A wing folding and unfolding mechanism driving system and a method for operating the same

Abstract

The application belongs to the technical field of wing folding and unfolding mechanism driving design, and particularly relates to a wing folding and unfolding mechanism driving system and a control method thereof, wherein the wing folding and unfolding mechanism driving system comprises a hydraulic electromagnetic valve, an actuating cylinder, a shuttle valve, a high-pressure gas cylinder, a gas pressure electromagnetic valve, an inflation valve and a position switch; the hydraulic electromagnetic valve is connected with a hydraulic source through an oil inlet pipeline and an oil return pipeline, and is connected with a rod cavity and a rodless cavity of the actuating cylinder through a pipeline; the pipeline connected with the rod cavity and the rodless cavity is provided with the shuttle valve; a piston rod of the actuating cylinder is connected with the wing folding and unfolding mechanism; the two shuttle valves are connected with the high-pressure gas cylinder through a pipeline; the pipeline connected with the high-pressure gas cylinder is provided with the gas pressure electromagnetic valve; the inflation valve is connected with the high-pressure gas cylinder through a pipeline and is connected with a high-pressure gas source; and the position switch has two, which are connected with the actuating cylinder body and are used for detecting whether the wing folding and unfolding is in place respectively.

Description

Technical Field

[0001] This application belongs to the field of wing folding and flattening mechanism drive design technology, specifically relating to a wing folding and flattening mechanism drive system and its control method. Background Technology

[0002] To reduce the space occupied by aircraft when parked on the ground, on deck, or in warehouses, the wings are designed to be foldable. A drive system connects to a folding and flattening mechanism to drive the wings, flattening them when the aircraft takes off and folding them when the aircraft is parked.

[0003] Currently, most wing folding and unfolding mechanisms use two hydraulic systems to drive the mechanism via actuators. If one hydraulic system fails, the other is activated to drive the mechanism, causing the wing to unfold and fold. While this approach provides redundancy, it has the following drawbacks:

[0004] 1) The hydraulic system is quite heavy. The design uses a dual-redundant hydraulic system to drive the wing folding and flattening mechanism, which greatly increases the weight of the aircraft.

[0005] 2) When one hydraulic system fails and another hydraulic system is used to drive the wing folding and flattening mechanism, the valve needs to be switched manually, which is inconvenient.

[0006] This application is made in view of the aforementioned technical deficiencies. Summary of the Invention

[0007] The purpose of this application is to provide a wing folding and flattening mechanism drive system and its control method to overcome or mitigate at least one of the known technical defects.

[0008] The technical solution of this application is:

[0009] On the one hand, a wing folding and flattening mechanism drive system is provided, including: a hydraulic solenoid valve, an actuator, a shuttle valve, a high-pressure gas cylinder, a pneumatic solenoid valve, an inflation valve, and a position switch;

[0010] The hydraulic solenoid valve is connected to the hydraulic power source through inlet and return oil lines, and is also connected to the rod chamber and rodless chamber of the actuator through lines. A shuttle valve is installed on the lines connecting the rod chamber and rodless chamber. The piston rod of the actuator is connected to the wing folding and flattening mechanism.

[0011] Two shuttle-shaped valves are connected to a high-pressure gas cylinder via pipelines, and a gas pressure solenoid valve is installed on the pipelines connecting the two shuttle-shaped valves to the high-pressure gas cylinders.

[0012] The inflation valve is connected to a high-pressure gas cylinder via a pipeline, which in turn connects to a high-pressure gas source.

[0013] There are two position switches, connected to the actuator cylinder, used to detect whether the wing folding or flattening is in place.

[0014] Optionally, in the aforementioned wing folding and flattening mechanism drive system, two position detection plates are installed on the actuator cylinder in conjunction with position switches. When the wing is folded or flattened in place, the contacting position detection plate moves closer to the corresponding position switch, triggering the corresponding position switch, thereby detecting whether the wing folding or flattening is in place.

[0015] Optionally, in the aforementioned wing folding and flattening mechanism drive system, the hydraulic solenoid valve is connected to the aircraft control system for on / off control and flow direction control, the pneumatic solenoid valve is connected to the aircraft control system for opening and closing control, and the position switch is connected to the aircraft control system to detect whether the wing folding and flattening are in place.

