A solar heliostat rotation mechanism

Abstract

The present invention relates to a solar heliostat rotation mechanism, comprising an inner cylinder, the inner cylinder is fixed to the ground through a column, an outer cylinder for fixing a reflector mounting frame is sleeved on the inner cylinder, a rotating shaft is arranged in the middle of the inner cylinder, a bearing is arranged between the rotating shaft and the outer cylinder, and the outer cylinder can rotate around the rotating shaft; the outer cylinder is also provided with a driving mechanism for driving the outer cylinder to rotate, the driving mechanism comprises a driven bevel gear fixed on the inner cylinder and an active bevel gear fixed on the outer cylinder, and the outer cylinder is also provided with a motor for driving the active bevel gear to rotate forward and reversely, the motor drives the active bevel gear to rotate along the driven bevel gear, thereby driving the outer cylinder to rotate along the inner cylinder. The present invention solves the technical problems in the prior art that the heliostat in the solar thermal power generation mirror field cannot rotate forward and reverse 360 ​​degrees, cannot be aligned with the sun at the best angle all day long, and has high installation and debugging costs.

Description

Technical Field

[0001] The invention relates to the technical field of solar thermal power generation equipment, in particular to a solar heliostat rotating mechanism. Background Art

[0002] The solar thermal power generation system includes a heliostat and a heat absorption tower. The heliostat is used to collect solar radiation energy and focus it on the heat absorption tower. The prior art solar thermal power generation heliostat includes a column, a rotating frame pivotally connected to the upper end of the column around the axis of the column, a mirror frame mounted on the rotating frame, and a plurality of mirror components fixedly mounted on the mirror frame. The rotating frame can rotate horizontally around the column, and the mirror frame can also perform pitching motion on the rotating frame, driving the mirror component to rotate horizontally and pitch around the column to adjust the normal direction of the reflective sub-mirror and ensure that the sunlight is reflected to the absorber on the heat absorption tower as required.

[0003] The mirror angle of the heliostat includes the altitude angle related to the mirror pitch angle and the azimuth angle related to the mirror direction. The azimuth drive device commonly includes a rotary reducer, a gear rack, and a push rod. Currently, the more commonly used single push rod drives the mirror to rotate to adjust the azimuth angle. In order to pursue the best reflection angle in all weather conditions, the azimuth angle adjustment of the heliostat is greater than 240 degrees. However, due to the motion interference between the push rod and the column, the rotation angle is limited (less than 240 degrees), making it impossible for some heliostats in the solar thermal power generation mirror field to aim at the sun at the best angle all weather. In the prior art, for such heliostats with an azimuth rotatable angle less than 240 degrees, in order to ensure that the heliostats can maximize the use of reflected sunlight, it is necessary to perform installation and debugging of different azimuths for each heliostat at different positions during installation, which increases the installation workload and debugging costs. Even after targeted installation and debugging, some heliostats in the mirror field with an azimuth operating angle range exceeding 240 degrees still cannot work normally in the morning or evening. Therefore, it is a technical problem to be solved in the prior art to enable the heliostats to rotate 360 ​​degrees forward and reverse and to operate smoothly during the rotation process. Summary of the invention

[0004] The purpose of the present invention is to provide a solar heliostat rotation mechanism, aiming to solve the technical problems in the prior art that the heliostats in the solar thermal power generation mirror field cannot rotate 360 ​​degrees forward and reverse, cannot be aimed at the sun at the best angle all day long, and have high installation and debugging costs.

[0005] The technical solution of the present invention is as follows:

[0006] A solar heliostat rotation mechanism comprises an inner cylinder, which is fixed to the ground by a column, and is characterized in that an outer cylinder for fixing a reflector mounting frame is sleeved on the inner cylinder, a rotating shaft is arranged in the middle of the inner cylinder, a bearing is arranged between the rotating shaft and the outer cylinder, and the outer cylinder can rotate around the rotating shaft; a driving mechanism for driving the outer cylinder to rotate is also arranged on the outer cylinder, the driving mechanism comprises a driven bevel gear fixed on the inner cylinder and an active bevel gear fixed on the outer cylinder, the active bevel gear is meshed with the driven bevel gear, and a motor for driving the active bevel gear to rotate forward and reverse is also arranged on the outer cylinder, the motor drives the active bevel gear to rotate along the driven bevel gear, thereby driving the outer cylinder to rotate along the inner cylinder.

[0007] Among them, a bearing seat is arranged on the outer cylinder, the active bevel gear is rotatably arranged in the bearing seat through a tapered roller bearing, an adjustment gasket is arranged between the tapered roller bearings, a guide bearing is arranged at the right end of the active bevel gear, and a flange and a nut for fastening the flange are arranged at the left end of the active bevel gear.

