Dual redundant drive structure for a flap system

Abstract

The utility model discloses a double redundancy drive structure of flap system, including gear drive structure, gear drive structure includes gear ring, planetary gear, sun gear, external gear, the inner circumferential surface of gear ring is set up annular internal tooth, the outer circumferential surface of gear ring is set up annular external tooth, sun gear coaxial line is arranged at the center place of gear ring, and gear ring and sun gear constitute annular meshing clearance between, a plurality of planetary gears are in the meshing clearance and are distributed in the circumferential array, and each planetary gear is set up with sun gear and the internal tooth on gear ring and meshes simultaneously, and external gear sets up at one side of gear ring, and with the external tooth on gear ring and meshing setting, sun gear and external gear can drive gear ring and each planetary gear rotate simultaneously or individually, through double independent motor and differential gear train, realize the conversion of double power input to single output power, and constitute double redundancy drive structure, guarantee the reliability of flap system operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of fixed-wing aircraft flap systems, and more specifically, it is a dual-redundant transmission structure for a flap system. Background Technology

[0002] The flap system of a fixed-wing aircraft is a critical component ensuring safe takeoff and landing. Its reliable operation directly determines the safety of takeoff and landing. However, the controller and motor in the flap system are the most prone to failure. The transmission structure of existing flap systems mostly adopts a non-redundant design with a single motor and a single controller. Once the controller or motor fails, the flaps will not be able to adjust normally, which will lead to flight safety hazards and make it difficult to meet the high reliability requirements of aircraft for critical systems. Summary of the Invention

[0003] Purpose of the invention: To overcome the shortcomings of the existing technology, this utility model provides a dual-redundant transmission structure for a flap system. Through dual independent motors and differential gear trains, it realizes the conversion from dual power input to single power output and forms a dual-redundant transmission structure to ensure the reliability of the flap system operation.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a dual-redundant transmission structure for a flap system, comprising a gear transmission structure. The gear transmission structure includes a gear ring, planetary gears, a sun gear, and an external gear. The gear ring has annular internal teeth on its inner circumference and annular external teeth on its outer circumference. The sun gear is coaxially positioned at the center of the gear ring, and an annular meshing gap is formed between the gear ring and the sun gear. A plurality of planetary gears are arranged in a circular array within the meshing gap, and each planetary gear simultaneously meshes with both the sun gear and the internal teeth on the gear ring. The external gear is positioned on one side of the gear ring and meshes with the external teeth on the gear ring. The sun gear and the external gear can simultaneously or individually drive the gear ring and each planetary gear to rotate.

[0005] Furthermore, it also includes a drive system, which includes a first motor and a second motor. The first motor and the second motor are respectively disposed on one side of the sun gear and the external gear, and the sun gear and the external gear are respectively coaxially mounted on the rotating shafts of the first motor and the second motor.

[0006] Furthermore, it also includes a planetary carrier, which is located on the side of the gear ring away from the first motor and the second motor. The planetary carrier includes a plurality of extension arms arranged in a circumferential array corresponding to each planetary gear. The ends of each extension arm that are close to each other converge at the same point, and the ends that are far from each other are provided with mounting shafts for mounting planetary gears. Each planetary gear is coaxially and rotatably mounted on each mounting shaft.

[0007] Furthermore, an output shaft is provided at the center of the planetary carrier on the side away from the gear ring, and the intersection point of each extension arm on the planetary carrier is located on the extension line of the output shaft axis; when each planet gear meshes with at least one of the internal teeth on the sun gear and the gear ring, the planetary carrier rotates at a constant speed under the combined action of each planet gear, thereby causing the output shaft to rotate at a constant speed around its own axis.

[0008] Furthermore, the first motor is provided with a first clutch, which is connected to the rotating shaft of the first motor. When the first motor is not in operation, the first clutch can engage with the rotating shaft of the first motor to limit its rotation, preventing the rotating shaft of the first motor from rotating.

[0009] Furthermore, the second motor is equipped with a second clutch, which is connected to the rotating shaft of the second motor. When the second motor is not in operation, the second clutch can engage with the rotating shaft of the second motor to limit its rotation, preventing the rotating shaft of the second motor from rotating.

