A drive control device and an aircraft landing gear retraction system

Abstract

This invention discloses a drive control device and an aircraft landing gear retraction system. The drive control device includes an outer cylinder and a first pipe connector and a second pipe connector connected to the outer cylinder. The outer cylinder contains a first cavity, and the first and second pipe connectors are arranged along the length of the outer cylinder. A piston rod is provided within the first cavity, with one end of the piston rod slidably connected to the inner wall of the first cavity. The outer end of the piston rod and the second pipe connector are located on the same side of the first pipe connector. The first pipe connector contains a first channel with a first interface, and the first channel communicates with the first cavity. A pressure relief assembly is provided on the first pipe connector, with one end of the pressure relief assembly communicating with the first channel. The second pipe connector contains a second channel with a second interface and a third interface. A moving component and a first elastic element are provided within the second channel. The drive control device of this invention solves the technical problems of large weight and system complexity in existing landing gear retraction systems.

Description

Technical Field

[0001] This invention belongs to the field of aircraft landing gear technology, specifically relating to a drive control device and an aircraft landing gear retraction and extension system. Background Technology

[0002] In traditional landing gear retraction systems, the retraction and extension of the doors and landing gear are typically achieved by driving retraction actuators. The coordinated control of the door and landing gear lowering sequence is generally achieved by a sequence valve, actuators, and control unit within the landing gear retraction system. This type of landing gear retraction system is relatively complex, has many components, and is heavy. It is generally suitable for medium and large aircraft landing gear, but not for small aircraft and UAV landing gear retraction systems where layout space is limited, system simplification is required, and weight is strictly limited. Summary of the Invention

[0003] In view of the existing technical problems, the present invention aims to provide a drive control device and an aircraft landing gear retraction system. The drive control device can solve the technical problems of large weight and system complexity of the existing landing gear retraction system.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A drive control device, characterized by the following structure: It includes an outer cylinder, and a first pipe connector and a second pipe connector connected to the outer cylinder. The outer cylinder has a first cavity along its length, and the first and second pipe connectors are arranged along the length of the outer cylinder. A piston rod is disposed within the first cavity, one end of which is slidably connected to the inner wall of the first cavity. The outer end of the piston rod penetrates the outer cylinder and extends outward. The outer end of the piston rod and the second pipe connector are located on the same side of the first pipe connector. A first channel is provided within the first pipe connector, and a first interface is provided on the first channel, which communicates with the first cavity. The device is equipped with a pressure relief assembly, one end of which is connected to a first channel; the second pipe joint is provided with a second channel, which has a second interface and a third interface; the second channel is provided with a moving assembly and a first elastic element, one end of which is connected to the second elastic element, and the outer end of which can extend into the first cavity; the outer end of which abuts against the piston end of the piston rod so that the third interface is connected to the second interface, or the moving assembly moves into the first cavity under the elastic force of the first elastic element so that the third interface and the second interface are separated by the moving assembly.

[0005] When the drive control device of this application is applied to an aircraft landing gear retraction system, the outer cylinder in the drive control device can serve as the door retraction actuator. The first and second interfaces are connected to the system piping, and the third interface is connected to the landing gear upper lock and the landing gear retraction actuator pipe interface. The outer end of the piston rod is connected to the aircraft door structure. When the pressure relief assembly is opened and the piston rod is pushed towards the side where the first pipe joint is located, the piston rod disengages from the outer end of the moving assembly. At this time, the moving assembly moves into the first cavity under the elastic force of the first elastic element. The third interface and the second interface are separated by the moving assembly, and the pressure in the first cavity is relieved by the pressure relief assembly. The system piping connected to the first interface is opened, and the pressure relief assembly is closed. The working medium of the system piping enters the rodless cavity of the first cavity through the first interface and the first channel. Under the action of the working medium, the piston rod moves towards the second pipe joint, causing the door connected to the piston rod to actuate. When the piston rod moves to the outer end of the moving assembly, the moving assembly moves towards the first elastic element under the push of the piston rod, compressing the first elastic element. Simultaneously, the third interface connects to the second interface. The working medium of the system pipeline enters the second channel through the second interface and then enters the landing gear upper lock and the landing gear retraction actuator through the third interface, controlling the movement of the landing gear upper lock and the landing gear retraction actuator. By setting up a drive control device, the coordinated control of the pressure supply sequence of the landing gear retraction system is achieved, solving the technical problems of large weight and system complexity in existing landing gear retraction systems. The drive control device of this application can also be applied to pneumatic or hydraulic equipment requiring sequential control, controlling the driving sequence of components connected to the piston rod and components connected to the third interface, respectively.

