S-bend double-flat type spray pipe device

Abstract

The invention relates to an S-bend double-flat type spray pipe device which comprises an S bend, an adjusting plate, an adjusting plate driving mechanism, a convergence plate and a side baffle. The S-shaped bend is an S-shaped double-flat spray pipe formed by connecting a circular ring inlet and a double-rectangular ring outlet through a sealing shell, and the central plane of the S-shaped bend coincides with the axis of the circular ring inlet; a bifurcated double-shell channel which is symmetrical and parallel to a central plane is arranged between the middle part of the S-bent sealing shell and an outlet of the double-rectangular ring; the adjusting plate, the convergence plate and the side baffle are symmetrically arranged at the outlet of the rectangular ring respectively; the adjusting plate driving mechanisms are arranged between the bifurcated double-shell channels in a bilateral symmetry mode. The driving structure is compact and good in sealing performance, the S bend, the convergence plate, the flow guide plate and the side baffles form a double-flat-type spray pipe channel, the thrust and direction of double-spray-pipe airflow are controlled through the adjusting plate, the flight speed, direction and rolling of the control-surface-free flying wing posture of an aircraft can be flexibly changed, the thrust of an engine can be improved, high-pressure airflow is prevented from generating vortex, and the service life of the aircraft is prolonged. And the stealth capability of the airplane is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation equipment, and in particular to an S-bend double-flat nozzle device. Background Art

[0002] The nozzle is an important component of an aircraft engine, used to expand and accelerate the high-temperature, high-pressure combustion gas after the turbine and discharge it from the fuselage, thereby generating engine thrust. The existing Laval nozzle and expansion adjustment plate are both necessary components in aircraft engines. The Laval nozzle and expansion adjustment plate are both axisymmetrically distributed, and are pipes that enable the airflow to be continuously accelerated. In order to achieve the control of the attitude of a rudderless flying wing, an aerodynamic thrust vector nozzle is designed to control the attitude of the aircraft. The current aerodynamic thrust vector nozzle mainly includes a binary vector nozzle and an axisymmetric vector nozzle. However, there are the following defects: 1) It cannot effectively shield high-temperature components, limiting the improvement of the aircraft's stealth performance; 2) It generates pitch and yaw moments through mechanical adjustment, causing the aircraft to pitch and yaw, but cannot generate rolling moments, and cannot cause the aircraft to roll.

[0003] Russian media reported that the next-generation engine to be equipped on the Su-57 fighter jet will feature a flat tail nozzle wall design. Currently, the Su-57 fighter jet's aircraft engine, the Product-30, was developed by the Saturn Research and Production Association, a subsidiary of the United Engine Corporation of Russia, in collaboration with several aviation companies. It is Russia's "royal engine" specifically developed for the Su-57. The S-bend nozzle structure associated with the engine shields the engine's hot surfaces, such as the turbine blades and center cone, thereby reducing the infrared radiation intensity of the combustion gases. Regarding radar scattering, the S-bend nozzle structure reduces the intensity of radar echoes received by single-station radars. This structural feature allows the S-bend nozzle to reduce the infrared and radar signature of the aircraft in the forward and rearward directions, making it a popular choice in stealth aircraft development. To date, S-bend stealth nozzles have been deployed in combat on a variety of foreign aircraft, including the B-2 strategic bomber, the X-47 unmanned combat aircraft, and the Neuron unmanned aerial vehicle. However, research on S-bend stealth nozzles in China is still in its infancy. How to improve the stealth of aircraft, increase nozzle thrust, simplify nozzle structure, and enhance the flexibility of speed changes and flight direction changes has always been the direction of continuous efforts of Chinese aircraft design and manufacturing companies.

