CN116201816B

CN116201816B - Bearings, photovoltaic brackets and photovoltaic power generation systems

Info

Publication number: CN116201816B
Application number: CN202211131165.3A
Authority: CN
Inventors: 庞悦文; 强生官; 全鹏
Original assignee: Trina Solar Co Ltd
Current assignee: Trina Solar Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2024-09-17
Anticipated expiration: 2042-09-16
Also published as: CN116201816A

Abstract

The bearing, photovoltaic bracket and photovoltaic power generation system in the embodiments of the present invention include: a bearing shell is provided with an electromagnet; an axially arranged connecting portion and at least one limiting portion are formed on the inner surface of the bearing outer ring; the bearing inner ring is relatively rotatably arranged in the bearing outer ring; a sliding member is slidably arranged between the bearing outer ring and the bearing inner ring along the axial direction, and the relative rotation between the sliding member and the bearing inner ring is limited; the sliding member is magnetic so as to be driven to slide by the magnetic force of the electromagnet; at least one limiting structure is formed on the outer surface of the sliding member toward the bearing outer ring, which includes a radially elastically retractable locking block; the locking block slides with the sliding member to align and combine with the limiting portion or the connecting portion, thereby limiting the relative rotation of the inner and outer rings of the bearing or releasing the restriction, thereby achieving bracket protection from the bearing perspective rather than from the photovoltaic bracket perspective, and can effectively solve the contradiction between the structural protection and cost of the photovoltaic tracking bracket.

Description

Bearing, photovoltaic support and photovoltaic power generation system

Technical Field

The disclosure relates to the technical field of photovoltaics, in particular to a bearing, a photovoltaic bracket and a photovoltaic power generation system.

Background

Solar energy is a clean, safe and reliable renewable energy source. The development of the solar power generation technology can effectively reduce energy efficiency, reduce pollution, adjust energy structure and realize sustainable development. Photovoltaic power generation is a power generation technology for converting solar energy into electric energy by using a solar cell module (also called a photovoltaic module), and a photovoltaic tracking bracket is a power device capable of adjusting the inclination angle of the photovoltaic module in real time so as to keep the photovoltaic module right against the sun. The application of the photovoltaic tracking bracket can effectively improve the solar radiation amount received by the photovoltaic module, so that the overall power generation amount of the photovoltaic power generation system is improved.

The photovoltaic tracking bracket is a large-span torsion structure which rotates by means of central torque. Along with the area increase of the photovoltaic module and the increase of the whole length of the photovoltaic tracking bracket, the photovoltaic tracking bracket is more easily affected by wind environment, for example, wind-induced vibration phenomena such as flutter, vortex vibration and the like occur under the action of wind load, thereby causing the damage of the bracket structure. Moreover, wind pressure and wind torsion are also important influencing factors in the design of the photovoltaic tracking bracket structure and the cost control.

At present, in order to reduce the influence of wind load on a support structure, the inclination angle of a photovoltaic module is generally adjusted to zero degree when the wind weather is met, namely, the position parallel to the ground, and the wind load is reduced by reducing the windward area of a photovoltaic tracking support. However, when the photovoltaic tracking support is at a zero-degree inclination angle, the photovoltaic tracking support is easy to generate flutter, and the structure is possibly damaged, so that the critical unstable wind speed of the photovoltaic tracking support is required to be improved through multi-point driving, namely a mode of arranging a plurality of speed reducers. However, the use of a multi-point drive system can result in a substantial increase in the electrically controlled cost of the photovoltaic tracking rack.

Accordingly, in order to avoid the occurrence of chatter, the inclination angle of the photovoltaic module may be adjusted to a large angle in windy weather. The wind-induced vibration phenomenon of the photovoltaic tracking bracket is dominated by vortex-induced vibration, the structure is not damaged, and vibration generated by the vortex-induced vibration can be effectively restrained by installing a damper and the like. But the wind load born by the light tracking bracket is larger, and the structural cost and the cost for adding the damper are higher.

To ameliorate this problem, the industry has generally been able to employ protective measures such as reinforcing or thickening the photovoltaic tracking brackets to strengthen the strength, providing reciprocating dampers, and adjusting the photovoltaic tracking brackets to a high wind protection mode. However, it will be appreciated that these protective measures correspond to an increase in material and assembly costs. For example, structural reinforcement or thickening of the photovoltaic tracking stent can increase material costs; the use of conventional reciprocating dampers requires additional damper connectors, etc., which can increase the overall cost of the photovoltaic system.

Therefore, the contradiction between protection and cost is difficult to solve on the current photovoltaic tracking bracket.

Inventive message

In view of the above drawbacks of the related art, an object of the present disclosure is to provide a bearing, a photovoltaic bracket, and a photovoltaic power generation system.

