effect of infrared stealth and radar stealth. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the pitch posture of the snake head provided in an embodiment of the present invention.

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

[0026] Figure 3 A schematic diagram of a snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0027] Figure 4a A schematic diagram of a first deflection cylinder of a snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0028] Figure 4b A schematic diagram of the second deflection cylinder of the snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0029] Figure 4c A schematic diagram of the third deflection cylinder of the snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0030] Figure 4d A schematic diagram of a snake-like nozzle of a binary vector nozzle mechanism with a snake-head-like adjustable S-bend provided in an embodiment of the present invention.

[0031] Figure 5 A schematic diagram of the position of a spring in a shielding plate of a snake-mouth-like nozzle provided in an embodiment of the present invention.

[0032] Figure 6 A schematic diagram of a curved shielding plate provided in an embodiment of the present invention.

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

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

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

[0036] Figure 8 A schematic diagram of the conventional cruise mode of the snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0037] Fig. 9 Schematic diagram of the S-bend super stealth mode of the snake-head-like adjustable S-bend binary vector nozzle mechanism provided in an embodiment of the present invention.

[0038] In the figure:

[0039] The first hydraulic actuator 1; the second hydraulic actuator 2; the third hydraulic actuator 3; the fourth hydraulic actuator 4; the first deflection cylinder 5; the second deflection cylinder 6; the third deflection cylinder 7; the first connecting rod 8; the second connecting rod 9; the upper baffle 10; the third connecting rod 11; the fourth connecting rod 12; the lower baffle 13; the circular rotating square section 14; the first hydraulic actuator bracket 15; the first pin 16; the second hydraulic actuator bracket 17; the first baffle plate 18; the second baffle plate 19; the third baffle plate 20; the second pin 21; the first pin 22; the third pin 23; the fourth pin 24; the fifth pin 25; the spring 26. DETAILED DESCRIPTION

[0040] The bionic technology ideas of the present invention are as follows:

[0041] By observing the skeletal muscles of snakes' heads, it was found that the movement of snakes' heads mainly depends on powerful muscle groups. By contracting and relaxing different muscles and pulling different bones to move against each other, the snake can pitch its head and open and close its mouth. At the same time, the muscle tissue and snake skin can play a sealing role. When the snake raises its head, the head and neck form an S shape. When the snake crawls forward, the head and neck form a straight line.

[0042] like Figure 1 .a shows the S-bend stealth mode: the snake's head and neck spine joints rotate to form a movement relationship, so that the snake can raise its head and switch between the regular horizontal form and the S-bend form;

[0043] like Figure 1 .b shows the normal cruise mode: a hollow structure is formed in the snake's mouth, and driving force is generated by muscle contraction and extension to pull the bones to achieve the opening and closing of the snake's mouth. It can be regarded as a binary vector nozzle with single-axis vector deflection capability.

[0044] like Figure 2 .a is a schematic diagram of the snake head skeleton, such as Figure 2.b is a schematic diagram of the snake head and neck skeleton. When mapping the structure of the nozzle for the above two characteristic modes, the changing process of the snake head's pitch motion is referenced in the nozzle design. The snake's neck, throat, and mouth are hollow structures. The snake's spinal joints rotate with each other, and rely on the muscle tissue between the bones to achieve mutual deflection and opening and closing. Due to material limitations and considerations for actual application scenarios, a completely rigid mechanical structure is used in the structural mapping process. Its specific features are as follows: the multi-segmented spine is simplified into a segmented nozzle barrel, the multi-axis movement when the snake head rotates is abandoned, and only the uniaxial movement in the vertical direction is retained. Therefore, the snake's abdominal cavity can be mapped into a straight rectangular cross-section cylinder with arc features, wherein hinge holes are provided between different segmented rectangular cross-section cylinders, the arc segments of the hinge holes are coaxial, and two adjacent cylinder segments are assembled through the hinge holes. The arc segments at the top fit each other and are sealed with graphite rings to achieve mutual rotation between the two cylinder segments. In order to avoid separation and interference during the mutual rotation of the cylinder segments, the cylinder segments are designed to be beveled. The snake head achieves pitch, throat adjustment, and mouth opening and closing through muscle relaxation and contraction, and uses hydraulic actuators to imitate the muscles between the joints of the snake head to provide power for the relative deflection of the nozzle barrel.

