A guide type transmission system in a variable cycle engine mode conversion valve

Abstract

The present application relates to aerospace technology high-performance gas turbine engine technical field, disclose a kind of variable cycle engine mode conversion valve in guiding type transmission system, including a kind of variable cycle engine mode conversion valve in guiding type transmission structure, including retainer, fixedly connected on the inner wall of engine outer duct inlet;Hydraulic actuator, setting on retainer, the telescopic end of hydraulic actuator is provided with the one end of steering shaft, the other end of steering shaft is fixedly connected with the one end of transmission shaft, the other end of transmission shaft is located in the engine outer duct and passes through outer casing;Balancing component, balancing component one end is arranged on steering shaft, and balancing component other end is in contact with the outer wall of retainer;A kind of variable cycle engine mode conversion valve in guiding type transmission system, including actuating system, actuating system is connected with transmission shaft transmission.This application realizes guiding while working, increases the working stability and reliability of engine mode conversion valve.

Description

Technical Field

[0001] This invention relates to the field of high-performance gas turbine engine technology in aerospace, and in particular to a guided transmission system in a variable cycle engine mode switching valve. Background Technology

[0002] A variable cycle engine is a type of gas turbine engine that can achieve different thermodynamic cycles by changing the geometry, size, or position of certain engine components. The core component of this engine is the mode switching valve, which is responsible for adjusting the opening and closing of the valve to switch the engine's operating modes. However, the transmission system at the valve's front end often experiences movement jamming during operation, which severely affects the engine's variable cycle function.

[0003] Although foreign countries have developed demonstrator machines to implement this mode selection valve scheme, the specific implementation method and structural form are kept strictly confidential. While my country has some patents related to mode selection valves, in engineering practice, the frequent occurrence of motion jamming and wear on connecting joints in the transmission system is a significant problem, which can lead to the failure of the engine's variable cycle function.

[0004] Therefore, there is an urgent need for a guided transmission system in a variable cycle engine mode switching valve to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a guided transmission system in a variable cycle engine mode switching valve to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a guide-type transmission structure in a variable cycle engine mode switching valve, comprising:

[0007] The cage is fixedly connected to the inner wall of the engine's outer bypass duct inlet;

[0008] A hydraulic actuator is mounted on the cage. One end of the hydraulic actuator is connected to a steering shaft at its telescopic end. The other end of the steering shaft is fixedly connected to one end of a drive shaft. The other end of the drive shaft passes through the outer casing and is located inside the engine's outer bypass duct.

[0009] The balancing assembly includes several balancing links, one end of which is fixedly connected to the steering shaft, and the other end of which is provided with a balancing element that contacts the outer wall of the cage.

[0010] Preferably, the balancing component includes rollers mounted on the balancing link, the rollers being disposed in contact with the outer wall of the cage.

[0011] Preferably, the balancing assembly includes a plurality of balancing links fixedly connected at one end to the drive shaft, and a roller is mounted at the other end of the balancing link, the roller being connected to the outer wall of the cage.

[0012] Preferably, the hydraulic actuator includes a hydraulic actuator cylinder body fixedly connected within the cage, one end of the hydraulic actuator drive shaft is provided on the hydraulic actuator cylinder body, the other end of the hydraulic actuator drive shaft passes through the cage and is provided with a ball joint, and the steering shaft is hinged to the ball joint.

[0013] Preferably, the retainer has a double-layer structure, the hydraulic actuating cylinder is located between the double-layer structure, and a plurality of rollers are respectively arranged to contact the top and bottom ends of the double-layer structure.

[0014] Preferably, a gap is provided between the balance link and the top and bottom ends of the double-layer structure.

[0015] Preferably, the number of balance links is an even number, and at least two, with the two balance links symmetrically arranged at the top and bottom of the double-layer structure.

[0016] A guided transmission system in a variable cycle engine mode switching valve includes:

[0017] An actuation system is disposed within the outer bypass duct of the engine, and one end of the drive shaft located within the outer bypass duct of the engine is connected to the actuation system for transmission.

[0018] Preferably, the actuation system includes an actuation ring disposed in the outer bypass duct of the engine and a plurality of actuation windows. The actuation ring has a recessed hole, which is interference-fitted with the drive shaft. The other side of the actuation ring is connected to a plurality of actuation windows through a plurality of connectors.

