Polar research vessel aircraft hangar door closing device and control method

Abstract

The application relates to the technical field of hangar sealing, in particular to a polar exploration ship airplane hangar door closing device and a control method, a hangar sliding door and a hangar wall are provided with a closing device, the closing device keeps a sealing strip and a pressing plate in close contact and sealing when the hangar sliding door is closed; the closing device comprises a first oil cylinder and a second oil cylinder connected with the hangar wall; a lock hook assembly is arranged on a piston rod of the first oil cylinder; a buckle plate and a baffle plate are arranged on the hangar sliding door; when the hangar sliding door is closed, the first oil cylinder and the second oil cylinder drive the lock hook assembly to enter the buckle plate in a first direction A, and then make the lock hook assembly apply pressure to the buckle plate in a second direction B; the first direction A is perpendicular to the second direction B.

Description

Technical Field

[0001] This invention relates to the field of hangar sealing technology, specifically to a tight-closing device and control method for hangar doors of aircraft used on polar expedition ships. Background Technology

[0002] When carrying out scientific expeditions to the Arctic and Antarctic, the Xue Long polar research vessel frequently traverses harsh sea areas such as the Roaring Forties, facing severe wave impacts, low-temperature icing, and hull structural deformation. The hangar, as a critical support facility for carrier-based aircraft, directly affects the safety of aircraft storage and the integrity of equipment through the sealing performance of its doors. Hanger doors typically employ a sliding door structure, relying on the door body moving along a track to open and close, and achieving a waterproof and wave-proof seal through the sealing strip on the inner side of the door panel and the pressure plate on the hangar wall. However, during long-term service, the hull structure undergoes cumulative deformation due to alternating loads, and the door body and pins also deform due to mechanical wear and the low-temperature environment. This causes the sealing strip to lose its uniform tightness with the pressure plate after the sliding door is closed, resulting in increased local gaps and loss of waterproof and wave-proof functions. Especially during polar voyages, where swells continuously pound the hull, if the hangar door seal fails, seawater may seep into the hangar, posing a serious safety hazard to aircraft equipment and electrical systems.

[0003] Existing locking mechanisms rely on high installation accuracy and structural rigidity for the engagement of the locking hook and the buckle plate. Once the door or pin is deformed, the relative position of the locking hook and the buckle plate will shift, causing the locking hook to fail to accurately enter the buckle plate, or although it can enter, the pressing direction deviates from the design direction, and it cannot form an effective pressing force. This results in problems such as door deformation leading to positioning difficulties, and reliance on sensors leading to system complexity and low reliability. Summary of the Invention

[0004] To overcome the above problems, the present invention provides a hangar door closing device for polar research vessel aircraft, comprising a hangar sliding door capable of closing with the hangar wall, a pressure plate provided on the wall panel of the hangar wall, a sealing strip provided on the inner side of the door panel of the hangar sliding door to cooperate with the pressure plate, and a closing device provided on the hangar sliding door and the hangar wall, the closing device keeping the sealing strip pressed tightly against the pressure plate when the hangar sliding door is closed; the closing device includes a first hydraulic cylinder and a second hydraulic cylinder connected to the hangar wall; a locking hook assembly is provided on the piston rod of the first hydraulic cylinder; a latch plate and a baffle are provided on the hangar sliding door; when the hangar sliding door is closed, the first hydraulic cylinder and the second hydraulic cylinder drive the locking hook assembly to enter the latch plate along a first direction A, and then cause the locking hook assembly to apply pressure to the latch plate along a second direction B; the first direction A is perpendicular to the second direction B.

[0005] Furthermore, the cylinder of the first hydraulic cylinder is connected to the hangar wall via a first hinge seat; the cylinder of the second hydraulic cylinder is connected to the hangar wall via a second hinge seat; the piston rod of the second hydraulic cylinder is connected to the cylinder of the first hydraulic cylinder via a third hinge seat; the first hydraulic cylinder drives the locking hook assembly to move along the second direction B, and the second hydraulic cylinder drives the locking hook assembly to move along the first direction A.

[0006] Furthermore, the locking hook assembly includes a base connected to the movable end of the piston rod of the first hydraulic cylinder, and a hook body is provided on the base; when the locking hook assembly is engaged with the buckle plate, the extension direction of the hook body is consistent with the first direction A; the cylinder of the first hydraulic cylinder is hinged to the first hinge seat through a first hinge shaft; when the locking hook assembly is engaged with the buckle plate, the buckle plate, the third hinge seat, and the first hinge shaft are substantially located on the same straight line.

