WO2012119545A1

WO2012119545A1 - Heliostat device and corresponding heliostat system

Info

Publication number: WO2012119545A1
Application number: PCT/CN2012/072011
Authority: WO
Inventors: 陈煜达; 游思梁
Original assignee: 上海晶电新能源有限公司
Priority date: 2011-03-07
Filing date: 2012-03-06
Publication date: 2012-09-13
Also published as: CN102147518A

Abstract

A heliostat device comprises a mirror frame (1), a plurality of sub-mirrors (2), a first drive mechanism and a second drive mechanism. The mirror frame (1) is movably disposed on frame supports (3) by means of a rotatable shaft (11); the first drive mechanism is drivably connected to the rotatable shaft (11) and controls the rotation of mirror frame (1) on the rotatable shaft (11); each sub-mirror (2) is individually provided with a pitch axis shaft (21), the several pitch axis shafts (21) being parallel each to the others. Each sub-mirror (2) is movably disposed on mirror frame (1) by means of its pitch axis shaft (21); the second drive mechanism is drivably connected to the pitch axis shafts (21) and controls the synchronous rotation of the pitch axis shafts (21) of the several sub-mirrors (2) relative to the mirror frame (1), the rotatable shaft (11) being not parallel to the pitch axis shafts (21). Also disclosed is a heliostat system using the device. Use of a heliostat device having the present structure and of the corresponding heliostat system effectively addresses the problem of wind resistance and enables continuous, all-weather use of the heliostat while increasing reliability and enabling simple maintenance and calibration, while also effectively resolving the optical-efficiency problem of sub-mirrors over-shadowing or blocking each other, thus improving the optical efficiency of the heliostat and enabling a wider range of utilization.

Description

Heliostat device and corresponding heliostat system

The invention relates to the field of solar energy equipment, in particular to the technical field of solar light reflection and light distribution control equipment, and in particular to a heliostat device and a corresponding heliostat system.

Background technique

Since the 1950s, the former Soviet Union designed and built the world's first small tower solar thermal power generation test unit and the first 1600 French tower solar thermal power generation system with power of 100 kW in the Pyrenees, 1900. Since the beginning, the United States, Italy, France, Spain, Japan, Australia, Germany, Israel and other countries have successively established various types of experimental demonstration devices and commercial operation devices, which promoted the development and commercialization of solar thermal power generation technology. The existing solar thermal power generation systems in the world mainly include three basic types of trough line focusing systems, tower systems and dish systems.

Heliostats are very important equipment in the initial stages of energy conversion in tower solar thermal power systems. Thousands of heliostats are typically used in tower systems to continuously track solar radiant energy through separate control systems and focus the energy on the heat sink at the top of the tower, which is then utilized in the form of thermal energy. Therefore, the design of heliostats is one of the important aspects of tower solar thermal power generation system design, which is the basis for reducing power generation costs and commercializing solar thermal power generation.

The commonly used single-column heliostats usually consist of a bracket, a transmission system, a mirror and a control system. The bracket is the supporting part of the entire heliostat, and the components are stably connected together. The mirror is fixed on the bracket, and the incident light of the sun is reflected by the transmission system to the heat absorber of the heat absorption tower. Most manufacturers now use the ultra-white glass silver mirror. The control system uses the azimuth and pitch dual-axis drive to control the heliostat to automatically track the sun.

At present, the heliostat tracking device of the solar tower type thermal power generation has different structural forms. For example, Chinese Patent Application No. 200510039114.8 discloses a heliostat device, which includes a plane mirror group, an azimuth adjustment mechanism, and an elevation angle adjustment mechanism. Positioning sensor and control circuit, wherein the axes of the horizontal axis and the vertical axis are in the same plane and intersect perpendicularly, and the collective center of the plane lens group is located at the intersection of the two axes, and the center line of the positioning sensor is connected with the intersection of the two axes and the center point of the projection target Lines coincide. Such a heliostat device has a large volume, is suitable for a truss type heliostat bracket device, and has the disadvantages of low rotation control accuracy, and is not suitable for the chasing movement of a small heliostat.

