Switching driving device used in heliostat

Abstract

The utility model discloses a switching driving device used in a heliostat, comprising a switching part which is directly or indirectly fixedly arranged on a support base in the heliostat; the azimuth angle adjustment driving part is used for driving a reflector assembly in the heliostat to carry out azimuth angle adjustment, the azimuth angle adjustment driving part is arranged on the switching part, and the azimuth angle adjustment driving part comprises a shell and a driving unit used for driving the shell and the switching part to rotate relatively; the supporting part is arranged on the shell, the supporting part and the shell are integrally formed or connected in a welded mode, and the supporting part is hinged to a reflector assembly in the heliostat through a rotating shaft so that the reflector assembly can conduct pitch angle adjustment around the central axis of the rotating shaft. The azimuth angle adjusting driving part and the supporting part form an integral structure in an integral forming or welding mode, so that the switching driving device is higher in reliability, the integral strength is improved, the safety of the heliostat in a wind resistance environment is improved, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of solar thermal utilization, in particular to a switching drive device used in a heliostat. Background Art

[0002] Tower solar thermal utilization technology uses a large number of heliostats to focus sunlight onto a heat absorber mounted on the top of the tower, and utilizes solar energy by heating the fluid inside. The current main utilization form includes using the heated fluid to exchange heat with water as a working medium to generate high-temperature and high-pressure steam, and then using the generated high-temperature and high-pressure steam to drive a steam turbine to drive a generator to generate electricity.

[0003] Heliostats track the sun through rotation in both pitch and azimuth. Azimuth rotation typically uses a slewing reducer to drive the heliostat's mirror body (reflector assembly) in a circular motion. Currently, the slewing reducer and heliostat body are typically connected via a support base. The slewing reducer and support base are separate components, typically connected by bolts and other fastening mechanisms. However, the reliability of the connection and the overall rigidity of the slewing reducer and support base need to be improved. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a switching drive device for a heliostat, which adopts an integrated design and eliminates the original connecting bolts and other connecting parts between the reducer housing and the support base. This makes the connection reliability of the entire switching drive structure higher, improves the overall strength, increases the safety of the heliostat in wind-resistant environments, and reduces the cost.

[0005] A first aspect of the present invention provides a switching drive device for a heliostat, comprising:

[0006] An adapter portion, the adapter portion being directly or indirectly fixedly disposed on a supporting foundation in the heliostat;

[0007] An azimuth adjustment drive unit, configured to drive the reflector assembly in the heliostat to adjust its azimuth, the azimuth adjustment drive unit being disposed on the adapter and comprising a housing and a drive unit configured to drive the housing and the adapter to rotate relative to each other;

[0008] A support portion is provided on the shell, the support portion is integrally formed with the shell or welded, and the support portion is hinged to the reflector assembly in the heliostat through a rotating shaft, so that the reflector assembly can be adjusted in pitch angle around the central axis of the rotating shaft.

[0009] In one embodiment of the present invention, the drive unit includes a worm wheel, a worm and a drive assembly; the housing is provided with a worm wheel accommodating portion for accommodating the worm wheel and a worm accommodating portion for accommodating the worm, the support portion is arranged above the worm accommodating portion, and the orthographic projection of the worm accommodating portion on the adapter portion and the orthographic projection of the bottom surface of the support portion on the adapter portion at least partially overlap.

[0010] In one embodiment of the present invention, the worm accommodating portion is disposed on the side of the worm wheel accommodating portion, and the worm wheel and the worm are meshed with each other in the housing for transmission;

[0011] The worm gear is fixedly mounted on the adapter portion, and the housing can rotate relative to the worm gear;

[0012] The worm can rotate in the worm accommodating portion under the drive of the driving assembly, thereby driving the housing to rotate relative to the worm wheel.

[0013] In one embodiment of the present invention, a shaft blind hole is respectively opened on two opposite sides of the support portion, the central axes of the two shaft blind holes coincide with each other, and the shaft is disposed in each of the two shaft blind holes; or,

[0014] A rotating shaft through hole is provided on the supporting portion, and the rotating shaft is passed through the rotating shaft through hole.

[0015] In one embodiment of the present invention, a linear projection of the central axis of the rotating shaft on a horizontal plane does not coincide with a point projection of the rotation axis of the housing on the horizontal plane.

