A heliostat

Abstract

The application discloses a heliostat, which comprises a mirror assembly, a worm and gear rotary speed reducer for azimuth adjustment, a connecting seat and a height angle driving device for height angle adjustment. The connecting seat is fixedly arranged above the worm and gear rotary speed reducer and comprises a connecting seat body and a rotating shaft assembly arranged on the upper portion of the connecting seat body. The height angle driving device comprises a first end and a second end which can move close to or away from each other. The mirror assembly is connected with the rotating shaft assembly and can rotate around the central axis of the rotating shaft assembly. The first end of the height angle driving device is hinged with the lower portion of the connecting seat body or the worm and gear rotary speed reducer, and the second end is hinged with the mirror assembly. A plane perpendicular to the azimuth rotation axis is a projection plane. The projections of the straight line, on which the first end and the second end of the height angle driving device are located, on the projection plane and the projection of the central axis of the worm in the worm and gear rotary speed reducer on the projection plane all intersect.

Description

Technical Field

[0001] This invention belongs to the field of tower solar thermal power generation technology, and particularly relates to a heliostat. Background Technology

[0002] Solar energy is being used more and more as a clean and renewable energy source. In particular, solar thermal power generation technology is an emerging solar energy utilization technology following photovoltaic power generation technology. Among them, tower solar thermal power generation technology has received widespread attention due to its advantages of high power generation quality, low impact on the power grid, and energy storage.

[0003] In tower solar thermal power generation, the function of the heliostat is to concentrate sunlight onto the receiver. The good rigidity of the heliostat is a good guarantee for its high-precision focusing of reflected sunlight. Generally, the rigidity of the heliostat is improved by increasing the specifications, size or material grade of related components in the heliostat, but this will lead to an increase in the cost of the heliostat. Summary of the Invention

[0004] To address the above problems, the present invention provides a heliostat, comprising:

[0005] A mirror assembly used to reflect light;

[0006] A worm gear reducer is used to drive the reflector assembly to adjust its azimuth angle;

[0007] A connecting seat is fixedly disposed above the worm gear rotary reducer. The connecting seat includes a connecting seat body and a rotating shaft assembly disposed on the upper part of the connecting seat body.

[0008] An elevation angle driving device includes a first end and a second end that can move closer to or further away from each other;

[0009] The reflector assembly is connected to the rotating shaft assembly, and the reflector assembly can rotate around the central axis of the rotating shaft assembly. The first end of the elevation angle driving device is hinged to the lower part of the connecting seat body or the worm gear rotary reducer, and the second end of the elevation angle driving device is hinged to the reflector assembly. The elevation angle driving device is used to drive the reflector assembly to adjust the elevation angle.

[0010] Using a plane perpendicular to the azimuth rotation axis as the projection plane, the projection of the central axis of the worm in the worm gear rotary reducer onto the projection plane is the first projection line. The projection of the straight line containing the first and second ends of the elevation angle driving device of the reflector assembly onto the projection plane at any elevation angle is the second projection line. The first projection line and the second projection line intersect.

[0011] In an embodiment, the first end and the second end of the height angle driving device can move away from or close to each other along a straight line, and a projection of the straight line on the projection plane is a second projection line, and the first projection line intersects the second projection line.

[0012] In an embodiment, the first projection line and the second projection line are perpendicular to each other.

[0013] In an embodiment, a plane that passes through the central axis of the rotating shaft assembly and is perpendicular to the projection plane is a boundary surface, and the height angle driving device and the worm are located on the same side of the boundary surface.

[0014] In an embodiment, a projection of the straight line on the end surface of the worm divides the worm.

[0015] In an embodiment, the height angle driving device is one of an electric push rod, a telescopic hydraulic cylinder, a telescopic air cylinder, or a shear jack.

[0016] In an embodiment, the worm and worm gear rotary reducer comprises a worm, a worm, a driving part, and a housing.

[0017] The housing comprises a worm housing and a worm accommodating cavity, the worm accommodating cavity is fixedly connected to the side surface of the worm housing, the worm housing covers the worm, the worm is accommodated in the worm accommodating cavity, and the worm can rotate in the worm accommodating cavity.

[0018] The worm and the worm are meshed with each other in the housing, and the worm and the housing can rotate relative to each other under the drive of the worm.

[0019] The driving part is fixedly connected to the housing, and the output end of the driving part is connected to the input end of the worm for driving the worm to rotate.

[0020] In an embodiment, the worm circumferential outer wall and the worm housing circumferential inner wall are connected by a bearing, so that the worm and the housing can rotate relative to each other.

