Sealing structure for wind damper of photovoltaic module

Abstract

The utility model discloses a kind of sealing structure for photovoltaic module wind damper, belong to rotary damper technical field, the sealing structure includes: damper main body, the damper main body has the accommodation cavity of fillable damping fluid and at least one end is equipped with through-hole;Damping rotor, including being set in the rotor of the accommodation cavity and the shaft portion connected to the rotor, the shaft portion is rotatably worn in the inside of the through-hole to drive the rotor rotates in the accommodation cavity;Oil seal portion, between the damper main body and the shaft portion;The oil seal portion is configured to prevent damping fluid in the accommodation cavity from flowing out through the through-hole;And for preventing external dust from entering dust seal portion, the dust seal portion is set between the damper main body and the shaft portion and located on the side of the oil seal portion away from the accommodation cavity.The sealing structure of the utility model can improve the service life and reliability of damper under severe sand and dust weather.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, specifically to a sealing structure for a wind damper for photovoltaic modules. Background Technology

[0002] Photovoltaic power generation systems are typically built in open, unobstructed areas to ensure sufficient sunlight. However, these areas are often accompanied by severe weather conditions such as strong winds and sandstorms. Strong wind loads exert enormous static and dynamic forces on photovoltaic modules, which can lead to module tearing, support deformation, or even overall structural failure in severe cases. To ensure the stability and safety of photovoltaic arrays, wind dampers (also known as wind absorbers or wind-resistant vibration reduction devices) are widely used in photovoltaic support systems. Through their damping effect, they dissipate wind energy, effectively suppress the swaying of photovoltaic modules, and reduce the risk of wind-induced damage.

[0003] In related technologies, wind dampers employ a single oil seal structure to prevent leakage of the internal damping fluid, ensuring that the damper has a stable and durable damping force. However, when such dampers are applied to actual photovoltaic power plants, especially in windy and sandy deserts, Gobi, or coastal areas, problems such as device jamming and oil seal failure frequently occur.

[0004] Therefore, existing wind dampers that rely on a single oil seal are insufficient to meet the practical requirements for long-term, stable, and maintenance-free operation in harsh environments such as sandstorms and salt spray. There is an urgent need in this field for a novel sealing structure that can simultaneously and effectively address both dust prevention and oil sealing, thereby significantly improving the service life and reliability of photovoltaic wind dampers under harsh conditions.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] Purpose of this utility model: The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a sealing structure for a wind damper for photovoltaic modules, which helps to improve the service life and reliability of the damper under severe sandstorm weather.

[0007] To address the aforementioned technical problems, this utility model discloses a sealing structure for a wind damper in a photovoltaic module, comprising:

[0008] The damper body has a receiving cavity that can be filled with damping fluid and a through hole at at least one end;

[0009] The damping rotor includes a rotor disposed in the accommodating cavity and a shaft connected to the rotor, the shaft being rotatably disposed inside the through hole to drive the rotor to rotate within the accommodating cavity;

[0010] An oil seal is disposed between the damper body and the shaft portion; the oil seal is configured to prevent the damping fluid in the accommodating cavity from flowing out through the through hole.

[0011] And a dust seal portion for preventing external dust from entering, the dust seal portion being disposed between the damper body and the shaft portion and located on the side of the oil seal portion away from the receiving cavity, and being in contact with the external environment first.

[0012] Optionally, the dust seal portion and the oil seal portion are provided by independent sealing parts. The sealing part for the dust seal portion is a single-lip seal ring or a double-lip seal ring with main and secondary lips. The sealing part for the oil seal portion is an O-ring, a single-lip seal ring, or a double-lip seal ring with main and secondary lips.

[0013] Optionally, the dust seal portion and the oil seal portion are provided by the same sealing component, which is a double-lip seal ring with primary and secondary lips.

[0014] Specifically, the dust-sealing part is the secondary lip of the double-lip seal ring, which is in contact with the external environment first; the oil-sealing part is the main lip of the same double-lip seal ring, which is close to the damping fluid.

