Swing spray pipe mechanism and engine

Abstract

The invention relates to the technical field of engine control and discloses a swing spray pipe mechanism and an engine, the swing spray pipe mechanism comprises a power structure, a worm, a turbine, a lead screw, a nut and a sliding block which are sequentially connected, one end of a connecting rod is rotationally connected with the sliding block, and the other end of the connecting rod is in spherical fit connection with a swing body; the sliding block is slidably connected to the guide rail along a straight line. The swing spray pipe mechanism is suitable for enabling the nut to drive the sliding block to linearly slide along the guide rail when the lead screw rotates, and further driving the swing body to swing through the connecting rod. The worm and gear transmission has the advantages of high precision, large transmission ratio, good self-locking performance and the like, and is applied to the swing spray pipe mechanism to solve the problems of large frictional resistance, large driving structure power, large size, high energy consumption, large weight and the like in an existing swing spray pipe mechanism; through reasonable design of parameters and structures of the worm gear and the worm, accurate control of the swinging body is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of engine control, and particularly to a swing nozzle mechanism and an engine. Background Art

[0002] With the development of aerospace technology, the performance requirements for rocket engines are also getting higher and higher. At present, the core research directions for rocket engines at home and abroad include: controllable power technology and attitude control technology. The controllable power technology includes: rocket engine thrust vector control technology; the attitude control technology includes: rocket attitude and orbit control technology, and the rocket attitude and orbit control technology mainly relies on a separate attitude and orbit control system to control liquid rocket engines. The swing nozzle technology that has emerged in recent years significantly reduces the pressure of the attitude and orbit control system, resulting in a greater degree of improvement in the maneuverability of rockets and missiles. The swing nozzle technology is a technology that controls the flight direction of rockets and missiles by changing the direction of the engine exhaust gas flow.

[0003] In many technical fields such as aerospace and industrial automation, the swing nozzle technology plays a crucial role. As a key technology that can change the exhaust direction and thus control the thrust direction, the swing nozzle technology is widely used in rocket engines and missile propulsion systems.

[0004] The existing swing nozzle mechanism generally includes: a driving structure, a movable body, and a fixed body; the movable body and the fixed body are connected by a spherical surface fit; the driving structure drives the movable body to perform a full-axis swing around the swing center of the sphere. However, since the mating spherical surface between the movable body and the fixed body needs to simultaneously bear the dual functions of sealing and bearing loads, it significantly increases the frictional resistance between the movable body and the fixed body. In order to overcome the above frictional resistance and achieve the normal swing function of the swing nozzle mechanism, it is generally necessary to increase the power and volume of the driving structure, significantly increasing energy consumption; and increasing the weight and occupied space of the driving structure, which is extremely disadvantageous for application scenarios such as missiles or small aircraft with strict weight and space restrictions. Summary of the Invention

[0005] In view of this, the present invention provides a swing nozzle mechanism to solve the problem that for the existing swing nozzle mechanism, due to the extremely large frictional resistance between the movable body and the fixed body, the power and volume of the driving structure increase, the energy consumption increases, and the weight increases; it is extremely disadvantageous for application scenarios such as missiles or small aircraft with strict weight and space restrictions.

[0006] In a first aspect, the present invention provides a swing nozzle mechanism for swinging a swing body on an engine, and the swing nozzle mechanism includes:

[0007] A power structure adapted to provide rotational power;

[0008] Worm, connected to the power structure, and the worm is adapted to rotate as the power structure rotates;

[0009] Turbo, connected to the worm, and the turbo is adapted to rotate as the worm rotates;

[0010] Lead screw, connected to the turbo, and the lead screw is adapted to rotate as the turbo rotates;

[0011] Nut, threadedly connected to the lead screw;

[0012] Slider, fixedly connected to the nut;

[0013] Connecting rod, one end of which is rotatably connected to the slider, and the other end of the connecting rod is in spherical mating connection with the swing body;

[0014] Guide rail, the slider is slidably connected to the guide rail in a straight line;

