Damping bearing and photovoltaic tracking support

Abstract

The invention provides a bearing with damping and a photovoltaic tracking support, and relates to the technical field of photovoltaic supports. The bearing with the damping comprises a bearing inner ring and a bearing seat, the bearing seat is arranged outside the bearing inner ring in a sleeving mode, and the bearing inner ring is used for being connected with a main shaft. A damping cavity is formed between the bearing inner ring and the bearing seat and used for containing damping liquid. Meanwhile, a plurality of damping fins located in the damping cavity are arranged on the bearing inner ring, the bearing seat is provided with an inner circumferential surface used for limiting the damping cavity, and the damping fins and the inner circumferential surface are arranged at intervals, so that a damping gap is formed between the damping fins and the inner circumferential surface, and damping force is generated when the bearing inner ring rotates relative to the bearing seat in case of wind-induced disasters; meanwhile, due to the fact that the damping fins are arranged on the bearing inner ring, a damping gap is fixed in the operation process of the structure, and a constant damping value is generated under the condition of a certain rotating speed, so that the requirements of damping ratios under various working conditions are met, and the resisting effect of wind-induced disasters is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic brackets, and in particular to a bearing with damping and a photovoltaic tracking bracket. Background Art

[0002] In the field of photovoltaic tracking brackets, photovoltaic tracking systems are used to track the position of the sun to maximize the efficiency of solar panels receiving solar radiation. These systems usually include large structures whose tracking movements require highly precise control and smooth movement. In high wind pressure areas, as the span of the bracket becomes longer, it is more susceptible to wind-induced disasters: buffeting, vortex vibration, flutter, etc., which can cause serious damage to the bracket and components, resulting in huge economic losses.

[0003] In order to improve the impact of wind disasters on photovoltaic tracking brackets during use, damping bearings are currently installed in some photovoltaic tracking brackets. Damping bearings play a key role in these systems, helping to reduce structural vibrations and ensure the stability of photovoltaic panels, thereby increasing energy output. However, existing damping bearings are difficult to generate stable damping force when resisting wind disasters, which has a negative impact on the resistance effect of wind disasters. Summary of the invention

[0004] The purpose of the present invention is to provide a bearing with damping, which can improve the technical problem of unstable damping force in the prior art and enhance the effect of resisting wind-induced disasters.

[0005] Another object of the present invention is to provide a photovoltaic tracking bracket, which can improve the technical problem of unstable damping force in the prior art and enhance the effect of resisting wind-induced disasters.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A damped bearing, comprising a bearing inner ring and a bearing seat, wherein the bearing seat is sleeved outside the bearing inner ring, and the bearing inner ring is used to be connected to a main shaft; a damping cavity is formed between the bearing inner ring and the bearing seat, and the damping cavity is used to accommodate a damping fluid; a plurality of damping plates located in the damping cavity are arranged on the bearing inner ring, and the plurality of damping plates are distributed at intervals around the circumference of the bearing inner ring; the bearing seat has an inner circumferential surface for defining the damping cavity, and the damping plates are spaced apart from the inner circumferential surface to form a damping gap between the damping plates and the inner circumferential surface.

[0008] Optionally, the damping plate is arranged to be inclined relative to the radial direction of the bearing inner ring, and the damping plate includes a first damping plate and a second damping plate, and the inclination direction of the first damping plate is opposite to the inclination direction of the second damping plate.

[0009] Optionally, the first damping plate and the second damping plate are symmetrically distributed on both radial sides of the bearing inner ring.

[0010] Optionally, the number of the first damping plates is the same as that of the second damping plates, and the inclination angle of the first damping plates is the same as that of the second damping plates.

[0011] Optionally, the inclination angle of the first damping sheet is α1, 40°≤α1≤50°; and / or,

[0012] The inclination angle of the second damping plate is α2, 40°≤α2≤50°.

[0013] Optionally, the damping plate has a first side surface and a second side surface facing the adjacent damping plate, and an end of the damping plate close to the bearing seat along the radial direction of the bearing inner ring is provided with fillets on the first side surface and the second side surface.