Chinese patent application 200810007862.1 discloses a heliostat device, which adopts azimuth plus elevation tracking mode or spin plus elevation tracking mode; including a flat mirror, a frame that is small enough to be formed at one time, an adjustment mechanism, and is installed in the center tower and the date Positioning guide tubes, positioning sensors, and control systems between the mirror devices. This type of device is limited in size due to the use of a small frame that is molded at one time.定Using elevation tracking or spin plus elevation tracking to make heliostats The adjustment angle should not be too large, the flexibility is not high, and the range of the heliostat is limited, which is unfavorable for the cleaning and maintenance of the heliostat. Chinese patent application 201010150049.7 discloses a solar heliostat transmission device, which comprises a transmission box body and a transmission box base. The transmission box body is coaxially mounted on the transmission box base, and the transmission box body is installed through the box body coupling shaft and the thrust bearing. On the base of the transmission case, an azimuth transmission system is installed on the base of the transmission case, and a pitch transmission system is arranged on the transmission case body. The vertical rotary motion and the horizontal rotary motion of the device are both meshed and driven by the pitch cone mast and the pitch cone wheel. To achieve high-precision transmission, the precision of the manufacturing and manufacturing of the device is high, and it is difficult to manufacture.

In summary, most of the existing heliostats are single-sided frames, that is, one frame drives a mirror, which often brings about a large wind resistance problem. In order to achieve higher efficiency, single-sided mirrors, as well as frames and drive mechanisms tend to be large, large-sized mirrors will produce large mirror distortion errors, and large drive mechanisms also make the cost high. The azimuth angle of the existing heliostats + the pitch angle/height angle rotation mode has a large mechanical hard limit, which is not conducive to the protection of the mirror, and also causes a certain runaway period in actual operation. And every square meter of mirror requires more control, more transmission units, lower reliability, and higher cost of calibration and maintenance. Summary of the invention

The object of the present invention is to overcome the above-mentioned shortcomings in the prior art, and to provide an accurate tracking of the change in the orientation of the sun, reflection of sunlight onto the target, effective improvement of wind resistance, simple and practical structure, and high reliability. The maintenance and calibration is quick and convenient, the work performance is stable and reliable, and the heliostat device and the corresponding heliostat system are widely applicable.

In order to achieve the above object, the heliostat device and the corresponding heliostat system of the present invention have the following configuration: The heliostat device is characterized in that the heliostat device comprises a frame, a plurality of sub-mirrors, a first transmission mechanism and a second transmission mechanism, the frame has a rolling shaft, and the frame is movably disposed on the frame bracket through the rolling shaft, and the first transmission mechanism is coupled to the rolling shaft and Controlling the frame to rotate around the rolling axis; each of the sub-mirrors has a pitch axis, the respective pitch axes are parallel to each other, and the respective sub-mirrors are disposed in the frame through the corresponding pitch axis activities. The second transmission mechanism is coupled to each of the pitch axes and controls each of the sub-mirrors to rotate synchronously with respect to the frame relative to the pitch axis, the roll axis being non-parallel to each of the pitch axes.

The rolling axis in the heliostat device and the respective pitch axes may be in the same plane, and the rolling axis and each pitch axis are perpendicular to each other or at an angle to each other; or the rolling axis and each pitch axis may or may not be In the same plane, and the rolling axis is parallel to the imaginary plane formed by the respective pitch axes, the projection of the rolling axis on the imaginary plane is perpendicular to the respective pitch axes, or at an angle to each pitch axis.

The rolling axis in the heliostat device is horizontal. The sub-mirrors in the heliostat device are spaced apart from each other.

The second transmission mechanism in the heliostat device may include a driven crank, a deceleration driving device, a driving crank and a connecting shaft disposed on the respective pitch axes, and the driving crank passes through the connected 4 The shaft is coupled to each of the driven cranks, and the deceleration driving device is coupled to the driving end of the driving crank, and drives the driving crank to swing synchronously with each of the driven cranks.

The driven crank in the heliostat device is disposed at an end or a middle portion of the pitch axis.

The deceleration driving device in the heliostat device comprises a motor, a speed reducing mechanism and a timing pulley, and the motor is sequentially connected to the driving end of the driving crank through a speed reducing mechanism and a timing pulley.

The driven crank in the heliostat device is fixedly coupled to the corresponding pitch axis by an angle adjustment sleeve.