[0016] In one embodiment of the present invention, a connecting member is further provided on the azimuth angle adjustment driving portion, and the connecting member is hinged to the pitch angle driving device for driving the reflector assembly to adjust the pitch angle around the central axis of the rotating shaft.

[0017] In one embodiment of the present invention, the connecting member and the worm are respectively located on two opposite sides of the housing.

[0018] In one embodiment of the present invention, the central axis of the rotating shaft, the hinge axis of the connecting member and the pitch angle driving device, and the central axis of the worm are parallel to each other.

[0019] In one embodiment of the present invention, reinforcing ribs are provided in the support portion.

[0020] In one embodiment of the present invention, the longitudinal cross-section of the adapter drive device is an L-shaped structure, and the supporting portion is a supporting column.

[0021] A second aspect of the present invention provides a heliostat comprising a reflector assembly and the aforementioned switching drive device, wherein the switching drive device is used to drive the reflector assembly to adjust the azimuth angle. Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the prior art, the azimuth adjustment drive unit and the support base are designed as separate units. The support base includes a base and a support portion disposed on the base. When the azimuth adjustment drive unit is connected to the support base, the base of the support base is connected to the azimuth adjustment drive unit via fasteners such as bolts. The present invention provides a transfer drive device for a heliostat that utilizes an integrated molding or welding method to form the azimuth adjustment drive unit and the support portion as a single unit. This eliminates the prior art support base and the prior art fasteners such as bolts connecting the azimuth adjustment drive unit and the base of the support base. This improves the connection reliability of the entire transfer drive device structure, enhances its overall strength, increases the safety of the heliostat in wind-resistant environments, and reduces its cost.

[0023] 2. In the adapter drive device for a heliostat provided by an embodiment of the present invention, the orthographic projection of the worm accommodating portion on the adapter portion at least partially overlaps with the orthographic projection of the bottom surface of the support portion on the adapter portion, so that the worm accommodating portion can provide good support for the support portion, further improving the overall rigidity and pressure-bearing capacity of the support portion.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a transfer drive device provided in an embodiment of the present utility model;

[0026] Figure 2 A front view of a transfer drive device provided in an embodiment of the present utility model;

[0027] Figure 3 For the Figure 2 Sectional view of the middle BB axis;

[0028] Figure 4 This is a structural diagram of the transfer drive device installed on the heliostat in an embodiment of the present utility model;

[0029] In the figure: shell 1, support part 2, blind hole 2-1 of rotating shaft, adapter part 3, connecting piece 4, pin hole 4-1, worm gear 5, worm 6, column 7, sub-beam 81, first support beam 82, reflecting surface 83, main beam 84, central support 85, second support beam 86, first support 87, second support 88, pitch angle drive device 9, adapter drive device 10. DETAILED DESCRIPTION

[0030] The following examples will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that those skilled in the art may make various changes and improvements without departing from the scope of the present invention. Such changes and improvements are all within the scope of protection of the present invention.

[0031] Certain directional terms used in the following description of the drawings, such as "inner," "outer," "upper," "lower," "top," "bottom," and other directional terms, will be understood to have their normal meanings and refer to those directions associated with normal viewing of the drawings. Unless otherwise indicated, the directional terms described in this specification are generally in accordance with conventional directions understood by those skilled in the art.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In existing heliostats, the azimuth adjustment drive unit and support base are designed as separate components. The support base includes a base and a support portion mounted on the base. The azimuth adjustment drive unit is connected to the support base using fasteners such as bolts. In existing technologies, the separate design of the azimuth adjustment drive unit and support base results in weak connection reliability and overall rigidity, as well as high costs.

[0034] The present invention provides a transfer drive device, which adopts an integrated molding or welding connection method to form an azimuth adjustment drive part and a support part into an integral structure, eliminating the base of the support seat in the prior art and fasteners such as connecting bolts between the azimuth adjustment drive part and the base of the support seat in the prior art, thereby making the connection reliability of the structure of the entire transfer drive device higher, improving the overall strength, and increasing the safety of the heliostat in a wind-resistant environment, while reducing the cost. In addition, by at least partially overlapping the orthographic projection of the worm gear accommodating part on the transfer part with the orthographic projection of the bottom surface of the support part on the transfer part, the worm gear accommodating part can provide good support for the support part, further improving the overall rigidity and pressure-bearing capacity of the support part.