[0014] Optionally, the radius of the fillet is half the thickness of the damping plate.

[0015] Optionally, the bearing inner ring comprises an inner ring body and a boss arranged on the inner ring body, the boss protrudes in the radial direction of the inner ring body, and the boss and the inner ring body form a step structure; the inner ring body has a first outer peripheral surface for defining the damping cavity, the boss has a first end surface for defining the damping cavity, the radial inner end of the damping plate is fixedly connected to the first outer peripheral surface, and one axial end of the damping plate is fixedly connected to the first end surface;

[0016] The damped bearing further comprises a first sleeve, which is disposed between the boss and the bearing seat so that the boss and the bearing seat can be rotatably matched.

[0017] Optionally, the damped bearing further comprises a first end cover arranged on a side of the boss away from the damping plate, the inner ring body comprises a second outer peripheral surface located on a side of the boss away from the damping plate, the first end cover is sleeved on the second outer peripheral surface, and a first skeleton oil seal is arranged between the first end cover and the second outer peripheral surface;

[0018] The radial outer end of the first end cover cooperates with the end surface of the bearing seat, and a first sealing ring is arranged between the end surface of the bearing seat and the first end cover.

[0019] Optionally, the damped bearing also includes a second end cover arranged on one side of the damping plate, the second end cover having a second end face for defining the damping cavity; the bearing inner ring has a first outer peripheral surface for defining the damping cavity and a third outer peripheral surface arranged on one side of the first outer peripheral surface, the radial dimension of the third outer peripheral surface is smaller than the radial dimension of the first outer peripheral surface; the damping plate is fixedly connected to the first outer peripheral surface, the second end cover is sleeved on the third outer peripheral surface, and a second sleeve is arranged between the second end cover and the third outer peripheral surface so that the bearing inner ring and the second end cover can be rotatably matched; the radial outer end of the second end cover is matched with the bearing seat.

[0020] Optionally, a second skeleton oil seal is further provided between the second end cover and the third outer peripheral surface, and the second skeleton oil seal is located on a side of the second shaft sleeve away from the first outer peripheral surface;

[0021] A second sealing ring is also arranged between the second end cover and the bearing seat.

[0022] A photovoltaic tracking bracket comprises a column, a main shaft and the above-mentioned damped bearing; the bearing seat of the damped bearing is fixedly connected to the column, and the main shaft is fixedly connected to the inner ring of the bearing of the damped bearing, so that the main shaft is rotatably supported on the column through the damped bearing.

[0023] The beneficial effects of the damped bearing and photovoltaic tracking bracket provided by the embodiments of the present invention include:

[0024] An embodiment of the present invention provides a bearing with damping, which includes a bearing inner ring and a bearing seat, wherein the bearing seat sleeve is arranged outside the bearing inner ring, and the bearing inner ring is used to connect with the main shaft. A damping cavity is formed between the bearing inner ring and the bearing seat, and the damping cavity is used to contain damping fluid. At the same time, a plurality of damping plates located in the damping cavity are arranged on the bearing inner ring, and the plurality of damping plates are distributed at intervals around the circumference of the bearing inner ring. The bearing seat has an inner circumferential surface for defining the damping cavity, and the damping plates are arranged at intervals with the inner circumferential surface, so that a damping gap is formed between the damping plates and the inner circumferential surface, so that when the bearing inner ring is subjected to a wind-induced disaster and rotates relative to the bearing seat, the damping plate cuts the damping fluid and the damping fluid generates a damping force in the process of passing over the damping plate from the damping gap, thereby absorbing and consuming wind load energy. At the same time, since the damping plate is arranged on the bearing inner ring, the damping gap is fixed during the operation of the structure, and a constant damping value is generated under a constant speed, thereby adapting to the requirements of the damping ratio under various working conditions and improving the wind-induced disaster resistance effect.

