Solar thermal power generation system, heliostat, tracking drive device and fixed base

Abstract

The present invention relates to a solar thermal power generation system, a heliostat, a tracking drive device and a fixed base. The heliostat includes a column and a tracking drive device arranged on the column, the tracking drive device includes a fixed base for being fixedly connected to the column and a turntable arranged above the fixed base, the turntable and the fixed base are connected by a bearing, a reflector is arranged on the turntable, the fixed base is a plate-type structure, the bearing is connected to the fixed base by a first connecting hole or a first stud, and the column is connected to the fixed base by a second connecting hole or a second stud. The fixed base is a plate-type structure, and the length of the fixed base in the axial direction of the column is small, thereby indirectly reducing the center of gravity of the turntable, enhancing the overall rigidity of the tracking drive device, and at the same time omitting the connecting flange and reinforcing ribs arranged on the fixed base, reducing the weight of the fixed base, and facilitating the guarantee of processing accuracy.

Description

Technical Field

[0001] The invention relates to a photothermal power generation system, a heliostat, a tracking drive device and a fixed base. Background Art

[0002] In a solar power plant, multiple heliostats are usually set up on the ground to track the movement of the sun, and to gather and reflect sunlight onto a collector tower, where the gathered solar energy is converted into electrical energy for power generation. However, since the position of the sun changes at different times, and the distances between different heliostats and the collector tower are also different, the heliostats require a specific tracking drive device to track the movement of the sun and reflect sunlight onto the collector tower.

[0003] A Chinese patent application with application publication number CN106575126A and application publication date 2017.04.19 discloses an azimuth rotation mechanism of a solar tracker, which includes a fixed base and a rotating support (i.e., a turntable) arranged on the fixed base for supporting a solar panel, the turntable and the fixed base are connected by a bearing, a hydraulic cylinder driving the turntable to rotate around the axis of the bearing is arranged on the turntable, and an eccentric rotating shaft for the hydraulic cylinder to be mounted on the fixed base to rotate around it is arranged on the fixed base.

[0004] The above-mentioned fixed base is a cylindrical structure, and the fixed base includes an upper flange, a lower flange and a connecting tube connected between the upper flange and the lower flange. The outer wall of the connecting tube is provided with reinforcing ribs connected to the lower flange. The length of the fixed base in the axial direction is relatively large, which causes the center of gravity of the turntable to be higher, thereby reducing the overall stiffness of the azimuth rotation mechanism. At the same time, the fixed base is heavy during production, and the alignment and processing accuracy of the upper flange and the lower flange are difficult to guarantee. Summary of the invention

[0005] The object of the present invention is to provide a fixed base to solve the problem that the fixed base in the prior art causes the center of gravity of the turntable to be higher, reduces the overall rigidity of the tracking drive device, and is heavy and difficult to ensure the processing accuracy; the present invention also provides a tracking drive device using the fixed base; the present invention also provides a heliostat using the tracking drive device; the present invention also provides a solar thermal power generation system using the heliostat.

[0006] In order to solve the above technical problems, the technical solution of the heliostat of the present invention is:

[0007] A heliostat comprises a column and a tracking drive device arranged on the column, wherein the tracking drive device comprises a fixed base for being fixedly connected to the column and a turntable arranged above the fixed base, the turntable and the fixed base are connected via a bearing, a reflector is arranged on the turntable, the fixed base is a plate-type structure, the bearing is connected to the fixed base via a first connecting hole or a first stud, and the column is connected to the fixed base via a second connecting hole or a second stud.

[0008] The beneficial effects of this technical solution are: the fixed base is a plate-type structure, and the length of the fixed base in the axial direction of the column is relatively small, which indirectly lowers the center of gravity of the turntable and enhances the overall rigidity of the tracking drive device. At the same time, the connecting flange and reinforcing ribs provided on the fixed base are omitted, thereby reducing the weight of the fixed base and facilitating the guarantee of processing accuracy.

