JP2007258357A - Tracking type photovoltaic power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tracking type photovoltaic power generation device in which burden of drive control of a sunlight tracking mechanism is lessened while reducing the size and weight of the device. <P>SOLUTION: Backside of a solar cell array 3 is pivoted by a shaft 8 of a single shaft supporting portion 2, spindle 11 of an electric jack 4 is coupled to the backside of the solar cell array 3, linear driving of the spindle 11 is performed by the electric jack 4, and the solar cell array 3 is rotary driven around the shaft 8. As compared with a hydraulic jack, the electric jack 4 can not only exhibit a sufficient driving force but also facilitate drive control. Even in such a situation as a wind pressure load is applied to the solar cell array 3, drive control of the electric jack is not complicated and stabilized driving is ensured. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tracking solar power generation apparatus that rotates and moves a solar cell array so as to follow the diurnal motion of the sun.

  As is well known, since a photovoltaic power generation apparatus is normally expected to be used for electric power, the apparatus becomes large.

  Moreover, in order to improve the utilization efficiency of sunlight, a solar power generation apparatus having a solar tracking function of generating power by the solar cell array while always directing the light receiving surface of the solar cell array in the direction of the sun has been put into practical use. However, since this type of device rotates and moves the solar cell array, the size and weight of the entire device increase, and the installation location is also limited.

  Such devices with a solar tracking function include a biaxial tracking method in which the light receiving surface of the solar cell array is always directed in a direction orthogonal to sunlight and a uniaxial tracking method in which the light receiving surface is directed in the direction of solar radiation from the sun. is there.

For example, Patent Document 1 proposes a uniaxial tracking type solar power generation apparatus. Here, the solar panel (solar cell array) is supported so as to be rotatable about one axis, and the solar panel is rotated about one axis by using two hydraulic jacks.
Utility Model Registration No. 3070637

  By the way, in a device with a solar tracking function, not only the size and weight of the entire device are extremely increased, but also the solar cell array needs to be rotated and moved while withstanding the wind pressure load applied to the solar cell array.

  However, when each hydraulic jack is operated while supporting two locations of the solar cell array with the respective hydraulic jacks as in Patent Document 1, it is necessary to perform drive control with matching of each hydraulic jack. Since a wind pressure load or the like is applied to the solar cell array, the drive control of each hydraulic jack is complicated, and stable driving is difficult.

  In addition, when a hydraulic jack is used, complicated maintenance of machinery such as hydraulic piping and a pump is required. Furthermore, since the maintenance cycle is short and large-scale inspection and maintenance are required, there is a problem that the operating rate of the apparatus is lowered.

  Accordingly, the present invention has been made in view of the above-described conventional problems, and tracking type sunlight that can reduce the load of driving control of the solar tracking mechanism and can reduce the size and weight of the device. An object is to provide a power generator.

  In order to solve the above-described problems, the present invention provides a uniaxial support portion that pivotally supports the back side of a solar cell array with a single axis and rotatably supports the solar cell array around the single axis, and a single axis of the uniaxial support portion. And an electric jack having a spindle connected to the back side of the solar cell array at a position spaced in a direction perpendicular to the solar cell array, linearly driving the spindle by the electric jack, and the spindle to the back side of the solar cell array The solar cell array is rotationally driven around the one axis by pushing and pulling.

  Moreover, the said electric jack is single.

  Furthermore, the support | pillar which supports the back side of the said solar cell array via the said uniaxial support part is provided, and the said electric jack is attached to the said support | pillar.

  Further, the spindle of the electric jack swings on the back side of the column.

  According to such a tracking type photovoltaic power generation apparatus of the present invention, the back side of the solar cell array is pivotally supported by one axis, the spindle of the electric jack is connected to the back side of the solar cell array, and the spindle is linearly driven by the electric jack. Then, the back side of the solar cell array is pushed and pulled by the spindle, and the solar cell array is rotationally driven around one axis. This electric jack not only has a sufficient driving force as compared with a hydraulic jack, but also can easily control the driving thereof. Moreover, even if the wind pressure load or the like is applied to the solar cell array, the drive control of the electric jack is not complicated, and stable drive is possible. Furthermore, there is no need for complicated maintenance of machinery such as hydraulic pipes and pumps like a hydraulic jack, maintenance is easy, maintenance intervals are not short, and long-term maintenance-free operation can be achieved. Therefore, it is possible to improve the operating rate of the apparatus.

  In particular, when a single electric jack is used, drive control becomes extremely simple.

