Inhaul cable type heliostat driving device and supporting structure adopting same

Abstract

The utility model belongs to the technical field of heliostats, and particularly relates to an inhaul cable type heliostat driving device and a supporting structure adopting the same, and the inhaul cable type heliostat driving device comprises an inhaul cable, a roller and a driving mechanism for driving the roller to rotate; the inhaul cable is wound on the roller, the two ends of the inhaul cable are connected with the two sides of the bottom of the purline respectively, and the driving mechanism is provided with a worm and gear transmission structure and used for driving the roller to rotate clockwise or anticlockwise, so that the inhaul cable on one side of the roller is stretched while the inhaul cable on the other side is retracted. A worm and gear transmission structure is adopted, self-locking performance is achieved, the situation that the heliostat reversely drives the roller to rotate due to the fact that the heliostat is blown to the heliostat in a strong wind severe environment can be resisted, traction force of the inhaul cable is improved, when the heliostat is subjected to strong wind, larger traction force can be provided to guarantee stable rotation of the heliostat, the overall structural stability is high, and the service life of the heliostat is prolonged. And when being applied to a supporting structure, the bearing is light in overall weight, simple to mount, convenient to manufacture, convenient to maintain and low in overall cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of heliostats, and in particular relates to a cable-type heliostat driving device and a supporting structure using the device. Background Art

[0002] With the rapid development of solar thermal power generation, tower solar thermal power generation technology has been widely used in the market due to its high thermal efficiency and good grid peak-shaving capacity. It has clean and green properties, as well as wide active and reactive power regulation and inertia support capabilities. Tower solar thermal power generation uses a large number of heliostats to focus sunlight on the central heat exchanger installed on the top of the heat absorption tower, and completes the heat exchange by heating the molten salt in the exchanger. Heliostats are solar radiation energy collection devices used to track the sun and reflect sunlight to the heat exchanger. Since the sun's position changes constantly within a day, the corresponding heliostats should also change their position and reflection angle with the change of the sun's position, so that the reflected light can always be directed to the heat exchanger at the top of the tower without light deviation.

[0003] Existing heliostats are usually supported by trusses. The heliostat follows the change of the sun's position through a drive motor. The pitch adjustment of the heliostat is directly driven and adjusted by the drive motor or adjusted by a motor-controlled cable.

[0004] The traditional heliostat installation structure and its driving device refer to the attached manual. Figure 1 As shown, the heliostat lens is mounted on the truss A3 through the purlin A4, and the truss A3 is mounted on the torque beam of the heliostat. The first torque beam welding support A1 and the second torque beam welding support A2 are welded on the torque beam. One end of the first support seat A5 is rotatably connected to the first torque beam welding support A1 through a pin shaft, and the housing of the drive motor A6 is fixed to the second torque beam welding support A2. The push rod of the drive motor A6 is rotatably connected to the other end of the first support seat A5 through a pin shaft. Since the first support seat A5 is fixed to the bottom column, the drive motor A6 controls the push rod to extend and retract based on the controller, so that the heliostat rotates clockwise or counterclockwise along the connection end of the first support seat A5 and the first torque beam welding support A1, thereby adjusting the pitch angle of the heliostat. However, this heliostat structure is to fix the heliostat on the truss, and the truss is composed of multiple straight bar channel steels and angle irons, which uses a large amount of steel, has a complicated installation process, and is costly.

[0005] Therefore, a heliostat driving device with simple manufacturing, low cost and high structural strength is needed to solve the above problems. Utility Model Content

[0006] In view of the defects of the prior art, the present application proposes a cable-type heliostat driving device and a supporting structure using the device. The cable-type heliostat driving device adopts a worm gear transmission structure and has self-locking properties. It can resist the heliostat from driving the roller in the reverse direction due to strong winds blowing towards the heliostat in a harsh environment, thereby improving the traction force of the cable. When the heliostat is subjected to strong winds, it can provide greater traction force to ensure the stable rotation of the heliostat. The overall structure has high stability, durability and reliability.

