WO2012152143A1

WO2012152143A1 - Adaptive rotary device for solar tracking and working method thereof

Info

Publication number: WO2012152143A1
Application number: PCT/CN2012/073058
Authority: WO
Inventors: 黄忠
Original assignee: 成都钟顺科技发展有限公司
Priority date: 2011-05-06
Filing date: 2012-03-26
Publication date: 2012-11-15
Also published as: CN102306028A; CN102306028B

Abstract

An adaptive rotary device for solar tracking and a working method thereof belong to the field of solar trackers. The adaptive rotary device is arranged on a bracket of a solar battery pack (1) and comprises an azimuth angle rotation support (5) and/or an elevation angle rotation support (6). The orientation angle rotation support (5) and/or the height angle rotation support (6) comprise(s) a turntable shell (5a). A worm wheel (5f) is arranged in the turntable shell (5a). At least two worms (5d, 5e) are arranged around the worm wheel (5f). The plurality of worms (5d,5e) simultaneously keep engaging with the worm wheel (5f) and seamlessly and jointly drive the worm wheel (5f) to rotate at different time phase sequences and different rotation speeds in the same tendency. The device can perform seamlessly driving and tracking for a long time and automatically compensate gaps formed by abrasion.

Description

Adaptive rotary device for sun tracking and working method thereof

Technical field

The present invention relates to a sun tracking system, and more particularly to an adaptive slewing device for use on a sun tracking system.

Background technique

The solar tracking system is a power device that keeps the solar panels facing the sun at any time, allowing the sunlight to illuminate the solar panels at any time, which can significantly improve the power generation efficiency of the solar photovoltaic modules. On the sun tracking system, a slewing support device is provided for driving the sun tracking system to track the sun. The slewing support device currently used, as shown in Figs. 1 and 2, generally adopts a structure in which an external tooth type single-row four-point contact ball type slewing bearing cooperates with a worm, and the driving mode is a single motor drive to realize a solar battery module pair. The tracking motion in the azimuth of the sun is also driven by this mode. Due to the manufacturing and assembly of the turret, the worm and the worm always have a certain gap. The slewing support device can only control the gap value between 0. 1-0. 2 degrees, although the higher precision slewing support can better reduce the gap value, but the cost is expensive, which is not conducive to popularization and application; In the long-term outdoor operation of the single-motor-driven turntable, the gap value will gradually increase due to factors such as wind load and running wear, and it cannot be automatically compensated. Because of this gap, the sun tracker can not achieve the tracking without gaps, which will cause the tracking accuracy of the sun tracker to be improved, and the gap will gradually increase with the passage of time, and finally the service life will be reduced due to the decrease of tracking accuracy. . Moreover, in the current slewing support device, a single-row four-point contact ball type structure is adopted, and although the structure can bear the axial force and the overturning moment, the load bearing load is small, and the single-row ball runs smoothly relative to the double row. The smooth running of the balls is poor.

The sun tracking system is set outdoors. Under the influence of the wind load, the slewing support device causes the entire sun tracker to vibrate back and forth due to the existence of the gap, so that the worm and worm contact surfaces collide with each other. Produce "pitting" phenomenon, accelerate the damage of equipment, and the service life of solar tracking equipment is generally required to be 2.0, more than one year, the service life of the slewing support with such structure is difficult to meet the requirements, and how to protect the Taihang tracking system the long-term stable operation without clearance cost, has been a major problem areas of track design. ^¾ SUMMARY

The object of the present invention is to provide a simple structure, convenient use, low cost, long life, long-term gapless drive tracking, and automatic compensation for the gap generated by wear, which can correct the tracking accuracy. An adaptive slewing device for sun tracking and its working method.

The technical solution adopted by the present invention is as follows:

An adaptive slewing device for sun tracking of the present invention, the adaptive slewing device comprising an azimuth slewing support and/or a height angular slewing support, the azimuth slewing support and/or the height angular slewing support comprising a turntable housing, A turbine is disposed in the turntable housing, and at least two worms are disposed around the turbine. The plurality of worms are simultaneously meshed with the turbine, and at different time phases and at different rotational speeds, the same trend is used to realize the turbine drive without gaps. .