The second transmission mechanism in the heliostat device may also include a timing pulley, a snubber connection disposed on each of the pitch axes, and drive the respective timing pulleys to rotate synchronously.

A timing pulley in the heliostat device is disposed at an end of the pitch axis.

The deceleration driving device in the heliostat device comprises a motor, a speed reducing mechanism and a synchronous driving wheel, wherein the motor is connected to the synchronous driving wheel through a speed reduction mechanism, and the synchronous driving wheel can pass the synchronization The drive belt is connected to each of the timing pulleys.

The synchronous drive belt in the heliostat device can be a single-sided timing belt, and the drive side drive of the single-sided timing belt is coupled to the synchronous drive wheel and the respective timing pulleys.

The synchronous transmission belt in the heliostat device can also be a double-sided timing belt, and the double-sided timing belt alternately bypasses the synchronous driving wheel and each synchronous pulley, and the two transmissions of the double-sided timing belt The side alternately drives the synchronous drive wheel and the respective timing pulleys.

The synchronous belt in the heliostat device may further include a first timing belt and a plurality of second timing belts, wherein the first timing belt drives the synchronous driving wheel and the at least one timing belt, and each of the The second timing belt is driven to connect two adjacent timing pulleys.

The first transmission mechanism in the heliostat device may include a flange bearing structure fixedly disposed on the frame bracket and a deceleration driving device, and the decelerating driving device passes through the flange bearing structure and the The rolling shaft phase drives the connection and drives the rolling shaft to rotate.

The flange bearing structure of the heliostat device includes a support plate and a flange, and the flange is fixedly disposed on the frame bracket by the support plate, the rolling shaft and the flange The phase is connected. The deceleration driving device in the heliostat device comprises a motor, a speed reducing mechanism and a transmission wheel, and the motor is in turn connected with the flange bearing structure through the speed reduction mechanism and the transmission wheel.

The drive wheel in the heliostat device is a synchronous pulley or a wire wheel.

The first transmission mechanism in the heliostat device may also include an articulated structure and a telescopic drive device fixedly disposed on the frame bracket, the roller shaft is hinged with the hinge structure, and the telescopic drive The device is connected between the frame and the frame holder, and drives the frame to rotate around the rolling axis.

The telescopic drive device in the heliostat device is a hydraulic telescopic cylinder or a ball screw telescopic mechanism.

The planes of all the sub-mirrors in the frame in the heliostat device may be parallel to each other; or the frame may be divided into several regions along the extending direction of the rolling axis, and the planes of the sub-mirrors in each region are parallel to each other, different There is an angular difference between the planes of the sub-mirrors of the region, and the mirror surface composed of all the sub-mirrors of the heliostat device has a concave shape.

A heliostat system using the above device, comprising a reflective target object disposed in the mirror field and a plurality of heliostat devices disposed around the heat absorption tower, the main feature of which is that each of the said The extending direction of the rolling axis of the frame in the mirror device is perpendicular to the plane defined by the reflecting target object and the center of the corresponding heliostat device, or each sub-mirror in each of the heliostat devices The pitch axes extend in a direction parallel to the plane defined by the reflective target object and the center of the corresponding heliostat device.

The reflective target object in the heliostat system may be an endothermic tower, a secondary reflection system, or other form of heliostat reflective target.

The heliostat device and the corresponding heliostat system of the invention are used, and since a plurality of sub-mirrors are integrated into a larger frame, the sub-mirrors are similarly installed with louvers, and the sub-mirror width is small. Therefore, the wind resistance problem is effectively improved, and a group of heliostat frames can be used to uniformly use the driving mechanism, which not only reduces the number of driving mechanisms, but also saves a large number of mechanical hard limits through accurate measurement and design. The heliostats work continuously all day, while improving reliability, maintenance and correction are simpler; the precise synchronous rotation of multiple sub-mirrors is realized by the transmission mechanism of the timing belt; through the rigidly rigid sub-mirror axes and their parallel arrangement, The problem of the deformation of the rotating shaft of the large-sized sub-mirror is improved. Moreover, the present invention effectively solves the shadow/occlusion optics between the sub-mirrors by means of the parallel arrangement of the strip-shaped sub-mirrors and the special positional relationship between the rotating shaft and the heat-absorbing tower. The problem of efficiency significantly reduces the cost of manufacturing and maintenance of heliostat per unit area, and effectively improves the optical efficiency of heliostats, simplifying the present Heliostats complex correction schemes, the scope is more extensive, and laid a solid foundation for further development and application of new energy. DRAWINGS Fig. 1 is a schematic view showing the overall structure of a heliostat device of the present invention.