[0016] Optionally, in the aforementioned wing folding and flattening mechanism drive system, there are two high-pressure gas cylinders and their corresponding inflation valves, with the two high-pressure gas cylinders connected to the two shuttle-shaped valves respectively via pipelines.

[0017] On the other hand, a method for controlling a wing folding and flattening mechanism drive system is provided, for controlling the aforementioned wing folding and flattening mechanism drive system, including:

[0018] When the hydraulic power supply is normal, the oil inlet and outlet of the rod chamber and rodless chamber of the actuator are controlled by the hydraulic solenoid valve, which causes the piston rod to extend and retract, driving the wing folding and flattening mechanism to flatten and fold the wing. After the wing is flattened and folded in place, the wing is locked.

[0019] If the piston of the actuator extends, it folds the wing; if it retracts, it flattens the wing. If the hydraulic pressure supply is abnormal when the wing is folded and flattening is required, the pneumatic solenoid valve corresponding to the rod chamber of the actuator is opened, allowing high-pressure gas from the high-pressure cylinder to enter the rod chamber through the corresponding shuttle valve, causing the piston rod to retract and flatten the wing. After the wing is flattened, it is locked. If the hydraulic pressure supply is abnormal when the wing is flattened and folding is required, the pneumatic solenoid valve corresponding to the rodless chamber of the actuator is opened, allowing high-pressure gas from the high-pressure cylinder to enter the rodless chamber through the corresponding shuttle valve, causing the piston rod to extend and fold the wing. After the wing is folded, it is locked.

[0020] If the piston of the actuator cylinder extends, it flattens the wing; if it retracts, it folds the wing. If the hydraulic pressure supply is abnormal when the wing is folded and needs to be flattened, the pneumatic solenoid valve corresponding to the rodless chamber of the actuator cylinder is opened, allowing high-pressure gas from the high-pressure cylinder to enter the rodless chamber through the corresponding shuttle valve, causing the piston rod to extend and flatten the wing. After the wing is flattened, it is locked. If the hydraulic pressure supply is abnormal when the wing is flattened and needs to be folded, the pneumatic solenoid valve corresponding to the rod chamber of the actuator cylinder is opened, allowing high-pressure gas from the high-pressure cylinder to enter the rod chamber through the corresponding shuttle valve, causing the piston rod to retract and fold the wing. After the wing is folded, it is locked. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the wing folding and flattening mechanism drive system provided in an embodiment of this application;

[0022] Figure 2 This is another schematic diagram of the wing folding and flattening mechanism drive system provided in the embodiments of this application;

[0023] in:

[0024] 1-Hydraulic solenoid valve; 2-Actuating cylinder; 3-Shuttle valve; 4-High-pressure gas cylinder; 5-Pneumatic solenoid valve; 6-Inflation valve; 7-Position switch;

[0025] A - Rod-type cavity; B - Rodless cavity.

[0026] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. Furthermore, the drawings are for illustrative purposes only and should not be construed as limiting this application. Detailed Implementation

[0027] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0028] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms indicating direction used in this application description are used only to indicate relative direction or positional relationship; when the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "comprising" as used in this application description indicates that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, but does not exclude other elements or objects.

[0029] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0030] A wing folding and flattening mechanism drive system, such as Figure 1 As shown, it includes a hydraulic solenoid valve 1, an actuator cylinder 2, a shuttle valve 3, a high-pressure gas cylinder 4, a pneumatic solenoid valve 5, an inflation valve 6, and a position switch 7.

[0031] The hydraulic solenoid valve 1 is connected to the hydraulic power source through the oil inlet and return pipelines, and is also connected to the rod chamber A and rodless chamber B of the actuator cylinder 2 through the pipeline. A shuttle valve 3 is installed on the pipeline connecting the rod chamber A and the rodless chamber B. The piston rod of the actuator cylinder 2 is connected to the wing folding and flattening mechanism.

[0032] Two shuttle-shaped valves 3 are connected to a high-pressure gas cylinder 4 via pipelines, and a gas pressure solenoid valve 5 is installed on the pipelines connecting the two shuttle-shaped valves 3 to the high-pressure gas cylinder 4.

