A ducted main-passive hybrid compensation mode switching valve of an adaptive cycle engine

Abstract

This invention relates to a duct active / passive hybrid compensation mode switching valve for an adaptive cycle engine. The valve is located between the first and second outer ducts of the engine. A hydraulic actuator provides driving force to the active sector valve plate, while passive rectangular valve plates of different shapes compensate for gaps generated during adjustment. This combination of active and passive control achieves the purpose of controlling the opening and closing of different outer ducts. This invention effectively prevents the mixing of airflow between the first and second outer ducts by combining active and passive control. The upper, middle, and lower limit structure design restricts the distance between the two valve plates during adjustment. A special structural design at the valve plate ends ensures the sealing performance of the adjustment mechanism at both the minimum and maximum adjustment angles. Adding reinforcing ribs and plates to the upper surface of the valve plates improves their rigidity and strength.

Description

Technical Field

[0001] This invention belongs to the field of high-performance gas turbine engine technology in aerospace technology, specifically relating to a bypass duct active-passive hybrid compensation mode switching valve for an adaptive cycle engine, used to adjust the opening and closing of different bypass ducts of the engine, enabling the adaptive cycle engine to achieve seamless switching between high-thrust turbojet mode and high-efficiency turbofan mode. Background Technology

[0002] Foreign countries have been researching variable cycle engines since the 1970s, accumulating diverse design schemes for adjustable components and publicly publishing various design schemes for adjustment mechanisms, such as adjustable guide vanes, mode switching valves, ducted ejectors, and adjustable nozzles. In contrast, my country's development of its sixth-generation engine started later, and the research on adjustment mechanisms for sixth-generation engines is still in the exploratory stage, lacking a wealth of design schemes for reference.

[0003] US Patent Application (US5054286A) discloses an active control mode switching valve. This design uses a synchronization ring to ensure the synchronicity of valve plate adjustment, but the displacement transmission process of the drive component is complex, and the complex transmission scheme increases the probability of mechanism jamming. US Patent Application (US4068471A) discloses a mode switching valve that directly controls the valve plate. This design uses a hydraulic actuator to directly control the valve plate, which has independent driving force and high reliability. However, the number of valve plates is the same as the number of actuators, resulting in a significant increase in the weight of the regulating mechanism. Chinese Patent (CN101624937B) discloses a passive control mode switching valve. This design uses pressure difference to achieve duct opening and closing, has a simple structure, and is lightweight, but has slow adjustment speed and poor accuracy, requiring coordination with other regulating mechanisms.

[0004] In summary, existing technologies have shortcomings: the active control adjustment mechanism has a redundant and complex drive transmission structure, resulting in large resistance forces in the transmission process and a large overall mass of the mechanism; the passive control adjustment mechanism has a slow adjustment speed and poor consistency in the opening degree of each valve plate, resulting in uneven circumferential distribution of the flow field. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a ducted active-passive hybrid compensation mode switching valve for an adaptive cycle engine, which overcomes the shortcomings of existing technologies, simplifies the transmission method of the regulating mechanism, changes the control scheme, and improves the regulating accuracy and reliability of the regulating mechanism.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention relates to a ducted active-passive hybrid compensation mode switching valve for an adaptive cycle engine. The mode switching valve is located between the first and second outer ducts and consists of: an outer casing, a front section of an inner casing, a rear section of an inner casing, an active sector valve plate, a passive rectangular valve plate, a T-shaped support, a ladder-shaped limit bar, a split-half synchronous ring, a guide rail, a connecting rod, a slider, a hydraulic actuator connecting rod, a hydraulic actuator cylinder body, a first bolt, a nut, a second bolt, and a ball joint.

[0008] The outer casing is a hollow frustum-shaped annular cavity that is smaller at the front and larger at the back.

[0009] The front section of the inner casing is a hollow frustum-shaped annular cavity that is smaller at the front and larger at the back.

