Device for operating a nacelle and method for reducing the shear force at the closed position of the nacelle

Abstract

An apparatus for operating a nacelle to assist the opening and closing of facing nacelles, comprising an external fixed suspension member, a nacelle semi-ring and a connecting rod. The nacelle semi-ring includes a hinge portion, and the connecting rod includes a first end and a second end. The first end is rotatably connected to the external fixed suspension member to form a revolution point, and the second end is rotatably connected to the hinge portion to form a rotation point. This apparatus for operating the nacelle can change the existing nacelle opening and closing method, effectively reducing the residual shear stress on the nacelle sealing strip in the closed state. A method for reducing the shear force at the nacelle closing position is also provided.

Description

Technical Field

[0001] The present invention relates to the field of engine assembly, and particularly to the process nacelle in the test workshop. Background Art

[0002] The process nacelle is one of the necessary test devices for the engine ground test bench, belonging to the engine outer duct device of the engine test bench, and is used as the engine exhaust system in the ground performance test.

[0003] Referring to Figures 1 to 2 As shown, the process nacelle includes a pair of nacelle half-rings 1 and 1', and the nacelle half-rings 1 and 1' are generally connected to the external fixed hanging parts 2 on the test bench through components such as a rotating shaft 3 and rotate around the rotating shaft 3. Each of the nacelle half-rings 1 and 1' includes an outer wall surface, an inner wall surface, a sealing structure, etc. The inner wall surface cooperates with the engine casing 5, and the sealing structure is used to seal the nacelle and the engine, and is often arranged on the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' of the nacelle half-rings 1 and 1', and is mainly realized in the form of buckles or V-grooves, etc. In order to maintain a certain sealing performance, sealing strips are often arranged at the edges of the V-groove sides, that is, the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4'. By squeezing the sealing strips, the leakage of the engine outer duct air flow to the outside of the engine and the core engine compartment can be effectively prevented.

[0004] Taking Figure 1 the nacelle half-rings 1 and 1' shown as the description object, the common nacelle buckling process can be simplified as the process in which the nacelle half-rings 1 and 1' rotate as a whole around the connection point of the rotating shaft 3. As the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' gradually approach, the buckling of the connection components such as buckles located thereon is realized manually to close the nacelle. In this buckling process, the upper edges of the upper contact surfaces 6, 6' are first subjected to the buckling force and are closely attached. As the nacelle half-rings 1 and 1' gradually rotate towards the axis, the lower edges of the upper contact surfaces 6, 6' also come into contact completely, and the upper edges of the lower contact surfaces 4, 4' are gradually closely attached until the lower edges of the lower contact surfaces 4, 4' are attached, and the nacelle half-rings 1 and 1' complete the closing process.

[0005] In this process, the upper edges of the upper contact surfaces 6, 6' are buckled first and are subjected to a large extrusion force. As the nacelles 1 and 1' are gradually closed and the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' are gradually attached, the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' cannot achieve uniform contact, resulting in shear forces in the circumferential direction of the nacelle on the sealing strips of the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' due to uneven force, and the influence area of the shear force is relatively large. There will also be residual shear stress on the sealing strips in the open state. At the same time, when the nacelle is in the opening process, there is also a process of gradual opening between the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4', so the sealing strips are always unevenly stressed.

[0006] During the engine test process, it is necessary to frequently open and close the nacelle half-ring. However, the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' cannot be evenly fitted, resulting in shear force and stress always existing on the sealing strip. The long-term shear force and stress will make the sealing strip prone to failure phenomena such as damage and shedding. While frequent replacement is required, it will also have an adverse impact on the engine performance and test verification, reducing the engine test efficiency. Summary of the Invention

[0007] An object of the present invention is to provide a device for operating a nacelle, which can make the contact surfaces evenly contact when the nacelle is closed or opened, effectively reducing the residual shear stress on the sealing strip.

[0008] The device for operating the nacelle for achieving the above object is used to assist in the opening and closing of the opposite-facing nacelles, and includes an external fixed hanging member, a nacelle half-ring and a connecting rod. The nacelle half-ring includes a hinge portion. The connecting rod includes a first end and a second end. The first end is rotatably connected to the external fixed hanging member to form a revolution point, and the second end is rotatably connected to the hinge portion to form a rotation point.