[0015] The swing nozzle mechanism is adapted to, when the lead screw rotates, the nut drives the slider to slide linearly along the guide rail, and then drives the swing body to swing through the connecting rod. Beneficial effects: By adopting the above technical solution, the present application applies the worm and gear transmission method with the advantages of high precision, large transmission ratio and good self-locking property to the swing nozzle mechanism to overcome the problems of large frictional resistance, large power of the drive structure, large volume, high energy consumption and large weight existing in the existing swing nozzle mechanism; by reasonably designing the parameters and structure of the worm and gear, precise control of the swing body can be achieved, so that the swing body can achieve stable and precise swing with a small driving power. The swing nozzle mechanism of the present application has more precise control ability, faster response speed and higher reliability. At the same time, the self-locking characteristic of the worm and gear transmission can effectively prevent the accidental swing of the swing body in the non-working state, thereby improving the safety and reliability of the swing nozzle mechanism. Moreover, the guide rail is used to guide the slider to achieve the reliability and high precision of the swing nozzle mechanism.

[0016] Optionally, the power structure is a motor.

[0017] Optionally, the motor is a vacuum motor. Beneficial effects: By adopting the above technical solution, the vacuum motor can be used in variable environments and has the advantages of fast response speed and high rotational speed, so that the swing nozzle mechanism has a fast response speed.

[0018] Optionally, the power structure is connected to the worm through a coupling; the coupling is a diaphragm coupling. Beneficial effects: By adopting the above technical solution, a fine adjustment can be made to the connection between the power structure and the worm through the diaphragm coupling.

[0019] Optionally, it further includes:

[0020] A grating scale, adapted to obtain the position of the slider in real time;

[0021] A support, on which the power structure and the guide rail are both fixed. Beneficial effects: By adopting the above technical solution, the present application can, by setting a grating scale, feedback the position of the slider in real time, perform fine adjustment on the swing body, and achieve high-precision control of the swing angle of the swing body.

[0022] Optionally, the grating scale includes:

[0023] A scale, arranged on the support;

[0024] A reading head, arranged on the slider, and the reading head is adapted to cooperate with the scale to obtain the position of the slider in real time.

[0025] Optionally, it further includes:

[0026] A controller, which is signal-connected to the reading head and the power structure. The controller is adapted to compare the preset position information with the position information of the slider obtained by the reading head, and adjust the swing angle of the swing body by controlling the rotation direction and angle of the power structure.

[0027] In a second aspect, the present invention further provides an engine, including:

[0028] A combustion chamber;

[0029] A fixed body, which is hermetically and fixedly connected to the combustion chamber; an internal passage provided in the fixed body is communicated with the inside of the combustion chamber;

[0030] A swing body, which is in spherical fit connection with the fixed body, and an internal passage provided in the swing body is communicated with the internal passage of the fixed body;

[0031] At least three swing nozzle mechanisms evenly arranged around the outer periphery of the swing body. Beneficial effects: By adopting the above technical solution, the present application can precisely control the swing of the swing body by using the swing nozzle mechanism, improve the control performance of the engine, and further improve the maneuverability and flight efficiency of the aircraft using the engine of the present application.

[0032] Optionally, the fixed body and the combustion chamber are connected by a flange, and a trapezoidal sealing groove is provided between the fixed body and the combustion chamber, and a trapezoidal sealing structure is provided in the trapezoidal sealing groove. Beneficial effects: By adopting the above technical solution, the connection strength and airtightness are ensured.

[0033] Optionally, it further includes:

[0034] A cabin section, connected to the combustion chamber, the inside of the cabin section is hollow, and the fixed body, the swing body and the swing nozzle mechanism are all arranged inside the cabin section. Brief Description of the Drawings

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the engine provided in the embodiment of the present invention;

[0037] Figure 2 It is a partial three-dimensional structural schematic diagram of the engine provided in the embodiment of the present invention;

[0038] Figure 3 It is a cross-sectional structural schematic diagram of the swing nozzle mechanism provided in the embodiment of the present invention;

[0039] Figure 4 It is a partial three-dimensional structural schematic diagram of the swing nozzle mechanism provided in the embodiment of the present invention.