[0007] In order to achieve the technical purpose of the utility model, the utility model will adopt the following technical solutions:

[0008] A cable-type heliostat driving device is installed on a heliostat column, and a plurality of purlins are installed at the bottom of the mirror surface of the heliostat; the cable-type heliostat driving device comprises a cable, a roller and a driving mechanism for driving the roller to rotate; the cable is wound around the roller, and its two ends are respectively connected to the two sides of the bottom of the purlin, and the driving mechanism has a worm gear transmission structure, and the driving mechanism is used to drive the roller to rotate clockwise or counterclockwise, so that the cable on one side of the roller is extended while the cable on the other side is recovered.

[0009] Furthermore, it also includes a motor and a support plate; the driving mechanism includes a worm gear, a first bearing, a worm and a third bearing;

[0010] The roller is mounted on one end of the worm wheel, and the other end is rotatably connected to the third bearing, and the third bearing is mounted on the support plate; the tooth portion of the worm is meshed with the tooth portion of the worm wheel, the first bearing is mounted on one end of the tooth portion of the worm, and the other end is connected to the motor; the support plate is mounted on the column of the heliostat.

[0011] Furthermore, the worm wheel has a bearing seat; the third bearing is installed in the bearing seat.

[0012] Furthermore, the driving mechanism also includes a second bearing; the second bearing is mounted on the worm.

[0013] Furthermore, the output shaft of the motor has a center hole, and one end of the worm passes through the second bearing and is connected to the center hole of the output shaft of the motor.

[0014] Furthermore, the first bearing and the second bearing are fixed on the support plate via bearing seats.

[0015] Furthermore, the connection points of the cable, the roller and the purlin form a triangular area.

[0016] Furthermore, the motor is connected to the host computer via a connecting line, and the motor is used to control the driving mechanism to drive the roller to rotate clockwise or counterclockwise based on a control instruction of the host computer.

[0017] The utility model also provides a heliostat support structure using a cable-type heliostat drive device, comprising a plurality of purlins, a heliostat lens installed above the purlins, a torque beam connected to the bottom of the purlins, a second support seat rotatably connected to the torque beam, a column connected to the bottom of the second support seat, and a cable-type heliostat drive device;

[0018] The guyed-cable heliostat driving device is any one of the guyed-cable heliostat driving devices described above.

[0019] The beneficial effects of the utility model are:

[0020] First, the utility model drives the roller to rotate clockwise or counterclockwise through the driving mechanism, so that the cable on one side of the roller is extended while the cable on the other side is recovered, and the heliostat is pulled to rotate by the cable on the recovery side. The driving mechanism has a worm gear transmission structure. Through the self-locking property of the worm gear, it can resist the heliostat from driving the roller in the opposite direction due to strong winds blowing towards the heliostat, thereby improving the traction force of the cable. When the heliostat is subjected to strong winds, it can provide greater traction force to ensure the stable rotation of the heliostat, and the overall structure has high stability, durability and reliability.

[0021] Second, in a preferred implementation, the motor of the utility model controls the different rotation directions of the worm gear of the driving mechanism, thereby driving the roller to change the extension of one side of the cable and the retraction of the other side, and the heliostat is pulled to rotate along the rotation center by retracting the other side of the cable, thereby adjusting the pitch angle of the heliostat;

[0022] Third, in the preferred implementation, the driving mechanism of the utility model realizes a large transmission ratio through the meshing transmission of the worm wheel and the worm, which not only improves the ability of the motor to bear the load of the heliostat and the service life of the motor, but also has self-locking property. The roller can only rotate through the worm wheel driven by the worm, and the roller and the worm wheel cannot be driven by external force to rotate in the opposite direction of the heliostat, which plays a very important protective role in the drive of the heliostat.