[0015] Furthermore, a spring coil is also installed on the main lip.

[0016] In some embodiments, the shaft portion includes a journal section, and the through hole includes a cylindrical hole adapted to the journal section and a stepped groove located axially outside the cylindrical hole for embedding the double-lip seal ring. The shaft portion is rotatably inserted through the through hole by the journal section being sleeved in the cylindrical hole with clearance fit.

[0017] The sealing structure also includes a retaining ring, which is fixedly connected to the damper body and presses the oil seal portion into the stepped groove.

[0018] In other embodiments, the sealing structure further includes a bearing mounted on the shaft portion, the shaft portion being rotatably disposed within a through-hole of the damper body via the bearing;

[0019] The damper body has a limiting step inside the through hole, which allows the sealing parts of the dust seal and the bearing to be axially limited together.

[0020] In one embodiment of the damper body, the damper body includes a cylinder and an end cap, the cylinder having at least one open end for inserting the damping rotor into the receiving cavity; the end cap is statically sealed at the open end of the cylinder.

[0021] Specifically, the end cap is fitted inside the cylinder body and is fixedly connected to the cylinder body by an axial fastener, the axial fastener being parallel to the axial direction of the shaft; a radial sealing ring is provided at the mating surface between the end cap and the cylinder body.

[0022] Beneficial effects:

[0023] 1. The sealing structure for a photovoltaic module wind damper provided by this utility model achieves dual sealing protection by setting up an oil seal and a dust seal. The oil seal is mainly used to seal the damping fluid in the accommodating cavity to prevent leakage under high pressure conditions; the dust seal is used to block the intrusion of external pollutants such as sand and rainwater, especially to keep the interior clean in harsh environments. The two work together to effectively maintain the stability of the internal damping fluid and the sealing pressure, and ensure that the entire damper can still operate reliably in harsh weather conditions such as wind, sand, rain and snow, thereby ensuring that large damping energy absorbers such as photovoltaic module wind dampers have long-term and stable working performance.

[0024] 2. The oil seal and dust seal can be provided by the same seal or by different seals. Attached Figure Description

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0026] Figure 1 An application scenario diagram for a wind damper for photovoltaic modules provided in the first embodiment of this utility model;

[0027] Figure 2 Exploded view of a wind damper for photovoltaic modules provided for the first embodiment of this utility model;

[0028] Figure 3 This is a main sectional view of a wind damper for photovoltaic modules provided in the first embodiment of the present invention;

[0029] Figure 4 for Figure 3 A magnified view of the circled area in the main sectional view of the wind damper for photovoltaic modules shown.

[0030] Figure 5 A schematic diagram of the assembly structure of the double-lip sealing ring, end cap, and shaft provided in the second embodiment of this utility model;

[0031] Figure 6 A main sectional view of a wind damper for photovoltaic modules provided in the third embodiment of this utility model;

[0032] Figure 7 This is a schematic diagram of the assembly structure of the main lip and the main lip of the spring ring provided in the fourth embodiment of this utility model.

[0033] The accompanying labeling is as follows:

[0034] 100. Photovoltaic module wind damper; 110. Damper body; 111. Receiving cavity; 112. Through hole; 1121. Cylindrical hole; 1122. Stepped groove; 113. Cylinder body; 114. End cap; 116. Retaining ring; 115. Open end; 120. Damping rotor; 121. Rotor body; 122. Shaft; 123. Hole; 124. Limiting step; 130. Oil seal part; 140. Dust seal part; 150. Spring ring; 160. Axial fastener; 170. Radial sealing ring; 181. Single lip sealing ring; 182. O-ring seal; 183. Double lip sealing ring; 1832. Main lip; 1831. Secondary lip; 190. Bearing; 300. Photovoltaic support tube; 400. Photovoltaic panel. Detailed Implementation

[0035] In related technologies, wind dampers rely on a single oil seal, which is difficult to meet the actual needs of long-term, stable, and maintenance-free operation in harsh environments such as sandstorms and salt spray.