[0035] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0036] Example 1

[0037] Reference Figure 1-Figure 2 As shown, this embodiment provides a switching drive device 10 for a heliostat, comprising:

[0038] The adapter 3 can be directly or indirectly fixed on the supporting base of the heliostat;

[0039] An azimuth adjustment drive unit is used to drive the reflector assembly in the heliostat to adjust the azimuth angle. The azimuth adjustment drive unit is provided on the adapter 3 and includes a housing 1 and a drive unit for driving the housing 1 and the adapter 3 to rotate relative to each other.

[0040] The support portion 2 is provided on the shell 1. The support portion 2 is integrally formed with the shell 1 or connected by welding. The support portion 2 is hinged to the reflector assembly in the heliostat through a rotating shaft so that the reflector assembly can be adjusted in pitch angle around the central axis of the rotating shaft.

[0041] In this embodiment, the support portion 2 and the azimuth angle adjustment drive portion are connected by integral molding or welding, which can reduce costs on the one hand and improve the connection reliability between the azimuth angle adjustment drive portion and the support portion 2 on the other hand.

[0042] The supporting base in the heliostat in this embodiment is a component used to support the entire heliostat, for example, it can be a column 7, a bracket, etc.

[0043] The connection between the adapter part 3 and the supporting base can be a direct fixed connection or an indirect fixed connection through a connecting structure; for example, the adapter part 3 and the supporting base can be indirectly connected through a connecting structure, and the connecting structure can be a flange plate arranged on the supporting base. The adapter part 3 is set as a flange plate, and the indirect fixed connection between the adapter part 3 and the supporting base is achieved through the fixed connection between the two flange plates, thereby realizing the connection between the adapter drive device and the column; for another example, when a fixed connection is adopted between the adapter part 3 and the supporting base, the adapter part 3 can be a flange plate directly set on the supporting base, and the azimuth adjustment drive part is directly set on the flange plate on the supporting base.

[0044] Specifically, the drive unit in this embodiment includes a worm gear 5, a worm 6, and a drive assembly; the housing 1 includes a worm gear accommodating portion for accommodating the worm gear and a worm accommodating portion for accommodating the worm; the support portion 2 is disposed above the worm accommodating portion, and the orthographic projection of the worm accommodating portion on the adapter portion 3 at least partially overlaps with the orthographic projection of the support portion 2 on the adapter portion 3. This solution allows the worm accommodating portion to support the support portion 2, further improving the overall rigidity and pressure-bearing capacity of the support portion 3. It also fully utilizes the space below the support portion 2, making the overall structure of the adapter drive device 10 more compact.

[0045] The worm wheel accommodating portion is arranged on the side of the worm accommodating portion, and the worm wheel 5 and the worm 6 are engaged with each other in the housing 1 for transmission; the worm wheel 5 is fixedly mounted on the adapter portion 3, the housing 1 can rotate relative to the worm wheel 5, and the worm 6 can rotate in the worm accommodating portion under the drive of the drive assembly, thereby driving the housing to rotate relative to the worm wheel 5.

[0046] In one embodiment, the driving component is a driving motor, which drives the worm 6 to rotate.

[0047] In one embodiment, the worm receiving portion may be provided directly below the support portion 2. Figure 3 As shown, at this time, the orthographic projection of the worm accommodating portion on the adapter portion 3 and the orthographic projection of the bottom surface of the support portion 2 on the adapter portion 33 at least partially overlap, so that the worm accommodating portion can well support the support portion, further improving the overall rigidity and pressure bearing capacity of the support portion

[0048] In one embodiment, the adapter 3 fixedly mounted on the column 7 can be a fixed base, and the worm gear 5 is fixedly mounted on the fixed base. In addition, the adapter 3 can also be a connecting flange, which can be directly mounted on the supporting foundation or connected to the connecting flange on the supporting foundation by bolts.

[0049] In one embodiment, the housing 1 may be a box structure having a worm gear accommodating cavity for housing the worm gear 5 and a worm accommodating cavity for accommodating the worm 6. Both ends of the worm 6 are rotatably mounted in the worm accommodating cavity through bearings. A support portion 2 is integrally formed at a position on the box structure corresponding to the worm accommodating cavity. The support portion 2 may be a support column integrally formed on the box structure for connecting to the reflector assembly.

