An adjustable nozzle outer / lower outer adjustment plate limiting structure assembly for an aero-engine

Abstract

This invention provides a limiting structure assembly for the outer / lower adjusting plates of an adjustable nozzle for an aero-engine. It includes multiple outer and lower adjusting plates fixed to a support ring at circumferential intervals. The outer and lower adjusting plates are riveted together by hooks A, B, and C, and connected at their tail ends by a limiting structure. Each lower adjusting plate has a plate connected to it via a gasket, forming a gap between the plate and the lower adjusting plate. This invention ensures that during the expansion movement of the adjustable nozzle from its minimum diameter state to its maximum diameter state, the lower adjusting plates do not dislodge from the existing limiting gaps between the outer adjusting plates. This ensures that the outer / lower adjusting plates always form a complete envelope surface, achieving a reliable maximum diameter nozzle state, thereby guaranteeing the safe and reliable performance of the adjustable nozzle during operation.

Description

Technical Field

[0001] This invention relates to a limiting structure assembly for the outer / lower outer adjusting plate of an adjustable nozzle for an aero-engine, belonging to the technical field of aero-engine nozzle structure design. Background Technology

[0002] The adjustable nozzle of an aircraft engine is one of the main structures of the engine exhaust system. The circular envelope formed by the outer and lower outer adjustment vanes ensures the aerodynamic efficiency of the aircraft tail and achieves the rectification of the external airflow.

[0003] The outer and lower outer adjustment vanes of the adjustable nozzle are exposed outside the aircraft body. After being connected to the afterburner cylinder through the fairing support ring, they cover the entire adjustable nozzle adjustment vane and its internal actuation adjustment mechanism, and move in and out according to the changes in the engine operating state.

[0004] Currently, the movement trajectory of the outer / lower adjusting vanes is not restricted laterally or longitudinally. When the engine condition changes and the outer / lower adjusting vanes expand from the minimum diameter to the maximum diameter, the overlapping edge of the outer / lower adjusting vanes may come off, resulting in an incomplete envelope surface. This makes it impossible to obtain a reliable maximum diameter nozzle state, thus making the safety performance of the adjustable nozzle operation unreliable. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a limiting structure assembly for the outer / lower outer adjustment plate of an adjustable nozzle for an aero-engine. This limiting structure assembly for the outer / lower outer adjustment plate of the adjustable nozzle for an aero-engine solves the problem of the overlapping edge portion of the outer / lower outer adjustment plate of the adjustable nozzle coming off during engine operation.

[0006] The present invention is achieved through the following technical solutions.

[0007] This invention provides a limiting structure assembly for the outer / lower adjusting vanes of an adjustable nozzle for an aero-engine, comprising multiple outer adjusting vanes and lower adjusting vanes fixed to a support ring at circumferential intervals; the outer adjusting vanes and lower adjusting vanes are riveted together by hooks A, B, and C, and connected at their tail ends by a limiting structure; each lower adjusting vane has a plate, which is connected to the lower adjusting vane by a gasket, forming a gap between the plate and the lower adjusting vane; the limiting structure includes a hook D, one end of which is connected to the outer adjusting vane, and the other end overlaps within the gap.

[0008] The front end of the outer adjustment piece is connected to the support ring by a screw, and an outer lower adjustment piece is inserted between every two adjacent outer adjustment pieces.

[0009] The front end of the lower outer adjustment piece is connected to the support ring by a screw, which covers the gap between two adjacent lower outer adjustment pieces.

[0010] Both ends of the hook D are L-shaped.

[0011] Hooks A, B, and C are connected to the outer adjusting plate and the outer lower adjusting plate by rivets.

[0012] The hook D is riveted to the axial position of the outer adjusting plate.

[0013] The gasket and plate are connected to the lower outer adjusting plate by rivets.

[0014] Both sides of the outlet section of the outer lower adjustment plate are provided with plates, and one end of the hook D on the adjacent outer adjustment plate overlaps with the plates on both sides through the gap formed by the gasket and the outer lower adjustment plate.

[0015] The length of the gasket is less than the length of the plate.