[0025] The embodiment of the present invention further provides a photovoltaic tracking bracket, which includes the above-mentioned bearing with damping. Since the photovoltaic tracking bracket includes the above-mentioned bearing with damping, it also has the beneficial effect of generating a constant damping value under a constant rotation speed, thereby adapting to the requirements of damping ratio under various working conditions and improving the resistance effect to wind-induced disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0027] Figure 1 A schematic diagram of the overall structure of a bearing with damping provided according to one aspect of the present invention is shown;

[0028] Figure 2 A schematic diagram of an exploded structure of a bearing with damping provided according to one aspect of the present invention is shown;

[0029] Figure 3 A schematic diagram of the structure of a damped bearing provided in accordance with one aspect of the present invention is shown in a top view;

[0030] Figure 4 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0031] Figure 5 A schematic structural diagram of a bearing inner ring in a bearing with damping provided according to one aspect of the present invention is shown;

[0032] Figure 6 Shows Figure 3 Partial schematic diagram of the cross-sectional structure at BB in the middle.

[0033] Reference numerals:

[0034] 100-bearing with damping; 110-bearing inner ring; 111-inner ring body; 112-first outer peripheral surface; 113-second outer peripheral surface; 114-third outer peripheral surface; 115-boss; 116-first end surface; 117-through hole; 120-damping plate; 121-first damping plate; 122-second damping plate; 123-first side surface; 124-second side surface; 125-fillet; 131-bearing seat; 132-first end cover; 133-first sealing ring; 134-first skeleton oil seal; 135-second sealing ring; 136-second skeleton oil seal; 137-first shaft sleeve; 138-second shaft sleeve; 140-second end cover; 141-second end surface; 150-damping chamber. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0036] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Figure 1 The overall structural diagram of the bearing 100 with damping provided in this embodiment is as follows. Figure 2 The exploded structural diagram of the bearing 100 with damping provided in this embodiment is as follows. Figure 3 The top view of the bearing 100 with damping provided in this embodiment is a schematic diagram. Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle. Figure 5 This is a schematic diagram of the structure of the bearing inner ring 110 in the bearing 100 with damping provided in this embodiment. Figure 1-Figure 5 This embodiment provides a bearing 100 with damping, and also provides a photovoltaic tracking bracket (not shown).

[0040] The photovoltaic tracking bracket includes a damped bearing 100, as well as a column and a main shaft. The bearing seat 131 of the damped bearing 100 is fixedly installed on the column, and the bearing inner ring 110 of the damped bearing 100 is fixedly connected to the main shaft. In this way, the main shaft is rotatably supported on the column by the damped bearing 100. The main shaft is used to install photovoltaic modules. In this way, the photovoltaic modules are driven to rotate as the main shaft rotates, thereby realizing the photovoltaic modules tracking the sun and improving the efficiency of photovoltaic power generation.

[0041] It should be noted that, in this embodiment, the bearing inner ring 110 has a substantially square through hole 117, and accordingly, the cross section of the spindle installed in the bearing inner ring 110 is square. It is understandable that in some other embodiments, the shape of the through hole 117 in the bearing inner ring 110 can also be set according to requirements to install spindles with other cross-sectional shapes. For example, the through hole 117 in the bearing inner ring 110 is set to an octagon, and accordingly, the spindle with an octagonal cross section can be installed in the bearing inner ring 110. It is understandable that in some other embodiments, the damped bearing 100 can also be used in other scenarios.

[0042] The embodiment of the present invention further provides a bearing 100 with damping, which includes a bearing inner ring 110 and a bearing seat 131, wherein the bearing seat 131 is sleeved outside the bearing inner ring 110, and the bearing inner ring 110 is used to connect with the main shaft. A damping chamber 150 is formed between the bearing inner ring 110 and the bearing seat 131, and the damping chamber 150 is used to contain a damping liquid. Specifically, the damping liquid can be a liquid that can generate viscous resistance, such as silicone oil.

