Damping bearing with adjustable damping force and photovoltaic tracking support

Abstract

The embodiment of the invention provides a damping bearing with adjustable damping force and a photovoltaic tracking support, and relates to the field of photovoltaic tracking supports. The problems that under the condition that damping is provided by a bearing, the thermal expansion coefficient of internal silicone oil is high, and the overpressure phenomenon is prone to being generated after heating expansion are solved. The bearing comprises a bearing seat, a bearing inner ring, a sliding ring, a first end cover, a second end cover and a spring, a first cavity and a second cavity which are distributed in the axial direction are formed between the bearing inner ring and the bearing seat, and the second cavity is used for containing silicone oil; the slip ring seat is slidably arranged in the first cavity, and the first ring slidably extends into the second cavity; the spring is fixed between the first end cover and the sliding ring seat, and the spring has the movement trend of pushing the sliding ring seat to move in the axial direction from the first cavity to the second cavity. The volume of the second cavity containing the silicone oil or the overlapping area of the sliding ring in the second cavity is automatically adjusted through the change of the volume of the silicone oil, the overpressure phenomenon is avoided, and passive adjustment of damping can be achieved through the effect of the spring.

Description

Technical Field

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

[0002] During the daily operation of the photovoltaic tracking bracket, the photovoltaic tracking structure components installed on the main beam are constantly facing multiple challenges from nature. These challenges mainly include but are not limited to severe weather conditions such as wind, snow, sand and dust. These natural factors are not only frequent and unpredictable, but their impact on the photovoltaic tracking structure components is often complex and far-reaching.

[0003] With the advancement of technology and the development of the photovoltaic industry, high-power photovoltaic modules have been widely used. This trend has led to the continuous increase in the span of photovoltaic modules, and at the same time, their flexibility has also increased. Such changes make photovoltaic modules more vulnerable to wind loads and susceptible to various wind-induced disasters such as buffeting, vortex vibration and flutter. These vibration phenomena will not only cause serious physical damage to the photovoltaic brackets and modules themselves, but also greatly reduce their power generation efficiency and service life, thereby causing huge economic losses.

[0004] To meet this challenge, various manufacturers in the photovoltaic industry have launched their own solutions. Among them, a common and effective approach is to add a set of damping rods to the main square tubes on both sides of the tracking bracket. When strong winds hit, these damping rods can play a key role by providing a reaction force to effectively resist wind pressure, thereby protecting photovoltaic modules from damage caused by wind disasters.

[0005] The second method is to use a pin-type damping bearing. This type of bearing uses a large number of pins to generate rotational damping in a viscous liquid, thereby achieving the performance required by the design. However, this approach has a significant problem: the excessive number of pins leads to high drilling costs, and the assembly process is also extremely cumbersome and time-consuming. These factors work together to make the cost of the entire product high.

[0006] The third method is to use a damping bearing with cross-arranged dynamic and static plates. This bearing generates rotational damping in a viscous liquid through the contact between the relative surfaces of the dynamic and static plates. Although this method reduces costs and simplifies the assembly process to a certain extent, new problems also arise. Since there is a certain gap between the dynamic and static plates, and this spacing is not a fixed value, the damping value is unstable. This instability may have an adverse effect on the overall performance and safety of the photovoltaic tracking bracket.

[0007] In addition, due to the high thermal expansion coefficient of the silicone oil inside the damping bearing, the volume expands greatly when the temperature rises, which will cause overpressure in the closed pressure vessel, leading to problems such as silicone oil leakage and container damage. Summary of the invention

[0008] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0009] The purpose of the present invention includes, for example, providing a damping bearing with adjustable damping force, which can improve the problem that the internal silicone oil has a high thermal expansion coefficient and is prone to overpressure due to thermal expansion when the bearing provides damping.

[0010] The purpose of the present invention also includes providing a photovoltaic tracking bracket, which can improve the problem that the internal silicone oil has a high thermal expansion coefficient and is prone to overpressure due to thermal expansion when the bearing provides damping.