[0036] See Figures 1 to 3 This utility model provides a sealing structure for a wind damper for photovoltaic modules, which helps to improve the service life and reliability of the wind damper 100 for photovoltaic modules under harsh working conditions.

[0037] See Figure 2 and Figure 3 The sealing structure for a wind damper for photovoltaic modules provided by this utility model includes: a damper body 110, the damper body 110 having a accommodating cavity 111 for filling with damping fluid and a through hole 112 at at least one end; a damping rotor 120, including a rotor body 121 disposed in the accommodating cavity 111 and a shaft portion 122 connected to the rotor body 121, the shaft portion 122 being rotatably disposed inside the through hole 112 to drive the rotor body 121 to rotate within the accommodating cavity 111; an oil seal portion 130 disposed between the damper body 110 and the shaft portion 122; the oil seal portion 130 being configured to prevent the damping fluid in the accommodating cavity 111 from flowing out through the through hole 112; and a dust seal portion 140 for preventing external dust from entering, the dust seal portion 140 being disposed between the damper body 110 and the shaft portion 122 and located on the side of the oil seal portion 130 away from the accommodating cavity 111, and being in contact with the external environment first.

[0038] See Figure 1 In use, the damper body 110 of the photovoltaic module wind damper 100 is fixedly connected to the column of the photovoltaic support 200. The shaft 122 of the damping rotor 120 is fixedly connected to the photovoltaic panel 400. For example, the damping rotor 120 has a hole 123 that passes through the shaft 122 and the rotor body 121. The photovoltaic support tube 300 is fixedly sleeved in the hole 123, and the photovoltaic panel 400 is fixedly connected to the other end of the photovoltaic support tube 300.

[0039] The dust seal portion 140 and the oil seal portion 130 can be provided by independent sealing parts. The sealing part for the dust seal portion 140 is a single-lip seal ring 181 or a double-lip seal ring 183 with main and secondary lips 1831. The sealing part for the oil seal portion 130 is an O-ring seal 182, a single-lip seal ring 181 or a double-lip seal ring 183 with main and secondary lips 1831.

[0040] The dust seal portion 140 and the oil seal portion 130 can also be provided by the same sealing element, either connected as a single unit or formed integrally. The sealing element is a double-lip seal ring 183 with main and secondary lips 1831. Specifically, the dust seal portion 140 is the secondary lip 1831 of the double-lip seal ring 183, which is in contact with the external environment first; the oil seal portion 130 is the main lip 1832 of the same double-lip seal ring 183, which is close to the damping fluid.

[0041] Furthermore, to enhance durability, a spring ring 150 can also be installed on the main lip 1832.

[0042] The following describes two embodiments in which the shaft 122 is rotatably inserted through the through hole 112.

[0043] In one embodiment, the shaft portion 122 includes a journal section 1221, and the through hole 112 includes a cylindrical hole 1121 adapted to the journal section 1221. By fitting the journal section 1221 into the cylindrical hole 1121 with a clearance fit, the shaft portion 122 can be rotatably inserted into the through hole 112.

[0044] In another embodiment, the sealing structure further includes a bearing 190, and the shaft portion 122 is rotatably disposed within the through hole 112 of the damper body 110 via the bearing 190.

[0045] The specific structure of the damper body is described below.

[0046] The damper body 110 includes a cylinder 113 and an end cap 114. The cylinder 113 has at least one open end 115 for inserting the damping rotor 120 into the receiving cavity 111. The end cap 114 is statically sealed at the open end 115 of the cylinder 113.

[0047] Example 1

[0048] See Figures 1 to 3 This embodiment provides a sealing structure for a wind damper for photovoltaic modules, including: a damper body 110, the damper body 110 having a accommodating cavity 111 that can be filled with damping fluid and having through holes 112 at its opposite ends;

[0049] The damping rotor 120 includes a rotor body 121 disposed in a accommodating cavity 111. The rotor body 121 has shaft portions 122 connected to its two axially opposite ends. Each shaft portion 122 is rotatably disposed in a corresponding through hole 112 via a corresponding bearing 190 to drive the rotor body 121 to rotate within the accommodating cavity 111.