[0009] The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole. The light hole is easy to process, the first connection hole is located inside the second connection hole, which is convenient for connection with the inner ring of the bearing, and the second connection hole is located outside, which is convenient for enhancing the fixing strength of the column to the fixed base.

[0010] The turntable is provided with a hydraulic cylinder for driving the turntable to rotate around the axis of the bearing, and the fixed base is also integrally provided with an eccentric rotating shaft for the hydraulic cylinder to be sleeved and connected. The eccentric rotating shaft is integrally provided on the fixed base, and the structural strength is high.

[0011] The technical solution of the tracking drive device of the present invention is:

[0012] The tracking drive device comprises a fixed base for fixedly connecting with a column of a heliostat and a turntable arranged above the fixed base, wherein the turntable and the fixed base are connected via a bearing, the fixed base is a plate-type structure, and a first connecting hole or a first stud for connecting with the bearing is provided on the fixed base, and a second connecting hole or a second stud for connecting with the column is also provided on the fixed base.

[0013] The beneficial effects of this technical solution are: the fixed base is a plate-type structure, and the length of the fixed base in the axial direction of the column is relatively small, which indirectly lowers the center of gravity of the turntable and enhances the overall rigidity of the tracking drive device. At the same time, the connecting flange and reinforcing ribs provided on the fixed base are omitted, thereby reducing the weight of the fixed base and facilitating the guarantee of processing accuracy.

[0014] The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole. The light hole is easy to process, the first connection hole is located inside the second connection hole, which is convenient for connection with the inner ring of the bearing, and the second connection hole is located outside, which is convenient for enhancing the fixing strength of the column to the fixed base.

[0015] The turntable is provided with a hydraulic cylinder for driving the turntable to rotate around the axis of the bearing, and the fixed base is also integrally provided with an eccentric rotating shaft for the hydraulic cylinder to be sleeved and connected. The eccentric rotating shaft is integrally provided on the fixed base, and the structural strength is high.

[0016] The technical solution of the fixed base of the present invention is:

[0017] The fixed base is a plate-shaped structure, and is provided with a first connection hole or a first stud for connecting to the bearing of the tracking drive device, and is also provided with a second connection hole or a second stud for connecting to the column of the heliostat.

[0018] The beneficial effects of this technical solution are: the fixed base is a plate-type structure, and the length of the fixed base in the axial direction of the column is relatively small, which indirectly lowers the center of gravity of the turntable and enhances the overall rigidity of the tracking drive device. At the same time, the connecting flange and reinforcing ribs provided on the fixed base are omitted, thereby reducing the weight of the fixed base and facilitating the guarantee of processing accuracy.

[0019] The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole. The light hole is easy to process, the first connection hole is located inside the second connection hole, which is convenient for connection with the inner ring of the bearing, and the second connection hole is located outside, which is convenient for enhancing the fixing strength of the column to the fixed base.

[0020] The fixed base is also integrally provided with an eccentric rotating shaft for connection with the hydraulic cylinder sleeve of the tracking drive device. The eccentric rotating shaft is integrally provided on the fixed base, and has high structural strength.

[0021] The technical solution of the solar thermal power generation system of the present invention is:

[0022] A solar thermal power generation system includes a heat collecting tower and a plurality of heliostats arranged around the heat collecting tower, wherein the heliostats include a column and a tracking drive device arranged on the column, wherein the tracking drive device includes a fixed base for being fixedly connected to the column and a turntable arranged above the fixed base, wherein the turntable and the fixed base are connected via a bearing, a reflector is arranged on the turntable, the fixed base is a plate-type structure, the bearing is connected to the fixed base via a first connecting hole or a first stud, and the column is connected to the fixed base via a second connecting hole or a second stud.

[0023] The beneficial effects of this technical solution are: the fixed base is a plate-type structure, and the length of the fixed base in the axial direction of the column is relatively small, which indirectly lowers the center of gravity of the turntable and enhances the overall rigidity of the tracking drive device. At the same time, the connecting flange and reinforcing ribs provided on the fixed base are omitted, thereby reducing the weight of the fixed base and facilitating the guarantee of processing accuracy.