[0011] The embodiments of the present invention can be implemented as follows:

[0012] An embodiment of the present invention provides a damping bearing with adjustable damping force, comprising a bearing seat, a bearing inner ring, a slip ring, a first end cover, a second end cover and a spring, wherein the bearing inner ring is arranged in the bearing seat, and a first chamber and a second chamber distributed in the axial direction are formed between the bearing inner ring and the bearing seat, and the second chamber is used to contain silicone oil; the slip ring comprises a slip ring seat and at least one first ring fixed to one end of the slip ring seat, the slip ring seat is slidably arranged in the first chamber, and the first ring slides into the second chamber; during the axial movement of the slip ring from the first chamber to the second chamber, the overlap area of ​​the first ring with the bearing inner ring and the bearing seat in the radial projection in the second chamber gradually increases; the first end cover and the second end cover are respectively used to be fixed at two ends of the bearing seat, and respectively abut against two ends of the bearing inner ring; the spring is fixed between the first end cover and the slip ring seat, and the spring has a movement tendency to push the slip ring seat to move axially from the first chamber to the second chamber.

[0013] In addition, the damping bearing with adjustable damping force provided by the embodiment of the present invention may also have the following additional technical features:

[0014] Optionally, at least one second ring is fixed on the outer periphery of the bearing inner ring in the second chamber; the first ring is axially slidably arranged between the second ring and the bearing seat, and / or the first ring is axially slidably arranged between the second ring and the bearing inner ring, and / or the first ring is axially slidably arranged between two adjacent second rings.

[0015] Optionally, the inner ring of the bearing seat is circumferentially provided with a first step portion protruding inward; the outer ring of the inner ring of the bearing is circumferentially provided with a first spacer sleeve protruding outward; a channel connecting the first chamber and the second chamber is formed between the first step portion and the first spacer sleeve, and the first ring is slidably arranged in the channel to be inserted into the second chamber.

[0016] Optionally, the damping bearing with adjustable damping force also includes a second spacer sleeve; the second spacer sleeve is arranged between the bearing seat and the slip ring seat, and the second spacer sleeve is provided with a guide groove extending axially; the bearing seat is provided with a limit block, and the limit block is clamped and fixed in the guide groove; the slip ring seat is provided with a guide block, and the guide block is slidably arranged in the guide groove, and the slip ring seat is used to move axially along the guide groove.

[0017] Optionally, the damping bearing with adjustable damping force also includes a spring seat; the spring seat is axially movably arranged between the first end cover and the slip ring seat, the spring is fixed between the spring seat and the slip ring, and the spring seat is used to compress or release the spring during axial movement.

[0018] Optionally, the damping bearing with adjustable damping force further includes an adjusting bolt; the adjusting bolt rotatably passes through the first end cover and is fixed to the spring seat; the adjusting bolt is used to drive the spring seat to reciprocate axially during rotation.

[0019] Optionally, an abutting end surface is provided at one end of the spring seat facing away from the spring; the abutting end surface is used to prevent the adjusting bolt from falling off the first end cover when the spring seat moves axially to abut against the first end cover.

[0020] Optionally, the spring seat is provided with a square groove, the end of the adjusting bolt is a square block structure, and the square block structure is clamped in the square groove; the damping bearing with adjustable damping force also includes a fastening screw, which passes through the spring seat and is fixed to the adjusting bolt.

[0021] Optionally, a third chamber is formed between the bearing inner ring and the bearing seat at one end close to the second end cover, the first chamber, the second chamber and the third chamber are arranged in sequence along the axial direction, and the third chamber is used to contain silicone oil; a plurality of fourth rings are arranged on the outer periphery of the bearing inner ring in the third chamber, a plurality of third rings are fixed on the inner side of the second end cover, and the plurality of third rings are interspersed between the plurality of fourth rings.

[0022] An embodiment of the present invention also provides a photovoltaic tracking bracket, which includes a main beam, a main shaft and a damping bearing with adjustable damping force; both ends of the main shaft are installed on the main beam through the damping bearing with adjustable damping force, and the main shaft is used to install photovoltaic components.

[0023] The beneficial effects of the damping bearing with adjustable damping force and the photovoltaic tracking bracket of the embodiment of the present invention include, for example:

[0024] A damping bearing with adjustable damping force comprises a bearing seat, a bearing inner ring, a slip ring, a first end cover, a second end cover and a spring, wherein the bearing inner ring is arranged in the bearing seat, and a first chamber and a second chamber distributed in the axial direction are formed between the bearing inner ring and the bearing seat, and the second chamber is used to contain silicone oil; the slip ring comprises a slip ring seat and at least one first ring fixed to one end of the slip ring seat, the slip ring seat is slidably arranged in the first chamber, and the first ring slides into the second chamber; in the process of axial movement of the slip ring from the first chamber to the second chamber, the overlapping area of ​​the first ring with the bearing inner ring and the bearing seat in the radial projection in the second chamber gradually increases; the first end cover and the second end cover are respectively used to be fixed to the two ends of the bearing seat, and respectively abut against the two ends of the bearing inner ring; the spring is fixed between the first end cover and the slip ring seat, and the spring has a movement tendency to push the slip ring seat to move axially from the first chamber to the second chamber.