[0009] In one or more embodiments, the hinge portion includes a fixed connecting member. One end of the fixed connecting member is rotatably connected to the connecting rod, and the other end is fixedly connected to the upper edge of the nacelle half-ring.

[0010] In one or more embodiments, the device for operating the nacelle further includes a third connecting rod and a fourth connecting rod. One end of the third connecting rod is hinged to one end of the fourth connecting rod, and the other end is rotatably connected to the external fixed hanging member to form a third rotation portion. The other end of the fourth connecting rod is rotatably connected to the fixed connecting member to form a fourth rotation portion.

[0011] In one or more embodiments, the nacelle auxiliary connecting device further includes an elastic member. Both ends of the elastic member are rotatably connected to the external fixed hanging member and the fixed connecting member respectively to form a third rotation portion and a fourth rotation portion.

[0012] In one or more embodiments, the device for operating the nacelle further includes a telescopic rod. Both ends of the telescopic rod are rotatably connected to the external fixed hanging member and the fixed connecting member respectively to form a third rotation portion and a fourth rotation portion.

[0013] In one or more embodiments, a plurality of the hinge portions and a plurality of the connecting rods are axially distributed along the nacelle half-ring.

[0014] In one or more embodiments, the device for operating the nacelle further includes a hanging member for lifting the nacelle.

[0015] In one or more embodiments, the hanging member is an electric hoist.

[0016] Another object of the present invention is to provide a method for reducing the shear force at the closed position of the nacelle, improving the movement mode of the existing process nacelle when opening or closing. During the closing process, first rotate the two nacelle half-rings separately so that the contact surfaces of the nacelle half-rings are in a state perpendicular to the axial direction of the nacelle, and then translate the two nacelles relative to each other to the docking attitude; during the opening process, first translate the nacelle half-rings to separate them, and then rotate the nacelle half-rings to complete the opening.

[0017] The device for operating the nacelle is respectively connected to an external fixed suspension member and a hinge part through a connecting rod, forming a revolution point and a rotation point of the nacelle half-ring. The nacelle half-ring rotates around the revolution point and also rotates around the rotation point, which can expand the rotation angle and rotation amplitude of the nacelle half-ring, enabling the nacelle half-ring to be adjusted to a suitable docking position in a timely manner. When the nacelle half-ring is in a state perpendicular to the axial direction of the nacelle half-ring, move the nacelle half-ring to obtain a translation effect. At this time, the contact surfaces can be closed flatly, effectively reducing the residual shear stress on the sealing strip in the closed state and improving the test efficiency in the test workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, properties and advantages of the present invention will become more obvious through the following description in conjunction with the drawings and embodiments, where:

[0019] Figure 1 is a schematic diagram of the state when the nacelle is closed;

[0020] Figure 2 is a schematic diagram of the state when the nacelle is opened;

[0021] Figure 3 is a schematic diagram of the first embodiment of the device for operating the nacelle in a suspended state;

[0022] Figure 4 is a schematic diagram of the second embodiment of the device for operating the nacelle in a suspended state;

[0023] Figure 5 is a schematic diagram of the third embodiment of the device for operating the nacelle in a suspended state;

[0024] Figure 6 is a schematic diagram of the third embodiment of the device for operating the nacelle in another suspended state;

[0025] Figure 7 is a schematic diagram of the fourth embodiment of the device for operating the nacelle in a suspended state.

[0026] DESCRIPTION OF SYMBOLIC MARKINGS

[0027] 1, 1' nacelle half-ring

[0028] 2 External fixed suspension

[0029] 3 Rotating shaft

[0030] 4, 4' Lower contact surface

[0031] 5 Engine casing

[0032] 6, 6' Upper contact surface

[0033] 12 Hinge part

[0034] 13 Fixed connecting piece

[0035] 30 Suspension piece

[0036] 31 Bracket

[0037] 32 Electric hoist

[0038] 40 Connecting rod

[0039] 50 Revolution point

[0040] 60 Rotation point

[0041] 43 Third connecting rod

[0042] 44 Fourth connecting rod

[0043] 45 Second rotating part

[0044] 46 Elastic part

[0045] 70 Third rotating part

[0046] 80 Fourth rotating part Specific embodiments

[0047] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is clearly capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment. It should be noted that these and subsequent other drawings are only examples, and they are not drawn under the condition of equal proportion, and should not be used to limit the actual required protection scope of the present invention. As described in the following embodiments, only the nacelle half-ring 1 is used to illustrate the principle of the device. It can be understood that the nacelle half-ring 1' is also applicable to the following embodiments, and will not be elaborated here.