The first aspect of the present disclosure provides a sliding member slidably disposed along the axial direction between the bearing outer race and the bearing inner race and disposed with limited relative rotation between the bearing inner race, the sliding member having magnetism, being drivable by a magnetic force of the electromagnet to slide, the sliding member forming at least one restraining structure toward an outer surface of the bearing outer race, the restraining structure comprising: the locking piece is elastically and telescopically arranged in the groove on the outer surface of the sliding piece along a radial direction pointing to the bearing outer ring, can extend out of the outer surface of the sliding piece in a non-compressed state, and can axially slide along with the sliding piece; the sliding stroke of the sliding piece comprises a first position and a second position, when the sliding piece is in the first position, the locking piece is aligned and combined with the limiting part, the bearing outer ring and the bearing inner ring form relative rotation limitation, when the sliding piece is in the second position, the locking piece is aligned and combined with the communicating part, and the relative rotation limitation is relieved by the bearing outer ring and the bearing inner ring.

In some embodiments of the first aspect, the relative rotation between the slider and the bearing inner race is limited including: at least one sliding rotation-stopping structure comprising: the sliding groove and the sliding block are matched in a relatively sliding way along the axial direction; one of the sliding groove and the sliding block is fixedly arranged at the position of the bearing inner ring in the circumferential direction, and the other sliding groove and the sliding block are fixedly arranged at the position of the sliding piece in the circumferential direction.

In some embodiments of the first aspect, the communication portion includes: an annular groove provided along a circumference of the slider; the stopper includes: and a paragraph groove matched with the locking piece.

In some embodiments of the first aspect, the sliding member is annular, and the plurality of limiting structures are arranged along the circumferential direction of the sliding member; the limiting parts are in one-to-one correspondence with the limiting structures in number and are arranged along the circumferential direction of the inner surface of the bearing outer ring.

In some embodiments of the first aspect, the limit structure comprises: at least one groove extending in the radial direction; an elastic telescopic piece is arranged in the groove; one end of the elastic telescopic piece, which points to the outside of the groove, is provided with a locking piece.

In some embodiments of the first aspect, the limit structure comprises: the first locking piece and the second locking piece are arranged on the sliding piece in an axial direction and can elastically stretch along the radial direction; the first locking piece and the second locking piece are respectively combined with the limiting part and the communicating part.

In some embodiments of the first aspect, a length of a spacer between the limit portion and the communication portion is greater than a spacing between the first lock piece and the second lock piece.

In some embodiments of the first aspect, the lock block outer end surface is a convex surface including a first guide portion and a second guide portion respectively facing opposite sides of the axial direction; the first and second guide portions include: curved or beveled surfaces.

In some embodiments of the first aspect, an electronic control module is disposed in the bearing housing; the electric control module comprises: a power supply unit for supplying power to the electromagnet; and a first control unit for controlling a direction of a current flowing through the electromagnet to set a magnetic field direction of the electromagnet in response to a control instruction, to form or release the relative rotation restriction.

A second aspect of the present disclosure provides a photovoltaic bracket comprising: a bearing as claimed in any one of the first aspects; and the rotating beam passes through the penetrating part of the bearing inner ring in a matched manner and is used for loading the photovoltaic module.

In some embodiments of the second aspect, the photovoltaic rack is a photovoltaic tracking rack comprising: a driving unit for driving the rotation of the rotation beam; the second control unit is connected with and controls the driving unit to adjust the setting angle of the photovoltaic module; the second control unit is also used for outputting control instructions to the bearing so as to control the direction of current flowing through the electromagnet to set the magnetic field direction of the electromagnet.

A third aspect of the present disclosure provides a photovoltaic power generation system, comprising: at least one photovoltaic power generation device; the photovoltaic power generation device includes: the photovoltaic bracket of the first or second aspect; and the photovoltaic module is loaded on the rotating beam of the photovoltaic bracket.

As described above, the bearing, the photovoltaic bracket, and the photovoltaic power generation system in the embodiments of the present disclosure, the bearing includes: the bearing shell is provided with an electromagnet; the inner surface of the bearing outer ring forms a communication part and at least one limit part which are axially arranged; the bearing inner ring is arranged in the bearing outer ring in a relatively rotatable manner; the sliding piece is arranged between the bearing outer ring and the bearing inner ring in a sliding way along the axial direction, and relative rotation between the sliding piece and the bearing inner ring is limited; the sliding piece has magnetism so as to be driven to slide by the magnetic force of the electromagnet; the sliding piece forms at least one limiting structure towards the outer surface of the bearing outer ring and comprises a radially elastically telescopic locking block; the locking piece slides along the sliding piece to be aligned and combined with the limiting part or the communicating part, so that the structure of relative rotation of the inner ring and the outer ring of the bearing or the limitation removal is limited, the support protection is realized from the bearing angle instead of the photovoltaic support angle, the extra cost brought by multi-point driving, reinforcing or thickening the photovoltaic support, the reciprocating damper and the like in the related technology is saved, and the contradiction between the structure protection and the cost of the photovoltaic tracking support can be effectively solved.

Drawings

Fig. 1 shows a schematic perspective view of a bearing in an embodiment of the present disclosure.

Fig. 2 shows a schematic perspective view of a bearing housing and its mounting electromagnet in an embodiment of the present disclosure.

Fig. 3a shows a schematic perspective view of a bearing outer ring in an embodiment of the present disclosure.

Fig. 3b shows a schematic view in plan perspective of the bearing outer race side direction in fig. 3 a.

FIG. 4a shows a schematic diagram showing a front perspective structure of a bearing inner race in an embodiment of the present disclosure

Fig. 4b shows a schematic rear perspective view of the bearing inner ring of fig. 4 a.