Since the above structure is adopted, at least two worms are disposed around the turbine, and the plurality of worms are simultaneously meshed with the turbine, so that the structure of the plurality of worms can be controlled, and when the worm drives the turbine to rotate, the plurality of worms are controlled differently. The phase sequence and the different speeds drive the turbine to rotate, so that there is no interference between the worms and the turbine to ensure stable operation of the structure. At the same time, since the worm is a self-locking structure, if only one of the worms is activated, and the other worm does not rotate, the worm wheel does not rotate, so that only one of the worms can be rotated, the worm The rotation causes the gap between the teeth of the worm and the teeth of the turbine to gradually decrease. When the rotating worm continues to rotate, its teeth interact with the teeth of the turbine, and there is a worm along the turbine. The thrust in the axial direction, which acts on the teeth of the turbine, that is, the circumferential force of the turbine in its circumferential direction, so that the rotation of the worm continuously eliminates the gap between the teeth of the worm and the turbine, when each worm is Clearance between turbines After being completely eliminated, the worm and the teeth of the turbine fit closely together, and at this time, the release of the turbine can be released by the remaining worms (the remaining worms rotate at a lower speed than the previous worm), and the turbine is controlled to rotate without hesitation. . Since the gapless rotation between the worm and the turbine can be realized, before the sun tracking system needs to be controlled for tracking, the previous worm is used to eliminate the gap. At this time, only the remaining worm rotation is started, and the turbine rotation can be immediately driven, thereby achieving no Gap tracking, meeting the tracking accuracy requirements of the sun tracking system. At this time, the teeth of the former worm are in close contact with the teeth of the turbine, and the turbine is driven by the rotation of the preceding worm, and the remaining worms and the preceding worm jointly drive the turbine at different phase sequences and different rotational speeds. Rotating, but slower, so the teeth of the remaining worms will also be in close contact with the teeth of the turbine, but the force of the previous worm and the rest of the worm acting on the turbine is just the opposite, that is, the teeth of the previous worm are always A circumferential thrust is applied to the teeth of the turbine, while the teeth of the remaining worms always apply a circumferential resistance to the teeth of the turbine, so that the force of the front worm and the remaining worms against the turbine is always opposite. The performance of the former worm drive turbine rotation, the remaining worms hinder the turbine rotation, and gradually release the limitation of the turbine. Due to the different loads of the different function worms, under the control system, the speed of all the worms is always dynamic after eliminating the gap. Balance; achieve no-gap drive turbine rotation (if the remaining worm does not rotate, does not gradually release the limitation of the turbine, due to the turbine The self-locking function of the rod structure, the former worm can not drive the turbine to rotate). By adopting the adaptive slewing device for sun tracking of the invention, the gap generated by the manufacture and assembly of the slewing bearing device of the invention is completely eliminated, and the plurality of worms are controlled to jointly drive the turbine rotation in different phase sequences and different rotation speeds. Achieve gapless drive turbine rotation. Although the sun tracking system is located outdoors, there are a plurality of worms around the turbine, that is, the circumference of the turbine is limited by the worm, and the worms are pre-tightened with each other, so that the turbine is completely restrained in the circumferential direction, so that Vibration and other phenomena occur, making the slewing support device last longer. The adaptive swivel device for sun tracking of the present invention can be used for the transmission of the azimuth control system of the sun tracking system, as well as for the transmission of the altitude angle control system. At the same time, the invention is suitable for sun tracking The oscillating device, a plurality of worms can rotate in the same direction or in the opposite direction according to the direction of rotation and the cooperation with the turbine, so as to ensure that the phase sequence and the different speeds are combined at different times, and the same trend is achieved; Turn.

The adaptive slewing device for sun tracking of the present invention is controlled by a control system between a plurality of worms, and the control system can be adaptively modified to change the phase difference Δ Τ and the rotational speed difference Δ V between the plurality of worms. , eliminate the transmission gap.

Since the above structure is adopted, the phase difference value Δ Τ and the rotational speed difference Δ ν data in the control chip can be changed by the adaptive correction function of the program in the control system, and the start time difference between the plurality of worms is changed, thereby eliminating The transmission gap gradually generated by wear during work has the gap automatically generated by the wear compensation, and the tracking accuracy can be corrected at the same time, and the long-term gapless drive tracking of the solar tracker is realized, and the adaptive slewing device for sun tracking of the present invention is used. There are two worms symmetrically distributed around the turbine, which are a dynamic worm and a fine-controlled worm, and the dynamic worm and the fine-controlled worm are both meshed with the turbine, and simultaneously realize the same trend at different time phases and different rotational speeds. The turbine is rotated without gaps; the control system is controlled by the control system between the power worm and the fine control worm. The control system can be adaptively modified to change the phase difference Δ Τ and the speed difference Δ V between the power worm and the fine worm worm. Eliminating the transmission clearance, due to the above structure, two worms are symmetrically distributed at both ends of the turbine. They are the power worm and the fine control worm. The two worms jointly drive the turbine to rotate in different phase sequences and different speeds to ensure that the two worms do not interfere with the rotation of the turbine when they rotate. At the same time, since the turbo chopper is a self-locking structure, if only the power worm is rotated, and the fine control worm does not rotate, the worm wheel does not rotate, so that only the dynamic worm can be rotated, and the rotation of the dynamic worm makes the dynamic worm The gap between the gear teeth and the gear teeth of the turbine is gradually reduced. When the power worm continues to rotate, its gear teeth interact with the gear teeth of the turbine, and there is a thrust on the turbine in the direction of the dynamic worm axis. The thrust acts on the teeth of the turbine, that is, the circumferential force of the turbine in its circumferential direction, causing the rotation of the power worm, Continuously eliminate the gap between the teeth of the two worms and the teeth of the turbine. When the clearance is completely eliminated, the teeth of the force worm are closely fitted with the teeth of the turbine.