[0048] As Figure 3As shown, the device for operating the nacelle includes a nacelle half ring 1, an external fixed hanger 2 and a connecting rod 40. The external fixed hanger 2 includes a hinge 12, and the connecting rod 40 includes a first end and a second end, the first end is rotatably connected to the external fixed hanger 2 to form a revolution point 50; the second end is rotatably connected to the hinge 12 to form a rotation point 60. The nacelle half ring 1 rotates around the revolution point 50 and also around the rotation point 60, which can expand the rotation angle and rotation range of the nacelle half ring 1, so that the two nacelle half rings 1 can be adjusted to a suitable docking position.

[0049] It should be noted that when the nacelle half ring 1 rotates to the six o'clock direction, that is, when the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' are perpendicular to the axial direction of the nacelle body, the nacelle half rings 1 and 1' can be docked by pulling the nacelle half ring 1 for about a few millimeters. At this time, the movement of the nacelle half rings 1 and 1' has a translation effect. The nacelle half rings 1 and 1' are closed to each other through approximate translation movement, which can ensure the stable contact of the contact surface and make the sealing strip evenly stressed.

[0050] To achieve the above-mentioned motion effect, in one embodiment, the hinged portion 12 is a plurality of lifting ears protruding from the upper edge of the nacelle half ring 1, and the second end of the connecting rod 40 is a circular ring matched with the lifting ears. Then, when the connecting rod 40 pulls the nacelle half ring 1, the nacelle half ring 1 can be rotated around the matching point between the lifting ears and the circular ring, that is, the rotation point 60. When the nacelle half rings 1 and 1' rotate to the six o'clock direction, the nacelle half rings 1 and 1' are pulled to a horizontal docking state, and the nacelle can be buckled.

[0051] In another embodiment, the hinged portion 12 is a pin disposed on the upper edge of the nacelle half ring 1, the pin extending in the axial direction, and the second end of the connecting rod 40 is configured as a ring matched with the pin, so that the nacelle half ring 1 can be rotated around the pin while the connecting rod 40 pulls the nacelle half ring 1. Further, the pin is preferably a component with a threaded structure at the end, and when the nacelle half ring 1 is fixed to a suitable position, the pin is tightened with a nut, so that the nacelle half ring 1 can be fixed in a suitable docking position to ensure the accuracy of the nacelle half rings when docking.

[0052] Furthermore, the pin is arranged in a pin hole with a certain length provided in the hinge portion 12. When the nacelle half ring 1 is in a rotating state, the pin is locked in the pin hole, and after the nacelle half ring 1 falls to a suitable docking position, the pin is released so that it can move horizontally in the pin hole with a certain length, at which time the translational movement of the nacelle half ring 1 can be realized, and finally the two nacelle half rings 1 and 1' are smoothly buckled.

[0053] The connection method between the hinge part 12 and the connecting rod 40 includes but is not limited to the above-mentioned embodiment. In other embodiments, as long as the connection method can realize the rotation of the nacelle half ring around the rotation point, it can be applied to the present disclosure without exceeding the scope of the present disclosure.

[0054] Preferably, in Figure 3 the illustrated embodiment, the suspension member 30 provides a force support for the nacelle half-ring 1 during rotation. The suspension member 30 is used to lift and lower the nacelle half-ring 1 to make it descend or ascend smoothly. When the nacelle half-ring 1 descends, the suspension member 30 provides a pulling force to prevent the nacelle half-ring 1 from falling off; when the nacelle half-ring 1 ascends, the suspension member 30 provides a traction force to provide a driving force for the ascent of the nacelle half-ring 1.

[0055] In one embodiment, the suspension member 30 includes a bracket 31 located above the nacelle half-ring 1 and a hoist 32 provided on the bracket 31. The bracket 31 is located on the test stand. The hoist 32 maintains the traction on the nacelle half-ring 1 to provide a stable pulling force for the movement of the nacelle half-ring 1. On the basis of the above embodiment, the hoist 32 is arranged to be slidable on the bracket 31 so as to adapt to the nacelle half-ring 1 at different rotational positions and provide an effective traction force for it.

