An auxiliary intake valve

Abstract

The application belongs to the field of aviation technology, and particularly relates to an auxiliary air inlet valve, which comprises: an air inlet valve overall mouth frame located on an air inlet channel side wall and forming an auxiliary air inlet; an air inlet channel side wall fixing piece located on the inner side of an outer skin and used for supporting and fixing a double lug joint; the double lug joint has a double lug structure, and the lug hole of the double lug structure has a rotating shaft, and the axis of the rotating shaft is parallel to the plane of the auxiliary air inlet; the air inlet valve has a single lug joint at one end, the single lug joint is hinged on the rotating shaft through the single lug hole thereof, when the air inlet valve rotates outward by a certain angle along the rotating shaft, the edge of the air inlet valve is overlapped with the inner edge of the air inlet valve overall mouth frame, and when the air inlet valve rotates inward by another certain angle along the rotating shaft, the single lug joint is in contact with the limiting device of the double lug joint.

Description

Technical Field

[0001] This application belongs to the field of aviation technology, and specifically relates to an auxiliary air intake valve. Background Technology

[0002] The air intake is a crucial part of ensuring the normal operation of an engine. Improper design can easily lead to insufficient air intake, surge, or damage to engine blades from falling screws. To compensate for insufficient air intake during afterburner operation, auxiliary air intake valves are designed on both sides of the air intake, primarily providing auxiliary air intake channels for the engine. During takeoff or landing on the ground, the engine draws air out, and the suction force on the inner wall of the air intake automatically opens the auxiliary air intake valves inward. During high-speed flight, the pressure on the inner wall of the air intake automatically closes the auxiliary air intake valves. These valves must open and close flexibly and be interchangeable.

[0003] Due to acoustic fatigue, vibration, and abnormal engine operation (when the engine experiences knocking, surge, or other abnormal operation, the load inside the intake manifold will suddenly increase, which may lead to structural damage), cracks may appear in structures such as auxiliary intake valves and intake frames during use, and even bolt breakage or nail loss may occur. Therefore, solving the problem of intake valve vibration fatigue is a major challenge in its design. Summary of the Invention

[0004] To address the aforementioned problems, this application provides an auxiliary intake valve, comprising:

[0005] The intake valve frame is located on the side wall of the intake duct, forming an auxiliary intake port;

[0006] The intake duct sidewall fastener, located inside the outer skin, is used to support and fix the double-ear connector;

[0007] The dual-ear connector has a dual-ear structure, and the ear holes of the dual-ear structure have a rotating shaft, with the axis of the rotating shaft parallel to the plane of the auxiliary air inlet.

[0008] The intake valve has a single-ear connector at one end. The single-ear connector is hinged to the rotating shaft through its single-ear hole. When the intake valve rotates outward along the rotating shaft at a certain angle, the edge of the intake valve overlaps with the inner edge of the intake valve frame. When the intake valve rotates inward along the rotating shaft at another certain angle, the single-ear connector and the double-ear connector have a limiting device for contact and limitation.

[0009] Preferably, the edge of the intake valve has a circumferential stepped surface for overlapping with the inner side of the overall intake valve frame.

[0010] Preferably, wear-resistant paint is applied between the stepped surface of the intake valve and the overall intake valve frame.

[0011] Preferably, a support plate is placed between the double-ear connector and the intake sidewall fixing component.

[0012] Preferably, the single-ear connector is fixed to the intake valve by multiple bolts.

[0013] Preferably, the limiting device includes a pivot pin disposed between the two ear structures and a rubber ring fitted on the outer surface of the pivot pin.

[0014] Preferably, the ear canals of the double-ear structure are fitted with bushings, and a vibration-damping rubber ring is placed between the bushings and the ear canal wall.

[0015] Preferably, the single-ear connector is fitted onto the rotating shaft via a spherical bearing.

[0016] The advantages of this application include: This application is designed for aircraft with auxiliary air intake valves, and the vibration reduction design ensures that the auxiliary air intake valve reduces vibration fatigue during the supplementary air intake process, while also reducing weight, occupying less space, and having a lower cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an auxiliary intake valve according to this application;

[0018] Figure 2 This is a cross-sectional view of an auxiliary intake valve according to this application;

[0019] Figure 3 This is an axial view of the air intake duct in this application. Detailed Implementation

[0020] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0021] like Figures 1-3 As shown, it includes:

[0022] The intake valve integral frame 1 is located on the side wall of the intake duct, forming an auxiliary intake port;

[0023] The intake sidewall fastener 7 is located inside the outer skin 9 and is used to support and fix the double-ear connector 10.

[0024] The dual-ear connector 10 has a dual-ear structure, and the ear holes of the dual-ear structure have a rotating shaft 6, the axis of the rotating shaft 6 being parallel to the plane of the auxiliary air inlet.