Fig. 5 shows a schematic perspective view of a slider in an embodiment of the present disclosure.

Fig. 6 shows a schematic perspective view of a lock block and a resilient telescopic member in an embodiment of the present disclosure.

Fig. 7 shows a schematic structural diagram of the combination among an electromagnet, a slider, and a bearing inner ring in an embodiment of the present disclosure.

Fig. 8a shows a partial cross-sectional schematic view of a bearing forming a relative rotation limitation when a slider in an embodiment of the present disclosure is in a first position.

Fig. 8b shows a partial cross-sectional schematic view of a bearing releasing rotation restriction when the slider is in the second position in an embodiment of the present disclosure.

Fig. 9 shows a schematic perspective view of a photovoltaic bracket in an embodiment of the present disclosure.

Detailed Description

Other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the following description of the embodiments of the disclosure by means of specific examples. The disclosure may be practiced or carried out in other embodiments or applications, and details of the disclosure may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The embodiments of the present disclosure will be described in detail below with reference to the attached drawings so that those skilled in the art to which the present disclosure pertains can easily implement the same. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

In the description of the present disclosure, references to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, presented in this disclosure may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the representations of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

For the purpose of clarity of the present disclosure, components that are not related to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.

Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" with other elements interposed therebetween. In addition, when a certain component is said to be "included" in a certain device, unless otherwise stated, other components are not excluded, but it means that other components may be included.

Although the terms first, second, etc. may be used herein to connote various elements in some instances, the elements should not be limited by the terms. These terms are only used to distinguish one element from another element. For example, a first interface, a second interface, etc. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, modules, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, modules, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the language clearly indicates the contrary. The meaning of "comprising" in the specification is intended to specify the presence of stated features, regions, integers, steps, implementations, elements, and/or components, but does not preclude the presence or addition of other features, regions, integers, steps, implementations, elements, and/or components.

Terms representing relative spaces such as "lower", "upper", and the like may be used to more easily describe the relationship of one device to another device as illustrated in the figures. Such terms refer not only to the meanings indicated in the drawings, but also to other meanings or implementations of the device in use. For example, if the device in the figures is turned over, elements described as "under" other elements would then be described as "over" the other elements. Thus, the exemplary term "lower" includes both upper and lower. The device may be rotated 90 deg. or at other angles and the terminology representing relative space is to be construed accordingly.

Although not differently defined, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The term append defined in commonly used dictionaries is interpreted as having a meaning that is consistent with the meaning of the relevant technical literature and the currently prompted message, and is not excessively interpreted as an ideal or very formulaic meaning, so long as no definition is made.

To protect the photovoltaic tracking bracket, the inclination angle of the carried photovoltaic module needs to be adjusted when the weather of strong wind is met. However, at zero degree tilt, although the windward area of the photovoltaic tracking stand can be reduced to reduce wind load, flutter exists, which may cause the stand structure to be damaged. For this reason, if the zero-degree tilt angle mode is adopted, the chatter problem at the zero-degree tilt angle is prevented by the multi-point driving, i.e., the plurality of reduction machines. In addition, by adjusting the inclination angle to the maximum, chatter can be avoided, but at this time, the wind load is large, and it is necessary to install a damper, increase the bracket thickness or strength, and the like. Thus, either way, an increase in material or assembly is required, which results in an increase in the cost per rack, and hence the overall cost of the photovoltaic system.

In view of this, provide bearing, photovoltaic support and photovoltaic power generation system in this disclosed embodiment, through making the bearing have the restriction rotate and remove restriction's mechanism to can control photovoltaic support and photovoltaic module's rotation, thus no longer need through carrying out the reinforcement of material or subassembly at photovoltaic support, both reach the effect of protection support, can effectively reduce cost again. It should be noted that the bearing can be applied not only to a photovoltaic tracking bracket, but also to other types of photovoltaic brackets, and even to other fields where it is necessary to control the limitation or release of the rotation action of the bearing.

As shown in fig. 1, a schematic perspective view of a bearing according to an embodiment of the present disclosure is shown.

The front face of the bearing is schematically shown in fig. 1, which comprises a bearing housing 101, a bearing outer ring 102 and a bearing inner ring 103. As shown in fig. 1 and 2, the bearing housing 101 has an internal space, and forms a through portion 1011 provided along one axial direction Z, and an electromagnet 105 may be provided in the through portion 1011. In the example of fig. 2, the through-hole 1011 is exemplarily presented as a cylindrical accommodation space. The electromagnet 105 may be fixed in the bearing housing by, for example, bonding, and may be disposed around the circumference of the circular opening of the through portion 1011 on the side wall. The through-hole 1011 is provided with the bearing inner ring 103 and the bearing outer ring 102 in a partial space from the electromagnet 105 to the front surface of the bearing. In a possible example, the electromagnet 105 may include a housing and a coil disposed therein, and the direction of the magnetic field of the electromagnet 105, that is, the direction of N, S poles may be set by changing the direction of the current flowing therethrough. The number of coils may be adjusted according to the size of the required attractive or repulsive force.

