Adjustable lobe thrust vectoring nozzle structure

Abstract

The invention belongs to the technical field of warplane tail nozzles, and particularly relates to an adjustable lobe vector nozzle structure which comprises an injection sleeve cylinder section, an injection sleeve convergence section, a main flow sleeve, a main nozzle lobe assembly arranged at the tail end of the main flow sleeve and a vector expansion assembly arranged at the tail end of the injection sleeve convergence section. The vector expansion assembly comprises a plurality of expansion adjusting pieces which are evenly distributed in the circumferential direction and cut to form a tail nozzle. According to the vector expansion assembly, the first baffle in the first shielding assembly can effectively adapt to gaps between the expansion adjusting pieces distributed in the circumferential direction and effectively shield the gaps between the expansion adjusting pieces; the second shielding assembly can effectively shield the hinged gaps between the expansion adjusting pieces and the tail end of the convergence section of the injection sleeve, and therefore it is guaranteed that the starting performance of an engine cannot be lost due to the gaps between the expansion adjusting pieces.

Description

Technical Field

[0001] The invention belongs to the technical field of fighter aircraft tail nozzles, and in particular relates to an adjustable lobe vector nozzle structure. Background Art

[0002] The patent with application number 202310125618.X discloses a nozzle structure with infrared stealth capability, which can effectively reduce the infrared radiation of the tail jet, is suitable for a wider speed variation range of the engine, and has good working performance.

[0003] At present, vector engine technology is a necessary technical means for high-performance aircraft with high maneuverability. The general axisymmetric vector nozzle realizes the function of vector adjustment by controlling the adjustment plate. During the large-angle adjustment process, the gap between the adjustment plates is large, which causes the loss of aerodynamic performance of the engine.

[0004] Based on the patent application number 202310125618.X, the present invention designs a vector adjustment method of an adjustment plate with good sealing performance to solve the above problems. Summary of the invention

[0005] Based on this, it is necessary to provide an adjustable lobe vector nozzle structure to address the problems existing in current fighter aircraft engines. The first baffle in the first shielding assembly of the vector expansion assembly in the present invention can effectively adapt to the gap between the circumferentially distributed expansion adjustment plates and effectively shield the gap between the expansion adjustment plates. At the same time, the second shielding assembly in the present invention can effectively shield the hinged gap between the expansion adjustment plate and the end of the convergent section of the ejector sleeve, thereby ensuring that the starting performance of the engine will not be lost due to the gap between the expansion adjustment plates.

[0006] In the present invention, the circumferentially evenly distributed expansion adjustment plate and the first shielding component hinged to the end of the convergent section of the ejector sleeve can achieve the nozzle size adjustment for axially ejecting the tail jet backward and the nozzle size adjustment for obliquely ejecting the tail jet backward under the drive of four circumferentially evenly distributed actuators, thereby achieving the purpose of vector adjustment.

[0007] The above purpose is achieved through the following technical solutions: An adjustable lobe vector nozzle structure comprises an ejector sleeve cylindrical section, an ejector sleeve convergent section, a mainstream sleeve, a main nozzle lobe assembly arranged at the tail end of the mainstream sleeve, and a vector expansion assembly arranged at the tail end of the ejector sleeve convergent section, wherein the vector expansion assembly comprises a plurality of expansion adjustment pieces evenly distributed in the circumference and cut to form a tail nozzle, all of the expansion adjustment pieces are driven by four actuators evenly distributed in the circumference to adjust the tail nozzle area and the tail jet direction, and a gap between adjacent expansion adjustment pieces is provided to cover the gap between the two. The first shielding component comprises a pendulum seat, the pendulum seat is hinged to the outer wall of the convergence section of the ejector sleeve through a second end rod, a sliding seat is slidably arranged in the pendulum seat, a swivel seat is arranged on the sliding seat, a swivel sleeve is rotatably arranged in the swivel seat, a first vortex spring is connected between the swivel sleeve and the swivel seat, an end shaft is arranged in the swivel sleeve, a first baffle is arranged at the end of the end shaft, the first baffle is located between the corresponding two expansion adjustment sheets, and a locking structure is arranged on the swivel seat to fix the end shaft and the swivel sleeve.

[0008] The tail end of the convergent section of the ejector sleeve is provided with a second shielding component for shielding the gap between the ejector sleeve and the expansion adjustment piece and the first baffle.