[0007] Furthermore, the baffle is disposed on one side of the buckle plate, and the end face of the door panel between the baffle and the buckle plate is the second end face; the baffle has a first end face that protrudes from the second end face and extends along the second direction B; during the closing process of the hangar sliding door, the first end face of the baffle and the second end face between the baffle and the buckle plate guide the hook of the locking hook assembly into the buckle plate.

[0008] Furthermore, the hook body has a locking hook end face facing the second end face; a second roller is provided at one end of the locking hook end face near the base, and a first roller is provided at the other end of the locking hook end face; during the process of the baffle guiding the hook body into the buckle plate, the first roller cooperates with the second end face, and the second roller moves from the first end face to the second end face.

[0009] Furthermore, a balance valve is connected in series on the return oil line of the first oil cylinder. The pilot port of the balance valve is disconnected from the oil inlet side, and the return oil line is connected to an accumulator charged with a preset pressure. During the process of the baffle guiding the hook body into the buckle plate, when the first end face and the second end face squeeze the piston rod of the first oil cylinder, the oil pushes open the balance valve and enters the accumulator, and keeps the hook body in contact with the second end face.

[0010] The control method for the hangar door closing device of polar expedition ship aircraft of the present invention, using the above-mentioned aircraft hangar door closing device, includes the following steps: Step a: The hangar sliding door moves along the first direction A and completes the initial closure with the hangar wall; the first and second hydraulic cylinders are in their initial positions. Step b: The control system supplies oil to the second cylinder and drives its piston rod to extend to the maximum stroke, so that the first cylinder is pushed to the preset starting angle, and then controls the piston rod of the first cylinder to extend. Step c: The control system retracts the piston rod of the second cylinder, pulling the cylinder of the first cylinder to rotate around the first hinge axis, thus completing the hook body entering the buckle plate; Step d: The control system switches the hydraulic circuit and controls the piston rod of the first cylinder to retract. The retraction action of the first cylinder is converted into a pulling force on the buckle plate along the second direction B. In step e, the hydraulic system enters the pressure-holding state, maintaining the contraction force of the first cylinder, and the locking device completes the locking.

[0011] Furthermore, step b also includes controlling the locking hook assembly at the end of the piston rod of the first oil cylinder to move towards the baffle until the hook body of the locking hook assembly contacts the first end face of the baffle; the first end face squeezes the first oil cylinder in the oil supply state, and squeezes the second oil cylinder through the third hinge seat; after a first preset time, the control system stops the oil supply of the second oil cylinder. At this time, the first roller contacts the second end face, and the hook body and the buckle plate inlet are initially aligned.

[0012] Furthermore, step c also includes the following: the first oil cylinder maintains a continuous oil supply state; during the process of the second oil cylinder driving the first oil cylinder to rotate, the second end face forms a squeeze on the hook body, forcing the piston rod of the first oil cylinder to retract; when the piston rod retracts, the pressure in the return oil line increases, opening the series-connected balance valve, and the oil flows into the accumulator connected to it; since the accumulator is pre-charged with a preset pressure, the first oil cylinder continuously outputs thrust; the thrust keeps the first roller of the hook body always in contact with the second end face, and the second roller smoothly transitions from the first end face to the second end face, realizing impact-free rolling guidance.

[0013] Furthermore, step c also includes the second hydraulic cylinder continuously contracting, driving the first hydraulic cylinder to continue rotating; after a second preset time, the first hydraulic cylinder rotates to a state perpendicular to the second end face, at which point the hook body of the locking hook assembly enters the interior of the buckle plate; the buckle plate, the third hinge seat, and the first hinge shaft are basically on the same straight line, and the locking hook assembly and the buckle plate complete mechanical engagement, preparing for the pressing action.

