JP2010205764A - Tracking type photovoltaic power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tracking type photovoltaic power generation device which eliminates the need to provide a motor for changing an angle of inclination for every solar cell panel, and which is reducible in manufacturing costs or the like. <P>SOLUTION: The tracking type photovoltaic power generation device includes: a plurality of rotating shafts 1a which are arranged extending in the north-south direction, and which each having a shaft body 9 and a panel support part 10; a plurality of solar cell panels 2 which are provided on the rotating shafts 1a; driving means which are provided at the ends of the respective rotating shafts 1a, and which provide driving forces to make the solar cell panels 2 track the sun along the azimuth angle of the sun or to change the angle of inclination of the solar cell panels 2 in accordance with the celestial declination of the sun; and shafts for change in angle of inclination 14 which movably penetrate shaft bodies 9 in an axial direction. Then, the angle of inclination is changed by movement in an axial direction of the shafts for change in angle of inclination 14 through driving of the driving means, and the azimuth angle is changed by rotation of the rotating shafts 1a through driving of the driving means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tracking type solar power generation apparatus in which a light receiving surface of a solar cell panel tracks along the azimuth angle of the sun and the inclination angle of the sun is changed.

In order to deal with environmental problems such as an increase in CO ₂ and resource problems, tracking solar power generation devices that use solar energy have been actively developed.
A part of the energy required by using the rooftop and roof of the building to obtain electric power is used as an auxiliary, but in order to obtain more power generation, a large-scale site is set up and the tracking type is used. The construction of solar power generation equipment has also started to supply power-level energy.

The sun moves 180 ° from sunrise to sunset, and its altitude (declination) changes depending on the season.
In this case, the solar cell panel (hereinafter abbreviated as “panel”) has a constant inclination angle with respect to the ground surface throughout the year, so that the direction of sunlight according to the daytime and season varies. Power generation efficiency is poor.
In order to eliminate such inconvenience, the tracking solar power generation apparatus with a solar tracking function has an azimuth axis that drives the light receiving surface of the panel to track along the azimuth from sunrise to sunset, A so-called single-axis tracking type solar photovoltaic power generation apparatus, and a so-called two-axis tracking type system having an inclination angle axis that is driven to change an inclination angle with respect to declination that changes according to the four seasons in combination with the azimuth angle axis, It has been known.
In these tracking solar power generation devices, a large amount of power generation can be obtained by increasing the panel area, but increasing the panel size is restricted in terms of strength and cost. From, it consists of a plurality of panels.

For example, the tracking type solar power generation apparatus described in Patent Document 1 below is the above-described single-axis tracking method, and an electric jack as a driving source is linearly driven on the back side of the panel, and the panel is rotated around the axis. It is something to be made.
In the case of this solar power generation device, the number of panels increases as the power generation scale increases, and accordingly, a drive source for driving each panel must be attached to the back side of the panel, which increases the cost. There was a point.

  On the other hand, the tracking type solar power generation device described in the following Patent Document 2 connects each panel with a rotation shaft and moves the rotation shaft with one drive source to reduce the cost. Is.

JP 2007-258357 A US Patent Application Publication No. 2004/0238025

  In the case of the tracking type solar power generation device, it is a uniaxial tracking method, and when the tracking type solar power generation device is provided with a mechanism that follows declination that changes according to the four seasons, the tilt angle axis With respect to the above, there is a problem that the manufacturing cost increases because it has to be installed for each panel.

  An object of the present invention is to solve the above-described problems, and it is not necessary to provide a motor for changing the inclination angle for each solar cell panel, and the manufacturing cost can be reduced. It aims at obtaining tracking type solar power generation devices.

  The tracking solar power generation device according to the present invention is arranged to extend in the north-south direction or the east-west direction, and includes a shaft body and a plurality of rotating shafts having a panel support portion that is integral with the shaft body and extends from the shaft body in the axial direction. A plurality of solar cell panels provided at intervals on the rotation axis, and provided at an end of each of the rotation axes, to track the solar cell panel along the azimuth of sunset from the sunrise of the sun, or Driving means for providing a driving force for changing the inclination angle of the solar cell panel according to the declination of the sun, a changing shaft penetrating the shaft main body so as to be movable in the axial direction, and one end portion being freely rotatable to the solar cell panel And a first lever whose other end is rotatably connected to the panel support, and one end is rotatably connected to the solar cell panel and the other end is for the change. On the axis A second lever connected in a freely rotatable manner, and one of the azimuth angle and the tilt angle is changed by the movement of the changing shaft in the axial direction by driving the driving means, and the driving means drives the driving means. The other of the azimuth angle and the tilt angle is changed by the rotation of the rotation shaft.