[0010] The rear section of the inner casing is shaped as a hollow cylindrical annular cavity. 24 pairs of short mounting lugs are provided on the front side for connecting active sector valve plates. 24 long mounting lugs are provided on the front side of the upper surface for connecting passive rectangular valve plates. 4 pairs of bolt through holes are symmetrically arranged on the upper axis of the rear section of the inner casing for fixing T-shaped support seats. 2 actuator mounting bosses are symmetrically arranged on the upper surface.

[0011] One end of the active sector valve plate is provided with two pairs of circular mounting lugs for connecting with the short mounting lug bolts on the front side of the rear section of the inner casing. The other end of the active sector valve plate is free, and a sealing baffle is provided on the upper surface of the free end. The upper surface of the active sector valve plate is provided with a connecting rod mounting lug for connecting with a connecting rod. The upper surface of the active sector valve plate is provided with two compensation plate mounting posts for connecting and fixing with the ladder-shaped limit strip. The upper surface of the active sector valve plate is provided with several reinforcing ribs and ribs.

[0012] One end of the passive rectangular valve plate is provided with a pair of rabbit ear-shaped mounting lugs for connecting with the long mounting lugs on the upper surface of the rear section of the inner casing. The other end of the passive rectangular valve plate is free. The upper surface of the passive rectangular valve plate is provided with several reinforcing ribs and ribs, and the surface is sprayed with a high-temperature resistant thermal barrier coating.

[0013] The T-shaped support is an engineering-grade vertical optical axis bracket;

[0014] The ladder-shaped limiting strip is a thin, ladder-shaped strip with two positioning holes in the middle. It is connected and fixed to the active sector valve plate by a second bolt to limit the distance between the active sector valve plate and the passive rectangular valve plate.

[0015] The split-half synchronous ring is semi-circular in shape, with 12 pairs of synchronous ring mounting lugs on the front side. The two ends of the semi-circular ring are provided with mounting bosses with bolt through holes. Two split-half synchronous rings are connected and fixed by the first bolt to form a ring structure. The upper side of the split-half synchronous ring is provided with a slider mounting groove and an actuating cylinder connecting column, which are used to fix the slider and connect the ball joint, respectively.

[0016] The guide rail is an engineering optical axis slide rail;

[0017] The connecting rod is long and thickened symmetrically in the middle. One end of the connecting rod has a pair of fork-shaped mounting lugs for connecting the active sector valve plate, and the other end of the connecting rod has a single mounting lug for connecting the split-half synchronous ring.

[0018] The slider is an engineering-grade box-type slider;

[0019] The hydraulic actuator connecting rod is a connecting rod that is matched with the hydraulic actuator body for use in aviation applications and is used in conjunction with the hydraulic actuator body.

[0020] The hydraulic actuator cylinder body is an aviation-grade hydraulic actuator cylinder body;

[0021] The ball joint is an engineering ball joint used in conjunction with a hydraulic actuator connecting rod.

[0022] The detailed working principle and process of this invention are as follows:

[0023] The mode switching valve adopts an active-passive hybrid control scheme. During the adjustment process, the hydraulic actuator cylinder and connecting rod extend and retract, driving the split-type synchronous ring to move along the rear section of the inner casing. The forward and backward movement of the split-type synchronous ring drives the connecting rod to rotate at a certain angle. The rotation of the connecting rod causes the active sector valve plate to change angle. Since the active sector valve plate is fixedly connected to the ladder-shaped limit strip, the ladder-shaped limit strip restricts the position of the passive rectangular valve plate. The active sector valve plate and the passive rectangular valve plate always maintain line contact. While the active sector valve plate rotates, it will drive the passive rectangular valve plate to change angle, ultimately realizing the opening and closing adjustment of the duct area.

[0024] The beneficial effects of this invention are:

[0025] (1) The split-half synchronous ring is adopted to solve the problem of disassembly and assembly difficulties caused by the use of integrated synchronous rings in engineering applications. At the same time, it ensures the consistency of the adjustment of the active sector valve plate and reduces the jamming phenomenon in the adjustment process.

[0026] (2) Use symmetrically distributed hydraulic drive devices to reduce the mass of the drive mechanism.