As can be seen in fig. 1, the bearing outer ring 102 is provided in the through portion, and the bearing inner ring 103 is provided in the bearing outer ring 102. The bearing inner ring 103 and the bearing outer ring 102 can rotate relatively, and the rotation can be smooth relative rotation so as to realize the function of the bearing. The bearing inner ring 103 is internally formed with a penetrating portion 1033 extending along the axial direction and communicating with the penetrating portion, and the penetrating portion 1033 may be used for penetrating a rotatable component, such as a rotating beam for loading a photovoltaic module, for example, a photovoltaic bracket. For this purpose, the penetrating portion 1033 may be a square hole, a round hole, a rectangular round hole, or the like, depending on the cross-sectional shape of the penetrating rotating beam.

Optionally, the bearing further includes an electronic control module 104, and the electronic control module 104 may be disposed in the bearing housing 101. As illustrated in fig. 1, the bearing housing 101 may be presented as forming an expansion space sideways of at least one side in the axial direction, the expansion space being used for arranging the electronic control module 104.

Further describing embodiments of the present disclosure, structures may be formed between the bearing inner race 103 and the bearing outer race 102 to enable cooperation with the electromagnets 105 to control rotational restriction between the bearing inner race 103 and the bearing outer race 102.

As shown in fig. 3a, a schematic perspective view of the bearing outer ring 102 according to an embodiment of the present disclosure is shown. As shown in fig. 3b, a schematic view of the bearing outer race 102 of fig. 3a in a side perspective plan view is shown.

As shown in fig. 3a, the bearing outer ring 102 is circumferentially provided with a stopper 1021 and a communication 1022 toward the inner surface of the bearing inner ring 103, the stopper 1021 and the communication 1022 being arranged therebetween in the axial direction. The communication portion 1022 is used for keeping the bearing outer ring 102 and the bearing inner ring 103 relatively rotatable, and the restraining portion 1021 is used for forming a relative rotation restraint between the bearing outer ring 102 and the bearing inner ring 103. Illustratively, the communication portion 1022 may be a continuous annular groove, and the restraining portion 1021 may be at least one segment groove. An example of a plurality of stopper portions 1021 is shown, with the bearing outer race 102 being provided with circumferentially discontinuous groove portions, with each segmented segment groove serving as one stopper portion 1021. Note that, the number of the stopper 1021 is not limited to the plural number shown in the drawings.

As shown in fig. 4a, a schematic front perspective view of the bearing inner ring 103 in an embodiment of the present disclosure is shown. Fig. 4b shows a schematic rear perspective view of the bearing inner ring 103 in fig. 4 a.

The bearing inner race 103 illustratively includes a front portion 1031 and a rear portion 1032, with the penetration portion 1033 extending through the bearing inner race 103. The rear portion 1032 is adapted to fit over the slider 106, the slider 106 having a circular opening formed therein for fitting over the rear portion 1032, as shown in fig. 5. Thus, the rear portion 1032 may have a shorter diameter than the front portion 1031. The circumferential surface of the front portion 1031 may correspond to the inner surface of the bearing outer race 102.

The bearing inner ring 103 and the sliding member 106 can keep rotation restriction, that is, the sliding member 106 rotates together with the rotation of the bearing inner ring 103. In addition, the sliding member 106 may be magnetic, such as being made of a permanent magnet in whole or part (such as the sliding member 106 is fixed with a permanent magnet), or the locking piece 1062 may be made of a permanent magnet, and the sliding member 106 may be driven to slide by the magnetic force of the electromagnet along the Z-axis, so that the sliding member 106 and the bearing inner ring 103 may also perform a relative axial Z-movement. To this end, at least one sliding rotation stopping structure may be formed between the sliding member 106 and the bearing inner race 103 in the embodiments of the present disclosure, the sliding rotation stopping structure including: a chute 1034 and a slider 1061 axially slidably engaged relative to each other; one of the runner 1034 and the slider 1061 is fixed at a position in the circumferential direction of the bearing inner ring 103, and the other is fixed at a position in the circumferential direction of the slider 106. To achieve uniform magnetic force applied by the electromagnet 105 to the slider 106, the electromagnet 105 and the slider 106 may be annular shapes having the same inner and outer diameters.

Specifically, as shown in fig. 4b and fig. 5, the bearing inner ring 103 is provided with a plurality of sliding grooves 1034 extending along the axial direction at intervals in the circumferential direction, and the sliding grooves 1034 may be formed at the rear portion 1032 of the bearing inner ring 103 and have an open end, and the open end may be located at the back surface of the bearing inner ring 103. The sliding member 106 has a convex shape on the inner surface of the circular opening thereof, and each sliding block 1061 is in one-to-one correspondence with each sliding groove 1034. The rear portion 1032 of the bearing inner race 103 is insertable into the circular opening of the slider 106 and provides a one-to-one engagement between each runner 1034 and the slider 1061. Illustratively, to prevent disengagement between the runner 1034 and the slide 1061 in a radial direction perpendicular to the axial direction, the slide 1061 and the runner 1034 may take on a structure such as the illustrated example, where the slide 1061 includes a radially disposed boss 10611 and a structure where an end portion of the boss 10611 forms an extension 10612 to at least one side (two sides in the circumferential direction of the slider 106 are illustrated in fig. 5), which may be approximately T-shaped as shown, or inverted L-shaped as shown. Also, the mutually cooperating runner 1034 and slider 1061 may be disposed at positions in the circumferential direction of the bearing inner race 103 and the slider 106, respectively, such that the slider 106 may rotate with the bearing inner race 103 with respect to the bearing outer race 102.