[0050] Reference Figure 1 、 Figure 3As shown, in this embodiment, the orthographic projection of the support portion 2 on the housing 1 entirely falls on the side of the housing 1 facing away from the worm gear 5, ensuring the stability of the integral structure of the housing 1 and the support portion 2. For example, when the maximum width S1 of the support portion 2 is no greater than the maximum outer diameter S2 of the transmission portion 1, the orthographic projection of the support portion 2 on the housing 1 entirely falls on the side of the housing 1 facing away from the worm gear 5.

[0051] Reference Figure 3 As shown, in this embodiment, reinforcing ribs are provided in the support portion 2 to improve the overall strength of the transfer drive device 10 , thereby ensuring the safety of the heliostat when subjected to wind loads and improving tracking accuracy.

[0052] Reference Figure 1 As shown, a shaft through hole 2-1 is provided on the support portion 2, a shaft is passed through the shaft through hole 2-1, the reflector assembly is connected to the shaft, and the reflector assembly can rotate around the central axis of the shaft.

[0053] In addition, in other embodiments, the two rotating shaft blind holes 2-1 opened on the support part 2 can be used to install the rotating shaft. The two rotating shaft blind holes 2-1 are respectively opened on the opposite sides of the support part 2. The central axes of the two rotating shaft blind holes 2-1 coincide with each other. The rotating shaft is installed in each of the two rotating shaft blind holes 2-1. The reflector assembly is connected to the rotating shaft, and the reflector assembly can rotate around the central axis of the rotating shaft.

[0054] Reference Figure 3 As shown, in this embodiment, the central axis of the shaft blind hole / shaft through hole 2-1 does not intersect with the rotation axis of the housing 1, that is, the linear projection of the central axis of the shaft on the horizontal plane does not coincide with the point projection of the central axis of the housing 1 on the horizontal plane, so as to avoid the main beam 84 in the reflector assembly, making the structure more compact, lowering the cost, and avoiding interference. Specifically, in this embodiment, as Figure 1-3 As shown, the support portion 2 is a support column integrally formed on the upper surface of the housing 1, and the support portion 2 is arranged near the edge of the housing 1, so that the longitudinal cross-section of the entire adapter drive device 10 (along the longitudinal cross-section) is Figure 2 The cross section of the middle BB axis is roughly L-shaped.

[0055] In one embodiment of the present invention, referring to Figure 1 、 Figure 3As shown, a connecting piece is fixedly provided on the outside of the shell 1, and the connecting piece is hinged to the pitch angle driving device for driving the reflector assembly to adjust the pitch angle around the central axis of the rotating shaft, wherein the connecting piece can be set as two connecting plates 4, and the two connecting plates 4 are each provided with a pin hole 4-1 for hinged to the telescopic end of the pitch angle driving device 9, and the central axes of the two pin holes 4-1 coincide with each other; in addition, the connecting piece can also be set as a U-shaped structure, and the pin holes 4-1 for hinged to the telescopic end of the pitch angle driving device 9 are respectively provided on the two straight sections of the U-shaped structure, and similarly, the central axes of the pin holes 4-1 on the two straight sections also coincide with each other.

[0056] Reference Figure 3 As shown, in this embodiment, the central axis of the shaft blind hole / shaft through hole 2-1, the central axis of the pin hole 4-1 and the central axis of the worm 6 are parallel to each other, ensuring that the heliostat will not get stuck when rotating in the pitch angle direction.

[0057] This embodiment also provides a heliostat, referring to Figure 4 As shown, the heliostat includes a reflector assembly, a column 7, a pitch angle driving device 9 and the above-mentioned switching driving device 10.

[0058] The column 7 serves as a supporting structure for the heliostat as a whole and is fixed on the site. The transfer drive device 10 is fixedly mounted on the column 7 via the transfer portion 3 in the transfer drive device 10 .

[0059] Among them, the reflector assembly can rotate around the central axis of the rotating shaft set in the adapter drive device 10 under the drive of the pitch angle drive device 9, so as to adjust the pitch angle of the reflecting surface 83. The adapter drive device 10 can drive the reflector assembly to rotate around the central axis of the column 7, so as to adjust the azimuth angle of the reflector. Specifically, in this embodiment, the pitch angle driving device 9 is an electric push rod, and the reflector assembly includes a reflector for reflecting light and a reflector bracket for supporting the reflector. Specifically, the reflector bracket includes a main beam 84 and a plurality of bracket units spaced apart on the main beam 84. Each bracket unit includes a central support 85 fixed on the main beam 84, a first support beam 82, a second support beam 86, and a sub-beam 8-1 fixedly connected to the upper part of the central support 85. In addition, a first support 87 and a second support 88 are fixedly provided on the main beam 84. The push rod cylinder of the electric push rod is hinged to the first support 87, the telescopic rod of the electric push rod is hinged to the connecting member in the transfer drive device 10, and the rotating shaft in the transfer drive device 10 is rotatably connected to the second support 88. With this structure, the reflector assembly can be driven to adjust the pitch angle around the central axis of the rotating shaft of the transfer drive device 10 through the extension and retraction of the electric push rod. It should be noted that, in addition to the electric push rod used in this embodiment, the pitch angle driving device 9 may also adopt a telescopic hydraulic cylinder, a telescopic air cylinder, a scissor jack, and other devices.