[0016] The beneficial effects of this invention are: it can ensure that during the expansion movement of the adjustable nozzle from the minimum diameter state to the maximum diameter state, the outer lower adjustment plate does not come out of the existing limiting gap between the outer adjustment plates, so that the outer / outer lower adjustment plates always form a complete envelope surface to obtain a reliable maximum diameter nozzle state, thereby ensuring the safe and reliable performance of the adjustable nozzle during operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the installation structure of the inner and outer adjusting plates and hook D;

[0019] Figure 3 yes Figure 1 Schematic diagram of the installation structure of the middle and outer lower adjustment plates, shims and plates;

[0020] In the diagram: 1-Support ring, 2-Hook A, 3-Hook B, 4-Hook C, 5-Hook D, 6-Washer, 7-Plate, 8-Outer adjusting piece, 9-Outer lower adjusting piece. Detailed Implementation

[0021] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0022] Example 1

[0023] like Figures 1-3The illustrated adjustable nozzle outer / lower outer adjustment plate limiting structure assembly for an aero-engine includes multiple outer adjustment plates 8 and outer lower adjustment plates 9 fixed to a support ring 1 at circumferential intervals. The outer adjustment plates 8 and outer lower adjustment plates 9 are riveted together by hooks A2, B3, and C4, and connected at their tail ends by a limiting structure. The outer lower adjustment plate 9 is provided with a plate 7, which is connected to the outer lower adjustment plate 9 by a gasket 6, forming a gap between the plate 7 and the outer lower adjustment plate 9. The limiting structure includes a hook D5, one end of which is connected to the outer adjustment plate 8, and the other end overlaps within the gap.

[0024] The front end of the outer adjustment piece 8 is connected to the support ring 1 by a screw, and an outer lower adjustment piece 9 is inserted between every two adjacent outer adjustment pieces 8.

[0025] The front end of the lower outer adjustment piece 9 is connected to the support ring 1 by a screw, which covers the gap between two adjacent lower outer adjustment pieces 8.

[0026] Both ends of the hook D5 are L-shaped.

[0027] The hooks A2, B3, and C4 are connected to the outer adjusting piece 8 and the outer lower adjusting piece 9 by rivets.

[0028] The hook D5 is riveted to the axial position of the outer adjusting piece 8.

[0029] The gasket 6 and plate 7 are connected to the outer lower adjusting piece 9 by rivets.

[0030] Both sides of the outlet section of the outer lower adjustment plate 9 are provided with plates 7, and one end of the hook D5 on the adjacent outer adjustment plate 8 overlaps with the plates 7 on both sides through the gap formed by the gasket 6 and the outer lower adjustment plate 9.

[0031] The length of the pad 6 is less than the length of the plate 7. The L-shaped hooks D5 at both ends cooperate with the plates 7 and pads 6 of different lengths to achieve the limiting function of the outer / outer lower adjustment piece in the horizontal and vertical positions.

[0032] Example 2

[0033] The scheme of Example 1 is adopted, and:

[0034] Twelve outer and twelve lower outer adjusting pieces are fixed to the support ring 1 at circumferential intervals. The front end of the outer adjusting piece 8 is fixed to the support ring 1. Hooks A2, B3, and C4 are riveted to the outer adjusting piece 8. Between every two adjacent outer adjusting pieces 8, the lower outer adjusting piece 9 is inserted into the gap formed by the outer adjusting piece 8 and the three hooks. The front end of the lower outer adjusting piece 9 is fixed to the support ring 1, so that the lower outer adjusting piece 9 covers the gap between two adjacent outer adjusting pieces 8.

[0035] A limiting structure is designed at the tail end of the outer / lower outer adjusting plate. A hook D5 with L-shaped ends is riveted to the outer adjusting plate 8. At the corresponding position of the lower outer adjusting plate 9, the shim 7 and the plate 6 are riveted together, forming a gap in the middle for the L-shaped rod of the hook D5 to overlap. This allows the L-shaped rod and the shim 6 to limit the movement of the adjustable nozzle's outer / lower outer adjusting plate laterally. When the nozzle moves longitudinally, the plate 7 clamps and limits the hook D5. The limiting assembly formed in this way can ensure that the lower outer adjusting plate 9 does not come out of the existing limiting gap between the outer adjusting plates 8 during the expansion movement of the adjustable nozzle from the minimum diameter state to the maximum diameter state, thus ensuring the limiting of the outer / lower outer adjusting plate in the lateral and longitudinal directions.