As further shown in fig. 5, a schematic perspective view of the slider 106 in an embodiment of the present disclosure is shown.

The sliding member 106 is provided between the bearing outer race 102 and the bearing inner race 103, and is slidable in the axial direction. The slider 106 is magnetic so as to be urged to slide by the magnetic force of the electromagnet 105, such as to slide close to the electromagnet 105 by attraction or slide away from the electromagnet 105 by repulsion. Specifically, the sliding member 106 forms at least one limiting structure (e.g., a shown in a drawing) toward the outer surface of the bearing outer ring 102, and is configured to cooperate with a limiting portion 1021 and a communicating portion 1022 provided on the inner surface of the bearing outer ring 102 to form a rotation limitation or release a limitation. In the example of fig. 5, a plurality of restraining structures are illustratively shown disposed circumferentially along the slider 106.

Specifically, each of the limiting structures includes at least one locking piece 1062 elastically and telescopically disposed on the sliding member 106 along a radial direction directed toward the bearing inner ring 103. The manner in which the locking block 1062 is implemented in multiple numbers, such as a first locking block 1062a and a second locking block 1062b disposed axially, is illustratively shown in fig. 5. The first locking piece 1062a and the second locking piece 1062b may slide axially with the bearing inner race 103. Illustratively, as shown in FIG. 6, at least one resilient telescoping member 1063, such as a spring or the like, may be disposed between the first locking block 1062a and the slider 106. The elastic telescopic member 1063 may have one end fixedly connected to the sliding member 106 and the other end fixedly connected to the locking piece 1062, so that the elastic telescopic member 1063 and the locking piece 1062 are not separated from the sliding member 106. Accordingly, in the example of fig. 5, each of the restraining structures is shown as two rows of grooves disposed circumferentially along the slider 106 and two rows of locking blocks 1062 disposed in the grooves. In other embodiments, the two ends of the elastic telescopic member 1063 are not fixedly connected with the locking piece 1062 and the bearing outer ring 102, but a stop structure for stopping the elastic telescopic member 1063 and the locking piece 1062 from being separated from the sliding member 106 is substituted.

In a specific implementation example, reference may be made to fig. 6 and 7 together, and the limiting structure may include a groove extending in the radial direction. The groove is provided with an elastic telescopic member 1063 to limit the elastic telescopic member 1063 to extend and retract in the radial direction. One end of the elastic telescopic member 1063 pointing out of the groove is provided with a locking piece 1062, such as a first locking piece 1062a and a second locking piece 1062b. In a natural state, that is, in a state that the elastic telescopic member 1063 is not elastically deformed, the first locking piece 1062a and the second locking piece 1062b may protrude out of the surface of the sliding member 106, and in fig. 5, in order to illustrate that the first locking piece 1062a and the second locking piece 1062b may be telescopic through the elastic telescopic member, the state that the first locking piece 1062a is retracted into the groove and the second locking piece 1062b is extended out of the groove is shown. So as to be coupled to the stopper 1021 and the communicating portion 1022 located on the inner surface of the bearing outer race 102. Wherein, when the first locking piece 1062a is combined with a limiting portion 1021, a rotation limitation is formed; the rotation restriction can be released when the second locking piece 1062b is engaged with the communication portion 1022. It will be appreciated that, correspondingly, the limiting structure on the sliding member 106 is also provided with two grooves arranged along the axial direction, so as to be respectively provided with the elastic telescopic member 1063 and the first locking piece 1062a and the second locking piece 1062b. It should be noted that, although the first locking piece 1062a and the second locking piece 1062b are shown in the embodiment of fig. 5, in other embodiments, each limiting structure may include only one locking piece 1062 to combine the limiting portion 1021 and the communicating portion 1022, respectively.

Referring also to fig. 7, a configuration is shown in which the electromagnet 105, the slider 106 with the first lock piece 1062a and the second lock piece 1062b, and the bearing inner ring 103 are combined. The sliding stroke of the sliding member 106 in the axial direction includes a first position and a second position, and as can be seen from fig. 7, the electromagnet 105 attracts the sliding member 106 to move to the second position by setting the magnetic field direction, and the sliding member 106 is blocked by the electromagnet 105. Fig. 7 corresponds to the state of fig. 8b, where the bearing outer ring 102 and the bearing inner ring 103 are released from the relative rotation limitation, and accordingly, the elastic telescopic member connected to the second locking piece 1062b is in a non-compressed state, so that the second locking piece 1062b extends out of the groove to be aligned with the communicating portion 1022, and the elastic telescopic member 1063 connected to the first locking piece 1062a is in a compressed state, so that the first locking piece 1062a is located in the groove. It should be noted that, to clearly show the elastic telescopic member 1063 to which the first locking piece 1062a is connected, a portion of the first locking piece 1062a is hidden in fig. 7 and the interior thereof is visible.

