A hinge bracket for a pw1100 aero engine

Abstract

The present application belongs to the technical field of aero-engines, and discloses a hinge support for a PW1100 aero-engine, which comprises a support main body, wherein the support main body comprises a mounting portion and a pressure connection portion connected with each other, and the pressure connection portion is arranged at an included angle with the mounting portion. The mounting portion is rotationally arranged at a mounting hole, and the pressure connection portion is detachably stacked on an end face of a rubber sealing strip away from a web-shaped door, and a first end of the pressure connection portion is pressure-connected to a limiting portion. The rigid pressure connection portion pressure-connects the limiting portion to a hanger apron, so that the closed positioning of the web-shaped door is no longer limited by the mechanical properties of the rubber sealing strip, effectively avoiding the deformation, curling, slipping and other failure risks of the rubber sealing strip under the coupling action of high-speed airflow and high-frequency vibration, eliminating the hidden danger of accidental opening of the web-shaped door caused by the failure of the rubber sealing strip from the structural principle, and significantly improving the closed reliability and anti-disturbance ability of the web-shaped door under complex aerodynamic load and vibration environment.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and more particularly to a hinge bracket for a PW1100 aero-engine. Background Technology

[0002] The PW1100 aero engine is a twin-rotor geared turbofan engine, primarily used as the power plant for the Airbus A320neo family of aircraft. The engine mainly consists of an air intake, fan cowling, thrust reversers, core cowling, and exhaust system. The web-shaped doors are the core component of the thrust reversers, enabling the switching of airflow direction.

[0003] Currently, the finned doors are mounted to the engine block via hinged brackets, relying solely on the overlap between the rubber sealing strip and the pylon skirt for closure and restraint. During high-altitude, high-speed flight, the area containing the finned doors is continuously subjected to external aerodynamic loads and is constantly exposed to high-frequency vibrations. Under the coupling effect of airflow and vibration, the rubber sealing strip is prone to elastic deformation, curling, displacement, or even slippage, failing to maintain an effective overlap and thus losing its restraint on the finned doors. This can lead to accidental opening of the finned doors without manual intervention. If ground maintenance personnel fail to detect such accidental opening, the support bracket below the finned door is highly susceptible to rigid interference with the pylon skirt, directly causing plastic deformation of the support bracket, scratches and cracks on the thrust skirt, and structural damage, increasing maintenance costs and downtime. Furthermore, if the finned doors accidentally open during flight, they are easily noticed by passengers in the cabin, potentially causing unease and anxiety, and negatively impacting the flight experience. Summary of the Invention

[0004] The purpose of this invention is to provide a hinge bracket for the PW1100 aero engine, which enables the assembly of the web-shaped door while improving the stability of the web-shaped door and effectively preventing accidental opening of the web-shaped door.

[0005] To achieve this objective, the present invention adopts the following technical solution: A hinge bracket for a PW1100 aero engine is provided. The side of the pylon skirt of the PW1100 aero engine is provided with a mounting hole for mounting a web-shaped door. The web-shaped door is rotatably disposed at the mounting hole. A rubber sealing member is stacked on the inner peripheral wall of the web-shaped door. The rubber sealing member has a limiting part that abuts against the inner wall of the pylon skirt. The hinge bracket includes a bracket body, which includes a connected mounting part and a pressing part. The pressing part and the mounting part are arranged at an angle. The mounting part is rotatably disposed at the mounting hole. The pressing part is detachably stacked on the end face of the rubber sealing member away from the web-shaped door, and the first end of the pressing part is pressed against the limiting part.

[0006] As an optional hinge bracket, the included angle between the mounting part and the pressing part is α, where 85°≤α≤87°.

[0007] As an optional solution for the hinge bracket, the pressing part has a first side, a second side and a third side, wherein the first side and the third side are arranged opposite to each other and are both connected to the second side; A clearance notch is provided at the apex formed by the connection between the first side and the second side.

[0008] As an alternative to the hinge bracket, the radius of the clearance notch is 0.3 inches to 0.4 inches.

[0009] As an optional hinge bracket, the hinge bracket includes a first hinge bracket and a second hinge bracket. Along the heading direction of the aircraft, the distance between the first hinge bracket and the nose is smaller than the distance between the second hinge bracket and the nose. Wherein, the length of the portion of the second side of the first hinge bracket without the clearance notch is 1.36 inches to 1.4 inches; The length of the portion of the second side of the second hinge bracket without the clearance notch is 1.38 inches to 1.5 inches.