[0045] Therefore, the present invention is designed to achieve the following goals:

[0046] 1: The nozzle barrel structure that mimics the movement of a snake head and neck;

[0047] 2: The nozzle mode of horizontal-S-bend nozzle transformation;

[0048] 3: The bionic snake-like binary vector nozzle can realize vector adjustment in the single-axis direction of the nozzle and shield infrared radiation, while the traditional S-bend nozzle does not have the adjustable throat and vector adjustment functions.

[0049] Based on the above design ideas, the present invention is described in detail below in combination with the embodiments and drawings, but it should be understood that the embodiments and drawings are only used to exemplify the present invention and do not constitute any limitation on the protection scope of the present invention. All reasonable changes and combinations within the scope of the inventive concept of the present invention fall within the protection scope of the present invention.

[0050] Example 1

[0051] The snake-head-like adjustable S-bend binary vector nozzle mechanism (hereinafter referred to as the nozzle mechanism) provided in this embodiment adopts a three-section barrel as the main structure of the nozzle, and the fourth section is designed as a bionic snake-mouth nozzle section, such as Figure 4a-4b The four sections of the structure shown in the figure are all axonometric drawings in the upper figure and side views in the lower figure. Figure 4a In the figure, the left side of the first deflection cylinder 5 is a straight cylinder, and the lower right side is an arc-shaped cylinder; Figure 4bIn the figure, the lower left end of the second deflection cylinder 6 is in a lower arc shape, and the upper right end is in an upper arc shape; Figure 4c In the figure, the upper left side of the third deflection cylinder 7 is arc-shaped, and the right side is straight; Figure 4d It is a snake-like nozzle, which includes a pair of shielding plate components, arranged symmetrically up and down. Figure 3 As shown, the three-dimensional axonometric drawing is Figure 8 As shown. The first deflection cylinder 5, the second deflection cylinder 6 and the third deflection cylinder 7 are all of rectangular cross-sectional configuration, and the arcs are embedded and connected to each other in sequence. The upper side of the outer end of the third deflection 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 baffle assemblies. The nozzle deflection or nozzle opening and closing is driven by multiple hydraulic actuating assemblies. The hydraulic actuating assembly includes a first hydraulic actuating cylinder 1 that drives and connects the first deflection cylinder 5 and the second deflection cylinder 2, and a second hydraulic actuating cylinder 2 that drives and connects the second deflection cylinder 2 and the third deflection cylinder 3. The first hydraulic actuating cylinder 1 is connected to the first deflection cylinder 5 through a first hydraulic actuating cylinder bracket 15, and the second hydraulic actuating cylinder bracket 17 connects the third hydraulic actuating cylinder 3 to the third deflection cylinder 7.

[0052] Among them, the left side of the first deflection cylinder 5 is a circular rotating square section 14, and its left circular cross section is connected to the aircraft's turbine engine through precision bolts. The right side of the first deflection cylinder 2 is a rectangular outlet. After the first deflection cylinder 5 and the second deflection cylinder 6 are assembled concentrically, they rotate around the first pin 16 in a sealed manner. In order to provide a driving force for the second deflection cylinder 6 to rotate, a first hydraulic actuator 5 is installed between the first deflection cylinder 5 and the second deflection cylinder 6. By pumping oil into the first hydraulic actuator 5, the first or second deflection cylinder is rotated on a fixed axis. The second deflection cylinder 6 and the third deflection cylinder 7 are driven by the second hydraulic actuator 2, so that different rotation angles are formed between the third deflection cylinder 7 and the second deflection cylinder 6. By changing the relative rotation angle between the deflection cylinders, the switching between different modes of the nozzle is realized.

[0053] like Figure 7a , the upper and lower baffles simulate the snake mouth and are mapped as binary vector nozzles. They are fixed to the lower and upper sides of the third deflection cylinder 9 facing the snake mouth through the upper and lower second pins 21 respectively. Taking the upper baffle 10 as an example, the second connecting rod 9 is connected to the upper baffle 10 through one end of the pin, and the other end is connected to the first connecting rod 8 through the fifth pin 25. The first connecting rod 8 is powered by the third hydraulic actuator 3 to achieve extension and retraction, and at the same time drives the second connecting rod 9 to make the upper baffle 10 rotate around the second axis pin 21. Similarly, the lower baffle 13 rotates around the second axis pin 21 at the bottom under the power provided by the fourth hydraulic actuator 4. Figure 7b , the first connecting rod 8 is L-shaped, such as Figure 7c, the second connecting rod 9 is an obtuse angle rod, the first connecting rod 8 and the second connecting rod 9 are movably connected through the fourth shaft pin 24, and the first connecting rod 8 and the third hydraulic cylinder 3 are movably connected through the third pin shaft 23. When the upper and lower baffles rotate at the same time, the purpose of changing the direction of the tail jet airflow can be achieved, so that the fighter can achieve vector deflection in a single axis direction. The third connecting rod 11 is symmetrically arranged with the first connecting rod 8, and the fourth connecting rod 12 is symmetrically arranged with the second connecting rod 9.