  Moreover, since the solar cell array is supported by the support columns, the solar cell array is separated from the ground, and the degree of freedom of the installation location is increased.

  Furthermore, the spindle of the electric jack is swung on the back side of the column to prevent the spindle from interfering with the column.

  That is, according to the tracking type solar power generation device of the present invention, the adoption of the electric jack stabilizes the driving of the solar cell array and facilitates the control. In addition, maintenance is easy and long-term maintenance-free is achieved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view showing an embodiment of the tracking solar power generation apparatus of the present invention. The tracking solar power generation apparatus according to the present embodiment is supported by a column 1 protruding from the ground, a uniaxial support 2 provided at the upper end of the column 1, and a uniaxial support 2 so as to be rotatable around a single axis. The solar cell array 3 and an electric jack 4 that rotationally drives the solar cell array 3 are provided.

  The support column 1 is supported by digging a hole in the ground, putting the lower end of the support column 1 into the hole, pouring concrete into the hole, and hardening it.

  As shown in FIGS. 1, 2, and 3, the uniaxial support portion 2 fixes the inclined plate 5 to the upper end of the support column 1, and fixes the shaft holding portions 6 to both ends of the inclined plate 5. Both ends of one shaft 8 are fixedly supported by the holding portion 6, and a pair of bearing portions 7 are fixed to the back surface of the solar cell array 3, and the shaft 8 is rotatably supported by each bearing portion 7. The solar cell array 3 is supported so as to be rotatable about the axis 8. A cylindrical oilless bush is inserted between the inner periphery of each bearing portion 7 and the outer periphery of the shaft 8, and an oilless washer is inserted between each bearing portion 6 and each bearing portion 7, whereby each bearing around the shaft 8 is inserted. The part 7 and the solar cell array 3 can be smoothly rotated.

  In addition, the shaft 8 of the uniaxial support portion 2 is located along the center line of the solar cell array 3, and each bearing portion 7 is arranged at an equal distance from the center of the solar cell array 3. The interval is set to about 560 mm. Thereby, the solar cell array 3 will be supported by the gravity center, and the solar cell array 3 will be supported with a favorable balance.

  Further, the shaft 8 of the uniaxial support 2 is inclined and supported at an elevation angle of 23 degrees so as to be lowered in the south direction, and the shaft 8 is directed in the north-south direction. For this reason, by rotating the solar cell array 3 around the axis 8, the light-receiving surface on the front side of the solar cell array 3 can be sequentially directed from the east direction to the south direction to the west direction. The light-receiving surface can be always directed in the direction of the sun by following the diurnal motion of the sun.

  When viewed in plan, the solar cell array 3 has a geometric shape as shown in FIG. The solar cell array 3 comprises 12 rectangular solar cell modules 3a and 20 triangular solar cell modules 3b combined on a panel frame 9, and each solar cell module 3a, 3b is connected to the panel frame by bolts and nuts. 9 and the length of each length is about 7850 mm × 7230 mm. At this size, land transportation is difficult, so the solar cell array 3 is divided into three blocks 3B1, 3B2, 3B3, etc., so that the width of each block can be reduced to the land transportation limit of 2500 mm or less. In the state divided into the blocks 3B1 to 3B3, land transportation is performed, the blocks 3B1 to 3B3 are assembled at the installation site of the solar cell array 3, and the electrical connection is performed to complete the solar cell array 3.

  At the joints of the blocks 3B1 to 3B3, as shown in FIG. 2, the ends of the blocks are connected and fixed to each other with bolts and nuts, and the reinforcing member 10 is bridged between the blocks and fixed with screws. Thus, the blocks are connected. Most of the reinforcing member 10 is hidden between the solar cell modules, and the appearance of the solar cell array 3 is prevented from deteriorating.

  The electric jack 4 has a spindle 11 and is attached to the column 1. The tip of the spindle 11 is connected to the back surface of the solar cell array 3 at a position spaced about 860 mm from the shaft 8 in a direction orthogonal to the shaft 8 of the uniaxial support portion 2. The electric jack 4 can linearly drive the spindle 11 to feed the spindle 11 to the solar cell array 3 side or pull it in reverse, and the solar cell array 3 is attached to the shaft 8 as shown in FIG. Rotate around. Therefore, the rotation angle range of the solar cell array 3 is determined by the linear movement amount of the spindle 11.

  Further, as shown in FIG. 5, the electric jack 4 and the spindle 11 are arranged so that the spindle 11 is parallel to the solar cell array 3 when the spindle 11 is sent out to the solar cell array 3 side longest and pulled most. The solar cell array 3 is positioned and rotated about 120 degrees from the longest feeding to the most pulling. That is, the rotation angle range of the solar cell array 3 is set to about 120 degrees.