[0010] As an optional hinge bracket, the total length of the crimping portion of the first hinge bracket is 2.25 inches to 2.5 inches.

[0011] As an optional hinge bracket, the angle between the third side and the second side of the first hinge bracket is 90°, and the angle between the third side and the second side of the second hinge bracket is 83°~86°.

[0012] As an optional hinge bracket, the total width of the crimping portion of the first hinge bracket is 0.8 inches to 0.9 inches.

[0013] As an optional hinge bracket, the mounting part includes a first plate and a second plate, the extension direction of the first plate and the extension direction of the second plate are set at an angle, the first plate is hinged to the mounting hole, and the second plate is connected between the first plate and the pressing part. The first plate has a first side edge, and the second plate has a second side edge; The first hinge bracket has a first side edge with a length of 1.1 to 1.2 inches and a second side edge with a length of 2.2 to 2.3 inches; the second hinge bracket has a first side edge with a length of 0.8 to 0.9 inches and a second side edge with a length of 2.15 to 2.3 inches.

[0014] As an optional hinge bracket, in the first hinge bracket, the included angle between the first side edge and the second side edge is 152°~155°; In the second hinge bracket, the included angle between the first side edge and the second side edge is 145°~147°.

[0015] The beneficial effects of this invention are: This invention provides a hinge bracket for a PW1100 aero-engine. The hinge bracket includes a bracket body, which includes a connected mounting portion and a pressing portion, with the pressing portion and mounting portion arranged at an angle. The mounting portion is rotatably mounted at a mounting hole, and the pressing portion is detachably stacked on the end face of the rubber sealing strip away from the web-shaped door, with the first end of the pressing portion pressing against a limiting portion. The rigid pressing portion presses the limiting portion against the hanger skirt, so that the closing positioning of the web-shaped door is no longer limited by the mechanical properties of the rubber sealing strip material. This effectively avoids the risk of deformation, curling, and slippage of the rubber sealing strip under the coupling effect of high-speed airflow and high-frequency vibration. From a structural principle perspective, it eliminates the hidden danger of accidental opening of the web-shaped door due to rubber sealing strip failure, significantly improving the closing reliability and anti-disturbance capability of the web-shaped door under complex aerodynamic loads and vibration environments.

[0016] Furthermore, this hinge bracket is made of the same base material as the original hinge bracket to ensure that its overall stiffness, strength, and fatigue performance remain equivalent to the original hinge bracket, thus meeting the strength requirements, assembly requirements, and airworthiness requirements of the aero-engine nacelle structure. Simultaneously, the hinge bracket proposed in this embodiment does not require changes to the original installation interface, assembly relationship, or overall dimensions during installation, enabling in-situ installation without additional modifications to the nacelle, pylon, web-like door, or surrounding structures. It possesses excellent interchangeability, feasibility, and engineering practicality. Attached Figure Description

[0017] Figure 1 This is an isometric view of a portion of the structure of the hinge bracket provided in the specific embodiments of the present invention when applied to the PW1100 aero engine; Figure 2 This is another isometric view of a portion of the structure of the hinge bracket provided in the specific embodiment of the present invention when applied to the PW1100 aero engine; Figure 3 This is an exploded view of a portion of the structure of the hinge bracket provided in the specific embodiment of the present invention when applied to the PW1100 aero engine; Figure 4 This is a side view of the first hinge bracket provided in a specific embodiment of the present invention; Figure 5 This is a plan view of the first hinge bracket provided in a specific embodiment of the present invention; Figure 6 This is a side view of the second hinge bracket provided in a specific embodiment of the present invention; Figure 7 This is a plan view of the second hinge bracket provided in a specific embodiment of the present invention.

[0018] In the picture: 100. Hanging skirt panel; 200. Web-shaped door; 300. Rubber sealing parts; 400. Bracket support plate; 1. Main support structure; 11. Mounting section; 111. First plate; 1111. First side edge; 1112. Third side edge; 112. Second plate; 1121. Second side edge; 1122. Fourth side edge; 12. Crimping part; 121. First side; 122. Second side; 123. Third side; 13. Avoid gaps; 2. First hinge bracket; 3. Second hinge bracket. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 7 As shown, this invention provides a hinge bracket for a PW1100 aero engine. The PW1100 aero engine is a dual-rotor geared turbofan engine, primarily used as the power plant for the Airbus A320neo series aircraft. The engine mainly consists of an air intake, fan cowling, thrust reverser, core cowling, and exhaust system, among which the web-shaped door 200 is the core component in the thrust reverser that enables airflow direction switching.