[0014] The beneficial effects of this invention, compared with the prior art, are as follows: This invention adds a tight-closing device between the hangar sliding door and the hangar wall, consisting of a first hydraulic cylinder, a second hydraulic cylinder, a locking hook assembly, and a latch plate. After the hangar sliding door is closed, it can actively apply a clamping force along the second direction B, forcibly pulling the deformed door panel towards the hangar wall, so that the sealing strip and the pressure plate form a stable and reliable clamping seal. This effectively overcomes the problem of incomplete closure caused by long-term deformation of the door body and pin shaft, restores and maintains the waterproof and wave-proof function of the hangar door for a long time, and eliminates the safety hazard of seawater seeping into the hangar during polar voyages. The tight-closing device of this invention has a baffle adjacent to the latch plate, utilizing the first end face of the baffle and… The second end face forms a continuous mechanical guide surface. Together with the first and second rollers on the locking hook assembly, it enables passive positioning guidance of the locking hook assembly under conditions without position sensors. When the door body deforms and the position of the latch plate shifts, the locking hook assembly can still roll along the end face of the latch plate and accurately enter the interior of the latch plate. Compared with the complex structure of existing technologies that rely on position sensors for closed-loop control, this not only greatly simplifies the hardware structure and software logic of the control system and reduces manufacturing costs and the risk of sensor failure in low-temperature environments, but also ensures the long-term stable operation of the locking device under harsh polar conditions through a reliable combination of mechanical guidance and hydraulic self-adaptation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the polar expedition ship aircraft hangar door closing device of the present invention. Figure 2 This is a schematic diagram of the hangar door during the closing process of the present invention; Figure 3 This is a schematic diagram of the sealing device of the present invention; Figure 4 for Figure 3 Top view; Figure 5 This is a schematic diagram illustrating the operation of the hangar door closing device of the present invention. Figure 6 This is a schematic diagram of the hangar door locking device of the present invention after it has been locked. Figure 7 This is a schematic diagram of the locking hook assembly of the present invention; Figure 8 This is a control flowchart of the hangar door closing device of the present invention; In the picture: Hanger sliding door 100, door panel 101, sealing strip 102; hanger wall 200, wall panel 201, pressure plate 202; tight closing device 10; First hydraulic cylinder 1; Second hydraulic cylinder 2; Buckle plate 3; First hinge seat 4, first hinge shaft 41; second hinge seat 5; third hinge seat 6; Locking hook assembly 7, base 71, hook body 72, first roller 73, second roller 74, locking hook end face 75; Baffle 8, first end face 81, second end face 82; First direction A, second direction B. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] The present invention will now be described in detail with reference to the accompanying drawings. The polar research vessel aircraft hangar door closing device of the present invention includes a hangar sliding door 100 capable of closing with a hangar wall 200 of the hangar. A pressure plate 202 is provided on the wall panel 201 of the hangar wall 200. A sealing strip 102 cooperating with the pressure plate 202 is provided on the inner side of the door panel 101 of the hangar sliding door 100. A closing device 10 is provided on the hangar sliding door 100 and the hangar wall 200. When the hangar sliding door 100 is closed, the closing device 10 keeps the sealing strip 102 pressed tightly against the pressure plate 202 for a seal. The device 10 includes a first hydraulic cylinder 1 and a second hydraulic cylinder 2 connected to the hangar wall 200; a locking hook assembly 7 is provided on the piston rod of the first hydraulic cylinder 1; a latch plate 3 and a baffle 8 are provided on the hangar sliding door 100; when the hangar sliding door 100 is closed, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 drive the locking hook assembly 7 to enter the latch plate 3 along a first direction A, and then cause the locking hook assembly 7 to apply pressure to the latch plate 3 along a second direction B; the first direction A is perpendicular to the second direction B, wherein the latch plate 3 has a door-shaped structure, and the locking hook assembly 7 can extend into the interior of the door-shaped latch plate 3 to apply a pulling force to the latch plate 3.

[0018] When the second hydraulic cylinder 2 acts on the first hydraulic cylinder 1, the movement trajectory of the locking hook assembly 7 at the end of the piston rod of the first hydraulic cylinder 1 includes rotational motion. Therefore, the first direction A, as described above, in which the first hydraulic cylinder 1 and the second hydraulic cylinder 2 drive the locking hook assembly 7 into the buckle plate 3, is a general direction. Figure 2 As shown, in the control system of the locking device of the present invention, in order to simplify costs, it is not necessary to ensure that the first cylinder 1 is absolutely aligned with the second direction B when applying the locking force. Therefore, the pressure applied by the locking hook assembly 7 to the buckle plate 3 along the second direction B also refers to applying pressure approximately along the second direction B. Furthermore, the perpendicularity between the first direction A and the second direction B is also approximately perpendicular. According to Figure 2The hangar sliding door 100 moves back and forth along the first direction A to achieve the closing and opening of the hangar wall 200. The hangar wall 200 extends along the second direction B. Due to long-term use, the hangar doors of the polar research vessel have developed varying degrees of deformation of the door body and pins, resulting in incomplete door closure and failure to achieve the functions of waterproofing and wave protection. It is necessary to apply a clamping force along the second direction B to the hangar sliding door 100 when closing, so as to overcome the problem of incomplete closure of the hangar sliding door 100 caused by the deformation of the door body and pins.