[0019] Preferably, the actuating ring has several grooves evenly spaced along its circumference, the connecting member includes a connecting plate fixedly connected in the grooves, and two lifting lugs are fixedly connected to one end of the actuating window near the connecting plate, the connecting plate and the lifting lugs are connected by bolts.

[0020] Preferably, the end of the actuation window away from the connecting plate has a recessed continuous arc segment structure.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] This invention provides a guided transmission system in a variable cycle engine mode switching valve. A cage is mounted on the inner wall of the engine's outer bypass duct inlet. A hydraulic actuator drives the steering shaft and drive shaft to move. A balancing assembly is mounted on the steering shaft and contacts the cage, eliminating the overturning moment caused by the original structural limitations. This significantly enhances transmission stability. By eliminating the overturning moment that adversely affects the transmission system, the lifespan of each component is extended. Simultaneously, the entire transmission system exhibits good performance and stability under different conditions, further enhancing its adaptability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a front view of the overall structure of the present invention;

[0025] Figure 2 This is a perspective view of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the hydraulic actuator cylinder structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the balancing component structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the actuation system structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the operating window structure of the present invention;

[0030] Figure 7 This is a schematic diagram showing the connection state between the actuating ring and the connecting plate of the present invention;

[0031] Among them, 1. cage; 2. steering shaft; 3. drive shaft; 4. outer casing; 5. balance link; 6. roller; 7. hydraulic actuator cylinder body; 8. hydraulic actuator drive shaft; 9. ball joint; 10. actuator ring; 11. actuator window; 12. recessed hole; 13. groove; 14. connecting plate; 15. lifting lug. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1-7 This invention provides a guide-type transmission structure in a variable cycle engine mode switching valve, comprising:

[0035] Cage 1 is fixedly connected to the inner wall of the engine's outer bypass duct inlet;

[0036] A hydraulic actuator is mounted on a retainer 1. One end of a steering shaft 2 is mounted on the telescopic end of the hydraulic actuator. The other end of the steering shaft 2 is fixedly connected to one end of a drive shaft 3. The other end of the drive shaft 3 passes through the outer casing 4 and is located inside the engine's outer bypass duct.

[0037] The balancing assembly includes several balancing links 5. One end of each balancing link 5 is fixedly connected to the steering shaft 2, and the other end of each balancing link 5 is provided with a balancing element, which contacts the outer wall of the cage 1.

[0038] The scheme is further optimized, and the balancing component includes a roller 6 mounted on the balancing link 5, with the roller 6 in contact with the outer wall of the cage 1.

[0039] The scheme is further optimized. The hydraulic actuator includes a hydraulic actuator cylinder body 7 fixedly connected in the cage 1. One end of the hydraulic actuator cylinder drive shaft 8 is provided on the hydraulic actuator cylinder body 7. The other end of the hydraulic actuator cylinder drive shaft 8 passes through the cage 1 and is provided with a ball joint 9. The steering shaft 2 is hinged to the ball joint 9.

[0040] The scheme is further optimized so that the cage 1 is a double-layer structure, the hydraulic actuating cylinder 7 is located between the double-layer structure, and several rollers 6 are respectively set to contact the top and bottom of the double-layer structure.

[0041] The roller 6 moves on the cage 1, and the overturning torque transmitted to the roller 6 is converted into heat and dissipated through rolling friction.

[0042] The design was further optimized by creating gaps between the balance link 5 and the top and bottom of the double-layer structure.

[0043] The scheme is further optimized so that the number of balance links 5 is an even number, and there are at least two. The two balance links 5 are symmetrically arranged at the top and bottom of the double-layer structure.

[0044] When there are two balance links 5, they are respectively set on the top and bottom of the double-layer structure. The symmetrical arrangement of the balance links 5 can eliminate overturning moments in different directions at the same time, so that the entire transmission system can exhibit good performance and stability when dealing with different situations, further enhancing its adaptability.

[0045] The specific number of balance links 5 is an even number, and they are symmetrically arranged on the upper and lower ends of the cage 1, with the distribution position selected according to actual use.