[0024] The PW1100 aircraft engine's pylon skirt 100 has a mounting hole on one side for installing a web-shaped door 200. The web-shaped door 200 is rotatably mounted at the mounting hole, and a rubber sealing element 300 is stacked on the inner peripheral wall of the web-shaped door 200. The rubber sealing element 300 has a limiting part that abuts against the inner wall of the pylon skirt 100. In the prior art, the web-shaped door 200 is installed at the mounting hole via a hinge bracket, and the overlap and limiting of the pylon skirt 100 are achieved solely by the limiting part of the rubber sealing strip. When the aircraft is flying at high altitude and high speed, the area where the web-shaped door 200 is located is continuously subjected to external aerodynamic loads and is in a high-frequency vibration environment for a long time. Under the coupling effect of airflow and vibration, the rubber sealing strip is prone to elastic deformation, curling, displacement, or even slippage, failing to maintain an effective overlap state, and thus losing its limiting constraint on the web-shaped door 200, causing the web-shaped door 200 to open unexpectedly without manual operation. If the flip-door 200 opens unexpectedly and ground maintenance personnel fail to detect it in time, the support below it is highly likely to rigidly interfere with the pylon skirt 100, directly causing plastic deformation of the support, scratches and cracks on the thrust skirt, and structural damage, increasing maintenance costs and downtime. Furthermore, if the flip-door 200 opens unexpectedly during flight, it is easily noticed by passengers in the cabin, potentially causing unease and anxiety and affecting the flight experience.

[0025] The hinge bracket includes a bracket body 1, which includes a connected mounting part 11 and a pressing part 12. The pressing part 12 is set at an angle to the mounting part 11. The mounting part 11 is rotatably mounted at the mounting hole. The pressing part 12 is detachably stacked on the end face of the rubber sealing strip away from the web-shaped door 200, and the first end of the pressing part 12 is pressed against the limiting part. The rigid pressing part 12 presses the limiting part against the hanger skirt 100, so that the closing positioning of the web-shaped door 200 is no longer limited by the mechanical properties of the rubber sealing strip material. This effectively avoids the risk of deformation, curling, slippage, and other failures of the rubber sealing strip under the coupling effect of high-speed airflow and high-frequency vibration. From a structural principle perspective, this eliminates the hidden danger of the web-shaped door 200 being accidentally opened due to the failure of the rubber sealing strip, and significantly improves the closing reliability and anti-disturbance capability of the web-shaped door 200 under complex aerodynamic loads and vibration environments.

[0026] Furthermore, this hinge bracket is made of the same base material as the original hinge bracket to ensure that its overall stiffness, strength, and fatigue performance are equivalent to the original hinge bracket, thus meeting the strength requirements, assembly requirements, and airworthiness requirements of the aero-engine nacelle structure. At the same time, the hinge bracket proposed in this embodiment does not require changes to the original installation interface, assembly relationship, or overall dimensions during installation, enabling in-situ installation without additional modifications to the nacelle, pylon, web-shaped door 200, or surrounding structures. It possesses excellent interchangeability, feasibility, and engineering practicality.

[0027] Specifically, each web-shaped door 200 is provided with two hinge brackets. The hinge brackets provided in this embodiment include a first hinge bracket 2 and a second hinge bracket 3. Along the flight direction of the aircraft, the distance between the first hinge brackets and the nose is smaller than the distance between the second hinge brackets 3. That is, the first hinge brackets 2 are closer to the nose of the aircraft.

[0028] The included angle between the mounting part 11 and the pressing part 12 between the first hinge bracket 2 and the second hinge is α, 85°≤α≤87°, which ensures that the hinge bracket can be stably installed at the mounting hole and will not interfere with the surrounding structure.

[0029] Exemplarily, in this embodiment, reference is made to Figure 4 The included angle α1 between the mounting portion 11 and the pressing portion 12 of the first hinge is 85°, as shown in the reference. Figure 6 The included angle α2 between the mounting part 11 and the pressing part 12 of the second hinge bracket 3 is also 85°.

[0030] More specifically, two bracket support plates 400 are provided at intervals at the mounting holes, and the mounting parts 11 of the two hinge brackets are hinged to the two bracket support plates 400 in a one-to-one correspondence.

