Solar wing unfolding speed control and surface tensioning device

Abstract

The invention relates to a solar wing unfolding speed control and surface tensioning device, and aims to solve the problem of how to realize automatic speed control unfolding and specific pre-tightening force tensioning after a solar wing is completely unfolded by an unfolding mechanism. The device comprises a solar blanket center reel, a tensioning transmission belt, an unfolding end support, a guide wheel, a belt storage wheel, a driving motor, a driving wheel, a fixed end support, a speed control transmission belt and the like. The driving wheel is driven by the driving motor, coordinated action of the speed control transmission belt and the tensioning transmission belt is achieved, the speed control transmission belt controls the rolling unfolding speed of the solar blanket, and the tensioning transmission belt tensions the solar blanket after the solar blanket is completely unfolded. In the unfolding process of the solar wing, the device can adapt to different gravitational field environments, damage of impact loads to the solar wing is effectively avoided, meanwhile, stable tensioning force is provided, and wing face tensioning is guaranteed. The device has the advantages of being simple in structure, convenient to operate, high in bearing capacity, low in impact and the like, and is suitable for unfolding and tensioning the reel type solar wing.

Description

Technical Field

[0001] The present invention relates to a device for controlling the deployment speed and surface tension of a solar wing, belonging to the field of solar wings. Background Art

[0002] In terms of flexible solar wing deployment devices, most existing flexible solar blankets adopt a scheme of synchronous deployment of the deployment mechanism and the flexible solar array. When the solar wing is deployed, the motor of the deployment mechanism works, and the deployment mechanism extends linearly along the radial direction of the cabin body, driving the synchronous deployment of the solar array until the solar array is fully deployed. This deployment method cannot achieve the controlled deployment of the flexible solar array after the deployment mechanism is fully deployed, and there is a problem that the deployment speed of the flexible solar array cannot be controlled independently.

[0003] In terms of flexible solar wing tensioning devices, China's space flexible solar wings use a scroll spring rope system for tensioning. At the end stage of the deployment of the flexible solar array, the scroll spring rope system continues to move away from the array surface under the extension of the deployment mechanism, pulling the tensioning rope out of the winding wheel. The rotation of the winding wheel drives the deformation of the coil spring to apply force (store energy), which is then converted into the pre-tension of the tensioning rope. The tensioning rope is pulled by the pre-tightening force of the coil spring to achieve the purpose of tensioning the solar blanket. The problems existing in this design are as follows: As the coil spring ages in the space environment, the tension on the tensioning rope deviates from the design, and the tension cannot be adjusted according to needs after being launched, which may lead to insufficient tension in the space surface gravity environment.

[0004] In summary, the current existing flexible solar wing deployment and tensioning mechanism solutions are two relatively independent design solutions and each has certain deficiencies, unable to meet the usage requirements in the space surface gravity environment. The deployment of the flexible solar array depends on the deployment mechanism, the speed cannot be independently regulated, the tension is insufficient, and it is restricted by the strict requirements of the spacecraft for weight and volume. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: The present invention provides a device for controlling the deployment speed and surface tension of a solar wing, and solves the problem of how to achieve the automatic speed-controlled deployment of the solar wing and the tensioning with a specific pre-tension in the fully deployed state under the condition that the deployment mechanism has been fully deployed before the solar wing starts to deploy, and is particularly suitable for the deployment of a reel-type solar wing in a gravity field.

[0006] The technical solution adopted by the present invention is: a solar wing unfolding speed control and surface tensioning device, including a solar blanket central reel, an unfolding end bracket, a driving motor, a pulley conveyor belt mechanism and a fixed end bracket; pulley conveyor belt mechanisms are respectively arranged between the two ends of the unfolding end bracket and the corresponding fixed end bracket, and the driving motor is installed on the fixed end bracket, and the protruding shafts at both ends of the solar blanket central reel are respectively connected to the pulley transmission belt mechanisms on both sides, and a flexible solar wing solar blanket is wound on the central reel of the solar blanket; before the flexible solar wing solar blanket is unfolded, the unfolding end bracket is pushed to unfold in a direction away from the fixed end bracket through an external unfolding mechanism, so that the transmission belt in the pulley transmission belt mechanism is stretched and unfolded, and the driving motor drives the pulley transmission belt mechanism to pull the central reel of the solar blanket from the side close to the fixed end bracket to the side of the unfolding end bracket, so that the flexible solar wing solar blanket on the central reel of the solar blanket is unfolded.