[0036] Example 3

[0037] The scheme of Example 1 is adopted, and:

[0038] In order to ensure that the adjustable nozzle expands from its minimum diameter state to its maximum diameter state, the outer lower adjusting plate 9 does not disengage from the existing gap between the outer adjusting plate 8 and hooks A2, B3, and C4. A hook D5 with L-shaped ends is riveted to the axial position of the outer adjusting plate 8. A shim 6 and a plate 7 are riveted to the opposite side of the outlet section of the outer lower adjusting plate 9. One end of the L-shaped rod of the hook D5 of the two adjacent 8s spans circumferentially between the outer lower adjusting plate 9 and the plate 7, so that the distance between the two ends of the hook D5 is the maximum expansion state that the two adjacent outer lower adjusting plates 9 can expand.

[0039] When the adjustable nozzle expands to its maximum diameter, the L-shaped rod structure at both ends of the hook D5 contacts the pad 6 of the outer lower adjusting plate 9 to achieve lateral limiting. At the same time, the plate 7 of the outer lower adjusting plate 9 contacts the hook D5 to achieve longitudinal limiting. This ensures that the overlapping edges of the outer adjusting plate 8 and the outer lower adjusting plate 9 always overlap and will not come off, always forming a complete envelope surface to obtain a reliable maximum diameter nozzle state, thereby ensuring the safe and reliable performance of the adjustable nozzle during operation.

Claims

1. A limiting structure assembly for the outer / lower outer adjustment plates of an adjustable nozzle for an aero-engine, comprising a plurality of outer adjustment plates (8) and outer lower adjustment plates (9) fixedly on a support ring (1) at circumferential intervals, characterized in that: The outer adjusting piece (8) and the outer lower adjusting piece (9) are riveted together by hooks A (2), B (3), and C (4), and are connected at the tail ends of the outer adjusting piece (8) and the outer lower adjusting piece (9) by a limiting structure; the outer lower adjusting piece (9) is provided with a plate (7), which is connected to the outer lower adjusting piece (9) by a gasket (6), and a gap is formed between the plate (7) and the outer lower adjusting piece (9) by the gasket (6); the limiting structure includes a hook D (5), one end of which is connected to the outer adjusting piece (8), and the other end overlaps in the gap; The front end of the outer adjustment piece (8) is connected to the support ring (1) by a screw, and an outer lower adjustment piece (9) is inserted between every two adjacent outer adjustment pieces (8); the front end of the outer lower adjustment piece (9) is connected to the support ring (1) by a screw, covering the gap between two adjacent outer adjustment pieces (8); both ends of the hook D (5) are L-shaped. The outlet section of the lower outer adjustment plate (9) is provided with plates (7) on both sides. One end of the hook D (5) on the adjacent lower outer adjustment plate (8) overlaps with the plates (7) on both sides through the gap formed by the gasket (6) and the lower outer adjustment plate (9); the length of the gasket (6) is less than the length of the plate (7).

2. The adjustable nozzle outer / lower outer adjustment tab limiting structure assembly for an aero-engine as described in claim 1, characterized in that: The hooks A (2), B (3), and C (4) are connected to the outer adjusting piece (8) and the outer lower adjusting piece (9) by rivets.

3. The adjustable nozzle outer / lower outer adjustment tab limiting structure assembly for an aero-engine as described in claim 1, characterized in that: The hook D (5) is riveted to the axial position of the outer adjusting piece (8).

4. The adjustable nozzle outer / lower outer adjustment tab limiting structure assembly for an aero-engine as described in claim 1, characterized in that: The gasket (6) and plate (7) are connected to the outer lower adjusting piece (9) by rivets.

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