[0021] In an embodiment, the worm and worm gear rotary reducer further comprises a base, the base is fixedly connected to the bottom end surface of the worm, and the worm and worm gear rotary reducer is connected to other components in the heliostat through the base.

[0022] In an embodiment, a stand column is further provided, the worm and worm gear rotary reducer is fixedly arranged at the top end of the stand column through the base, and the axis of the stand column coincides with the axis of the worm.

[0023] In an embodiment, the first end of the height angle driving device is hinged to an axis of the lower part of the connecting seat body or the worm gear rotary speed reducer, the second end of the height angle driving device is hinged to an axis of the mirror assembly, and the central axis of the rotating shaft assembly is parallel to the axes.

[0024] Compared with the prior art, the present application has the following advantages and positive effects:

[0025] In actual application, the heliostat is in the open environment. Because the reflecting mirror in the heliostat has a large area, the force receiving surface of the heliostat is large. Therefore, in windy weather, the heliostat is subjected to a large wind force, and there is a risk of overturning. In general, in order to improve the wind resistance of the heliostat, the specifications, sizes, and material grades of the related components in the heliostat are improved to increase the rigidity of the heliostat as a whole, thereby improving the wind resistance of the heliostat.

[0026] The present application specially sets the relative positions of the worm gear rotary speed reducer and the height angle driving device in the heliostat. When the mirror assembly is at any height angle, the straight line where the first end and the second end of the height angle driving device are located intersects the projection of the worm shaft axis on the plane perpendicular to the azimuth rotation axis. When the heliostat is subjected to a wind force, the connecting seat and the mirror assembly have a tendency to overturn away from or close to the height angle driving device. Because the first end and the second end of the height angle driving device are connected to the connecting seat and the mirror assembly, respectively, they can limit the overturning, thereby improving the anti-overturning ability of the heliostat. When the heliostat is subjected to a wind force, the connecting seat and the mirror assembly have a tendency to overturn to the two sides of the straight line where the first end and the second end of the height angle driving device are located. Because the worm in the worm gear rotary speed reducer and the structure around the worm (such as the part of the shell wrapping the worm) have a reinforcing rib-like effect, they can also improve the anti-overturning ability of the heliostat. Therefore, by specially setting the relative positions of the worm gear rotary speed reducer and the height angle driving device, the anti-overturning ability of the heliostat in two directions is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not considered as limiting the application.

[0028] Figure 1 FIG. 1 is a structural schematic diagram of a heliostat according to the present application;

[0029] Figure 2 FIG. 2 is a structural schematic diagram of a worm gear rotary speed reducer and a height angle driving device according to the present application;

[0030] Figure 3 A structure schematic view of a worm gear rotary speed reducer according to the present application;

[0031] Figure 4 A cross-sectional view of a worm gear rotary speed reducer according to the present application;

[0032] Figure 5 Another cross-sectional view of a worm gear rotary speed reducer according to the present application;

[0033] Figure 6 A schematic view of a second projection line according to the present application;

[0034] Figure 7 A schematic view of a first projection line and a second projection line according to the present application;

[0035] Figure 8 A schematic view of a part of the internal structure of a height angle driving device according to the present application.

[0036] Explanation of reference numerals:

[0037] 1: stand; 2: worm gear rotary speed reducer; 21: base; 22: worm gear; 23: worm; 24: housing; 25: driving part; 26: protection box; 27: worm accommodating cavity; 28: worm cover; 3: height angle driving device; 4: connecting seat; 41: connecting seat body; 42: rotating shaft assembly; 43: first end connecting piece; 5: mirror assembly; 51: first beam; 52: mirror; 53: sub beam; 54: main beam; 55: central support; 56: second beam; 57: main beam support; 58: height angle driving device connecting support; 6: projection surface; 7: first projection line; 8: second projection line; 9: screw rod; 10: nut. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0039] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown schematically, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0040] Referring to Figures 1 to 7 The embodiment provides a heliostat, which comprises a stand 1, a mirror assembly 5, a worm and gear rotary reducer 2, a height angle driving device 3 and a connecting seat 4.

[0041] The stand 1 serves as a support structure of the heliostat as a whole and is fixed on a site.

[0042] The mirror assembly 5 is used for reflecting light and comprises a mirror 52 and a mirror support for supporting the mirror 52. Specifically, the mirror support comprises a main beam 54 and a plurality of support units which are arranged at intervals on the main beam. Each support unit comprises a central support 55, a first support beam 51, a second support beam 56 and a secondary beam 53 which is connected to the central support 55.