[0009] In one embodiment, a first end rod is provided at the front end of the expansion adjustment plate, the first end rod is hinged to the outer wall of the convergence section of the ejector sleeve, a first connecting rod is hinged on the first end rod, a second connecting rod is hinged on the front end of the first connecting rod, two third connecting rods parallel to each other are hinged on the second connecting rod, the other end of the third connecting rod is hinged to the outer wall of the cylindrical section of the ejector sleeve, a fourth connecting rod is ball-jointed at the front end of the second connecting rod, the front end of the fourth connecting rod is ball-jointed to a circular ring with a circular cross-section, the circular ring is ball-jointed to one end of the actuator, and the other end of the actuator is ball-jointed to the L-rod on the outside of the cylindrical section of the ejector sleeve.

[0010] In one of the embodiments, a spherical annular protrusion matching with the circular ring is provided on the cylindrical section of the ejection sleeve.

[0011] In one embodiment, the locking structure includes a locking screw, which is arranged in a threaded sleeve on the rotating sleeve, and the locking screw cooperates with a first slot on the end shaft. A second slot is provided on the wall of the rotating sleeve, and the second slot cooperates with a locking rod that moves radially along the end shaft in the rotating seat. A bolt is provided in the threaded hole on the wall of the rotating seat, and the hexagonal head at the end of the bolt cooperates with the hexagonal groove at the end of the locking screw. A ring plate is provided on the bolt, and the locking rod is connected to a lever that cooperates with the ring plate through a sliding rod.

[0012] In one of the embodiments, the second shielding assembly includes a plurality of second baffles evenly distributed circumferentially and a plurality of third baffles evenly distributed circumferentially and shielding the gaps between adjacent second baffles, the front end of the second baffle is hinged to the tail end of the convergent section of the ejection sleeve, a second vortex spring is connected between the second baffle and the convergent section of the ejection sleeve to enable the second baffle to resist the first baffle or the expansion adjustment plate, and a second vortex spring is connected between the third baffle and the convergent section of the ejection sleeve to enable the third baffle to resist the first baffle or the expansion adjustment plate.

[0013] The beneficial effects of the present invention are: 1. The first baffle in the first shielding assembly of the vector expansion assembly in the present invention can effectively adapt to the gaps between the circumferentially distributed expansion adjustment sheets and effectively shield the gaps between the expansion adjustment sheets. At the same time, the second shielding assembly in the present invention can effectively shield the hinged gap between the expansion adjustment sheet and the end of the convergent section of the ejector sleeve, thereby ensuring that the starting performance of the engine will not be lost due to the gaps between the expansion adjustment sheets.

[0014] 2. In the present invention, the circumferentially evenly distributed expansion adjustment plate and the first shielding assembly hinged to the end of the convergent section of the ejector sleeve can realize the nozzle size adjustment for axially ejecting the tail jet backward and the nozzle size adjustment for obliquely ejecting the tail jet backward under the drive of four circumferentially evenly distributed actuators, thereby achieving the purpose of vector adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 is an overall cross-sectional view of the present invention; Figure 3 It is a cross-sectional view of the cooperation between the ejector sleeve, the mainstream sleeve and the main nozzle lobe assembly; Figure 4 This is a cross-sectional view of the cooperation between the mainstream sleeve and the nozzle lobe assembly; Figure 5 It is a cross-sectional view of the coordination between the vector expansion assembly and the main nozzle lobe assembly; Figure 6 It is a partial cross-sectional view of the coordination between the vector expansion assembly and the main nozzle lobe assembly; Figure 7 is a cross-sectional view of the distribution of expansion adjustment pieces in the vector expansion component; Figure 8 It is a sectional view of the layout of the expansion adjustment piece in the vector expansion component, that is, the second baffle and the third baffle in the second shielding component; Fig. 9 is a cross-sectional view of a vector expansion component; Fig.10 is a schematic diagram of a first shielding component; Fig.11is a cross-sectional view of a transfer sleeve in a first shielding assembly; Fig.12 is a schematic diagram of the middle end axis of the first shielding component; Fig.13 Schematic diagram of three adjustment states of the expansion adjustment piece; Name of the label in the figure: 101, cylindrical section of ejector sleeve; 102, convergent section of ejector sleeve; 103, mainstream sleeve; 200. Main nozzle lobe assembly; 300, vector expansion assembly; 301, expansion adjustment sheet; 302, first end rod; 303, first connecting rod; 304, second connecting rod; 305, third connecting rod; 306, fourth connecting rod; 307, circular ring; 308, actuator; 309, L rod; 310, first shielding assembly; 311, first baffle plate; 312, end shaft; 313, first clamping groove; 314, rotating sleeve; 315, second clamping groove; 316, screw sleeve; 317, first vortex spring; 318, rotating seat; 319, locking screw; 320, bolt; 321, ring plate; 322, lever; 323, slide rod; 324, locking rod; 325, slide seat; 326, swing seat; 327, second end rod; 328, annular protrusion; 329, locking structure; 400, second shielding assembly; 401, second baffle; 402, third baffle; 403, second vortex spring. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0018] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0019] like Figure 1-12 As shown, an adjustable lobe vector nozzle structure includes an ejector sleeve cylindrical section 101, an ejector sleeve convergent section 102, a mainstream sleeve 103, a main nozzle lobe assembly 200 arranged at the tail end of the mainstream sleeve 103, and a vector expansion assembly 300 arranged at the tail end of the ejector sleeve convergent section 102, wherein the vector expansion assembly 300 includes a plurality of expansion adjustment pieces 301 uniformly distributed in the circumferential direction to form a tail nozzle, and all the expansion adjustment pieces 301 are driven by four actuators 308 uniformly distributed in the circumferential direction to adjust the tail nozzle area and the tail jet direction, and a first shielding assembly 310 is arranged between adjacent expansion adjustment pieces 301 to shield the gap between the two, and the first shielding assembly Component 310 includes a pendulum seat 326, which is hinged to the outer wall of the convergent section 102 of the ejector sleeve through a second end rod 327. A slide seat 325 is slidably arranged in the pendulum seat 326, a swivel seat 318 is arranged on the slide seat 325, a swivel sleeve 314 is rotatably arranged in the swivel seat 318, a first vortex spring 317 is connected between the swivel sleeve 314 and the swivel seat 318, an end shaft 312 is arranged in the swivel sleeve 314, a first baffle plate 311 is arranged at the end of the end shaft 312, and the first baffle plate 311 is located between the corresponding two expansion adjustment plates 301, and a locking structure 329 is arranged on the swivel seat 318 to fix the end shaft 312 and the swivel sleeve 314.