[0010] Beneficial Effects: Compared with existing technologies, the dual-redundant transmission structure of the flap system of this utility model can effectively improve the reliability and safety of the flap transmission system of fixed-wing aircraft. Under normal operating conditions, the two independent motors operate synchronously and in the same direction, achieving linear superposition of motion through the differential gear train. This ensures that the output shaft drives the flap adjustment at a stable speed, while also sharing the load through dual power sources, reducing the operating pressure on individual motors and extending the service life of related components. When either motor or its associated controller suddenly fails, the clutch cooperating with the failed motor will quickly lock the shaft of the failed motor, preventing the shaft of the failed motor from interfering with the normal transmission of the differential gear train. At the same time, the other normal motor can independently drive the differential gear train, allowing the output shaft to continue driving the flap movement at a reasonable speed, ensuring that the flap adjustment function is uninterrupted. This fundamentally avoids the situation in existing technologies where a single power source failure leads to flight accidents, providing strong protection for aircraft takeoff and landing safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the forward structure of a dual-redundant transmission structure for a flap system according to the present invention;

[0012] Figure 2 This is a schematic diagram of the reverse structure of a dual-redundant transmission structure for a flap system according to this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figure 1As shown, a dual-redundant transmission structure for a flap system includes a gear transmission structure. The gear transmission structure includes a gear ring 1, planetary gears 2, a sun gear 3, and an external gear 4. The inner circumference of the gear ring 1 has annular internal teeth 5, and the outer circumference of the gear ring 1 has annular external teeth 6. The sun gear 3 is coaxially positioned at the center of the gear ring 1, and an annular meshing gap 7 is formed between the gear ring 1 and the sun gear 3. A plurality of planetary gears 2 are arranged in a circular array in the meshing gap 7, and each planetary gear 2 simultaneously meshes with the sun gear 3 and the internal teeth 5 on the gear ring 1. The external gear 4 is positioned on one side of the gear ring 1 and meshes with the external teeth 6 on the gear ring 1. The sun gear 3 and the external gear 4 can simultaneously or individually drive the gear ring 1 and each planetary gear 2 to rotate.

[0015] It also includes a drive system, which includes a first motor 8 and a second motor 9. The first motor 8 and the second motor 9 are respectively disposed on one side of the sun gear 3 and the external gear 4, and the sun gear 3 and the external gear 4 are respectively coaxially mounted on the rotating shafts of the first motor 8 and the second motor 9. The first motor 8 and the second motor 9 are independent of each other, and the first motor 8 and the second motor 9 can operate simultaneously or independently. When the first motor 8 and the second motor 9 operate simultaneously, the rotating shafts of the first motor 8 and the second motor 9 rotate in the same direction simultaneously.

[0016] The system also includes a planetary carrier 10, located on the side of the gear ring 1 away from the first motor 8 and the second motor 9. The planetary carrier 10 includes several extension arms 11 arranged in a circular array corresponding to each planetary gear 2. The ends of each extension arm 11 that are close to each other converge at the same point, and the ends that are far apart from each other are provided with mounting shafts 12 for mounting the planetary gears 2. Each planetary gear 2 is rotatably mounted on its respective mounting shaft 12 on the same axis. In the assembled state, the gear ring 1, planetary gears 2, sun gear 3, and external gear 4 are in the same plane. Each extension arm 11 of the planetary carrier 10 is located on the side of the gear ring 1 away from the first motor 8 and the second motor 9. The mounting shafts 12 of the planetary carrier 10 are in the meshing gap 7. That is, the gear ring 1, each planetary gear 2, sun gear 3, and external gear 4, etc., meshing transmission components are all meshed in the same plane. The planetary carrier 10 can ensure that the relative positions between each planetary gear 2 remain unchanged, thereby ensuring the stability and smoothness of the meshing transmission of each component.

[0017] Furthermore, the gear ring 1, planet gears 2, sun gear 3, and planet carrier 10 together constitute a differential gear train. In this differential gear train, the sun gear 3 and gear ring 1 serve as the two power input sources for the entire differential gear train. That is, the sun gear 3 can drive the entire differential gear train to move, and the gear ring 1 can also drive the entire differential gear train to move. The two movements mentioned above are not exactly the same, but the final output at the output end of the entire differential gear train is the same. The planet carrier 10 serves as the output end of the entire gear train and can couple the two movements driven by the two input sources. Since it is not easy to design a drive device on the gear ring 1, an external gear 4 is used as an intermediate transmission component for the gear ring 1 to obtain driving force. Therefore, the sun gear 3 and the external gear 4 can drive the gear ring 1 and each planet gear 2 to rotate simultaneously or individually, thereby driving the operation of the above differential gear train.

