TWI546977B - Tilt type sun tracking device - Google Patents

Description

Tilting chasing device

The invention relates to a tilt type sun-tracking device, in particular to a double-axis tilt type sun-tracking device suitable for a solar power generation system.

The development of alternative energy sources has always been the direction of national efforts. Solar energy is one of the potential energy sources. The energy of the sun for one hour can provide one day's energy demand if it is effectively utilized. The advantage is that it has abundant reserves and will not be generated during power generation. Producing pollution helps to reduce carbon dioxide emissions, but the disadvantage is that the energy density is low and there must be enough area to generate enough energy.

In the early days of solar energy systems, solar panels were placed at a fixed angle. However, such solar panels, which could not be adjusted in direction with the sun, were less efficient to use and could not effectively collect solar energy. In view of this, in recent years, research on the chasing-type power generation system has been widely noticed, especially the two-axis drive chasing device is easier to grasp the angle and trajectory of the sun movement. Among them, the dual-axis chasing device can be mainly divided into the traditional elevation-azimuth tracking mode and the east-west-north-tracking mode after the coordinate conversion.

For example, the Republic of China Bulletin No. M364196 is designed in the elevation-azimuth tracking mode, which uses a horizontal toothed disk in combination with the first power source to provide an azimuthal angle change, and another power source to provide an elevation output. In this way, at noon, the solar panels need to be rotated 180 degrees and then chased after the sun, which will be lacking in control. In addition, the Republic of China Announcement No. M378286 adopts the east-west-north-north-day pursuit mode. The center of the cross-axis group provides east-west and north-south rotation, and the tension cable is used as the structure. . However, although the solar panel is set at 0 to 50 degrees with the bracket body, the angle must be manually set and cannot be directly controlled.

In addition, the reference planes of the above two types of biaxial tracking methods are parallel to the ground. When the season changes or the latitude deviation, the concentrating degree of the solar panel is affected, and the power generation efficiency is greatly reduced, so the conventional technology cannot be different for different The initial calibration position is given at the location or season. Inventors for this reason, in the spirit of active invention, think about a tilt-type chasing device that can solve the above problems, after several research experiments to complete the present invention.

The main object of the present invention is to provide a tilt-type sun-tracking device, which can provide a tilt angle equal to the latitude of the location in the initial state in the east-west-north-west chasing mode after the coordinate conversion. The datum plane is parallel to the Earth's rotation axis, and the angle caused by the daily solar trajectory can be changed. The variables vary linearly, effectively increasing the light receiving area of the solar panel and increasing power generation efficiency.

In order to achieve the above object, the inclined sun-tracking device of the present invention comprises a lower support frame, an upper support frame, a cross joint portion, a first drive mechanism and a second drive mechanism. The lower support frame comprises a support platform and a pillar body, the pillar body is fixed on the support platform as the structural support of the device; the top of the upper support frame is fixed with a solar receiving unit, which can be a solar panel for receiving the sun light source.

The cross joint portion includes a cross joint, two lower support seats, two upper support seats and a plurality of bearings. The two lower support seats respectively have a through hole fixed on the lower support frame, and the upper support seats respectively have a through hole, which is fixed on the On the upper support frame, the cross joint has four joint ends, each joint end is respectively disposed in each of the corresponding through holes, and a plurality of bearing sleeves are respectively sleeved between each of the through holes and each of the joint ends. Thereby, a rotation axis of the two axes is provided to rotate in the north-south direction and the east-west direction.

The first driving mechanism provides a north-south rotation power of the upper support frame, and includes a push rod, a connecting rod and a first driver. The two ends of the push rod are respectively pivoted at a pivot point of the upper support frame and fixed first. The driver and the two ends of the connecting rod are respectively pivotally connected to the push rod and the cross joint. In the initial state, the first driving mechanism pushes up the upper support frame, so that the upper support frame (reference surface) and the horizontal mask have the same latitude as the location The inclination angle is such that the east-west axis is parallel to the earth's rotation axis, and the north-south direction is equal to the current latitude.

The second driving mechanism provides the east support rotation of the upper support frame The force is fixed to the lower support frame, and includes a steering unit and a second driver. The steering unit has an input end and an output end. The input end is sleeved on one of the drive shafts of the second drive, and the output end is sleeved. At the joint end of the cross joint. Thereby, the torque provided by the second driver is changed by the steering unit to change its output direction and drive the cross joint so that the upper support frame rotates in the east-west direction.

The push rod may have a two-section telescopic rod member. When the push rod is extended or shortened, the upper support frame is rotated by the cross joint which is disposed on the upper support base as a rotating shaft, and can be rotated at least 600 mm. Travel distance.

In the present invention, a first carrier plate may be further included for locking the two lower support seats to the lower support frame. Meanwhile, in the present invention, a second carrier plate may be further included for locking the second driving mechanism to the lower support frame. Thereby, the components can be more stably locked on the lower support frame, so as to avoid knocking noise or deflection of the upper support frame reference surface due to swaying of the device during operation.