Dynamic (the fine-controlled worm rotates at a lower speed than the dynamic worm) to control the turbine's no-gap rotation. Since the gapless rotation between the worm and the turbine can be realized, before the sun tracking system needs to be controlled for tracking, the power worm is started to eliminate the gap. At this time, only the fine worm rotation is started, and the turbine rotation can be immediately driven to realize the gapless tracking. When the tracking position is reached, the fine-tuning worm can be turned off immediately to meet the tracking accuracy requirements of the sun tracking system. At this time, the gear teeth of the power worm are in close contact with the gear teeth of the turbine, and the turbine is driven by the rotation of the power worm, and the fine control worm and the power worm jointly drive the turbine to rotate at different phase sequences and different rotational speeds, but The speed is slower, so the gear teeth of the fine-tuning worm will also be in close contact with the gear teeth of the turbine, but the force of the power worm and the fine-controlled worm acting on the turbine is just opposite, that is, the gear teeth of the power worm are always toward the turbine. The teeth exert a circumferential thrust, while the teeth of the fine-tuned worm always apply a circumferential resistance to the gear teeth of the turbine, so that the force of the power worm and the fine-controlled worm to the turbine is always opposite. The power worm drives the turbine to rotate, and the fine control worm blocks the turbine rotation, and gradually releases the restriction on the turbine to realize the turbine rotation without gaps. (If the fine control worm does not rotate, the turbine is not gradually released, due to the worm structure. With the lock function, the power worm cannot drive the turbine to rotate). By adopting the adaptive slewing device for sun tracking of the invention, the gap generated by the manufacture and assembly of the slewing support device of the invention is completely eliminated, and the plurality of worms are controlled to drive the turbine to rotate in different phase sequences and different rotational speeds. The gap generated by the wear during the manufacturing gap and the movement can be eliminated, and the turbine rotation without the gap can be realized. Two worms are arranged around the turbine, and the two worms are symmetrically distributed, so that the turbine is restrained by the worm, so that the turbine is completely restrained in the circumferential direction, and no vibration or the like occurs, so that the slewing support device has a longer life. The adaptive swivel device for sun tracking of the present invention can be used for the transmission of the azimuth control system of the sun tracking system, as well as for the transmission of the altitude angle control system. Adaptive slewing for sun tracking of the present invention The two worms can be rotated in the same direction or in the opposite direction according to the direction of rotation and the cooperation with the turbine to ensure that the phase sequence and the different speeds are combined at different times, and the same trend is achieved without gap full wheel rotation. At the same time, through the adaptive control correction system program, changing the control chip ^'';. Phase sequence difference and speed difference Δ Τ AV data, change start time difference between the two worm, thereby eliminating the work of The transmission gap gradually generated by wear during the process has the gap that automatically compensates for the wear, and can correct the tracking accuracy, and realize the long-term gapless drive tracking of the sun tracker.

In the adaptive revolving device for sun tracking of the present invention, the power worm is connected to a power motor, and the fine control worm is connected to the fine motor.

Since the above structure is adopted, the rotation of the control power worm can be controlled by controlling the power motor, and the rotation of the fine control worm can be controlled by controlling the fine control motor, and the power motor and the fine control motor control the corresponding worm through the PLC or the single chip microcomputer. The turbine is rotated together in different phase sequences and different rotational speeds, so that the gap existing between the worm and the worm gear can be eliminated. The gap is the gap generated by the wear during the manufacturing gap and the movement, so that the sun tracking system has no gap tracking. Automation and intelligence.

In the adaptive revolving device for sun tracking of the present invention, the raceway of the turbine is engaged with the slewing inner bore by two rows of balls to relatively rotate the slewing bearing and the turbine.

Due to the above structure, the double-row ball type slewing bearing is adopted, and the steel ball is directly discharged into the upper and lower raceways, and the upper and lower rows of balls and raceways are rationally designed according to the force condition. In the double row ball type slewing bearing, the upper and lower circular races have a bearing angle of 90°, and the double volleyball type slewing bearing has a large axial and radial size and a firm structure. Compared with the traditional single-row four-point contact ball slewing bearing, it can withstand more overturning moment and axial force. Under the same working condition, it can use the smaller model size to provide the same load, and the operation is more stable, which is very suitable for the sun tracking system. The required requirements for smooth operation of low speed and large loads.