[0056] The suspension member 30 includes but is not limited to the above embodiments. In other embodiments, an external independent bracket and a hoisting device may also be used to realize the support of the nacelle half-ring 1, or a floor support device may be used to adjust the length of the floor support device to adapt to the rotational position of the nacelle half-ring 1 and provide a support force or a driving force for the rotation of the nacelle half-ring 1. Those skilled in the art should understand that any mechanism applicable to the test workshop and capable of providing support or traction for the nacelle casing can be applied to the present disclosure without exceeding the scope of the present disclosure.

[0057] During the closed assembly process of the nacelle, when the axial position of the nacelle half-ring 1 is determined, the docking position adjustment and fastening work are started. In this process, no additional power is added, and only the gravity of the nacelle half-ring 1 itself is utilized, and the nacelle half-ring 1 is slowly lowered under the traction of the suspension member 30.

[0058] The nacelle half-ring 1 starts to fall by virtue of its own gravity and gradually drives the connecting rod 40 connected to the hinge portion 12. Subsequently, the connecting rod 40 rotates along the revolution point 50. At this time, while the nacelle half-ring 1 rotates around the rotation point 60, it will also rotate around the revolution point 50 itself. This rotation mode can effectively expand the rotation angle and rotation amplitude of the nacelle half-ring 1. In this process, the staff can also manually adjust the rotation position of the nacelle half-ring 1 to make it in the best docking state.

[0059] When the nacelle half-ring 1 drops to the six o'clock position, that is, when the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' are all perpendicular to the nacelle axial direction, pull the nacelle half-ring 1 to make it close to and fit smoothly with another nacelle half-ring 1'. During this process, the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' can be regarded as approaching synchronously in a horizontal manner. The sealing strips at the edges of the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' will be subjected to uniform radial pressure at the connection between the nacelle half-ring fixing structure and the engine fan casing or the intermediate casing, and no additional shear force will be generated. Subsequently, manually connect the buckle devices on the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' to complete the smooth closing of the two nacelle half-rings 1 and 1'.

[0060] During the opening process of the nacelle, first manually release the buckle devices of the two nacelle half-rings 1 and 1', push the nacelle half-ring 1 horizontally outwards to separate the two nacelle half-rings 1 and 1', and then use the suspension member 30 to apply a pulling force to the nacelle half-ring 1, lift it and rotate it to both sides respectively until the opening of the nacelle is completed.

[0061] Preferably, a plurality of hinge portions 12 and a plurality of connecting rods 40 are provided along the axis direction of the nacelle half-ring 1, and the plurality of hinge portions 12 and the plurality of connecting rods 40 cooperate with each other to connect the nacelle half-ring 1 with the external fixed suspension member 2. Through the cooperation of the plurality of connecting rods 40 and the plurality of hinge portions 12, the connection strength of the nacelle half-ring 1 can be enhanced.

[0062] Furthermore, the connection points of the plurality of connecting rods 40 with the external fixed suspension member 2 are arranged on a plurality of sliders located on the external fixed suspension member 2. According to the specification requirements of different nacelle half-rings, the plurality of sliders move relative to each other, thereby changing the mutual distance between the connecting rods 40 to adapt to different specifications of the nacelle half-ring 1, making the device have a certain universality.

[0063] The operation of the nacelle device includes but is not limited to the above embodiments. In order to effectively adjust the nacelle half-ring 1, in Figure 4 In the second embodiment shown, the hinge portion 12 includes a fixed connecting member 13. One end of the fixed connecting member 13 is rotatably connected to the connecting rod 40, and the other end is fixedly connected to the upper edge of the nacelle half-ring 1. For example, components such as a half-ring locking device are used to fix the nacelle half-ring 1 to the fixed connecting member 13. The nacelle half-ring 1 and the fixed connecting member 13 rotate as a whole around the self-rotation point 60, and at the same time the connecting rod 40 rotates around the revolution point 50, driving the nacelle half-ring 1 and the fixed connecting member 13 as a whole to rotate around the revolution point 50 at the same time. The nacelle half-ring 1 can approach each other with a small angle and a large curvature radius of the movement trajectory, and it is convenient for the staff to adjust the attitude of the nacelle half-ring 1, so that the upper contact surfaces 6, 6' and the lower contact surfaces 4, 4' are in the best docking state, thereby basically eliminating the shear force and residual stress of the sealing strip during the closing process of the nacelle.