[0007] Furthermore, the unfolding end bracket includes a crossbeam and a support rod, a support rod is respectively arranged at both ends of the crossbeam, and a plurality of guide wheel mounting holes are respectively arranged at both ends of each support rod.

[0008] Furthermore, the pulley conveyor belt mechanism includes a tensioning transmission belt, a first guide wheel, a second guide wheel, a storage wheel, a driving wheel and a speed-controlling transmission belt; storage wheels are respectively installed at both ends of the crossbeam of the unfolding end bracket, and the first guide wheel and the second guide wheel are respectively arranged at both ends of each support rod of the unfolding end bracket, and the storage wheel can rotate; a driving wheel is installed on each fixed end bracket; two circles of wire-receiving grooves are arranged on the side of the driving wheel, respectively for storing the tensioning transmission belt and the speed-controlling transmission belt; a circle of wire-receiving grooves is arranged on the side of the storage wheel, and a circle of wire-receiving grooves is arranged on the side of the storage wheel. A radial through hole a is arranged on the bottom surface of the groove along the diameter of the storage wheel; the tensioning transmission belt passes through the radial through hole a, one end of which is connected to the protruding shaft at the end of the central reel of the solar blanket and guided by the first guide wheel, and the other end of which is bonded to a wire-receiving groove of the driving wheel and guided by the second guide wheel; one end of the speed-controlling transmission belt is bonded to another wire-receiving groove of the driving wheel, and the other end of which is connected to the protruding shaft at the end of the central reel of the solar blanket; in the initial state, the tensioning transmission belt is wound and gathered in the wire-receiving groove of the storage wheel, and the speed-controlling transmission belt is wound and gathered in the driving wheel.

[0009] Furthermore, a keyway is provided on the hub of the driving wheel, and the driving wheel is connected to the driving motor via the keyway.

[0010] Furthermore, threaded holes for compressing and fixing the transmission belt are provided on the protruding shafts on both sides of the central reel of the solar blanket, and the tensioning transmission belt and the speed control transmission belt are compressed and fixed on the protruding shafts at the ends of the central reel of the solar blanket by bolts and pads.

[0011] Furthermore, the pulley conveyor belt mechanism also includes a third guide wheel; the third guide wheel is installed on the fixed end bracket, and the other end of the speed control transmission belt is connected to the central reel of the solar blanket after being guided by the third guide wheel.

[0012] Further, the fixed-end bracket is symmetrically arranged with respect to the symmetry axis a, the symmetry axis a passes through the center point of the cross beam of the deployment-end bracket, and the symmetry axis a is perpendicular to the cross beam.

[0013] Further, the tensioning drive belt and the speed control drive belt are Kevlar fiber belts.

[0014] Further, before the solar blanket is deployed, the deployment-end bracket is pushed by an external deployment mechanism to deploy away from the fixed-end bracket, and the storage pulley releases the tensioning drive belt retracted in its wire winding groove. At this time, the central reel of the solar blanket remains stationary; the drive motor drives the drive wheel to rotate, while releasing the speed control drive belt and retracting the already deployed tensioning drive belt, pulling the central reel of the solar blanket towards the deployment-end bracket, and the central reel of the solar blanket releases the solar blanket to achieve the deployment of the solar blanket.

[0015] Further, after the solar blanket is fully deployed, the drive wheel is continuously driven to rotate, and the central reel of the solar blanket is pulled by the tensioning drive belt to tension the solar blanket.