[0033] The inflation valve 6 is connected to the high-pressure gas cylinder 4 via a pipeline, and is connected to a high-pressure gas source to inflate the high-pressure gas cylinder 4.

[0034] There are two position switches 7 connected to the cylinder body of actuator 2. They are used to detect whether the wing is folded or flattened in place. Specifically, position detection plates can be set on the cylinder body of actuator 2 in conjunction with the two position switches 7. When the wing is folded or flattened in place, the position detection plate will move closer to the corresponding position switch 7, triggering the corresponding position switch 7, thereby detecting whether the wing is folded or flattened in place.

[0035] The wing folding and flattening mechanism drive system disclosed above can be operated by referring to the following method:

[0036] When the hydraulic power supply is normal, the oil inlet and outlet of the rod chamber A and rodless chamber B of the actuator cylinder 2 are controlled by the hydraulic solenoid valve 1, which causes the piston rod to extend and retract, driving the wing folding and flattening mechanism, and causing the wing to flatten and fold. After the wing is flattened and folded in place, the wing is locked.

[0037] If the piston of actuator cylinder 2 extends, it drives the wing to fold; if it retracts, it drives the wing to flatten. When the wing is folded and the hydraulic pressure supply is abnormal, requiring flattening, the pneumatic solenoid valve 5 corresponding to the rod chamber A of actuator cylinder 2 is opened, allowing high-pressure gas from high-pressure gas cylinder 4 to enter the rod chamber A through the corresponding shuttle valve 3, causing the piston rod to retract and drive the wing to flatten. After the wing is flattened, it is locked. When the wing is flattened and the hydraulic pressure supply is abnormal, requiring folding, the pneumatic solenoid valve 5 corresponding to the rodless chamber B of actuator cylinder 2 is opened, allowing high-pressure gas from high-pressure gas cylinder 4 to enter the rodless chamber B through the corresponding shuttle valve 3, causing the piston rod to extend and drive the wing to fold. After the wing is folded, it is locked.

[0038] If the piston of actuator cylinder 2 extends, it flattens the wing; if it retracts, it folds the wing. When the wing is folded, the hydraulic pressure supply is abnormal, and flattening is required. The pneumatic solenoid valve 5 corresponding to the rodless chamber B of actuator cylinder 2 is opened, allowing high-pressure gas from high-pressure cylinder 4 to enter the rodless chamber B through the corresponding shuttle valve 3, causing the piston rod to extend and flatten the wing. After the wing is flattened, it is locked. When the wing is flattened, the hydraulic pressure supply is abnormal, and folding is required, the pneumatic solenoid valve 5 corresponding to the rod chamber A of actuator cylinder 2 is opened, allowing high-pressure gas from high-pressure cylinder 4 to enter the rod chamber A through the corresponding shuttle valve 3, causing the piston rod to retract and fold the wing. After the wing is folded, it is locked.

[0039] Hydraulic solenoid valve 1 can be connected to the aircraft control system for on / off and flow direction control; pneumatic solenoid valve 5 can be connected to the aircraft control system for opening and closing control; and position switch 7 can be connected to the aircraft control system to detect whether the wing is folded or flattened in place.

[0040] The wing folding and flattening mechanism drive system disclosed in the above embodiments is designed to drive the actuator cylinder 2 with hydraulic pressure when the hydraulic source is in normal condition, thereby driving the wing to flatten and fold. When the hydraulic source is in abnormal condition, high-pressure air can be used to drive the actuator cylinder 2 to drive the wing to flatten and fold, for emergency use. While achieving redundancy design, the shuttle-shaped valve 3 is used to adaptively switch the hydraulic and pneumatic drive of the actuator cylinder 2. The overall structure is simple, easy to arrange, can reduce the overall weight of the aircraft, and does not require manual switching operation, making it convenient to operate.

[0041] In the wing folding and flattening mechanism drive system, using only one high-pressure gas cylinder 4 can minimize the overall weight of the aircraft. However, considering fault isolation, two high-pressure gas cylinders 4 and their corresponding inflation valves 6 can also be designed, with the two high-pressure gas cylinders 4 connected to two shuttle-shaped valves 3 respectively via pipelines. Figure 2 As shown.