[0064] Based on the above embodiments, the device further includes a third link 43 and a fourth link 44. As Figure 5 and Figure 6 shown, one end of the third link 43 is hinged to one end of the fourth link 44 to form a second rotating part 45, the other end of the third link 43 is rotatably connected to the external fixed suspension member 2 to form a third rotating part 70, and the other end of the fourth link 44 is rotatably connected to the fixed connecting member 13 to form a fourth rotating part 80. The third link 43, the fourth link 44, the fixed connecting member 13, the external fixed suspension member 2 and the link 40 form a five-link structure, making the movement process of the nacelle half-ring 1 smoother, effectively realizing the horizontal buckling process between the nacelle half-rings 1 and 1', and ensuring the safety of the mechanical structure between the engine casing 5 and the nacelle half-ring 1.

[0065] The following will describe the usage process of the third embodiment of the device for operating the nacelle in conjunction with Figure 5 and Figure 6 . When the nacelle needs to be closed, the nacelle half-ring 1 begins to fall by virtue of its own gravity, gradually driving the link 40 connected to the fixed connecting member 13 and the fourth link 44 hinged to the third link 43. Subsequently, the fixed connecting member 13 rotates simultaneously around the self-rotation point 60 and the fourth rotating part 80, the link 40 rotates along the revolution point 50, and the third link 43 rotates around the third rotating part 70, forming a moving five-link mechanism. At this time, the staff can adjust the docking attitude of the nacelle half-ring 1 within a larger range until the nacelle half-ring 1 falls to the six o'clock direction perpendicular to the axis of the half nacelle, and then horizontally pulls the nacelle half-ring 1 to achieve a smooth buckling between the nacelle half-rings 1 and 1'. During the falling process of the nacelle half-ring 1, the five-link mechanism provides a smooth pulling force for the nacelle half-ring 1.

[0066] When the nacelle needs to be opened, push the nacelle half-ring 1 horizontally to separate the nacelle half-rings 1 and 1' in the horizontal direction, and then use the electric hoist 32 to pull the nacelle half-ring 1 to make it gradually rise. During the rising process of the nacelle half-ring 1, the fixed connecting member 13 rotates simultaneously around the self-rotation point 60 and the fourth rotating part 80, the link 40 rotates around the revolution point 50, and the third link 43 rotates around the third rotating part 70 until the nacelle half-ring 1 moves to a suitable position.

[0067] To ensure the movement stability of the nacelle half-ring 1, in Figure 7In the fourth embodiment of the device of the operation nacelle shown, an elastic member 46 is further included between the fixed connecting member 13 and the external fixed hanging member 2. The two ends of the elastic member 46 are rotatably connected to the external fixed hanging member 2 and the fixed connecting member 13 respectively, forming a third rotating portion 70 and a fourth rotating portion 80. The fixed connecting member 13 rotates around the fourth rotating portion 80, and the elastic member 46 also rotates along the third rotating portion 70. During the closing or opening process of the nacelle half-ring 1, the elastic member 46 provides a pulling force of appropriate magnitude for the fixed connecting member 13 to ensure the smooth movement of the nacelle half-ring 1.

[0068] In order to ensure the movement stability of the nacelle half-ring 1, in another embodiment, the elastic member 46 is replaced with a telescopic rod, such as using components such as a telescopic lead screw and a hydraulic rod. The two ends of the telescopic rod are rotatably connected to the external fixed hanging member 2 and the fixed connecting member 13 respectively, forming a third rotating portion 70 and a fourth rotating portion 80. While the telescopic rod rotates around the third rotating portion 70, the fixed connecting member 13 rotates around the fourth rotating portion 80 to provide support for the closing or opening of the nacelle half-ring 1.

[0069] The auxiliary connection device between the external fixed hanging member 2 and the fixed connecting member 13 includes but is not limited to the above embodiments. In other embodiments, those skilled in the art should recognize that any structure capable of realizing the rotational movement between the external fixed hanging member 2 and the fixed connecting member 13 can be applied to the present disclosure.