[0054] The advantage of the nozzle mechanism provided in this embodiment over the conventional S-bend nozzle is that, while realizing the conversion of the two nozzle working modes of conventional cruise mode and stealth mode, it also has the ability of vector deflection.

[0055] according to Figure 3 The dimensions of each barrel section of the nozzle mechanism are determined based on the mechanism schematic diagram and design requirements, and a three-dimensional model of the nozzle is established in the three-dimensional modeling software SolidWorks. The deflection barrel sections are shown in Figure 4.

[0056] The above is the actuator of the nozzle mechanism, which mainly provides corresponding shapes for different working conditions of the nozzle and ensures the sealing between each barrel section. In order to realize the switching of different postures of the nozzle, it is also necessary to design a driving mechanism to provide power for the deflection between the nozzle barrel sections. The driving device of the nozzle mechanism is a hydraulic actuator plus a connecting rod mechanism. The first deflection cylinder 5 and the second deflection cylinder 6 are powered by the first hydraulic actuator 1 to deflect the deflection cylinder around the pin shaft; similarly, the second deflection cylinder 6 and the third deflection cylinder 7 are provided with deflection power by the second hydraulic actuator 2 to rotate them around the pin shaft. The three-section main structure of the nozzle is adjusted in posture through two hydraulic actuators to realize the switching of the nozzle between the conventional horizontal shape and the S-bend shape.

[0057] The snake-like nozzle section is mainly composed of upper and lower baffles and three arc-shaped shielding plates at the top and bottom. Figure 5 and Figure 8 As shown, Figure 5 The nozzle is designed to imitate the snake head. The upper and lower baffles are connected to the third deflection cylinder 7 through a pin. Since the upper and lower baffles simulate the opening and closing of the snake mouth, they are designed to be symmetrical in structure for easy installation. The upper and lower baffles are respectively connected to the shielding plate assembly. Figure 6 .a. Figure 6 .b and Figure 6 .c, respectively, are the first shielding plate 18, the second shielding plate 19 and the third shielding plate 20, the three shielding plates form an arc, the first shielding plate 18 and the upper baffle plate 10 are fixedly connected together by the first pin 22, and the second shielding plate 19 and the third shielding plate 20 are connected to the side of the third deflection cylinder 7 by pins. Figure 5The first and second baffle plates are fixed to the third deflection cylinder 7 at one end by a pin. At the same time, the first baffle plate 18 is connected to the first connecting rod 8 by a spring 26 (dashed line part) on the inner side of the baffle plate assembly, and the second baffle plate 19 is connected to the second connecting rod 9 by a spring 26. The upper and lower third baffle plates 20 are respectively welded to the upper and lower baffles. The spring 26 provides tension so that the three baffles can fit tightly and have elastic deflection ability to control the opening and closing angles of the upper and lower baffles.

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

[0059] When the nozzle is in the S-bend super stealth mode, Fig. 9 As shown, at this time the nozzle is in an S-shape as a whole, completely shielding the high-temperature components of the engine, with a good stealth effect, while still retaining the vector adjustment capability in a single-axis direction.

[0060] Compared with the conventional binary vector nozzle, this embodiment adds an S-bend nozzle that can be variably formed into a fully shielded rearward direction, thus achieving a high stealth function. Compared with the S-bend nozzle in the prior art, this embodiment adds a binary vector adjustment capability. This embodiment simulates the movement of the head, neck and mouth of a snake, and realizes the transformation of the nozzle horizontal-S-bend configuration and the binary vector adjustment function through the first, second and third deflection cylinders and the nozzle simulating the snake's mouth.