[0043] At the same time, the bearing inner ring 110 is provided with a plurality of damping plates 120 located in the damping cavity 150, and the plurality of damping plates 120 are spaced around the circumference of the bearing inner ring 110. The bearing seat 131 has an inner circumferential surface for defining the damping cavity 150, and the damping plates 120 are spaced from the inner circumferential surface, so that a damping gap is formed between the damping plates 120 and the inner circumferential surface. In this way, when the bearing inner ring 110 rotates relative to the bearing seat 131 due to wind disasters, the damping fluid generates a damping force in the process of passing over the damping plates 120 from the damping gap, thereby absorbing and consuming wind load energy. At the same time, since the damping plates 120 are arranged on the bearing inner ring 110, the damping gap is fixed during the operation of the structure, and a constant damping value is generated under a constant rotation speed, thereby adapting to the requirements of the damping ratio under various working conditions and improving the wind disaster resistance effect. In the process of the photovoltaic tracking bracket tracking the sun angle and rotating, since the bearing inner ring 110 rotates slowly, the damping force generated accordingly is small, which will not affect the normal operation of the photovoltaic tracking bracket.

[0044] In this embodiment, the damping plate 120 is tilted relative to the radial direction of the bearing inner ring 110 , and the damping plate 120 includes a first damping plate 121 and a second damping plate 122 , and the first damping plate 121 and the second damping plate 122 are tilted in opposite directions.

[0045] It should be noted that, in this embodiment, the damped bearing 100 has an axial direction and a radial direction, and the bearing seat 131 is coaxially arranged with the bearing inner ring 110. Therefore, in this embodiment, the axial direction of the damped bearing 100 is the axial direction of the bearing seat 131, the axial direction of the bearing inner ring 110, and also the axial direction of other components of the damped bearing 100 mentioned below. Similarly, the radial direction of the damped bearing 100 is the radial direction of the bearing seat 131, the radial direction of the bearing inner ring 110, and also the radial direction of other components of the damped bearing 100 mentioned below. At the same time, in the description of this embodiment, the radial inner end of a component is the end of the component radially close to the axis, and correspondingly, the radial outer end of a component is the end of the component radially away from the axis.

[0046] Specifically, the first damping plate 121 is inclined in a clockwise direction relative to the radial direction of the bearing inner ring 110 , and the second damping plate 122 is inclined in a counterclockwise direction relative to the radial direction of the bearing inner ring 110 .

[0047] When the bearing inner ring 110 rotates clockwise relative to the bearing seat 131, the first damping plate 121 and the second damping plate 122 both rotate relative to the bearing seat 131. Since the inclination direction of the first damping plate 121 and the rotation direction have the same trend, and the inclination direction of the second damping plate 122 and the rotation direction have the opposite trend, the first damping plate 121 cuts the damping plate 120 when rotating, and the cutting inclined plane (i.e., the side of the damping plate 120) and the angle are larger, thereby generating a larger damping torque, and the cutting inclined plane and the angle of the second damping plate 122 are smaller, thereby generating a smaller damping torque. In other words, when the bearing inner ring 110 rotates clockwise, the damping force is mainly generated by the first damping plate 121.

[0048] When the bearing inner ring 110 rotates counterclockwise relative to the bearing seat 131, the first damping plate 121 and the second damping plate 122 both rotate relative to the bearing seat 131. Since the inclination direction of the second damping plate 122 has the same trend as the rotation, and the inclination direction of the first damping plate 121 has an opposite trend to the rotation direction, the second damping plate 122 cuts the damping plate 120 when rotating, and the cutting inclined plane and angle are larger, thereby generating a larger damping torque. The cutting inclined plane and angle of the first damping plate 121 are smaller, thereby generating a smaller damping torque. In other words, when the bearing inner ring 110 rotates counterclockwise, the damping force is mainly generated by the second damping plate 122.