  Further, the horizontal movement amount of the lower end of the spindle 11 is suppressed to about 430 mm so that the spindle 11 does not hinder the effective use of the lower space of the solar cell array 3. Further, the spindle 11 moves at a position away from the back surface of the column 1 and does not interfere with the column 1.

  6 and 7 are an enlarged side view and a rear view of the periphery of the electric jack 4. A spherical body 11 a is provided at the tip of the spindle 11 of the electric jack 4, and a joint member 12 is fixed at a position on the back surface of the solar cell array 3 to which the tip of the spindle 11 is connected, and the spherical body 11 a at the tip of the spindle 11 is the joint. The spherical recess 12a of the member 12 is fitted, whereby the spindle 11 is connected to the solar cell array 3 so as to be rotatable.

  The main body 4 a of the electric jack 4 is provided with two bearing portions 15, and the support column 1 is provided with two shaft holding portions 16, and the two pins 17 are parallel to the shaft 8 of the uniaxial support portion 2. Each of the bearing portions 15 and the shaft holding portion 16 are penetrated, whereby the main body 4a of the electric jack 4 is supported so as to be rotatable in the same direction as the solar cell array 3.

  The electric jack 4 is positioned and fixed to the column 1 so that the spindle 11 is perpendicular to the axis 8 of the uniaxial support 2 when viewed from the side. Since the solar cell array 3, the shaft 8 of the uniaxial support portion 2, and the pins 17 that support the main body 4 a of the electric jack 4 are parallel to each other, the spindle 11 is exposed to the sun when rotating around the axis 8 of the solar cell array 3. It is always perpendicular to the back surface of the battery array 3. As a result, the length of the spindle 11 fed to the solar cell array 3 side is always maintained at the shortest, that is, the main body 4a of the electric jack 4 is always positioned at the shortest distance with respect to the action point at the tip of the spindle 11. The driving of the solar cell array 3 by 4 can be stabilized.

  As shown in FIG. 5, when the spindle 11 of the electric jack 4 moves linearly and the solar cell array 3 rotates around the axis 8, the rotation angle of the solar cell array 3 with respect to the column 1 changes. Along with this, the angle formed between the back surface of the solar cell array 3 and the spindle 11 of the electric jack 4 is changed, and the angle formed between the spindle 11 and the support column 1 is changed, so that the solar cell array 3 is moved around the axis 8. Moves smoothly and smoothly.

  FIG. 8 is a cross-sectional view showing the main part of the electric jack 4. As shown in FIG. 8, a worm wheel 21 is rotatably supported inside the main body 4 a of the electric jack 4, and a female screw hole 21 a is formed at the center of the worm wheel 21. The spindle 11 has a male screw formed on its peripheral surface, and the spindle 11 is screwed into a female screw hole 21 a of the worm wheel 21. Further, a groove 11a is formed in the longitudinal direction of the side surface of the spindle 11, and a rotation stopper piece 11b is inserted into the groove 11a, and the rotation stopper piece 11b is fixed on the main body 4a side. Thereby, while the rotation of the spindle 11 is prohibited, the spindle 11 can move in the longitudinal direction.

  Further, as shown in FIGS. 5 and 6, a motor 22 is attached to the outside of the main body 4a of the electric jack 4, and the output shaft of the motor 22 reaches the inside of the main body 4a and is fixed to the tip of the output shaft. The worm gear 23 meshes with the worm wheel 21.

  Here, when the motor 22 is driven, the rotation of the output shaft is transmitted to the worm wheel 21 via the worm gear 23, and the worm wheel 21 rotates. At this time, since the rotation of the spindle 11 is prohibited, the spindle 11 does not rotate with the worm wheel 21. Instead, the spindle 11 is screwed into the female screw hole 21 a of the worm wheel 21 as the worm wheel 21 rotates. The male screw of the existing spindle 11 is sent out or pulled, and the spindle 11 moves linearly.

  Accordingly, the spindle 11 can be linearly driven by the motor 22 of the electric jack 4, and the solar cell array 3 can be rotated around the axis 8 by feeding or pulling the spindle 11 to the solar cell array 3 side. The light receiving surface on the front side of the solar cell array 3 can be sequentially directed from the east direction to the south direction to the west direction.