  In addition, the tracking solar power generation device according to the present invention includes a plurality of moving shafts arranged to extend in the north-south direction or the east-west direction, and a plurality of solar cells provided on the moving shafts at intervals through a frame. A panel, a rotation axis arranged in parallel with the movement axis, and provided at the movement axis and an end of the rotation axis, to track the solar cell panel from the sun sunrise to the sunset azimuth, or Driving means for providing a driving force for changing the inclination angle of the solar cell panel according to the declination of the sun, and a rotation support portion formed protruding from the frame are slidably fitted in the circumferential direction, and the frame and the sun Provided between the bearing supporting the battery panel, the rotation transmitting portion formed coaxially with the rotation supporting portion on the frame and the rotating shaft, and transmitting the rotational force of the rotating shaft to the rotation transmitting portion. You And a rotating lever having one end portion rotatably provided on the solar cell panel and the other end portion engaged with the moving shaft, the moving shaft including the rotation support portion and the The rotation transmitting portion penetrates the rotation transmitting portion so as to be movable in the axial direction. One of the corners is changed, and the other of the azimuth angle or the tilt angle is changed by the seesaw rotation around the rotation transmission portion of the frame interlocked with the rotation of the rotation shaft driven by the driving means. .

According to the tracking solar power generation apparatus according to the present invention, for example, the inclination angle of the plurality of solar battery panels is changed at a time by the movement in the axial direction of the changing shaft by driving of one driving means. Is reduced.
In addition, for example, the rotation angle of the rotating shaft by driving one driving means changes the tilt angles of the plurality of solar cell panels at a time, so that the manufacturing cost is reduced.

It is a perspective view which shows the tracking type solar power generation device of Embodiment 1 of this invention. It is a principal part perspective view of FIG. It is the figure before rotation of the rotating shaft of the tracking type solar power generation device of FIG. It is the figure after rotation of the rotating shaft of the tracking type solar power generation device of FIG. It is a figure before the movement of the axis | shaft for inclination angle change of the tracking type solar power generation device of FIG. It is the figure after the movement of the axis | shaft for inclination angle change of the tracking type solar power generation device of FIG. It is a principal part perspective view which shows the modification of the tracking type solar power generation device of Embodiment 1. FIG. It is a perspective view which shows the tracking type solar power generation device of Embodiment 2 of this invention. It is a principal part perspective view of the tracking type solar power generation device of FIG. It is a principal part disassembled perspective view of the tracking type solar power generation device of FIG. It is principal part sectional drawing of the tracking type solar power generation device of FIG. It is a figure before the movement of the axial direction of the movement axis of FIG. It is a figure after the movement of the axial direction of the movement axis of FIG. It is a figure before rotation of the rotating shaft of FIG. It is a figure after rotation of the rotating shaft of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram showing a two-axis tracking solar photovoltaic power generator according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of a main part of the tracking solar photovoltaic power generator of FIG.
In this tracking type solar power generation device, a plurality of rotating shafts 1a, 1b, 1c,... Are arranged extending in the north-south direction and equally spaced in the east-west direction. Each of the rotary shafts 1a, 1b, 1c,... Is provided with a rectangular solar cell panel (hereinafter abbreviated as a panel) 2 at equal intervals. At one end of each of the rotating shafts 1a, 1b, 1c,..., Driving means 3 that is a driving source for rotating the panel 2 along the azimuth angle and the inclination angle is provided.

The rotary shafts 1a, 1b, 1c,... Are rotatably supported by bearings 5 at the heads of the inverted V-shaped base 4 arranged at equal intervals.
Each of the rotary shafts 1a, 1b, 1c,... Has a shaft main body 9 inserted into the bearing 5, and a panel support portion 10 that is integral with the shaft main body 9 and extends in the axial direction from the shaft main body 9. The support portion 10 is formed between the shaft main bodies 9. A first lever 11 is provided between the panel support 10 and a bearing 7 provided on the back side of the panel 2. One end of the first lever 11 is supported by the panel support 10 so as to be rotatable at the first fulcrum 12, and the other end is supported by the bearing 7 so as to be rotatable at the second fulcrum 13.