[0025] When the temperature of the silicone oil inside the damping bearing rises, due to the high thermal expansion coefficient of silicone oil, the silicone oil will tend to expand in volume. The pressure generated by the volume expansion of the silicone oil will push the slip ring outward and compress the spring, thereby avoiding the overpressure phenomenon of the damping bearing due to the increase in silicone oil temperature. At the same time, the overlap area between the first ring and the bearing seat and the inner ring of the bearing is reduced, and the damping of the rotation of the inner ring of the bearing is reduced. The volume of the second chamber filled with silicone oil or the overlap area of ​​the slip ring in the second chamber is autonomously adjusted through the change in the volume of silicone oil to avoid the overpressure phenomenon, and the axial movement of the slip ring can be achieved by relying on the action of the spring, thereby realizing passive adjustment of the damping. 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 axial side view of a damping bearing with adjustable damping force provided by an embodiment of the present invention;

[0028] Figure 2 A front view of a damping bearing with adjustable damping force provided by an embodiment of the present invention;

[0029] Figure 3 A cross-sectional view taken along line AA of a damping bearing with adjustable damping force provided in an embodiment of the present invention;

[0030] Figure 4 A partial schematic diagram of a cross-sectional view taken along line AA of a damping bearing with adjustable damping force provided in an embodiment of the present invention;

[0031] Figure 5 A cross-sectional view of a BB of a damping bearing with adjustable damping force provided in an embodiment of the present invention;

[0032] Figure 6 A partial schematic diagram of a cross-sectional view of a BB of a damping bearing with adjustable damping force provided in an embodiment of the present invention.

[0033] Icons: damping bearing with adjustable damping force-10; bearing seat-100; bearing inner ring-110; first chamber-120; second chamber-130; third chamber-140; first ring-200; second ring-210; third ring-220; fourth ring-230; first end cover-300; second end cover-310; slip ring-400; slip ring seat-410; spring-420; spring seat-430; abutting end face-431 ; Adjusting bolt -440; Fastening screw -450; First step portion -500; First spacer -510; Second spacer -520; Guide groove -521; Limit block -530; Guide block -540; First O-ring -600; Second O-ring -610; Third O-ring -620; Fourth O-ring -630; Fifth O-ring -640; Sixth O-ring -650; First skeleton sealing ring -700; Second skeleton sealing ring -710. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Combine the following Figures 1 to 6 The damping bearing 10 with adjustable damping force provided in this embodiment is described in detail.

[0039] Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The embodiment of the present invention provides a damping bearing 10 with adjustable damping force, comprising a bearing seat 100, a bearing inner ring 110, a slip ring 400, a first end cover 300, a second end cover 310 and a spring 420. The bearing inner ring 110 is arranged in the bearing seat 100, and a first chamber 120 and a second chamber 130 distributed in the axial direction are formed between the bearing inner ring 110 and the bearing seat 100, and the second chamber 130 is used to contain silicone oil; the slip ring 400 comprises a slip ring seat 410 and at least one first ring 200 fixed to one end of the slip ring seat 410, the slip ring seat 410 is slidably arranged in the first chamber 120, and the first ring 20 0 slides into the second chamber 130; in the process of the slip ring 400 moving axially from the first chamber 120 to the second chamber 130, the overlapping area of ​​the first ring 200 in the second chamber 130 with the bearing inner ring 110 and the bearing seat 100 along the radial projection gradually increases; the first end cover 300 and the second end cover 310 are respectively used to be fixed to the two ends of the bearing seat 100, and respectively abut against the two ends of the bearing inner ring 110; the spring 420 is fixed between the first end cover 300 and the slip ring seat 410, and the spring 420 has a movement tendency to push the slip ring seat 410 to move axially from the first chamber 120 to the second chamber 130.