[0024] The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole. The light hole is easy to process, the first connection hole is located inside the second connection hole, which is convenient for connection with the inner ring of the bearing, and the second connection hole is located outside, which is convenient for enhancing the fixing strength of the column to the fixed base.

[0025] The turntable is provided with a hydraulic cylinder for driving the turntable to rotate around the axis of the bearing, and the fixed base is also integrally provided with an eccentric rotating shaft for the hydraulic cylinder to be sleeved and connected. The eccentric rotating shaft is integrally provided on the fixed base, and the structural strength is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of Example 1 of the heliostat of the present invention;

[0027] Figure 2 It is an exploded schematic diagram of the tracking drive device of the heliostat embodiment 1 of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a fixed base of Example 1 of the heliostat of the present invention;

[0029] Figure 4 for Figure 3 A front view of a fixed base;

[0030] Figure 5 for Figure 4 A top view of a fixed base;

[0031] Figure 6 for Figure 4 Bottom view of the fixed base.

[0032] Markings in the figure: 1. Column; 2. Fixed base; 3. Bearing; 4. Turntable; 5. Reflector; 6. Azimuth cylinder; 7. Pitch cylinder; 21. First connecting hole; 22. Second connecting hole; 23. Eccentric rotating axis; 24. Support ribs. DETAILED DESCRIPTION

[0033] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] Embodiment 1 of the heliostat of the present invention, as Figures 1 to 6 As shown, the heliostat includes a column 1 and a tracking drive device arranged on the column 1, and a reflector 5 is fixedly arranged on the tracking drive device. The tracking drive device includes a fixed base 2 and a turntable 4 arranged above the fixed base 2, the fixed base 2 is fixedly connected to the column 1, and the turntable 4 is connected to the fixed base 2 through a bearing 3. The turntable 4 can rotate around the axis of the bearing through the bearing 3, thereby driving the reflector 5 to rotate and track the position of the sun.

[0035] The fixed base 2 is a plate-type structure, and the length of the fixed base 2 in the axial direction of the column 1 is relatively small, thereby indirectly lowering the center of gravity of the turntable 4 and enhancing the overall rigidity of the tracking drive device. The fixed base 2 is provided with a first connecting hole 21 for connecting with the bearing 3 and a second connecting hole 22 for connecting with the column 1. The first connecting hole 21 and the second connecting hole 22 are both smooth holes, which are easy to process. In other embodiments, the first connecting hole and the second connecting hole can also be threaded holes. The first connecting hole 21 is located on the inner side of the second connecting hole 22. The first connecting hole 21 is connected to the inner ring of the bearing 3, and the second connecting hole 22 is connected to the flange at the top of the column 1 by bolts.

[0036] The fixed base 2 is also integrally provided with an eccentric rotating shaft 23, which is arranged away from the center of the fixed base 2. The eccentric rotating shaft 23 is fixedly connected to the fixed base 2 through three supporting ribs 24 to avoid uneven force on the fixed base during rotation, which causes load offset and causes deformation of the raceway of the bearing 3 and causes jamming. Three azimuth oil cylinders 6 are sleeved on the eccentric rotating shaft 23, and the azimuth oil cylinders 6 are fixedly connected to the turntable 4. When the azimuth oil cylinders 6 are extended and retracted, the extension lengths of different azimuth oil cylinders 6 are different, so that the azimuth oil cylinders 6 rotate around the eccentric rotating shaft 23, and drive the turntable 4 to rotate around the center line of the bearing, thereby driving the reflector 5 to track the sun's azimuth, and the azimuth oil cylinders 6 form a hydraulic cylinder that drives the turntable 4 to rotate.