[0006] Preferably, the second channel includes a first section and a second section connected to each other, the first section of the second channel has a larger cross-sectional area than the second section of the second channel, and the second section of the second channel is connected to the first cavity; the first elastic element is disposed in the first section of the second channel, the second interface is connected to the first section of the second channel, and the third interface is connected to the second section of the second channel; one end of the moving component is disposed in the first section of the second channel, the outer end of the moving component is disposed in the second section of the second channel, and the outer end of the moving component is sealed to the inner wall of the second section of the second channel.

[0007] Preferably, the moving assembly includes a piston end and a push rod. The two ends of the piston end are connected to the push rod and a first elastic element, respectively. The piston end is disposed within a first section of the second channel. A second vent hole is provided on the piston end along its height direction. A sealing element is provided on the end face of the piston end connected to the push rod, and the second vent hole is located outside the sealing element. The push rod is disposed within a second section of the second channel. A second sealing ring is provided on the push rod circumferentially, and this second sealing ring seals against the inner wall of the second section of the second channel. When the outer end of the push rod moves into the second section of the second channel, the sealing element on the piston end disengages from the end face of the first section of the second channel, and the third interface connects with the second interface. When the outer end of the push rod moves into the first cavity, the sealing element on the piston end seals against the end face of the first section of the second channel, and the moving assembly separates the third interface from the second interface. By providing a second vent hole and a sealing element on the piston end, when the push rod moves into the first cavity, the piston end moves to the end of the first section of the second channel, and the sealing element seals against the end of the first section of the second channel, thereby preventing the third interface from connecting with the second interface. When the piston end moves toward the first elastic element side, the seal on the piston end separates from the end face of the second channel section, thereby connecting the third interface and the second interface through the second vent hole.

[0008] Preferably, the outer end of the push rod is provided with a first limiting part, which is arranged along the cross-sectional direction of the push rod; the outer cylinder is provided with a second mounting seat, and the second pipe joint is detachably and fixedly connected to the second mounting seat; the second mounting seat is provided with a second mounting hole, which communicates with the second channel section and the first cavity; the second mounting hole is provided with a second limiting part, and when the end of the push rod moves into the first cavity, the first limiting part can abut against the second limiting part. By setting the first limiting part and the second limiting part, the movement distance of the push rod is limited, thereby avoiding the push rod from moving too far into the first cavity and interfering with the piston rod.

[0009] Preferably, the piston rod includes a piston portion and a connecting rod connected to the piston portion. The connecting rod is arranged along the length direction of the outer cylinder, and the outer end of the connecting rod and the second pipe joint are located on the same side of the first pipe joint. The piston portion has a chamfer at one end near the connecting rod, which is opposite to the outer end of the moving assembly. A first groove is provided on the end face of the piston portion away from the connecting rod. The piston portion has a first sealing ring circumferentially arranged, which seals against the inner wall of the first cavity. The first sealing ring is located between the first channel and the moving assembly. By providing a chamfer as a guiding slope, it is easier to trigger the movement of the moving assembly.

[0010] Specifically, the first and second pipe connectors are respectively located at both ends of the outer cylinder along its length, and an end cap is provided on the end of the outer cylinder located on the side of the second pipe connector. The connecting rod contains a second cavity with at least two first vent holes, which are located at both ends of the second cavity along the length of the connecting rod. By providing the second cavity and the first vent holes, the gas in the rod chamber within the first cavity can be easily discharged, thus relieving pressure and preventing the moving component from being triggered when the piston rod has not reached its full output position.

[0011] Preferably, both the first pipe joint and the first channel are T-shaped structures, with the first interface and the pressure relief part respectively located at opposite ends of the horizontal section of the T-shaped structure, and the outer end of the vertical section of the first channel connected to the first cavity.