[0040] It should be noted that "the overlap area of ​​the first ring 200 with the bearing inner ring 110 and the bearing seat 100 in the second chamber 130" refers to the overlap area of ​​the first ring 200, the bearing inner ring 110 and the bearing seat 100 projected along the radial direction of the damping bearing within the second chamber 130. Similarly, in the present technical solution, unless otherwise specified, the overlap area refers to the overlap area projected along the radial direction. In the second chamber 130, when the bearing inner ring 110 rotates, the overlap area increases, the damping increases, and the overlap area decreases, the damping decreases.

[0041] The bearing inner ring 110 is arranged inside the bearing seat 100, the first end cover 300 seals and fixes the bearing seat 100 and one end of the bearing inner ring 110, and the second end cover 310 seals and fixes the bearing seat 100 and the other end of the bearing inner ring 110. The space between the outer wall of the bearing inner ring 110 and the inner wall of the bearing seat 100 forms a first chamber 120 and a second chamber 130, the first chamber 120 is used for slidingly installing the slip ring seat 410, and the second chamber 130 is used for containing silicone oil.

[0042] The slip ring seat 410 and the first ring 200 are both annular. The slip ring seat 410 is slidably mounted in the first chamber 120 between the bearing seat 100 and the bearing inner ring 110, and the first ring 200 is slidably mounted in the second chamber 130 between the bearing seat 100 and the bearing inner ring 110. Figure 4 4. The relative positions in the embodiment are described, the first chamber 120 and the second chamber 130 are arranged from left to right in sequence, the slip ring seat 410 drives the first ring 200 to move rightward, and the overlap area between the first ring 200 and the bearing seat 100 and the bearing inner ring 110 increases, and the slip ring seat 410 drives the first ring 200 to move leftward, and the overlap area between the first ring 200 and the bearing seat 100 and the bearing inner ring 110 decreases. The spring 420 has a movement tendency to push the slip ring seat 410 to move rightward, and the slip ring seat 410 moves leftward, thereby compressing the spring 420.

[0043] When the temperature of the silicone oil inside the damping bearing rises, due to the high thermal expansion coefficient of the silicone oil, the silicone oil will tend to expand in volume, and the pressure generated by the volume expansion of the silicone oil will tend to push the slip ring 400 and the bearing inner ring 110 to move to both sides. The two sides of the bearing inner ring 110 are limited by the first end cover 300 and the second end cover 310, and axial movement cannot be achieved. The slip ring seat 410 of the slip ring 400 is connected to the first end cover 300 through the spring 420. Therefore, when the slip ring 400 is pushed to move to the left by the silicone oil, the spring 420 will be compressed, avoiding the overpressure phenomenon of the damping bearing due to the increase in the silicone oil temperature. At the same time, the overlap area between the first ring 200 and the bearing seat 100 and the bearing inner ring 110 is reduced, and the damping is reduced. This technical solution autonomously adjusts the volume of the second chamber 130 filled with silicone oil or the overlapping area of ​​the slip ring 400 in the second chamber 130 by changing the volume of silicone oil, thereby avoiding overpressure and achieving damping adjustment by relying on the action of the spring 420.

[0044] Reference Figure 3 and Figure 4 In this embodiment, at least one second ring 210 is fixed to the outer periphery of the bearing inner ring 110 in the second chamber 130; the first ring 200 is axially slidably arranged between the second ring 210 and the bearing seat 100, and / or the first ring 200 is axially slidably arranged between the second ring 210 and the bearing inner ring 110, and / or the first ring 200 is axially slidably arranged between two adjacent second rings 210.

[0045] There is at least one first ring 200, which can be one, two, three or more first rings 200, and at least one second ring 210, which can be one, two, three or more second rings 210. The first ring 200 and the second ring 210 are arranged in a mutually intersecting manner.

[0046] The bearing seat 100 and the second ring 210 are spaced apart, the bearing inner ring 110 and the second ring 210 are spaced apart, and when more than two second rings 210 are provided, two adjacent second rings 210 are spaced apart, and the first ring 200 can be slidably arranged in the space. The bearing seat 100, the second ring 210, the first ring 200 and the bearing inner ring 110 are spaced apart in the radial direction, and gaps are formed between them.