[0049] Furthermore, the first damping plate 121 and the second damping plate 122 are symmetrically distributed on both radial sides of the bearing inner ring 110. Specifically, in this embodiment, the first damping plate 121 and the second damping plate 122 have the same structural dimensions, the same inclination angles, and the same number, so as to ensure that when the speed is the same, the damping force generated by the first damping plate 121 when the bearing inner ring 110 rotates clockwise is consistent with the damping force generated by the second damping plate when the bearing inner ring 110 rotates counterclockwise. Multiple first damping plates 121 are distributed as follows: Figure 5 On the left side of the bearing inner ring 110 shown in FIG. 1 , a plurality of second damping sheets 122 are distributed as shown in FIG. Figure 5 The right side of the bearing inner ring 110 is shown in FIG.

[0050] Since the damping plate 120 is tilted, the tilt angle of the damping plate 120 will affect the magnitude of the damping force generated. Specifically, the more inclined the damping plate 120 is, that is, the larger the tilt angle is, the smaller the damping force generated at the same rotational speed. Therefore, when performing the structural design of the damped bearing 100, the tilt angle of the damping plate 120 can be specifically set according to the design requirements.

[0051] Preferably, the inclination angle of the first damping plate 121 is α1, 40°≤α1≤50°, and optionally, the inclination angle α1 of the first damping plate 121 can be set to 40°, 45° or 50°. The inclination angle of the second damping plate 122 is α2, 40°≤α2≤50°, and optionally, the inclination angle α2 of the second damping plate 122 can be set to 40°, 45° or 50°.

[0052] Please continue to refer to Figure 1-Figure 5 In this embodiment, the damping plate 120 has a first side surface 123 and a second side surface 124 facing the adjacent damping plate 120, and the end of the damping plate 120 close to the bearing seat 131 along the radial direction of the bearing inner ring 110 is provided with a fillet 125 on the first side surface 123 and the second side surface 124.

[0053] Specifically, the damping plate 120 is a sheet-shaped member, and its radial outer end is formed by a first side surface 123, a second side surface 124, and a top surface between the first side surface 123 and the second side surface 124. The first side surface 123 and the top surface are smoothly transitioned through a fillet 125, and the second side surface 124 and the top surface are smoothly transitioned through a fillet 125. In this way, the damping fluid enters and exits the damping gap through the arc surface, and the size of the fillet 125 is negatively correlated with the generated damping force. Under the condition of a constant rotation speed, the larger the size of the fillet 125, that is, the flatter the fillet 125, the smaller the damping fluid generated under the action of the damping plate 120.

[0054] Preferably, the radius of the fillet 125 is half the thickness of the damping plate 120. Specifically, the thickness of the damping plate 120 is the distance between the first side surface 123 and the second side surface 124. Since the fillets 125 are provided at both the first side surface 123 and the second side surface 124, that is, the fillets 125 are provided at both sides of the end of the damping plate 120 close to the bearing seat 131, when the radius of the fillet 125 is half the thickness of the damping plate 120, the two fillets 125 are connected to each other to form a complete semicircular arc surface, and the top surface has become the fillet 125.

[0055] Figure 6 Shows Figure 3 A partial schematic diagram of the cross-sectional structure at BB in the middle, specifically, Figure 6 Only shown Figure 3 The upper part of the cross-sectional view obtained along the BB section. Please refer to Figure 1-Figure 6 In this embodiment, the bearing inner ring 110 includes an inner ring body 111 and a boss 115 disposed on the inner ring body 111. The boss 115 protrudes radially from the inner ring body 111, so that the boss 115 and the inner ring body 111 form a step structure. The inner ring body 111 has a first outer peripheral surface 112 for defining a damping cavity 150, and the boss 115 has a first end surface 116 for defining the damping cavity 150. Thus, the damping cavity 150 is closed on one side along the axial direction of the damped bearing 100 by the boss 115, and the first end surface 116 and the first outer peripheral surface 112 are two step surfaces of the step structure. The radial inner end of the damping plate 120 is fixedly connected to the first outer peripheral surface 112, and the axial direction of the damping plate 120 (i.e., Figure 6 One end of the D direction is fixedly connected to the first outer peripheral surface 112.