[0020] A second shielding component 400 is disposed at the tail end of the convergent section 102 of the ejector sleeve to shield the gap between the convergent section 102 and the expansion adjustment piece 301 and the first baffle 311 .

[0021] In a further embodiment, Figure 5 , 6As shown, the front end of the expansion adjustment piece 301 is provided with a first end rod 302, the first end rod 302 is hinged to the outer wall of the convergent section 102 of the ejection sleeve, the first end rod 302 is hinged with a first connecting rod 303, the front end of the first connecting rod 303 is hinged with a second connecting rod 304, the second connecting rod 304 is hinged with two third connecting rods 305 parallel to each other, the other end of the third connecting rod 305 is hinged to the outer wall of the cylindrical section 101 of the ejection sleeve, the front end of the second connecting rod 304 is ball-jointed with a fourth connecting rod 306, the front end of the fourth connecting rod 306 is ball-jointed with a circular ring 307 with a circular cross-section, the circular ring 307 is ball-jointed with one end of an actuator 308, and the other end of the actuator 308 is ball-jointed with an L-rod 309 on the outside of the cylindrical section 101 of the ejection sleeve.

[0022] In a further embodiment, Figure 1 , 2 As shown in Figure 5, a spherical annular protrusion 328 that cooperates with the circular ring 307 is provided on the cylindrical section of the ejection sleeve.

[0023] In a further embodiment, Fig. 9 As shown, the locking structure 329 includes a locking screw 319, which is arranged in a threaded sleeve 316 on a rotating sleeve 314, and the locking screw 319 cooperates with a first slot 313 on the end shaft 312. A second slot 315 is provided on the wall surface of the rotating sleeve 314, and the second slot 315 cooperates with a locking rod 324 that moves radially along the end shaft 312 in a rotating seat 318. A bolt 320 is provided in the threaded hole on the wall surface of the rotating seat 318, and a hexagonal head at the end of the bolt 320 cooperates with an inner hexagonal groove at the end of the locking screw 319. A ring plate 321 is provided on the bolt 320, and the locking rod 324 is connected to a lever 322 that cooperates with the ring plate 321 through a sliding rod 323.

[0024] In a further embodiment, Figure 5 , 6 As shown in Figures 8 and 9, the second shielding assembly 400 includes a plurality of second baffles 401 uniformly distributed circumferentially and a plurality of third baffles 402 uniformly distributed circumferentially and shielding the gaps between adjacent second baffles 401, the front end of the second baffle 401 is hinged to the rear end of the convergent section 102 of the ejection sleeve, a second vortex spring 403 is connected between the second baffle 401 and the convergent section 102 of the ejection sleeve to enable the second baffle 401 to resist the first baffle 311 or the expansion adjustment sheet 301, and a second vortex spring 403 is connected between the third baffle 402 and the convergent section 102 of the ejection sleeve to enable the third baffle 402 to resist the first baffle 311 or the expansion adjustment sheet 301.