[0047] Reference Figure 3 and Figure 4In this embodiment, the inner ring of the bearing seat 100 is circumferentially provided with a first step portion 500 protruding inward; the outer ring of the bearing inner ring 110 is circumferentially provided with a first spacer sleeve 510 protruding outward; a channel connecting the first chamber 120 and the second chamber 130 is formed between the first step portion 500 and the first spacer sleeve 510, and the first ring 200 is slidably arranged in the channel to be inserted into the second chamber 130.

[0048] One end of the first step portion 500 is the first chamber 120, and the other end of the first step portion 500 is the second chamber 130. The first ring 200 is slidably matched with the first step portion 500, and the first spacer 510 is embedded between the slip ring 400 and the outer wall of the bearing inner ring 110. The first ring 200 is also partially slidably matched with the first spacer 510.

[0049] The first ring 200 slides with the channel to prevent the silicone oil in the second chamber 130 from entering the first chamber 120. Specifically, when there are two or more first rings 200, the first rings 200 located at the outermost and innermost sides slide with the channel, that is, slide with the first step 500 and the first spacer 510, respectively. The space between the first rings 200 is connected to the second chamber 130. At this time, the bearing seat 100, the slip ring 400 and the bearing inner ring 110 form the second chamber 130. The movement of the slip ring 400 can adjust the volume of the second chamber 130, thereby achieving pressure regulation and damping regulation.

[0050] Specifically, the outer wall of the bearing inner ring 110 is provided with a second step portion; the first spacer 510 is also step-shaped, and the first spacer 510 cooperates with the second step portion to support and limit the slip ring seat 410 and slidably cooperate with the first ring 200.

[0051] In this embodiment, the damping bearing 10 with adjustable damping force further includes a first O-ring 600 . The first O-ring 600 is disposed in the first step portion 500 to seal the gap between the first step portion 500 and the first ring 200 located at the outermost side.

[0052] Reference Figure 3 and Figure 4 In this embodiment, the damping bearing 10 with adjustable damping force also includes a second spacer sleeve 520; the second spacer sleeve 520 is arranged between the bearing seat 100 and the slip ring seat 410, and the second spacer sleeve 520 is provided with a guide groove 521 extending axially; the bearing seat 100 is provided with a limit block 530, and the limit block 530 is clamped and fixed in the guide groove 521; the slip ring seat 410 is provided with a guide block 540, and the guide block 540 is slidably arranged in the guide groove 521, and the slip ring seat 410 is used to move axially along the guide groove 521.

[0053] The limit block 530 is fixed in the guide groove 521 to achieve relative fixation of the second spacer 520 and the bearing seat 100. The guide block 540 is slidably disposed in the guide groove 521, and the slip ring seat 410 slides axially along the guide groove 521.

[0054] Specifically, Figure 4 The relative positions in the figure are introduced as follows: a first chamber 120 is formed between the left end of the first spacer 510 and the second spacer 520, and a channel is formed between the right end of the first spacer 510 and the first step portion 500.

[0055] Reference Figure 3 and Figure 4 In this embodiment, the damping bearing 10 with adjustable damping force also includes a spring seat 430; the spring seat 430 is axially movably arranged between the first end cover 300 and the slip ring seat 410, and the spring 420 is fixed between the spring seat 430 and the slip ring 400. The spring seat 430 is used to compress or release the spring 420 during the axial movement.

[0056] The spring seat 430 is used to install the spring 420. The spring seat 430 can be adjusted in the axial direction. When the spring seat 430 moves axially to compress the spring 420, when the thrust of the spring 420 increases to overcome the viscosity of the silicone oil generated by the inward movement of the slip ring 400, the slip ring seat 410 is pushed to move in the direction of the second chamber 130, and the overlap area of ​​the first ring 200 and the bearing seat 100, the bearing inner ring 110, or the second ring 210 increases, and the damping increases. The spring seat 430 moves in the opposite direction in the axial direction to release the spring 420. When the thrust of the slip ring seat 410 is not enough to overcome the pressure of the silicone oil on the slip ring 400, the slip ring seat 410 moves in the opposite direction, and the first ring 200 slowly retreats toward the outside of the second chamber 130. The overlap area of ​​the first ring 200 and the bearing seat 100, the bearing inner ring 110, or the second ring 210 decreases, and the damping decreases.

[0057] Reference Figure 3 and Figure 4 In this embodiment, the damping bearing 10 with adjustable damping force also includes an adjusting bolt 440; the adjusting bolt 440 rotatably passes through the first end cover 300 and is fixed to the spring seat 430; the adjusting bolt 440 is used to drive the spring seat 430 to reciprocate axially during rotation.