Wherein, the steering unit may be a spiral bevel gear set, and the torque provided by the driver can be converted into an output direction. The first driver and the second driver may be electric motors, and the motor corresponding to the horsepower output is selected according to the actual required torque to provide sufficient rotational kinetic energy of the upper support frame and the solar receiving unit.

Furthermore, the second driving mechanism may further comprise a deceleration unit connected to the input end of the second driver and the steering unit, and the deceleration unit may be a roller reducer, a planetary reducer or a combination thereof. By changing the reduction The speed ratio reduces the high speed torque of the second drive to match the speed of the sun by 15 degrees per hour to achieve low speed, non-intermittent operation.

The above summary and the following detailed description are exemplary in order to further illustrate the scope of the invention. Other objects and advantages of the present invention will be described in the following description and drawings.

2‧‧‧ lower support frame

21‧‧‧Support platform

22‧‧‧ pillar body

3‧‧‧Upper support

31‧‧‧Solar receiving unit

32‧‧‧ pivot point

4‧‧‧cross joint

41‧‧‧cross joint

411‧‧‧ joint end

412‧‧‧ joint end

42‧‧‧ lower support

421‧‧‧through hole

43‧‧‧Upper support

431‧‧‧through hole

44‧‧‧ bearing

5‧‧‧First drive mechanism

51‧‧‧Put

52‧‧‧ Connecting rod

53‧‧‧First drive

6‧‧‧Second drive mechanism

61‧‧‧steering unit

611‧‧‧ input

612‧‧‧output

62‧‧‧Deceleration unit

63‧‧‧Second drive

631‧‧‧ Output shaft

71‧‧‧First carrier board

72‧‧‧Second carrier board

θ‧‧‧Tilt angle

Φ‧‧‧ elevation angle

1 is a perspective view of a tilt type sun-tracking device in accordance with a preferred embodiment of the present invention.

2 is an exploded view of a tilt type sun-tracking device in accordance with a preferred embodiment of the present invention.

3 is a partial enlarged view of a tilt type sun-tracking device according to a preferred embodiment of the present invention.

4 is a north-south motion diagram of a tilt-type sun-tracking device according to a preferred embodiment of the present invention.

Fig. 5 is a diagram showing the east-west movement of the inclined sun-tracking device according to a preferred embodiment of the present invention.

1 to 3 are a perspective view, an exploded view, and a partially enlarged view of a tilt type sun-tracking device according to a preferred embodiment of the present invention. The figure shows a tilt type sun-tracking device including a lower support frame 2, an upper support frame 3, A cross joint portion 4, a first drive mechanism 5, a second drive mechanism 6, a first carrier plate 71 and a second carrier plate 72. The lower support frame 2 includes a support platform 21 and a pillar body 22. The support platform 21 is fixed to the ground, and the pillar body 22 is a hollow frame fixed to the support platform 21. A solar receiving unit 31 is fixed on the top of the upper support frame 3. In the embodiment, it is composed of four solar panels, and the size of one solar panel is about 1680 mm*1640 mm, and the size of the solar panel determines the pillar body 22 The height, when the required wattage is higher, the height of the pillar body 22 of the chasing mechanism must also be higher.

Next, as shown in FIGS. 2 and 3, the cross joint portion 4 includes a cross joint 41, two lower support seats 42, two upper support seats 43, and a plurality of bearings 44. The two lower support bases 42 respectively have a through hole 421 fixed on a first carrier plate 71 for facilitating subsequent locking of the entire carrier plate on the top inclined surface of the pillar body 22. The two upper support bases 43 respectively have a through hole 431 fixed to the upper support frame 3. The cross joint 41 has four joint ends 411, 412, 413, 414 and defines two axes perpendicular to each other. The joint ends 412, 414 are connected to the east-west pivot axis; the joint ends 411, 413 are connected to the north-south pivot axis. Each of the joint ends 411, 412, 413, 414 is respectively disposed in each of the corresponding through holes 421, 431. The plurality of bearings 44 are respectively sleeved between each of the through holes 421, 431 and each of the joint ends 411, 412, 413, 414, and provide relative rotation of the cross joint 41 and each of the through holes 421, 431. .

For the rotation control of the north-south direction, the first driving mechanism 5 is required to provide rotational power. As shown in FIG. 2 and FIG. 3, the first driving mechanism 5 includes a push rod 51, a connecting rod 52 and a first driver 53. . The push rod 51 is a two-section telescopic rod member that can be pushed up by shortening or shortening the push rod 51. The support frame 3 is rotated in the north-south direction and can reach a travel distance of at least 600 mm. One end of the push rod 51 is pivotally disposed on a pivot point 32 of the upper support frame 3, and the other end is connected to the first driver 53, wherein the first driver 53 is an electric motor to provide sliding of the push rod 51. kinetic energy. The two ends of the connecting rod 52 are respectively pivotally connected to the connecting end 412 of the push rod 51 and the cross joint 41 for connecting and driving. Accordingly, the joint end 412 of the cross joint 41 is connected to the upper support frame 3 by the first drive mechanism 5 as a control mechanism when rotating in the north-south direction.