[0025] The first baffle 311 in the first shielding assembly 310 of the vector expansion assembly 300 of the present invention can effectively adapt to the gap between the circumferentially distributed expansion adjustment pieces 301 and effectively shield the gap between the expansion adjustment pieces 301. At the same time, the second shielding assembly 400 of the present invention can effectively shield the hinged gap between the expansion adjustment piece 301 and the end of the convergent section 102 of the ejector sleeve, thereby ensuring that the starting performance of the engine will not be lost due to the gap between the expansion adjustment pieces 301. The circumferentially uniformly distributed expansion adjustment piece 301 and the first shielding assembly 310 hinged to the end of the convergent section 102 of the ejector sleeve of the present invention can be driven by four circumferentially uniformly distributed actuators 308 to achieve the nozzle size adjustment for axially backward injection of the tail jet and the nozzle size adjustment for obliquely backward injection of the tail jet, thereby achieving the purpose of vector adjustment.

[0026] The main nozzle lobe assembly 200 of the present invention can adjust the outlet area of ​​the mainstream airflow and improve the mixing efficiency of the mainstream airflow and the cold air.

[0027] Under different flight conditions, the main nozzle lobe assembly 200 at the tail of the mainstream sleeve 103 can be adjusted to change the outlet area of ​​the mainstream airflow, ensuring that the mainstream thrust speed reaches 1 Mach at the trailing edge of the main nozzle lobe assembly 200. The vector expansion assembly 300 at the convergent section 102 of the ejector sleeve is driven by four actuators 308 to adjust the tail jet outlet.

[0028] For different flight conditions, the ideal areas of the mainstream outlet of the main nozzle lobe assembly 200 and the tail jet outlet of the vector expansion assembly 300 can be determined according to the flight conditions to achieve better mixing effect and lower aerodynamic loss.

[0029] like Fig.13 As shown, the adjustment process of the expansion adjustment piece 301 is as follows: The four actuator cylinders 308 are started, and the actuator cylinders 308 drive the expansion adjustment plate 301 to swing through the ring 307, the fourth connecting rod 306, the second connecting rod 304, the third connecting rod 305, and the first connecting rod 303. The ring 307 is driven by the four actuator cylinders 308 with different extension and contraction degrees to swing at corresponding angles on the spherical surface of the annular protrusion 328, so that all the expansion adjustment plates 301 swing as required, thereby realizing vector adjustment of the tail jet.

[0030] During the swinging of the expansion adjustment sheet 301, the first baffle plate 311 in the first shielding assembly 310 is abutted against the corresponding two expansion adjustment sheets 301 under the action of the corresponding first vortex spring 317 and effectively shields the gap between the two adjacent expansion adjustment sheets 301. At the same time, the slide seat 325 will drive the first baffle plate 311 to make corresponding position adjustments to ensure that the first baffle plate 311 effectively shields the gap between the expansion adjustment sheets 301 and ensures that the starting performance is not affected.

[0031] The installation process of the first baffle 311 in the first shielding assembly 310 on the rotating seat 318 in the present invention is as follows: In the initial state, the locking rod 324 is inserted into the second slot 315, so that the rotating sleeve 314 and the rotating seat 318 are integrated and the locking screw 319 in the screw sleeve 316 is just opposite to the bolt 320, the locking screw 319 is not inserted into the rotating sleeve 314, the first vortex spring 317 is in a compressed energy storage state, there is a gap between the ring plate 321 on the bolt 320 and the lever 322, and the end of the bolt 320 is not inserted into the screw sleeve 316.

[0032] When the first baffle plate 311 needs to be installed on the rotating seat 318, the end shaft 312 is inserted into the rotating sleeve 314 and the first slot 313 is opposite to the locking screw 319. Then, the bolt 320 is rotated so that the hexagonal head at the end of the bolt 320 is inserted into the hexagonal slot at the end of the locking screw 319. The bolt 320 is continued to be rotated, and the bolt 320 drives the locking screw 319 to be screwed into the first slot 313 and finally completes the locking of the rotating sleeve 314 and the end shaft 312. When the locking screw 319 enters the first slot 313, the ring plate 321 on the bolt 320 passes through The lever 322 and the slide bar 323 drive the locking rod 324 to gradually disengage from the second slot 315. When the locking screw 319 abuts against the bottom of the first slot 313, the locking rod 324 has completely disengaged from the second slot 315 and unlocks the lock between the rotating sleeve 314 and the rotating seat 318. Under the action of the first vortex spring 317, the rotating sleeve 314 drives the first baffle plate 311 to swing through the locking screw 319 and the end shaft 312, so that the two sides of the first baffle plate 311 respectively abut against the corresponding two expansion adjustment plates 301, thereby ensuring that the first baffle plate 311 blocks the gap of the expansion adjustment plate 301.