[0012] Preferably, the pressure relief assembly includes a pressure relief housing, a second elastic element disposed within the pressure relief housing, and a valve core. The pressure relief housing is detachably and fixedly connected to the first pipe joint. The two ends of the second elastic element are respectively connected to the first pipe joint and the valve core, and the outer end of the valve core extends outward through the pressure relief housing. The valve core has an exhaust hole along its length, and there is a gap between the central axis of the exhaust hole and the central axis of the valve core. The second elastic element can be a spring. When the piston rod needs to retract, it presses the valve core to move into the pressure relief housing, and the sealing surface on the valve core separates from the inner end face of the pressure relief housing. The working medium (air pressure or hydraulic pressure) in the first channel can be discharged to the outside through the exhaust hole on the valve core until the internal pressure of the rodless chamber in the first cavity is relieved, and then the piston rod is pushed to retract. When the first interface is connected to the system pipeline, under normal circumstances, the sealing surface on the valve core is pressed tightly against the inner end face of the pressure relief housing under the action of the spring and the system pressure, thus providing a sealing function.

[0013] Specifically, the outer cylinder is provided with a first mounting base, and the first pipe joint is detachably and fixedly connected to the first mounting base; the first mounting base is provided with a first mounting hole, which is connected to the first channel and the first cavity.

[0014] Based on the same inventive concept, this application also provides an aircraft landing gear retraction and extension system, which adopts the drive control device described above, wherein the outer end of the piston rod is connected to the door structure; the first interface and the second interface are respectively connected to the system pipeline, and the third interface is respectively connected to the landing gear upper lock and the landing gear retraction and extension actuator tube interface.

[0015] When a drive control device is applied to an aircraft landing gear retraction system, the outer cylinder of the drive control device is equivalent to an existing door retraction actuator. Existing door retraction actuators can only drive the door structure, thus controlling the door's movement. The aircraft landing gear retraction system of this invention integrates pressure supply sequence coordination control into the door retraction actuator by applying a drive control device. This gives the actuator not only conventional retraction functions but also pressure supply sequence control and depressurization functions. The aircraft landing gear retraction system of this invention has a simple and compact structure, realizing the normal retraction and extension functions of the actuator, as well as the door and landing gear lowering sequence control. Compared to traditional retraction actuators, it adds pressure supply sequence control functions, reduces system complexity, improves the landing gear system layout space, and simultaneously reduces the overall weight of the landing gear retraction system.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The aircraft landing gear retraction system of the present invention integrates the pressure supply sequence coordination control into the door retraction actuator by applying a drive control device, so that the door retraction actuator has not only conventional retraction functions, but also pressure supply sequence control and depressurization functions.

[0017] 2. The aircraft landing gear retraction system of the present invention has a simple and compact structure, realizes the normal retraction and extension function of the actuator, and controls the sequence of door and landing gear lowering. Compared with the traditional retraction actuator, it adds the function of pressure supply control sequence control, reduces system complexity, improves the layout space of the landing gear system, and reduces the weight index of the entire landing gear retraction system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the drive control device structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the piston rod at the end of its stroke; Figure 3 yes Figure 1 Schematic diagram of the connection structure between the first pipe joint and the pressure relief shell; Figure 4 yes Figure 1 Schematic diagram of the second pipe joint structure; Figure 5 yes Figure 1 Schematic diagram of the piston rod structure; Figure 6 yes Figure 1 Schematic diagram of the inner and outer cylinder structure.