[0023] Fourth, in the preferred implementation, the triangular area formed by the connection points of the cable, the roller and the purlin of the utility model has high structural stability, and only one complete cable is needed to achieve the traction of the heliostat, and the manufacturing cost is low;

[0024] Fifth, the utility model is applied to the support structure of the heliostat, which has a simple overall structure, is easy to manufacture and maintain, does not need to add external steel structure support, further reduces the load of the cable and the drive mechanism, and improves the service life. The cable is connected to the purlins on both sides of the heliostat. Compared with the existing heliostat support structure connected by a truss, the cable stress is used to enhance the structural stability, the weight is greatly reduced, and the overall cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of an existing heliostat driving device;

[0026] Figure 2 It is a side view of the cable-type heliostat driving device of Example 1 of the utility model;

[0027] Figure 3 is a top view of a cable-type heliostat driving device of Example 1 of the utility model;

[0028] Figure 4 This is a pitch principle diagram of a cable-type heliostat driving device according to Embodiment 1 of the utility model;

[0029] Figure 5 The three-dimensional structure of the traction assembly of the cable-type heliostat driving device of the embodiment 2 of the utility model Figure 1 ;

[0030] Figure 6 It is a three-dimensional structural diagram of the worm gear of the traction assembly of Example 2 of the utility model;

[0031] Figure 7 The three-dimensional structure of the traction assembly of the cable-type heliostat driving device of the embodiment 2 of the utility model Figure 2 .

[0032] Among them, 1-cable; 2-roller; 3-traction assembly; 30-worm gear; 300-bearing seat; 31-first bearing; 32-worm; 33-second bearing; 34-third bearing; 4-motor; 5-support plate; A1-first torque beam welding support; A2-second torque beam welding support; A3-truss; A4-purlin; A5-first support seat; A6-drive motor; A7-second support seat; A8-torque beam. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present application, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] The terms such as up, down, left, right, front and back in this application document are based on the positional relationships shown in the drawings. If the drawings are different, the corresponding positional relationships may also change accordingly, so they cannot be understood as limiting the scope of protection.

[0035] In this application, the terms "install", "connected", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, or mutual communication, a direct connection, or an indirect connection through an intermediate medium, the internal connection of two components, or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The utility model discloses a cable-type heliostat driving device and a supporting structure using the same. The cable-type heliostat driving device is installed on a heliostat column and comprises a roller, a cable and a driving mechanism for driving the roller to rotate. The cable is wound around the roller, and two ends of the cable are respectively connected to two sides of the bottom of a purlin of the heliostat. The roller is driven to rotate clockwise or counterclockwise by the driving mechanism, so that the cable on one side of the roller is extended while the cable on the other side is recovered. The heliostat is pulled to rotate by the cable on the recovered side. The driving mechanism has a worm gear transmission structure. The self-locking property of the worm gear can prevent the heliostat from driving the roller to rotate in the reverse direction due to strong wind blowing toward the heliostat, thereby improving the traction force of the cable. When the heliostat is subjected to strong wind, greater traction force can be provided to ensure the stable rotation of the heliostat. The overall structure has high stability, durability and reliability.

[0037] Example 1

[0038] Refer to the instruction manual Figure 2-4 The cable-type heliostat driving device of the utility model also includes a motor 4 and a support plate 5. One end of the worm wheel of the driving mechanism is rotatably connected to the support plate 5, and the other end is installed with a roller 2. The cable 1 is wound on the roller 2. The two ends of the cable 1 are connected and fixed to the two sides of the bottom of the purlin through the cable connector. The connection point of the cable 1, the roller 2 and the purlin forms a triangular area. The worm of the driving mechanism is meshed with the worm wheel, and the other end is connected to the output shaft of the motor 4. The housing of the motor 4 is installed on the support plate 5, and the support plate 5 is installed on the column of the heliostat. The connection method of the housing of the motor 4 and the support plate 5 is welding or bracket connection, and the connection method of the support plate 5 and the column of the heliostat is welding connection. The motor 4 is connected to the host computer through a connecting line, and controls the driving mechanism to drive the roller 2 to rotate clockwise or counterclockwise based on the control command of the host computer, thereby controlling the mirror surface of the heliostat to rotate to a suitable solar incidence angle.