[0019] The cylinder of the first hydraulic cylinder 1 is connected to the hangar wall 200 via the first hinge seat 4; the cylinder of the second hydraulic cylinder 2 is connected to the hangar wall 200 via the second hinge seat 5; the piston rod of the second hydraulic cylinder 2 is connected to the cylinder of the first hydraulic cylinder 1 via the third hinge seat 6; the first hydraulic cylinder 1 drives the locking hook assembly 7 to move along the second direction B, and the second hydraulic cylinder 2 drives the locking hook assembly 7 to move along the first direction A.

[0020] Specifically, the cylinder of the first hydraulic cylinder 1 is hinged to the first hinge seat 4. The second hydraulic cylinder 2 drives the first hydraulic cylinder 1 to rotate, which in turn drives the locking hook assembly 7 at the end of the piston rod of the first hydraulic cylinder 1 to move. Specifically, the swinging of the first hydraulic cylinder 1 causes the locking hook assembly 7 to move along an arc trajectory, that is, to move approximately along the first direction A. Figure 2 This allows the hook assembly 7 to move into the interior of the buckle plate 3. The extension and retraction of the first hydraulic cylinder 1 drives the hook assembly 7 to move approximately along the second direction B. Since the extension direction of the first hydraulic cylinder 1 may have a certain angle with the second direction B, the first hydraulic cylinder 1 drives the hook assembly 7 to move approximately along the second direction B. Thus, the first hydraulic cylinder 1 can drive the hook assembly 7 to move to one side of the buckle plate 3, preparing for the next step of driving the hook assembly 7 into the interior of the buckle plate 3 by the second hydraulic cylinder 2.

[0021] The locking hook assembly 7 includes a base 71 connected to the movable end of the piston rod of the first hydraulic cylinder 1, and a hook body 72 is provided on the base 71; when the locking hook assembly 7 is engaged with the buckle plate 3, the extension direction of the hook body 72 is consistent with the first direction A; the cylinder of the first hydraulic cylinder 1 is hinged to the first hinge seat 4 through the first hinge shaft 41; when the locking hook assembly 7 is engaged with the buckle plate 3, the buckle plate 3, the third hinge seat 6, and the first hinge shaft 41 are basically located on the same straight line.

[0022] The baffle 8 is disposed on one side of the buckle plate 3, and the end face of the door panel 101 between the baffle 8 and the buckle plate 3 is the second end face 82; the baffle 8 has a first end face 81 that protrudes from the second end face 82 and extends along the second direction B; during the closing process of the hangar sliding door 100, the first end face 81 of the baffle 8 and the second end face 82 between the baffle 8 and the buckle plate 3 guide the hook body 72 of the locking hook assembly 7 into the buckle plate 3.

[0023] Due to the deformation of the door panel 101 of the hangar sliding door 100, the position of the latch plate 3 on the door panel 101 cannot be positioned. By setting a baffle 8 that can guide the latch hook assembly 7, and in conjunction with the extension action of the first hydraulic cylinder 1, the latch hook assembly 7 can move and enter the latch plate 3 by conforming to the first end face 81 and the second end face 82. This simplifies the control of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and eliminates the need to set up sensors for identifying and positioning the latch plate 3.

[0024] The hook body 72 has a locking hook end face 75 facing the second end face 82; a second roller 74 is provided at one end of the locking hook end face 75 near the base 71, and a first roller 73 is provided at the other end of the locking hook end face 75; during the process of the baffle 8 guiding the hook body 72 into the buckle plate 3, the first roller 73 cooperates with the second end face 82, and the second roller 74 moves from the first end face 81 to the second end face 82.

[0025] A balance valve is connected in series on the return oil line of the first oil cylinder 1. The pilot port of the balance valve is disconnected from the oil inlet side, and the return oil line is connected to an accumulator charged with a preset pressure. During the process of the baffle 8 guiding the hook body 72 into the buckle plate 3, when the first end face 81 and the second end face 82 squeeze the piston rod of the first oil cylinder 1, the oil opens the balance valve and enters the accumulator, and keeps the hook body 72 in contact with the second end face 82.