[0019] In the diagram: 1-First pipe connector; 101-First channel; 2-Second pipe connector; 201-Second channel; 201-1-Second channel section 1; 201-2-Second channel section 2; 3-First interface; 4-Pressure relief assembly; 401-Pressure relief housing; 402-Second elastic element; 403-Valve core; 5-Outer cylinder; 501-First cavity; 502-First mounting base; 503-First mounting hole; 504-Second mounting base; 505-Second mounting hole; 6-Second interface; 7-Piston rod; 701- Piston section; 702-Connecting rod; 703-Chamfer; 704-First sealing ring; 705-First groove; 706-Sealing groove; 707-Internal threaded hole; 708-Second cavity; 709-First vent hole; 8-Bolt; 9-Third interface; 10-Moving assembly; 1001-Piston end; 1002-Push rod; 1003-Second sealing ring; 1004-Second vent hole; 1005-Seal; 11-Plug head; 12-First elastic element; 13-End cap; 14-Earring connector. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0021] like Figure 1 and Figure 6 As shown, the drive control device provided in this embodiment includes an outer cylinder 5, and a first pipe connector 1 and a second pipe connector 2 connected to the outer cylinder 5. A first cavity 501 is provided inside the outer cylinder 5 along its length direction. The first pipe connector 1 and the second pipe connector 2 are respectively disposed at both ends of the outer cylinder 5 along its length direction. Figure 6 As shown, the right end of the outer cylinder 5 is provided with an end cap 13, which is detachably and fixedly connected to the outer cylinder 5 by threads. A piston rod 7 is provided inside the first cavity 501. One end of the piston rod 7 is slidably connected to the inner wall of the first cavity 501, and the outer end of the piston rod 7 passes through the end cap 13 and extends outward. The outer end of the piston rod 7 and the second pipe connector 2 are located on the same side of the first pipe connector 1. By providing the end cap 13, the movement of the piston rod 7 can be restricted within the first cavity 501. Figure 1 and Figure 3As shown, the first pipe connector 1 has a first channel 101, and a first interface 3 is provided on the first channel 101. The first channel 101 is connected to the first cavity 501, and the first interface 3 is a threaded pipe interface. The first pipe connector 1 is provided with a pressure relief component 4, one end of which is connected to the first channel 101. Both the first pipe connector 1 and the first channel 101 are T-shaped structures, and the first interface 3 and the pressure relief component 4 are respectively located at opposite ends of the horizontal section of the T-shaped structure. Figure 6 As shown, a first mounting base 502 is provided on the left end of the outer cylinder 5, and a first mounting hole 503 is provided in the first mounting base 502. The lower end of the vertical section of the first pipe connector 1 is detachably and fixedly connected to the first mounting hole 503 by threads. The first mounting hole 503 is connected to both the first channel 101 and the first cavity 501. Figure 1 As shown, the pressure relief assembly 4 includes a pressure relief housing 401, a second elastic element 402 disposed within the pressure relief housing 401, and a valve core 403. The pressure relief housing 401 is detachably and fixedly connected to the first pipe connector 1 via threads. The two ends of the second elastic element 402 are respectively connected to the first pipe connector 1 and the valve core 403. The outer end of the valve core 403 extends outward through the pressure relief housing 401. An exhaust hole is provided on the valve core 403 along its length, and a gap is provided between the central axis of the exhaust hole and the central axis of the valve core 403. The second elastic element 402 can be a spring. When the piston rod 7 needs to retract, it presses the valve core 403 to move into the pressure relief housing 401. The sealing surface on the valve core 403 separates from the inner end face of the pressure relief housing 401. The working medium (air pressure or hydraulic pressure) in the first channel 101 can be discharged to the outside through the vent hole on the valve core 403 until the internal pressure of the rodless chamber in the first cavity 501 is relieved, pushing the piston rod 7 to retract. When the first interface 3 is connected to the system pipeline, under normal circumstances, the sealing surface on the valve core 403 is pressed tightly against the inner end face of the pressure relief housing 401 by the spring and system pressure, thus providing a sealing effect. Figure 1 and Figure 4As shown, the second pipe