[0016] The advantages of the present invention compared with the prior art are as follows:

[0017] (1) The present invention can solve the problem of controlling the speed of the solar wing during deployment when the deployment mechanism is in a fully deployed working condition, and can achieve tensioning with a specific pre-tightening force in the fully deployed state, ensuring the tension of the wing surface, and is particularly suitable for the deployment of a rollable solar wing in a gravitational field.

[0018] (2) The present invention solves the technical problems such as the inability to independently control the deployment speed and insufficient tension of the solar cell array when the scroll-type solar wing is applied to the satellite surface working condition. The present invention provides a rope-driven solar wing deployment and tensioning device, which can achieve automatic speed control deployment and tensioning in the fully deployed state of the solar cell array when the deployment mechanism is fully deployed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the unilateral structure of the present invention;

[0020] Figure 2 It is the overall structure of the present invention and is one of the schematic diagrams of the deployment process;

[0021] Figure 3 It is the second schematic diagram of the deployment process of the present invention;

[0022] Figure 4 It is the third schematic diagram of the deployment process of the present invention;

[0023] Figure 5 It is the schematic diagram of the storage state of the storage pulley of the present invention;

[0024] Figure 6 It is the schematic diagram of the release state of the storage pulley of the present invention;

[0025] Figure 7 Schematic diagrams of two states of the drive wheel of the present invention. Specific implementation manner

[0026] The present invention will be described with reference to the accompanying drawings.

[0027] As Figure 1 shown, a solar wing deployment speed control and surface tensioning device includes a solar blanket central reel 1, a tensioning drive belt 2, a deployment end bracket 3, a guide wheel, a tape storage wheel 5, a drive motor 6, a drive wheel 7, a fixed end bracket 8, and a speed control drive belt 9, wherein:

[0028] The deployment end bracket 3 includes a cross beam and support rods. A support rod and a tape storage wheel 5 are respectively arranged at both ends of the cross beam. A first guide wheel 4-1 and a second guide wheel 4-2 are respectively arranged at both ends of each support rod. The tape storage wheel 5 can rotate; the fixed end bracket 8 is symmetrically arranged with respect to the symmetry axis a. The symmetry axis a passes through the center point of the cross beam of the deployment end bracket 3, and the symmetry axis a is perpendicular to the cross beam; a third guide wheel 4-3, a drive wheel 7, and a drive motor 6 are installed on each fixed end bracket 8.

[0029] The tensioning drive belt 2 and the speed control drive belt 9 are Kevlar fiber belts with a certain width; the drive wheel 7 is wheel-shaped. Two circles of wire storage grooves are arranged on the side surface of the drive wheel 7 for storing the tensioning drive belt 2 and the speed control drive belt 9 respectively. A keyway is left on the hub and is connected to the drive motor 6 through the keyway, so that the rotation of the drive wheel 7 can be realized; the guide wheel is wheel-shaped. A wire winding groove is arranged on the side surface of the guide wheel. The tensioning drive belt 2 and the speed control drive belt 9 are wound in the wire winding groove of the guide wheel, which can restrict the transmission directions of the tensioning drive belt 2 and the speed control drive belt 9 and ensure the normal operation of the entire belt drive system; a flexible solar wing solar blanket is wound on the solar blanket central reel 1. Threaded holes for pressing and fixing the drive belt are arranged on the protruding shafts on both sides of the solar blanket central reel 1. The tensioning drive belt 2 and the speed control drive belt 9 are pressed and fixed on the protruding shafts at the end of the solar blanket central reel 1 through bolts and pads, so that the entire rope system forms a complete closed loop; the tape storage wheel 5 is wheel-shaped. A circle of wire storage groove is arranged on the side surface of the tape storage wheel 5, and a radial through hole a is arranged along the diameter of the tape storage wheel 5 at the bottom of the wire storage groove; as Figure 5 、 Figure 6 shown, the tensioning drive belt 2 passes through the radial through hole a, one end is connected to the protruding shaft at the end of the solar blanket central reel 1 and is guided by the first guide wheel 4-1, and the other end is bonded in a wire storage groove of the drive wheel 7 and is guided by the second guide wheel 4-2; one end of the speed control drive belt 9 is bonded in another wire storage groove of the drive wheel 7, and the other end is connected to the protruding shaft at the end of the solar blanket central reel 1 after being guided by the third guide wheel 4-3. As Figure 2As shown, in the initial state, the tensioning transmission belt 2 is wound and gathered in the take-up groove of the storage wheel 5, and the speed control transmission belt 9 is wound and gathered in the driving wheel 7.

