Follow-up hatch cover, nacelle and tilt rotor aircraft

Abstract

The utility model relates to a follow-up hatch cover, a nacelle and a tilt rotor aircraft, belongs to the technical field of aircrafts, and solves the problems that the appearance of a rotor shaft fairing in the prior art has a bulge, and interference exists between the rotor shaft fairing and the nacelle. The device comprises a hatch cover unit, a hinge unit, a sliding rail unit and a sliding unit, the hinge unit and the sliding unit are arranged at the two ends of the hatch cover unit respectively, the sliding rail unit is arranged on a power cabin, the hinge unit is used for connecting the hatch cover unit with a rotor shaft cabin, and the sliding rail unit is used for connecting the hatch cover unit with the rotor shaft cabin. The sliding unit is used for enabling the hatch cover unit to slide along the sliding rail unit. The cabin cover unit can slide along the sliding rail unit along with rotation of the rotor shaft cabin, and when the aircraft takes off and lands vertically, the cabin cover unit moves towards the power cabin and exposes the sunken part, so that the rotor shaft fairing can be inserted into the sunken part, and interference between the rotor shaft fairing and the power cabin is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aircraft technology, especially relates to a follow-up cabin cover, nacelle and tilt rotor aircraft. BACKGROUND

[0002] The tilt rotor aircraft can realize vertical take-off and landing and fixed-wing flight through rotor tilting.

[0003] Large tilt rotor aircraft usually realizes rotor shaft installation and tilt control through nacelles on both sides of the wing, and the nacelles integrate power, transmission, fuel, equipment and other multi-specialty components, so the space is very compact.

[0004] The skin around the nacelle of a certain large tilt rotor aircraft has a large curvature feature, the shape of the rotor shaft fairing has a bulge, and there is interference between the rotor shaft fairing and the nacelle, which affects the realization of the rotor shaft tilt function. UTILITY MODEL CONTENTS

[0005] In view of the above analysis, the utility model aims to provide a follow-up cabin cover to solve the problems in the prior art that the nacelle skin of the tilt rotor aircraft has a large curvature, the shape of the rotor shaft fairing has a bulge, there is interference between the rotor shaft fairing and the nacelle, and the rotor shaft tilt function is affected.

[0006] The purpose of the utility model is mainly realized through the following technical solutions:

[0007] A follow-up cabin cover, the aircraft comprises a power cabin, a rotor shaft cabin and a rotor shaft fairing, the power cabin is arranged on the wing of the aircraft, the rotor shaft cabin is rotationally connected with the power cabin, and the rotor shaft fairing is arranged on the rotor shaft cabin, the follow-up cabin cover comprises a cabin cover unit, a hinge unit, a slide rail unit and a sliding unit, the hinge unit and the sliding unit are arranged at two ends of the cabin cover unit respectively, the slide rail unit is arranged on the power cabin of the aircraft, the hinge unit is used for connecting the cabin cover unit with the rotor shaft cabin of the aircraft, and the sliding unit is used for sliding the cabin cover unit along the slide rail unit.

[0008] The cabin cover unit can slide along the slide rail unit in the direction of approaching or moving away from the power cabin along with the rotation of the rotor shaft cabin, so as to avoid interference with the rotor shaft fairing of the aircraft.

[0009] Further, the cabin cover unit comprises a cabin cover skin, the cabin cover skin is a curved skin, the cabin cover skin is conformal with the power cabin, and the cabin cover skin can completely cover the recessed part of the power cabin.

[0010] Furthermore, the slide rail unit includes a slide rail seat, a first slide rail, and a second slide rail. The slide rail seat includes a first half seat and a second half seat. The first slide rail is disposed on the first half seat, and the second slide rail is disposed on the second half seat. The first half seat and the second half seat can be combined to clamp the sliding unit in the hollow part.