connector 2 has a second channel 201, on which a second interface 6 and a third interface 9 are provided. A moving component 10 and a first elastic element 12 are located within the second channel 201. The top of the second pipe connector 2 is sealed by a plug head 11, which seals the top of the second channel 201. The second channel 201 includes a first section 201-1 and a second section 201-2, both of which are vertical channels. The first section 201-1 has a larger cross-sectional area than the second section 201-2. The bottom of the second section 201-2 is connected to the first cavity 501. The first elastic element 12 is located within the first section 201-1 and is a spring; one end of the spring is connected to the plug head 11. The second interface 6 is connected to the first section 201-1, and the third interface 9 is connected to the second section 201-2. Figure 1 and Figure 2 As shown, the moving assembly 10 includes a piston end 1001 and a push rod 1002. The two ends of the piston end 1001 are connected to the push rod 1002 and the first elastic element 12, respectively. The piston end 1001 is disposed within the first section 201-1 of the second channel. A second vent hole 1004 is provided along the height direction on the piston end 1001. A sealing element 1005 is provided on the end face of the piston end 1001 connected to the push rod 1002, and the second vent hole 1004 is located outside the sealing element 1005. The push rod 1002 is disposed within the second section 201-2 of the second channel. A second sealing ring 1003 is provided along the circumferential direction on the push rod 1002, and the second sealing ring 1003 seals against the inner wall of the second section 201-2 of the second channel. Due to the provision of the second sealing ring 1003, the working medium in the second channel 201 cannot be transmitted to the first cavity 501. Figure 2 As shown, when the outer end of the push rod 1002 moves into the second channel section 201-2, that is, when the push rod 1002 pushes upward, the seal on the piston end 1001 separates from the end face of the second channel section 201-1, and the third interface 9 and the second interface 6 are connected through the second vent hole 1004. Figure 1 As shown, when the outer end of the push rod 1002 moves into the first cavity 501, the seal 1005 on the piston end 1001 seals with the end face of the second channel section 201-1, and the third interface 9 and the second interface 6 are separated by the moving assembly 10. A first limiting part 1003 is provided on the outer end of the push rod 1002, and this first limiting part 1003 is arranged along the cross-sectional direction of the push rod 1002. Figure 6As shown, a second mounting base 504 is provided on the right end of the outer cylinder 5. The lower end of the second pipe connector 2 is detachably fixed to the second mounting base 503 by bolts 8. A second mounting hole 505 is provided inside the second mounting base 504, which communicates with the second channel section 201-2 and the first cavity 501. A second limiting part 506 is provided inside the second mounting hole 505. When the outer end of the push rod 1002 moves into the first cavity 501, the first limiting part 1003 can abut against the second limiting part 506, thereby restricting the movement position of the push rod 1002 and preventing interference with the piston rod 7. Figure 1 and Figure 5 As shown, the piston rod 7 includes a piston portion 701 and a connecting rod 702 connected to the piston portion 701. The connecting rod 702 is arranged along the length direction of the outer cylinder 5. The outer end of the connecting rod 702 is provided with an internal threaded hole 707. The outer end of the connecting rod 702 and the second pipe connector 2 are located on the same side as the first pipe connector 1. The piston portion 701 is provided with a chamfer 703 at one end near the connecting rod 702. The chamfer 703 is opposite to the outer end of the push rod 1002. A first groove 705 is provided on the end face of the piston portion 701 away from the connecting rod 702. The piston portion 701 is provided with a sealing groove 706 in the circumferential direction. A first sealing ring 704 is provided in the sealing groove 706. The first sealing ring 704 seals with the inner wall of the first cavity 501. The first sealing ring 704 is located between the first channel 101 and the moving assembly 10. The connecting rod 702 has a second cavity 708, which has four first vent holes 709, two of which are located at both ends of the second cavity 708 along the length of the connecting rod 702.