[0018] An output shaft 13 is located at the center of the planetary carrier 10 on the side away from the gear ring 1. The output shaft 13 is driven by the drive structure of the fixed-wing aircraft flap system, meaning that the output shaft 13 acts as a drive source to drive the drive structure of the fixed-wing aircraft flap system to perform related movements, thereby causing the flaps to make corresponding actions. The intersection point of each extension arm 11 on the planetary carrier 10 is located on the extension line of the axis of the output shaft 13. In the assembled state, the axis of the first motor 8 shaft is collinear with the axis of the output shaft 13, that is, the axis of the gear ring 1, the axis of the sun gear 3, the axis of the first motor 8 shaft, and the intersection point of each extension arm 11 on the planetary carrier 10 are collinear with the output shaft 13. The axes of the output shaft 13 are all collinear. When each of the planetary gears 2 meshes with at least one of the internal teeth 5 on the sun gear 3 and the gear ring 1, the planetary carrier 10 rotates at a constant speed under the combined action of the planetary gears 2, thereby causing the output shaft 13 to rotate at a constant speed around its own axis. When the first motor 8 and the second motor 9 are running simultaneously, the planetary carrier 10 rotates at its normal speed, that is, the output shaft 13 rotates at its normal speed around its own axis. When the first motor 8 or the second motor 9 is running alone, the planetary carrier 10 rotates at half its normal speed, that is, the output shaft 13 rotates at half its normal speed around its own axis.

[0019] The first motor 8 is equipped with a first clutch 14, which is connected to the shaft of the first motor 8. When the first motor 8 is not in operation, the first clutch 14 can engage with the shaft of the first motor 8 to prevent the shaft from rotating. In the assembled state, the first motor 8 and the first clutch 14 are connected in series and connected to the power supply. The first motor 8 also integrates a first controller, which can not only control the starting and stopping of the first motor 8 (i.e., connect or disconnect the electrical connection between the first motor 8 and the first clutch 14 and the power supply), but also control the rotational speed of the shaft of the first motor 8. When the first motor 8 and the first clutch 14 are connected in series and connected to the power supply, the first clutch 14 disengages from the shaft of the first motor 8, and the shaft of the first motor 8 can rotate freely. When the first motor 8 and the first clutch 14 are disconnected from the power supply, the first clutch 14 can lock the shaft of the first motor 8, thereby preventing the shaft of the first motor 8 from rotating.

[0020] The second motor 9 is equipped with a second clutch 15, which is connected to the shaft of the second motor 9. When the second motor 9 is not in operation, the second clutch 15 can engage with the shaft of the second motor 9 to prevent the shaft from rotating. In the assembled state, the second motor 9 and the second clutch 15 are connected in series and connected to the power supply. The second motor 9 also integrates a second controller, which can not only control the starting and stopping of the second motor 9 (i.e., connect or disconnect the electrical connection between the second motor 9, the second clutch 15 and the power supply), but also control the rotational speed of the shaft of the second motor 9. When the second motor 9 and the second clutch 15 are connected in series and connected to the power supply, the second clutch 15 disengages from the shaft of the second motor 9, allowing the shaft of the second motor 9 to rotate freely. When the second motor 9 and the second clutch 15 are disconnected from the power supply, the second clutch 15 can lock the shaft of the second motor 9, thus preventing the shaft of the second motor 9 from rotating.

[0021] The working principle of the dual-redundant transmission structure of the flap system described in this utility model:

