CN210425602U

CN210425602U - Double-shaft tracking driving device for large heliostat

Info

Publication number: CN210425602U
Application number: CN201921152062.9U
Authority: CN
Inventors: 蒋礼; 阎敏飞
Original assignee: Zhejiang Fixed Star Transmission Technology Co ltd
Current assignee: Zhejiang Fixed Star Transmission Technology Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-28
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a double-shaft tracking driving device of a large heliostat, which comprises an inner ring, an outer ring rotationally connected with the inner ring, and a rotating base fixed on the outer ring, wherein a pitching device is arranged on the rotating base, an eccentric disc is arranged on the inner ring, and an eccentric hole is arranged on the eccentric disc; the three horizontal rotation driving oil cylinders are arranged in the circumferential direction of the rotating base and are connected to the rotating base in a rotating mode, a hinge joint is fixedly arranged at the front end of a piston rod of one horizontal rotation driving oil cylinder, the front ends of the piston rods of the other two horizontal rotation driving oil cylinders are hinged to the hinge joint respectively, a hollow shaft is arranged on the hinge joint, and the hollow shaft is connected to the eccentric hole in a rotating mode. The utility model discloses utilize the hydro-cylinder as power element, compare the motor, can export bigger moment of torsion, can drive the rotation of large-scale reflecting plate.

Description

Double-shaft tracking driving device for large heliostat

Technical Field

The utility model relates to a heliostat technical field, in particular to drive arrangement is trailed to large-scale heliostat biax.

Background

In a solar thermal power generation system, heliostats are an important component of the entire power plant. The heliostat is far away from the central heat collecting tower of the heliostat field due to the large occupied area of the heliostat field, and the heliostat is used for reflecting sunlight to a heat absorber of the central heat collecting tower of the heliostat field by tracking the position of the sun, so that the solar power generation system can receive enough light energy, and the power generation efficiency is improved. A heliostat generally includes a support, a mirror, a horizontal rotation drive for driving the mirror for horizontal rotation, and a pitch drive for driving the mirror for pitch motion. The existing horizontal rotation driving device is usually driven by a motor and a reducer. For example, chinese patent publication No.: CN106766289B entitled heliostat tracking control device. In the invention, a motor and a worm gear device are used for driving the horizontal rotation of the heliostat. The disadvantages of this drive are: on some large-scale heliostats, because the reflecting plate is heavy, a high-power motor is required to be matched with a speed reducer with a large speed reduction ratio or other speed reduction devices to generate enough torque to drive the reflecting plate to rotate, so that the heliostats are complex in structure and high in manufacturing cost.

Disclosure of Invention

The utility model aims at solving current large-scale heliostat and need just can produce sufficient moment of torsion drive speculum rotation through high-power motor and cooperation large speed ratio reduction gear, lead to heliostat actuating mechanism's the problem that the structure is complicated, manufacturing cost is high, provide a large-scale heliostat biax tracking drive arrangement, can provide that sufficient moment of torsion drive speculum is rotatory, and simple structure, low in manufacturing cost.

The utility model aims at realizing through the following technical scheme: a double-shaft tracking driving device of a large heliostat comprises an inner ring, an outer ring rotationally connected with the inner ring and a rotating base fixed on the outer ring, wherein a pitching device is arranged on the rotating base, an eccentric disc is arranged on the inner ring, and an eccentric hole is formed in the eccentric disc; the three horizontal rotation driving oil cylinders are arranged in the circumferential direction of the rotating base and are rotationally connected to the rotating base, a hinge joint is fixedly arranged at the front end of a piston rod of one horizontal rotation driving oil cylinder, the front ends of piston rods of the other two horizontal rotation driving oil cylinders are respectively hinged to the hinge joint, a hollow shaft is arranged on the hinge joint, and the hollow shaft is rotationally connected to an eccentric hole; the hollow shaft is internally provided with a push block which can simultaneously push the moving block to move along the radial outer side of the hollow shaft so that the moving block is tightly attached to the inner wall of the eccentric hole to prevent looseness between the hollow shaft and the eccentric hole.