[0046] The overall structural function is as follows: By controlling the oil pressure inside the hydraulic actuator cylinder 7, the hydraulic actuator drive shaft 8 is extended and retracted, causing the steering shaft 2, connected to its end ball joint 9, to move horizontally left and right. Due to the presence of the steering shaft 2, there is an offset between the axial direction of the hydraulic actuator drive shaft 8 and the axial direction of the transmission shaft 3. When the hydraulic actuator generates driving force, this offset produces an overturning moment, which acts directly on the end ball joint 9 of the hydraulic actuator drive shaft 8. This overturning moment causes the steering shaft 2 to bend and deform, resulting in wear of the end ball joint 9 and jamming of the transmission mechanism.

[0047] By symmetrically installing two balance rods 5 on the steering shaft 2, the overturning moment generated by the steering shaft 2 can be transmitted to the cage 1 via the balance rods 5. Specifically, when the hydraulic actuator drive shaft 8 drives the steering shaft 2 to move to the right, a clockwise overturning moment acts on the steering shaft 2. At this time, the lower section of the balance rod 5 contacts the lower end face of the cage 1. The balance rod 5 also moves with the steering shaft 2. Due to the presence of the steering shaft 2, an overturning moment is generated when the hydraulic actuator drive shaft 8 is working. At this time, the balance rod 5 transmits the overturning moment to the cage 1 and drives the balance rod 5 to move. The overturning moment is then transmitted to the lower end face of the cage 1 via the balance rod 5. The roller 6 moves relative to the lower end face of the cage 1, and the friction between them is rolling friction, which can buffer and absorb impact, improve stability and noise suppression capabilities.

[0048] Similarly, when the hydraulic actuator drive shaft 8 drives the steering shaft 2 to move to the left, a counterclockwise overturning moment acts on the steering shaft 2. At this time, the upper balance link 5 contacts the upper end face of the cage 1. The balance link 5 also transmits the overturning moment to the cage 1, causing the balance link 5 to move. The overturning moment is then transmitted to the upper end face of the cage 1 through the balance link 5. The roller 6 moves relative to the upper end face of the cage 1, and the friction between them is also rolling friction, which can buffer and absorb impact, improving stability and noise suppression.

[0049] A guided transmission system in a variable cycle engine mode switching valve includes:

[0050] The actuation system is located inside the engine's outer bypass duct, and the end of the drive shaft 3 located inside the engine's outer bypass duct is connected to the actuation system for transmission.

[0051] The further optimized scheme includes an actuation system comprising an actuation ring 10 and several actuation windows 11 disposed in the outer bypass duct of the engine. The actuation ring 10 has a recessed hole 12, which is interference-fitted with the drive shaft 3. The other side of the actuation ring 10 is connected to several actuation windows 11 through several connectors.

[0052] The actuator ring 10 is connected to the drive shaft 3 through the concave hole 12, and the drive shaft 3 controls the movement of the actuator ring 10.

[0053] The scheme is further optimized by providing several grooves 13 evenly spaced along the circumference of the actuating ring 10. The connecting component includes a connecting plate 14 fixedly connected in the groove 13. Two lifting lugs 15 are fixedly connected to one end of the actuating window 11 near the connecting plate 14. The connecting plate 14 and the lifting lugs 15 are connected by bolts.

[0054] The connection between the actuation window 11 and the actuation ring 10 is achieved by connecting the connecting plate 14 and the lifting lug 15, and installing the connecting plate 14 in the groove 13. The number of grooves 13 is preferably eight.

[0055] The scheme was further optimized so that the end of the actuation window 11 away from the connecting plate 14 is a recessed continuous arc structure.

[0056] The recessed continuous arc structure facilitates contact with the sealing opening of the inner channel.

[0057] Working Principle: The transmission system, through the contact between the balance link 5 and the cage 1, eliminates the overturning moment caused by the limitations of the original structure, significantly enhancing the stability of the transmission. When the hydraulic actuator drive shaft 8 moves in different directions, the symmetrically arranged balance link 5 can simultaneously eliminate the overturning moment in different directions. This design has extremely high adaptability and flexibility, enabling the transmission system to cope with various complex motion conditions. Regardless of the direction of movement of the hydraulic actuator drive shaft 8, the balance link 5 can effectively eliminate the generated overturning moment, thereby ensuring the stability and accuracy of the entire transmission system. In addition, this design significantly improves the durability of the transmission system. Because the overturning moment that adversely affects the transmission system is eliminated, the lifespan of each component is extended. Simultaneously, the symmetrically arranged balance link 5 allows the entire transmission system to exhibit good performance and stability under different conditions, further enhancing its adaptability.