For the rotation control of the east-west direction, the second drive mechanism 6 is required to provide the rotary power. As shown in FIG. 2 and FIG. 3, the second drive mechanism 6 includes a steering unit 61, a reduction unit 62, and A second driver 63 is fixed to the second carrier 72. The second actuator 63 is an electric motor. In use, the horsepower output is selected according to the actual torque required. Here, a servo motor having 2 hp (horsepower) is used. The second driver 63 is connected to a deceleration unit 62, which is a combination of a roller reducer and a planetary reducer. The number of teeth in the reducer is changed to achieve a desired reduction ratio, and the second drive 63 has a high speed torque. Reduced to match the speed of the sun at 15 degrees per hour to achieve low speed, non-intermittent operation.

In this embodiment, the steering unit 61 is a spiral bevel gear set having an input end 611 and an output end 612. After being decelerated, the input end 611 is sleeved in an output shaft 631 of the reduction unit 62, and the output is output. The end 612 is engaged with the input end 611 to change its torque direction, and the output end 612 is sleeved on the joint end 414 of the cross joint 41 to transmit torque to the cross joint 41 and drive the upper support frame 3 along the east-west direction. Rotating, providing low speed, Stable rotary power.

Please refer to FIG. 4, which is a north-south motion diagram of a tilt-type sun-tracking device according to a preferred embodiment of the present invention. As shown in the figure, in the initial state, the upper support frame 3 and the horizontal mask have the same inclination angle θ as the latitude of the location, and the plane formed by the support frame 3 is a new reference plane, which is different from the conventional double axis. The reference plane of the chasing device is parallel to the horizontal plane.

However, this datum is not fixed according to the latitude of its location, and it will change slightly due to the change of seasons. Therefore, the datum will produce an elevation angle φ change in the north-south direction, but the elevation angle φ is almost not in the daily pursuit of the day. If it changes, it is only necessary to adjust the elevation angle φ of the north-south direction by one day or several days, wherein the annual elevation angle of the elevation angle φ varies between ±23.5°.

Referring to FIG. 5, it is an east-west motion diagram of a tilt type sun-tracking device according to a preferred embodiment of the present invention. The east-west rotation is due to the inclination angle θ between the reference plane and the horizontal plane. The east-west axis is parallel to the rotation axis of the earth, which will cause the angular change caused by the solar trajectory to change linearly, which helps to control the rotation axis. Stable rotation. In addition, the second drive mechanism 6 is coupled to the appropriate reduction ratio via the cooperation of the steering unit 61 and the reduction unit 62, and the deceleration output is equivalent to the rotational speed of the solar angular velocity, and drives the upper support frame 3 and the solar energy. The receiving unit 31 is characterized by low speed and non-intermittent operation.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

2‧‧‧ lower support frame

21‧‧‧Support platform

22‧‧‧ pillar body

3‧‧‧Upper support

31‧‧‧Solar receiving unit

4‧‧‧cross joint

5‧‧‧First drive mechanism

51‧‧‧Put

52‧‧‧ Connecting rod

53‧‧‧First drive

6‧‧‧Second drive mechanism

61‧‧‧steering unit

62‧‧‧Deceleration unit

63‧‧‧Second drive

Claims (7)

An inclined sun-tracking device includes: a lower support frame, comprising a support platform and a pillar body, the pillar body is fixed on the support platform; an upper support frame having a solar receiving unit fixed at a top end thereof; a cross The joint portion includes a cross joint, two lower support seats, two upper support seats and a plurality of bearings. The two lower support seats respectively have a through hole fixed to the lower support frame, and the two upper support seats respectively have a through hole. Fixing on the upper support frame, the cross joint has four joint ends, each joint end is respectively disposed in each corresponding through hole, and the plurality of bearing sleeves are respectively sleeved between each through hole and each joint end; A first driving mechanism provides a north-south rotational power of the upper support frame, including a push rod, a connecting rod and a first driver, and the two ends of the push rod are respectively pivotally connected to one of the upper support frames Pointing and fixing the first driver, the two ends of the connecting rod are respectively pivotally connected to the push rod and the cross joint. In an initial state, the first driving mechanism pushes the upper support frame so that the upper support frame and the horizontal plane Have one a tilting angle of the same latitude of the location; and a second driving mechanism for providing the rotating power of the upper support frame in the east-west direction, which is fixed to the lower support frame, and includes a steering unit, a speed reducing unit and a second driver. The steering unit is a spiral bevel gear set and has an input end and an output end. The input end is sleeved on one of the drive shafts of the second drive, and the output end is sleeved on the joint end of the cross joint. The speed reduction unit is connected to the second driver and the input end of the steering unit. The tilt type sun-tracking device according to claim 1, wherein the push rod has a two-section telescopic rod member and has a stroke distance of at least 600 mm. The inclined sun-tracking device of claim 1, further comprising a first carrier plate for locking the two lower support seats to the lower support frame. The inclined sun-tracking device of claim 1, further comprising a second carrier plate for locking the second driver to the lower support frame. The tilt type sun-tracking device according to claim 1, wherein the speed reduction unit is a roller reducer, a planetary reducer, or a combination thereof. The tilt type sun-tracking device of claim 1, wherein the first driver is an electric motor. The tilt type sun-tracking device of claim 1, wherein the second driver is an electric motor.