[0043] The worm and gear rotary reducer 2 is used for driving the mirror assembly 5 to make an azimuth angle adjustment. Specifically, the worm and gear rotary reducer 2 drives the mirror 52 to rotate around the central axis of the worm so as to adjust the azimuth angle of the mirror 52.

[0044] The worm and gear rotary reducer 2 comprises a worm wheel 22, a worm 23, a housing 24, a driving part 25 and a base 21. The housing 24 comprises a worm wheel cover 28 and a worm accommodating cavity 27 which is fixedly connected to the side surface of the worm wheel cover 28. The worm wheel cover 28 covers the worm wheel 22, the worm 23 is accommodated in the worm accommodating cavity 27 and can rotate in the worm accommodating cavity 27. The worm wheel 22 and the worm 23 are in mesh with each other in the housing 24, and the worm wheel 22 and the housing 24 can rotate relative to each other under the driving of the worm 23. The circumferential outer wall of the worm wheel 22 and the circumferential inner wall of the worm wheel cover 28 are connected by a bearing, so that the worm wheel 22 and the housing 24 can rotate relative to each other.

[0045] The driving part 25 is fixedly connected to the housing 24, the output end of the driving part 25 is connected to the input end of the worm 23 and is used for driving the worm 23 to rotate. In the embodiment, the driving part 25 is a driving motor. In order to protect the driving motor, the driving motor is arranged in a protection box 26, and the protection box 26 is fixedly connected to the housing 24. The base 21 is fixedly connected to the bottom end surface of the worm wheel 22, and the worm and gear rotary reducer 2 is connected to other components in the heliostat through the base 21.

[0046] When the worm and gear rotary reducer 2 is running, the shell 24 and the base 21 rotate relative to each other, and the two are connected with the connecting seat body 41 and the column 1 in the heliostat respectively. The column 1 can be fixedly connected with the base 21, or can be fixedly connected with the shell 24. When the base 21 is fixedly connected with the top end of the column 1, the shell 24 is connected with the connecting seat body 41, at this time, the worm wheel 22 is fixed, and when the driving part 25 drives the worm 23 to rotate, the worm 23 will also rotate around the axis of the worm wheel 22, and the shell 24 will be driven by the worm 23 to rotate around the axis of the worm wheel 22, thereby driving the connecting seat 4 to rotate. When the shell 24 is fixedly connected with the top end of the column 1, the base 21 is located at the top of the worm and gear rotary reducer 2, the connecting seat body 41 is connected with the base 21, at this time, the worm 23 will rotate under the driving of the driving part 25, and the worm wheel 22 will rotate around its own axis under the action of the worm 23, thereby driving the base 21 to rotate, so that the connecting seat 4 rotates. In this embodiment, the base 21 is fixedly connected with the top end of the column 1 at the bottom of the worm and gear rotary reducer 2, and the connecting seat body 41 is arranged above the worm and gear rotary reducer 2 and connected with the shell 24.

[0047] Preferably, the axis of the worm wheel 22 coincides with the axis of the column 1, which is beneficial to improve the stability of the heliostat.

[0048] The elevation angle driving device 3 comprises a first end and a second end which can move relative to each other to approach or move away from each other. The relative movement between the first end and the second end of the elevation angle driving device 3 can be linear motion, or can be curved motion, etc., which is not limited. Preferably in this embodiment, the relative movement between the first end and the second end of the elevation angle driving device 3 is linear motion, and the elevation angle driving device 3 can be one of an electric push rod, a telescopic hydraulic cylinder, a telescopic air cylinder, a shearing jack, or can be a device composed of a screw rod and a nut, that is, as shown in the figure, one end of the screw rod 9 is hinged with the lower part of the connecting seat body 41 or the worm and gear rotary reducer 2, and the nut 10 on the screw rod 9 is hinged with the mirror assembly 5, and the height angle of the reflecting surface is adjusted by the up and down movement of the nut 10 on the screw rod 9, etc., and the specific structure of the elevation angle driving device 3 is not limited. Figure 8

[0049] ​The connecting seat 4 is fixedly arranged above the worm gear rotary reducer 2, and comprises a connecting seat body 41 and a rotating shaft assembly arranged on the upper portion of the connecting seat body 41. In the embodiment, the connecting seat body 41 is in an L-shaped structure, and the rotating shaft assembly comprises a connecting seat sleeve 42 and a rotating shaft (not shown in the figure) assembled in the connecting seat sleeve. In other embodiments, the connecting seat body 41 can also be in a C-shaped structure or a reversed T-shaped structure, etc. The connecting seat 41 can also be a hinged seat fixedly arranged above the worm gear rotary reducer 2. When the connecting seat 41 is a hinged seat, the rotating shaft assembly can be a combination of a hinged hole and a pin shaft arranged on the hinged seat. The connecting seat 41 can also be a bearing seat fixedly arranged above the worm gear rotary reducer 2. When the connecting seat 41 is a bearing seat, the rotating shaft assembly can be a bearing arranged in the bearing seat. The main beam 54 in the mirror assembly 5 is rotatably connected to the bearing seat through the bearing in the bearing seat, which is not limited here.