[0058] The adjusting bolt 440 is threadedly connected to the first end cover 300, and the axial movement of the spring seat 430 is adjusted by the forward and reverse rotation of the adjusting bolt 440. By tightening or loosening the adjusting bolt 440 on the first end cover 300, the damping force of the damping bearing is adjusted.

[0059] When the adjusting bolt 440 is tightened, the adjusting bolt 440 pushes the spring seat 430 to move inside the damping bearing, the spring 420 is compressed, the elastic potential energy stored inside the spring 420 increases, and the thrust acting on the slip ring 400 increases. Since the silicone oil has a large compressibility, when the thrust of the spring 420 increases to a level that can overcome the silicone oil viscosity generated by the inward movement of the slip ring 400 (or when the spring seat 430 contacts the slip ring 400), the slip ring 400 moves inward, the relative overlap area formed by the second ring 210 and the first ring 200 in the second chamber 130 increases, the viscous resistance of the silicone oil increases when the bearing inner ring 110 rotates, and the damping force of the damping bearing increases.

[0060] When the adjusting bolt 440 is loosened, the spring seat 430 moves outward with the adjusting bolt 440, the compression amount of the spring 420 decreases, the elastic potential energy stored in the spring 420 decreases, and the thrust of the spring 420 on the slip ring 400 decreases. When the thrust is not sufficient to overcome the pressure of the silicone oil on the slip ring 400, the slip ring 400 moves outward, and the relative overlap area between the second ring 210 fixed by the bearing inner ring 110 in the second chamber 130 and the first ring 200 of the slip ring 400 decreases. When the bearing inner ring 110 rotates, the viscous resistance of the silicone oil decreases, and the damping force of the damping bearing decreases.

[0061] When the adjusting bolt 440 is loosened to a certain extent, the spring seat 430 will contact the first end cover 300. Due to the presence of the fastening screw 450, the adjusting bolt 440 cannot be further loosened, thereby avoiding the falling off phenomenon caused by excessive loosening of the adjusting bolt 440.

[0062] Specifically, the adjusting bolt 440 is a hexagon socket bolt, which facilitates the adjusting bolt 440 to be screwed and adjusted from the outside of the first end cover 300 .

[0063] Reference Figure 3 and Figure 4 In this embodiment, a supporting end surface 431 is provided at one end of the spring seat 430 away from the spring 420; the supporting end surface 431 is used to prevent the adjusting bolt 440 from falling off the first end cover 300 when the spring seat 430 moves axially to abut against the first end cover 300.

[0064] When the adjusting bolt 440 is loosened to a certain extent, the abutting end surface 431 of the spring seat 430 abuts against the first end cover 300, and the adjusting bolt 440 is fixed to the spring seat 430 by the fastening screw 450. The adjusting bolt 440 cannot continue to withdraw axially outward, preventing the adjusting bolt 440 from falling off.

[0065] Reference Figure 3 and Figure 4In this embodiment, the spring seat 430 is provided with a square groove, and the end of the adjusting bolt 440 is a square block structure, which is clamped in the square groove; the damping bearing 10 with adjustable damping force also includes a fastening screw 450, which passes through the spring seat 430 and is fixed to the adjusting bolt 440.

[0066] The head of the adjusting bolt 440 is a square end face, which can be matched with the square groove inside the spring seat 430. The square block structure and the square groove match, and the relative circumferential position of the adjusting bolt 440 and the spring seat 430 is fixed. The rotation of the adjusting bolt 440 will not cause the rotation of the fastening screw 450. At the same time, when the fastening screw 450 is rotated and fixed, the adjusting bolt 440 will not rotate with it.

[0067] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 In this embodiment, a third chamber 140 is formed between the bearing inner ring 110 and the bearing seat 100 at one end close to the second end cover 310, and the first chamber 120, the second chamber 130 and the third chamber 140 are arranged in sequence along the axial direction, and the third chamber 140 is used to contain silicone oil; a plurality of fourth rings 230 are arranged on the outer periphery of the bearing inner ring 110 in the third chamber 140, and a plurality of third rings 220 are fixed on the inner side of the second end cover 310, and the plurality of third rings 220 are interspersed between the plurality of fourth rings 230.