[0025] The intake valve 12 has a single-ear connector 11 at one end, which is hinged to the rotating shaft 6 through a single ear hole. When the intake valve 12 rotates outward along the rotating shaft 6 by a certain angle, the edge of the intake valve 12 overlaps with the inner edge of the intake valve frame 1. When the intake valve 12 rotates inward along the rotating shaft 6 by another certain angle, the single-ear connector 11 contacts and limits the limiting device of the double-ear connector 10. Preferably, the edge of the intake valve 12 has a circumferential stepped surface for overlapping with the inner side of the intake valve frame 1. The intake valve 12 can be driven by a drive device or preloaded by an elastic element to enter a normally closed state, and opened by the pressure of the airflow itself when a large amount of airflow is required.

[0026] The intake valve frame 1 is a single piece, and the outer skin 9 is riveted to the intake valve frame 1 to prevent poor rigidity of the sheet metal riveting assembly. Too many rivets can easily fall into the intake manifold and damage the engine blades.

[0027] The auxiliary intake valve opens as the engine's intake air volume increases. The opening angle is determined by the engine's intake air volume requirements, and a limiting device restricts the opening angle. A pivot pin 4 is designed on the double-ear connector 10, and a rubber ring 5 is fitted onto the pivot pin 4. The single-ear connector 11 and the intake valve 12 rotate around the pivot 6. The single-ear connector 11 stops when it contacts the pivot pin 4, at which point the intake valve 12 is at its maximum opening. Adjusting the diameter of the rubber ring 5 facilitates the adjustment of the intake valve 12 opening.

[0028] Preferably, wear-resistant paint 2 is applied between the stepped surface of the intake valve 12 and the overall intake valve frame 1, specifically at the contact and impact point between the auxiliary intake valve 12 and the overall intake valve frame 1.

[0029] Preferably, a support plate 8 is placed between the double-ear connector 10 and the intake sidewall fixing member 7.

[0030] Preferably, the single-ear connector 11 is fixed to the intake valve 12 by multiple bolts 3.

[0031] Preferably, a bushing 15 is fitted inside the ear canal of the double-ear structure, and a vibration-damping rubber ring 13 is provided between the bushing 15 and the ear canal wall. When the flowing air causes disturbance, the rubber ring 13 is subjected to tensile and compressive deformation. Because the rubber ring 13 has a large stress-strain hysteresis effect, it consumes vibration energy, reduces the vibration amplitude, and plays a role in vibration damping.

[0032] Preferably, the single-ear connector 11 is mounted on the rotating shaft 6 via a spherical bearing 14. The spherical bearing 14 on the single-ear connector allows for flexible movement and correction of misalignment. The rotating shaft is interference-fitted with the inner ring of the bearing on the single ear and the inner hole of the bushing on the double ear, ensuring that the rotating shaft will not be twisted and is less likely to break.

[0033] The structure of this application facilitates control of movement clearance and has a compact layout. In this design, the pivot is close to the inner side of the intake duct, and the inner side of the intake valve 12 is transitioned by a curve. The reinforcing ribs of the overall intake valve frame 1 are arranged obliquely to reduce airflow resistance and avoid movement interference.

[0034] This application is for aircraft with auxiliary air intakes. The vibration reduction design ensures that the auxiliary air intake reduces vibration fatigue during the supplementary air intake process, while also reducing weight, occupying less space, and having a lower cost.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An auxiliary intake valve, characterized in that, include: The intake valve integral frame (1) is located on the side wall of the intake passage, forming an auxiliary intake port; The intake sidewall fastener (7) is located inside the outer skin (9) and is used to support and fix the double-ear connector (10). The double-ear connector (10) has a double-ear structure, and the ear holes of the double-ear structure have a rotating shaft (6), the axis of the rotating shaft (6) is parallel to the plane of the auxiliary air inlet; The intake valve (12) has a single-ear connector (11) at one end. The single-ear connector (11) is hinged to the rotating shaft (6) through its single-ear hole. When the intake valve (12) rotates outward along the rotating shaft (6) at a certain angle, the edge of the intake valve (12) overlaps with the inner edge of the intake valve frame (1). When the intake valve (12) rotates inward along the rotating shaft (6) at another certain angle, the single-ear connector (11) contacts and limits the limiting device of the double-ear connector (10). A bushing (15) is fitted inside the ear canal of the double ear structure, and a vibration damping rubber ring (13) is provided between the bushing (15) and the ear canal wall. The single-ear connector (11) is fitted onto the rotating shaft (6) via a spherical bearing (14); The edge of the intake valve (12) has a circumferential stepped surface for overlapping with the inner side of the intake valve integral frame (1); Abrasion-resistant paint (2) is applied between the stepped surface of the intake valve (12) and the overall intake valve frame (1); A support plate (8) is placed between the double-ear connector (10) and the intake side wall fixing piece (7); The single-ear connector (11) is fixed to the intake valve (12) by multiple bolts (3); The limiting device includes a pivot pin (4) disposed between the two ear structures and a rubber ring (5) fitted on the outer surface of the pivot pin (4).

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