[0031] Optionally, the crimping portion 12 has a first side 121, a second side 122, and a third side 123. The first side 121 and the third side 123 are arranged opposite to each other and are both connected to the second side 122. An avoidance notch 13 is provided at the apex corner formed at the connection between the first side 121 and the second side 122. After the crimping portion 12 is crimped onto the rubber sealing strip, the rubber sealing strip will undergo compression deformation and lateral expansion. The avoidance notch 13 can provide a buffer area for the expanded rubber sealing strip, ensuring that the rubber sealing strip can stretch freely, thereby greatly reducing the pressing resistance and ensuring that the internal structure of the rubber sealing strip is not damaged.

[0032] Specifically, the radius of the clearance notch 13 is 0.3 inches to 0.4 inches. Figure 5 The radius R1 in Figure 6The radius R2 in all of them is 0.3 inches to 0.4 inches. The clearance notch 13 within this size range provides sufficient buffer space for the rubber sealing strip to expand laterally under pressure, effectively preventing tearing or extrusion caused by stress concentration. In addition, the arc-shaped notch within this size range is relatively easy to process, taking into account both structural strength and processing cost.

[0033] For example, in this embodiment, the radius of the clearance notch 13 of both the first hinge bracket 2 and the second hinge bracket 3 is 0.4 inches.

[0034] Furthermore, the connection points between the curved notch and the first side 121, and between the curved notch and the second side 122, both employ a rounded chamfer design instead of sharp corners to avoid stress concentration or scratches / damage to the rubber sealing strip caused by sharp corners. For example, the radius of the rounded chamfer is 0.1 inches.

[0035] Furthermore, the total length of the pressing portion 12 of the first hinge bracket 2 is 2.25 inches to 2.5 inches, and the total width is 0.8 inches to 0.9 inches. The length of the portion of the second side 122 of the first hinge bracket 2 without the clearance notch 13 is 1.36 inches to 1.4 inches. That is... Figure 5 In the figure, A1 is 1.36 inches to 1.4 inches, B1 is 2.25 inches to 2.5 inches, and C1 is 0.8 inches to 0.9 inches.

[0036] The length of the portion of the second side 122 of the second hinge bracket 3 without the clearance notch 13 is 1.38 inches to 1.5 inches, and the length of the third side 123 and the portion of the mounting part 11 is 0.5 inches to 0.6 inches, i.e. Figure 7 In the figure, A2 is 1.38 inches to 1.5 inches, and F is 0.5 inches to 0.6 inches.

[0037] The above-mentioned dimensional settings ensure that the first end of the crimping part 12 can be crimped onto the limiting part of the rubber sealing strip, while also preventing the crimping part 12 from interfering with the surrounding structure.

[0038] For example, in this embodiment, the total length of the crimping portion 12 of the first hinge bracket 2 is 2.25 inches and the total width is 0.83 inches. The length of the portion of the second side 122 of the first hinge bracket 2 without the clearance notch 13 is 1.36 inches, and the length of the portion of the second side 122 of the second hinge bracket 3 without the clearance notch 13 is 1.38 inches.

[0039] Furthermore, the angle between the third side 123 and the second side 122 of the first hinge bracket 2 is 90°, and the angle between the third side 123 and the second side 122 of the second hinge bracket 3 is 83°~86°. Figure 5 β1 is 90°. Figure 7The β2 in the range is 83°~86°.

[0040] For example, in this embodiment, the included angle between the third side 123 and the second side 122 of the second hinge bracket 3 is 85°.

[0041] In addition, in this embodiment, the connection between the second side 122 and the third side 123 also adopts a rounded chamfer design to prevent scratches or damage to the rubber sealing strip caused by sharp corners. For example, the radius of the rounded chamfer at the connection between the second side 122 and the third side 123 is 0.2 inches.

[0042] Optionally, the mounting portion 11 includes a first plate 111 and a second plate 112. The extending direction of the first plate 111 and the extending direction of the second plate 112 are set at an angle. The first plate 111 is hinged to the bracket support plate 400 at the mounting hole, and the second plate 112 is connected between the first plate 111 and the pressing portion 12. The first plate 111 has a first side edge 1111, and the second plate 112 has a second side edge 1121.