The adaptive slewing device for sun tracking of the present invention, the slewing bearing mainly adopts an upper support The block is composed of a lower support block, and the upper support block and the lower support block are respectively loaded from the two ends of the turbine to the inner side of the turbine. Since the above structure is used, the assembly is performed in this manner, and the ball and the upper and lower support blocks are rolled to the turbine. The inside of the road is extremely convenient, and when the parts are damaged, it is easy to disassemble and replace.

The working method of the solar tracking system of the adaptive revolving device for sun tracking of the present invention is characterized in that:

1). The sun tracking system is required to achieve tracking, that is, when the turbine is reversing, the power motor is started first, and the power worm is driven to rotate, and the speed of the power worm is VI;

2). The power motor rotates for T seconds to ensure the fit between the power worm and the gear teeth of the turbine, the fine control worm and the gear teeth of the turbine, and there is no gap;

3). Restart the fine control motor to drive the fine control worm to rotate. The speed of the fine control worm is V2, and Vl> V2. The fine control worm and the power worm share the same trend to drive the turbine to rotate. The dynamic worm and the fine control The worms are all in contact with the teeth of the turbine, and there is no gap, and the power worm always pushes the turbine to rotate, and the fine control worm is always in a state of releasing the turbine;

4) The turbine rotates to eliminate the transmission gap between the two worms and the teeth of the turbine and the gap generated during assembly, thereby achieving the gapless drive of the tracker.

Since the above method is used, it is first necessary to control the power motor to drive the power worm to rotate, and the gear teeth of the power worm gradually reduce the gap between the power and the turbine. When the worm rotates for T seconds, the gear teeth of the power worm and the turbine The gear teeth are closely attached, the teeth of the fine control worm are closely attached to the teeth of the turbine, and the gap existing between the teeth is eliminated. The T seconds are determined according to the rotation speed of the power worm and the gap between the teeth. Controlled by the PLC or MCU according to the preset program. When the power motor rotates and the clearance is completely eliminated, the power motor cannot continue to rotate at this time (the power motor uses the constant torque output in the electronic control mode, and always maintains the required torque. It does not damage the motor. At this point, the direction of the force that the power worm and the fine-tuning worm act on the turbine is just the opposite. When the gap is removed, start the fine control worm, you need to keep two The worm drives the turbine to rotate in different phase sequences and different rotational speeds. Through the adaptive correction of the program, the phase difference and the rotational speed difference data in the control chip are changed, and the transmission gap which is gradually generated by the wear during the working process is eliminated, and The precision worm rotates at a slower speed than the dynamic worm, so that the power worm always drives the turbine to rotate. The fine worm always limits the turbine rotation and releases the turbine rotation. Because of the different speeds of the two worms, the two worms act on The direction of the force on the turbine is just the opposite. Due to the large speed of the power worm, the gear teeth always apply a thrust along the circumferential direction of the turbine to the gear teeth of the turbine. Also, because the speed of the fine control worm is small, when the power worm When the turbine is driven to rotate, the teeth of the turbine will always push toward the circumferential direction of the turbine. Since the worm turbine has a self-locking function, the fine-controlled worm always applies a force opposite to the thrust to the turbine, so that the rotation of the fine-controlled worm is always at Passive state, its rotation is always used to eliminate the thrust of the turbine, that is, the precision control worm It is used to release the rotation of the turbine. Therefore, by controlling the rotation of the power worm and the fine control worm in a time-sharing manner, after the clearance is eliminated, the rotation of the unequal speed can keep the worm teeth and the teeth of the turbine closely adhered for a long time. Close, and no gap, thus achieving track-free tracking of the tracker.

The working method of the sun tracking system of the adaptive slewing device for sun tracking of the present invention, the starting zero position of the tracking system is A, and the tracking system needs to return to the starting zero position A after the daily sequel is completed, the worm turbine is The transmission clearance generated after manufacturing, assembly and long-term wear causes the tracking system to start working in the reverse direction (fine control worm start) as the starting zero position, and there is a zero error Δ Α between the original starting zero position A and In order to eliminate the zero point error Δ Α , the tracking system resets the zero point position of the tracking system to Α+ Δ 通过 through the adaptive correction function of its control system, and cooperates with the power worm and the fine control worm to eliminate the transmission gap.