2a and 2b are partial structural views showing a first embodiment of a second transmission mechanism of the heliostat device of the present invention. 3a, 3b, and 3c are schematic views showing the structure of a second embodiment of the second transmission mechanism of the heliostat device of the present invention. Figure 3d is a schematic view showing the structure of a third embodiment of the second transmission mechanism of the heliostat device of the present invention.

4 is a partial structural schematic view of a first transmission mechanism of the heliostat device of the present invention.

FIG. 5 is a schematic diagram showing the setting of the angular difference of the sub-areas of each sub-mirror in the heliostat device of the present invention.

Figure 6 is a schematic view showing the positional relationship between the heat absorbing tower and the heliostat device in the heliostat system of the present invention.

Fig. 7 is a schematic view showing the support structure of the frame three-arc guide rail of the heliostat device of the present invention.

8 is a schematic view showing a frame-shaped curved guide rail and a two-column support structure of the heliostat device of the present invention. detailed description

In order to more clearly understand the technical content of the present invention, the following embodiments are specifically described.

First, the explanation of the technical terms involved in the present invention will be introduced:

• Heliostat: Equipment for reflecting sunlight used in solar thermal power generation

• Submirror: A small mirror in a heliostat unit

• Roll angle: the angle at which the entire heliostat unit frame rotates

• Rolling axis: the axis of rotation of the entire heliostat unit frame

• Bracket: Support structure between the two ends of the heliostat unit frame rolling shaft to the ground

• Pitch angle: The angle at which the sub mirror rotates relative to the heliostat frame

• Pitch axis: Rotation axis of each sub-mirror

• Angle difference: fixed pitch angle difference preset between sub-mirrors

The technical problems mainly solved by the present invention mainly include the following points:

1 heliostat optical efficiency problem of roll angle/pitch angle rotation mode;

2 wind resistance problems of large size heliostats;

3 accurate installation and correction of heliostats;

4 precise mirror rotation problems of multiple sub-mirrors;

5 large-size sub-mirror deformation problem of the shaft.

Referring to FIG. 1, the heliostat device includes a frame 1, a plurality of sub-mirrors 2, a first transmission mechanism and a second transmission mechanism. The frame 1 has a rolling shaft 11 and the frame 1 passes through The scroll shaft 11 is set to be movable in the frame The first transmission mechanism is drivingly connected to the rolling shaft 11 and controlling the frame 1 to rotate around the rolling shaft 11; each of the sub-mirrors 2 has a pitch axis 21, Each of the pitch axes 21 is parallel to each other, and each of the sub-mirrors 2 is movably disposed in the lens frame 1 through a corresponding pitch axis 21, and the second transmission mechanism is drivingly connected to each of the pitch axes 21 and controls the respective sub-mirrors 2 to correspond to each other. The pitch axis 21 rotates synchronously with respect to the frame 1 , and in order to realize the biaxial tracking, it is impossible for the two axes of the heliostat to be parallel, and the roll axis 11 and each of the pitch axes 21 are not parallel.

Wherein, the rolling shaft 11 and each pitch axis 21 may be in the same plane, and the rolling axis 11 and each pitch axis 21 are perpendicular to each other or at an angle to each other; or the rolling axis 11 and each pitch axis 21 may not be in the same plane, and the rolling axis 11 is parallel to the imaginary plane formed by the respective pitch axes 21, the projection of the rolling axis 11 on the imaginary plane is perpendicular to the respective pitch axes 21, or The pitch axis 21 is at an angle.

Wherein, the rolling shaft 11 in the heliostat device is in a horizontal direction, and the respective sub-mirrors 2 are normally spaced apart from each other, of course, without affecting the free rotation of the sub-mirror 2 with respect to the pitch axis 21, The respective sub-mirrors 2 can be arranged to overlap each other.