Alternatively, the electromagnet 105 may apply a repulsive force to the slider 106 to urge the slider 106 away from the electromagnet 105 until it is blocked by the flange of the front portion 1031 of the bearing inner race 103 to the first position. Therefore, both ends of the sliding stroke of the slider 106 are also formed by the bearing outer race 102 and the electromagnet in the present embodiment, so that the first position and the second position can be determined by setting the distance between the electromagnet 105 and the front portion 1031 of the bearing inner race 103.

Wherein the first position enables the first locking piece 1062a to correspond to the rotation track of the limiting part 1021, and when the first locking piece 1062a is combined with the limiting part 1021, the relative rotation limitation between the bearing outer ring 102 and the bearing inner ring 103 is formed; the second position causes the second lock piece 1062b to be positioned corresponding to the communication portion 1022 such that the second lock piece 1062b engages with the communication portion 1022 when aligned, releasing the relative rotation limitation. In some embodiments, the rotation limitation may refer to a non-rotatable locking state between the bearing inner ring 103 and the bearing outer ring 102, or in other embodiments, the rotation limitation may also refer to a limited-stroke relative rotation between the bearing inner ring 103 and the bearing outer ring 102, which may be specifically set according to practical situations. For example, if the length of the limiting portion 1021 in the circumferential direction is matched with the first locking piece 1062a without a length allowance or with a smaller allowance, the first locking piece 1062a enters the limiting portion 1021 to achieve the locked state; or the length of the limiting part 1021 in the circumferential direction relative to the first locking piece 1062a is a margin relative to the first locking piece 1062a, the first locking piece 1062a can still slide a distance relatively after entering the limiting part 1021.

In particular, reference may be made to fig. 8a and 8b, where fig. 8a illustrates a schematic cross-sectional view of a bearing portion that provides a relative rotation limitation when the slider 106 is in the first position in an embodiment of the present disclosure. Fig. 8b shows a schematic cross-sectional view of a bearing portion for releasing rotation restriction when the slider 106 is in the second position in an embodiment of the present disclosure.

As shown in fig. 8a, the electromagnet 105 may generate a repulsive force with respect to the slider 106 by applying a current in one direction. The magnetization directions of the annular electromagnet 105 and the slider 106 are the axial directions thereof. The slider 106 is urged by the repulsive force to a first position, which may be against the flange of the front portion 1031 of the bearing inner race 103. The position of the first locking piece 1062a corresponds to the rotation track of the restricting portion 1021. As can be appreciated in conjunction with fig. 3b, the one or more limiting portions 1021 circumferentially disposed about the bearing outer race 102 form a rotational path with respect to the first locking piece 1062a along with the relative rotation of the bearing outer race 102 and the bearing inner race 103 (e.g., the bearing outer race 102 is stationary and the bearing inner race 103 and the sliding member 106 are rotating). Therefore, if the restraining portion 1021 is not aligned with the first locking piece 1062a in the relative rotation, the first locking piece 1062a is pressed by the portion of the inner surface of the bearing outer ring 102 other than the restraining portion 1021, so that the elastic telescopic member 1063 is in a compressed state. Until the stopper 1021 is aligned with the first lock piece 1062a as shown in fig. 8a, it is in a released state by the elastic deformation force to extend into the stopper 1021, thereby forming a rotation-restricted state of the bearing outer race 102 and the bearing inner race 103.

As also shown in fig. 8b, the electromagnet 105 may generate a relative attractive force with the slider 106 by applying a current in the other direction. The slider 106 is attracted to the second position, which may be against the electromagnet 105. As can be appreciated in connection with fig. 3b, the circumferentially arranged communication 1022 of the bearing outer ring 102 is an annular groove, the second locking piece 1062b corresponds to said annular groove and extends into, the communication 1022 does not limit the rotation of the second locking piece 1062b with the sliding member 106 and the bearing inner ring 103, so that the bearing inner ring 103 and the bearing outer ring 102 can rotate relatively without rotation limitation.

If the first lock piece 1062a is also coupled to the stopper 1021 when the second lock piece 1062b is coupled to the communication portion 1022, the state of releasing the rotation restriction does not exist. Thus, in the embodiment of fig. 8a and 8b, the length of the spacing segment between the restraining portion 1021 and the communicating portion 1022 may be greater than the spacing between the first locking piece 1062a and the second locking piece 1062 b. As shown in fig. 8a, when the sliding member 106 slides to the first position, the first locking piece 1062a corresponds to the limiting portion 1021, and since the distance between the second locking piece 1062b and the first locking piece 1062a is smaller than the distance between the limiting portion 1021 and the communicating portion 1022, the second locking piece 1062b is in a compressed state and is pressed against the inner surface of the spacer. Similarly, as shown in fig. 8b, when the sliding member 106 slides to the second position, the second locking piece 1062b is in a released state and extends out of the outer surface of the bearing inner ring 103 to be coupled to the communicating portion 1022, and since the distance between the second locking piece 1062b and the first locking piece 1062a is smaller than the distance between the limiting portion 1021 and the communicating portion 1022, the position of the first locking piece 1062a corresponds to the interval section and is compressed to be pressed against the inner surface of the interval section as shown in fig. 8b, so that the rotation limitation is not affected.

