Design method of flaperon sealing mechanism

Abstract

The invention belongs to the technical field of aircraft structure design, and particularly relates to a flaperon sealing mechanism design method which comprises the steps that the position of a rotating shaft of a sealing plate and the installation position of a roller at the neutral position of a control plane are determined; according to the deflection motion relation of the control surface and the sealing plate, segmentally determining a guide rail arc track; smoothly connecting each section of arc track obtained by segmentation, and determining a final track of the guide rail; and designing iteration. According to the design method, the movement track of the curve sliding rail is determined through a segmented design method according to the deflection movement relation of the control surface and the sealing plate, constraint conditions such as the structure installation space and the gap value between the sealing plate and the control surface are comprehensively considered in the design process, the design steps are clear and concise, and the design period is greatly shortened.

Description

Technical Field

[0001] This application belongs to the field of aircraft structural design technology, and specifically relates to a design method for a flap and aileron sealing mechanism. Background Technology

[0002] Aircraft flaps and ailerons typically employ fixed-axis deflection motion. When the flaps and ailerons deflect, a gap forms between the flap and aileron control surfaces and the upper surface of the fixed trailing edge of the wing. This naturally formed gap affects the airflow at the wing's trailing edge, thus impacting the aerodynamic performance of the flaps and ailerons. To address this gap, a flap and aileron sealing mechanism can be installed between the flap and aileron control surfaces and the fixed trailing edge of the wing to seal the gap after deflection. Commonly used flap and aileron sealing mechanisms include linkage-type and curved guide rail-type mechanisms. For curved guide rail-type sealing mechanisms, the trajectory of the curved guide rail directly affects the clearance between the sealing plate and the flap and aileron control surfaces. Therefore, the rapid, efficient, and rational design of the curved guide rail trajectory is crucial for this type of flap and aileron sealing mechanism. Summary of the Invention

[0003] To address the aforementioned problems, a design method for a flaperon sealing mechanism is provided, comprising:

[0004] The first step is to determine the position of the sealing plate pivot O1 based on the position of the fixed trailing edge of the wing and the design space of the sealing plate pivot.

[0005] The second step is to determine the roller installation position A1 when the rudder is in the neutral position based on the installation space of the rudder end rib and the range of the rudder surface deflection angle. This point is used as the first point on the first arc trajectory of the guide rail.

[0006] The third step is to determine the second point C1 on the first arc trajectory of the guide rail in order to achieve the upward deflection of the sealing plate around the axis O1 by α1 when the rudder surface deflects upward around the axis O2.

[0007] The fourth step is to determine the third point C2 on the first arc trajectory of the guide rail when the rudder deflects upward by β2 and the sealing plate deflects upward by α2.

[0008] Fifth step: Determine the first arc trajectory of the guide rail using points A1, C1, and C1.

[0009] Step 6: Determine the first point C3 on the second arc trajectory of the guide rail when the rudder deflects downward β3 and the sealing plate deflects downward α3.

[0010] Step 7: To ensure the sealing plate remains stationary when the rudder deflects downwards by β4, determine the second arc trajectory of the guide rail;

[0011] Step 8: Determine the trajectory of the third arc segment of the guide rail when the rudder deflects downwards by β5 and β6, and the sealing plate deflects downwards by α5 and α6.

[0012] Step 9: Smoothly connect the three circular arc trajectories mentioned above to determine the final trajectory of the guide rail;

[0013] Step 10: Determine the gap between the sealing plate and the rudder surface based on the final trajectory of the guide rail. If the gap value does not meet the design requirements or the structural installation space is insufficient, adjust parameters such as the position of the sealing plate shaft O1, and iterate the design according to steps 1 to 9.

[0014] Preferably, in the third step, the specific process of determining point C1 includes: drawing an arc of angle α1 along the upward deflection direction of the sealing plate with O1 as the center and O1A1 as the radius to obtain the roller position B1; drawing an arc of angle β1 along the upward deflection direction of the roller with O2 as the center and O2B1 as the radius to obtain point C1.

[0015] Preferably, in the fourth step, the process of determining point C2 is similar to that in the third step, and is derived through the geometric relationship between the rudder surface deflection β2 and the sealing plate deflection α2.

[0016] Preferably, in the fifth step, the first arc trajectory of the guide rail is fitted by three points A1, C2, and C1 to ensure a smooth trajectory.

[0017] Preferably, in the sixth step, the process of determining point C3 includes the coordinated movement of the rudder deflecting downward β3 and the sealing plate deflecting downward α3.

[0018] Preferably, in the seventh step, the second arc trajectory of the guide rail is determined by drawing an arc with an angle β4 along the direction of the roller movement when the rudder surface deflects downward, with O2 as the center and O2C3 as the radius, to achieve the effect of the sealing plate being stationary.