Meanwhile, referring to FIGS. 2a and 2b, as a first embodiment of the present invention, the second transmission mechanism in the heliostat device may include a deceleration driving device 5, a driving crank 6, a connecting rod 7, and a setting The driven cranks 4 on the respective pitch axes 21, the drive cranks 6 are axially coupled to the respective driven cranks 4 via the connecting rods 7, the deceleration driving device 5 and the driving crank 6 The driving ends are connected, and the driving crank 6 is driven to oscillate in synchronization with the respective driven cranks 4.

Referring to FIG. 2a, the driven crank 4 in the heliostat device can be disposed at the end of the pitch axis 21, and referring to FIG. 2b, the driven crank 4 in the heliostat device It can also be arranged in the middle of the pitch axis 21, wherein the driven crank 4 in the heliostat device is fixedly connected to the corresponding pitch axis 21 via the angle adjustment sleeve 41.

At the same time, the deceleration driving device 5 in the heliostat device comprises a motor, a speed reducing mechanism and a timing pulley, and the motor is in turn connected to the driving end of the driving crank 6 through a speed reducing mechanism and a timing pulley.

In actual use, as a crank transmission scheme used in the present invention, a driving crank is mounted at one end (or the center) of the mirror shaft, and a timing pulley is mounted at the output shaft end of the speed reducing mechanism, and is transmitted to the driving crank through the timing belt. A connecting rod connects all the driven cranks and drive cranks. Through the connecting rod and the crank transmission, the purpose of simultaneously controlling the movement of all the sub-mirrors is simultaneously achieved. Obviously, the timing pulley and the timing belt can be eliminated, and the output shaft end of the speed reduction mechanism can directly connect the connecting rod through the driving crank.

The advantage of this transmission structure is that it can achieve a sub-mirror pitch angle of 360. The rotation is convenient and the installation is convenient.

At the same time, in order to solve the adjustment problem, an angle adjustment sleeve 41 may be installed at each pitch axis end to facilitate adjustment of the relative angle between each pitch axis and the mirror surface. At the same time, the processing difficulty is greatly reduced. Referring to FIGS. 3a, 3b and 3c, as a second embodiment of the present invention, the second transmission mechanism in the heliostat device may also include a timing pulley disposed on each of the pitch axes 21 22. The deceleration driving device and the synchronous transmission belt 23, wherein the deceleration driving device is drivingly connected to each of the timing pulleys 22 through the synchronous transmission belt 23, and drives the respective timing pulleys 22 to rotate synchronously.

The timing pulley 22 in the heliostat device may be disposed at an end or a middle portion of the pitch axis 21; the deceleration driving device includes a motor, a speed reduction mechanism, and a synchronous driving wheel 24, and the motor passes The speed reduction mechanism is in driving connection with the synchronous drive wheel 24, and the synchronous drive wheel 24 can be drivingly connected to each of the synchronous pulleys 22 via the synchronous drive belt 23.

Please refer to FIG. 3a, wherein the synchronous belt 23 in the heliostat device can be a single-sided timing belt, and the transmission side of the single-sided timing belt is connected to the synchronous driving wheel 24 and each timing belt. Wheel 22.

Referring to FIG. 3b, the synchronous belt 23 in the heliostat device can also be a double-sided timing belt. The double-sided timing belt alternately bypasses the synchronous driving wheel 24 and each synchronous pulley. 22, and the two transmission sides of the double-sided timing belt alternately drive the synchronous driving wheel 24 and the respective timing pulleys 22.

Referring to FIG. 3c, the synchronous belt in the heliostat device may further include a first timing belt 231 and a plurality of second timing belts 232. The first timing belt 231 is connected to the synchronous driving wheel. 24 and at least one timing pulley 22, each of the second timing belts 232 is drivingly connected to two adjacent timing pulleys 22.

Referring to FIG. 3d again, in the heliostat transmission, the timing belt and the timing pulley are replaced by a steel cable 233 and a wire wheel 234. The steel cable 233 is wound around the wire wheel 234 in two directions: "left-handed" and "right-handed". The wire 233 is tensioned by the tension of the tension member 235, and the wire 233 is fixed to the middle of the wire wheel 234 by the fastener 236.