[0008] Among them, a gear box is fixed on the bearing seat, a driven gear is connected to the inner flange of the gear box, a motor and a reducer are fixed on the outer side of the gear box, a driving gear is fixed on the motor output shaft in the gear box, and the driving gear is meshed with the driven gear; the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the driving bevel gear to rotate along the tooth surface trajectory of the driven bevel gear.

[0009] Among them, a thrust bearing, an inner tapered roller bearing, an outer tapered roller bearing, a pressure block and an adjusting nut are installed on the rotating shaft in sequence, the inner ring of the tapered roller bearing is installed on the rotating shaft, the outer ring of the tapered roller bearing is installed on the outer cylinder, and the adjusting nut is used to tighten and adjust the fitting clearance of the tapered roller bearing to ensure that the outer cylinder can rotate flexibly along the rotating shaft.

[0010] Wherein, two active bevel gears are arranged on the outer cylinder, the two active bevel gears are symmetrically arranged, and the two active bevel gears are meshed with the driven bevel gears.

[0011] Wherein, a plurality of driving bevel gears are arranged on the outer cylinder, and the plurality of driving bevel gears are all meshed with the driven bevel gears.

[0012] Wherein, a roller is arranged at the joint between the lower end of the outer cylinder and the inner cylinder to facilitate the guiding rotation.

[0013] Wherein, the guide bearing arranged at the right end of the active bevel gear is fixed on the outer cylinder through a positioning plate; and a flange oil seal is arranged between the bearing seat and the flange.

[0014] Wherein, the driving bevel gear and the driven bevel gear can be spiral gears or hyperbolic gears.

[0015] Wherein, the outer cylinder is provided with a cover to prevent dust from entering.

[0016] The present invention has the following beneficial effects:

[0017] 1. The outer cylinder of the present invention is provided with a driving mechanism for driving the outer cylinder to rotate. The driving mechanism includes a driven bevel gear fixed on the inner cylinder and an active bevel gear fixed on the outer cylinder. The active bevel gear is meshed with the driven bevel gear. The motor drives the active bevel gear to rotate along the tooth surface trajectory of the driven bevel gear, thereby driving the outer cylinder to rotate 360 ​​degrees along the inner cylinder, thereby solving the technical problems that the heliostat in the solar thermal power generation mirror field in the prior art cannot rotate 360 ​​degrees forward and reverse, cannot be aligned with the sun at the best angle all day long, and has high installation and debugging costs; the master and slave bevel gears are hyperbolic gears, and the active bevel gear is rotatably arranged in the bearing seat through a tapered roller bearing, and an adjusting gasket is arranged between the tapered roller bearings. The installation position of the active bevel gear can be adjusted by adjusting the gasket to adjust the meshing clearance between the active bevel gear and the driven bevel gear, thereby avoiding the jitter caused by the matching clearance during operation, and ensuring that the heliostat runs smoothly during the rotation process.

[0018] 2. A gear box is fixed on the bearing seat of the present invention, a driven gear is connected to the flange inside the gear box, a motor and a reducer are fixed on the outside of the gear box, a driving gear is fixed on the output shaft of the motor in the gear box, the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the driving bevel gear to rotate along the track of the tooth surface of the driven bevel gear; the motor + reducer + master and slave gears + master and driven bevel gears are adopted to realize the return motion of the drive system along the tooth surface track, thereby realizing large torque, low speed and stable operation.

[0019] 3. A rotating shaft is arranged in the middle of the inner cylinder of the present invention, and a thrust bearing, an inner tapered roller bearing, an outer tapered roller bearing, a pressure block and an adjusting nut are sequentially installed on the rotating shaft. The inner ring of the tapered roller bearing is installed on the rotating shaft, and the outer ring of the tapered roller bearing is installed on the outer cylinder. By arranging the thrust bearing and the tapered roller bearing, and by adjusting the nut to tighten and adjust the fitting clearance of the tapered roller bearing, the rotation resistance is reduced, and the outer cylinder is guaranteed to rotate flexibly along the rotating shaft.

[0020] 4. The outer cylinder of the present invention is provided with a plurality of active bevel gears, and the plurality of active bevel gears are all meshed with the driven bevel gears; the active bevel gears and the support system are added to improve the support rigidity, balance the torque, and make the whole mechanism run more smoothly.