[0022] This embodiment also provides an aircraft landing gear retraction and extension system, employing the drive control device described above. The outer end of the piston rod 7 is connected to the door structure via an earpiece connector 14. The first interface 3 and the second interface 6 are respectively connected to the system piping, and the third interface 9 is respectively connected to the landing gear upper lock and the landing gear retraction and extension actuator tube interface. To prevent loosening between the earpiece connector 14 and the piston rod 7, the earpiece connector 14 is provided with a locking washer and an anti-loosening nut.

[0023] When a drive control device is applied to an aircraft landing gear retraction system, the outer cylinder in the drive control device is equivalent to the existing door retraction actuator. The existing door retraction actuator can only control the opening and closing of the door by driving the door structure through the piston rod 7. For example... Figure 1As shown, piston rod 7 is located at the leftmost end of outer cylinder 5. The working medium in the system piping of the landing gear retraction system enters the first channel 101 through the first interface 3. At this time, the pressure relief assembly 4 is in a closed state to ensure no system pressure leakage. Simultaneously, under the pre-pressure of the first elastic element 12, the push rod 1002 causes the seal 1005 at the end of piston end 1001 to be tightly sealed with the sealing surface at the end of the second channel section 201-1, preventing communication between the working medium in the second interface 6 and the third interface 9. When the working medium enters the rodless chamber in the first cavity 501, the system pressure pushes piston rod 7 outwards, thereby driving the hatch structure to move. The gas inside the rod chamber in the first cavity 501 is depressurized through the first vent 709 and the second cavity 708. Figure 2 As shown, when the piston rod 7 extends to the end of its stroke, the chamfer 703 on the piston rod 7 presses against the contact surface E of the push rod 1002, pushing the push rod 1002 upward. The push rod 1002 pushes the piston end 1001 to move against the pre-pressure of the first elastic element 12. When the piston rod 7 extends to its position, the sealing surface between the seal 1005 at the end of the piston end 1001 and the end of the second channel section 201-1 is completely separated. At this time, the high-pressure medium in the system pipeline enters the third interface 9 through the second interface 6, the second channel 201, and the second vent 1004. The system pressure enters the landing gear upper lock and the retraction actuator, realizing the coordinated control of the door and landing gear lowering pressure sequence.

[0024] like Figure 1 As shown, when the piston cylinder retracts, a special tool is used to press the valve core 403 of the pressure relief assembly 4 to discharge the high-pressure medium in the first channel 101. Then, the piston rod 7 is moved to the left by the retraction device. When the chamfer 703 of the piston rod 7 disengages from the contact surface E of the push rod 1002, the push rod 1002 resets downward under the elastic force of the first elastic element 12. At this time, the channel between the second interface 6 and the third interface 9 is closed, and the piston rod 7 continues to move to the left until it is fully retracted.

[0025] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present embodiments by those skilled in the art will fall within the scope defined by the appended claims.

Claims

1. A drive control device, characterized in that: It includes an outer cylinder (5), and a first pipe joint (1) and a second pipe joint (2) connected to the outer cylinder (5). The outer cylinder (5) has a first cavity (501) along its length direction, and the first pipe joint (1) and the second pipe joint (2) are arranged along the length direction of the outer cylinder (5). The first cavity (501) is provided with a piston rod (7), one end of which is slidably connected to the inner wall of the first cavity (501), and the outer end of the piston rod (7) passes through the outer cylinder (5) and extends outward. The outer end of the piston rod (7) and the second pipe joint (2) are located on the same side of the first pipe joint (1). The first pipe joint (1) is provided with a first channel (101), and a first interface (3) is provided on the first channel (101). The first channel (101) is connected to the first cavity (501). The first pipe joint (1) is provided with a pressure relief component (4), one end of which is connected to the first channel (101); The second pipe fitting (2) is provided with a second channel (201), and the second channel (201) is provided with a second interface (6) and a third interface (9). The outer end of the piston rod (7) is connected to the hatch structure. The first interface (3) and the second interface (6) are respectively connected to the system pipeline. The third interface (9) is respectively connected to the landing gear upper lock and the landing gear retraction and extension actuator tube interface. The second channel (201) is provided with a moving component (10) and a first elastic element (12). One end of the moving component (10) is connected to the first elastic element (12), and the outer end of the moving component (10) can extend into the first cavity (501). The outer end of the moving component (10) abuts against the piston end of the piston rod (7) so that the third interface (9) is connected to the second interface (6), or the moving component (10) moves into the first cavity (501) under the elastic force of the first elastic element (12) so that the third interface (9) and the second interface (6) are separated by the moving component (10).

2. The drive control device according to claim 1, characterized in that: The second channel (201) includes a second channel section (201-1) and a second channel section (201-2) that are connected. The second channel section (201-1) has a larger cross-sectional area than the second channel section (201-2). The second channel section (201-2) is connected to the first cavity (501). The first elastic element (12) is disposed in the second channel section (201-1). The second interface (6) is connected to the second channel section (201-1). The third interface (9) is connected to the second channel section (201-2). One end of the moving component (10) is disposed in the second channel section (201-1). The outer end of the moving component (10) is disposed in the second channel section (201-2). The outer end of the moving component (10) is sealed to the inner wall of the second channel section (201-2).