The wire transmission device of the steel cable 233 and the wire wheel 234 is a type of winding transmission device, and the non-ductile steel cable is used as the winding element, and the transmission precision is high, the torque is large, and the structure is simple; the use can be achieved in the invention. High precision non-return drive.

In actual use, as the timing belt transmission scheme of the present invention, the timing belt transmission structure is provided with a timing pulley at each sub-mirror end, and the synchronous belts are connected to each other to achieve the purpose of synchronous transmission. Timing belts are easy to install and adjustable, and most parts can be used with existing standard parts. However, under certain special environmental conditions, the material aging problem of the timing belt cannot be ignored.

Due to the particularity of the timing belt drive, the timing belt connection method is also various, and the present invention can provide the following three different connection schemes:

• Connect a timing belt between every 2 pulleys • Connect multiple pulleys from a single-sided timing belt

• Connect multiple pulleys with one double-sided timing belt (up and down around each pulley)

Referring to FIG. 4, the first transmission mechanism in the heliostat device may include a flange bearing structure and a deceleration driving device 8 fixedly disposed on the frame bracket 3, and the deceleration driving device 8 passes The flange bearing structure is drivingly coupled to the rolling shaft 11 and drives the rolling shaft 11 to rotate.

The flange bearing structure of the heliostat device includes a support plate 81 and a flange 82, and the flange 82 is fixedly disposed on the frame bracket 3 through the support plate 81, and the roller The shaft 11 is axially coupled to the flange 82.

At the same time, the deceleration driving device 8 in the heliostat device comprises a motor, a speed reducing mechanism and a transmission wheel, and the motor is in turn connected to the flange bearing structure through the speed reduction mechanism and the transmission wheel.

The drive wheel in the heliostat device can be a timing pulley or a wire wheel.

In addition, the first transmission mechanism in the heliostat device may also include an articulated structure and a telescopic driving device fixedly disposed on the frame bracket 3, and the rolling shaft 11 is hinged to the hinge structure. The telescopic driving device is connected between the frame 1 and the frame holder 3, and drives the frame 1 to rotate around the rolling shaft 11.

Wherein, the telescopic driving device in the heliostat device may be a hydraulic telescopic cylinder or a ball screw telescopic mechanism.

In actual use, as the mechanical transmission scheme of the bearing of the present invention, a support plate and a flange are mounted on both sides of the unit frame, and a shaft is welded in the flange, and is fixed to the two brackets by the heavy-duty vertical seat bearing. At the same time, the timing pulley/steel wheel is connected to the flange end. The rotation of the roller shaft 11 is controlled by the direct connection of the speed reduction mechanism.

As the hydraulic rod/ball screw drive scheme of the present invention, one side of the frame can be hinged to the bracket, and the other side is connected to the hydraulic rod/ball screw, and the rotation of the roll angle is completed by the expansion and contraction of the hydraulic rod/screw.

Wherein, the planes of all the sub-mirrors 2 in the frame 1 of the heliostat device can be parallel to each other; or as shown in FIG. 5, the following manner can also be used: that is, the frame 1 along the heliostat device The extending direction of the rolling shaft 11 is divided into a plurality of regions, including the region 1, the region 2, and the region 3. The planes of the sub-mirrors 2 in each region are parallel to each other, and there is an angular difference between the planes of the sub-mirrors 2 in different regions. And the mirror surface composed of all the sub-mirrors of the heliostat device has a concave shape.

Referring again to Figure 7, the entire frame 1 in the heliostat device can be supported by three curved rails 237.

Referring to Fig. 8, the entire frame 1 of the heliostat device can be centrally supported by a curved guide rail 237, and the frame frame 1 is supported by both frame posts 3 at both ends.

In actual use, the relative positions of the frame rolling shaft and the heat absorbing tower in the present invention are set as follows, and the installation of each heliostat in the mirror field must ensure that the frame rolling axis and the mirror center-heat absorbing tower plane are perpendicular to each other. And the roll axis is horizontal. Please Referring to FIG. 6, the heliostat system of the above-described heliostat device of the present invention includes a reflective target object 91 disposed in the mirror field 9 and a plurality of heliostat devices disposed around the reflective target object. 92, wherein the extending direction of the rolling shaft 11 of the frame 1 in each of the heliostat devices 92 is a plane 94 determined by the reflection target object 91 and the center 93 of the corresponding heliostat device 92. Vertically, or the direction of extension of the pitch axis 21 of each of the sub-mirrors 2 in each of the heliostat devices 92 is determined by the reflection target object 91 and the center 93 of the corresponding heliostat device 92. The planes 94 are parallel.