[0004] At present, there are the following related invention patents: CN114687884B discloses an outer adjustment plate structure of a binary nozzle, which is connected to the outer side of the convergent adjustment plate and the divergent adjustment plate of the engine nozzle, and the outer adjustment plate structure of the binary nozzle follows the movement; CN114562381B discloses a short-range adjustable air bleed nozzle with a rotatable actuator; CN114019647B discloses an adjustable nozzle outer cover mechanism, which strives to be applied to a binary vector nozzle, follows the movement of the binary vector nozzle mechanism, and blocks the external flow path of the binary vector nozzle; CN113962039B discloses an integrated method for the design and manufacture of typical nozzle parts; CN106762219B discloses a new type of binary plug nozzle, which strives to achieve complete shielding of high-temperature components inside the engine and has good stealth capability; CN106321282B discloses a divergent nozzle with stealth function, which can enhance infrared stealth effect and radar stealth effect without changing the aircraft structure. CN113915027AB discloses a circular-to-square binary vector nozzle with a yaw function, striving to have high stealth, vectoring, yaw, and low weight functions, effectively meeting the use requirements of aircraft; CN113864078B discloses a high-stealth binary vector nozzle, striving to combine vectoring and strong stealth functions. CN113107705B discloses a double S-bend convergent-divergent nozzle with infrared suppression measures, which uses the airflow discharged from the cooling holes to improve the flow separation in the leeward area of ​​the double S-bend nozzle and increase the nozzle thrust. CN112610357B discloses an S-bend stealth nozzle with a cooling structure, which can reduce the infrared radiation of the exhaust system and enhance the stealth performance of the S-bend nozzle. CN112943481B discloses a mechanically adjustable S-bend nozzle nozzle structure, which can enhance the infrared stealth performance of the nozzle by shielding the high-temperature engine components through the S-bend section. CN105201685B discloses an S-bend dual-element nozzle with vector deflection, which overcomes the drawback of existing S-bend nozzles, which are non-adjustable. While these existing technologies have their own advantages, they still face pressing challenges in simplifying the nozzle structure, driving mechanism, and sealing, while enhancing speed and flight direction flexibility, while still improving aircraft stealth and nozzle thrust. Summary of the Invention

[0005] In response to the above problems, the purpose of the present invention is to provide an S-curved double-flat nozzle device, which has strong stealth capability, large engine thrust, prevention of vortex generation in high-pressure airflow, flexible change of the flight speed, direction and roll of the aircraft's rudderless flying wing posture, relatively simple and compact structure, good sealing of the drive mechanism, and low aircraft wind resistance.

[0006] The technical solution adopted in the present invention is as follows:

[0007] The present invention proposes an S-bend double-flat nozzle device, comprising an S-bend, an adjustment plate, an adjustment plate driving mechanism, a convergent plate and a side baffle; the S-bend is an S-shaped double-flat nozzle formed by connecting a circular ring inlet and a double rectangular ring outlet parallel to each other through a sealed shell, and its center plane coincides with the axis of the circular ring inlet; a bifurcated double-shell channel symmetrically parallel to the center plane is set between the middle of the sealed shell of the S-bend and the double rectangular ring outlet; the adjustment plates are symmetrically arranged at the upper and lower ends of the outer side of the rectangular ring outlet and perpendicular to the center plane of the S-bend; the convergent plates are a pair of symmetrical shapes An angular plate perpendicular to the center plane of the S-bend, each angular plate is a short flat plate and an oblique long plate folded into a rectangular plate with a width of the S-bend rectangular ring outlet at an angle of about 30°. It is fixedly connected to the upper and lower surfaces of the inner wall of the rectangular ring outlet through the short flat plate and is symmetrical with each other. Its outer oblique surface is equivalent to the high-temperature airflow ejected from the Laval nozzle pressurized S-bend, thereby enhancing the aircraft thrust and stealth capability; the side baffles are symmetrically arranged on the left and right sides of the rectangular ring outlet and are parallel to the center plane of the S-bend; the adjustment plate drive mechanism is symmetrically arranged between the bifurcated double shell channels and is respectively connected to the adjustment plates on both sides.