[0026] Specifically, according to Figure 4-6 When the first end face 81 and the second end face 82 of the baffle 8 guide the locking hook assembly 7, the first hydraulic cylinder 1 is in a continuous oil supply state, and the second hydraulic cylinder 2 contracts and drives the first hydraulic cylinder 1 to rotate. The first end face 81 and the second end face 82 first squeeze the piston rod of the first hydraulic cylinder 1, so that the oil pushes open the balance valve and enters the accumulator. During the process of the first hydraulic cylinder 1 rotating to be perpendicular to the second end face 82, the accumulator causes the piston rod of the first hydraulic cylinder 1 to continuously output thrust, so that the hook body 72 of the locking hook assembly 7 always remains in contact with the second end face 82, until it moves to such a position. Figure 5In the indicated state, the first hydraulic cylinder 1 is controlled to retract, and the hook body 72 of the locking hook assembly 7 pulls the buckle plate 3, thereby applying a pulling force to the deformed door panel 101 to achieve a tight seal between the sealing strip 102 and the pressure plate 202.

[0027] The sealing device 10 of the present invention drives the locking hook assembly 7 to engage with the buckle plate 3 through the coordinated action of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and applies a pressing force to achieve a seal. The mechanical guidance of the baffle 8 replaces the position sensor, and the hydraulic adaptive mechanism of the balance valve and the accumulator overcomes the positioning deviation caused by the deformation of the door panel 101. Finally, the contraction action of the first hydraulic cylinder 1 is converted into a pulling force along the second direction B, forcing the sealing strip 102 to fit tightly with the pressure plate 202.

[0028] Specifically, the control method for the hangar door closing device of the polar expedition ship aircraft of the present invention includes the following steps: First, the hook body is pre-positioned. The hangar sliding door 100 moves along the first direction A and completes the initial closure with the hangar wall 200. The first hydraulic cylinder 1 and the second hydraulic cylinder 2 are in their initial positions. The control system supplies oil to the second cylinder 2 and drives its piston rod to extend to the maximum stroke, so that the first cylinder 1 is pushed to the preset starting angle; The control system supplies oil to the first cylinder 1 and drives its piston rod to extend. The locking hook assembly 7 at the end of the piston rod of the first cylinder 1 moves toward the baffle 8 until the hook body 72 of the locking hook assembly 7 contacts the first end face 81 of the baffle 8. The first end face 81 presses the first oil cylinder 1 in the oil supply state, and the second oil cylinder 2 is pressed by the third hinge seat 6. After the first preset time, the control system stops the oil supply of the second oil cylinder 2. At this time, the first roller 73 contacts the second end face 82, and the hook body 72 and the inlet of the buckle plate 3 are initially aligned. The control system causes the piston rod of the second cylinder 2 to retract, pulling the cylinder of the first cylinder 1 to rotate around the first hinge shaft 41; The hook body is mechanically guided and hydraulically adapted. During this process, the first oil cylinder 1 maintains a continuous oil supply state, and the piston rod tends to extend outward.

[0029] During the process of the second cylinder 2 driving the first cylinder 1 to rotate, the second end face 82 squeezes the hook body 72, forcing the piston rod of the first cylinder 1 to retract. When the piston rod retracts, the pressure in the return oil line increases, opening the series-connected balance valve, and the oil flows into the accumulator connected to it. Because the accumulator is pre-charged with a preset pressure, the system can maintain back pressure on the piston rod of the first cylinder 1, so that the first cylinder 1 continuously outputs thrust. This thrust keeps the first roller 73 of the hook body 72 in contact with the second end face 82, and the second roller 74 smoothly transitions from the first end face 81 to the second end face 82, achieving impact-free rolling guidance.

[0030] After the hook 72 enters the buckle plate 3, the second cylinder 2 continues to contract, driving the first cylinder 1 to continue rotating. After a second preset time, the first cylinder 1 rotates to a state perpendicular to the second end face 82. At this time, the hook 72 of the locking hook assembly 7 enters the interior of the buckle plate 3. In this state, the buckle plate 3, the third hinge seat 6, and the first hinge shaft 41 are basically on the same straight line. The locking hook assembly 7 and the buckle plate 3 complete mechanical engagement, preparing for the pressing action.