[0061] The above embodiments are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A two-dimensional vector nozzle mechanism with adjustable S-bend imitating a snake head, characterized by: The invention comprises a first deflection cylinder (5), a second deflection cylinder (6), a third deflection cylinder (7) and a snake-like mouth nozzle which are movably connected in sequence, wherein the first deflection cylinder (5), the second deflection cylinder (6) and the third deflection cylinder (7) overlap and rotate in an articulated manner with arc-shaped cylinders on the side surfaces, and the arc-shaped cylinders are arranged alternately up and down, and are driven to rotate at an angle by a hydraulic actuator assembly to form a horizontal or snake-like S-bend; the snake-like mouth nozzle comprises baffles which are respectively movably articulated to the top and bottom edges of the opening of the third deflection cylinder (7); The upper and lower shielding plate components are curved inwards in an arc shape to imitate the upper and lower jaws of a snake head, and the bottoms thereof are fixedly connected to the corresponding baffles. The shielding plate components are driven by the hydraulic actuating components to drive the baffles to open and close up and down.

2. According to claim 1, the dual vector nozzle mechanism imitating the adjustable S-bend of the snake head is characterized by: The baffle plate comprises an upper baffle plate (10) and a lower baffle plate (13) which are respectively movably hinged to the open end of the third deflection cylinder (7); the hydraulic actuating assembly comprises a first hydraulic actuating cylinder (1), which is arranged between the first deflection cylinder (5) and the second deflection cylinder (6) to adjust the relative rotation angle; a second hydraulic actuating cylinder (2), which is located on the opposite side of the upper and lower sides of the first hydraulic actuating cylinder (2), and is arranged between the second deflection cylinder (6) and the third deflection cylinder (7) to adjust the relative rotation angle; a third hydraulic actuating cylinder (3) and a fourth hydraulic actuating cylinder (4) are symmetrically arranged on the top and bottom surfaces of the third deflection cylinder (7), and are correspondingly connected to the baffle plate assembly and the upper and lower baffles through a connecting rod assembly.

3. According to claim 2, the dual vector nozzle mechanism imitating the adjustable S-bend of the snake head is characterized by: The shielding plate assembly includes two shielding plates, which are symmetrically arranged in an upper and lower manner. A single shielding plate assembly includes a first shielding plate (18) and a second shielding plate (18) which are hinged on the third deflection cylinder (7) in an arc shape in sequence. The bottom edge of the third shielding plate (20) below the second shielding plate (18) is fixedly connected to the corresponding baffle plate, and one end of the third shielding plate (20) is connected to the connecting rod assembly through a plurality of springs (26), and the other end is respectively connected to the inner side of the first, second and third shielding plates, so that the first, second and third shielding plates are tightly fitted; and the shielding plate assembly is driven to move and drive the upper and lower baffle plates to open and close through the third and fourth hydraulic actuators and the connecting rod assembly.

4. According to claim 3, the dual vector nozzle mechanism imitating the adjustable S-bend of the snake head is characterized by: The connecting rod assembly comprises a first connecting rod (8) and a second connecting rod (9). The first connecting rod (8) is L-shaped, and the top end of the L-shaped angle is movably hinged on the third deflection cylinder (7). One end of the first connecting rod (8) is hinged to the third or fourth hydraulic cylinder, and the other end is hinged to the second connecting rod (9). The second connecting rod (9) is an obtuse angle with its opening facing inward, and 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. According to claim 4, the dual vector nozzle mechanism imitating a snake head and adjustable S-bend is characterized by: There are at least three springs (26) connecting a single baffle plate assembly, wherein two ends of a first spring (26) are respectively connected to the first connecting rod (8) and the inner wall of the first baffle plate (18), two ends of a second spring (26) are respectively connected to the second connecting rod (9) and the inner wall of the second baffle plate (19); and two ends of a third spring (26) are respectively connected to the second connecting rod (9) and the inner wall of the third baffle plate (20).

6. The snake-head-like adjustable S-bend binary vector nozzle mechanism according to claim 1 is characterized by: The arc-shaped cylinder between the first deflection cylinder (5) and the second deflection cylinder (6) is arranged at the bottom; and the arc-shaped cylinder between the second deflection cylinder (6) and the third deflection cylinder (7) is arranged at the top.

7. The two-dimensional vector nozzle mechanism with adjustable S-bend imitating a snake head according to any one of claims 1 to 6, characterized in that: The first deflection cylinder (5), the second deflection cylinder (6) and the third deflection cylinder (7) all have rectangular cross-sections.

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