[0050] The mirror assembly 5 is connected to the rotating shaft in the rotating shaft assembly, and the mirror assembly 5 can rotate around the central axis of the rotating shaft assembly to adjust the height angle of the mirror assembly. The first end of the height angle driving device 3 is hingedly connected to the lower portion of the connecting seat body 41 or the worm gear rotary reducer 2, and the second end of the height angle driving device 3 is hingedly connected to the mirror assembly 5. Therefore, the height angle driving device 3 can adjust the height angle of the mirror 52 by changing the distance between the first end and the second end. Specifically, in the embodiment, the mirror assembly is connected to the rotating shaft in the rotating shaft assembly through the main beam support 57 arranged on the main beam 54, the first end of the height angle driving device 3 is hingedly connected to the first end connecting piece 43 arranged on the lower portion of the connecting seat 4, and the second end of the height angle driving device 3 is hingedly connected to the height angle driving device connecting support 58 arranged on the main beam 54.

[0051] Preferably, the axis around which the first end of the height angle driving device 3 is hingedly connected to the lower portion of the connecting seat body 41 or the worm gear rotary reducer 2, the axis around which the second end of the height angle driving device 3 is hingedly connected to the mirror assembly 5, and the central axis of the rotating shaft assembly 42 are parallel to each other. It should be noted that the first end and the second end of the height angle driving device 3 are relative concepts, which means that the two can move relative to each other. For example, if the telescopic rod in the electric push rod is defined as the first end, then the push rod cylinder in the electric push rod is the second end. If the push rod cylinder in the electric push rod is defined as the first end, then the telescopic rod in the electric push rod is the second end.

[0052] A plane perpendicular to the azimuth rotation axis (i.e. the center axis of the worm wheel) is set as the projection plane 6, the projection of the center axis of the worm on the projection plane 6 is a first projection line 7, the projection of the straight line where the first end and the second end of the height angle driving device 3 are located on the projection plane 6 is a second projection line 8 when the reflector 52 is at any height angle, and the second projection line 8 intersects the first projection line 7. In the embodiment, the first end and the second end can move relative to the straight line, and the first projection line 7 and the second projection line 8 intersect.

[0053] In actual application, the heliostat is in the field environment. Since the reflector 52 in the heliostat has a large area (usually 20-100 square meters), the force receiving surface of the heliostat is large, so in windy weather, the heliostat will be subjected to a large wind force, and there is a risk of overturning. In general, in order to improve the wind resistance of the heliostat, the specifications, sizes, and material grades of related components in the heliostat are increased to improve the rigidity of the heliostat as a whole, thereby improving the wind resistance of the heliostat.

[0054] The embodiment specially sets the relative positions of the worm and worm wheel rotary reducer 2 and the height angle driving device 3, so that the projection of the center axis of the worm 23 and the straight line where the first end and the second end of the height angle driving device are located on the plane perpendicular to the azimuth rotation axis intersects (i.e. the first projection line 7 and the second projection line 8 intersect) when the reflector 52 is at any height angle. When the heliostat is subjected to a wind force, the connecting seat 4 and the reflector assembly 5 have a tendency to overturn away from or close to the height angle driving device 3, and since the first end and the second end of the height angle driving device 3 are connected to the connecting seat 4 and the reflector assembly 5 respectively, they can play a limiting role, thereby improving the anti-overturning ability of the heliostat. When the heliostat is subjected to a wind force, the connecting seat 4 and the reflector assembly 5 have a tendency to overturn to the two sides of the straight line where the first end and the second end of the height angle driving device are located, and since the worm 23 in the worm and worm wheel rotary reducer 2 and the structure around the worm 23 (such as the part of the shell wrapping the worm) play a role similar to a reinforcing rib, they can also improve the anti-overturning ability of the heliostat. Therefore, by specially setting the relative positions of the worm and worm wheel rotary reducer 2 and the height angle driving device 3, the anti-overturning ability of the heliostat in two directions is effectively improved.