[0031] The system switches the hydraulic circuit to tighten and lock the door, controlling the piston rod of the first cylinder 1 to retract. Since the hook 72 has hooked the buckle plate 3 and the extension direction of the first cylinder 1 is approximately perpendicular to the second direction B, the retraction action of the first cylinder 1 is converted into a pulling force on the buckle plate 3 along the second direction B. The pulling force acts on the door panel 101 of the hangar sliding door 100, overcoming the resistance generated by the deformation of the door body and the pin, and forcibly pulling the door panel 101 closer to the hangar wall 200. The sealing strip 102 on the inner side of the door panel 101 fits against the pressure plate 202 on the wall panel 201, achieving the required clamping force.

[0032] The hydraulic system enters the pressure-holding state, maintaining the contraction force of the first cylinder 1, and the locking device 10 completes the locking, continuously providing stable clamping force under ship navigation and severe sea conditions, thus achieving waterproofing and wave protection for the aircraft hangar door.

[0033] In the guiding phase, this invention, through the cooperation of a balance valve and an accumulator, enables the first hydraulic cylinder 1 to maintain its output thrust even under external pressure, achieving full-range contact between the hook 72 and the second end face 82, effectively compensating for manufacturing and deformation errors in the door panel 101. The second hydraulic cylinder 2 drives the first hydraulic cylinder 1 to swing, achieving the entry action along the first direction A, while the extension and retraction of the first hydraulic cylinder 1 achieves the pressing action along the second direction B. The two actions are coordinated in timing, reducing the complexity of the control system. The control logic uses a first preset time and a second preset time as the basis for action switching, simplifying the reliance on position sensors and ensuring the reliability and repeatability of the control process.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hangar door closing device for a polar research vessel aircraft, comprising a hangar sliding door (100) capable of closing with a hangar wall (200) of the hangar, wherein a pressure plate (202) is provided on a wall panel (201) of the hangar wall (200), and a sealing strip (102) cooperating with the pressure plate (202) is provided on the inner side of the door panel (101) of the hangar sliding door (100), characterized in that: The hangar sliding door (100) and the hangar wall (200) are provided with a sealing device (10), which keeps the sealing strip (102) pressed and sealed against the pressure plate (202) when the hangar sliding door (100) is closed; The locking device (10) includes a first cylinder (1) and a second cylinder (2) connected to the hangar wall (200); The piston rod of the first oil cylinder (1) is provided with a locking hook assembly (7); The hangar sliding door (100) is equipped with a buckle plate (3) and a baffle plate (8); When the hangar sliding door (100) is closed, the first cylinder (1) and the second cylinder (2) drive the locking hook assembly (7) to enter the buckle plate (3) in the first direction A, and then the locking hook assembly (7) applies pressure to the buckle plate (3) in the second direction B; The first direction A is perpendicular to the second direction B.

2. The aircraft hangar door closing device according to claim 1, characterized in that: The cylinder barrel of the first hydraulic cylinder (1) is connected to the hangar wall (200) via the first hinge seat (4); The cylinder barrel of the second hydraulic cylinder (2) is connected to the hangar wall (200) via the second hinge seat (5); The piston rod of the second cylinder (2) is connected to the cylinder barrel of the first cylinder (1) through the third hinge seat (6); The first cylinder (1) drives the locking hook assembly (7) to move along the second direction B, and the second cylinder (2) drives the locking hook assembly (7) to move along the first direction A.

3. The aircraft hangar door closing device according to claim 2, characterized in that: The locking hook assembly (7) includes a base (71) connected to the movable end of the piston rod of the first oil cylinder (1), and a hook body (72) is provided on the base (71). When the locking hook assembly (7) engages with the buckle plate (3), the extension direction of the hook body (72) is consistent with the first direction A; The cylinder barrel of the first hydraulic cylinder (1) is hinged to the first hinge seat (4) via the first hinge shaft (41); When the hook assembly (7) engages with the buckle plate (3), the buckle plate (3), the third hinge seat (6), and the first hinge pin (41) are substantially on the same straight line.