[0027] (3) Combining active control with passive control, the hydraulic drive device formed by the hydraulic actuator cylinder body and the hydraulic actuator connecting rod provides the driving force for active control. Then, the active control component's active sector valve plate drives the passive control component's passive rectangular valve plate to complete the angle adjustment of the adjustment mechanism. This avoids the unreliability caused by using pressure difference to passively control the opening and closing of the duct, while simultaneously improving the accuracy of the adjustment mechanism and reducing the hysteresis of the adjustment mechanism.

[0028] (4) Both the active sector valve plate and the passive rectangular valve plate have an arc structure design at the end that matches the casing, and the upper surface of the active sector valve plate is provided with a sealing baffle to ensure that the mode switching valve adjustment mechanism has sealing performance at both the minimum and maximum adjustment angles. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a ducted active-passive hybrid compensation mode switching valve for an adaptive cycle engine according to the present invention.

[0030] Figure 2 This is a schematic diagram of the casing of the present invention;

[0031] Figure 3 This is a schematic diagram of the assembly of the adjusting part of the present invention;

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 This is a schematic diagram of the split-half synchronization ring of the present invention;

[0034] Figure 6 This is a schematic diagram of the ladder-shaped limiting strip of the present invention;

[0035] Figure 7(a) is a schematic diagram of the minimum adjustment angle of the valve plate of the present invention;

[0036] Figure 7(b) is a schematic diagram of the maximum adjustment angle of the valve plate of the present invention;

[0037] Figure 8(a) is a schematic diagram of the minimum adjustment angle state of the present invention;

[0038] Figure 8(b) is a schematic diagram of the maximum adjustment angle state of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figure 1As shown in Figure 8, the ducted active-passive hybrid compensation mode switching valve of an adaptive cycle engine of the present invention includes: an outer casing 1, a front section of an inner casing 2, a rear section of an inner casing 3, an active sector valve plate 4, a passive rectangular valve plate 5, a T-shaped support 6, a ladder-shaped limit bar 7, a split-half synchronous ring 8, a guide rail 9, a connecting rod 10, a slider 11, a hydraulic actuator connecting rod 12, a hydraulic actuator cylinder body 13, a first bolt 14, a nut 15, a second bolt 16, and a ball joint 17. The short mounting lug 3-1 on the front side of the rear section 3 of the inner casing is bolted to the active sector valve plate 4. The long mounting lug 3-2 on the upper surface of the rear section 3 of the inner casing is bolted to the passive rectangular valve plate 5. The compensating plate mounting post 4-3 on the upper surface of the active sector valve plate 4 is fixed to the ladder-shaped limit strip 7 by connecting it to the second bolt 16. The connecting rod mounting lug 4-4 ​​on the upper surface of the active sector valve plate 4 is bolted to the connecting rod 10. The connecting rod 10 is bolted to the synchronous ring mounting lug 8-1 on the front side of the split synchronous ring 8. The slider mounting groove 8-3 on the upper side of the split synchronous ring 8 is bolted to the slider 11. Block 11 is connected to guide rail 9, allowing slider 11 to slide back and forth along guide rail 9. Guide rail 9 is fixed to T-shaped support 6 through a fit. T-shaped support 6 is fixed to bolt through hole 3-3 of rear section 3 of inner casing through bolts. Actuator cylinder connecting column 8-4 on the upper side of split synchronous ring 8 is fixed to ball joint 17 through a fit. Ball joint 17 is connected to hydraulic actuator cylinder connecting rod 12 through a fit. Hydraulic actuator cylinder connecting rod 12 is connected to hydraulic actuator cylinder body 13 through a fit, allowing hydraulic actuator cylinder connecting rod 12 to move back and forth along the outer surface of rear section 3 of inner casing. Hydraulic actuator cylinder body 13 is fixed to actuator cylinder mounting boss 3-4 through ball joint 17 through a fit.