The utility model discloses in, inner circle fixed mounting is used for installing the reflecting plate on the every single move device on the stand of heliostat. The eccentric hole is eccentrically arranged on the eccentric disc. The utility model discloses utilize the horizontal rotation that the horizontal rotation between rotatory drive cylinder and the eccentric orfice realized rotating base's horizontal rotation, realize the luffing motion of reflecting plate in vertical side through the pitching device. The utility model discloses be provided with three horizontal rotation drive hydro-cylinder on the well rotating base, no matter be one of them horizontal rotation drive hydro-cylinder push-and-pull or during two pneumatic cylinder push-and-pull actions, there is one or two pneumatic cylinders to produce certain moment all the time in the dorsad direction of moment to make the shearing force that the eccentric orfice received littleer, increased torque output, improved whole actuating mechanism's reliability and stability. The utility model discloses utilize the hydro-cylinder as power element, compare the motor, can export bigger moment of torsion, can drive the rotation of large-scale reflecting plate. The utility model discloses a main drive arrangement is the hydro-cylinder, compares motor and reduction gear, the low cost of pneumatic cylinder, and simple structure has effectively reduced the whole manufacturing cost of heliostat. The hollow shaft is internally of a hollow structure, a plurality of sliding holes corresponding to the moving blocks are formed in the circumferential direction of the hollow shaft, the sliding holes are axially arranged along the radial direction of the hollow shaft, the moving blocks are connected in the sliding holes in a sliding mode, the moving blocks move along the radial outer side of the hollow shaft under the action of the push blocks, so that one ends, close to the inner walls of the eccentric holes, of the moving blocks can be tightly attached to the inner walls of the eccentric holes, gaps between the hollow shaft and the eccentric holes are eliminated, the eccentric shafts cannot loosen from the eccentric holes, and the rotation precision of the rotating base is improved.

Preferably, the interval angle between two adjacent horizontal rotation driving cylinders is 120 degrees.

Preferably, one side of the moving block, which is close to the pushing block, is provided with a first guide inclined plane, the side surface of the pushing block is provided with second guide inclined planes, the number of the second guide inclined planes is the same as that of the first guide inclined planes, the second guide inclined planes are respectively in contact fit with the first guide inclined planes, and an elastic part is arranged between one end of the pushing block and the inner bottom of the hollow shaft. The elastic piece can promote to the ejector pad produce axial elasticity and make the ejector pad along its axial displacement, through the cooperation of direction inclined plane between movable block and the ejector pad, the ejector pad can drive the movable block and move along the radial outside of hollow shaft when removing for the cylindrical roller that sets up on the movable block can be close to with the eccentric orfice inner wall, thereby eliminates the clearance between hollow shaft and the eccentric orfice.

Preferably, the elastic member is a compression spring.

Preferably, the elastic part is a plurality of disc springs which are sequentially overlapped.

Preferably, the pitching device comprises a pitching base arranged at the upper end of the rotating base, two sides of the pitching base are respectively and rotatably connected with pitching rotating plates, a pitching oil cylinder is rotatably connected between the two pitching rotating plates, and the front end of a piston rod of the pitching oil cylinder is rotatably connected to the pitching base. The pitching rotating plate swings in a vertical plane under the driving of the pitching oil cylinder, so that pitching motion is realized. The pitching rotating plate is used for installing the beam, the beam is used for installing the reflecting plate, and the reflecting plate is driven to realize pitching motion through the swinging of the pitching rotating plate.

Preferably, balls are provided between the inner race and the outer race. When the inner ring and the outer ring rotate relatively, the balls can reduce the abrasion between the inner ring and the outer ring.

The utility model has the advantages that: the utility model discloses utilize the hydro-cylinder as power element, compare the motor, can export bigger moment of torsion, can drive the rotation of large-scale reflecting plate. The utility model discloses a main drive arrangement is the hydro-cylinder, compares motor and reduction gear, the low cost of pneumatic cylinder, and simple structure has effectively reduced the whole manufacturing cost of heliostat. The utility model discloses in, realize the zero clearance fit between hollow shaft and the eccentric orfice, can not produce between hollow shaft and the eccentric orfice and become flexible, rotation accuracy is higher.

Drawings

Fig. 1 is a schematic structural view of one direction of the present invention.

Fig. 2 is a schematic structural view in another direction of the present invention.

Fig. 3 is a top view of the present invention.

Fig. 4 is a sectional view taken along a-a in fig. 3.

Fig. 5 is an enlarged view of a portion a of fig. 4.

Fig. 6 is an exploded view of the pitch device of the present invention.

Fig. 7 is a schematic view of the horizontal rotation structure of the present invention.

FIG. 8 is a schematic view illustrating a structure of an eccentric disc.