Due to the above method, due to the long-term use of the worm and the wear, the transmission gap will be generated. Therefore, the position of the zero point of the daily tracking system is reversed, and the position of the reverse start (fine control worm start) is A, and the original start. There is a zero point error Δ 之间 between the zero position A, in order to eliminate the zero point error Δ A, It is necessary to re-determine the zero position to enable the turbine to rotate without gaps under the original phase difference and speed difference. Therefore, according to the pulsating damper generated during the use of the worm and the worm, the present invention continuously adjusts the starting zero position to Α+ Δ Α, so that the dynamic worm and the fine control worm can be in the original sequence difference Δ Τ Under the speed difference Δ ν, the mutual contracting trend drives the turbine to rotate, achieving precise tracking of the tracking system. The change of the zero position is realized by the adaptive correction function of the control system. The zero point reference sensor can be installed on the tracking system, the information is provided to the control system by the sensor, and then the relevant starting zero position of the control chip is changed. Under the original phase difference and speed difference, the control system generates a gap-free and precise tracking of the tracking system by controlling the dynamic worm and the fine-controlled worm to eliminate the transmission gap caused by the wear.

In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

1. The adaptive slewing device for sun tracking of the invention has a simple structure, convenient use, low cost and long service life;

2. The adaptive slewing device for sun tracking of the present invention can drive tracking with no gap for a long time, and has a gap for automatically compensating for wear;

3. The working method of the sun tracking system with the slewing support device of the invention is simple in operation and unique in method, and in combination with the slewing support device, the gap between the teeth can be effectively eliminated, and the tracker is free of gaps. drive.

DRAWINGS

The invention will be illustrated by way of example and with reference to the accompanying drawings in which:

1 is a schematic structural view of a slewing support device used in a conventional sun tracking system; FIG. 2 is a schematic structural view of a conventional external gear single-row four-point contact ball type slewing device; FIG. 3 is a slewing support device of the invention. Schematic diagram of the structure used on the sun tracking system; FIG. 4 is a schematic structural view of the slewing support device of the invention; Figure 5 is a cross-sectional view taken along line AA of Figure 4;

Figure 6 is a cross-sectional view taken along line B-B of Figure 4;

Figure 7 is a cross-sectional view taken along line D-D of Figure 4 .

Marked in the figure: 1-Solar battery pack, 2-single-drive slewing ring, 3-column, 4-height angle drive, 5-azimuth slewing ring, 6-height angle slewing ring, 5a-turntable housing, 5b-power Motor, 5c- precision control motor, 5d-powered worm, 5e-precision worm, 5f-turbo, 5g-ball, 5h-slewing bearing.

detailed description

All of the features disclosed in this specification, or steps in all methods or processes disclosed, in addition to mutually exclusive features and/or steps, may be combined in any manner.

Any feature disclosed in this specification (including any additional claims, abstracts and drawings) may be replaced by other equivalents or alternative features, unless otherwise stated. That is, unless specifically stated, each feature is only one example of a series of equivalent or similar features.

Embodiment 1 : As shown in FIG. 3 to FIG. 7 , an adaptive revolving device for solar tracking of the present invention is disposed on a bracket of a solar cell module 1 , and the adaptive revolving device includes an azimuth slewing support 5 and Or a height-angle slewing support 6, the azimuth slewing support 5 and/or the slewing slewing support 6 includes a turntable housing 5a, in which the turbine 5f is disposed, the turbine is connected to the solar cell assembly, The turbine 5f is symmetrical about two worms, respectively a power worm 5d and a fine worm 5e, and the power worm 5d and the fine worm 5e are both meshed with the turbine 5f, and the turbine 5f rotates, power The worm 5d and the fine control worm 5e are rotated, the power worm 5d is connected to the power motor 5b, and the fine control worm 5e is connected to the fine control motor 5c, and both the dynamic worm 5d and the fine control worm 5e are kept with the turbine 5f. Engage, and at different time phases and different speeds, the same trend together achieve the gapless drive turbine 5f rotation, eliminating the assembly gap between the worm and the worm; the power worm 5d and the fine control worm 5e are controlled by the control system The control system may be adaptive modifications, changes and fine power control worm worm 5d 5e The phase difference Δ Τ between the worms and the speed difference AV, which eliminates the transmission gap, which refers to the transmission gap gradually generated by the wear during the working process, and the phase difference value Δ Τ means two The starting time phase sequence of a worm Xuan', the speed difference is the difference between the speeds of the two worms, that is