Further, an inclination angle changing shaft 14 that rotates in synchronization with the rotation shafts 1a, 1b, 1c,... Is provided along with the rotation shafts 1a, 1b, 1c,. The inclination angle changing shaft 14 is movable in the axial direction with respect to the angular shaft main body 9 and penetrates in parallel with the panel support portion 10. A second lever 15 is provided between the tilt angle changing shaft 14 and the bearing 7. One end of the second lever 15 is rotatably supported by a tilt angle changing shaft 14 at a third fulcrum 16, and the other end is rotatable at a second fulcrum 13 common to the first lever 11. Are supported by the bearing 7.
The drive means 3 is connected to a rotation motor (not shown) that rotates the rotation shafts 1a, 1b, 1c,... And the inclination angle changing shaft 14 in synchronization with the inclination angle changing shaft 14, and is used for changing the inclination angle. A moving motor (not shown) for moving the shaft 14 in the axial direction is housed in each case.

In the tracking type solar power generation apparatus having the above-described configuration, the rotary shafts 1a, 1b, 1c,... And the tilt angle changing shaft 14 are rotated by driving the rotary motors of the drive means 3, and the panel 2 is shown in FIG. By changing the direction of the light receiving surface as shown in FIG. 4, tracking is performed along the azimuth angle from sunrise to sunset of the sun.
In addition, the tilt angle changing shaft 14 is moved in the axial direction by the driving of the moving motor of each driving means 3, and along with this movement, the first lever 11 rotates around the first fulcrum 12, The second lever 15 rotates around the second fulcrum 13 and the distance between the first fulcrum 12 and the third fulcrum 16 increases. As a result, as shown in FIG. 5 to FIG. 6, the panel 2 can change the inclination angle with respect to the north-south direction and can track the change of declination that changes according to the four seasons.

According to the tracking solar power generation apparatus of this embodiment, the plurality of panels 2 are attached to the inclination angle changing shaft 14, and the plurality of panels 2 are attached to the end of the inclination angle changing shaft 14. The inclination angle is simultaneously changed by driving one moving motor of the connected driving means 3.
Therefore, compared with the case where each panel 2 is provided with a motor for changing the inclination angle, the manufacturing cost is greatly reduced and the maintenance is reduced, and the inclination angle is changed at the same time. The angle of inclination is changed quickly.

Further, the tilt angle changing shaft 14 provided along with the rotating shafts 1a, 1b, 1c,... Penetrates the shaft body 9 of the rotating shafts 1a, 1b, 1c,. The axis 1c... And the axis 14 of the tilt angle changing shaft 14 are close to each other.
Therefore, the rotating shafts 1a, 1b, 1c,... That rotate with the tilt angle changing shaft 14 can be rotated with a small rotational torque, are not easily deformed by twisting, and can be used for a long time.
In addition, there is an effect that the radial space is reduced.

As shown in FIG. 7, a drive motor 6 is provided on the back surface of the panel 2, and the panel is centered on the normal line of the light receiving surface of the panel 2 (line extending in the vertical direction from the center line) by driving the drive motor 6. 2 may be rotated.
By driving the drive motor 6, the position of the shadow generated by the panel 2 on the adjacent panel 2 can be controlled. Even if the shadow reaches the adjacent panel 2, the power generation capacity is as low as possible. The shadow can be controlled.

In the above-described embodiment, the tracking type solar power generation apparatus in which the rotation shafts 1a, 1b, 1c,... And the inclination angle changing shaft 14 extend in the north-south direction has been described, but the rotation shafts 1a, 1b, 1c,. .. And the inclination angle changing shaft 14 may extend in the east-west direction.
In this case, the tilt angle is changed by the rotation of the rotation shafts 1a, 1b, 1c,..., And the azimuth angle is changed by moving the tilt angle changing shaft 14 in the axial direction.

Embodiment 2. FIG.
8 is an overall configuration diagram showing a tracking type solar power generation device of the biaxial system according to Embodiment 2 of the present invention, FIG. 9 is a perspective view of a main part of the tracking type solar power generation device of FIG. 8, and FIG. FIG. 11 is an essential part sectional view of the tracking type solar power generation device of FIG. 8, and FIG.
In this tracking solar photovoltaic power generation apparatus, a plurality of moving shafts 21a, 21b, 21c,..., And rotating shafts 36a, 36b, 36c,. Yes. Each of the moving shafts 21a, 21b, 1c,... Is provided with a rectangular solar cell panel (hereinafter abbreviated as a panel) 2 at equal intervals. Drive for tracking the panel 2 along the azimuth and tracking along the inclination angle at one end of each of the moving shafts 21a, 21b, 21c,... And the rotation shafts 36a, 36b, 36c,. A driving means 22 as a source is provided.