[0008] Furthermore, the adjustment plate driving mechanism includes a driving cylinder I, a driving cylinder II, a swing frame, a guide rod, a short shaft, a movable frame, a connecting rod, a long shaft and a slender shaft; the short shaft is fixedly connected between the middle parts of the inner and outer walls of the forked double-shell channel and is perpendicular to the center plane of the S-bend; the long shaft is respectively fixedly connected between the upper ends of the outer sides of the double rectangular ring outlets and between the lower ends of the outer sides of the double rectangular ring outlets; the slender shaft is respectively fixedly connected between the upper parts of the inner sides of the double rectangular ring outlets and between the lower parts of the inner sides of the double rectangular ring outlets; the long shaft and the slender shaft are both perpendicular to the center plane of the S-bend; one end of the driving cylinder I is rotatably connected to the upper front side of the S-bend, and the other end is rotatably connected to the upper front end of the swing frame; the rear end of the swing frame is rotatably connected to the short shaft; the movable frame is correspondingly arranged on the rear side of the swing frame and A slot corresponding to the rear end of the swing frame is provided in the middle part of the front side; the guide rods are respectively fixedly connected to the upper and lower sides of the swing frame and extend backward, and the guide rods are parallel to the center plane of the S-bend; the upper and lower sides of the movable frame are respectively slidably connected to the guide rods; the cylinder sleeve of the driving cylinder II is vertically fixedly connected to the upper front end of the swing frame, and its piston rod is rotatably connected to the movable frame after passing through the swing frame; the front end of the upper end adjusting plate is rotatably connected to the upper end long axis; the front end of the lower end adjusting plate is rotatably connected to the lower end long axis, and the upper end adjusting plate is symmetrical with the lower end adjusting plate; the inner inclined surface of the oblique long plate of the convergent plate is tangent to the slender axis; the upper and lower ends of the movable frame are respectively connected to the upper and lower adjusting plates by connecting rods; one end of the connecting rod is rotatably connected to the front end of the adjusting plate, and the other end is rotatably connected to the movable frame.

[0009] Furthermore, the driving cylinder I and the driving cylinder II are both conventional linear hydraulic cylinders.

[0010] Furthermore, the inner surface of the adjustment plate is provided with a guide plate; the front end of the guide plate is rotatably connected to the slender shaft, and the middle part is connected to the adjustment plate through an elastic pull rod group.

[0011] Furthermore, the elastic pull rod group includes a nut, a spring and a pull rod; the pull rod is arranged in sequence as a threaded column, a smooth rod and a sphere along the axial direction; a spherical groove is opened on the front side of the outer side surface of the adjustment plate; the pull rod passes through the adjustment plate and the guide plate in sequence through the spherical groove, the end sphere of the pull rod contacts the inner surface of the guide plate, the nut is spirally connected to the threaded column at the outer end of the pull rod, the spring is sleeved on the pull rod, and the two ends of the spring respectively rest on the concave spherical surface of the adjustment plate and the nut.

[0012] Furthermore, the guide plate is a rectangular thin long plate, and its width is the same as the width of the S-bend rectangular ring outlet.

[0013] Furthermore, a sealing cover is provided on the outside of the adjustment plate driving mechanism.

[0014] Furthermore, the front end of the side baffle is rectangular, and the rear end is trapezoidal or dovetail-shaped.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The S-bend, convergent plate, guide plate and side baffle form a double flat nozzle, which enhances the stealth capability of the aircraft, is equivalent to the existing Laval nozzle to increase engine thrust, and prevents vortexes from occurring in the high-pressure airflow.

[0017] 2. The dual adjustment plate drive mechanism drives the swing of the dual nozzle adjustment plates, controls the thrust and direction of the dual nozzle airflow, and flexibly changes the flight speed, direction and roll of the aircraft's rudderless flying wing attitude.

[0018] 3. The structure is relatively simple and compact, the driving mechanism is well sealed, and the aircraft has low wind resistance. This reduces the difficulty of control and manufacturing and reduces nozzle failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0020] Figure 2 A schematic diagram of a motion posture of the main cross-sectional structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0022] Figure 4 It is a side structural schematic diagram of the present invention.

[0023] Among them, the figure marks are: 1-S-bend; 2-driving cylinder I; 3-driving cylinder II; 4-swing frame; 5-guide rod; 6-short shaft; 7-moving frame; 8-connecting rod; 9-1-nut; 9-2-spring; 9-3-pull rod; 10-adjusting plate; 11-convergent plate; 12-guide plate; 13-side baffle; 14-long shaft; 15-slender shaft; 16-sealing cover. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0026] See attached Figure 1-4 The present invention proposes an S-bend double-flat nozzle device, which includes an S-bend 1, an adjustment plate 10, an adjustment plate driving mechanism, a convergent plate 11 and a side baffle 13.