[0021] 5. The lower end of the outer cylinder of the present invention is provided with a roller at the joint between the inner cylinder and the outer cylinder, which has a guiding function and makes the outer cylinder rotate more flexibly along the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a solar heliostat rotation mechanism of the present invention;

[0023] Figure 2 A top view of a solar heliostat rotation mechanism of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a second embodiment of a solar heliostat rotation mechanism of the present invention;

[0025] The reference numerals in the figure are as follows:

[0026] 1-inner cylinder; 2-outer cylinder; 3-rotating shaft; 4-driven bevel gear; 5-driving bevel gear; 6-motor; 7-bearing seat; 8-tapered roller bearing; 9-adjusting gasket; 10-guide bearing; 11-flange; 12-nut; 13-gearbox; 14-driven gear; 15-reducer; 16-driving gear; 17-thrust bearing; 18-inner tapered roller bearing; 19-outer tapered roller bearing; 20-pressure block; 21-adjusting nut; 22-roller; 23-positioning plate; 24-flange oil seal; 25-cover; 26-bolt; 27-positioning pin; 28-covering plate. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1:

[0029] See also Figures 1 to 3 A solar heliostat rotation mechanism comprises a circular inner cylinder 1, wherein the inner cylinder 1 is fixed to the ground through a column, an outer cylinder 2 for fixing a reflector mounting frame is sleeved on the inner cylinder 1, a rotating shaft 3 is arranged in the middle of the inner cylinder 1, a bearing is arranged between the rotating shaft 3 and the outer cylinder 2, and the outer cylinder 2 can rotate around the rotating shaft 3; a driving mechanism for driving the outer cylinder 2 to rotate is also arranged on the outer cylinder 2, the driving mechanism comprises a driven bevel gear 4 fixed on the inner cylinder 1 and an active bevel gear 5 fixed on the outer cylinder 2, the active bevel gear 5 is meshed with the driven bevel gear 4, and a motor 6 for driving the active bevel gear 5 to rotate forward and reverse is also arranged on the outer cylinder 2, the motor 6 drives the active bevel gear 5 to rotate along the driven bevel gear 4, thereby driving the outer cylinder 2 to rotate along the inner cylinder 1.

[0030] Furthermore, a bearing seat 7 is provided on the outer cylinder 2, and the bearing seat 7 is fixed to the outer cylinder 2 by bolts 26 and positioning pins 27. The active bevel gear 5 is rotatably arranged in the bearing seat 7 through a tapered roller bearing 8, and an adjustment gasket 9 is arranged between the tapered roller bearings 8. A guide bearing 10 is provided at the right end of the active bevel gear 5, and the guide bearing 10 is fixed to the outer cylinder 2 through a positioning plate 23; a flange 11 and a nut 12 for fastening the flange 11 are provided at the left end of the active bevel gear 5; a flange oil seal 24 is provided between the bearing seat 7 and the flange 11 to prevent dust from entering.

[0031] Furthermore, a gear box 13 is fixed on the bearing seat 7, a driven gear 14 is connected to the inner flange 11 of the gear box 13, a motor 6 and a reducer 15 are fixed on the outer side of the gear box 13, a driving gear 16 is fixed on the output shaft of the motor 6 in the gear box 13, and the driving gear 16 is meshed with the driven gear 14; the motor 6 drives the driving gear 16 to rotate, the driving gear 16 drives the driven gear 14 to rotate, and the driven gear 14 drives the driving bevel gear 5 to rotate along the tooth surface trajectory of the driven bevel gear 4, the number of teeth of the driving gear 16 is 15 to 25, and the number of teeth of the driven gear 14 is 125 to 135.

[0032] Furthermore, a thrust bearing 17, an inner tapered roller bearing 18, an outer tapered roller bearing 19, a pressure block 20 and an adjusting nut 21 are sequentially installed on the rotating shaft 3; the inner ring of the tapered roller bearing 8 is installed on the rotating shaft 3, and the outer ring of the tapered roller bearing 8 is installed on the outer cylinder 2; the adjusting nut 21 is used to tighten and adjust the fitting clearance of the tapered roller bearing 8 to ensure that the outer cylinder 2 can rotate flexibly along the rotating shaft 3; a cover 25 is provided on the outer cylinder 2 above the rotating shaft 3 to prevent dust from entering.

[0033] Furthermore, a stopper is provided on the inner side of the lower end of the outer cylinder 2 , a plurality of rollers 22 are mounted on the stopper, and a sealing plate 28 is provided at the lower end of the stopper; the outer cylinder 2 can rotate along the inner cylinder 1 through the rollers 22 .

[0034] Furthermore, the driving bevel gear 5 and the driven bevel gear 4 may be helical gears or hypoid gears.