[0040] Description of the Reference Numerals:

[0041] 1, Combustion chamber; 2, Cabin section; 3, Swing body; 4, Fixed body; 5, Turbine; 6, Worm; 7, Lead screw; 8, Nut; 9, Slide block; 10, Link rod; 11, Power structure; 12, Coupling; 13, Guide rail; 14, Grating scale; 15, Support. Specific Embodiments

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0043] As Figures 3 to 4 shown in a specific embodiment of the swing nozzle mechanism, it includes: a power structure 11, a worm 6, a turbine 5, a lead screw 7, a nut 8, a slide block 9, a link rod 10, and a guide rail 13. The swing nozzle mechanism described in this application is used to swing the swing body 3 on the engine. Specifically, the lead screw 7 is a trapezoidal lead screw. The worm 6 is a high-precision worm, and the turbine 5 is a high-precision turbine.

[0044] As Figure 3 and Figure 4As shown, the power structure 11 is adapted to provide rotational power. Specifically, the power structure 11 is a motor, the motor is a vacuum motor, and the vacuum motor is a servo vacuum motor. The worm 6 is connected to the power structure 11, and the worm 6 is adapted to rotate with the rotation of the power structure 11. Specifically, the power structure 11 is connected to the worm 6 through a coupling 12, and the coupling 12 is a diaphragm coupling. The turbine 5 is connected to the worm 6, and the turbine 5 is adapted to rotate with the rotation of the worm 6. The lead screw 7 is connected to the turbine 5, and the lead screw 7 is adapted to rotate with the rotation of the turbine 5. The nut 8 is threadedly connected to the lead screw 7. The slider 9 is fixedly connected to the nut 8. One end of the connecting rod 10 is rotatably connected to the slider 9, and the other end of the connecting rod 10 is connected to the swing body 3 in a spherical mating connection. By setting the spherical mating connection, the freedom of full-axis swing of the swing body 3 is ensured, and the swing of the swing body 3 at various angles is realized. Specifically, the other end of the connecting rod 10 is connected to the swing body 3 through a spherical bearing. When the slider 9 moves linearly, it drives the connecting rod 10 to rotate, and the spatial position of the spherical bearing changes, realizing the swing of the swing body 3. The slider 9 is slidably connected to the guide rail 13 in a straight line, and the guide rail 13 plays a role in guiding the slider 9 linearly. Further, the slider 9 can be set as a first slider and a second slider fixedly connected. The first slider is fixedly connected to the nut 8 and is rotatably connected to one end of the connecting rod 10. The second slider is slidably connected to the guide rail 13. The swing nozzle mechanism is adapted to, when the lead screw 7 rotates, the nut 8 drives the slider 9 to slide linearly along the guide rail 13, and then drives the swing body 3 to swing through the connecting rod 10. Further, as Figure 3 shown, a plurality of the guide rails 13 are arranged in parallel to ensure reliable linear movement of the slider 9. The second sliders are multiple corresponding to the multiple guide rails 13 to reduce the processing difficulty and weight of the slider 9.

[0045] As Figure 3 shown, the swing nozzle mechanism of the present application further includes: a grating ruler 14 and a support 15. The grating ruler 14 is adapted to obtain the position of the slider 9 in real time. Both the power structure 11 and the guide rail 13 are fixed on the support 15, and the power structure 11 is connected to the support 15 through a flange and bolts.

[0046] Specifically, the grating ruler 14 includes: a scale and a reading head. The scale is arranged on the support 15. The reading head is arranged on the slider 9, and the reading head is adapted to cooperate with the scale to obtain the position of the slider 9 in real time.

[0047] The swing nozzle mechanism described in this application further includes: a controller, which is signal-connected to the reading head and the power structure. The controller is adapted to compare the preset position information with the position information of the slider 9 obtained by the reading head, and precisely adjust the swing angle of the swing body 3 by controlling the rotation direction and angle of the power structure 11.

[0048] As Figure 1 and Figure 2 As shown, this application also provides an engine, including: a combustion chamber 1, a fixed body 4, a swing body 3, and at least three of the swing nozzle mechanisms arranged evenly around the outer periphery of the swing body 3. Specifically, the engine is a rocket engine or a missile engine, and the rocket engine can be a solid rocket engine. The engine can also be used in an aircraft, especially a small aircraft. The engine described in this application may include: three swing nozzle mechanisms; the three swing nozzle mechanisms are installed at an angle of 120° to each other and work together to achieve the swing of the swing body 3 at any angle, that is, to achieve the omnidirectional swing of the swing body 3. The three power structures 11 rotate to drive the swing body 3 to swing in all directions around a point on the engine axis, and at the same time provide lateral forces in all directions for the swing body 3.