[0043] In this design, the first side edge 1111 of the first hinge bracket 2 has a length of 1.1 inches to 1.2 inches, and the second side edge 1121 has a length of 2.2 inches to 2.3 inches; the first side edge 1111 of the second hinge bracket 3 has a length of 0.8 inches to 0.9 inches, and the second side edge 1121 has a length of 2.15 inches to 2.3 inches. Figure 5 In this context, D1 is 1.1 inches to 1.2 inches, and E1 is 2.2 inches to 2.3 inches. Figure 7 The D2 is 0.8 inches to 0.9 inches, and the E2 is 2.15 inches to 2.3 inches.

[0044] Furthermore, the connection between the first side edge 1111 and the second side edge 1121 is provided with an arc-shaped chamfer, the radius of which is 0.6 inches to 0.7 inches. For example, in this embodiment, the radius of the arc-shaped chamfer at the connection between the first side edge 1111 and the second side edge 1121 is 0.65 inches.

[0045] Furthermore, in the first hinge bracket 2, the included angle between the first side edge 1111 and the second side edge 1121 is 152°~155°, that is... Figure 5 In the second hinge bracket 3, γ1 is 152°~155°; the included angle between the first side edge 1111 and the second side edge 1121 is 145°~147°. Figure 7 The γ2 in the range is 145°~147°.

[0046] For example, in this embodiment, in the mounting portion 11 of the first hinge bracket 2, the length of the first side edge 1111 is 1.14 inches, the length of the second side edge 1121 is 2.25 inches, and the included angle between the first side edge 1111 and the second side edge 1121 is 153°; in the mounting portion 11 of the second hinge bracket 3, the length of the first side edge 1111 is 0.89 inches, the length of the second side edge 1121 is 2.15 inches, and the included angle between the first side edge 1111 and the second side edge 1121 is 147°.

[0047] Specifically, the first plate 111 also has a third side edge 1112, which is disposed opposite to the first side edge 1111; the second plate 112 also has a fourth side edge 1122, which is disposed opposite to the second side edge 1121. The length of the third side edge 1112 of the first hinge bracket 2 is 0.95 inches to 1.0 inch; the length of the third side edge 1112 of the second hinge bracket 3 is 0.6 inches to 0.7 inches. Figure 5 The G1 in this context is 0.95 inches to 1.0 inches. Figure 7 The G2 in the text is 0.6 inches to 0.7 inches.

[0048] For example, in this embodiment, the length of the third side edge 1112 of the first hinge bracket 2 is 0.98 inches, and the length of the third side edge 1112 of the second hinge bracket 3 is 0.65 inches.

[0049] Accordingly, the first side edge 1111 and the third side edge 1112 of the first hinge bracket 2 and the second hinge bracket 3 are respectively connected by an arc-shaped transition, and the radius of the arc transition is 0.3 inches to 0.4 inches. For example, in this embodiment, the radius of the arc transition is 0.34 inches.

[0050] In addition, in the first hinge bracket 2, the included angle between the second side edge 1121 of the second plate 112 and the first side 121 of the pressing part 12 is θ1, 107°≤θ1≤110°, and the included angle between the third side edge 1112 of the first plate 111 and the third side 123 of the pressing part 12 is 75°~77°; in the second hinge bracket 3, the included angle between the second side edge 1121 of the second plate 112 and the first side 121 of the pressing part 12 is θ2, 110°≤θ2≤113°, and the included angle between the third side edge 1112 of the first plate 111 and the third side 123 of the pressing part 12 is 60°~63°. For example, in this embodiment, θ1=108°, θ2=111°; the included angle between the third side edge 1112 and the third side 123 of the first hinge bracket 2 is 76°, and the included angle between the third side edge 1112 and the third side 123 of the second hinge bracket 3 is 62°.

[0051] The aforementioned dimensional settings for the mounting section 11 ensure stable installation of the hinge bracket and smooth opening of the web-shaped door 200 when the airflow direction changes, while also preventing interference between the hinge bracket and other surrounding structures. Furthermore, compared to existing hinge brackets, no modifications to the holes at other mounting locations are required, offering strong interchangeability and ease of engineering implementation.

[0052] Specifically, each aircraft requires two left-side thrust reverser hinge access panels and two right-side thrust reverser hinge access panels, meaning each aircraft needs four web-shaped doors 200. Each web-shaped door 200 is equipped with one first hinge bracket 2 and one second hinge bracket 3, for a total of eight hinge brackets. Calculations show that the total cost of original factory-installed modification materials is US$3,720,672, while the total cost of modification materials using the hinge brackets provided in this embodiment is RMB 96,000. The labor cost for original factory-installed modification is RMB 50,634.24, while the labor cost for modification using the hinge brackets provided in this embodiment is RMB 75,951.53. Using an exchange rate of 1 US dollar to 7.18 RMB, the hinge brackets provided in this embodiment can save a total of approximately RMB 26,593,107.67 compared to the original factory-installed modification solution, demonstrating significant economic benefits.