[0030] like Figure 3 As shown, in the present invention, the driving wheel 7 and the solar blanket are fixed on the side close to the spacecraft, and the guide wheel and the storage wheel 5 are fixed on the deployment side of the deployment mechanism. Before the solar blanket is deployed, the deployment end bracket 3 is pushed to be deployed away from the fixed end bracket 8 by the external deployment mechanism, and the storage wheel 5 releases the tensioning drive belt 2 gathered in its take-up groove, and at this time, the central reel 1 of the solar blanket does not move; Figure 4 , Figure 7 As shown, the driving motor 6 drives the driving wheel 7 to rotate, releases the speed control transmission belt 9, and retracts the already unfolded tensioning transmission belt 2, pulls the central reel 1 of the solar blanket to move toward the unfolding end bracket 3, and the central reel 1 of the solar blanket releases the solar blanket to realize controlled unfolding of the solar blanket. After the solar blanket is fully unfolded, the driving wheel 7 continues to be driven to rotate, and the central reel 1 of the solar blanket is pulled by the tensioning transmission belt 2 to tension the solar blanket to a certain extent. Note that at this time, if the solar wing is horizontally unfolded upward, the present invention can realize the unfolding of the flexible solar wing by pulling the central reel of the solar blanket to roll by the lower transmission belt bypassing the guide wheel and the storage wheel. If the solar wing is horizontally unfolded downward, the present invention can still pull the central reel of the solar blanket by the upper transmission belt to control the unfolding speed of the flexible solar wing to prevent the solar wing from being damaged by the impact load when the solar wing is about to be fully unfolded.

[0031] Parts of the present invention that are not described in detail belong to the well-known technologies of those skilled in the art.

Claims

1. A solar panel deployment speed control and surface tension device, characterized in that The solar blanket comprises a central reel (1), an unfolding end bracket (3), a driving motor (6), a pulley transmission belt mechanism and a fixed end bracket (8); pulley transmission belt mechanisms are respectively arranged between the two ends of the unfolding end bracket (3) and the corresponding fixed end bracket (8); the driving motor (6) is installed on the fixed end bracket (8); the protruding shafts at the two ends of the central reel (1) of the solar blanket are respectively connected to the pulley transmission belt mechanisms on both sides; and a flexible solar wing solar blanket is wound on the central reel (1) of the solar blanket; before the flexible solar wing solar blanket is unfolded, the unfolding end bracket (3) is pushed to unfold in a direction away from the fixed end bracket (8) by an external unfolding mechanism, so that the transmission belt in the pulley transmission belt mechanism is stretched and unfolded, and the driving motor (6) drives the pulley transmission belt mechanism to pull the central reel (1) of the solar blanket to move from a side close to the fixed end bracket (8) to a side of the unfolding end bracket (3), so that the flexible solar wing solar blanket on the central reel (1) of the solar blanket is unfolded.

2. The sun wing deployment speed control and surface tension device according to claim 1, characterized in that The unfolding end bracket (3) comprises a crossbeam and a support rod, a support rod is respectively arranged at both ends of the crossbeam, and a plurality of guide wheel mounting holes are respectively arranged at both ends of each support rod.