  In addition, the electric jack 4 having such a structure has a very large driving force of the spindle 11 and can accurately control the movement amount of the spindle 11. Furthermore, even if the wind pressure load or the like is applied to the solar cell array 3, the drive control of the electric jack 4 can be stably performed.

  In such a configuration, in order to make the light receiving surface on the front side of the solar cell array 3 follow the diurnal motion of the sun and always face the sun, the motor 22 of the electric jack 4 linearly moves the spindle 11 according to the time. It is necessary to control the rotation angle of the solar cell array 3 by adjusting the amount. For example, the time zone from sunrise to sunset is divided into 14 steps, the time of each step is set, and the solar cell array 3 in which the light receiving surface on the front side of the solar cell array 3 faces the sun at each time. The rotation angle is obtained, and the drive control amount (rotation angle of the output shaft) of the motor 22 of the electric jack 4 necessary for setting the rotation angle of the solar cell array 3 is obtained. Then, at each time, the motor 22 of the electric jack 4 is driven by the drive control amount, the solar cell array 3 is rotated, and the light receiving surface on the front side of the solar cell array 3 is directed toward the sun. Thereby, the light-receiving surface on the front side of the solar cell array 3 is directed stepwise toward the sun.

  Thus, in this embodiment, the back side of the solar cell array 3 is pivotally supported by the shaft 8 of the uniaxial support 2, the spindle 11 of the electric jack 4 is connected to the back side of the solar cell array 3, and the spindle is driven by the electric jack 4. 11 is linearly driven, and the solar cell array 3 is rotationally driven around the axis 8. The electric jack 4 not only has a sufficient driving force as compared with the hydraulic jack, but also can easily control the driving thereof. Moreover, even when the wind pressure load or the like is applied to the solar cell array 3, the drive control of the electric jack is not complicated, and stable drive is possible. Furthermore, there is no need for complicated maintenance of machinery such as hydraulic piping and pumps like a hydraulic jack, maintenance is easy, long-term maintenance-free operation is possible, and extensive inspection and maintenance is not required. Therefore, the operating rate of the apparatus can be improved. Furthermore, since the single electric jack 3 is used, drive control is very simple. In addition, since the solar cell array 3 is supported by the support 1, the solar cell array 3 is separated from the ground, the degree of freedom of installation location is increased, and the space below the solar cell array 3 can be effectively used. it can. Further, since the spindle 11 of the electric jack 4 is moved away from the back surface of the column 1, the spindle 11 does not interfere with the column 1.

  In addition, this invention is not limited to the said embodiment, It can deform | transform variously. For example, the shape and size of the solar cell array can be changed as appropriate. Moreover, instead of changing the direction of the light receiving surface on the front side of the solar cell array 3 stepwise, the direction of the light receiving surface may be changed smoothly.

It is a side view which shows one Embodiment of the tracking type solar power generation device of this invention. It is a side view which shows the periphery of the uniaxial support part in the tracking type solar power generation device of FIG. It is a front view which shows the periphery of the uniaxial support part of FIG. It is a top view which shows the solar cell array in the tracking type solar power generation device of FIG. It is a figure which shows the state which the solar cell array in the tracking type solar power generation device of FIG. 1 is rotating. It is a side view which expands and shows the periphery of the electric jack in the tracking type solar power generation device of FIG. It is a rear view which expands and shows the periphery of the electric jack of FIG. It is sectional drawing which shows the internal structure of the electric jack in the tracking type solar power generation device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Uniaxial support part 3 Solar cell array 4 Electric jack 5 Inclined plate 6 Shaft support part 7 Bearing part 8 Shaft 9 Panel frame 10 Reinforcement member 11 Spindle 12 Joint member 15 Bearing part 16 Shaft support part 17 Pin 21 Warm wheel 22 Motor 23 Worm gear

Claims (4)

A uniaxial support portion that pivotally supports the back side of the solar cell array by one axis, and supports the solar cell array to be rotatable around the one axis;
An electric jack having a spindle connected to the back side of the solar cell array at a position separated in a direction orthogonal to one axis of the uniaxial support portion;
A tracking type solar power generation apparatus, wherein the spindle is linearly driven by the electric jack, the back side of the solar cell array is pushed and pulled by the spindle, and the solar cell array is rotationally driven around the one axis.   The tracking type solar power generation device according to claim 1, wherein the electric jack is single. Comprising a column supporting the back side of the solar cell array via the uniaxial support part;
The tracking solar power generation apparatus according to claim 1, wherein the electric jack is attached to the support column.   The tracking solar power generation apparatus according to claim 1, wherein a spindle of the electric jack swings on a back side of the support column.

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