CN118041202A

CN118041202A - Rotary support assembly and photovoltaic single-axis tracking support

Info

Publication number: CN118041202A
Application number: CN202410200475.9A
Authority: CN
Inventors: 郭家宝; 刘霄
Original assignee: SHANGHAI MOKUN NEW ENERGY TECHNOLOGY CO LTD
Current assignee: SHANGHAI MOKUN NEW ENERGY TECHNOLOGY CO LTD
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2024-05-14
Also published as: CN114039537A

Abstract

The invention discloses a rotary support assembly and a photovoltaic single-shaft tracking support, which are used for rotatably supporting a main beam of the photovoltaic single-shaft tracking support on a stand column, wherein the main beam is provided with the photovoltaic assembly, the rotary support assembly comprises a guide piece and a matching piece, the guide piece comprises an arc guide rail, the arc guide rail is provided with a central axis and an arc length direction, the matching piece is movably matched with the arc guide rail, the matching piece is movably arranged along the arc length direction relative to the arc guide rail, a first side of the main beam is connected with the guide piece, a second side of the main beam is connected with the matching piece, the main beam is rotatably supported on the stand column around the central axis, and the arc guide rail is arranged around the main beam, so that the central axis is positioned between the lower surface of the main beam and the upper surface of the photovoltaic assembly. The invention further provides a photovoltaic single-axis tracking bracket comprising the rotary support assembly. By adopting the rotary support assembly, the coincidence of the rotation center and the gravity center is easy to realize.

Description

Rotary support assembly and photovoltaic single-axis tracking support

The application discloses a divisional application of a rotating support assembly and a photovoltaic single-shaft tracking bracket, wherein the application number of a parent application is 202111392381.9, and the application date is 2021.11.23.

Technical Field

The invention relates to a rotary support assembly, in particular to a rotary support assembly and a photovoltaic single-axis tracking bracket.

Background

In a photovoltaic power generation system, a flat single-axis tracking support is used as one of the most commonly used photovoltaic array supports, and is also called a photovoltaic single-axis tracking support. The photovoltaic single-axis tracking bracket can track the change of the azimuth angle of the sun in the daytime. Therefore, compared with the optimal fixed inclination angle bracket, the total annual power generation amount can be 15% -25% higher when the photovoltaic single-shaft tracking bracket is used for supporting the photovoltaic module.

The photovoltaic single-shaft tracking support is required to rotate around the shaft, and the photovoltaic module is generally supported by arranging a main beam in the middle, is installed and supported above the main beam and rotates around the shaft by taking the center of the main beam as the shaft center along with the main beam, so that the change of the sun from east to west can be tracked.

When the structure is adopted, when the main beam center is taken as a rotation axis to rotate around the shaft, the whole rotation assembly can generate larger eccentric bending moment, so that larger eccentric load is brought to the driving of the tracking bracket, and the driving device of the tracking bracket is in a high-load running state for a long time. In this way, not only is it necessary to configure a more powerful drive device, but the service life of the drive device is also greatly affected.

The inventor analyzes that if the rotation center is set to coincide with the center of gravity of the rotation assembly, for example, the rotation center is set at a certain position between the main beam and the photovoltaic assembly, so as to realize balanced support, dynamic driving load of the driving device of the photovoltaic single-axis tracking bracket is greatly reduced, and tracking driving becomes very light and flexible.

Therefore, it is necessary to provide a photovoltaic single-axis tracking support, which is easy to realize the coincidence of the rotation center and the gravity center, thereby realizing the balanced support of the photovoltaic module.

Disclosure of Invention

The invention aims to provide a rotary support assembly and a photovoltaic single-axis tracking bracket, which are easy to realize the coincidence of a rotation center and a gravity center.

The invention provides a rotary support assembly which is used for rotatably supporting a main beam of a photovoltaic single-shaft tracking bracket on a stand column, wherein the main beam is supported with a photovoltaic assembly. The rotary support assembly comprises a guide member and a mating member; the guide piece comprises an arc guide rail, wherein the arc guide rail is provided with a central axis and an arc length direction; the matching piece is movably matched with the circular arc guide rail and is movably arranged along the arc length direction relative to the circular arc guide rail; the first one of the main beam and the upright is connected to the guide member, the second one is connected to the mating member, whereby the main beam is rotatably supported on the upright about the central axis, and the circular arc guide rail is arranged around the main beam such that the central axis is located between the lower surface of the main beam and the upper surface of the photovoltaic module.

In one embodiment, the circular arc guide is arranged such that the center of gravity of a rotating assembly is located on the central axis, the rotating assembly being made up of the main beam and other assemblies that rotate following the main beam.

In one embodiment, the main beam is connected to the guide member such that both ends of the circular arc guide rail in the arc length direction are located at both sides of the main beam, respectively.

In one embodiment, the mating element is in contact with the arcuate guide rail at least two points along the arcuate length.

In one embodiment, the circular arc guide rail is a circular arc guide groove; the matching piece comprises a first roller group, the first roller group is composed of at least two rollers distributed along the arc length direction, and the matching piece is in rolling fit with the arc guide groove at least two positions through the first roller group.

