An addable heliostat height self-adaptive adjusting device

Abstract

The utility model relates to tower type photo -thermal power generation equipment technical field, concretely is a kind of height self-adaptive adjusting device of heliostat that can add, it include: from top to bottom sequentially installed top flange, inner sleeve, outer sleeve, bottom main flange, bottom auxiliary flange, top flange is threadedly connected with 8 groups of bolts, and top flange is rigidly connected heliostat body base by 8 groups of bolts, outer sleeve is sleeved in inner sleeve outside, and outer sleeve bottom is equipped with bottom main flange and bottom auxiliary flange, and bottom auxiliary flange is threadedly connected with 6 groups of reinforcing bolts, and bottom auxiliary flange is fixedly bonded with bottom main flange by 6 groups of reinforcing bolts.The utility model can reduce shielding optimization heliostat condensing efficiency by the layout design of height gradient, while guaranteeing the height accurate regulation and structural stability of heliostat.

Description

Technical Field

[0001] This utility model relates to the technical field of tower-type solar thermal power generation equipment, specifically to an addable heliostat height adaptive adjustment device. Background Technology

[0002] Tower-type concentrated solar power (CSP) technology uses numerous heliostats to reflect sunlight onto receivers at the top of an absorber tower, converting solar energy into heat and ultimately generating electricity. As the core concentrating equipment, the tracking accuracy, stability, and array efficiency of the heliostats directly impact the power plant's output. To improve solar resource utilization, power plants often need to increase the surface area of ​​the heliostats or increase the array density, but this can lead to mutual shading between heliostats at low solar altitude angles, reducing array efficiency. Since many heliostats in CSP plants need to operate long-term in open, windy environments, their support structure, connection reliability, wind vibration resistance, and ease of maintenance are critical engineering issues. Furthermore, increasing the installation height without altering the existing heliostat structure, and ensuring precise adjustments to avoid shading while complying with regulations or terrain requirements, presents new challenges to the mechanical strength, dynamic stability, and control compatibility of add-on heightening modules.

[0003] Existing heliostats typically feature fixed-height pillar structures, making it impossible to optimize the incident angle by adjusting the mirror height for different solar altitude angles or seasons, potentially leading to low focusing efficiency. Furthermore, in array layouts, fixed heights cannot be adjusted for low solar altitude angles at dawn and dusk or irregular terrain to reduce mutual shading, thus decreasing effective illumination time and output. If heightening is necessary, a common practice is to connect an additional pillar using a flange. While simple, this approach has significant limitations: (1) The existing heliostats are mostly designed with a fixed height for their support structure, which cannot optimize the incident angle by changing the mirror height at different solar altitude angles or in different seasons, which may result in low light-gathering efficiency. In the array layout, the fixed height cannot be adjusted for low solar altitude angles in the morning and evening or irregular terrain to reduce mutual shading, thereby reducing the effective illumination time and output. The height is not adjustable, which cannot cope with the fine-tuning required for foundation settlement or mirror field optimization.

[0004] (2) Introducing stability risks: After the height is increased, the center of gravity of the overall structure shifts upward, the wind load moment increases, the wind resistance and overturning resistance decrease, and stress concentration points are easily formed at the flange connection, especially around the bolt holes in the multi-segment structure. Under cyclic loads such as wind vibration and drive start-stop, fatigue damage is likely to occur, affecting long-term safety.

[0005] (3) Lack of intelligent integration. The design of the pure mechanical structure cannot be connected to the existing control system to achieve precise monitoring and adaptive adjustment. It cannot provide feedback on the stress and actual height of the heliostat, nor can it respond to the height adjustment command of the system. The level of intelligence is low. Utility Model Content

[0006] The purpose of this invention is to provide an addable heliostat height adaptive adjustment device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An addable heliostat height adaptive adjustment device, comprising: The components installed from top to bottom are: a top flange, an inner sleeve, an outer sleeve, a bottom main flange, and a bottom secondary flange. The top flange is threaded with eight sets of bolts and is rigidly connected to the heliostat body base via these eight sets of bolts. The outer sleeve is fitted over the inner sleeve, and the bottom of the outer sleeve has a bottom main flange and a bottom secondary flange. The bottom secondary flange is threaded with six sets of reinforcing bolts and is fixed to the bottom main flange via these six sets of reinforcing bolts. The bottom main flange is connected to the original heliostat column via eight sets of bolts and a flange, and an elastic buffer pad is installed between the bottom main flange and the original heliostat column.

[0008] Preferably, the upper end of the inner sleeve is fixedly connected to the top flange, and a ball nut is provided inside the inner sleeve.

[0009] Preferably, the inner sleeve and the outer sleeve are hollow cylinders, and a ball screw is connected inside them. The ball nut is adapted to the ball screw, and a plurality of balls are provided inside the ball nut and between the ball screw and the ball nut.