[0027] Among them, the S-bend 1 is an S-shaped double-flat nozzle formed by mutually parallel circular ring inlet and double rectangular ring outlet connected by an S-shaped sealing shell, and the center plane of the S-bend 1 coincides with the axial centerline of the circular ring inlet; a forked double-shell channel symmetrically parallel to the center plane is set between the middle of the sealing shell of the S-bend 1 and the double rectangular ring outlet, that is, the cross-section of the S-shaped sealing shell is Y-shaped; the adjustment plates 10 are symmetrically arranged at the upper and lower ends of the outer sides of the two rectangular ring outlets and are perpendicular to the center plane of the S-bend 1; the convergence plates 11 are symmetrically arranged at the upper and lower ends of the inner sides of the two rectangular ring outlets and are perpendicular to the center plane of the S-bend; the side baffles 13 are symmetrically fixed on the left and right sides of the rear ends of the two rectangular ring outlets and are parallel to the center plane of the S-bend; the adjustment plate driving mechanism is provided with two groups, which are symmetrically arranged between the gaps of the forked double-shell channel and are connected to the upper and lower adjustment plates 10 on one side respectively.

[0028] Specifically, a through hole perpendicular to the center plane is provided at the front upper end of the outer wall of the sealing shell of the S-bend 1, and a through hole perpendicular to the center plane of the S-bend 1 is correspondingly provided in the middle of the inner outer wall of the forked double shell channel; through holes perpendicular to the center plane of the S-bend 1 are provided on the outside of the upper and lower ends of the double rectangular ring outlet, and small through holes perpendicular to the center plane of the S-bend 1 are respectively provided on the inside of the upper and lower ends of the double rectangular ring outlet.

[0029] The two upper and lower convergent plates 11 on each side are a pair of symmetrical angled plates perpendicular to the center plane of the S-bend 1. Each angled plate is composed of a short flat plate and an oblique long plate folded at an approximately 30° angle from a rectangular plate of the same width as the rectangular ring outlet. The short flat plates are fixed to corresponding locations on the inner wall of the rectangular ring outlet. The inner oblique surface of the long plate is tangent to the small through-hole corresponding to the rectangular ring outlet, and the outer oblique surface is equivalent to the high-temperature airflow ejected from the pressurized S-bend by the Laval nozzle, enhancing the aircraft's thrust and stealth capabilities. The baffle 13 is a long plate structure with a rectangular front end and a trapezoidal or dovetail rear end. Its width is the same as the height of the rectangular ring outlet of the S-bend 1.

[0030] Taking the adjustment plate driving mechanism on one side as an example, the adjustment plate driving mechanism includes a driving cylinder I2, a driving cylinder II3, a swing frame 4, a guide rod 5, a short shaft 6, a movable frame 7, a connecting rod 8, a long shaft 14 and a slender shaft 15; the short shaft 6 is fixedly connected between the middle parts of the inner and outer walls of the forked double-shell channel and is perpendicular to the center plane of the S-bend 1; the long shaft 14 is respectively fixedly connected between the upper ends of the outer sides of the double rectangular ring outlets and between the lower ends of the outer sides of the double rectangular ring outlets; the slender shaft 15 is respectively fixedly connected between the upper parts of the inner sides of the double rectangular ring outlets and between the lower parts of the inner sides of the double rectangular ring outlets; the long shaft 14 and the slender shaft 15 are both perpendicular to the center plane of the S-bend 1; one end of the driving cylinder I2 is rotatably connected to the upper part of the front side of the S-bend 1, and the other end is rotatably connected to the upper front end of the swing frame 4; the rear end of the swing frame 4 is rotatably connected to the short shaft 6; the movable frame 7 is correspondingly arranged on the swing frame The rear side and the middle part of the front side are provided with slots corresponding to the rear end of the swing frame 4; the guide rods 5 are respectively fixedly connected to the upper and lower sides of the swing frame 4 and extend backward, and the guide rods 5 are parallel to the center plane of the S-bend; the upper and lower sides of the movable frame 7 are respectively slidably connected to the guide rods 5; the cylinder sleeve of the driving cylinder II3 is vertically fixedly connected to the upper front end of the swing frame 4, and its piston rod is rotatably connected to the movable frame after passing through the swing frame; the front end of the upper end adjusting plate 10 is rotatably connected to the upper end long axis 14, and the front end of the lower end adjusting plate 10 is rotatably connected to the lower end long axis 14, and the upper end adjusting plate 10 and the lower end adjusting plate 10 are symmetrical with each other; the inner inclined surface of the oblique long plate of the convergent plate is tangent to the slender axis 15; the upper and lower ends of the movable frame 7 are respectively connected to the upper and lower adjusting plates 10 by connecting rods 8; one end of the connecting rod 8 is rotatably connected to the front end of the adjusting plate 10, and the other end is rotatably connected to the movable frame 7.