In one embodiment, the fitting further comprises a second roller set axially spaced from the first roller set, wherein axial direction is the direction in which the central axis extends; each roller in the second roller group and the corresponding roller in the first roller group form a roller pair, and two rollers of each roller pair are coaxially arranged and are respectively in rolling fit with the circular arc guide groove.

In one embodiment, the guide member has two surfaces in the axial direction, the guide member is provided with an arc groove on each of the two surfaces, and the arc groove is formed by the two arc grooves corresponding to the two surfaces respectively; the two rollers of each roller pair are respectively matched with the two arc grooves in a rolling way.

In one embodiment, the rotary support assembly further comprises a first connection assembly comprising two risers distributed along an axial direction, the two risers being respectively provided with an axle protruding towards each other, the two rollers of each roller pair being respectively rollably supported by the axles of the two risers, the two risers being connected to the second party.

In one embodiment, the two ends of the circular arc guide rail along the arc length direction are provided with stop pieces for preventing the matching pieces from falling out of the circular arc guide rail.

The invention also provides a photovoltaic single-axis tracking bracket, which comprises a main beam, a plurality of stand columns distributed in the north-south direction and the rotating support assembly, wherein at least two stand columns in the plurality of stand columns can rotatably support the main beam through the corresponding rotating support assembly.

In above-mentioned rotatory supporting component and photovoltaic unipolar tracking support, the circular arc guide rail sets up around the girder, cooperation piece and circular arc guide rail movable fit and can be relatively along arc length direction activity each other for the girder can rotate around the central axis of circular arc guide rail, through position and the radius of curvature that set up the circular arc guide rail rationally, can realize the coincidence of center of rotation and focus easily.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

Fig. 1 is a front view of an exemplary photovoltaic single axis tracking stand according to a first embodiment.

Fig. 2 is a side view of the exemplary photovoltaic single axis tracking stent of fig. 1.

Fig. 3A is a schematic diagram illustrating a portion of a guide and a second connection assembly.

Fig. 3B is a sectional view taken along line E-E in fig. 3A.

Fig. 4A is a schematic diagram schematically illustrating a first connection assembly.

Fig. 4B is a sectional view taken along line F-F in fig. 4A.

Fig. 5A is a schematic diagram illustrating a platen of a second connection assembly.

Fig. 5B is a schematic view exemplarily showing a circular arc slider.

Fig. 5C is a cross-sectional view of the circular arc slider of fig. 5B.

Fig. 6 is a front view of an exemplary photovoltaic single axis tracking stand according to a second embodiment.

Fig. 7 is a side view of the exemplary photovoltaic single axis tracking stent of fig. 6.

Fig. 8 is a schematic diagram illustrating the tracking of rotation to an inclined state by the exemplary photovoltaic single-axis tracking stand of fig. 7.

Fig. 9 is a side view of an exemplary rotary support assembly according to a third embodiment.

Fig. 10 is a front view of the exemplary rotary support assembly of fig. 9.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, in which more details are set forth in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be limited in scope by the context of this detailed description.

In the photovoltaic single-axis tracking support, a support rotating part (hereinafter referred to as a rotating assembly) consisting of a main beam, purlines and a photovoltaic assembly is generally designed to be of a symmetrical structure, when the surface of the photovoltaic assembly of the rotating assembly is placed horizontally upwards, the gravity center of the vertical section of the support rotating part is usually positioned on the symmetrical axis above the main beam, namely the symmetrical axis between the main beam and the photovoltaic assembly, if the rotating axis (also referred to as a rotating center) supported by the stand column is designed to be coincident with the gravity center of the rotating assembly, the stand column is arranged under the main beam, the gravity center of the rotating assembly is arranged right above the main beam, one main beam is just separated in the middle, and if the stand column directly supports the rotating center, the vertical section gravity center is difficult to be coincident with the gravity center.

Therefore, the invention provides the rotary support assembly and the photovoltaic single-axis tracking bracket, which can easily realize the coincidence of the rotation center and the gravity center.

First embodiment

A first embodiment provided by the present invention will be described below with reference to fig. 1 to 6.

Fig. 1 and 2 illustrate a front view configuration and a side view configuration, respectively, of an exemplary rotary support assembly 10 for an exemplary photovoltaic single axis tracking stand 100 according to a first embodiment. It is to be understood that the drawings are by way of example only and are not drawn to scale and should not be construed to limit the true scope of the invention.

As previously described, the photovoltaic single axis tracking stand 100 may include the main beams 20 and the uprights 30. Fig. 1 and 2, and subsequent fig. 6 and 7, etc. show up, down, south, north, east, west, for convenience of description, according to the normal state of the photovoltaic single-axis tracking stand 10. The main beams 20 generally extend in a north-south direction, and the columns 30 extend in an up-down direction (or vertical direction) while standing on the ground G0. The photovoltaic single axis tracking bracket 100 may include a plurality of posts 30 distributed in a north-south direction such that the main beam 20 can straddle the plurality of posts 30 in the north-south direction. It is understood that "plurality" herein means more than two, including two, three, four, five, etc.