[0010] Preferably, it further includes: Adjustable transmission assembly, the adjustable transmission assembly comprising: The components include a ball screw, a guide shaft, and a permanent magnet synchronous servo motor, with the permanent magnet synchronous servo motor fixed to the bottom of the outer sleeve. The lower end of the ball screw is fixed in the bearing seat at the bottom of the outer sleeve by a double-row angular contact ball bearing, and the upper end is inserted into a ball nut and connected to the output end of the permanent magnet synchronous servo motor.

[0011] Preferably, the guide shaft is arranged parallel to the ball screw and connected to the ball nut.

[0012] Preferably, it further includes: The sensing component includes: Inclination sensor and grating ruler, wherein the inclination sensor is fixed above the top flange by a bracket, and the signal cable of the inclination sensor is threaded through the pre-reserved wiring hole in the outer sleeve and connected to the control unit; The grating ruler is located between the inner sleeve and the outer sleeve and is used to collect the height data of the inner sleeve.

[0013] Preferably, it further includes: An embedded PLC is fixed to the outside of the outer sleeve and is electrically connected to a permanent magnet synchronous servo motor, an tilt sensor, and a grating ruler.

[0014] Preferably, the bottom of the outer sleeve is also provided with four triangular ribs. One end of the triangular rib is connected to the rib seat by bolts, and the other end is embedded in the T-groove of the inner wall of the outer sleeve to achieve detachable positioning.

[0015] Preferably, the inner sleeve, outer sleeve, bottom main flange, and bottom secondary flange are all made of Q355B steel and have been hot-dip galvanized for corrosion protection.

[0016] Preferably, a dustproof telescopic cover is also fitted on the outside of the ball screw.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This invention addresses the problems of existing heliostats having low height and non-adjustable height by providing an addable and detachable height adaptive adjustment device and its control scheme. Through a height gradient layout design, it can reduce obstruction and optimize the light-gathering efficiency of the heliostat, while ensuring precise height adjustment and structural stability of the heliostat.

[0018] This utility model adopts a three-in-one design of "ball screw drive + servo motor drive + grating ruler feedback", combined with embedded PLC and the original heliostat control system, to realize "program preset + real-time feedback" hybrid control, which can complete the height adjustment from 0-1000mm with an accuracy of ±0.01mm.

[0019] This invention can improve the light-gathering efficiency of the mirror field throughout the year by dynamically optimizing the shading distribution through a highly gradient precision layout design.

[0020] This utility model's stability enhancement structure employs a three-dimensional design of "double flange transition + triangular rib plate + central ring rib + elastic buffer pad," combined with positioning pins and tilt sensors to ensure coaxiality and perpendicularity, thereby improving the overall bending stiffness of the heliostat and adapting it to extreme wind loads.

[0021] This invention solves the problems of traditional module adjustment relying on manual operation, stress concentration leading to easy failure, and poor compatibility with existing systems. At the same time, through IP65 and above protection and anti-corrosion treatment, it is suitable for windy and dusty environments, and takes into account both automated precise control and structural stability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the ball screw adjustment device of this utility model; Figure 3 This is a schematic diagram of the inner and outer sleeve structure of this utility model; Figure 4 This is a schematic diagram of the layout design of the height gradient of the heliostat in this utility model.

[0023] In the diagram: 1. Tilt sensor; 2. Bolt; 3. Top flange; 4. Inner sleeve; 5. Outer sleeve; 6. Bottom main flange; 7. Triangular rib; 8. Bottom secondary flange; 9. Elastic buffer pad; 10. Reinforcing bolt; 11. High-precision ball screw; 12. High-precision guide shaft; 13. Permanent magnet synchronous servo motor; 14. Ball nut; 15. Ball. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 An addable heliostat height adaptive adjustment device, comprising: The components installed from top to bottom are: top flange 3, inner sleeve 4, outer sleeve 5, bottom main flange 6, and bottom secondary flange 8. All components—inner sleeve 4, outer sleeve 5, bottom main flange 6, and bottom secondary flange 8—are made of Q355B steel and have been hot-dip galvanized for corrosion protection. The top flange 3 is threaded with eight sets of bolts 2, which rigidly connect it to the heliostat base. The outer sleeve 5 is fitted over the inner sleeve 4. The bottom of the outer sleeve 5 has a bottom main flange 6 and a bottom secondary flange 8. The bottom secondary flange 8 is threaded with six sets of reinforcing bolts 10, which fit snugly against the bottom main flange 6. The bottom main flange 6 is connected to the original heliostat column via eight sets of bolts 2. An elastic buffer pad 9 is installed between the bottom main flange 6 and the original heliostat column to buffer vibrations during heliostat operation and compensate for minor unevenness on the flange surface, preventing localized stress concentration.