[0056] The damped bearing 100 further includes a first sleeve 137 , which is disposed radially outward of the boss 115 and between the boss 115 and the bearing seat 131 , so that the boss 115 and the bearing seat 131 can be rotatably matched, and the bearing inner ring 110 can rotate relative to the bearing seat 131 .

[0057] Specifically, the inner ring body 111, the boss 115 and the plurality of damping sheets 120 are an integrated structure, the first outer peripheral surface 112 is located on one side of the axial direction of the boss 115, and accordingly, the formed damping cavity 150 is located on one side of the axial direction of the boss 115. The first sleeve 137 is a copper sleeve, and its inner peripheral surface cooperates with the outer peripheral surface of the boss 115, and the outer peripheral surface of the first sleeve 137 cooperates with the inner peripheral surface of the bearing seat 131, thereby realizing the rotational cooperation between the boss 115 and the bearing seat 131, and further realizing the rotational cooperation between the bearing inner ring 110 and the bearing seat 131.

[0058] Furthermore, the damped bearing 100 further includes a first end cover 132 disposed on the side of the boss 115 away from the damping plate 120, the radial inner end of the first end cover 132 cooperates with the boss 115, and the radial outer end of the first end cover 132 cooperates with the bearing seat 131. The inner ring body 111 has a second outer peripheral surface 113 located on the side of the boss 115 away from the damping plate 120, the first end cover 132 is sleeved on the second outer peripheral surface 113, and a first skeleton oil seal 134 is disposed between the first end cover 132 and the second outer peripheral surface 113, so that the first end cover 132 and the bearing inner ring 110 are sealed by the first skeleton oil seal 134. At the same time, a first sealing ring 133 is disposed between the end surface of the bearing seat 131 and the first end cover 132, and the first end cover 132 and the bearing seat 131 are sealed by the first sealing ring 133.

[0059] Specifically, the boss 115 has a third end cover opposite to the first end face 116, the third end face is flush with the end face on the axial side of the bearing seat 131, forming a mating surface that matches the end face on the axial side of the first end cover 132, and a sealing groove is provided on the end face on the axial side of the first end cover 132, and the first sealing ring 133 is installed in the sealing groove. The inner circumference of the first end cover 132 matches the second outer circumference 113, and a groove for installing the first skeleton oil seal 134 is provided on the inner circumference of the first end cover 132.

[0060] Optionally, the first end cover 132 may be fixedly connected to the bearing seat 131 by fasteners such as bolts.

[0061] Please continue to refer to Figure 1-Figure 6 In this embodiment, the damped bearing 100 further includes a second end cover 140 disposed on one side of the damping plate 120, and the second end cover 140 has a second end surface 141 for defining a damping chamber 150. The bearing inner ring 110 has a third outer peripheral surface 114 disposed on one side of the first outer peripheral surface 112, and the radial dimension of the third outer peripheral surface 114 is smaller than the radial dimension of the first outer peripheral surface 112. The second end cover 140 is sleeved on the third outer peripheral surface 114, and a second sleeve 138 is disposed between the second end cover 140 and the third outer peripheral surface 114, so that the bearing inner ring 110 and the second end cover 140 can be rotatably matched. The radial outer end of the second end cover 140 is matched with the bearing seat 131.

[0062] Specifically, the second end cover 140 and the first end cover 132 are relatively located on both sides of the boss 115, the second end face 141 of the second end cover 140 faces the first end face 116 of the boss 115, and the second end face 141 is spaced from the first end face 116, so that a damping cavity 150 is formed between the first end face 116 and the second end face 141. The first outer peripheral surface 112 is located in the axial middle of the bearing inner ring 110, the second outer peripheral surface 113 and the third outer peripheral surface 114 are respectively located on both sides of the first outer peripheral surface 112 in the axial direction, and the boss 115 is located between the first outer peripheral surface 112 and the second outer peripheral surface 113. The radial dimension of the third outer peripheral surface 114 is smaller than the radial dimension of the first outer peripheral surface 112, that is, the first outer peripheral surface 112 is protruded relative to the third outer peripheral surface 114, and one axial end of the second sleeve 138 abuts against one side of the protrusion, thereby axially limiting the second sleeve 138. At the same time, the second end cover 140 is provided with a protrusion abutting against the other axial end of the second sleeve 138. Optionally, the second sleeve 138 is a copper sleeve.