It should be understood that, although the above embodiment shows the first locking piece 1062a and the second locking piece 1062b respectively corresponding to the functions of the limiting portion 1021 and the communicating portion 1022, it is not limited to the illustrated example, but it is possible to obtain only one locking piece 1062 for each limiting structure of the sliding member 106, and to achieve the rotation limitation and the rotation limitation respectively at two positions in the axial direction of the sliding member 106, as shown in fig. 8a and 8 b. However, using only one lock block would require a greater axial sliding travel of the slider 106, with some increase in bearing thickness.

In order to smoothly displace the at least one locking piece even if pressed while sliding in the axial direction, the outer end surface of the at least one locking piece may be a convex surface, and the convex surface includes a first guide portion 10621 and a second guide portion 10622 respectively facing opposite sides in the axial direction; the first and second guide portions 10621 and 10622 include: curved or beveled surfaces. For example, as illustrated in fig. 6, 8a and 8b, the outer end surfaces of the first locking piece 1062a and the second locking piece 1062b are directly curved surfaces.

In some embodiments, the electronic control module 104 may include a power supply unit and a first control unit. The power supply unit is for supplying power to the electromagnet 105. The power supply unit can be a battery, can take electricity from the photovoltaic tracking system or supply power through an external small photovoltaic module. The first control unit is configured to control the direction of the current flowing through the electromagnet 105 to set the magnetic field direction of the electromagnet 105 in response to a control instruction, to form or release the relative rotation restriction. In a possible implementation example, the first control unit may include a switching circuit or a selection circuit of a power supply loop that can switch two current directions, and the switching is triggered by a control instruction.

As shown in fig. 9, a schematic structural diagram of a photovoltaic bracket in an embodiment of the present disclosure is shown.

The photovoltaic bracket comprises: a bearing 201, which may be realized by the bearing 201 as described in the previous embodiments, for example; and a rotating beam 202 passing through the penetrating part of the inner ring of the bearing 201 in a matched manner for loading the photovoltaic module 206. In the particular example illustrated, the bottom of the bearing 201 may be secured to the upright 203 by a screw lock (e.g., a bolt), such as by a connector 204 provided with the upright 203. The connecting piece 204 can be fixedly connected to the upright 203 through a screw lock connection. The photovoltaic module 206 may be secured to the rotating beam 202 by a pair of purlins 205 by a screw-lock connection. Photovoltaic module 206 may be secured to purlin 205 by a screw-lock connection. The rotating beam 202 passes through the penetrating part in the middle of the bearing 201, and the rotating beam 202 can rotate around the axial direction under the drive of a driving system (including but not limited to a push rod, a speed reducer and the like), and can drive the inner ring of the bearing 201 to rotate during rotation. The cross-sectional shape of the turning beam 202 is not limited to triangle, circle, square, rectangle, rectangular rounded, hexagon, octagon, etc., and corresponds to the shape of the penetration portion.

In some embodiments, the photovoltaic support may be implemented as a photovoltaic tracking support, and may specifically further include: a driving unit and a second control unit.

The driving unit is used for driving the rotation of the rotating beam, and the driving unit can be realized by a motor (such as a stepping motor and the like).

The second control unit is connected with and controls the driving unit to adjust the setting angle of the photovoltaic module so as to follow the sun. In a specific implementation example, the second control unit may calculate the rotation angle of the driving unit required to drive the rotating beam according to a photovoltaic tracking algorithm. Possibly, the photovoltaic tracking algorithm may be, for example, based on light intensity control, or based on geographic position and time control (such as sun position according to longitude and latitude versus time), etc. In addition, the second control unit is further configured to output a control instruction to the bearing 201 to control the direction of the current flowing through the electromagnet in the bearing 201 to set the magnetic field direction of the electromagnet, that is, to generate a repulsive force to set the bearing in a rotation-restricted state, or to generate a attractive force to set the bearing 201 in a rotatable state. The protection cost of the saved photovoltaic bracket can be greatly reduced by adopting the bearing capable of controlling the rotation restriction or release.

The embodiment of the present disclosure may further provide a photovoltaic power generation system, including: at least one photovoltaic power generation device; the photovoltaic power generation device includes: a photovoltaic bracket as shown in the embodiment of fig. 9; and the photovoltaic module is loaded on the rotating beam of the photovoltaic bracket. The overall cost of the photovoltaic power generation device adopting the photovoltaic bracket with the reduced protection cost is also reduced, and the cost of the whole photovoltaic power generation system is reduced considerably.