[0026] The upper end of the inner sleeve 4 is fixedly connected to the top flange 3. The inner sleeve 4 is equipped with a ball nut 14. The inner sleeve 4 and the outer sleeve 5 are hollow cylinders, and a ball screw 11 is connected inside. The ball nut 14 is adapted to the ball screw 11. Several balls 15 are provided between the ball nut 14 and the ball screw 11, which can perform rolling motion and obtain high motion efficiency.

[0027] An addable heliostat height adaptive adjustment device further includes: Adjusting the transmission assembly, which includes: The system includes a ball screw 11, a guide shaft 12, and a permanent magnet synchronous servo motor 13. The ball screw 11 is also fitted with a dustproof telescopic cover. The permanent magnet synchronous servo motor 13 is fixed to the bottom of the outer sleeve 5, converting electrical energy into controllable rotational torque. The rotational motion is precisely converted into linear displacement via the ball screw 11 and the ball nut 14. The lower end of the ball screw 11 is fixed in the bearing seat at the bottom of the outer sleeve 5 through a double-row angular contact ball bearing, and the upper end passes through the ball nut 14 and is connected to the output end of the permanent magnet synchronous servo motor 13. The guide shaft 12 is arranged parallel to the ball screw 11 and connected to the ball nut 14 to ensure the relative position and motion accuracy between the ball screw 11 and the ball nut 14, thereby achieving high-precision, low-friction, and reliable axial transmission.

[0028] An addable heliostat height adaptive adjustment device further includes: The sensing component includes: Inclination sensor 1 and grating ruler. Inclination sensor 1 is fixed above the top flange 3 by a bracket. The signal cable of inclination sensor 1 is threaded through the pre-reserved wiring hole in the outer sleeve 5 and connected to the control unit. A grating ruler is placed between the inner sleeve 4 and the outer sleeve 5 to collect the height data of the inner sleeve 4.

[0029] An addable heliostat height adaptive adjustment device further includes: An embedded PLC is fixed to the outside of the outer sleeve 5 and is electrically connected to the permanent magnet synchronous servo motor 13, the tilt sensor 1, and the grating ruler.

[0030] The bottom of the outer sleeve 5 is also provided with four triangular ribs 7. One end of the triangular rib 7 is connected to the rib seat by bolts, and the other end is embedded in the T-shaped groove of the inner wall of the outer sleeve 5 to achieve detachable positioning.

[0031] Working principle: The gradient mirror field layout, combined with the topographic features of the solar thermal power plant site, solar irradiance patterns, and receiver focusing requirements, achieves precise, tiered control through an adaptive heliostat height adjustment device. Figure 4As shown. First, based on the topographic mapping data of the power station site selection, including slope and elevation difference distribution, and historical solar irradiance simulation results, such as the spatial distribution of annual irradiance and the solar altitude angle variation curves in different seasons, the mirror field is divided into three gradient zones: near-field, mid-field, and far-field, according to the "distance from the receiver + terrain slope," combined with the requirement for uniform light intensity at the receiver inlet. The near-field needs to avoid overload from reflected light superposition, and the far-field needs to compensate for light intensity attenuation caused by distance. The target height range of the heliostats in each zone is initially determined: near-field 2.0-2.5m, mid-field 2.5-3.0m, and far-field 3.0-3.5m. The offset from the reflection angle reference is: near-field -0.5° to -1°, far-field +0.5° to +1°. Subsequently, the power station's central control system sends the "target height + target reflection angle" command for each heliostat to the corresponding heliostat's adjustment device PLC via the Modbus-RTU protocol. Upon receiving the command, the adjustment device first collects the current height using a grating ruler and the current verticality data using tilt sensor 1. The PLC calculates the height and verticality deviations. If the height deviation is >0.5mm, the permanent magnet synchronous servo motor 13 is driven at 15mm / min to rotate the ball screw 11. The inner sleeve 4 quickly coarsely adjusts along the guide shaft 12 until the deviation is ≤0.5mm. Then, it switches to a 2mm / min fine-tuning mode, correcting the motor's rotation through a PID algorithm. Combined with real-time feedback from the grating ruler at 10ms / time, the height deviation is controlled to ≤0.01mm. Simultaneously, based on the verticality requirements corresponding to the target reflection angle, such as a slight forward tilt in the far field to increase the reflected light height, adjustments are made. The tilt of the inner sleeve 4 is finely adjusted based on dynamic feedback data from the tilt sensor 1 to ensure verticality ≤ 0.05 mm / m. During adjustment, the triangular rib 7 maintains rigid support between the inner sleeve 4 and the outer sleeve 5. The bottom double flange and elastic buffer pad 9 absorb terrain vibrations to avoid stress concentration. During mirror field operation, the central control system monitors the reflected light intensity distribution of each zone in real time through light intensity sensors around the absorber. If the far-field light intensity is found to be lower than the design value, an elevation adjustment command is issued to the heliostat in that zone, such as from 3.0m to 3.2m. The adjustment device repeats the above adjustment process and simultaneously links with the solar tracking system to correct the reflection angle and adapt to changes in the solar altitude angle. If near-field light intensity superposition overload occurs, a height reduction command is issued, such as from 2.5m to 2.3m, and the reflection angle offset is finely adjusted to -1° to -1.5°. Light intensity balance is achieved through the adaptive function of the adjustment device. In addition, the central control system records the adjustment parameters and light intensity feedback data of each zone to form a gradient layout optimization database. According to seasonal irradiance changes, such as the need to raise the height of the heliostat to avoid shading when the solar altitude angle is low in winter, the target parameters of each zone are automatically updated. The adjustment device continuously optimizes the height and verticality according to the update command, ultimately achieving a full field of reflected light intensity uniformity of ≥90% and focusing accuracy of ≤0.1°.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An addable heliostat height adaptive adjustment device, characterized in that, include: The top flange (3), inner sleeve (4), outer sleeve (5), bottom main flange (6), and bottom secondary flange (8) are installed sequentially from top to bottom. The top flange (3) is threaded with 8 sets of bolts (2). The top flange (3) is rigidly connected to the heliostat body base through 8 sets of bolts (2). The outer sleeve (5) is fitted outside the inner sleeve (4). The bottom of the outer sleeve (5) is provided with a bottom main flange (6) and a bottom secondary flange (8). The bottom secondary flange (8) is threaded with 6 sets of reinforcing bolts (10). The bottom secondary flange (8) is fitted and fixed to the bottom main flange (6) through 6 sets of reinforcing bolts (10). The bottom main flange (6) is connected to the original heliostat column through 8 sets of bolts (2) and the flange. An elastic buffer pad (9) is installed between the bottom main flange (6) and the original heliostat column.