[0039] As the instruction manual Figure 4 As shown, the connection point of distance a and distance b is the rotation center of the heliostat, and distance a and distance b represent the projection distances from the installation points of the cable and the purlin on both sides to the rotation center on the heliostat. The distance from the rotation center to the center of the pulley shaft is I, and the angle between the heliostat mirror surface and the distance I is the pitch angle of the heliostat, which is represented by θ. The length of cable 1 is defined as k, and the length of cable 1 k, the distance from the rotation center to the center of the pulley shaft I, and the pitch angle θ of the heliostat are determined based on the following formula:

[0040]

[0041] Since the length k of the cable 1, the distance a and the distance b are all fixed values, the pitch angle θ of the heliostat can be adjusted by changing the distance I from the rotation center to the center of the pulley shaft.

[0042] by Figure 4 Taking the state shown as an example, when the motor 4 drives the worm wheel of the driving mechanism to rotate clockwise, the right cable 1 wound on the roller 2 is retracted, the left cable 1 is extended, and the right cable 1 pulls the heliostat to rotate clockwise along the rotation center. At this time, the pitch angle θ decreases, and the heliostat gradually tends to a vertical posture; when the motor 4 drives the worm wheel of the driving mechanism to rotate counterclockwise, the right cable 1 wound on the roller 2 is extended, the left cable 1 is retracted, and the left cable 1 pulls the heliostat to rotate counterclockwise along the rotation center. At this time, the pitch angle θ increases, and the heliostat gradually tends to a horizontal posture.

[0043] With the structure of this embodiment, the motor 4 controls the different rotation directions of the worm wheel of the driving mechanism, thereby driving the roller 2 to change the extension of one side of the cable 1 and the retraction of the other side. The heliostat is pulled to rotate along the rotation center by retracting the other side of the cable 1, so as to adjust the pitch angle of the heliostat. The triangular area formed by the connection points of the cable 1, the roller 2 and the purlin has high structural stability, and only one complete cable 1 is required to achieve the traction of the heliostat, with low manufacturing cost. The worm gear structure of the driving mechanism realizes a large transmission ratio, provides greater traction force for the cable 1, does not need to increase external steel structure support, further reduces the load of the cable 1 and the driving mechanism, and improves the service life.

[0044] Example 2

[0045] Refer to the instruction manual Figure 5-7 On the basis of Example 1, the driving mechanism further includes a first bearing 31 , a second bearing 33 and a third bearing 34 .

[0046] The worm wheel 30 has a threaded hole at one end, and the roller 2 has a screw at one end. The screw of the roller 2 is fixed in the threaded hole of the worm wheel 30. The other end of the worm wheel 30 has a bearing seat 300. The third bearing 34 is installed in the bearing seat 300. The third bearing 34 is fixed to the support plate 5 through a rotating shaft. The tooth portion of the worm 32 meshes with the tooth portion of the worm wheel 30. The first bearing 31 and the second bearing 33 are installed at both ends of the tooth portion of the worm 32. The first bearing 31 and the second bearing 33 are fixed to the support plate 5 through the bearing seat. The connection method of the bearing seats of the first bearing 31 and the second bearing 33 and the support plate 5 is bolted or welded. The output shaft of the motor 4 has a center hole. One end of the worm 32 passes through the second bearing 33 and is connected to the center hole of the output shaft of the motor 4. The connection method can be key connection or spline connection.

[0047] With the structure of this embodiment, the driving mechanism is driven by the meshing transmission of the worm wheel 30 and the worm 32, which not only improves the ability of the motor 4 to bear the load of the heliostat and increases the service life of the motor 4, but also has a self-locking property. The roller 2 can only rotate the worm wheel 30 driven by the worm 32, and the roller 2 and the worm wheel 30 cannot be driven by an external force to drive the heliostat in the opposite direction, which plays a very important protective role in the drive of the heliostat.