[0031] Wherein, the driving cylinder I2 and the driving cylinder II3 are both conventional linear hydraulic driving cylinders consisting of a cylinder sleeve and a piston rod.

[0032] Specifically, the swing frame 4 is a planar frame composed of a front upper rectangular crossbeam, a rectangular column fixedly connected to the bottom of the front upper rectangular crossbeam, and a right middle rectangular crossbeam fixedly connected to the middle of the rear side of the rectangular column. The rectangular column is provided with an upper through hole, a middle through hole and a lower through hole perpendicular to the side of the column, and the front end of the front upper crossbeam and the rear end of the right middle crossbeam are both provided with through holes vertical to the planar frame. The movable frame 7 is a planar frame composed of columns and a middle rear convex plate, and the upper end, upper middle part and lower end of the columns are provided with through holes perpendicular to the plane frame, and the columns are provided with upper through holes, lower through holes and middle slots perpendicular to the side of the columns; the upper and lower adjustment plates 10 on the corresponding side are a pair of rectangular plates with the same shape and symmetrical vertical to the center plane of the S-bend 1, and each right-angled plate is bent into a short vertical plate and a long rectangular conical panel perpendicular to each other by a rectangular plate with the same width as the rectangular ring outlet of the S-bend, and the inner and outer ends of the short vertical plate are respectively provided with through holes perpendicular to the side of the adjustment plate 10, and the outer conical surface of the long rectangular conical panel is provided with a concave spherical surface and a through hole of the center of the orthogonal spherical surface and its conical surface; the connecting rod 8 is an oblong flat plate, and through holes perpendicular to the oblong flat plate are provided at both ends.

[0033] A short shaft 6 is fixedly connected between the through holes in the middle of the inner and outer walls of the forked double-shell channel; a long shaft 14 is fixedly connected between the upper through hole and the lower through hole of the double rectangular ring outlet; a slender shaft 15 is fixedly connected between the upper small through hole and the lower small through hole of the double rectangular ring outlet; the front end of the driving cylinder 1 is rotatably connected to the front upper through hole of the outer wall of the S-bend 1 sealing shell, and the other end is rotatably connected to the front through hole of the front upper crossbeam of the swing frame 4 with a pin; the rear end through hole of the rear crossbeam of the swing frame 4 is rotatably connected to the short shaft 6, and the upper and lower through holes of the column are respectively fixed with guide rods 8, and the end of the rear crossbeam of the swing frame 4 is arranged in the middle slot of the movable frame 7; the movable frame 7 The upper and lower through holes in the middle of the column correspond to the two guide rods 8 for sliding connection respectively; the cylinder sleeve of the driving cylinder II3 is vertically fixed to the left side of the rectangular column of the swing frame 4, and its piston rod passes through the middle through hole of the rectangular column of the swing frame 4, and its protruding end is rotatably connected to the through hole in the upper and middle part of the column of the mobile frame 7 by a pin; the upper and lower adjustment plates 10 are symmetrically rotatably connected to the upper and lower long axes 14 through the through holes at the inner ends of their short vertical plates, and the through holes at the outer ends of the short vertical plates of the upper and lower adjustment plates 10 correspond to the through holes at one end of the two connecting rods 8 for rotational connection with pins; the through holes at the other ends of the two connecting rods 8 correspond to the through holes at the upper and lower ends of the column of the mobile frame 7 for rotational connection with pins.

[0034] The inner surface of the regulating plate 10 is provided with a guide plate 12 ; the front end of the guide plate 12 is rotatably connected to the slender shaft 15 , and the middle part is connected to the regulating plate 10 through an elastic pull rod group.

[0035] The guide plate 12 is a rectangular thin long plate, and its width is the same as the width of the S-bend rectangular ring outlet. A through hole is provided along the short side of its front end, and a through hole perpendicular to the guide plate 12 is provided in the middle.