The power worm 5d and the fine control worm 5e can be set to rotate in the same direction or in the opposite direction according to the direction of rotation and the installation position. When the power worm 5d and the fine control worm 5e are rotated in the same direction, and the driving device is mounted on the same side, Then the two worms must rotate in the same direction. If the rotation directions of the two worms are opposite, they will rotate in the opposite direction. Correspondingly, if the driving devices of the two worms are mounted on different sides, at this time, the rotation directions of the two worms are the same, then mutual In the reverse rotation, the rotation directions of the two worms are opposite, and they need to rotate in the same direction. The specific form can be arbitrarily selected according to actual needs. The two worms of the present invention can realize the non-gap driving turbine 5f rotation together with the same trend at different time phases and different rotational speeds. It should be understood that the two worms cooperate with each other and simultaneously mesh with the turbine 5f, but according to actual needs, The rotation start time between the two worms is different, and the rotation speed is different, and the rotation direction is different. However, the control system can be combined with the above conditions to ensure that the two worms can cooperate together under the same conditions. The trend is to achieve a gapless drive turbine 5f rotation. The control system is controlled by the control system between the power worm 5d and the fine control worm 5e. The phase difference Δ T between the power worm 5d and the fine control worm 5e and the speed difference ΔV are changed to eliminate the transmission gap. Mainly because when the worm and worm are used for a period of time, a certain rotation gap will be generated due to wear. If the gap is not corrected, the dynamic worm 5d and the fine worm 5e still follow the original phase difference and rotation. The difference drives the turbine 5f to rotate. Due to the existence of the transmission gap, the power worm 5d never runs through the transmission gap, and the fine control worm 5e has already rotated, so that the accuracy of driving the turbine 5f is deteriorated, so it is necessary to eliminate The transmission gap, the invention is to change the phase sequence difference Δ Τ and the speed difference difference AV between the power worm 5d and the fine control worm 5e worm by the adaptive correction function of the control system, thereby eliminating the transmission gap and achieving no gap. track.

The inner ring of the turbine 5f is engaged with the slewing ring 5h by two rows of balls 5g, so that the slewing bearing 5h Rotating relative to the turbine 5f, the slewing ring 5h is mainly composed of an upper support block and a lower support block, and the upper support block and the lower support block are respectively fitted from the both ends of the turbine 5f to the inside of the turbine 5f. Adopting the ball type slewing bearing, the steel ball is directly discharged into the upper and lower raceways. According to the force condition, the double row ball type back 4 support is adopted, and the steel ball is directly discharged into the upper and lower raceways. According to the force condition, the upper and lower two are rationally designed. Rowing balls and raceways. In the double volleyball type slewing bearing, the upper and lower circular races have a bearing angle of 90°, and the double volleyball type slewing bearing has large axial and radial dimensions and a firm structure. Compared with the traditional single-row four-point contact ball slewing bearing, it can withstand more overturning moment and axial force. Under the same working condition, it can use the smaller model size to provide the same load, and the operation is more stable, which is very suitable for the sun tracking system. The required low speed, large load and smooth line requirements.

The adaptive swivel device for sun tracking of the present invention can be used for the transmission of the azimuth control system of the sun tracking system, as well as for the transmission of the altitude angle control system.

According to the structural principle of the adaptive slewing device for sun tracking according to the present invention, a plurality of worms may be disposed around the turbine 5f, and the plurality of worms are meshed with the turbine, and the plurality of worms are controlled at different phase sequences and different rotation speeds. Cooperating the turbine to rotate, so that some worms push the turbine 5f to rotate, some worms release the turbine 5f, and the rotation of each worm cooperates with each other to realize the gapless tracking of the tracker. The most important thing is that the speed of these worms is different, and the principle of time-sharing control and software correction of the gap compensation amount can be used to maintain the close contact between the teeth of the worm and the teeth of the turbine for a long time without gaps. Trackless tracking of the tracker. The control system is controlled by a plurality of worms. The control system can be adaptively corrected to change the phase sequence difference Δ Τ and the speed difference A V between the multiple worms to eliminate the transmission gap and ensure tracking accuracy.

The working method of the sun tracking system of the present invention equipped with a slewing support device is achieved by the following steps:

1). The sun tracking system is required to achieve tracking, that is, when the turbine 5f is reversing, the power motor 5b is started first. Driving the power worm 5d to rotate, the speed of the power worm 5d is VI;

2). The power motor 5b rotates for T seconds to ensure the between the power worm 5d and the gear teeth of the turbine 5f ^;耩_:耩 Between the worm 5e and the teeth of the turbine 5f, and there is no gap;

3). Restart the fine control motor 5c, drive the fine control worm 5e to rotate, and the fine control worm 5e and the dynamic worm 5d rotate in different phase sequences and different rotation speeds, and drive the turbine 5f to rotate together with the same trend, the fine control worm 5e The rotational speed is V2, and Vl>V2; the teeth of the dynamic worm 5d and the teeth of the fine control worm 5e are fitted with the teeth of the turbine 5f, and there is no gap, and the dynamic worm 5d always pushes the turbine 5f to rotate. The fine control worm 5e is always in a state of releasing the turbine 5f;

4) The turbine 5f rotates to eliminate the gap between the two worms and the teeth of the turbine 5f and during assembly, thereby achieving gapless driving of the tracker.

The adaptive slewing device for sun tracking of the present invention has the following structural features: a set of worms is added to the conventional solar tracker, and the gaps generated by the wear during the manufacturing gap and the movement process are eliminated by a specific control mode. No gap tracking.