4. The aircraft hangar door closing device according to any one of claims 1-3, characterized in that: The baffle (8) is disposed on one side of the buckle (3), and the end face of the door panel (101) between the baffle (8) and the buckle (3) is the second end face (82). The baffle (8) has a first end face (81) that protrudes from the second end face (82) and extends along the second direction B; During the closing process of the hangar sliding door (100), the first end face (81) of the baffle (8) and the second end face (82) between the baffle (8) and the buckle (3) guide the hook body (72) of the locking hook assembly (7) into the buckle (3).

5. The aircraft hangar door closing device according to claim 4, characterized in that: The hook body (72) has a locking hook end face (75) facing the second end face (82); A second roller (74) is provided at one end of the hook end face (75) near the base (71), and a first roller (73) is provided at the other end of the hook end face (75). During the process of the baffle (8) guiding the hook (72) into the buckle (3), the first roller (73) cooperates with the second end face (82), and the second roller (74) moves from the first end face (81) to the second end face (82).

6. The aircraft hangar door closing device according to claim 5, characterized in that: A balance valve is connected in series on the return oil line of the first oil cylinder (1). The pilot port of the balance valve is disconnected from the oil inlet side, and the return oil line is connected to an accumulator filled with a preset pressure. During the process of the baffle (8) guiding the hook (72) into the buckle (3), when the first end face (81) and the second end face (82) squeeze the piston rod of the first oil cylinder (1), the oil opens the balance valve and enters the accumulator, and keeps the hook (72) in contact with the second end face (82).

7. A control method for a hangar door closing device for polar expedition aircraft, employing the hangar door closing device as described in any one of claims 1-6, characterized in that, Includes the following steps: Step a, the hangar sliding door (100) moves along the first direction A and completes the initial closure with the hangar wall (200), and the first hydraulic cylinder (1) and the second hydraulic cylinder (2) are in the initial position; Step b, the control system supplies oil to the second cylinder (2) and drives its piston rod to extend to the maximum stroke, so that the first cylinder (1) is pushed to the preset starting angle, and then controls the piston rod of the first cylinder (1) to extend; Step c, the control system causes the piston rod of the second cylinder (2) to retract, pulling the cylinder of the first cylinder (1) to rotate around the first hinge shaft (41), and then the hook (72) enters the buckle plate (3). Step d: The control system switches the hydraulic circuit and controls the piston rod of the first cylinder (1) to retract. The retraction action of the first cylinder (1) is converted into a pulling force on the buckle plate (3) along the second direction B. In step e, the hydraulic system enters the pressure holding state, maintaining the contraction force of the first oil cylinder (1), and the locking device (10) completes the locking.

8. The control method for the hangar door closing device according to claim 7, characterized in that, Step b further includes controlling the locking hook assembly (7) at the end of the piston rod of the first oil cylinder (1) to move toward the baffle (8) until the hook body (72) of the locking hook assembly (7) contacts the first end face (81) of the baffle (8). The first end face (81) squeezes the first oil cylinder (1) in the oil supply state, and squeezes the second oil cylinder (2) through the third hinge seat (6); After the first preset time, the control system stops the oil supply of the second cylinder (2). At this time, the first roller (73) contacts the second end face (82), and the hook body (72) and the buckle plate (3) inlet are initially aligned.

9. The control method for the hangar door closing device according to claim 8, characterized in that, Step c further includes the following: the first oil cylinder (1) maintains a continuous oil supply state, and during the process of the second oil cylinder (2) driving the first oil cylinder (1) to rotate, the second end face (82) forms a squeeze on the hook body (72), forcing the piston rod of the first oil cylinder (1) to retract. When the piston rod retracts, the pressure in the return oil pipeline increases, opening the series-connected balance valve, and the oil flows into the accumulator connected to it. Because the accumulator is pre-charged with a preset pressure, the first cylinder (1) continuously outputs thrust. The thrust keeps the first roller (73) of the hook body (72) in contact with the second end face (82). The second roller (74) smoothly transitions from the first end face (81) to the second end face (82), achieving impact-free rolling guidance.

10. The control method for the hangar door closing device according to claim 9, characterized in that, Step c further includes the second cylinder (2) continuously contracting, driving the first cylinder (1) to continue rotating; After the second preset time, the first cylinder (1) rotates to a state perpendicular to the second end face (82), at which time the hook body (72) of the locking hook assembly (7) enters the interior of the buckle plate (3); The buckle plate (3), the third hinge seat (6), and the first hinge shaft (41) are basically on the same straight line. The locking hook assembly (7) and the buckle plate (3) complete the mechanical engagement to prepare for the pressing action.

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