[0033] The second baffle 401 and the third baffle 402 in the second shielding assembly 400 are always in contact with the first baffle 311 or the expansion adjustment plate 301 under the action of the corresponding second vortex spring 403, and effectively shield the gap between the first baffle 311 or the expansion adjustment plate 301 and the convergent section 102 of the ejector sleeve.

Claims

1. An adjustable lobe vector nozzle structure, comprising an ejector sleeve cylindrical section, an ejector sleeve convergent section, a mainstream sleeve, a main nozzle lobe assembly arranged at the tail end of the mainstream sleeve, and a vector expansion assembly arranged at the tail end of the ejector sleeve convergent section, characterized in that: The vector expansion component includes a plurality of expansion adjustment pieces uniformly distributed circumferentially to form a tail nozzle, all of the expansion adjustment pieces are driven by four actuators uniformly distributed circumferentially to adjust the tail nozzle area and the tail jet direction, a first shielding component is provided between adjacent expansion adjustment pieces to shield the gap therebetween, the first shielding component includes a swing seat, the swing seat is hinged to the outer wall of the convergent section of the ejector sleeve through a second end rod, a sliding seat is slidably provided in the swing seat, a rotating seat is provided on the sliding seat, a rotating sleeve is rotatably provided in the rotating seat, a first vortex spring is connected between the rotating sleeve and the rotating seat, an end shaft is provided in the rotating sleeve, a first baffle is provided at the end of the end shaft, the first baffle is located between the corresponding two expansion adjustment pieces, and a locking structure for fixing the end shaft and the rotating sleeve is provided on the rotating seat; The tail end of the convergent section of the ejector sleeve is provided with a second shielding component for shielding the gap between the ejector sleeve and the expansion adjustment piece and the first baffle.

2. The adjustable lobe vector nozzle structure according to claim 1, characterized in that: A first end rod is provided at the front end of the expansion adjustment plate, and the first end rod is hinged to the outer wall of the convergence section of the ejection sleeve, and a first connecting rod is hinged on the first end rod, and a second connecting rod is hinged on the front end of the first connecting rod, and two third connecting rods parallel to each other are hinged on the second connecting rod, and the other end of the third connecting rod is hinged to the outer wall of the cylindrical section of the ejection sleeve, and a fourth connecting rod is ball-jointed at the front end of the second connecting rod, and the front end of the fourth connecting rod is ball-jointed with a circular ring with a circular cross-section, and the circular ring is ball-jointed with one end of the actuator, and the other end of the actuator is ball-jointed with the L-rod on the outside of the cylindrical section of the ejection sleeve.

3. The adjustable lobe vector nozzle structure according to claim 2, characterized in that: A spherical annular protrusion matched with the circular ring is arranged on the cylindrical section of the ejection sleeve.

4. The adjustable lobe vector nozzle structure according to claim 1, characterized in that: The locking structure includes a locking screw, which is arranged in a threaded sleeve on the rotating sleeve, and the locking screw cooperates with a first slot on the end shaft. A second slot is opened on the wall surface of the rotating sleeve, and the second slot cooperates with a locking rod that moves radially along the end shaft in the rotating seat. A bolt is arranged in the threaded hole on the wall surface of the rotating seat, and the hexagonal head at the end of the bolt cooperates with the hexagonal groove at the end of the locking screw. A ring plate is arranged on the bolt, and the locking rod is connected to a lever that cooperates with the ring plate through a sliding rod.

5. The adjustable lobe vector nozzle structure according to claim 1, characterized in that: The second shielding assembly includes a plurality of second baffles evenly distributed circumferentially and a plurality of third baffles evenly distributed circumferentially and shielding the gaps between adjacent second baffles. The front end of the second baffle is hinged to the rear end of the convergent section of the ejection sleeve. A second vortex spring is connected between the second baffle and the convergent section of the ejection sleeve to allow the second baffle to resist the first baffle or the expansion adjustment plate. A second vortex spring is connected between the third baffle and the convergent section of the ejection sleeve to allow the third baffle to resist the first baffle or the expansion adjustment plate.

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