Meanwhile, the reflective target object 91 in the heliostat system may be an endothermic tower, a secondary reflection system, or other forms of heliostat reflection targets.

In actual use, the sub-mirror 2 in the frame 1 of the present invention sets the angular difference in the sub-area, that is, the sub-mirrors 2 in each region are parallel to each other, and a certain angular difference is set between the sub-mirrors 2 in different regions. The heliostats are generally concavely polyhedral, thereby producing the desired concentrating effect and reducing the loss of light energy on the heat sink.

The above-mentioned heliostat device and the corresponding heliostat system are used. Since the plurality of sub-mirrors 2 are integrated into the larger frame 1, the sub-mirrors 2 are mounted in a manner similar to the blinds, and the sub-mirrors 2 The smaller width effectively improves the wind resistance problem, and the uniform driving mechanism of a set of heliostat frames can be realized, which reduces the number of driving mechanisms and eliminates a large number of mechanical hard limits by precise measurement and design. The all-weather continuous operation of the heliostat can be realized, and the reliability is improved, and the maintenance and correction are simpler. The precise synchronous rotation of the plurality of sub-mirrors is realized by the transmission mechanism of the timing belt; the sub-mirror axis with better rigidity and its parallel Arrangement, the problem of the deformation of the shaft of the large-sized sub-mirror is improved; not only that, the invention also effectively solves the shadow between the sub-mirrors by means of the parallel arrangement of the strip-shaped sub-mirrors and the special positional relationship between the rolling shaft and the heat-absorbing tower. / occlusion of optical efficiency, significantly reducing the cost of manufacturing and maintenance of heliostat per unit area, and effectively improving the optical efficiency of heliostats Simplify complex correction schemes existing heliostat, the scope is more extensive, and laid a solid foundation for further development and application of new energy.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and changes can be made without departing from the spirit and scope of the invention. Accordingly, the specification and figures are to be regarded as illustrative and not limiting.

Claims

Rights request

A heliostat device, characterized in that the heliostat device comprises a frame, a plurality of sub-mirrors, a first transmission mechanism and a second transmission mechanism, the frame has a rolling axis, and the frame passes The rolling shaft is movably disposed on the frame bracket, the first transmission mechanism is drivingly connected to the rolling shaft and controls the frame to rotate around the rolling axis; each of the sub-mirrors has a pitch axis, Each of the pitch axes is parallel to each other, and each of the sub-mirrors is movably disposed in the frame through a corresponding pitch axis, and the second transmission mechanism is coupled to each pitch axis and controls each sub-mirror to a corresponding pitch axis. The rolling axis is non-parallel to each of the pitch axes with respect to the synchronous rotation of the frame.

2 . The heliostat device according to claim 1 , wherein the rolling axis is in the same plane as each pitch axis, and the rolling axis and each pitch axis are perpendicular to each other or at an angle to each other; Or the rolling axis is not in the same plane as the respective pitch axes, and the rolling axis is parallel to the imaginary plane formed by the respective pitch axes, and the projection of the rolling axis on the imaginary plane is perpendicular to the respective pitch axes. Or at an angle to each pitch axis.

3. The heliostat device according to claim 1, wherein the rolling axis is in a horizontal direction.

A heliostat apparatus according to claim 1, wherein said respective sub-mirrors are spaced apart from each other.

The heliostat device according to any one of claims 1 to 4, wherein the second transmission mechanism includes a deceleration driving device, a driving crank, a connecting rod, and respective pitch axes provided a driven crank on which the drive crank is axially coupled to each of the driven cranks, the deceleration driving device being coupled to the driving end of the driving crank, and driving the driving The crank swings synchronously with each of the driven cranks.

The heliostat device according to claim 5, wherein the driven crank is disposed at an end or a middle portion of the pitch axis.

