RU2548314C2 - Rotation system of double-wing solar panels - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to orientation (rotation) gear of the solar panels. The rotation system of the solar panels contains casing (1) with covers (2), output shaft in form of two parts (3) and (4) with flanges (5) and (6) to connect with the solar panel wings, and central drive (7). Free from play gear drives (8), (9) connect parts (3) and (4) of the output shaft via the drive (7) shaft. Theses gear drives exclude play and increase torsional rigidity of the output shaft. To exclude play in bearings (10), (11) of supports of the output shaft parts the Bellevible springs (12) are provided. On surface of parts (3, 4) the power current collectors (13), (14) of solar panel wings are installed, and inside the remote current collectors (15), (16) are installed. PCBs (17, 18) of the drive (7) are the output shaft supports (3, 4) ensuring increased bend strength of the structure.

EFFECT: improved power circuit and reduced weight of structure, increased reliability of the rotation system of the solar panels.

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Description

The invention relates to space technology and can be used in the design and use of the rotation system of solar panels (SPSB).

The present invention is intended for the rotation of two wings of solar panels (SB) and the transmission of electricity from solar panels to the spacecraft.

The known system for turning solar panels, US patent 4076191, consisting of a housing, a shaft with two flanges for joining two wings of solar panels, a drive, a current collector. Power collectors transmitting electrical energy, and telemetry transmitting commands and telemetry information, are located on the shaft, while the drive rotates both wings of the SB. This invention is taken as a prototype.

The disadvantage of this device is the massive shaft design, due to the necessary bending stiffness. In addition, the large diameter of the shaft leads to increased friction and wear of the contacts of the current collector and a small life of the SPSB.

The objective of the invention is to increase the reliability of the system, reducing the weight of the structure and increasing functionality.

The problem is achieved in that in the rotation system of two-winged solar panels, comprising a housing, an output shaft with flanges for attaching the wings of the solar cells, a drive for their synchronous rotation, power and telemetric current-collecting devices, the output shaft is made of two parts rigidly connected to each other by gearless gears reverse gears. The drive with the shaft is located in the center, and its body is a support for each part of the shaft, while the telemetric current collection devices are made in the form of two blocks located inside each part of the shaft, respectively.

The essence of the invention is illustrated in the drawing, where figure 1 shows a General view of the claimed device.

The orientation system of the solar battery consists of a housing 1, covers 2, an output shaft, consisting of two parts 3 and 4, on which flanges 5 and 6 are fixed for docking with the SB. A drive 7 is installed in the center of the device, which is connected to both parts of the output shaft by means of gears 8, 9. Two parts of the output shaft 3, 4 are rigidly connected to each other by the same backlashless gears 8, 9 with reverse gear ratios. Backlash-free gears with the help of backlash wheels 20, 21 exclude backlash by torsion of the output shaft within the limits of working loads. To eliminate radial play in the bearings 10, 11 of the bearings of each part of the output shaft, disk springs 12 are installed on the shaft, which select the play by creating an axial load on these bearings. Since the working bending moments acting on the output shaft of the rotary device are small (not more than 1 kgf · m), the axial load does not reduce the performance of bearings 10, 11.

On each part of the output shaft 3, 4 installed power collector devices 13, 14, transmitting electricity from each wing of the SB. Each collector is made on the basis of a bearing with flexible conductive rings instead of balls. The rolling-type current collection device is selected from the condition of ensuring minimum friction, and therefore, the maximum resource of the device. The resource of the current collection device of this design is practically unlimited. Telemetric current-collecting devices 15, 16 are installed inside each part of the output shaft. Drive boards 17, 18 are the shaft supports of the device. The shaft 19 of the actuator 7 is connected with both parts of the output shaft 3, 4.

The device operates as follows.

When a signal is supplied to the drive 7, its shaft 19 begins to rotate and transmits rotation synchronously to both parts of the output shaft 3, 4.

The backlash wheels 20, 21 provide a rigid connection within the working torques of the two parts of the output shaft 3, 4 with each other and with the drive 7, i.e. both parts of the output shaft 3, 4 for torsion work as a solid shaft.

Power collector devices 13, 14 transmit electricity from rotating panels SB to the housing 1 of the device.

Telemetric current-collecting devices 15, 16 transmit telemetric information and control signals from the rotating panels of the SB to the stationary case 1 of the device.

Belleville springs 12 select the play in the bearings 10, 11 of the output shaft, in addition, they compensate for temperature deformations of the housing 1 of the device.

The bending loads falling on the output shaft from the SB perceive parts of the output shaft 3, 4, drive boards 17, 18, and cylindrical body 1. By reducing the length of the parts of the output shaft and transferring bending loads to the device’s case with a significantly larger diameter, the total rigidity of the device is much greater than the prototype.

The output shaft, which receives the loads coming from the SB, has a lower mass than the prototype, because It has no diameter restrictions on the side of the collector devices and is therefore made optimal in terms of mass-stiffness characteristics. The mass costs for the axial dimensions of the rotation system of solar batteries are also reduced due to the placement of telemetric current-collecting devices 15, 16 inside the parts of the output shaft 3, 4.

Weight reduction is also achieved by using drive boards located in the center of the structure as one of the supports of the output shaft.

Thus, the use of a split shaft in SPSB made it possible to reduce the mass and dimensions of the device, increase its life, and increase the stiffness of the SPSB.

At present, the enterprise has issued design documentation for the SPSB of the claimed design and tested it. Tests showed a significant decrease in the mass of the system, an increase in the resource of work, and an increase in the stiffness characteristics of the system.

Claims (1)

A rotary system for two-winged solar cells, comprising a housing, an output shaft with flanges for attaching the wings of the solar cells, a drive for their synchronous rotation, power and telemetric current-collecting devices, characterized in that its output shaft is made of two parts, rigidly interconnected by backlashless gears with reverse gear ratios, the drive with its shaft is located in the center, and its housing is a support for each part of the shaft, while telemetric current collection devices are made in the form of two x blocks placed inside each part of the shaft, respectively.