[0041] like Figure 2 As shown, the outer casing 1 is a hollow frustum-shaped annular cavity that is smaller at the front and larger at the back; the front section 2 of the inner casing is a hollow frustum-shaped annular cavity that is smaller at the front and larger at the back; the rear section 3 of the inner casing is a hollow cylindrical annular cavity, with 24 pairs of short mounting lugs 3-1 on the front side for connecting the active sector valve plate 4, and 24 long mounting lugs 3-2 on the front side of the upper surface for connecting the passive rectangular valve plate 5. The rear section 3 of the inner casing has 4 pairs of bolt through holes 3-3 symmetrically arranged on the upper axis for fixing the T-shaped support seat 6, and 2 actuator mounting bosses 3-4 symmetrically arranged on the upper surface of the rear section 3 of the inner casing.

[0042] like Figure 3 and Figure 4 As shown, Figure 4 for Figure 3The enlarged schematic diagram at point A shows the movement of the regulating part of the duct's active-passive hybrid compensation mode switching valve as follows: the hydraulic actuator cylinder 13 and the hydraulic actuator rod 12 work together to drive the split-type synchronous ring 8 to translate along the rear section 3 of the inner casing. The forward and backward translation of the split-type synchronous ring 8 drives the connecting rod 10 to rotate at a certain angle. The rotation of the connecting rod 10 drives the active sector valve plate 4 to rotate. The active sector valve plate 4 and the ladder-shaped limit strip 7 are connected and fixed by the second bolt 16. The ladder-shaped limit strip 7 limits the distance between the active sector valve plate 4 and the passive rectangular valve plate 5, so that the active sector valve plate 4 and the passive rectangular valve plate 5 always maintain line contact. When the active sector valve plate 4 rotates, it will drive the passive rectangular valve plate 5 to rotate.

[0043] like Figure 5 As shown, the split-half synchronous ring 8 is semi-circular in shape, with 12 pairs of synchronous ring mounting lugs 8-1 on the front side. The two ends of the semi-circular ring are provided with mounting bosses 8-2 with bolt through holes. Two split-half synchronous rings 8 are connected and fixed by the first bolt 14 to form a ring structure. The upper side is provided with a slider mounting groove 8-3 and an actuator cylinder connecting column 8-4, which are respectively connected and fixed to the slider 11 and the connecting ball joint 17.

[0044] like Figure 6 As shown, the ladder-shaped limiting strip 7 is a thin, ladder-shaped strip with a positioning hole 7-1 in the middle. It is connected and fixed to the active sector valve plate 4 by the second bolt 16, thereby limiting the distance between the active sector valve plate 4 and the passive rectangular valve plate 5.

[0045] As shown in Figures 7(a) and 7(b), one end of the active sector valve plate 4 is provided with two pairs of circular mounting lugs 4-2 for bolting to the short mounting lugs 3-1 on the front side of the rear section 3 of the inner casing. The other end is free, and a sealing baffle 4-1 is provided on the upper surface of the free end. The upper surface of the active sector valve plate 4 is provided with one connecting rod mounting lug 4-4 ​​for connecting to the connecting rod 10. The upper surface of the active sector valve plate 4 is provided with several reinforcing ribs and ribs. The upper surface of the active sector valve plate 4 is provided with two compensating plate mounting posts 4-3 for connecting the ladder. The passive rectangular valve plate 5 has a pair of rabbit ear-shaped mounting lugs 5-1 at one end, which are used to connect with the long mounting lugs 3-2 on the upper surface of the rear section 3 of the inner casing. The other end is free. The upper surface of the passive rectangular valve plate 5 is provided with several reinforcing ribs and ribs. The active sector valve plate 4 is connected and fixed to the ladder-shaped limiting strip 7 by the second bolt 16. The ladder-shaped limiting strip 7 limits the distance between the active sector valve plate 4 and the passive rectangular valve plate 5, so that the active sector valve plate 4 and the passive rectangular valve plate 5 always maintain line contact during the adjustment process.

[0046] like Figure 8(a) and 8(b)The diagrams shown are the minimum and maximum adjustment angle states of the duct's active-passive hybrid compensation mode switching valve, respectively. In the minimum adjustment angle state, the adjustment mechanism operates until the active sector valve plate 4 is tightly fitted with the front section 2 of the inner casing. In the maximum adjustment angle state, the adjustment mechanism operates until the active sector valve plate 4 is tightly fitted with the outer casing 1.