[0068] There are two silicone oil chambers inside the damping bearing, namely the second chamber 130 and the third chamber 140. The third chamber 140 is formed by the contact between the second end cover 310 and the bearing inner ring 110, and the second chamber 130 is formed by the contact between the sliding ring 400 and the bearing inner ring 110. The volume of the second chamber 130 is fixed, the overlap area between the third ring 220 and the fourth ring 230 is fixed, and the first ring 200 of the second chamber 130 can move along the axial direction of the damping bearing to change the mutual contact area between the first ring 200 and the second ring 210 of the second chamber 130, thereby adjusting the damping.

[0069] Reference Figure 3 and Figure 4 In this embodiment, the damping bearing 10 with adjustable damping force further includes a first skeleton sealing ring 700 and a second skeleton sealing ring 710. The first skeleton sealing ring 700 is embedded between the first end cover 300 and the end of the bearing inner ring 110, and sealing is achieved through the first skeleton sealing ring 700. The second skeleton sealing ring 710 is embedded between the second end cover 310 and the end of the bearing inner ring 110, and sealing is achieved through the second skeleton sealing ring 710.

[0070] In this embodiment, the damping bearing 10 with adjustable damping force further includes a second O-ring 610, a third O-ring 620, a fourth O-ring 630, a fifth O-ring 640 and a sixth O-ring 650. The second O-ring 610 is arranged between the first end cover 300 and the bearing seat 100, and the second O-ring 610 is used to seal. The third O-ring 620 is arranged in the first skeleton sealing ring 700, and the first skeleton sealing ring 700 and the first end cover 300 are sealed by the third O-ring 620. The fourth O-ring 630 is arranged between the slip ring seat 410 and the first spacer 510, and the slip ring seat 410 and the first spacer 510 are sealed by the fourth O-ring 630. The fifth O-ring 640 is arranged between the second end cover 310 and the bearing seat 100, and the second end cover 310 and the bearing seat 100 are sealed by the fifth O-ring 640. A sixth O-ring 650 is disposed inside the second skeleton sealing ring 710 , and the second skeleton sealing ring 710 and the second end cover 310 are sealed by the sixth O-ring 650 .

[0071] An embodiment of the present invention further provides a photovoltaic tracking bracket, which includes a main beam, a main shaft and a damping bearing 10 with adjustable damping force; both ends of the main shaft are installed on the main beam through the damping bearing 10 with adjustable damping force, and the main shaft is used to install photovoltaic modules.

[0072] By providing stability to the rotation of photovoltaic modules through damping bearings, the probability of photovoltaic modules being affected by wind disasters can be reduced.

[0073] According to a damping bearing 10 with adjustable damping force provided in this embodiment, the working principle of the damping bearing 10 with adjustable damping force includes:

[0074] Silicone oil has a high thermal expansion coefficient and its volume expands greatly when the temperature rises. This will cause overpressure in a closed pressure vessel, which is prone to leakage, container damage and other dangers. The present technical solution autonomously adjusts the volume of the first chamber 120 filled with silicone oil or adjusts the overlapping area of ​​the slip ring 400 in the second chamber 130 according to the change in the volume of the silicone oil to avoid overpressure.

[0075] Silicone oil has great compressibility, and the present technical solution makes full use of this to achieve the change of the damping force of the damping bearing by adjusting the relative overlap area between the slip rings 400 without adding silicone oil from the outside of the damping bearing.

[0076] The damping bearing 10 with adjustable damping force provided in this embodiment has at least the following advantages:

[0077] When the temperature of the silicone oil inside the damping bearing rises, due to the high thermal expansion coefficient of silicone oil, the silicone oil will tend to expand in volume, and the pressure generated by the volume expansion of the silicone oil will push the slip ring 400 to move outward, compressing the spring 420, thereby avoiding the overpressure phenomenon of the damping bearing due to the increase in silicone oil temperature. At the same time, the overlap area between the first ring 200 and the bearing seat 100, as well as the bearing inner ring 110, is reduced, and the damping of the bearing inner ring 110 is reduced. The volume of the second chamber 130 filled with silicone oil or the overlap area of ​​the slip ring 400 in the second chamber 130 is autonomously adjusted by the change in the volume of silicone oil, thereby avoiding the overpressure phenomenon, and passive adjustment of the damping can be achieved by relying on the action of the spring 420.