Fig. 9 is a schematic structural view of the hinge joint.

FIG. 10 is a schematic view of the hollow mandrel and the eccentric hole in the embodiment 1.

Fig. 11 is a schematic structural view of the push block.

FIG. 12 is a schematic structural view of the hollow shaft and the eccentric hole in accordance with embodiment 2.

In the figure: 1. The device comprises a rotating base, 2, a horizontal rotation driving oil cylinder, 3, a pitching base, 4, a pitching rotating plate, 5, a pitching oil cylinder, 6, an outer ring, 7, an inner ring, 8, an eccentric disc, 9, a ball, 10, a fixed shaft, 11, a hinge joint, 12, an eccentric hole, 13, a hinge shaft, 14, a hollow shaft, 15, a moving block, 16, a push block, 17, a pressure spring, 18 and a disc spring.

Detailed Description

The invention will be further described with reference to the following detailed description and accompanying drawings.

Example 1:

as shown in fig. 1 to 11, a large heliostat biaxial tracking drive device includes an inner ring 7, an outer ring 6, and a rotating base 1. The outer ring 6 is rotatably connected outside the inner ring 7. The inner ring 7 and the outer ring 6 are coaxially arranged. Balls 9 are arranged between the inner ring 6 and the outer ring 7. The rotating base 1 is fixedly arranged on the outer ring 6. An eccentric disc 8 is fixedly arranged on the inner ring 7. The eccentric disc 8 is of a disc-shaped structure. The eccentric disc 8 is provided with an eccentric hole 12. The eccentric hole 12 is eccentrically provided on the eccentric disc 8. The eccentric disc 8 is in a hollow structure. Three horizontal rotation driving cylinders 2 are provided in the circumferential direction of the rotating base 1. The horizontal rotation driving oil cylinder 2 is rotatably connected to the rotating base 1. The interval angle between two adjacent horizontal rotation driving cylinders 2 is 120 degrees. The both sides of horizontal rotation actuating cylinder 2 are provided with the trunnion, are provided with on the rotating bed 1 with trunnion matched with trunnion hole, the trunnion rotates to be connected in the trunnion hole. The front end of the piston rod of one of the horizontal rotation driving oil cylinders 2 is fixedly provided with a hinged joint 11. The joint 11 is provided with two hinge shafts 13 parallel to each other. The front ends of the piston rods of the other two horizontal rotation driving oil cylinders 2 are respectively hinged with a hinged shaft 13 on a hinged joint 11. The joint 11 is provided with a hollow shaft 14 which is matched with the eccentric hole. A plurality of sliding holes are arranged in the circumferential direction of the hollow shaft 14. The slide holes are distributed on the side surface of the hollow shaft in a circular array. The axial direction of the slide hole is arranged along the radial direction of the hollow shaft. In this embodiment, six slide holes are provided. Each slide hole is provided with a movable block 15 which can move along the axial direction of the slide hole. One side of the moving block 15 close to the inner wall of the eccentric hole 12 is in a circular arc shape. A push block 16 is arranged in the hollow shaft. One side of the moving block 15 close to the pushing block 16 is provided with a first guiding inclined plane. The side of the pushing block 16 is provided with second guiding inclined planes which have the same number as the first guiding inclined planes and are respectively parallel to the first guiding inclined planes. The second guide inclined planes are respectively in contact fit with the first guide inclined planes. An elastic member is arranged between one end of the push block 16 and the inner bottom of the hollow shaft 14. In this embodiment, the elastic member is a compression spring 17. The pressure spring 17 can promote to the ejector pad produce axial elasticity and make the ejector pad along its axial displacement, through the cooperation of direction inclined plane between movable block and the ejector pad, the ejector pad can drive the movable block and move along the radial outside of hollow shaft when removing for the movable block can be hugged closely with the eccentric orfice inner wall, thereby eliminates the clearance between hollow shaft and the eccentric orfice, improves rotating base's rotation accuracy.

The upper end of the rotating base 1 is provided with a pitching device. The pitching apparatus includes a pitching base 3 provided at an upper end of the rotating base. The pitching base 3 is integrally formed with the rotating base 1. Two sides of the pitching base 3 are respectively connected with a pitching rotating plate 4 in a rotating way. A pitching oil cylinder 5 is rotatably connected between the two pitching rotating plates 4. The pitching base 3 is fixedly provided with a fixed shaft 10. The front end of a piston rod of the pitching oil cylinder 5 is rotatably connected to the fixed shaft 10. The pitching rotating plate swings in a vertical plane under the driving of the pitching oil cylinder, so that pitching motion is realized. The pitching rotating plate is used for installing the beam, the beam is used for installing the reflecting plate, and the reflecting plate is driven to realize pitching motion through the swinging of the pitching rotating plate.