[0055] Moreover, the greater the angle between the first projection line 7 and the second projection line 8, the greater the overturning force that the worm 23 and the worm containing cavity 27 part of the shell 24 can resist. Therefore, preferably, in the embodiment, the first projection line 7 and the second projection line 8 are perpendicular to each other. More preferably, the projection of the axis of the height angle driving device 3 on the end face of the worm wheel 22 bisects the worm wheel 22.

[0056] In the worm and gear rotary speed reducer 2, the worm 23 and the worm housing cavity 27 portion in the housing 24 are relatively protruding, and when the elevation angle of the heliostat is increased, interference with the reflector can occur. Therefore, in the present embodiment, if a plane passing through the center axis of the rotating shaft assembly 42 and perpendicular to the projection surface 6 is taken as a boundary surface, the elevation angle driving device 3 and the worm 23 are located on the same side of the boundary surface, as shown in Figure 2

[0057] The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments. Even if various changes are made to the present application, if the changes fall within the scope of the claims of the present application and equivalent technologies thereof, they are still within the scope of the present application.​

Claims

1. A heliostat, characterized in that, include: A mirror assembly used to reflect light; A worm gear reducer is used to drive the reflector assembly to adjust its azimuth angle; A connecting seat is fixedly disposed above the worm gear rotary reducer. The connecting seat includes a connecting seat body and a rotating shaft assembly disposed on the upper part of the connecting seat body. An elevation angle driving device includes a first end and a second end that can move closer to or further away from each other; The reflector assembly is connected to the rotating shaft assembly, and the reflector assembly can rotate around the central axis of the rotating shaft assembly. The first end of the elevation angle driving device is hinged to the lower part of the connecting seat body or the worm gear rotary reducer, and the second end of the elevation angle driving device is hinged to the reflector assembly. The elevation angle driving device is used to drive the reflector assembly to adjust the elevation angle. Using a plane perpendicular to the azimuth rotation axis as the projection plane, the projection of the central axis of the worm in the worm gear rotary reducer onto the projection plane is the first projection line. The projection of the straight line containing the first and second ends of the elevation angle driving device of the reflector assembly onto the projection plane at any elevation angle is the second projection line. The first projection line and the second projection line intersect.

2. The heliostat of claim 1, wherein, The first end and the second end of the elevation angle driving device can move away from or towards each other along a straight line. The projection of the straight line containing the first end and the second end of the elevation angle driving device onto the projection plane is a second projection line, and the first projection line intersects with the second projection line.

3. The heliostat of claim 1, wherein, The first projection line and the second projection line intersect perpendicularly.

4. The heliostat according to any of claims 1 to 3, characterized in that The plane passing through the central axis of the rotating shaft assembly and perpendicular to the projection plane serves as the interface, and the elevation angle drive device and the worm gear are located on the same side of the interface.

5. The heliostat according to claim 2 or 3, characterized in that, The projection of the straight line containing the first and second ends of the elevation angle drive device onto the end face of the worm gear bisects the worm gear.

6. The heliostat of claim 1 or 2, wherein, The elevation angle driving device is one of the following: an electric push rod, a telescopic hydraulic cylinder, a telescopic air cylinder, or a scissor jack.

7. The heliostat of claim 1, wherein, The worm gear rotary reducer includes a worm wheel, a worm, a drive unit, and a housing; The housing includes a worm gear cover and a worm housing cavity; the worm housing cavity is fixedly connected to the side of the worm gear cover; the worm gear cover covers the worm gear, the worm is housed in the worm housing cavity, and the worm is capable of rotating within the worm housing cavity; The worm gear and the worm are meshed with each other within the housing, and the worm gear and the housing can rotate relative to each other under the drive of the worm. The drive unit is fixed to the housing, and its output end is connected to the input end of the worm gear to drive the worm gear to rotate.

8. The heliostat of claim 7, wherein, The outer circumferential wall of the worm gear and the inner circumferential wall of the worm gear housing are connected by bearings, allowing the worm gear and the housing to rotate relative to each other.

9. The heliostat of claim 8, wherein, The worm gear rotary reducer also includes a base, which is fixedly connected to the bottom end face of the worm gear. The worm gear rotary reducer is connected to other components in the heliostat through the base.

10. The heliostat of claim 9, wherein, Further comprising a column, the worm gear rotary speed reducer is fixedly arranged at the top of the column through the base, and the axis of the column coincides with the axis of the worm.

11. The heliostat of claim 1, wherein, The axis of the hinge between the first end of the height angle driving device and the lower part of the connecting seat body or the worm gear rotary speed reducer, the axis of the hinge between the second end of the height angle driving device and the mirror assembly, and the central axis of the rotating shaft assembly are parallel to each other.

Images