A plurality of inverted U-shaped support legs 23 are arranged on the moving shafts 21a, 21b, 21c,... And the rotation shafts 36a, 36b, 36c,.
A cylindrical bearing 35 that supports the frame 24 and the panel 2 is provided on the upper portion of the support leg 23.
The frame 24 is opposed to the pair of first frame portions 25 provided opposite to each other, the second frame portion 26 connecting the first frame portions 25, and the respective first frame portions 25. And a fixed triangular support plate 27.
The back surface of the panel 2 is rotatably provided on the top of the support plate 27, and the panel 2 is supported by the pair of support plates 27 so as to be rotatable along an azimuth angle.

A rotation support portion 29 that protrudes from the center of the second frame portion 26 to one side in the axial direction is fitted into the bearing 35 so as to be slidable in the circumferential direction. On the other side in the axial direction from the center of the second frame portion 26, a rotation transmission portion 30 that protrudes coaxially with the rotation support portion 29 is formed.
Each of the movement shafts 21a, 21b, 21c,... Penetrates along the central axis of the rotation support portion 29 and the rotation transmission portion 30 so as to be movable. Each of the moving shafts 21a, 21b, 21c,... Is formed with a plurality of pins 31 protruding in the vertical direction at the same interval as each panel 2. The ends of the moving shafts 21a, 21b, 21c,... Are connected to a moving motor (not shown) constituting the driving means 22.
At the center of each panel 2, a rotation lever 32 that is rotatable about a fulcrum 34 is provided. The rotating lever 32 is formed with a slit 33 extending partway from the tip. The pin 31 is loosely inserted into and engaged with the slit 33, and the pin 31 slides along the slit 33 as the moving shafts 21a, 21b, 21c,. The lever 32 rotates around the fulcrum 34.

Rotating shafts 36a, 36b, 36c,... Are provided in parallel with the moving shafts 21a, 21b, 21c,. The ends of the rotary shafts 36a, 36b, 36c,... Are connected to a rotary motor (not shown) constituting the drive means 22.
The rotational force of the rotation shafts 36a, 36b, 36c,... Is transmitted to the rotation transmission unit 30 between the rotation shafts 36a, 36b, 36c,. A belt 37 as a transmission means is wound around. The rotational force from the rotary motor is rotated by the rotation shafts 36a, 36b, 36c,..., And the rotation transmission unit 30 via the belt 37, and the panel 2 rotates in a seesaw manner around the rotation transmission unit 30.
The seesaw rotation of the panel 2 is caused by the movement shafts 21a, 21b, 21c,... Penetrating along the central axis of the rotation transmitting portion 30, so that the movement shafts 21a, 21b, 21c,. It is also a seesaw rotation.

In the tracking type solar power generation apparatus having the above configuration, each of the moving shafts 21a, 21b, 21c,... Moves in the axial direction by driving of the moving motor of each driving means 22. As the moving shafts 21a, 21b, 21c,... Move, the pin 31 moves along the slit 33 formed in the rotating lever 32, and the rotating lever 32 rotates around the fulcrum 34. .
As a result, the panel 2 changes the direction of the light receiving surface as shown in FIGS. 12 to 13 and tracks along the azimuth angle from the sunrise of the sun to the sunset. The moving motor is driven at a predetermined time interval.

Further, the rotation shafts 36 a, 36 b, 36 c,... Are rotated by the driving of the rotary motors of the respective driving means 3, and the belt 37 travels along with this rotation, and the rotation transmitting portion formed in the second frame portion 26. As the rotation transmission unit 30 rotates, the panel 2 rotates the seesaw around the rotation transmission unit 30.
As a result, as shown in FIGS. 14 to 15, the panel 2 changes the inclination angle of the light receiving surface with respect to the north-south direction, and tracks the change along the declination that changes according to the four seasons.

According to the tracking type solar power generation apparatus of this embodiment, the plurality of panels 2 are driven by one rotary motor of the driving means 22 connected to the end portions of the rotary shafts 36a, 36b, 36c,. Thus, the inclination angle is changed simultaneously.
Therefore, compared with the case where each panel 2 is provided with a motor for changing the inclination angle, the manufacturing cost is greatly reduced and the maintenance is reduced, and the inclination angle change is changed at the same time and the inclination is changed. The corner is changed quickly.