In fig. 1 and 2, a rotational support assembly 10 is used to rotatably support a main beam 20 of a photovoltaic single axis tracking bracket 100 on a column 30. The main beam 20 supports a photovoltaic module 40 thereon. In this way, the photovoltaic module 40 is supported by the main beams 20 so as to be able to rotate with the main beams 20, thereby tracking the sun's variations. That is, the photovoltaic module 40 may be rotatably supported by the photovoltaic single axis tracking bracket 100.

It will be appreciated that the formation of a first feature over or on a second feature described in this specification may include embodiments in which the first and second features are formed in direct communication, and may also include embodiments in which additional features are formed between the first and second features so that there may be no direct communication between the first and second features. Further, where a first element is described as being coupled or combined with a second element, the description includes embodiments in which the first and second elements are directly coupled or combined with each other, and also includes embodiments in which the first and second elements are indirectly coupled or combined with each other using one or more other intervening elements. For example, in fig. 1 and 2, the main beam 20 has a plurality of purlines 50 supported thereon, the purlines 50 being distributed in a north-south direction, each purline 50 extending generally in a east-west direction. A plurality of purlins 50 support photovoltaic modules 40 thereon. The main beams 20 may indirectly support the photovoltaic module 40 via purlins 50.

The photovoltaic single axis tracking stand 100 may include at least two rotating support assemblies 10. At least two of the aforementioned plurality of columns 30 may each rotatably support the main beam 20 by way of a corresponding rotary support assembly 10. In one embodiment, two columns 30 positioned at the southwest and northwest sides of the aforementioned plurality of columns 30 may each rotatably support the main beam 20 through one rotation support assembly 10. In another embodiment, each of the aforementioned plurality of columns 30 may rotatably support the main beam 20 by a corresponding rotary support assembly 10. In fig. 2, the photovoltaic single-axis tracking bracket 100 is in an east-west symmetrical configuration in a horizontal state, and in fig. 2, an east-west symmetry plane C0 of the whole photovoltaic single-axis tracking bracket 100 or the photovoltaic module 40 is also shown, and the symmetry plane C0 may also be called as a section vertical symmetry axis of the main beam 20.

It will be appreciated that the use of spatial relational terms such as "north," "south," "up," "down," and the like herein to describe one element or feature in relation to other elements or features in the figures is by reference to the orientation of the elements or features in the normal state of figures 1 and 2 for convenience of description and is intended to encompass other orientations of the element or component in use, operation, or transportation than that depicted in the figures. For example, if the component in the drawings is turned over, elements described as "on" other elements or features would then be oriented "under" the other elements or features, and the spatially relative descriptors used herein should be interpreted accordingly.

As shown in fig. 1 and 2, the rotary support assembly 10 includes a guide 1 and a mating member 2. The guide 1 comprises a circular arc guide rail 3. The circular arc guide rail 3 has a central axis O3 and an arc length direction C3. The fitting member 2 is movably fitted with the circular arc guide rail 3, and is movably disposed along the arc length direction C3 with respect to the circular arc guide rail 3. Here, it is understood that the mating element 2 is movable relative to the circular arc guide 3, meaning that both are movable relative to each other, and in actual practice, it may include a case where the circular arc guide 3 is stationary and the mating element 2 is movable, or may include a case where the mating element 2 is stationary and the circular arc guide 3 is movable such that there is relative movement therebetween in the arc length direction C3.

A first one of the main beams 20 and the upright 30 is connected to the guide 1 and a second one is connected to the mating member 2, whereby the main beams 20 are rotatably supported on the upright 30 about the central axis O3. Also, the circular arc guide rail 3 is arranged around the main beam 20 such that the central axis O3 is located between the lower surface 201 of the main beam 20 and the upper surface 402 of the photovoltaic module 40.

The circular arc guide rail is a guide rail extending along a circular arc line. The arc line, i.e. a part of the line, has an arc center angle alpha greater than 0 deg. and less than 360 deg.. The extending direction of the arc line, i.e., the length direction or arc length direction C3 of the arc guide rail 3. It will be appreciated that the circular arc guide 3 extends in three dimensions along a series of circular arc lines (or arc surfaces), which correspond to the line of the center or circle center of the arc, i.e. the central axis O3. The direction in which the central axis O3 extends is defined as an axial direction X0, as shown in fig. 1.

The movable fit may be, for example, a sliding fit or a rolling fit. The fitting piece 2 is movably fitted with the circular arc guide 3 while being movably arranged along the arc length direction C3, i.e. the fitting piece 2 fits with the circular arc guide 3, is guided by the circular arc guide 3 while being movable, e.g. sliding or rolling, along the arc length direction C3.

In the above-mentioned rotary support assembly 10, the fitting piece 2 and the circular arc guide rail 3 are movably fitted to each other and can move along the arc length direction C3, so that the main beam 20 can rotate around the central axis O3, and the central axis O3 of the circular arc guide rail 3, that is, the rotation center of the main beam 20, can be located between the lower surface 201 of the main beam 20 and the upper surface 402 of the photovoltaic module 40 through the arrangement of the circular arc guide rail 3 around the main beam 20, so that the rotation center of gravity can be close to, even coincide with, the center of gravity of the rotary assembly of the main beam 20, the photovoltaic module 40, and the like, thereby realizing the balanced support of the photovoltaic module 40. The central axis O3 may be located on the symmetry plane C0.