[0011] Furthermore, the hinge unit includes a support rod and a support rod seat. The support rod seat is disposed on the rotor shaft nacelle. The hinged end of the support rod is hinged to the support rod seat, and the fixed end of the support rod is fixedly connected to the nacelle skin. The support rod seat includes a base body and a support rod groove. The base body is used to connect with the rotor shaft nacelle, and the support rod groove is disposed on the base body. The rod segment between the hinged end and the fixed end of the support rod can be inserted into the support rod groove. The rod segment between the hinged end and the fixed end of the support rod and the support rod groove have a clearance fit with a minimum clearance greater than zero.

[0012] Furthermore, the support rod seat also includes a hinge seat, which is disposed on the seat body. One end of the support rod groove is connected to the hinge seat, and the support rod is hinged to the hinge seat.

[0013] Furthermore, the hatch unit also includes a support, which is fixedly connected to one end of the hatch skin, and the sliding unit is hinged to the support.

[0014] Furthermore, the sliding unit includes a rolling frame, a first roller group, and a second roller group. The rolling frame is hinged to the support. The first roller group and the second roller group are symmetrically arranged on both sides of the rolling frame. The first roller group is used to connect with the first slide rail and can slide along the first slide rail. The second roller group is used to connect with the second slide rail and can slide along the second slide rail. The hatch unit can slide along the first slide rail and the second slide rail.

[0015] Furthermore, the first slide rail includes an upper rolling surface and a lower rolling surface, and the first roller assembly includes a first roller and a second roller, wherein the first roller is used to connect with the upper rolling surface and the second roller is used to connect with the lower rolling surface.

[0016] A nacelle includes a follow-up canopy, a power compartment, and a rotor shaft compartment. The power compartment is mounted on the wing of an aircraft, and the rotor shaft compartment is rotatably connected to the power compartment. The power compartment is used to drive the rotor shaft in the rotor shaft compartment, and the rotor shaft is used to drive the propeller to rotate, thereby driving the tiltrotor aircraft to fly.

[0017] A tiltrotor aircraft, including the nacelle.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) Compared with the prior art, the canopy unit can slide along the slide rail unit as the rotor shaft nacelle rotates; when the aircraft takes off and lands vertically, the canopy unit moves toward the power nacelle and exposes the recessed part, so that the rotor shaft fairing can be inserted into the recessed part, avoiding interference between the rotor shaft fairing and the power nacelle; when the aircraft is in level flight, the canopy unit moves toward the rotor shaft nacelle and covers the recessed part, so that the outer wall of the aircraft nacelle remains streamlined and the air resistance of the aircraft nacelle is reduced.

[0020] (2) The hatch cover of this utility model is a curved skin. The hatch cover is conformal with the engine compartment. The hatch cover can completely cover the recessed part and reduce the air resistance of the engine compartment.

[0021] (3) The slide rail base is a two-piece structure, including a first half and a second half. The first slide rail is set on the first half and the second slide rail is set on the second half. The first half and the second half are combined to hold the sliding unit in the hollow part, which is convenient for assembling and installing the slide rail unit.

[0022] (4) When the rotor shaft nacelle rotates away from the power nacelle, the strut slot can prevent the canopy unit from swinging laterally under the action of aerodynamic force, so as to ensure that the canopy unit still maintains the stability and reliability of the motion mechanism. When the aircraft is in level flight, the strut is inserted into the strut slot to achieve the canopy unit's closing effect and reduce the aerodynamic loss caused by the large gap between the moving parts and the fixed parts.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 A schematic diagram of the overall structure of a tiltrotor aircraft nacelle during level flight;

[0026] Figure 2 A schematic diagram of the overall structure of the nacelle of a tiltrotor aircraft during vertical takeoff and landing;

[0027] Figure 3 A schematic diagram of the overall structure of the spacecraft's follow-up hatch;

[0028] Figure 4 This is a schematic diagram of the overall structure of the hatch unit;

[0029] Figure 5 This is a schematic diagram of the overall structure of the hinge unit;

[0030] Figure 6 A schematic diagram of the overall structure of the slide rail unit and the sliding unit;

[0031] Figure 7 This is a schematic diagram of the overall structure of the sliding unit.