[0022] When the dual-redundant transmission structure is in normal working condition, that is, both the first motor 8 and the second motor 9 are running, and the shafts of the first motor 8 and the second motor 9 rotate simultaneously in the same direction; more specifically, assuming the first motor 8 is in normal working condition, its shaft rotates clockwise, that is, the sun gear 3 rotates clockwise along its own axis. Since the sun gear 3 and each of the planet gears 2 are in an external meshing relationship, each of the planet gears 2 rotates counterclockwise around its own axis. Since each of the planet gears 2 and the internal teeth 5 of the gear ring 1 are in an internal meshing relationship, the gear ring 1 and each of the planet gears 2 rotate in the same direction, and the gear ring 1 rotates counterclockwise around its own axis. The external gear 4 and the external teeth 6 of the gear ring 1 are in an internal meshing relationship. Since it is an external meshing relationship, the direction of rotation of the external gear 4 should be opposite to that of the gear ring 1. The external gear 4 is driven by the shaft of the second motor 9, so the direction of rotation of the shaft of the second motor 9 is also clockwise, the same as that of the shaft of the first motor 8. Under the combined action of the planetary gears 2, the sun gear 3, and the gear ring 1, each planetary gear 2 revolves counterclockwise around the sun gear 3. Therefore, the planet carrier 10 rotates counterclockwise under the combined action of each planetary gear 2, thereby causing the output shaft 13 located at its center to rotate counterclockwise around its own axis. That is, the rotation direction of the output shaft 13 is the same as that of the gear ring 1, thereby driving the drive structure of the fixed-wing aircraft flap system to perform related movements, and thus enabling the flaps to adjust their own attitude.

[0023] When the second motor 9 or the second controller malfunctions, the second controller can disconnect the electrical connection between the second motor 9 and the second clutch 15 and the power supply. The second clutch 15 can lock the shaft of the second motor 9, preventing it from rotating. That is, the external gear 4 is in a fixed state and cannot rotate. Since the external gear 4 is meshed with the external teeth 6 on the gear ring 1, the gear ring 1 is also in a relatively fixed state and will not rotate when the external gear 4 is not rotating. At this time, the first motor 8, the first clutch 14, and the first controller are all in normal working condition. Therefore, the shaft of the first motor 8... The sun gear 3 is able to rotate clockwise around its own axis. Since the sun gear 3 and each of the planet gears 2 are in an external meshing relationship, each of the planet gears 2 rotates counterclockwise around its own axis. Since each of the planet gears 2 and the internal teeth 5 of the gear ring 1 are in an internal meshing relationship, each of the planet gears 2 revolves counterclockwise around the sun gear 3. Therefore, the planet carrier 10 rotates counterclockwise under the combined action of each of the planet gears 2, thereby causing the output shaft 13 located at its center to rotate counterclockwise around its own axis, thereby driving the drive structure of the fixed-wing aircraft flap system to perform related movements, and thus enabling the flaps to adjust their own attitude.

[0024] When the first motor 8 or the first controller malfunctions, the first controller can disconnect the electrical connection between the first motor 8 and the first clutch 14 and the power supply. The first clutch 14 can lock the shaft of the first motor 8, thus preventing the shaft of the first motor 8 from rotating, i.e., the sun gear 3 is in a fixed state and cannot rotate. At this time, the second motor 9, the second clutch 15, and the second controller are all in normal working condition. Therefore, the shaft of the second motor 9 can drive the external gear 4 to rotate clockwise around its own axis. Since the external gear 4 and the external teeth 6 on the gear ring 1 are externally meshed... Therefore, the gear ring 1 rotates counterclockwise around its own axis. Since each of the planetary gears 2 and the internal teeth 5 of the gear ring 1 are internally meshed, each of the planetary gears 2 rotates counterclockwise around its own axis. Under the drive of the gear ring 1, each of the planetary gears 2 revolves counterclockwise around the sun gear 3. Therefore, the planet carrier 10 rotates counterclockwise under the combined action of each of the planetary gears 2, thereby causing the output shaft 13 located at its center to rotate counterclockwise around its own axis. This drives the drive structure of the fixed-wing aircraft flap system to perform related movements, thereby enabling the flaps to adjust their own attitude.

[0025] Furthermore, when both the first motor 8 and the second motor 9 are in operation, i.e., when the sun gear 3 and the external gear 4 rotate simultaneously in the same direction, the differential gear train composed of the gear ring 1, planetary gears 2, sun gear 3, and external gear 4 follows the principle of linear superposition of motion. That is, in the differential gear train, the speed and torque transmission of the gears satisfy the linear law of rigid body motion, and multiple input sources are independent of each other and have a superposition effect. Simply put, assuming that when the dual redundant transmission structure is in normal working condition, i.e., when the first motor 8 and the second motor 9 drive the differential gear train as two input sources, the speed of the output shaft 13 under the simultaneous drive of the first motor 8 and the second motor 9 is N, then when the dual redundant transmission structure malfunctions, i.e., when the first motor 8 or the second motor 9 operates alone and drives the differential gear train as a single input source, the speed of the output shaft 13 under the individual drive of the first motor 8 or the second motor 9 is N / 2.