In practical engineering applications, the center of gravity of the rotating assemblies should be as close to the center of rotation as possible, but not necessarily coincident. On the premise of meeting the requirement that the eccentric bending moment is small enough, the curvature radius of the circular arc guide rail 3 can be selected to be smaller as much as possible, so that the sizes of the circular arc guide rail 3 and the guide piece 1 are reduced, and materials are saved.

As previously described, preferably, the circular arc guide rail 3 may be arranged such that the center of gravity of the rotating assembly is located on the central axis O3. The rotating assembly is made up of a main beam 20 and other components that rotate with the main beam 20. The other components include a photovoltaic module 40 that rotates with the main beam 20, purlins 50, and the like, and in the illustrated embodiment, a guide 1 that is connected to the main beam 20 to rotate with the main beam 20. For example, the radius of the arc line along which the arc guide 3 extends may be adjusted, or the position of the arc guide 3 relative to the main beam 20 may be adjusted such that the center axis O3 coincides with the center of gravity of the rotating assembly, i.e., the center of gravity is located on the center axis O3, so that a complete balanced support may be achieved. It will be appreciated that the coincidence herein should also allow a certain tolerance range, for example, the shortest distance of the center of gravity to the central axis O3 may be allowed to be within 5mm or the like.

As previously described, the first and second sides of the main beam 20 and the upright 30 may be connected to the guide 1 and the mating member 2, respectively. In the embodiment shown in fig. 1 and 2, the girder 20 may be connected to the guide 1 such that both ends e3 of the circular arc guide 3 along the arc length direction C3 are located at both sides of the girder 20, respectively. That is, the post 30 is connected to the mating element 2. The arc guide rail 3 of the guide member 1 is longer, the guide member 1 provided with the arc guide rail 3 is connected to the main beam 20, and the guide member is tracked and rotated along with the main beam 20, so that the photovoltaic modules 40 are not easy to interfere, and the photovoltaic modules 40 can be arranged continuously.

The mating element 2 can be in contact with the circular arc guide 3 at least in two places along the arc length direction C3. In the embodiment shown in fig. 1, the mating element 2 may comprise a first roller set 4a (in fig. 1, for example, a roller set located on the south side is taken as an example). The first roller set 4a may be formed of at least two rollers 4 distributed along the arc length direction C3, and in fig. 2, there are only two rollers 4 distributed along the arc length direction C3 in the first roller set 4 a. It will be appreciated that the rollers may be collectively referred to as rollers 4 without distinguishing descriptions. The plurality of rollers 4 of the first roller set 4a supporting the main beam 20 are spaced apart from each other, so that the support of the rotating assembly is more stable.

It should be understood that the use of the terms "first," "second," and the like herein are merely used to facilitate distinguishing between corresponding features and, unless otherwise indicated, are not intended to have a special meaning and therefore should not be construed as limiting the scope of the invention.

In one embodiment, the roller 4 may be, for example, a spherical ball. Two balls (two rollers 4 constituting the first roller group 4 a) may form two point contacts with the circular arc guide rail 3 along the arc length direction C3. In another embodiment, the roller 4 may also be a cylindrical roller. The two cylindrical rollers (the two rollers 4 constituting the first roller group 4 a) may form two line contacts with the circular arc guide 3 along the arc length direction C3, the line contacts being performed along a straight line coincident with the axial direction X0. In the illustrated embodiment, the roller 41 may be a generally double sided (in fig. 1, the north and south sides) truncated spherical roller. The two truncated spherical rollers (the two rollers 4 constituting the first roller group 4 a) may form two line contacts with the circular arc guide 3 along the arc length direction C3, the line contacts being performed along the arc S1. The line contact in the form of an arc can also play a limiting role in the axial direction X0. By adopting rolling fit, smooth rotation operation can be realized without lubricant.

It is to be understood that the use of specific words to describe embodiments of the invention, such as "one embodiment," "another embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the invention. Thus, it should be emphasized and should be appreciated that two or more references to "one embodiment" or "another embodiment" in this specification at different positions are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the invention may be combined as suitable.

The guide rail may be a guide slot or a guide bar. In the illustrated embodiment, the circular arc guide rail 3 of the guide 1 may be a circular arc guide groove.

In the embodiment shown in fig. 2, the fitting piece 2 is in rolling engagement with the circular arc guide groove (as an example of the circular arc guide rail 3) at least at two places (two places in fig. 2) by the first roller group 4 a.

In the embodiment shown in fig. 1, the fitting 2 may further comprise a second roller set 4b spaced apart from the aforementioned first roller set 4a in the axial direction X0. In fig. 1, a set of rollers located on the north side is taken as a second roller set 4b. As mentioned earlier, the axial direction X0 is the direction in which the central axis O3 extends, i.e. north-south in the figure. The second roller set 4b may be constituted by at least one roller 4. For example, the second roller set 4b may be constituted by a plurality of rollers 4 distributed along the arc length direction C3.