[0049] The fixed body 4 is hermetically and fixedly connected to the combustion chamber 1; specifically, the fixed body 4 and the combustion chamber 1 are connected by a flange, and a trapezoidal sealing groove is provided between the fixed body 4 and the combustion chamber 1, and a trapezoidal sealing structure is provided in the trapezoidal sealing groove.

[0050] The internal channel provided in the fixed body 4 is communicated with the inside of the combustion chamber 1. The swing body 3 and the fixed body 4 are connected by a spherical fit, and the internal channel provided in the swing body 3 is communicated with the internal channel of the fixed body 4.

[0051] The engine described in this application further includes: a cabin section 2, which is connected to the combustion chamber 1. The inside of the cabin section 2 is hollow, and the fixed body 4, the swing body 3, and the swing nozzle mechanism are all arranged inside the cabin section 2. The support 15 can be fixedly arranged on the inner wall of the cabin section 2.

[0052] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A swing nozzle mechanism for swinging a swing body (3) on a swing engine, characterized in that: include: A power structure (11) adapted to provide rotational power; A worm (6) connected to the power structure (11), wherein the worm (6) is adapted to rotate along with the rotation of the power structure (11); a turbine (5) connected to the worm (6), wherein the turbine (5) is adapted to rotate along with the rotation of the worm (6); A lead screw (7) connected to the turbine (5), wherein the lead screw (7) is adapted to rotate along with the rotation of the turbine (5); A nut (8) threadedly connected to the lead screw (7); A slider (9) fixedly connected to the nut (8); A connecting rod (10), one end of which is rotatably connected to the slider (9), and the other end of which is spherically connected to the swing body (3); A guide rail (13), wherein the slider (9) is connected to the guide rail (13) in a linear sliding manner; The swing nozzle mechanism is suitable for driving the slider (9) to slide linearly along the guide rail (13) by the nut (8) when the lead screw (7) rotates, thereby driving the swing body (3) to swing through the connecting rod (10).

2. The swing nozzle mechanism according to claim 1, characterized in that: The power structure (11) is a motor.

3. The swing nozzle mechanism according to claim 2, characterized in that: The motor is a vacuum motor.

4. The oscillating nozzle mechanism according to any one of claims 1 to 3, characterized in that: The power structure (11) is connected to the worm (6) via a coupling (12); the coupling (12) is a diaphragm coupling.

5. The oscillating nozzle mechanism according to any one of claims 1 to 3, characterized in that: Also includes: A grating ruler (14) adapted to obtain the position of the slider (9) in real time; A support (15), the power structure (11) and the guide rail (13) are both fixed on the support (15).

6. The oscillating nozzle mechanism according to claim 5, characterized in that: The grating ruler (14) comprises: A ruler, arranged on the support (15); A reading head is arranged on the slider (9), and the reading head is suitable for combining with a ruler to obtain the position of the slider (9) in real time.

7. The oscillating nozzle mechanism according to claim 6, characterized in that: Also includes: A controller is signal-connected to the reading head and the power structure. The controller is suitable for comparing the position information of the slider (9) obtained by the reading head with the preset position information, and adjusting the swing angle of the swing body (3) by controlling the rotation direction and angle of the power structure (11).

8. An engine, characterized in that: include: Combustion chamber (1); A fixed body (4) is sealed and fixedly connected to the combustion chamber (1); an internal passage provided in the fixed body (4) is communicated with the interior of the combustion chamber (1); The swinging body (3) is spherically connected to the fixed body (4), and the internal channel provided in the swinging body (3) is in communication with the internal channel of the fixed body (4); At least three oscillating nozzle mechanisms according to any one of claims 1 to 7 are evenly distributed around the outer circumference of the oscillating body (3).

9. The engine according to claim 8, characterized in that The fixed body (4) and the combustion chamber (1) are connected via a flange, and a trapezoidal sealing groove is provided between the fixed body (4) and the combustion chamber (1), and a trapezoidal sealing structure is provided in the trapezoidal sealing groove.

10. The engine according to claim 8, characterized in that Also includes: The cabin (2) is connected to the combustion chamber (1); the interior of the cabin (2) is hollow; the fixed body (4), the swinging body (3) and the swinging nozzle mechanism are all arranged inside the cabin (2).

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