Further, the moving shafts 21a, 21b, 21c,... For changing the azimuth angle of the panel 2 penetrate through the central axes of the rotation support portion 29 and the rotation transmission portion 30 which are the centers of rotation of the seesaw of the panel 2. Yes.
Therefore, the frame 24 supporting the panel 2 is hardly deformed by twisting and can be used for a long period of time.

In the above embodiment, the tracking type solar power generation apparatus in which the moving shafts 21a, 21b, 21c,... And the rotating shafts 36a, 36b, 36c,. , 21c,..., And the rotation shafts 36a, 36b, 36c,.
In this case, the tilt angle is changed by moving the moving shafts 21a, 21b, 21c,... In the axial direction, and the azimuth angle is changed by rotating the rotating shafts 36a, 36b, 36c,.
Further, although the belt 37 is used as the transmission means, it is of course not limited to this, and for example, a gear may be used.

  1a, 1b, 1c Rotating shaft, 2 Solar panel, 3,22 Driving means, 4 Base, 5,35 Bearing, 6 Driving motor, 7 Bearing, 9 Shaft body, 10 Panel support, 11 First bar, 12 1st fulcrum, 13 2nd fulcrum, 14 Inclination angle changing shaft, 15 2nd lever, 16 3rd fulcrum, 21 Moving shaft, 23 Support leg, 24 frame, 25 1st frame part, 26 1st 2 frame part, 27 support plate, 29 rotation support part, 30 rotation transmission part, 31 pin, 32 rotation lever, 33 slit, 34 fulcrum, 37 belt (transmission means).

Claims (4)

A plurality of rotating shafts that extend in the north-south direction or the east-west direction, and have a shaft main body and a panel support unit that is integral with the shaft main body and extends in the axial direction from the shaft main body;
A plurality of solar cell panels provided at intervals on the rotating shaft;
Provided at the end of each of the rotating shafts to provide a driving force for tracking the solar cell panel along the azimuth of sunset from the sunrise of the sun or changing the tilt angle of the solar cell panel according to the declination of the sun Driving means;
A changing shaft penetrating the shaft body so as to be movable in the axial direction;
A first lever having one end rotatably connected to the solar cell panel and the other end rotatably connected to the panel support;
A second lever having one end rotatably connected to the solar cell panel and the other end rotatably connected to the change shaft;
One of the azimuth angle and the inclination angle is changed by movement of the changing shaft in the axial direction by driving of the driving means,
The tracking type solar power generation apparatus, wherein the other of the azimuth angle and the inclination angle is changed by rotation of the rotating shaft by driving of the driving means.   The tracking type solar power generation apparatus according to claim 1, wherein the rectangular solar cell panel is provided with a drive motor that rotates about a normal to the light receiving surface of the solar cell panel. A plurality of movement axes arranged extending in the north-south direction or the east-west direction;
A plurality of solar battery panels provided on the moving shaft at intervals through a frame;
A rotating shaft arranged in parallel with the moving shaft;
Driving force that is provided at the end of the moving shaft and the rotating shaft and that tracks the solar cell panel along the azimuth angle of sunset from the sunrise of the sun or changes the inclination angle of the solar cell panel by the declination of the sun Driving means for providing,
A rotation support portion formed protruding from the frame is slidably inserted in the circumferential direction, and a bearing that supports the frame and the solar cell panel,
A transmission means provided between a rotation transmission portion formed on the frame so as to protrude coaxially with the rotation support portion and the rotation shaft, and transmitting a rotational force of the rotation shaft to the rotation transmission portion;
The solar cell panel is provided with a rotation lever having one end rotatably provided and the other end engaged with the moving shaft,
The moving shaft passes through the rotation support portion and the rotation transmission portion so as to be movable in the axial direction,
One of the azimuth angle and the inclination angle is changed by turning the turning lever in conjunction with the movement of the front moving shaft in the axial direction by driving the driving means,
A tracking type characterized in that the other of the azimuth angle or the inclination angle is changed by a seesaw rotation around the rotation transmission portion of the frame interlocked with the rotation of the rotation shaft driven by the driving means. Solar power generator.   4. The tracking solar power generation apparatus according to claim 3, wherein the moving shaft, the bearing, the rotation support portion, and the rotation transmission portion have the same center axis.

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