In the illustrated embodiment, each roller 4 of the second roller set 4b may form a roller pair 44 with the corresponding roller 4 of the first roller set 4 a. That is, the second roller group 4b may also include two rollers 4 distributed along the arc length direction C3, corresponding to the aforementioned first roller group 4a including two rollers 4. Further, in the illustrated embodiment, the two rollers 4 of each roller pair 44 may be coaxially disposed and each may be in rolling engagement with the arcuate guide slot. Taking the roller pair 44 composed of two rollers 4 respectively located on the south side and the north side as an example shown in fig. 1, the rolling axes of the two rollers 4 of the roller pair 44 are identical, and both extend along the axial direction X0. With this arrangement, in which the two rollers 4 of each roller pair 44 are coaxially disposed, the stress state is better.

In another embodiment, each roller pair 44 may be arranged such that the rolling axes of its paired two rollers 4 both extend along the axial direction X0, but are not collinear. That is, the axes of the two rollers 4 of each roller pair 44 are parallel to each other but are disposed offset, for example, separately in the arc length direction C3, and also, for example, separately in the radial direction.

In other words, two rollers 4 on the same side in the axial direction X0 of the two roller pairs 44 constitute the corresponding roller groups 4a, 4b. In the figure, i.e. two rollers 4 on the south side constitute a first roller set 4a and two rollers 4 on the north side constitute a second roller set 4b.

In another embodiment, the second roller group 4b may be composed of other numbers of rollers 4 than two. For example, the second roller set 4b may be constituted by only one roller 4. The only one roller 4 may be arranged in the arc length direction C3 between the two rollers 4 of the first roller set 4a, for example, in an intermediate position between the two rollers 4. Of course, it is still offset in the axial direction X0 from the two rollers 4 of the first roller set 4 a. At this time, the rotation operation of the rotation support assembly 10 can be made smoother and less prone to jamming.

Fig. 3A and 3B show an example configuration of the guide 1. Referring to fig. 3A and 3B, the guide 1 may have two surfaces 11 in the axial direction X0.

As shown in fig. 3B, the guide 1 may be provided with a circular arc groove 31 at each of the two surfaces 11. The two circular arc grooves 31 respectively corresponding to the two surfaces 11 constitute the circular arc guide groove (as an example of the circular arc guide rail 3). The two rollers 4 of each roller pair 44 (i.e., the two rollers 4 belonging to the first roller group 4a and the second roller group 4b and coaxially disposed) may be respectively in rolling engagement with the aforementioned two circular arc grooves 31, as shown in fig. 1. The above structure of the circular arc guide rail 3 is easy to process and has low manufacturing cost.

The rotary support assembly 10 may further include a first connection assembly 5. Fig. 4A and 4B show an example configuration of the first connection assembly 5. The first connection assembly 5 may include two risers 51 distributed along the axial direction X0, and the two risers 51 may be respectively provided with a hub 52 protruding toward each other. The two rollers 4 of each roller pair 44 may be rollably supported by the wheel shafts 52 of the two risers 51, respectively, as shown in fig. 1. Two risers 51 are connected to the upright 30 as the aforementioned second example. The first link assembly 5 may rollably support the roller 4 to the upright 30 by being connected to the upright 30 by a riser 51. In fig. 1, two vertical plates 51 are arranged substantially symmetrically with respect to the vertical center line of the vertical column 30 in the north-south direction, and an axle 52 is used for mounting the roller 4.

In the illustrated embodiment, the first connection assembly 5 may further include a connection member 53. The link 53 and the vertical plate 51, etc. may integrally constitute a pedestal. For example, the connection piece 53 may be a U-shaped plate as shown in fig. 4A and 4B, including a transverse plate portion 531 and two riser portions 532 connected by the transverse plate portion 531. The two standing plates 51 may stand on the upper side of the link 53, in the drawing, on a cross plate portion 531 of a U-shaped plate as the link 53. Two riser portions 532 are used to connect the columns 30, and in particular, two riser portions 532 may be located on each side of the columns 30, e.g., the east and west sides. Each riser portion 532 may be provided with a waist hole 532a in an up-down shape (vertically extending) to fine-tune the installation height of the entire axle bracket including the riser 51 and the connection member 53, so that the main girder 20 is maintained in a horizontal state.

Both ends e3 of the circular arc guide 3 along the arc length direction C3 may be provided with stoppers 7 for preventing the fitting 2 from coming out of the circular arc guide 3. In the drawing, the circular arc guide rail 3 is a circular arc guide rail, and the stoppers 7 may be bolts mounted at both ends of the circular arc guide rail, so that both introduction ports of the circular arc guide rail can be sealed to prevent the engaging member 2 from coming out of the circular arc guide rail, that is, to prevent the roller 4 from rolling out.