[0032] Figure label:

[0033] 1-Hatch unit; 2-Hinge unit; 3-Slide rail unit; 4-Sliding unit; 11-Hatch skin; 12-Support; 21-Support rod; 22-Support rod seat; 31-Slide rail seat; 32-First slide rail; 41-Roll frame; 42-First roller group; 43-Second roller group; 44-Self-aligning bearing; 100-Power compartment; 200-Rotor shaft compartment; 221-Seat body; 222-Hinge seat; 223-Support rod groove; 300-Rotor shaft fairing; 421-First roller; 422-Second roller. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0035] like Figure 1 and Figure 2 As shown, the tiltrotor aircraft includes a power nacelle 100 and a rotor shaft nacelle 200. The power nacelle 100 is mounted on the wing of the aircraft, and the rotor shaft nacelle 200 is rotatably connected to the power nacelle 100. The power nacelle 100 drives the rotor shaft in the rotor shaft nacelle 200, which in turn drives the propeller to rotate, thus propelling the tiltrotor aircraft into flight. The angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 80° and 100°, enabling vertical takeoff and landing of the tiltrotor aircraft; the angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 170° and 190°, enabling level flight of the tiltrotor aircraft.

[0036] The rotor shaft nacelle 200 includes a rotor shaft fairing 300, which is an arc-shaped bulge protruding from the outer wall of the rotor shaft nacelle 200. To prevent interference between the rotor shaft fairing 300 and the power nacelle 100, the power nacelle 100 includes a recess. When the angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 80° and 100°, the rotor shaft fairing 300 can be inserted into the recess, preventing the rotor shaft fairing 300 from colliding with the power nacelle 100. The recess disrupts the streamlined shape of the aircraft nacelle's outer wall, increasing the aircraft nacelle's air resistance.

[0037] Example 1:

[0038] A specific embodiment of this utility model is as follows: Figure 1 and Figure 3 As shown, a follow-up canopy is disclosed, comprising a canopy unit 1, a hinge unit 2, a slide rail unit 3, and a sliding unit 4. The hinge unit 2 and the sliding unit 4 are respectively disposed at both ends of the canopy unit 1, and the slide rail unit 3 is disposed on the power nacelle 100. The hinge unit 2 is used to connect the canopy unit 1 to the rotor shaft nacelle 200, and the sliding unit 4 is used to allow the canopy unit 1 to slide along the slide rail unit 3. When the rotor shaft nacelle 200 rotates, it can push or pull the canopy unit 1 to slide along the slide rail unit 3. During vertical takeoff and landing of the aircraft, the canopy unit 1 moves towards the power nacelle 100 and exposes the recessed portion, allowing the rotor shaft fairing 300 to be inserted into the recessed portion. During level flight of the aircraft, the canopy unit 1 moves towards the rotor shaft nacelle 200 and covers the recessed portion, keeping the outer wall of the aircraft nacelle streamlined and reducing the air resistance of the aircraft nacelle.

[0039] Preferred, such as Figure 4 As shown, the hatch unit 1 includes a hatch skin 11 and a support 12, with the support 12 fixedly connected to one end of the hatch skin 11.

[0040] Preferably, the hinge unit 2 includes a support rod 21 and a support rod seat 22. The support rod seat 22 is mounted on the rotor shaft nacelle 200. The hinged end of the support rod 21 is hinged to the support rod seat 22, and the fixed end of the support rod 21 is fixedly connected to the other end of the canopy skin 11. When the rotor shaft nacelle 200 rotates toward the power compartment 100, the support rod seat 22 can push the support rod 21 and the canopy skin 11 to slide toward the power compartment 100.

[0041] Preferably, the hatch cover 11 is a curved skin, the hatch cover 11 is conformal to the engine compartment 100, the hatch cover 11 can completely cover the recess and reduce the air resistance of the engine compartment 100.