[0026] Furthermore, it should be emphasized that in the embodiments described in this utility model, when the dual redundant transmission structure is in normal working condition, both the first motor 8 and the second motor 9 are in operation. However, those skilled in the art can, with the same structure, configure the first motor 8 or the second motor 9 to operate independently when the dual redundant transmission structure is in normal working condition. When the operating motor fails, the non-operating motor serves as a backup input source to provide the power required by the flap system. Therefore, under the same structure and working principle, such a technical solution should also fall within the protection scope of this utility model.

[0027] Furthermore, the reason why this utility model ensures that both the first motor 8 and the second motor 9 are in operation when the dual redundant transmission structure is in normal working condition is not only because the dual input source formed by the first motor 8 and the second motor 9 can provide greater driving force, but also because the first motor 8 and the second motor 9 can share and evenly bear the load generated by the entire flap system, reducing the operating pressure of a single motor and extending the service life of the motor.

[0028] The above are the preferred embodiments described in this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A dual-redundant transmission structure for a flap system, characterized in that: The gear transmission structure includes a gear ring (1), planetary gears (2), a sun gear (3), and an external gear (4). The gear ring (1) has annular internal teeth (5) on its inner circumference and annular external teeth (6) on its outer circumference. The sun gear (3) is coaxially positioned at the center of the gear ring (1), and an annular meshing gap (7) is formed between the gear ring (1) and the sun gear (3). Several planetary gears (2) are arranged in a circular array in the meshing gap (7), and each planetary gear (2) meshes with the sun gear (3) and the internal teeth (5) on the gear ring (1). The external gear (4) is positioned on one side of the gear ring (1) and meshes with the external teeth (6) on the gear ring (1). The sun gear (3) and the external gear (4) can drive the gear ring (1) and each planetary gear (2) to rotate simultaneously or individually.

2. The dual-redundant transmission structure of a flap system according to claim 1, characterized in that: It also includes a drive system, which includes a first motor (8) and a second motor (9). The first motor (8) and the second motor (9) are respectively disposed on one side of the sun gear (3) and the external gear (4), and the sun gear (3) and the external gear (4) are respectively coaxially mounted on the shafts of the first motor (8) and the second motor (9).

3. The dual-redundant transmission structure of a flap system according to claim 1, characterized in that: It also includes a planetary carrier (10), which is located on the side of the gear ring (1) away from the first motor (8) and the second motor (9). The planetary carrier (10) includes a plurality of extension arms (11) arranged in a circular array corresponding to each planetary gear (2). The ends of each extension arm (11) that are close to each other meet at the same point, and the ends that are far from each other are provided with mounting shafts (12) for mounting the planetary gears (2). Each planetary gear (2) is coaxially mounted on each mounting shaft (12).

4. The dual-redundant transmission structure of a flap system according to claim 3, characterized in that: The planetary carrier (10) has an output shaft (13) located at the center of the side away from the gear ring (1), and the intersection of each extension arm (11) on the planetary carrier (10) is located on the extension line of the axis of the output shaft (13). When each planetary gear (2) meshes with at least one of the internal teeth (5) on the sun gear (3) and the gear ring (1), the planetary carrier (10) rotates at a constant speed under the combined action of each planetary gear (2), thereby causing the output shaft (13) to rotate at a constant speed around its own axis.

5. The dual-redundant transmission structure of a flap system according to claim 4, characterized in that: The first motor (8) is provided with a first clutch (14), which is connected to the shaft of the first motor (8). When the first motor (8) is not in operation, the first clutch (14) can engage with the shaft of the first motor (8) to limit the rotation, so that the shaft of the first motor (8) cannot rotate.

6. The dual-redundant transmission structure of a flap system according to claim 4, characterized in that: The second motor (9) is provided with a second clutch (15), which is connected to the shaft of the second motor (9). When the second motor (9) is not in operation, the second clutch (15) can engage with the shaft of the second motor (9) to limit the rotation, so that the shaft of the second motor (9) cannot rotate.

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