In fig. 3A and 3B, the guide 1 may also have a circular arc shape extending along a circular arc line LS, which may be referred to as a bearing arc. The rotary support assembly 10 may also include a second connection assembly 6. The second connection assembly 6 may include a rib 61 surrounded by the circular arc-shaped guide 1. The rib 61 and the guide 1 may be integral and together form a generally uniform thickness flat plate shape. The rib plates 61 can connect the sections of the guide member 1 along the arc length direction C3, and enhance the strength of the entire guide member 1. The rib plate 61 may be provided with an opening 611 for avoiding the main beam 20, and the opening 611 may be surrounded by a bottom wall 61a and two side walls 61b, for example. The second connection assembly 6 may also include two connection plates 62, each connection plate 62 being generally L-shaped. The two connection plates 62 may be connected to the corners A6 at the top of the two side walls 61b, respectively, for example, by welding. In the second connection assembly 6, the U-shaped notch V6 formed after the two connection plates 62 are connected to the openings 611 of the rib plates 61 can be exactly matched with the cross section of the main beam 20, as shown in fig. 2. In fig. 3A, the U-shaped notch V6 is in the form of a rectangular recess with an upward opening.

The second connection assembly 6 may further include a pressing plate 63. Fig. 5A generally shows an example configuration of the platen 63. The pressing plate 63 may have a generally U-shape formed by bending a flat plate on both sides, including a flat plate portion 631 and bending plate portions 632 extending upward from both sides of the flat plate portion 631, as can be seen in fig. 1. The pressing plate 63 may be provided with a mounting hole 633, for example, provided to the flat plate portion 631. Referring to fig. 1 and 2 and fig. 3A and 3B, in the second connection assembly 6, each connection plate 62 may have two mounting holes 621, and four mounting holes 633 of the pressing plate 63 may correspond one-to-one to the mounting holes 621 of the two connection plates 62. The second connection assembly 6 may also include a fastener B6 (shown in fig. 1). Fasteners B6, such as bolts, may be passed through the mounting holes 633, 621 to connect the pressure plate 63 with the connection plate 62, which may compress the main beam 20 such that the main beam 20 is received in the U-shaped notch V6, thereby connecting the guide 1 with the main beam 20.

In fig. 3B, the web 62 may have an extension in the axial direction X0 that is greater than the thickness of the bearing arc as the guide 1 in the axial direction X0, so that a reliable connection with the main girder 20 is ensured, while at the same time the weight is reduced as much as possible. The rib 61 may be hollowed out at the middle portion in the axial direction X0, in other words, the rib 61 may be constituted by two plate portions 613 separated in the axial direction X0, as shown in fig. 3B.

Fig. 5B and 5C show another embodiment of the fitting 2, wherein fig. 5C is a cross-sectional view taken from the symmetry line of fig. 5B. The fitting 2 may be a circular arc slider 9 extending along a circular arc line LS, which is in a surface contact with the circular arc rail 3 along the arc length direction C3 for a sliding fit. For example, the cross section (the cross section shown in fig. 5C) of the circular arc slider 9 and the upper side surface 91 and the lower side surface 92 may coincide with a circular arc guide groove as the circular arc guide rail 3. The circular arc shaped slide 9 can also be mounted on the axle 52 of the first connecting component 5 through the through hole 93, and then the assembly of the axle bracket and the circular arc shaped slide 9 is slid into the circular arc guide groove. When the photovoltaic single-axis tracking bracket 100 rotates, the circular arc sliding block 9 slides in the circular arc guide groove, so that the rotating component of the photovoltaic single-axis tracking bracket 100 is forced to rotate along the central axis O3 of the circular arc guide rail 3. In this way, sufficient lubrication is required so that the circular arc slider 9 can slide smoothly in the circular arc guide groove.

The cross-sectional form of the main beam 20 may be square, circular, polygonal, D-shaped, etc. The rotary support assembly 10 described above may be adapted to various cross-sectional forms of the main beam 20.

In actual installation, the guide 1 may be secured under the main beam 20 by the clamp plate 63 and fastener B6 of the second coupling assembly 6, as shown in fig. 1 and 2. The roller 4 of the mating member 2 is then mounted on the cylindrical axle 52 of the first coupling assembly 5, the assembly of the axle 52 and the roller 4 is rolled into the circular arc recess 31 of the guide member 1, and then the coupling member 53, the riser 51, etc. of the first coupling assembly 5 are mounted on top of the upright 30. After the completion of the installation, one bolt is installed as a stopper 7 at each of both ends (both ends e 3) of the bearing arc as the guide 1. Waist holes 532a may be provided at the connection points of the connection members 53 and the columns 30. The main beam 20 is supported by the guide 1 on two roller pairs 44, the two roller pairs 44 being rollingly supported by the axle 52. When the photovoltaic single-axis tracking bracket 100 rotates, the roller 4 rolls in the arc groove 31, so that the rotating assembly is forced to rotate along the central axis O3 of the arc guide rail 3, and the rotation center is further overlapped with the gravity center.