[0036] The elastic pull rod group includes a nut 9-1, a spring 9-2 and a pull rod 9-3; the pull rod 9-3 is arranged in sequence along the axial direction as a threaded column, a smooth rod and a sphere; the pull rod 9-3 passes through the through hole of the conical surface of the adjustment plate 10 and the small through hole of the guide plate 12, the sphere at the inner end of the pull rod 9-3 contacts the inner surface of the guide plate 12, the nut 9-1 is spirally connected to the threaded column at the outer end of the pull rod 9-3, the spring 9-2 is sleeved on the pull rod 9-3, and the two ends of the spring 9-2 are respectively against the concave spherical surface of the adjustment plate 10 and the nut 9-1; the swinging adjustment plate 10 drives the guide plate 12 to rotate with it around the slender axis 15 through the elastic pull rod group, so as to prevent the high-pressure airflow ejected from the double flat nozzle channel from generating vortices.

[0037] In this embodiment, a sealing cover 16 is provided on the outside of the adjustment plate driving mechanism, and the driving cylinder I2, driving cylinder II3, swing frame 4, guide rod 5, short shaft 6, movable frame 7 and the front half of the connecting rod 8 are all located in the sealing cover 16.

[0038] The working principle of the present invention is as follows:

[0039] The S-bend 1 shields hot surfaces in aircraft engines, such as turbine blades and the center cone, thereby reducing the intensity of infrared radiation received by radar detectors from solid walls and enhancing the aircraft's stealth capabilities. The S-bend 1, along with the convergent plate 11, guide plate 12, and side baffles 13, forms a double-flat nozzle channel, forcing high-temperature airflow to generate high-pressure airflow within the S-bend cavity, accelerating the airflow to supersonic speeds at the exit. This reduces losses caused by incomplete airflow expansion, improves engine thrust, and prevents vortices from forming in the high-pressure airflow at the exit.

[0040] In the adjustment plate drive mechanism, the extension and retraction of drive cylinder I2 drives the swing frame 4 and movable frame 7 to swing synchronously. The extension and retraction of drive cylinder II3 drives movable frame 7 forward and backward relative to swing frame 4 along its guide rods 5. This, in turn, drives the upper and lower adjustment plates 10 to expand and contract via upper and lower connecting rods 8. The combined motion of the dual drive cylinders I2 and II3 on ​​both sides of the adjustment plate drive mechanism produces the following control results for the aircraft's rudderless flying wing attitude flight:

[0041] (1) When the dual drive cylinders I2 are locked and the dual drive cylinders II3 are retracted at the same time, the upper and lower adjustment plates 10 on both sides are driven to converge, and the aircraft accelerates to fly in a straight line; (2) When the dual drive cylinders I2 are locked and the dual drive cylinders II3 are extended at the same time, the upper and lower adjustment plates 10 on both sides are driven to expand, and the aircraft decelerates to fly in a straight line; (3) When the dual drive cylinders I2 are retracted at the same time and the dual drive cylinders II3 are locked, the upper and lower adjustment plates 10 on both sides are driven to swing upward, and the aircraft ascends; (4) When the dual drive cylinders I2 are extended at the same time and the dual drive cylinders II3 are locked, the upper and lower adjustment plates 10 on both sides are driven to swing downward, and the aircraft descends; (5) When the dual drive cylinders I2 are locked and the dual drive cylinders II3 are extended and retracted respectively, the upper and lower adjustment plates 10 on both sides are driven to converge and extend respectively, and the aircraft turns left and right; (6) When the dual drive cylinders I2 are extended and retracted respectively and the dual drive cylinders II3 are locked, the upper and lower adjustment plates 10 on both sides are driven to swing up and down respectively, and the aircraft rolls left and right.

[0042] Matters not fully described in the present invention are known in the art.

[0043] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An S-bend double-flat nozzle device, characterized by: The device includes an S-bend, an adjustment plate, an adjustment plate driving mechanism, a convergent plate and a side baffle; the S-bend is an S-shaped double-flat nozzle formed by connecting a circular ring inlet and a double rectangular ring outlet parallel to each other through a sealed shell, and its center plane coincides with the axis of the circular ring inlet; a bifurcated double-shell channel symmetrically parallel to the center plane is set between the middle of the sealed shell of the S-bend and the double rectangular ring outlet; the adjustment plates are symmetrically arranged at the upper and lower ends of the outer side of the rectangular ring outlet and are perpendicular to the center plane of the S-bend; the convergent plates are a pair of symmetrical vertical S-bend center planes. The angled plates on the surface are each a short flat plate and an oblique long plate folded into a rectangular plate with a width of the S-bend rectangular ring outlet at an angle of about 30°. The short flat plates are fixedly connected to the upper and lower surfaces of the inner wall of the rectangular ring outlet through the short flat plates and are symmetrical with each other. The outer oblique surface is equivalent to the high-temperature airflow ejected from the pressurized S-bend of the Laval nozzle, thereby enhancing the thrust and stealth capability of the aircraft. The side baffles are symmetrically arranged on the left and right sides of the rectangular ring outlet and are parallel to the center plane of the S-bend. The adjustment plate drive mechanism is symmetrically arranged between the bifurcated double-shell channels and is respectively connected to the adjustment plates on both sides.