[0058] The overturning moment is transmitted to the roller 6 via the balance link 5. The roller 6 moves on the cage 1, and the overturning moment transmitted to the roller 6 is converted into heat through rolling friction. This has two advantages: firstly, the heat generated by the friction of the roller 6 can be quickly transferred to the surrounding environment, effectively reducing the impact of heat generated by the frictional torque on the roller 6 and the cage 1, thus improving their service life. Secondly, because the overturning moment is converted into heat, the roller 6 is not subjected to sudden impacts and vibrations during movement, thereby improving the roller's stability and accuracy. Furthermore, due to the low coefficient of friction of rolling friction, energy consumption is reduced, improving system efficiency. By converting the overturning moment into heat, the service life, stability, and accuracy of the roller and cage can be effectively improved, while reducing energy consumption and increasing system efficiency.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A guide-type transmission structure in a variable cycle engine mode switching valve, characterized in that, include: The cage (1) is fixedly connected to the inner wall of the engine's outer bypass duct inlet; A hydraulic actuator is mounted on the cage (1). The telescopic end of the hydraulic actuator is provided with one end of a steering shaft (2). The other end of the steering shaft (2) is fixedly connected to one end of a drive shaft (3). The other end of the drive shaft (3) passes through the outer casing (4) and is located inside the outer bypass duct of the engine. The balancing assembly includes several balancing links (5), one end of which is fixedly connected to the steering shaft (2), and the other end of which is provided with a balancing element, which contacts the outer wall of the cage (1).

2. The guide transmission structure in a variable cycle engine mode switching valve according to claim 1, characterized in that: The balancing component includes a roller (6) mounted on the balancing link (5), and the roller (6) is disposed in contact with the outer wall of the cage (1).

3. The guide transmission structure in a variable cycle engine mode switching valve according to claim 2, characterized in that: The hydraulic actuator includes a hydraulic actuator cylinder body (7) fixedly connected in the cage (1). One end of the hydraulic actuator cylinder body (7) is provided on the hydraulic actuator cylinder body (7). The other end of the hydraulic actuator cylinder drive shaft (8) passes through the cage (1) and is provided with a ball joint (9). The steering shaft (2) is hinged to the ball joint (9).

4. The guide transmission structure in a variable cycle engine mode switching valve according to claim 3, characterized in that: The retainer (1) has a double-layer structure, the hydraulic actuating cylinder (7) is located between the double-layer structure, and several rollers (6) are respectively arranged to contact the top and bottom of the double-layer structure.

5. The guide transmission structure in a variable cycle engine mode switching valve according to claim 4, characterized in that: A gap is provided between the balance link (5) and the top and bottom ends of the double-layer structure.

6. The guide transmission structure in a variable cycle engine mode switching valve according to claim 5, characterized in that: The number of balance links (5) is an even number, and there are at least two. The two balance links (5) are symmetrically arranged on the top and bottom of the double-layer structure.

7. A guide-type transmission system in a variable cycle engine mode switching valve, applicable to the guide-type transmission structure in a variable cycle engine mode switching valve according to any one of claims 1-6, characterized in that, include: An actuation system is installed inside the engine's outer bypass duct, and one end of the drive shaft (3) located inside the engine's outer bypass duct is connected to the actuation system for transmission.

8. The guide transmission system in a variable cycle engine mode switching valve according to claim 7, characterized in that: The actuation system includes an actuation ring (10) and several actuation windows (11) disposed in the outer bypass duct of the engine. The actuation ring (10) has a recess (12) which is interference-fitted with the drive shaft (3). The other side of the actuation ring (10) is connected to several actuation windows (11) through several connectors.

9. The guide transmission system in a variable cycle engine mode switching valve according to claim 8, characterized in that: The actuating ring (10) has several grooves (13) evenly spaced along its circumference. The connecting member includes a connecting plate (14) fixedly connected in the grooves (13). The actuating window (11) has two lifting lugs (15) fixedly connected to one end near the connecting plate (14). The connecting plate (14) and the lifting lugs (15) are connected by bolts.

10. The guided transmission system in a variable cycle engine mode switching valve according to claim 9, characterized in that: The end of the actuation window (11) away from the connecting plate (14) is a concave continuous arc structure.

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