[0053] Furthermore, through motion simulation analysis of the web-shaped door 200, combined with measured data analysis of the surrounding structure, and conducting pre-installation and reverse thrust opening tests on the ground, the extension of the first end of the hinge bracket was optimized and verified multiple times. Ultimately, an extension of 0.9 inches (22.86 mm) was determined to be the optimal extension size compared to existing hinge brackets. This size, while ensuring reliable limiting, can prevent motion interference between the nacelle reverse thrust and related components, and does not require changes to the overall assembly form.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. 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 claims of the present invention.

Claims

1. A hinge bracket for a PW1100 aircraft engine, wherein a mounting hole for mounting a web-shaped door (200) is provided on one side of the gantry skirt (100) of the PW1100 aircraft engine, the web-shaped door (200) is rotatably disposed at the mounting hole, and a rubber sealing member (300) is stacked on the inner peripheral wall of the web-shaped door (200), the rubber sealing member (300) having a limiting part that abuts against the inner wall of the gantry skirt (100); Its features are, The hinge bracket includes a bracket body (1), which includes a connected mounting part (11) and a crimping part (12). The crimping part (12) is set at an angle to the mounting part (11). The mounting part (11) is rotatably disposed at the mounting hole. The crimping part (12) is detachably stacked on the end face of the rubber sealing member (300) away from the web-shaped door (200), and the first end of the crimping part (12) is crimped to the limiting part.

2. The hinge bracket according to claim 1, characterized in that, The included angle between the mounting part (11) and the crimping part (12) is α, where 85°≤α≤87°.

3. The hinge bracket according to claim 1, characterized in that, The crimping part (12) has a first side (121), a second side (122) and a third side (123), the first side (121) and the third side (123) are arranged opposite to each other and are both connected to the second side (122); A clearance notch (13) is provided at the apex formed by the connection between the first side (121) and the second side (122).

4. The hinge bracket according to claim 3, characterized in that, The radius of the clearance notch (13) is 0.3 inches to 0.4 inches.

5. The hinge bracket according to claim 3, characterized in that, The hinge bracket includes a first hinge bracket (2) and a second hinge bracket (3). Along the heading direction of the aircraft, the distance between the first hinge bracket (2) and the nose is smaller than the distance between the second hinge bracket (3) and the nose. The length of the portion of the second side (122) of the first hinge bracket (2) without the clearance notch (13) is 1.36 inches to 1.4 inches. The length of the portion of the second side (122) of the second hinge bracket (3) without the clearance notch (13) is 1.38 inches to 1.5 inches.

6. The hinge bracket according to claim 5, characterized in that, The total length of the crimping portion (12) of the first hinge bracket (2) is 2.25 inches to 2.5 inches.

7. The hinge bracket according to claim 5, characterized in that, The angle between the third side (123) and the second side (122) of the first hinge bracket (2) is 90°, and the angle between the third side (123) and the second side (122) of the second hinge bracket (3) is 83°~86°.

8. The hinge bracket according to claim 5, characterized in that, The total width of the crimping portion (12) of the first hinge bracket (2) is 0.8 inches to 0.9 inches.

9. The hinge bracket according to claim 5, characterized in that, The mounting part (11) includes a first plate (111) and a second plate (112). The extension direction of the first plate (111) is set at an angle to the extension direction of the second plate (112). The first plate (111) is hinged to the mounting hole, and the second plate (112) is connected between the first plate (111) and the crimping part (12). The first plate (111) has a first side edge (1111), and the second plate (112) has a second side edge (1121). The length of the first side edge (1111) of the first hinge bracket (2) is 1.1 inches to 1.2 inches, and the length of the second side edge (1121) is 2.2 inches to 2.3 inches; the length of the first side edge (1111) of the second hinge bracket (3) is 0.8 inches to 0.9 inches, and the length of the second side edge (1121) is 2.15 inches to 2.3 inches.

10. The hinge bracket according to claim 9, characterized in that, In the first hinge bracket (2), the included angle between the first side edge (1111) and the second side edge (1121) is 152°~155°; In the second hinge bracket (3), the included angle between the first side edge (1111) and the second side edge (1121) is 145°~147°.

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