2. The S-bend double-flat nozzle device according to claim 1, characterized in that: The adjusting plate driving mechanism includes a driving cylinder I, a driving cylinder II, a swing frame, a guide rod, a short shaft, a movable frame, a connecting rod, a long shaft and a slender shaft; the short shaft is fixedly connected between the middle parts of the inner and outer walls of the forked double-shell channel and is perpendicular to the center plane of the S-bend; the long shaft is respectively fixedly connected between the upper ends of the outer sides of the double rectangular ring outlets and between the lower ends of the outer sides of the double rectangular ring outlets; the slender shaft is respectively fixedly connected between the upper parts of the inner sides of the double rectangular ring outlets and between the lower parts of the inner sides of the double rectangular ring outlets; the long shaft and the slender shaft are both perpendicular to the center plane of the S-bend; one end of the driving cylinder I is rotatably connected to the upper part of the front side of the S-bend, and the other end is rotatably connected to the upper front end of the swing frame; the rear end of the swing frame is rotatably connected to the short shaft; the movable frame is correspondingly arranged on the rear side of the swing frame and the front side A slot corresponding to the rear end of the swing frame is provided in the middle; the guide rods are respectively fixedly connected to the upper and lower sides of the swing frame and extend backward, and the guide rods are parallel to the center plane of the S-bend; the upper and lower sides of the movable frame are respectively slidably connected to the guide rods; the cylinder sleeve of the driving cylinder II is vertically fixedly connected to the upper front end of the swing frame, and its piston rod is rotatably connected to the movable frame after passing through the swing frame; the front end of the upper end adjusting plate is rotatably connected to the upper end long axis; the front end of the lower end adjusting plate is rotatably connected to the lower end long axis, and the upper end adjusting plate is symmetrical with the lower end adjusting plate; the inner inclined surface of the oblique long plate of the convergent plate is tangent to the slender axis; the upper and lower ends of the movable frame are respectively connected to the upper and lower adjusting plates by connecting rods; one end of the connecting rod is rotatably connected to the front end of the adjusting plate, and the other end is rotatably connected to the movable frame.

3. The S-bend double-flat nozzle device according to claim 2, characterized in that: The driving cylinder I and the driving cylinder II are both conventional linear hydraulic cylinders.

4. The S-bend double-flat nozzle device according to claim 2, characterized in that: The inner plate surface of the adjustment plate is provided with a guide plate; the front end of the guide plate is rotatably connected to the slender shaft, and the middle part is connected to the adjustment plate through an elastic pull rod group.

5. The S-bend double-flat nozzle device according to claim 4, characterized in that: The elastic pull rod group includes a nut, a spring and a pull rod; the pull rod is arranged in sequence along the axial direction as a threaded column, a smooth rod and a sphere; a spherical groove is opened on the front side of the outer side surface of the adjustment plate; the pull rod passes through the adjustment plate and the guide plate in sequence through the spherical groove, the end sphere of the pull rod contacts the inner surface of the guide plate, the nut is spirally connected to the threaded column at the outer end of the pull rod, the spring is sleeved on the pull rod, and the two ends of the spring respectively rest on the concave spherical surface of the adjustment plate and the nut.

6. The S-bend double-flat nozzle device according to claim 4, characterized in that: The guide plate is a rectangular thin long plate, and its width is the same as the width of the S-bend rectangular ring outlet.

7. The S-bend double-flat nozzle device according to claim 1, characterized in that: A sealing cover is provided on the outside of the regulating plate driving mechanism.

8. The S-bend double-flat nozzle device according to claim 1, characterized in that: The front end of the side baffle is rectangular, and the rear end is trapezoidal or dovetail-shaped.

Images