3. The drive control device according to claim 2, characterized in that: The moving assembly (10) includes a piston end (1001) and a push rod (1002). The two ends of the piston end (1001) are connected to the push rod (1002) and the first elastic element (12), respectively. The piston end (1001) is located in the first section (201-1) of the second channel. A second vent hole (1004) is provided on the piston end (1001) along the height direction. A sealing element (1005) is provided on the end face of the piston end (1001) connected to the push rod (1002). The second vent hole (1004) is located outside the sealing element (1005). The push rod (1002) is located in the second section (201-2) of the second channel. A first elastic element (12) is provided on the push rod (1002) along the circumferential direction. Two sealing rings (1003) are sealed to the inner wall of the second channel section (201-2); when the outer end of the push rod (1002) moves into the second channel section (201-2), the seal (1005) on the piston end (1001) is separated from the end face of the first channel section (201-1), and the third interface (9) is connected to the second interface (6); when the outer end of the push rod (1002) moves into the first cavity (501), the seal (1005) on the piston end (1001) is sealed to the end face of the first channel section (201-1), and the third interface (9) and the second interface (6) are separated by the moving component (10).

4. The drive control device according to claim 3, characterized in that: The outer end of the top rod (1002) is provided with a first limiting part, which is arranged along the cross-sectional direction of the top rod (1002); the outer cylinder (5) is provided with a second mounting seat (504), and the second pipe joint (2) is detachably and fixedly connected to the second mounting seat (504); the second mounting seat (504) is provided with a second mounting hole (505), which is connected to the second channel section (201-2) and the first cavity (501); the second mounting hole (505) is provided with a second limiting part, and when the end of the top rod (1002) moves into the first cavity (501), the first limiting part and the second limiting part abut against each other.

5. The drive control device according to claim 1, characterized in that: The piston rod (7) includes a piston part (701) and a connecting rod (702) connected to the piston part (701). The connecting rod (702) is arranged along the length direction of the outer cylinder (5). The outer end of the connecting rod (702) and the second pipe joint (2) are located on the same side of the first pipe joint (1). The piston part (701) has a chamfer (703) at one end near the connecting rod (702). The chamfer (703) is opposite to the outer end of the moving assembly (10). A first groove (705) is provided on the end face of the piston part (701) away from the connecting rod (702). The piston part (701) is provided with a first sealing ring (704) in the circumferential direction. The first sealing ring (704) is sealed with the inner wall of the first cavity (501). The first sealing ring (704) is located between the first channel (101) and the moving assembly (10).

6. The drive control device according to claim 5, characterized in that: The first pipe joint (1) and the second pipe joint (2) are respectively located at both ends of the outer cylinder (5) along the length direction. The end of the outer cylinder (5) located on the side of the second pipe joint (2) is provided with an end cap (13). The connecting rod (702) is provided with a second cavity (708). The second cavity (708) is provided with at least two first vent holes (709), wherein the two first vent holes (709) are located at both ends of the second cavity (708) along the length direction of the connecting rod (702).

7. The drive control device according to claim 1, characterized in that: The first pipe joint (1) and the first channel (101) are both T-shaped structures. The first interface (3) and the pressure relief component (4) are respectively located at the opposite ends of the horizontal section of the T-shaped structure. The outer end of the vertical section of the first channel (101) is connected to the first cavity (501).

8. The drive control device according to claim 7, characterized in that: The pressure relief assembly (4) includes a pressure relief housing (401), a second elastic element (402) disposed in the pressure relief housing (401), and a valve core (403). The pressure relief housing (401) is detachably and fixedly connected to the first pipe joint (1). The two ends of the second elastic element (402) are respectively connected to the first pipe joint (1) and the valve core (403). The outer end of the valve core (403) extends outward through the pressure relief housing (401). The valve core (403) is provided with an exhaust hole along its length direction. There is a gap between the central axis of the exhaust hole and the central axis of the valve core (403).

9. The drive control device according to claim 1, characterized in that: The outer cylinder (5) is provided with a first mounting seat (502), and the first pipe joint (1) is detachably and fixedly connected to the first mounting seat (502); the first mounting seat (502) is provided with a first mounting hole (503), and the first mounting hole (503) is connected to the first channel (101) and the first cavity (501).

10. An aircraft landing gear retraction system, characterized in that: The drive control device as described in any one of claims 1 to 9 is used.

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