[0042] Preferred, such as Figure 5 As shown, the support rod seat 22 includes a seat body 221 and a hinge seat 222. The seat body 221 is used to connect with the rotor shaft nacelle 200, and the hinge seat 222 is located at one end of the seat body 221. The support rod 21 and the hinge seat 222 are hinged together by bolts.

[0043] Preferably, the end of the support rod 21 is a double-eared joint, and the hinge seat 222 is a three-eared joint. The support rod 21 and the hinge seat 222 are hinged by bolts. The combination of the double-eared joint and the three-eared joint can not only achieve the stability of force transmission, but also prevent relative torsion after the double-eared joint and the three-eared joint are combined, so that the hatch unit 1 will not deflect or sway under the action of aerodynamic force.

[0044] Preferably, the support rod seat 22 further includes a support rod groove 223, which is disposed on the seat body 221. The rod segment between the hinged end and the fixed end of the support rod 21 can be inserted into the support rod groove 223, achieving a micro-clearance nested fit. When the rotor shaft nacelle 200 rotates away from the power nacelle 100, the support rod groove 223 can prevent the canopy unit 1 from swaying laterally under aerodynamic forces, ensuring that the canopy unit 1 maintains the stability and reliability of the motion mechanism. When the aircraft is in level flight, the rod segment between the hinged end and the fixed end of the support rod 21 is inserted into the support rod groove 223, realizing the closing of the canopy unit 1 and reducing aerodynamic losses caused by large gaps between moving and fixed components. One end of the support rod groove 223 is connected to the hinge seat 222.

[0045] Preferred, such as Figure 4 and Figure 6 As shown, the slide rail unit 3 includes a slide rail seat 31, a first slide rail 32 and a second slide rail (not shown in the figure). The slide rail seat 31 is mounted on the power compartment 100. The slide rail seat 31 includes a hollow part. The first slide rail 32 and the second slide rail are symmetrically arranged on the inner walls on both sides of the hollow part. The sliding unit 4 can slide along the first slide rail 32 and the second slide rail and slide within the hollow part.

[0046] Preferably, the first slide rail 32 and the second slide rail have the same structure. In order to facilitate the assembly and installation of the slide rail unit 3, the slide rail base 31 has a two-piece structure, including a first half-base and a second half-base. The first slide rail 32 is disposed on the first half-base, and the second slide rail is disposed on the second half-base. The first half-base and the second half-base are combined to clamp the sliding unit 4 in the hollow part.

[0047] Preferably, the sliding unit 4 includes a rolling frame 41, a first roller group 42, and a second roller group 43. The rolling frame 41 is hinged to the support 12. The first roller group 42 and the second roller group 43 are symmetrically arranged on both sides of the rolling frame 41. The first roller group 42 is used to connect with the first slide rail 32 and can slide along the first slide rail 32. The second roller group 43 is used to connect with the second slide rail and can slide along the second slide rail, so that the hatch unit 1 can slide along the first slide rail 32 and the second slide rail.

[0048] Preferred, such as 6 and Figure 7 As shown, the first roller group 42 and the second roller group 43 have the same structure. The first slide rail 32 includes an upper rolling surface and a lower rolling surface. The first roller group 42 includes a first roller 421 and a second roller 422. The first roller 421 and the second roller 422 have the same structure. The first roller 421 is used to connect with the upper rolling surface, and the second roller 422 is used to connect with the lower rolling surface. The first roller 421 and the second roller 422 are used to reduce the friction between the sliding unit 4 and the first slide rail 32 and to prevent the sliding unit 4 from disengaging from the slide rail unit 3.

[0049] Preferably, there are two first rollers 421 and two second rollers 422 to ensure the stability between the sliding unit 4 and the slide rail unit 3.

[0050] Preferably, the first roller 421 is rotatably connected to the roller frame 41 via a pin and a self-aligning bearing 44.