[0019] Preferably, in the eighth step, the third arc trajectory of the guide rail is determined by points C4, C5, and C6 using a method similar to steps three to five, and is used for trajectory design when the rudder surface continues to deflect.

[0020] Preferably, in the ninth step, the final trajectory of the guide rail is formed by smoothly connecting three circular arcs to ensure the continuity of motion.

[0021] Preferably, the gap between the sealing plate and the control surface is also obtained through simulation.

[0022] This application provides a design method for a flaperon sealing mechanism, which designs the curved guide rail trajectory in segments. The design process comprehensively considers constraints such as structural installation space and the gap value between the sealing plate and the control surface. The design steps are clear and concise, and the design cycle is greatly shortened. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the initial state of the flap aileron sealing mechanism in this invention.

[0024] Figure 2 This invention determines the second point on the first segment of the circular arc trajectory of the guide rail. A schematic diagram of the process.

[0025] Figure 3 This invention determines the third point on the first segment of the circular arc trajectory of the guide rail. A schematic diagram of the process.

[0026] Figure 4 In this invention, , , A schematic diagram illustrating the process of determining the first segment of the circular trajectory of the guide rail using three points.

[0027] Figure 5 This invention determines the first point on the second segment of the circular arc trajectory of the guide rail. A schematic diagram of the process.

[0028] Figure 6 This is a schematic diagram illustrating the process of determining the second arc trajectory of the guide rail in this invention.

[0029] Figure 7 This is a schematic diagram of the guide rail trajectory finally determined according to the method described in this invention.

[0030] Figure 8 This is a schematic diagram of the motion process of an embodiment of the flaperon sealing mechanism designed according to the method described in this invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the flaperon control surface 1 is located behind the fixed trailing edge 2 of the wing, and rotates around the axis of rotation. It performs fixed-axis motion. The flaperon control surface 1 can rotate around the axis of rotation. It can deflect upwards or downwards. The sealing plate panel 3 is located behind the fixed trailing edge 2 of the wing and above the flaperon control surface 1, and is fixedly connected to the sealing plate support arm 4, rotating around its front end axis. It rotates around a fixed axis. The sealing plate slide rail 5 is fixedly installed on the end rib of the flaperon control surface 1. When the flaperon control surface 1 deflects upward or downward, the roller 6 installed on the sealing plate support arm 4 moves in the guide groove, thereby driving the sealing plate to rotate around the sealing plate axis. The valve deflects automatically, maintaining a tight seal between the aileron control surface 1 and the fixed trailing edge 2 of the wing.

[0033] The specific design method and steps are as follows:

[0034] Step 1: Determine the hinge of the sealing plate Location

[0035] Based on the fixed trailing edge position of the wing and the design space of the sealing plate pivot, determine the sealing plate pivot. Location;

[0036] Step 2: Determine the roller installation position when the rudder surface is in the neutral position.

[0037] The roller installation position when the rudder is in the neutral position is determined based on the installation space of the rudder end ribs and the range of the rudder surface deflection angle. This point serves as the first point on the first segment of the circular trajectory of the guide rail;

[0038] Step 3: Determine the second point on the first segment of the circular arc trajectory of the guide rail.

[0039] To achieve the control surface around the axis of rotation deflect upward At that time, the sealing plate rotates around the axis deflect upward :like Figure 2 As shown, with With the center of the circle, Let be the radius, and draw an angle along the upward deflection direction of the sealing plate. The position of the roller is obtained by drawing an arc. ,by With the center of the circle, Let be the radius, and draw an angle along the direction of the roller's motion when the rudder surface deflects upwards. The second point on the first arc trajectory of the guide rail is obtained from the arc. ;

[0040] Step 4: Determine the third point on the first segment of the circular arc trajectory of the guide rail.

[0041] like Figure 3 As shown, step three determines when the rudder surface rotates around the axis of rotation. deflect upward The sealing plate rotates around the axis deflect upward At that time, the third point on the first segment of the circular trajectory of the guide rail ;

[0042] Step 5: Determine the trajectory of the first arc segment of the guide rail

[0043] like Figure 4 As shown, with , , Three points determine the first segment of the circular arc trajectory of the guide rail;

[0044] Step 6: Determine the first point on the second arc trajectory of the guide rail. ;

[0045] like Figure 5 As shown, step three determines when the rudder surface rotates around the axis of rotation. Deflect downwards The sealing plate rotates around the axis Deflect downwards At that time, the first point on the second segment of the circular arc trajectory of the guide rail ;

[0046] Step 7: Determine the trajectory of the second arc segment of the guide rail

[0047] like Figure 6 As shown, to achieve the control surface rotating around the axis of rotation Deflect downwards At this time, the sealing plate remains in its current position and does not rotate: With the center of the circle, Let be the radius, and draw an angle along the direction of the roller's motion when it deflects downwards along the rudder surface. The arc is used to determine the trajectory of the second arc segment of the guide rail;