[0070] Combined with the above introduction of the device of the operation nacelle, a method for reducing the shear force at the closing position of the nacelle can also be understood. During the closing process, first rotate the two nacelle half-rings 1 and 1' respectively, so that the contact surfaces of the respective nacelle half-rings 1 and 1', that is, the upper contact surfaces 6 and 6' and the lower contact surfaces 4 and 4' are in a state perpendicular to the axis direction of the nacelle half-ring, and then relatively translate the nacelle half-rings 1 and 1' to the docking posture to complete the closing of the nacelle.

[0071] During the opening process, first translate the nacelle half-rings 1 and 1' to separate them, and then rotate the nacelle half-rings 1 and 1' to complete the opening of the nacelle.

[0072] Different from the existing movement mode of the nacelle that only opens or closes around the rotation axis, this method improves the single-rotation mode to a mode of closing by first rotating and then translating, and opening by first translating and then rotating, effectively reducing the area range where shear force may be generated on the sealing strip at the connection between the process nacelle and the engine fan casing and the intermediate casing during the closing process of the process nacelle. At the same time, it also greatly reduces the residual shear stress on the sealing strip in the closed state. The sealing structure bears pressure evenly, which can enhance the sealing effect, extend the service life of the sealing member structure, and also improve the test efficiency in the test workshop.

[0073] Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, all modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention fall within the protection scope defined by the claims of the present invention.

Claims

1. An apparatus for operating a nacelle, which is used to assist in the opening and closing of the nacelle, characterized in that Comprising: An external fixed suspension member (2); Nacelle half rings (1, 1'), including a hinged portion (12); A connecting rod (40), including a first end and a second end, the first end being rotatably connected to the external fixed suspension member (2) to form a revolution point (50), the second end being rotatably connected to the hinged portion (12) to form a rotation point (60), the connecting rod being arranged to allow the nacelle half rings (1, 1') to have a translational movement; The hinged portion (12) includes a fixed connecting member (13), one end of the fixed connecting member (13) being rotatably connected to the connecting rod (40), and the other end being fixedly connected to the upper edge of the nacelle half rings (1, 1').

2. The device for operating the nacelle according to claim 1, characterized in that, The device for operating the nacelle further includes a third connecting rod (43) and a fourth connecting rod (44), One end of the third connecting rod (43) is hinged to one end of the fourth connecting rod (44), and the other end is rotatably connected to the external fixed suspension member (2) to form a third rotating portion (70), The other end of the fourth connecting rod (44) is rotatably connected to the fixed connecting member (13) to form a fourth rotating portion (80).

3. The device for operating the nacelle according to claim 1, characterized in that, The device for operating the nacelle further includes an elastic member (46), Both ends of the elastic member (46) are respectively rotatably connected to the external fixed suspension member (2) and the fixed connecting member (13) to form a third rotating portion (70) and a fourth rotating portion (80).

4. The device for operating the nacelle according to claim 1, characterized in that, The device for operating the nacelle further includes a telescopic rod, Both ends of the telescopic rod are respectively rotatably connected to the external fixed suspension member (2) and the fixed connecting member (13) to form a third rotating portion (70) and a fourth rotating portion (80).

5. The device for operating the nacelle according to claim 1, characterized in that, A plurality of the hinged portions (12) and a plurality of the connecting rods (40) are axially distributed along the nacelle half rings (1, 1').

6. The device for operating the nacelle according to claim 1, characterized in that, The device for operating the nacelle further includes a suspension member (30) for lifting the nacelle half rings (1, 1').

7. The device for operating the nacelle according to claim 6, characterized in that, The suspension member (30) includes an electric hoist (32).

8. A method for reducing the shear force at the nacelle closing position, characterized in that, Using the device according to any one of claims 1 - 7, the method includes the following steps: During the closing process, first rotate the two nacelle half rings (1, 1') respectively so that the contact surfaces of the nacelle half rings (1, 1') are in a state perpendicular to the axis of the nacelle half rings, and then relatively translate the two nacelle half rings (1, 1') to the docking posture; During the opening process, first translate each of the nacelle half rings (1, 1') to separate them, and then rotate each of the nacelle half rings (1, 1') to complete the opening.

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