[0042] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A drive system for a wing folding and flattening mechanism, characterized in that, include: Hydraulic solenoid valve (1), actuator (2), shuttle valve (3), high-pressure gas cylinder (4), pneumatic solenoid valve (5), inflation valve (6), position switch (7); The hydraulic solenoid valve (1) is connected to the hydraulic power source through the oil inlet and return pipelines, and is connected to the rod chamber (A) and rodless chamber (B) of the actuator (2) through the pipeline. A shuttle valve (3) is installed on the pipeline connecting the rod chamber (A) and rodless chamber (B). The piston rod of the actuator (2) is connected to the wing folding and flattening mechanism. Two shuttle valves (3) are connected to a high-pressure gas cylinder (4) through pipelines, and a gas pressure solenoid valve (5) is installed on the pipeline connecting the two shuttle valves (3) to the high-pressure gas cylinder (4). The inflation valve (6) is connected to the high-pressure gas cylinder (4) via a pipeline, and connected to the high-pressure gas source; There are two position switches (7), which are connected to the cylinder of the actuator (2) and are used to detect whether the wing folding and flattening are in place; Two position detection plates are set on the cylinder body of the actuator (2) in conjunction with two position switches (7). When the wing is folded and flattened into position, the contact position detection plate moves closer to the corresponding position switch (7) and triggers the corresponding position switch (7), thereby detecting whether the wing is folded and flattened into position. The hydraulic solenoid valve (1) is connected to the aircraft control system for on / off control and flow direction control, the pneumatic solenoid valve (5) is connected to the aircraft control system for opening and closing control, and the position switch (7) is connected to the aircraft control system to detect whether the wing folding and flattening are in place. There are two high-pressure gas cylinders (4) and their corresponding inflation valves (6). The two high-pressure gas cylinders (4) are connected to the two shuttle valves (3) respectively through pipelines.

2. A method for controlling a wing folding and flattening mechanism drive system, used to control the wing folding and flattening mechanism drive system as described in claim 1, characterized in that... include: When the hydraulic power supply is normal, the oil inlet and outlet of the rod chamber (A) and rodless chamber (B) of the actuator cylinder (2) are controlled by the hydraulic solenoid valve (1) to extend and retract the piston rod, drive the wing folding and flattening mechanism, and drive the wing to flatten and fold. After the wing is flattened and folded in place, the wing is locked. If the piston of the actuator (2) extends, it drives the wing to fold and retracts, causing the wing to flatten. When the wing is folded, the hydraulic power supply is abnormal and it needs to be flattened, the pneumatic solenoid valve (5) corresponding to the rod chamber (A) of the actuator (2) is opened, so that the high-pressure gas in the high-pressure gas cylinder (4) enters the rod chamber (A) through the corresponding shuttle valve (3), causing the piston rod to retract and drive the wing to flatten. After the wing is flattened, the wing is locked. When the wing is flattened, the hydraulic power supply is abnormal and it needs to fold, the pneumatic solenoid valve (5) corresponding to the rodless chamber (B) of the actuator (2) is opened, so that the high-pressure gas in the high-pressure gas cylinder (4) enters the rodless chamber (B) through the corresponding shuttle valve (3), causing the piston rod to extend and drive the wing to fold. After the wing is folded, the wing is locked. If the piston of the actuator (2) extends, it drives the wing to flatten, and retracts, it drives the wing to fold. When the wing is folded, the hydraulic power supply is abnormal and it needs to be flattened, the pneumatic solenoid valve (5) corresponding to the rodless chamber (B) of the actuator (2) is opened, so that the high-pressure gas in the high-pressure gas cylinder (4) enters the rodless chamber (B) through the corresponding shuttle valve (3), causing the piston rod to extend and drive the wing to flatten. After the wing is flattened, the wing is locked. When the wing is flattened, the hydraulic power supply is abnormal and it needs to be folded, the pneumatic solenoid valve (5) corresponding to the rod chamber (A) of the actuator (2) is opened, so that the high-pressure gas in the high-pressure gas cylinder (4) enters the rod chamber (A) through the corresponding shuttle valve (3), causing the piston rod to retract and drive the wing to fold. After the wing is folded, the wing is locked.

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