The control process is as follows: when starting the tracking, the power motor 5b is started first, and the power required during the tracking process is provided (the power motor 5b reaches the constant torque output through the control element), at which time the fine control motor 5c does not start, and the power motor 5b drives the power motor 5b. The connected power worm rotates, and the power worm drives the worm wheel 5f to transmit the torque to the fine control worm connected to the fine motor 5c, and the teeth of the turbine 5f and the teeth of the power worm 5d and the teeth of the fine control worm are mutually Fit, because the worm is a self-locking structure, the fine-controlled worm does not rotate at this time, and the worm wheel does not rotate. At this time, the gap generated by the manufacture and assembly of the slewing support is completely eliminated by the power motor 5b. After starting the power motor 5b, the delay (time is set according to the specific swing support manufacturing and assembly gap value) starts the fine control motor 5c, and the fine control motor 5c rotates in the same direction or in the opposite direction to drive the turbine to rotate together, and the fine control motor The rotation speed of 5c is slightly lower than that of the power motor 5b. The function of the power motor 5b is always pushing the worm wheel to rotate, and the fine control motor 5c is always releasing the turbine 5f. That is, the rotational motion of the turbine 5f is always tightly locked by the worm controlled by the power motor 5b and the fine motor 5c, thereby achieving gapless driving. Reverse movement of the same principle, the twin-screw slewing 'go with _¾ body positions are determined by precise control motor 5c.

For the adaptive slewing device for sun tracking of the present invention, the starting zero position of the tracking system is that the tracking system needs to track the sun at sunrise, and at sunset, the tracking system needs to return to the starting zero position A, In order to continue tracking on the second day, the gap between the worm turbine and the manufacturing process will increase, and the starting zero point of the actual return of the tracking system will be A', the actual return The starting zero position is A, and there is a zero error Δ Α between the original starting zero position A. To eliminate the zero error Δ Α, the tracking system resets the zero position of the tracking system by the adaptive correction function of its control system. Α+ Δ Α, so that the dynamic worm and the fine-controlled worm can jointly drive the turbine rotation under the original phase sequence difference Δ Τ and the speed difference Δ ν to achieve accurate tracking of the tracking system. The above-mentioned transmission gap is expressed on the circumference of the turbine 5f as the clearance correction value. The cause of the clearance correction value is caused by the gap in the manufacturing assembly process and the wear and the like after a period of use. The correction value can be based on the installation of the device. Different individual differences of each turntable are set in the field in the software, which is reflected as the comprehensive maximum gap of the worm slewing support. When a new gap is generated due to wear (1 or 2 years) after a period of use, it can be controlled according to the control. The system's adaptive correction function, convenient correction value at any time, long-term gapless drive tracking, and automatic compensation for the gap generated by wear, to ensure the tracking accuracy of the sun, to achieve solar-free tracking.

Embodiment 2: An adaptive slewing device for sun tracking is disposed on a bracket of a solar cell module 1, the adaptive slewing device comprising an azimuth slewing support 5 and/or a height slewing support 6, the azimuth slewing support 5 and The height slewing ring 6 includes a turntable housing 5a that is coupled to the solar cell module, and a turbine 5f fixedly coupled to the column 3 is disposed in the turntable housing 5a, and the circumference of the turbine 5f is symmetrical. There are two worms respectively, a power worm 5d and a fine control worm 5e, and the movement Both the force worm 5d and the fine control worm 5e mesh with the turbine 5f, and when the turbine 5f rotates, the power i^f jd and the fine control worm 5e rotate, and the power worm 5d is connected to the power motor 5b, the fine control i^ f 5e is connected to the fine control motor 5c, and the power motor 5b and the fine control motor 5c are respectively connected to the rotary housing 5, and the dynamic worm 5d and the fine control worm 5e are both kept engaged with the turbine 5f, and In different phase sequences and different speeds, the same trend together realizes the gapless driving turbine 5f rotation, eliminating the assembly gap between the worms and worms; wherein the inner cymbal of the turbine 5f is engaged with the slewing bearing 5h through the two rows of balls 5g, The slewing ring 5h is rotated relative to the turbine 5f. The slewing ring 5h is mainly composed of an upper support block and a lower support block. The upper support block and the lower support block are respectively inserted from the two ends of the turbine 5f to the inside of the turbine 5f. The support block is connected to the turntable housing 5a.

In the above structure, since the turbine is fixedly coupled to the column, after the motor is started, the worm, the turntable housing and the slewing ring rotate together around the turbine, thereby driving the solar cell module connected to the turntable housing to rotate. Other structures, working methods, and technical effects produced are substantially the same as in Embodiment 1.

The invention is not limited to the specific embodiments described above. The invention extends to any new feature or any new combination disclosed in this specification, as well as any novel method or process steps or any new combination disclosed.