[0060] When the driving assembly drives the worm 6 to rotate, the adapter 3 remains stationary due to its fixed connection with the column 7, and the housing 1 rotates through the worm gear 5 and the worm 6. The housing 1 drives the support part 2 to rotate, and then drives the reflector assembly to rotate in azimuth.

[0061] The above describes specific embodiments of the present application. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the substantive content of the present application. In the absence of conflict, the embodiments of the present application and the features in the embodiments may be combined with each other in any manner.

Claims

1. A switching drive device for a heliostat, characterized in that: include: An adapter portion, the adapter portion being directly or indirectly fixedly disposed on a supporting foundation in the heliostat; An azimuth adjustment drive unit is provided on the adapter, and is configured to drive the reflector assembly in the heliostat for azimuth adjustment. The azimuth adjustment drive unit comprises a housing and a drive unit for driving the housing and the adapter to rotate relative to each other. A support unit is provided on the housing, and is integrally formed with or welded to the housing. The support unit is hingedly connected to the reflector assembly in the heliostat via a rotating shaft, so that the reflector assembly can be adjusted in pitch about the central axis of the rotating shaft.

2. The switching drive device for heliostat according to claim 1, characterized in that: The drive unit includes a worm wheel, a worm and a drive assembly; the housing is provided with a worm wheel accommodating portion for accommodating the worm wheel and a worm accommodating portion for accommodating the worm, the support portion is arranged above the worm accommodating portion, and the orthographic projection of the worm accommodating portion on the transition portion and the orthographic projection of the bottom surface of the support portion on the transition portion at least partially overlap.

3. The switching drive device for a heliostat according to claim 2, characterized in that: The worm accommodating portion is arranged on the side of the worm wheel accommodating portion, and the worm wheel and the worm are engaged with each other in the housing for transmission; the worm wheel is fixedly mounted on the adapter portion, and the housing can rotate relative to the worm wheel; the worm can rotate in the worm accommodating portion under the drive of the drive assembly, thereby driving the housing to rotate relative to the worm wheel.

4. The switching drive device for a heliostat according to claim 1, characterized in that: A shaft blind hole is respectively provided on two opposite sides of the support portion, the central axes of the two shaft blind holes coincide, and the shaft is provided in both shaft blind holes; or a shaft through hole is provided on the support portion, and the shaft is provided through the shaft through hole.

5. The switching drive device for a heliostat according to claim 1, characterized in that: A linear projection of the central axis of the rotating shaft on a horizontal plane does not coincide with a point projection of the rotation axis of the housing on the horizontal plane.

6. The switching drive device for a heliostat according to claim 2, characterized in that: It also includes a connecting piece fixedly arranged on the azimuth angle adjustment driving part, and the connecting piece is hinged to the pitch angle driving device for driving the reflector assembly to adjust the pitch angle around the central axis of the rotating shaft.

7. The switching drive device for a heliostat according to claim 6, characterized in that: The connecting member and the worm are respectively located on two opposite sides of the housing.

8. The switching drive device for a heliostat according to claim 6, characterized in that: The central axis of the rotating shaft, the hinge axis of the connecting member and the pitch angle driving device, and the central axis of the worm are parallel to each other.

9. The switching drive device for a heliostat according to claim 1, characterized in that: Reinforcing ribs are provided in the supporting portion.

10. The switching drive device for a heliostat according to claim 1, characterized in that: The longitudinal cross-section of the transfer drive device is L-shaped, and the support portion is a support column.

11. A heliostat, characterized in that: It comprises a reflector assembly and a switching drive device according to any one of claims 1 to 10, wherein the switching drive device is used to drive the reflector assembly to adjust the azimuth angle.

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