The utility model discloses utilize the horizontal rotation that the horizontal rotation between rotatory drive cylinder and the eccentric orfice realized rotating base's horizontal rotation, realize the luffing motion of reflecting plate in vertical side through the pitching device. The utility model discloses be provided with three horizontal rotation drive hydro-cylinder on the well rotating base, no matter be one of them horizontal rotation drive hydro-cylinder push-and-pull or during two pneumatic cylinder push-and-pull actions, there is one or two pneumatic cylinders to produce certain moment all the time in the dorsad direction of moment to make the shearing force that the eccentric orfice received littleer, increased torque output, improved whole actuating mechanism's reliability and stability. The utility model discloses utilize the hydro-cylinder as power element, compare the motor, can export bigger moment of torsion, can drive the rotation of large-scale reflecting plate. The utility model discloses a main drive arrangement is the hydro-cylinder, compares motor and reduction gear, the low cost of pneumatic cylinder, and simple structure has effectively reduced the whole manufacturing cost of heliostat.

Example 2:

as shown in fig. 12, embodiment 2 differs from embodiment 1 in that: in embodiment 2, the elastic member is a plurality of disc springs 18 stacked in sequence, and the rest of the structure is the same as that of embodiment 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.

Claims

1. The utility model provides a drive arrangement is trailed to large-scale heliostat biax, includes inner circle (7), rotates outer lane (6) of being connected with inner circle (7), fixes rotating basis (1) on outer lane (6), be provided with pitch device, its characterized in that on rotating basis (1): an eccentric disc (8) is arranged on the inner ring (7), and an eccentric hole (12) is formed in the eccentric disc (8); the rotary base is characterized in that three horizontal rotary driving oil cylinders (2) are arranged in the circumferential direction of the rotary base (1), the horizontal rotary driving oil cylinders (2) are rotatably connected to the rotary base (1), a hinged joint (11) is fixedly arranged at the front end of a piston rod of one horizontal rotary driving oil cylinder (2), the front ends of piston rods of the other two horizontal rotary driving oil cylinders (2) are respectively hinged to the hinged joint (11), a hollow shaft (14) is arranged on the hinged joint (11), and the hollow shaft (14) is rotatably connected to an eccentric hole (12); a plurality of moving blocks (15) capable of moving along the radial direction of the hollow shaft (14) are arranged on the circumference direction of the hollow shaft (14), and a push block (16) which can simultaneously push the moving blocks (15) to move along the radial outer side of the hollow shaft (14) to enable the moving blocks (15) to be attached to the inner wall of the eccentric hole (12) is arranged in the hollow shaft (14).

2. The dual-axis tracking driving device of a large heliostat according to claim 1, wherein the angle of separation between two adjacent horizontal rotary driving cylinders (2) is 120 degrees.

3. The double-shaft tracking driving device of the large heliostat according to claim 1, wherein a first guide inclined plane is arranged on one side of the moving block (15) close to the push block (16), second guide inclined planes which are the same in number as the first guide inclined planes and are respectively parallel to the first guide inclined planes are arranged on the side surface of the push block (16), the second guide inclined planes are respectively in contact fit with the first guide inclined planes, and an elastic member is arranged between one end of the push block (16) and the inner bottom of the hollow shaft (14).

4. A large heliostat biaxial tracking drive device according to claim 3, wherein the elastic member is a compression spring (17).

5. A large heliostat dual-axis tracking drive according to claim 3, wherein the elastic member is a plurality of disc springs (18) stacked in series.

6. The double-shaft tracking driving device of the large heliostat according to claim 1, wherein the pitching device comprises a pitching base (3) arranged at the upper end of the rotating base, two sides of the pitching base (3) are respectively and rotatably connected with a pitching rotating plate (4), a pitching oil cylinder (5) is rotatably connected between the two pitching rotating plates (4), and the front end of a piston rod of the pitching oil cylinder (5) is rotatably connected to the pitching base (3).

7. A large heliostat dual-axis tracking drive according to claim 1, wherein balls (9) are provided between the inner (7) and outer (6) rings.