Claims

1. An adaptive slewing device for sun tracking, disposed on a bracket of a solar cell module (1), characterized in that: the adaptive slewing device comprises an azimuth slewing support (5 > and/or a height slewing support ( 6), the azimuth slewing support (5) and/or the slewing slewing support (6) comprises a turn housing (5a), and the turntable housing (5a) is provided with a turbine (5f), the turbine At least two worms are disposed around (5f), and the plurality of worms are simultaneously meshed with the turbine (5f), and at different time phases and at different rotational speeds, the same trend is used to achieve the movement of the gapless drive turbine (5f).

2. The adaptive slewing apparatus for sun tracking according to claim 1, wherein: the plurality of worms are controlled by a control system, and the control system can adaptively correct and change the phase sequence between the plurality of worms. The difference ΔΤ and the speed difference Δν eliminate the transmission gap.

3. The adaptive revolving device for sun tracking according to claim 1 or 2, wherein: the turbine (5f) has two worms around the circumference, respectively a power worm (5d) and fine control The worm (5e), and the dynamic worm (5d) and the fine control worm (5e) are both meshed with the turbine (5f), and at the different time phases and at different rotational speeds, the same trend is used to realize the gapless drive turbine (5f Rotation; The control between the power worm (5d) and the fine control worm (5e) is controlled by the control system. The control system can be adaptively modified to change the phase difference Δ between the dynamic worm (5d) and the fine worm (5e). T and the speed difference Δ V, eliminating the transmission gap.

4, the rotary device as claimed in adaptive for solar tracking according to claim 3, wherein: said power worm (5d) is connected to the power of the motor ⁽⁵ b), the fine control of the worm ⁽⁵ e) connecting Go to the fine motor ( 5c ).

5. The adaptive revolving device for sun tracking according to claim 1 or 2 or 4, characterized in that: the raceway of the turbine (5f) passes through two rows of balls (5g) and slewing bearings (5h) The 圏 is connected to rotate the slewing ring (5h) and the turbine (5f).

6. The adaptive revolving device for sun tracking according to claim 5, wherein: said slewing bearing (5h) is mainly composed of an upper support block and a lower support block, wherein the upper support block and the lower support block are respectively Both ends of the turbine (5f) are placed inside the turbine (5f).

A method of operating a solar tracking system equipped with an adaptive slewing device for sun tracking as claimed in claim 3 or 4 or 5 or 6, characterized in that: 1). The sun tracking system is required to achieve tracking, that is, when the turbine (5f) is reversing, the power motor (5b) is started first, and the driving power worm (5d) is rotated, and the speed of the power worm (5d) is VI;

2). The power motor (5b) rotates for T seconds to ensure the fit between the power worm (5d) and the turbine (5f)' (tooth), the fine control worm (5e) and the turbine (5f) teeth. , and without gaps;

3) Restart the fine control motor (5c) to drive the fine-tuning worm (5e) to rotate. The fine-controlled worm (5e) rotates at V2, and Vl>V2, fine-tuned worm (5e) and dynamic worm (5d) The same trend drives the turbine (5f) to rotate. The dynamic worm (5d) and the fine-tuned worm (5e) are fitted to the teeth of the turbine (5f) without gaps. The dynamic worm (5d) always pushes the turbine ( 5f) rotation, the fine control worm (5e) is always in the state of releasing the turbine (5f), and due to the different load, the fine control worm (5e) and the dynamic worm (5d) are under the control system The speed is always in dynamic balance after eliminating the gap;

4) The turbine (5f) rotates to eliminate the transmission gap between the teeth of the two worms and the turbine (5f) and the gap generated during assembly, so as to realize the gapless driving of the tracker.

8. The method of operating a solar tracking system for an adaptive slewing device for sun tracking according to claim 7, wherein: in said step 2), the T seconds of the rotation of the power motor (5b) is based on the power The speed of the worm and the clearance between the worm and the turbine teeth are determined.

9. The method of operating a solar tracking system for an adaptive slewing device for sun tracking according to claim 7, wherein: the tracking system can reset the tracking system by an adaptive correction function of its control system. The zero position is Α+ΔΑ, which eliminates the starting zero position A' of the actual regression of the tracking system, and the zero point error ΔΑ between the original starting zero point position A, and cooperates with the dynamic worm (5d) and the fine control worm (5e). , eliminate the transmission gap.

10. The method of operating a solar tracking system for an adaptive slewing device for sun tracking according to claim 9, wherein: the change in the position of the zero point is achieved by an adaptive correction function of the control system. By installing a zero-point reference sensor on the tracking system, the sensor is used to provide information to the control system, and then by controlling the relevant starting zero position of the control chip, by controlling the dynamic worm and the fine-controlled worm under the original phase difference and speed difference Eliminate the drive gap caused by wear.