[0051] Compared to Embodiment 1, the rotor shaft nacelle 200 rotates, enabling the canopy unit 1 to slide along the slide rail unit 3. During vertical takeoff and landing, the canopy unit 1 moves towards the power nacelle 100, exposing the recessed portion, allowing the rotor shaft fairing 300 to be inserted into the recessed portion. During level flight, the canopy unit 1 moves towards the rotor shaft nacelle 200, covering the recessed portion, maintaining the streamlined shape of the aircraft nacelle's outer wall and reducing the air resistance of the aircraft nacelle. The canopy skin 11 is a curved skin, and the canopy skin 11 and... The engine compartment 100 is conformal, and the canopy skin 11 can completely cover the recessed area, reducing the air resistance of the engine compartment 100. The end of the support rod 21 is a double-eared joint, and the hinge seat 222 is a three-eared joint. The support rod 21 and the hinge seat 222 are hinged by bolts. The cooperation of the double-eared joint and the three-eared joint can achieve the stability of force transmission, and because the cooperation of the double-eared joint and the three-eared joint prevents relative torsion, it can prevent the canopy unit 1 from deflecting and swaying under aerodynamic forces. When the rotor shaft nacelle 200 rotates away from the engine compartment 100... During operation, the support rod slot 223 prevents the canopy unit 1 from swaying laterally under aerodynamic forces, ensuring the stability and reliability of the canopy unit 1's motion mechanism. When the aircraft is in level flight, the support rod 21 inserts into the support rod slot 223 to achieve the canopy unit 1's closing effect, reducing aerodynamic losses caused by large gaps between moving and fixed components. To facilitate assembly and installation of the slide rail unit 3, the slide rail seat 31 has a two-piece structure, including a first half-seat and a second half-seat. The first slide rail 32 is located on the first half-seat, and the second slide rail... The guide rail is set on the second half of the seat. The first half of the seat and the second half of the seat are combined to clamp the sliding unit 4 in the hollow part. The first roller group 42 includes a first roller 421 and a second roller 422. The first roller 421 and the second roller 422 have the same structure. The first roller 421 is used to connect with the upper rolling surface, and the second roller 422 is used to connect with the lower rolling surface. The first roller 421 and the second roller 422 are used to reduce the friction between the sliding unit 4 and the first guide rail 32 and to prevent the sliding unit 4 from disengaging from the guide rail unit 3.

[0052] Example 2:

[0053] Another specific embodiment of this utility model is as follows: Figure 1 and Figure 2As shown, a nacelle is disclosed, including a power nacelle 100 and a rotor shaft nacelle 200. The power nacelle 100 is mounted on the wing of the aircraft, and the rotor shaft nacelle 200 is rotatably connected to the power nacelle 100. The power nacelle 100 drives the rotor shaft in the rotor shaft nacelle 200, which in turn drives the propeller to rotate, thereby driving the tiltrotor aircraft to fly. The angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 80° and 100°, enabling the tiltrotor aircraft to take off and land vertically; the angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 170° and 190°, enabling the tiltrotor aircraft to fly horizontally.

[0054] The rotor shaft nacelle 200 includes a rotor shaft fairing 300, which is an arc-shaped bulge protruding from the outer wall of the rotor shaft nacelle 200. To prevent interference between the rotor shaft fairing 300 and the power nacelle 100, the power nacelle 100 includes a recess. When the angle between the rotor shaft nacelle 200 and the power nacelle 100 is between 80° and 100°, the rotor shaft fairing 300 can be inserted into the recess, which prevents the rotor shaft fairing 300 from colliding with the power nacelle 100.