To sum up, in the embodiment of the present disclosure, the bearing, the photovoltaic support and the photovoltaic power generation system, the bearing includes: the bearing shell is provided with an electromagnet; the inner surface of the bearing outer ring forms a communication part and at least one limit part which are axially arranged; the bearing inner ring is arranged in the bearing outer ring in a relatively rotatable manner; the sliding piece is arranged between the bearing outer ring and the bearing inner ring in a sliding way along the axial direction, and relative rotation between the sliding piece and the bearing inner ring is limited; the sliding piece has magnetism so as to be driven to slide by the magnetic force of the electromagnet; the sliding piece forms at least one limiting structure towards the outer surface of the bearing outer ring and comprises a radially elastically telescopic locking block; the locking piece slides along the sliding piece to be aligned with and combined with the limiting part or the communicating part, so that the ingenious structure of limiting the relative rotation of the inner ring and the outer ring of the bearing or removing the limitation is achieved, the support protection is realized from the bearing angle instead of the photovoltaic support angle, the extra cost brought by the multipoint driving, reinforcing or thickening photovoltaic support, the reciprocating damper and the like in the related technology is saved, and the contradiction between the structure protection and the cost of the photovoltaic tracking support can be effectively solved

The above embodiments are merely illustrative of the principles of the present disclosure and its efficacy, and are not intended to limit the disclosure. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present disclosure. Accordingly, it is intended that all equivalent modifications and variations which a person having ordinary skill in the art would accomplish without departing from the spirit and technical spirit of the present disclosure be covered by the claims of the present disclosure.

Claims

1. A bearing, comprising:

a bearing housing having a through portion formed therein and disposed in an axial direction, the through portion having an electromagnet fixedly disposed therein;

The bearing outer ring is arranged at the through part, at least one limiting part and a communicating part extending along the circumferential direction are formed on the inner surface of the bearing outer ring, and the limiting part and the communicating part are arranged along the axial direction;

The bearing inner ring is arranged in the bearing outer ring in a relatively rotatable manner, and a penetrating part which extends along the axial direction and is communicated with the through part is formed in the bearing inner ring;

The sliding part is arranged between the bearing outer ring and the bearing inner ring in a sliding way along the axial direction and is arranged with the bearing inner ring in a limited way relative to the rotation, the sliding part has magnetism and can be driven to slide by the magnetic force of the electromagnet, the sliding part forms at least one limiting structure towards the outer surface of the bearing outer ring, and the limiting structure comprises: the locking piece is elastically and telescopically arranged in the groove on the outer surface of the sliding piece along a radial direction pointing to the bearing outer ring, can extend out of the outer surface of the sliding piece in a non-compressed state, and can axially slide along with the sliding piece;

the sliding stroke of the sliding piece comprises a first position and a second position, when the sliding piece is in the first position, the locking piece is aligned and combined with the limiting part, the bearing outer ring and the bearing inner ring form relative rotation limitation, when the sliding piece is in the second position, the locking piece is aligned and combined with the communicating part, and the relative rotation limitation is relieved by the bearing outer ring and the bearing inner ring.

2. The bearing of claim 1, wherein the limited relative rotation between the slider and the bearing inner race comprises: at least one sliding rotation-stopping structure comprising: the sliding groove and the sliding block are matched in a relatively sliding way along the axial direction; one of the sliding groove and the sliding block is fixedly arranged at the position of the bearing inner ring in the circumferential direction, and the other sliding groove and the sliding block are fixedly arranged at the position of the sliding piece in the circumferential direction.

3. The bearing of claim 1, wherein the communication portion includes an annular groove provided along a circumferential direction of the slider, and the restraining portion includes a segment groove that mates with the lock piece.

4. The bearing of claim 1, wherein the sliding member is annular, a plurality of limiting structures are arranged along the circumferential direction of the sliding member, and the limiting parts are arranged in one-to-one correspondence with the limiting structures.

5. The bearing of claim 1, wherein the restraining structure comprises: at least one groove extending along the radial direction is provided with an elastic telescopic piece, and one end of the elastic telescopic piece, which points to the outside of the groove, is provided with a locking piece.

6. The bearing of claim 1, wherein the restraining structure comprises: the first locking piece and the second locking piece are arranged along the axial direction and are arranged on the sliding piece, and the first locking piece and the second locking piece are respectively combined with the limiting part and the communicating part.

7. The bearing of claim 6, wherein a length of a spacing segment between the restraining portion and the communicating portion is greater than a spacing between the first lock piece and the second lock piece.

8. The bearing of claim 1, wherein the outer end surface of the lock block is a convex surface including first and second guide portions facing respectively opposite sides of the axial direction; the first and second guide portions include: curved or beveled surfaces.

9. The bearing of claim 1, wherein an electronic control module is disposed in the bearing housing; the electric control module comprises:

a power supply unit for supplying power to the electromagnet;

And a first control unit for controlling a direction of a current flowing through the electromagnet to set a magnetic field direction of the electromagnet in response to a control instruction, to form or release the relative rotation restriction.

10. A photovoltaic bracket, comprising:

the bearing of any one of claims 1 to 9;

And the rotating beam passes through the penetrating part of the bearing inner ring in a matched manner and is used for loading the photovoltaic module.

11. The photovoltaic bracket of claim 10, wherein the photovoltaic bracket is a photovoltaic tracking bracket comprising:

A driving unit for driving the rotation of the rotation beam;

the second control unit is connected with and controls the driving unit to adjust the setting angle of the photovoltaic module; the second control unit is also used for outputting control instructions to the bearing so as to control the direction of current flowing through the electromagnet to set the magnetic field direction of the electromagnet.

12. A photovoltaic power generation system, comprising: at least one photovoltaic power generation device;

the photovoltaic power generation device includes:

The photovoltaic bracket of claim 10 or 11;

and the photovoltaic module is loaded on the rotating beam of the photovoltaic bracket.