2. The addable heliostat height adaptive adjustment device according to claim 1, characterized in that, The upper end of the inner sleeve (4) is fixedly connected to the top flange (3), and a ball nut (14) is provided inside the inner sleeve (4).

3. The addable heliostat height adaptive adjustment device according to claim 2, characterized in that, The inner sleeve (4) and the outer sleeve (5) are hollow cylinders, and a ball screw (11) is connected inside. The ball nut (14) is adapted to the ball screw (11), and a number of balls (15) are provided between the ball nut (14) and the ball screw (11).

4. The addable heliostat height adaptive adjustment device according to claim 3, characterized in that, Also includes: Adjustable transmission assembly, the adjustable transmission assembly comprising: The components include a ball screw (11), a guide shaft (12), and a permanent magnet synchronous servo motor (13), wherein the permanent magnet synchronous servo motor (13) is fixed to the bottom of the outer sleeve (5). The lower end of the ball screw (11) is fixed in the bearing seat at the bottom of the outer sleeve (5) by a double-row angular contact ball bearing, and the upper end is inserted into the ball nut (14) and connected to the output end of the permanent magnet synchronous servo motor (13).

5. The addable heliostat height adaptive adjustment device according to claim 4, characterized in that, The guide shaft (12) is arranged parallel to the ball screw (11) and connected to the ball nut (14).

6. The addable heliostat height adaptive adjustment device according to claim 5, characterized in that, Also includes: The sensing component includes: Inclination sensor (1) and grating ruler, wherein the inclination sensor (1) is fixed above the top flange (3) by a bracket, and the signal cable of the inclination sensor (1) is threaded through the reserved wiring hole of the outer sleeve (5) and connected to the control unit; The grating ruler is located between the inner sleeve (4) and the outer sleeve (5) and is used to collect the height data of the inner sleeve (4).

7. The addable heliostat height adaptive adjustment device according to claim 6, characterized in that, Also includes: An embedded PLC is fixed to the outside of the outer sleeve (5) and is electrically connected to the permanent magnet synchronous servo motor (13), the tilt sensor (1) and the grating ruler respectively.

8. The addable heliostat height adaptive adjustment device according to claim 7, characterized in that, The bottom of the outer sleeve (5) is also provided with four triangular ribs (7). One end of the triangular rib (7) is connected to the rib seat by bolts, and the other end is embedded in the T-groove of the inner wall of the outer sleeve (5) to achieve detachable positioning.

9. The addable heliostat height adaptive adjustment device according to claim 8, characterized in that, The inner sleeve (4), outer sleeve (5), bottom main flange (6) and bottom secondary flange (8) are all made of Q355B steel and the surface is hot-dip galvanized for corrosion protection.

10. The addable heliostat height adaptive adjustment device according to claim 9, characterized in that, The ball screw (11) is also fitted with a dustproof telescopic cover on its outer side.

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