[0055] Example 3:

[0056] Another specific embodiment of this utility model discloses a tiltrotor aircraft, including the nacelle of embodiment 2.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A follow-up hatch, characterized in that, The device includes a canopy unit (1), a hinge unit (2), a slide rail unit (3), and a sliding unit (4). The hinge unit (2) and the sliding unit (4) are respectively disposed at both ends of the canopy unit (1). The slide rail unit (3) is disposed on the power compartment (100) of the aircraft. The hinge unit (2) is used to connect the canopy unit (1) to the rotor shaft compartment (200) of the aircraft. The sliding unit (4) is used to make the canopy unit (1) slide along the slide rail unit (3). The canopy unit (1) can slide along the slide rail unit (3) toward or away from the power compartment (100) as the rotor shaft compartment (200) rotates, avoiding interference with the rotor shaft fairing (300) of the aircraft.

2. The follow-up hatch according to claim 1, characterized in that, The hatch unit (1) includes a hatch skin (11), which is a curved skin. The hatch skin (11) is conformal to the power compartment (100) and can completely cover the recess of the power compartment (100).

3. The follow-up hatch according to claim 2, characterized in that, The slide rail unit (3) includes a slide rail seat (31), a first slide rail (32), and a second slide rail. The slide rail seat (31) includes a first half seat and a second half seat. The first slide rail (32) is disposed on the first half seat, and the second slide rail is disposed on the second half seat. The first half seat and the second half seat can be combined to clamp the sliding unit (4) in the hollow part.

4. The follow-up hatch according to claim 3, characterized in that, The hinge unit (2) includes a support rod (21) and a support rod seat (22). The support rod seat (22) is disposed on the rotor shaft nacelle (200). The hinge end of the support rod (21) is hinged to the support rod seat (22). The fixed end of the support rod (21) is fixedly connected to the canopy skin (11). The support rod seat (22) includes a seat body (221) and a support rod groove (223). The seat body (221) is used to connect with the rotor shaft nacelle (200). The support rod groove (223) is disposed on the seat body (221). The rod segment between the hinge end and the fixed end of the support rod (21) can be inserted into the support rod groove (223). The rod segment between the hinge end and the fixed end of the support rod (21) and the support rod groove have a clearance fit with a minimum clearance greater than zero.

5. The follow-up hatch according to claim 4, characterized in that, The support rod seat (22) also includes a hinge seat (222), which is disposed on the seat body (221). One end of the support rod groove (223) is connected to the hinge seat (222), and the support rod (21) is hinged to the hinge seat (222).

6. The follow-up hatch according to claim 5, characterized in that, The hatch unit (1) also includes a support (12), which is fixedly connected to one end of the hatch skin (11), and the sliding unit (4) is hinged to the support (12).

7. The follow-up hatch according to claim 6, characterized in that, The sliding unit (4) includes a rolling frame (41), a first roller group (42), and a second roller group (43). The rolling frame (41) is hinged to the support (12). The first roller group (42) and the second roller group (43) are symmetrically arranged on both sides of the rolling frame (41). The first roller group (42) is used to connect with the first slide rail (32) and can slide along the first slide rail (32). The second roller group (43) is used to connect with the second slide rail and can slide along the second slide rail. The hatch unit (1) can slide along the first slide rail (32) and the second slide rail.

8. The follow-up hatch according to claim 7, characterized in that, The first slide (32) includes an upper rolling surface and a lower rolling surface, and the first roller group (42) includes a first roller (421) and a second roller (422). The first roller (421) is used to connect with the upper rolling surface, and the second roller (422) is used to connect with the lower rolling surface.

9. A nacelle, characterized in that, The aircraft includes a follow-up canopy, a power compartment (100), and a rotor shaft compartment (200) as described in any one of claims 1-8. The power compartment (100) is disposed on the wing of the aircraft. The rotor shaft compartment (200) is rotatably connected to the power compartment (100). The power compartment (100) is used to drive the rotor shaft in the rotor shaft compartment (200). The rotor shaft is used to drive the propeller to rotate, thereby driving the tiltrotor aircraft to fly.

10. A tiltrotor aircraft, characterized in that, Includes the nacelle as described in claim 9.

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