[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bypass active hybrid compensation mode switching valve for an adaptive cycle engine, characterized by: The duct active-passive hybrid compensation mode switching valve is located between the first and second outer ducts of the adaptive cycle engine, and includes: outer casing (1), inner casing front section (2), inner casing rear section (3), active sector valve plate (4), passive rectangular valve plate (5), T-shaped support seat (6), ladder-shaped limit bar (7), split-half synchronous ring (8), guide rail (9), connecting rod (10), slider (11), hydraulic actuator connecting rod (12), hydraulic actuator cylinder body (13), first bolt (14), nut (15), second bolt (16), and ball joint (17). The outer casing (1) is a hollow frustum-shaped cavity with a smaller front and a larger rear; the front section (2) of the inner casing is a hollow frustum-shaped cavity with a smaller front and a larger rear; the rear section (3) of the inner casing is a hollow cylindrical annular cavity, with several short mounting lugs (3-1) on the front side for connecting the active sector valve plate (4), and several long mounting lugs (3-2) on the front side of the upper surface for connecting the passive rectangular valve plate (5); the rear section (3) of the inner casing has 4 pairs of bolt through holes (3-3) symmetrically arranged on the upper axis for fixing the T-shaped support seat (6), and the upper surface of the rear section (3) of the inner casing has symmetrically arranged actuator cylinder mounting bosses (3-4); one end of the active sector valve plate (4) is circumferentially connected to the rear section (3) of the inner casing, and the other end is free; one end of the passive rectangular valve plate (5) is circumferentially connected to the rear section (3) of the inner casing. The rear section (3) of the inner casing is spaced between two adjacent active sector valve plates (4), with one end free; the ladder-shaped limiting strip (7) is fixed to the active sector valve plate (4) by the second bolt (16); one end of the connecting rod (10) is connected to the active sector valve plate (4), and the other end is connected to the split-half synchronous ring (8); the hydraulic actuator cylinder body (13) cooperates with the hydraulic actuator cylinder connecting rod (12), and the working extension moves along the rear section (3) of the inner casing, driving the split-half synchronous ring (8) to move, the split-half synchronous ring (8) to move, the split-half synchronous ring (8) to move, the connecting rod (10) to rotate, the connecting rod (10) to rotate, the active sector valve plate (4) to rotate, the active sector valve plate (4) to rotate, the passive rectangular valve plate (5) to rotate, thereby realizing the opening and closing adjustment of the duct area.

2. A hybrid compensating mode switching valve for a bypass of a self-adapting cyclic engine according to claim 1, characterized in that: The ladder-shaped limiting strip (7) limits the distance between the active sector valve plate (4) and the passive rectangular valve plate (5), so that the active sector valve plate (4) and the passive rectangular valve plate (5) always maintain line contact during the adjustment process. The active sector valve plate (4) rotates a certain adjustment angle, and at the same time drives the passive rectangular valve plate (5) to rotate the same angle.

3. The hybrid compensating mode switching valve of a ducted self-adapting cyclic engine according to claim 1, characterized in that: The active sector valve plate (4) is driven by the connecting rod (10). The inner casing front section (2) and the outer casing (1) control the minimum and maximum adjustment positions of the valve plate respectively. The passive rectangular valve plate (5) is limited in its movement angle by the ladder-shaped limit bar (7).

4. The ducted active / passive hybrid compensation mode switching valve for an adaptive cycle engine according to claim 1, characterized in that: The active sector valve plate (4) and the passive rectangular valve plate (5) are thin-walled structures with several reinforcing ribs and ribs on the upper surface to increase structural strength and rigidity.

5. The ducted active / passive hybrid compensation mode switching valve for an adaptive cycle engine according to claim 1, characterized in that: The upper surface of the active fan-shaped valve plate (4) is provided with a sealing baffle (4-1) to ensure that it fits tightly against the inner surface of the outer casing (1) when it moves to the maximum adjustment angle. The front side of the active fan-shaped valve plate (4) is provided with a certain curvature to ensure that it fits tightly against the front section (2) surface of the inner casing when it moves to the minimum adjustment angle, thereby reducing air leakage.

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