[0048] Step 8: Determine the trajectory of the third arc segment of the guide rail

[0049] Follow steps three through five to determine when the rudder surface rotates around the axis. Continue to deflect downwards , The sealing plate rotates around the axis Deflect downwards , At that time, the second point on the third segment of the circular arc trajectory of the guide rail Third point ,by , , Determine the trajectory of the third arc segment of the guide rail;

[0050] Step 9: Determine the final trajectory of the guide rail

[0051] like Figure 7 As shown, the three circular arc trajectories obtained in the above steps are smoothly connected to determine the final trajectory of the guide rail;

[0052] Step 10: Design Iteration

[0053] Simulations were performed on the control surface and sealing mechanism to monitor the gap between the sealing plate and the control surface. When the gap value did not meet the design requirements or the structural installation space was insufficient, parameters such as the position of the sealing plate's rotating shaft O1 were adjusted. After iterating through steps one through nine, the optimal solution was obtained. A schematic diagram of the motion process of the flap-aileron sealing mechanism designed according to the described method is shown below. Figure 8 As shown. The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A design method for a flaperon sealing mechanism, characterized in that, include: The first step is to determine the position of the sealing plate pivot O1 based on the position of the fixed trailing edge of the wing and the design space of the sealing plate pivot. The second step is to determine the roller installation position A1 when the rudder is in the neutral position based on the installation space of the rudder end rib and the range of the rudder surface deflection angle. This point is used as the first point on the first arc trajectory of the guide rail. The third step is to determine the second point C1 on the first arc trajectory of the guide rail in order to achieve the upward deflection of the sealing plate around the axis O1 by α1 when the rudder surface deflects upward around the axis O2. The fourth step is to determine the third point C2 on the first arc trajectory of the guide rail when the rudder deflects upward by β2 and the sealing plate deflects upward by α2. Fifth step: Determine the first arc trajectory of the guide rail using points A1, C1, and C1. Step 6: Determine the first point C3 on the second arc trajectory of the guide rail when the rudder deflects downward β3 and the sealing plate deflects downward α3. Step 7: To ensure the sealing plate remains stationary when the rudder deflects downwards by β4, determine the second arc trajectory of the guide rail; Step 8: Determine the trajectory of the third arc segment of the guide rail when the rudder deflects downwards by β5 and β6, and the sealing plate deflects downwards by α5 and α6. Step 9: Smoothly connect the three circular arc trajectories mentioned above to determine the final trajectory of the guide rail; Step 10: Determine the gap between the sealing plate and the rudder surface based on the final trajectory of the guide rail. If the gap value does not meet the design requirements or the structural installation space is insufficient, adjust parameters such as the position of the sealing plate shaft O1, and iterate the design according to steps 1 to 9.

2. The design method of the flap sealing mechanism as described in claim 1, characterized in that, The specific process of determining point C1 in the third step includes: drawing an arc of angle α1 along the direction of upward deflection of the sealing plate with O1 as the center and O1A1 as the radius to obtain the position B1 of the roller; drawing an arc of angle β1 along the direction of roller movement when the rudder surface deflects upward with O2 as the center and O2B1 as the radius to obtain point C1.

3. The design method of the flap sealing mechanism as described in claim 1, characterized in that, In the fourth step, the process of determining point C2 is similar to that in the third step, and is derived from the geometric relationship between the rudder surface deflection β2 and the sealing plate deflection α2.

4. The design method of the flap sealing mechanism as described in claim 1, characterized in that, In the fifth step, the first arc trajectory of the guide rail is fitted by three points A1, C2, and C1 to ensure a smooth trajectory.

5. The design method of the flap sealing mechanism as described in claim 1, characterized in that, In the sixth step, the process of determining point C3 includes the coordinated movement of the rudder deflecting downward β3 and the sealing plate deflecting downward α3.

6. The design method of the flap abutment sealing mechanism as described in claim 1, characterized in that, In the seventh step, the second arc trajectory of the guide rail is determined by drawing an arc with an angle β4 along the direction of the roller movement when the rudder surface deflects downward, with O2 as the center and O2C3 as the radius, to achieve the effect of the sealing plate being stationary.

7. The design method of the flap sealing mechanism as described in claim 1, characterized in that, In the eighth step, the third arc trajectory of the guide rail is determined by points C4, C5, and C6 using a method similar to steps three to five, and is used for trajectory design when the rudder surface continues to deflect.

8. The design method of the flap sealing mechanism as described in claim 1, characterized in that, In the ninth step, the final trajectory of the guide rail is formed by smoothly connecting three circular arcs to ensure the continuity of motion.

9. The design method of the flap sealing mechanism as described in claim 1, characterized in that, The gap between the sealing plate and the control surface was also obtained through simulation.

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