The rotation support assembly 10 realizes the coincidence of the rotation center and the gravity center by adopting the circular arc guide rail 3. The tracking angle range of the photovoltaic single-axis tracking stand 100 is generally not more than ±60°, and the guide 1 (specifically, the circular arc guide 3) in the form of a bearing arc may take the form of a circular arc of less than 360 °. By determining the appropriate radius of the arc, the height position of the center of rotation can be adjusted or determined such that the center of rotation of the rotating assembly of the photovoltaic single axis tracking bracket 100 coincides with the center of gravity, thereby achieving balanced support.

In the above-mentioned rotary support assembly 10, the guide member 1 and the circular arc guide rail 3 thereof are arranged in a circular arc form of not more than 360 °, so that tracking rotation of ±60° can be realized without interfering with the installation of the photovoltaic module 40 on the main beam 20. Further, in the figure, the circular arc guide rail 3 may take the form of a semicircular arc, that is, the arc center angle α is about 180 °, for example, fluctuating up and down by 10 °. For example, the arc center angle α may be defined as the maximum central angle of the circular arc guide rail 3 between any two points at both ends e 3. With this arrangement, the photovoltaic module 40 can be less likely to interfere while satisfying the tracking angle range.

That is, the above structure can effectively avoid the interference of the arrangement of the photovoltaic modules 40 on the main beam 20, so that the arrangement of the photovoltaic modules 40 on the main beam 20 is more compact and reasonable.

In the above-mentioned rotary support assembly 10, the distance between the two roller pairs 44 distributed along the arc length direction C3 is larger, so that the support of the rotary assembly is smoother.

Second embodiment

Fig. 6 to 8 show a second embodiment according to the present invention. The main difference between the rotary support assembly 10a of the second embodiment and the rotary support assembly 10 of the first embodiment is that in the rotary support assembly 10a, the main beams 20 are connected to the mating members 2, and the columns 30 are connected to the guide members 1. It should be noted that the following embodiments herein follow the same reference numerals as those of the previous embodiments, the same or similar elements are denoted by the same reference numerals, and the description of the same technical contents is optionally omitted. The description of the omitted parts may refer to the previous embodiments, and the subsequent embodiments will not be repeated.

In the second embodiment, the second connection assembly 6 may include a pressing plate 63. The second connection assembly 6 may further include a limiting plate 64, and the limiting plate 64 may include a U-shaped plate portion 641 surrounding a U-shaped notch V6 adapted to the cross section of the main beam 20 and two lug plate portions 642 protruding outward from both sides (east and west sides in fig. 7) of the U-shaped plate portion 641. The second connection assembly 6 may be connected to the main beam 20 by fasteners B6 passing through mounting holes 633 of the pressing plate 63 and mounting holes in the lug plate portions 642 of the limiting plate 64, wherein the main beam 20 is disposed through the U-shaped notch V6.

The second connecting assembly 6 may also comprise two uprights 65 distributed along the axial direction X0, which uprights 65 may be provided with respective wheel axles 66 protruding towards each other. The two rollers 4 of the mating member 2 constituting the roller pair 44 may be rollably supported by the wheel shafts 66 of the two upright plates 65, respectively, as shown in fig. 6. Two risers 65 may be connected to the lower side of the stopper plate 64 (specifically, the bottom plate of the U-shaped plate portion 641) of the second connection assembly 6. The rollers 4 may be rollably supported below the main beam 20 by the second connection assembly 6.

In the second embodiment, the first connection assembly 5 may include a connection piece 53. The guide 1 may be connected to the upper side of the connection 53. In fig. 6 and 7, the first coupling assembly 5 may further include a bracket 54, and the guide 1 is supported above the coupling 53 by the bracket 51. In this way, the guide 1 can be fixed above the upright 30.

Fig. 8 shows a state in which the photovoltaic single-axis tracking stand 100a to which the rotary support assembly 10a is applied tracks rotation to a certain angle. As can be seen from fig. 8, the rotating assembly of the single axis tracking bracket 100a may interfere with the guiding member 1 during the tracking rotation, and thus the arrangement of the photovoltaic module 40 on the main beam 20 may require avoiding the guiding member 1, and thus may not be continuously arranged. In the case where the tracking angle requirement is satisfied, the guide 1 (the size of the circular arc guide 3) can be appropriately shortened.

Such a rotary support assembly 10a has good wind resistance to the windward load F shown in fig. 8, since the support points formed at the two rollers 4 of the roller group 4a are always dispersed on both sides of the central symmetry axis of the entire rotary assembly.

Third embodiment

Fig. 9 and 10 show a third embodiment according to the present invention. The rotary support assembly 10b in the third embodiment is mainly different from the rotary support assembly 10 in the first embodiment in that in the rotary support assembly 10b, the circular arc guide groove as the circular arc guide rail 3b in the guide member 1b is a circular arc notch 32 opened inward from the outer peripheral surface 13b of the guide member 1 b. The circular arc notch 32 includes a larger circular arc groove section 321 located on the radially inner side and a smaller circular arc groove section 322 located on the radially outer side, wherein the groove width dimension of the smaller circular arc groove section 322 in the axial direction X0 is smaller than the groove width dimension of the larger circular arc groove section 321 in the axial direction X0.