[0048] Example 3

[0049] The utility model also provides a heliostat support structure using a cable-type heliostat drive device, Figure 2 The heliostat support structure includes a plurality of purlins, a heliostat lens installed above the purlins, a torque beam A8 connected to the bottom of the purlins, a second support seat A7 rotatably connected to the torque beam A8, a column connected to the bottom of the second support seat A7, and a cable-type heliostat drive device.

[0050] The heliostat support structure adopting the cable-type heliostat driving device of the utility model has a simple overall structure, is convenient to manufacture, and is easy to maintain. It does not need to install a truss. It is connected to the purlins on both sides of the heliostat through the cable 1. Compared with the existing heliostat support structure connected by a truss, the cable 1 is stressed to enhance the structural stability, the weight is greatly reduced, and the overall cost is low. The worm wheel 30 and the worm 32 adopted by the driving mechanism are meshed and driven, which improves the traction force, has self-locking property, and has high overall structural stability and reliability.

[0051] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A cable-type heliostat driving device, wherein the cable-type heliostat driving device is installed on a heliostat column, and a plurality of purlins are installed at the bottom of the mirror surface of the heliostat; characterized in that: The cable-type heliostat drive device comprises a cable (1), a roller (2) and a drive mechanism for driving the roller (2) to rotate; the cable (1) is wound around the roller (2), and its two ends are respectively connected to two sides of the bottom of the purlin, and the drive mechanism has a worm gear transmission structure, and the drive mechanism is used to drive the roller (2) to rotate clockwise or counterclockwise, so that the cable (1) on one side of the roller (2) is extended while the cable (1) on the other side is retracted.

2. The cable-type heliostat driving device according to claim 1, characterized in that: It also includes a motor (4) and a support plate (5); the driving mechanism includes a worm gear (30), a first bearing (31), a worm (32) and a third bearing (34); The roller (2) is mounted on one end of the worm wheel (30), and the other end is rotatably connected to the third bearing (34), and the third bearing (34) is mounted on the support plate (5); the tooth portion of the worm (32) meshes with the tooth portion of the worm wheel (30), the first bearing (31) is mounted on one end of the tooth portion of the worm (32), and the other end is connected to the motor (4); the support plate (5) is mounted on a column of the heliostat.

3. The cable-type heliostat driving device according to claim 2, characterized in that: The worm wheel (30) has a bearing seat (300); the third bearing (34) is installed in the bearing seat (300).

4. The cable-type heliostat driving device according to claim 2, characterized in that: The driving mechanism further comprises a second bearing (33); the second bearing (33) is mounted on the worm (32).

5. The cable-type heliostat driving device according to claim 4, characterized in that: The output shaft of the motor (4) has a central hole, and one end of the worm (32) passes through the second bearing (33) and is connected to the central hole of the output shaft of the motor (4).

6. The cable-type heliostat driving device according to claim 4, characterized in that: The first bearing (31) and the second bearing (33) are fixed on the support plate (5) via a bearing seat.

7. The cable-type heliostat driving device according to claim 1, characterized in that: The connection points of the cable (1), the roller (2) and the purlin form a triangular area.

8. The cable-type heliostat driving device according to claim 2, characterized in that: The motor (4) is connected to the host computer via a connecting line, and the motor (4) is used to control the driving mechanism to drive the roller (2) to rotate clockwise or counterclockwise based on the control instructions of the host computer.

9. A heliostat support structure using a cable-type heliostat drive device, characterized in that: It includes a plurality of purlins, heliostat lenses installed above the purlins, a torque beam connected to the bottom of the purlins, a second support seat rotatably connected to the torque beam, a column connected to the bottom of the second support seat, and a cable-type heliostat driving device; The cable-type heliostat driving device is the cable-type heliostat driving device according to any one of claims 1 to 8.

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