[0078] 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 damping bearing with adjustable damping force, characterized in that: include: Bearing seat; A bearing inner ring, wherein the bearing inner ring is disposed in the bearing seat, and a first chamber and a second chamber distributed in the axial direction are formed between the bearing inner ring and the bearing seat, wherein the second chamber is used to contain silicone oil; A slip ring, the slip ring comprising a slip ring seat and at least one first ring fixed to one end of the slip ring seat, the slip ring seat being slidably disposed in the first cavity, and the first ring slidably extending into the second cavity; during the axial movement of the slip ring from the first cavity to the second cavity, the overlap area of ​​the first ring with the inner ring of the bearing and the bearing seat along the radial projection in the second cavity gradually increases; A first end cover, a second end cover and a spring, wherein the first end cover and the second end cover are respectively used to be fixed to the two ends of the bearing seat and respectively abut against the two ends of the bearing inner ring; the spring is fixed between the first end cover and the slip ring seat, and the spring has a movement tendency to push the slip ring seat to move axially from the first chamber to the second chamber.

2. The damping bearing with adjustable damping force according to claim 1, characterized in that: At least one second ring is fixed on the outer periphery of the bearing inner ring in the second chamber; the first ring is axially slidably arranged between the second ring and the bearing seat, and / or the first ring is axially slidably arranged between the second ring and the bearing inner ring, and / or the first ring is axially slidably arranged between two adjacent second rings.

3. The damping bearing with adjustable damping force according to claim 2, characterized in that: The inner ring of the bearing seat is circumferentially provided with a first step portion protruding inward; the outer ring of the inner ring of the bearing is circumferentially provided with a first spacer sleeve protruding outward in a detachable manner; a channel connecting the first chamber and the second chamber is formed between the first step portion and the first spacer sleeve, and the first ring is slidably arranged in the channel to be inserted into the second chamber.

4. The damping bearing with adjustable damping force according to claim 1, characterized in that: The damping bearing with adjustable damping force also includes a second spacer sleeve; the second spacer sleeve is arranged between the bearing seat and the slip ring seat, and the second spacer sleeve is provided with a guide groove extending axially; the bearing seat is provided with a limit block, and the limit block is clamped and fixed in the guide groove; the slip ring seat is provided with a guide block, and the guide block is slidably arranged in the guide groove, and the slip ring seat is used to move axially along the guide groove.

5. The damping bearing with adjustable damping force according to any one of claims 1 to 4, characterized in that: The damping bearing with adjustable damping force also includes a spring seat; the spring seat is movably arranged axially between the first end cover and the slip ring seat, the spring is fixed between the spring seat and the slip ring, and the spring seat is used to compress or release the spring during axial movement.

6. The damping bearing with adjustable damping force according to claim 5, characterized in that: The damping bearing with adjustable damping force also includes an adjusting bolt; the adjusting bolt rotatably passes through the first end cover and is fixed to the spring seat; the adjusting bolt is used to drive the spring seat to reciprocate axially during rotation.

7. The damping bearing with adjustable damping force according to claim 6, characterized in that: The spring seat is provided with a supporting end surface at one end away from the spring; the supporting end surface is used to prevent the adjusting bolt from falling out of the first end cover when the spring seat moves axially to abut against the first end cover.

8. The damping bearing with adjustable damping force according to claim 6, characterized in that: The spring seat is provided with a square groove, the end of the adjusting bolt is a square block structure, and the square block structure is clamped in the square groove; the damping bearing with adjustable damping force also includes a fastening screw, and the fastening screw passes through the spring seat and is fixed to the adjusting bolt.

9. The damping bearing with adjustable damping force according to any one of claims 1 to 4, characterized in that: A third chamber is formed between the inner ring of the bearing and the bearing seat at one end close to the second end cover, the first chamber, the second chamber and the third chamber are arranged in sequence along the axial direction, and the third chamber is used to contain silicone oil; A plurality of fourth rings are arranged on the outer periphery of the bearing inner ring in the third cavity, a plurality of third rings are fixed on the inner side of the second end cover, and the plurality of third rings are interspersed between the plurality of fourth rings.

10. A photovoltaic tracking bracket, characterized in that: The photovoltaic tracking bracket includes a main beam, a main shaft and a damping bearing with adjustable damping force as described in any one of claims 1 to 9; both ends of the main shaft are mounted on the main beam through the damping bearing with adjustable damping force, and the main shaft is used to install photovoltaic modules.

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