In the third embodiment, the first connection assembly 5b may include the connection piece 53. The first connection assembly 5 may further include a stand 57. The stand 57 stands on the connection piece 53 (specifically, the transverse plate portion 531), the stand 57 passes through the smaller circular arc groove section 322 into the larger circular arc groove section 321, and the portion of the stand 57 located inside the larger circular arc groove section 321 has the protruding shaft sections 571 on both sides in the axial direction. In the figure, the male shaft sections 571 on both sides are provided by a circular shaft traversing the stand 57 along the axial direction X0. The two rollers 4 of the mating member 2 constituting the roller pair 44 may be rollably supported by the two male shaft sections 571, respectively, as shown in fig. 10. The two rollers 4 are accommodated in the circular arc notch 32 as an example of the circular arc guide 3b, and are respectively in rolling engagement with two portions of the circular arc notch 32 in the axial direction X0.

The above-described rotary support assembly may also be referred to as a balanced support bearing arrangement. The rotating support assembly realizes balanced support based on the characteristic that the angle adjusting range of the photovoltaic single-axis tracking support is smaller than +/-90 degrees (generally not larger than +/-60 degrees), can fundamentally solve the negative influence of eccentric bending moment on the rotation driving of the photovoltaic single-axis tracking support, and enables the driving of the photovoltaic single-axis tracking support to be light and flexible.

With the development of the photovoltaic power generation technology, the adoption of the photovoltaic single-shaft tracking bracket to increase the power generation capacity of the photovoltaic power station has become an important way for improving the overall economic benefit of the photovoltaic power station, so that the invention has a very wide application prospect in the future construction of the photovoltaic power station.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a rotatory supporting component and photovoltaic unipolar tracking support for rotationally support the girder of photovoltaic unipolar tracking support on the stand, support has photovoltaic component, its characterized in that on the girder: the rotary support assembly includes:

The guide piece comprises an arc guide rail, the arc guide rail is provided with a central axis and an arc length direction, the guide piece is axially provided with two surfaces, the two surfaces of the guide piece are respectively provided with an arc groove, the arc guide groove is formed by the two arc grooves corresponding to the two surfaces, and the two rollers of each roller pair are respectively in rolling fit with the two arc grooves; and

The matching piece is movably matched with the circular arc guide rail and is movably arranged along the arc length direction relative to the circular arc guide rail, two ends of the circular arc guide rail along the arc length direction are provided with stop pieces, and the stop pieces are bolts arranged at two end parts of the circular arc guide rail and are used for preventing the matching piece from falling out of the circular arc guide rail;

a first one of the main beam and the upright is connected to the guide member, and a second one is connected to the mating member, whereby the main beam is rotatably supported on the upright about the central axis, and the circular arc guide rail is arranged around the main beam such that the central axis is located between a lower surface of the main beam and an upper surface of the photovoltaic module;

still include second coupling assembling, second coupling assembling includes the clamp plate, the clamp plate becomes the U-shaped shape, including dull and stereotyped portion and the board portion of bending that upwards extends from dull and stereotyped portion both sides, the clamp plate is provided with the mounting hole, sets up in dull and stereotyped portion, and the mounting hole of clamp plate and the mounting hole one-to-one of connecting plate, and the fastener passes the mounting hole and links together clamp plate and connecting plate.

2. The rotary support assembly and photovoltaic single axis tracking bracket of claim 1, wherein: the circular arc guide rails are arranged such that the center of gravity of a rotating assembly is located on the central axis, the rotating assembly being made up of the main beam and other assemblies that rotate with the main beam.

3. The rotary support assembly and photovoltaic single axis tracking bracket of claim 1, wherein:

The girder is connected with the guide piece, so that two ends of the arc guide rail along the arc length direction are respectively positioned at two sides of the girder.

4. The rotary support assembly of claim 1, wherein:

the matching piece is contacted with the arc guide rail at least two places along the arc length direction.

5. The rotary support assembly according to claim 4, wherein:

the circular arc guide rail is a circular arc guide groove;

the matching piece comprises a first roller group, the first roller group is composed of at least two rollers distributed along the arc length direction, and the matching piece is in rolling fit with the arc guide groove at least two positions through the first roller group.

6. The rotary support assembly according to claim 5, wherein:

the fitting also includes a second roller set axially spaced from the first roller set, wherein an axial direction is a direction in which the central axis extends;

Each roller in the second roller group and the corresponding roller in the first roller group form a roller pair, and two rollers of each roller pair are coaxially arranged and are respectively in rolling fit with the circular arc guide groove.

7. The rotary support assembly of claim 1, wherein:

The rotary support assembly further comprises a first connecting assembly, the first connecting assembly comprises two vertical plates distributed along the axial direction, the two vertical plates are respectively provided with wheel shafts protruding towards each other, two rollers of each roller pair are respectively supported by the wheel shafts of the two vertical plates in a rolling manner, and the two vertical plates are connected to the second side.

8. The utility model provides a support is trailed to single axle of photovoltaic, includes girder and a plurality of stands of distributing along north-south direction, its characterized in that: further comprising at least two of the rotary support assemblies of any one of claims 1-7, at least two of the plurality of uprights each rotatably supporting the main beam via a corresponding rotary support assembly.