[0037] The turntable 4 is also hingedly equipped with a pitch angle cylinder 7, the cylinder body of the pitch angle cylinder 7 is hinged to the reflector 5, and the pitch angle cylinder 7 drives the reflector 5 to make a pitch rotation when extending and retracting, thereby adjusting the angle at which the reflector 5 receives sunlight to ensure that the sunlight is directly projected onto the reflector 5.

[0038] Embodiment 2 of the heliostat of the present invention is different from Embodiment 1 in that: in Embodiment 1, a first connecting hole is provided on the fixed base to be connected to the bearing, and a second connecting hole is provided on the fixed base to be connected to the column. In this embodiment, a first stud and a second stud may also be fixedly provided on the fixed base, the first stud is inserted into the connecting hole of the bearing to be connected to the bearing, and the second stud is inserted into the connecting hole of the column to be connected to the column.

[0039] The specific structure of the tracking drive device in the embodiment of the present invention is the same as the specific structure of the tracking drive device in any of the above-mentioned embodiments of the heliostat, and will not be described in detail here.

[0040] The specific structure of the embodiment of the fixed base of the present invention is the same as the specific structure of the fixed base in any of the embodiments of the heliostat described above, and will not be described in detail herein.

[0041] An embodiment of the solar thermal power generation system of the present invention includes a heat collecting tower and a plurality of heliostats arranged around the heat collecting tower. The specific structure of the heliostat is the same as the specific structure of the heliostat in any of the above-mentioned embodiments of the heliostat, which will not be repeated here.

Claims

1. A heliostat, comprising a column and a tracking drive device arranged on the column, wherein the tracking drive device comprises a fixed base for being fixedly connected to the column and a turntable arranged above the fixed base, wherein the turntable is connected to the fixed base via a bearing, and a reflector is arranged on the turntable. Features: The fixed base is a plate-type structure, the bearing is connected to the fixed base through a first connecting hole or a first stud, the column is connected to the fixed base through a second connecting hole or a second stud, a pitch angle cylinder is hinged between the turntable and the reflector, the turntable is provided with a pitch angle cylinder hinge seat and a reflector hinge seat, the pitch angle cylinder includes a piston rod hinged on the pitch angle cylinder hinge seat and a cylinder body hinged on the rear part of the reflector; the reflector hinge seat includes a top surface part connected to the top surface of the turntable body and a side surface part connected to the side surface of the turntable body.

2. The heliostat according to claim 1, Features: The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole.

3. The heliostat according to claim 2, Features: The turntable is provided with a hydraulic cylinder for driving the turntable to rotate around the axis of the bearing, and the fixed base is also integrally provided with an eccentric rotating shaft for the hydraulic cylinder to be sleeved and connected.

4. A tracking drive device, comprising a fixed base for fixedly connecting to the column of the heliostat and a turntable arranged above the fixed base, the turntable and the fixed base are connected by a bearing, and a reflector is arranged on the turntable. Features: The fixed base is a plate-type structure, and is provided with a first connecting hole or a first stud for connecting to the bearing, and is also provided with a second connecting hole or a second stud for connecting to the column. A pitch angle cylinder is hinged between the turntable and the reflector, and the turntable is provided with a pitch angle cylinder hinge seat and a reflector hinge seat. The pitch angle cylinder includes a piston rod hinged on the pitch angle cylinder hinge seat and a cylinder body hinged on the rear part of the reflector; the reflector hinge seat includes a top surface part connected to the top surface of the turntable body and a side surface part connected to the side surface of the turntable body.

5. The tracking drive device according to claim 4, Features: The first connection hole and the second connection hole are both light holes, and the first connection hole is located inside the second connection hole.

6. The tracking drive device according to claim 5, Features: The turntable is provided with a hydraulic cylinder for driving the turntable to rotate around the axis of the bearing, and the fixed base is also integrally provided with an eccentric rotating shaft for the hydraulic cylinder to be sleeved and connected.

7. A solar thermal power generation system, comprising a heat collecting tower and a plurality of heliostats arranged around the heat collecting tower. Features: The heliostat is the heliostat according to any one of claims 1 to 3.

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