[0063] Further, a second sealing ring 135 is also provided between the second end cover 140 and the bearing seat 131. Specifically, the outer circumference of the second end cover 140 cooperates with the inner circumference of the bearing seat 131, and a sealing groove is provided on the outer circumference of the second end cover 140. The second sealing ring 135 is arranged in the sealing ring and seals with the inner circumference of the bearing seat 131. Optionally, a second skeleton oil seal 136 is also provided between the second end cover 140 and the third outer circumference 114. Specifically, a groove is provided on the raised portion of the second end cover 140, and the second skeleton oil seal 136 is sleeved on the third outer circumference 114 and is located in the groove.

[0064] Furthermore, a protrusion is also provided on the outer circumference of the second end cover 140, and the protrusion cooperates with the side of the bearing seat 131 axially away from the first end cover 132. Optionally, a connecting hole is provided at the protrusion, and the second end cover 140 is fixedly connected to the bearing seat 131 by bolts passing through the connecting hole.

[0065] In this embodiment, the damping chamber 150 is defined by the inner circumferential surface of the bearing seat 131, the first outer circumferential surface 112 of the bearing inner ring 110, the first end surface 116 of the boss 115, and the second end surface 141 of the second end cover 140, and the damping chamber 150 is sealed by the first sealing ring 133, the second sealing ring 135, the first skeleton oil seal 134, and the second skeleton oil seal 136. At the same time, in order to add the damping fluid in the damping chamber 150 during the operation of the bearing 100 with damping, an oil hole (not shown) connected to the damping fluid can be opened on the bearing seat 131, and accordingly, the bearing 100 with damping also includes a retaining valve (not shown) installed at the oil hole to close the oil hole and maintain the pressure balance between the damping chamber 150 and the outside.

[0066] The damping force generated by the damped bearing 100 and the photovoltaic tracking bracket provided by the embodiments of the present invention depends on the inclination angle of the damping plate 120, the size of the fillet 125, the rotation speed and the distance between adjacent damping plates 120. During the design process, the inclination angle of the damping plate 120, the size of the fillet 125 and the distance between adjacent damping plates 120 can be set according to the required damping force. After the structure of the bearing inner ring 110 is determined, the inclination angle of the damping plate 120, the size of the fillet 125 and the distance between adjacent damping plates 120 will not change with the operation of the damped bearing 100. Therefore, the damping force changes with the rotation speed, which truly achieves the effect of being strong when strong and weak when weak, optimizing efficiency and energy consumption, and also ensuring that the damping force generated is stable under a constant rotation speed. When the main shaft of the photovoltaic tracking bracket rotates clockwise, the inner ring 110 of the bearing rotates clockwise relative to the bearing seat 131. At this time, the damping force is mainly generated by the first damping plate 121, and the damping force generated by the second damping plate 122 is smaller; when the main shaft of the photovoltaic tracking bracket rotates counterclockwise, the inner ring 110 of the bearing rotates counterclockwise relative to the bearing seat 131. At this time, the damping force is mainly generated by the second damping plate 122, and the damping force generated by the first damping plate 121 is smaller.

[0067] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A damped bearing, comprising a bearing inner ring and a bearing seat, wherein the bearing seat is sleeved outside the bearing inner ring, and the bearing inner ring is used to connect with a main shaft; characterized in that: A damping cavity is formed between the bearing inner ring and the bearing seat, and the damping cavity is used to accommodate damping fluid; a plurality of damping plates located in the damping cavity are arranged on the bearing inner ring, and the plurality of damping plates are distributed at intervals around the circumference of the bearing inner ring; the bearing seat has an inner circumferential surface for defining the damping cavity, and the damping plates are arranged at intervals from the inner circumferential surface to form a damping gap between the damping plates and the inner circumferential surface.