[0035] Embodiment 2:

[0036] Compared with the first embodiment, the difference is that the outer cylinder 2 is provided with a plurality of active bevel gears 5, and the plurality of active bevel gears 5 are all meshed with the driven bevel gear 4; the active bevel gears 5 are rotatably arranged in the bearing seat 7 through the tapered roller bearings 8, and the tapered roller bearings 8 are provided with adjustment gaskets 9, the right end of the active bevel gear 5 is provided with a guide bearing 10, and the left end of the active bevel gear 5 is provided with a flange 11 and a nut 12 for fastening the flange 11. This embodiment solves the same technical problems as the first embodiment and has the same technical effects as the first embodiment; at the same time, a plurality of active bevel gears 5 and a support system are added to improve the support rigidity, balance the torque, and make the whole mechanism run more smoothly.

[0037] In the description of the invention, it is necessary to understand that the terms "upper end", "lower end", "left end", "right end", "one side", "forward", "close", "inside", "upper", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0038] In the invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the invention according to the specific circumstances.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A solar heliostat rotation mechanism, comprising an inner cylinder (1), wherein the inner cylinder (1) is fixed to the ground via a column, and characterized in that: An outer cylinder (2) for fixing a reflector mounting frame is sleeved on the inner cylinder (1); a rotating shaft (3) is arranged in the middle of the inner cylinder (1); a bearing is arranged between the rotating shaft (3) and the outer cylinder (2); the outer cylinder (2) can rotate around the rotating shaft (3); a driving mechanism for driving the outer cylinder (2) to rotate is also arranged on the outer cylinder (2); the driving mechanism comprises a driven bevel gear (4) fixed on the inner cylinder (1) and a driving bevel gear (5) fixed on the outer cylinder (2); the driving bevel gear (5) is meshed with the driven bevel gear (4); a motor (6) for driving the driving bevel gear (5) to rotate forward and reverse is also arranged on the outer cylinder (2); the motor (6) drives the driving bevel gear (5) to rotate along the driven bevel gear (4), thereby driving the outer cylinder (2) to rotate along the inner cylinder (1); The outer cylinder (2) is provided with a bearing seat (7), the active bevel gear (5) is rotatably arranged in the bearing seat (7) via a tapered roller bearing (8), an adjustment gasket (9) is arranged between the tapered roller bearings (8), a guide bearing (10) is arranged at the right end of the active bevel gear (5), and a flange (11) and a nut (12) for fastening the flange (11) are arranged at the left end of the active bevel gear (5); A gear box (13) is fixed on the bearing seat (7), a driven gear (14) is connected to the inner flange (11) of the gear box (13), a motor (6) and a reducer (15) are fixed on the outer side of the gear box (13), a driving gear (16) is fixed on the output shaft of the motor (6) in the gear box (13), and the driving gear (16) is meshed with the driven gear (14); the motor (6) drives the driving gear (16) to rotate, the driving gear (16) drives the driven gear (14) to rotate, and the driven gear (14) drives the driving bevel gear (5) to perform a rotary motion along the tooth surface trajectory of the driven bevel gear (4); The rotating shaft (3) is sequentially mounted with a thrust bearing (17), an inner tapered roller bearing (18), an outer tapered roller bearing (19), a pressure block (20) and an adjusting nut (21); the inner ring of the tapered roller bearing (8) is mounted on the rotating shaft (3); the outer ring of the tapered roller bearing (8) is mounted on the outer cylinder (2); and the adjusting nut (21) is used to tighten and adjust the matching clearance of the tapered roller bearing (8) to ensure that the outer cylinder (2) can rotate flexibly along the rotating shaft (3); The outer cylinder (2) is provided with two active bevel gears (5), the two active bevel gears (5) are symmetrically arranged, and the two active bevel gears (5) are both meshed with the driven bevel gear (4); A plurality of active bevel gears (5) are arranged on the outer cylinder (2), and the plurality of active bevel gears (5) are all meshed with the driven bevel gears (4).

2. A solar heliostat rotation mechanism as claimed in claim 1, characterized in that: A roller (22) is provided at the position where the lower end of the outer cylinder (2) and the inner cylinder (1) cooperate to facilitate the guiding rotation.

3. A solar heliostat rotation mechanism according to claim 1, characterized in that: The guide bearing (10) arranged at the right end of the active bevel gear (5) is fixed on the outer cylinder (2) through a positioning plate (23); a flange oil seal (24) is arranged between the bearing seat (7) and the flange (11).

4. A solar heliostat rotation mechanism as claimed in claim 1, characterized in that: The driving bevel gear (5) and the driven bevel gear (4) can be spiral gears or hypoid gears.

5. A solar heliostat rotation mechanism as claimed in claim 1, characterized in that: The outer cylinder (2) is provided with a sealing cover (25) for preventing dust from entering.

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