7. The heliostat device according to claim 5, wherein the deceleration driving device comprises a motor, a speed reducing mechanism and a timing pulley, wherein the motor sequentially passes through a speed reduction mechanism, a timing pulley and the The drive end of the drive crank is connected to the drive.

The heliostat device according to claim 5, wherein the driven crank is fixedly coupled to the corresponding pitch axis by an angle adjusting sleeve.

The heliostat device according to any one of claims 1 to 4, wherein the second transmission mechanism includes a timing pulley, a deceleration driving device, and a deceleration driving device provided on each of the pitch axes The synchronous drive belt is connected to each of the synchronous pulleys through the synchronous transmission belt, and drives the respective synchronous pulleys to rotate synchronously.

10. The heliostat device according to claim 9, wherein the timing pulley is disposed at the pitch The end of the tilt shaft.

11. The heliostat device according to claim 9, wherein the deceleration driving device comprises a motor, a speed reducing mechanism and a synchronous driving wheel, and the motor is driven by the speed reduction mechanism and the synchronous driving wheel The synchronous driving wheel is connected to each of the synchronous pulleys through the synchronous transmission belt.

The heliostat device according to claim 11, wherein the synchronous transmission belt is a single-sided timing belt, and the transmission side of the single-sided timing belt is connected to the synchronous driving wheel and each Pulley.

The heliostat device according to claim 11, wherein the synchronous transmission belt is a double-sided timing belt, and the double-sided timing belt alternately bypasses the synchronous driving wheel and each synchronization A pulley, and the two transmission sides of the double-sided timing belt alternately drive the synchronous drive wheel and each of the timing pulleys.

14. The heliostat device according to claim 9, wherein the synchronous belt includes a first timing belt and a plurality of second timing belts, and the first timing belt drives the synchronous drive And a wheel and at least one timing pulley, wherein each of the second timing belts is driven to connect two adjacent timing pulleys.

The heliostat device according to any one of claims 1 to 4, wherein the first transmission mechanism comprises a flange bearing structure and a deceleration driving device fixedly disposed on the frame bracket The deceleration driving device is drivingly connected to the rolling shaft through the flange bearing structure, and drives the rolling shaft to rotate.

The heliostat device according to claim 15, wherein the flange bearing structure comprises a support plate and a flange, and the flange is fixedly disposed on the frame by the support plate On the bracket, the rolling shaft is axially coupled to the flange.

The heliostat device according to claim 15, wherein the deceleration driving device comprises a motor, a speed reducing mechanism and a transmission wheel, and the motor passes through the speed reduction mechanism and the transmission wheel in sequence The flange bearing structure is phase driven.

The heliostat device according to claim 17, wherein the transmission wheel is a timing pulley or a steel wire wheel.

The heliostat device according to any one of claims 1 to 4, wherein the first transmission mechanism comprises an articulated structure and a telescopic driving device fixedly disposed on the frame bracket, The rolling shaft is hinged to the hinge structure, and the telescopic driving device is connected between the frame and the frame holder, and drives the frame to rotate around the rolling axis.

The heliostat device according to claim 19, wherein the telescopic drive device is a hydraulic telescopic cylinder or a ball screw telescopic mechanism.

The heliostat device according to any one of claims 1 to 4, wherein all of the sub-mirrors in the frame are in parallel with each other; or the frame is along the rolling axis The extending direction is divided into several regions, and the planes of the sub-mirrors in each region are parallel to each other, and there is an angular difference between the planes of the sub-mirrors in different regions, and the mirror surface composed of all the sub-mirrors of the heliostat device has a concave shape as a whole.

22. A heliostat system using the apparatus of claim 1 comprising a reflective target object disposed in the mirror field and a plurality of heliostat devices disposed about the reflective target object, wherein The extending direction of the rolling axis of the frame in each of the heliostat devices is perpendicular to a plane defined by the center of the reflecting target object and the corresponding heliostat device, or each of the heliostats The pitch axes of the respective sub-mirrors in the device extend in a direction parallel to the plane defined by the reflective target object and the center of the corresponding heliostat device.

23. The heliostat system of claim 22, wherein the reflective target object is an endothermic tower, a secondary reflection system, or other form of heliostat reflective target.