2. The damped bearing according to claim 1, characterized in that: The damping plate is arranged to be inclined relative to the radial direction of the bearing inner ring, and the damping plate includes a first damping plate and a second damping plate, and the inclination direction of the first damping plate is opposite to the inclination direction of the second damping plate.

3. The damped bearing according to claim 2, characterized in that: The first damping plate and the second damping plate are symmetrically distributed on both radial sides of the bearing inner ring.

4. The damped bearing according to claim 2, characterized in that: The number of the first damping plates is the same as that of the second damping plates, and the inclination angle of the first damping plates is the same as that of the second damping plates.

5. The damped bearing according to claim 2, characterized in that: The inclination angle of the first damping plate is α1, 40°≤α1≤50°; and / or, The inclination angle of the second damping plate is α2, 40°≤α2≤50°.

6. The damped bearing according to claim 1, characterized in that: The damping plate has a first side surface and a second side surface facing the adjacent damping plate, and the end of the damping plate close to the bearing seat along the radial direction of the bearing inner ring is provided with fillets on the first side surface and the second side surface.

7. The damped bearing according to claim 6, characterized in that: The radius of the fillet is half the thickness of the damping plate.

8. The damped bearing according to claim 1, characterized in that: The bearing inner ring comprises an inner ring body and a boss arranged on the inner ring body, the boss protrudes in the radial direction of the inner ring body, and the boss and the inner ring body form a step structure; the inner ring body has a first outer peripheral surface for defining the damping cavity, the boss has a first end surface for defining the damping cavity, the radial inner end of the damping plate is fixedly connected to the first outer peripheral surface, and one axial end of the damping plate is fixedly connected to the first end surface; The damped bearing further comprises a first sleeve, which is disposed between the boss and the bearing seat so that the boss and the bearing seat can be rotatably matched.

9. The damped bearing according to claim 8, characterized in that: The damped bearing further comprises a first end cover arranged on a side of the boss away from the damping plate, the inner ring body comprises a second outer peripheral surface located on a side of the boss away from the damping plate, the first end cover is sleeved on the second outer peripheral surface, and a first skeleton oil seal is arranged between the first end cover and the second outer peripheral surface; The radial outer end of the first end cover cooperates with the end surface of the bearing seat, and a first sealing ring is arranged between the end surface of the bearing seat and the first end cover.

10. The damped bearing according to claim 1, characterized in that: The damped bearing also includes a second end cover arranged on one side of the damping plate, the second end cover has a second end face for defining the damping cavity; the bearing inner ring has a first outer peripheral surface for defining the damping cavity and a third outer peripheral surface arranged on one side of the first outer peripheral surface, the radial dimension of the third outer peripheral surface is smaller than the radial dimension of the first outer peripheral surface; the damping plate is fixedly connected to the first outer peripheral surface, the second end cover is sleeved on the third outer peripheral surface, and a second shaft sleeve is arranged between the second end cover and the third outer peripheral surface, so that the bearing inner ring and the second end cover can be rotatably matched; the radial outer end of the second end cover is matched with the bearing seat.

11. The damped bearing according to claim 10, characterized in that: A second skeleton oil seal is further provided between the second end cover and the third outer peripheral surface, and the second skeleton oil seal is located on a side of the second shaft sleeve away from the first outer peripheral surface; A second sealing ring is also arranged between the second end cover and the bearing seat.

12. A photovoltaic tracking bracket, characterized in that: The photovoltaic tracking bracket includes a column, a main shaft and a damped bearing as described in any one of claims 1 to 11; the bearing seat of the damped bearing is fixedly connected to the column, and the main shaft is fixedly connected to the inner ring of the damped bearing, so that the main shaft is rotatably supported on the column through the damped bearing.

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