3. The sun wing deployment speed control and surface tension device according to claim 2, characterized in that, The pulley conveyor belt mechanism comprises a tensioning transmission belt (2), a first guide wheel (4-1), a second guide wheel (4-2), a storage wheel (5), a driving wheel (7) and a speed-controlled transmission belt (9); The two ends of the crossbeam of the unfolding end bracket (3) are respectively installed with a storage wheel (5), and the two ends of each support rod of the unfolding end bracket (3) are respectively provided with a first guide wheel (4-1) and a second guide wheel (4-2), and the storage wheel (5) can rotate; each fixed end bracket (8) is provided with a driving wheel (7); two circles of wire collection grooves are provided on the side of the driving wheel (7), respectively used for collecting and storing the tensioning transmission belt (2) and the speed control transmission belt (9); a circle of wire collection grooves is provided on the side of the storage wheel (5), and a radial through hole a is provided on the bottom surface of the wire collection groove along the diameter of the storage wheel (5); the tensioning transmission belt (2) passes through the radial through hole a, one end of which is connected to the protruding shaft at the end of the central reel (1) of the solar blanket and guided by the first guide wheel (4-1), and the other end of which is bonded to a wire-receiving groove of the driving wheel (7) and guided by the second guide wheel (4-2); one end of the speed-controlling transmission belt (9) is bonded to another wire-receiving groove of the driving wheel (7), and the other end of which is connected to the protruding shaft at the end of the central reel (1) of the solar blanket; in the initial state, the tensioning transmission belt (2) is wound and gathered in the wire-receiving groove of the storage wheel (5), and the speed-controlling transmission belt (9) is wound and gathered in the driving wheel (7).

4. A sun wing deployment speed control and surface tension device according to claim 3, characterized in that, A keyway is arranged on the hub of the driving wheel (7), and the driving wheel (7) is connected to the driving motor (6) via the keyway.

5. A sun wing deployment speed control and surface tension device according to claim 4, characterized in that The protruding shafts on both sides of the central reel (1) of the solar blanket are provided with threaded holes for pressing and fixing the transmission belts, and the tensioning transmission belt (2) and the speed control transmission belt (9) are pressed and fixed on the protruding shafts at the ends of the central reel (1) of the solar blanket by bolts and pads.

6. The sun wing deployment speed control and surface tension device according to claim 5, characterized in that, The pulley conveyor mechanism further includes a third guide pulley (4-3); the third guide pulley (4-3) is installed on the fixed-end bracket (8), and the other end of the speed-control conveyor belt (9) is connected to the sun blanket central reel (1) after being guided by the third guide pulley (4-3).

7. A solar panel deployment speed control and surface tension device according to claim 6, characterized in that, The fixed-end bracket (8) is symmetrically arranged with respect to the symmetry axis a, the symmetry axis a passes through the center point of the cross beam of the deployment-end bracket (3), and the symmetry axis a is perpendicular to the cross beam.

8. A sun wing deployment speed control and surface tension device according to claim 7, characterized in that, The tension conveyor belt (2) and the speed-control conveyor belt (9) are Kevlar fiber belts.

9. The sun wing deployment speed control and surface tension device according to claim 8, characterized in that Before the sun blanket is deployed, the deployment-end bracket (3) is pushed by an external deployment mechanism to deploy away from the fixed-end bracket (8), and the storage pulley (5) releases the tension conveyor belt (2) retracted in its wire-receiving groove. At this time, the sun blanket central reel (1) remains stationary; the drive motor (6) drives the drive wheel (7) to rotate, releasing the speed-control conveyor belt (9) while retracting the already deployed tension conveyor belt (2), pulling the sun blanket central reel (1) to move towards the deployment-end bracket (3), and the sun blanket central reel (1) releases the sun blanket to achieve the deployment of the sun blanket.

10. A sun wing deployment speed control and surface tension device according to claim 9, characterized in that, After the sun blanket is fully deployed, continue to drive the drive wheel (7) to rotate, and tension the sun blanket by pulling the sun blanket central reel (1) through the tension conveyor belt (2).

Images