[0050] An oil seal portion 130 is disposed between the damper body 110 and the shaft portion 122; the oil seal portion 130 is configured to prevent the damping fluid in the accommodating cavity 111 from flowing out through the through hole 112.

[0051] And a dust seal portion 140, which is disposed between the damper body 110 and the shaft portion 122 and located on the side of the oil seal portion 130 away from the receiving cavity 111.

[0052] Specifically, such as Figure 4 As shown, in this embodiment, the dust seal portion 140 and the oil seal portion 130 are provided by independent sealing parts. The sealing part for providing the dust seal portion 140 is a single-lip seal ring 181, and the sealing part for providing the oil seal portion 130 is an O-ring seal ring 182.

[0053] It should be understood that the sealing component used to provide the oil seal portion 130 in this embodiment may also be a double-lip sealing ring 183 with main and secondary lips 1831.

[0054] See Figure 3 The oil seal portion 130 is located on the side of the bearing 190 near the receiving cavity 111, and the dust seal portion 140 is located on the side of the oil seal portion 130 away from the receiving cavity 111.

[0055] In this embodiment, see Figure 2 and Figure 3 The damper body 110 includes a cylinder 113 and an end cap 114. The cylinder 113 has an open end 115 for inserting the damping rotor 120 into the receiving cavity 111. The end cap 114 is statically sealed at the open end 115 of the cylinder 113. One of the two through holes 112 is opened on the end cap 114, and the other is opened on the cylinder 113.

[0056] In this embodiment, a limiting step 124 is provided in the through hole 112 of the damper body 110, and the dust-sealed part 140 is axially limited by the limiting step 124.

[0057] The following describes the specific method by which the end cap 114 is statically sealed at the open end 115 of the cylinder body 113 in this embodiment. See [link to documentation]. Figure 3 The end cap 114 is fitted inside the cylinder body 113 and is fixedly connected to the cylinder body 113 by an axial fastener 160, which is parallel to the axial direction of the shaft portion 122. A radial sealing ring 170 is provided at the mating surface between the end cap 114 and the cylinder body 113.

[0058] Example 2

[0059] Combination Figure 5 As shown, unlike Embodiment 1, in Embodiment 2, the dust seal portion 140 and the oil seal portion 130 are provided by the same sealing component, which is a double-lip seal ring 183 with main and secondary lips. The dust seal portion 140 is the secondary lip 1831 of the double-lip seal ring 183, which is in contact with the external environment first; the oil seal portion 130 is the main lip 1832 of the same double-lip seal ring 183, which is close to the damping fluid. The main lip 1832 has a V-shaped structure.

[0060] The other parts not mentioned are the same as in Example 1.

[0061] Example 3

[0062] Compared to Embodiment 2, Embodiment 3 differs in that the bearing 190 is omitted in Embodiment 3, and rotational engagement is achieved through the structure of the shaft and the through hole itself.

[0063] In this embodiment, combined with Figure 6 As shown, the shaft portion 122 includes a journal section 1221, and the through hole 112 includes a cylindrical hole 1121 adapted to the journal section 1221 and a stepped groove 1122 located axially outside the cylindrical hole 1121 for embedding a double-lip seal ring 183. The shaft portion 122 is rotatably inserted into the through hole 112 by fitting the journal section 1221 within the cylindrical hole 1121 with a clearance fit. The sealing structure also includes a retaining ring 116, which is fixedly connected to the damper body 110 and presses the oil seal portion 130 into the stepped groove 1122. The retaining ring 116 can be fixed by welding or by tightening with threaded fasteners.

[0064] The following describes the specific method by which the end cap 114 is statically sealed at the open end 115 of the cylinder body 113 in this embodiment. (Combined with...) Figure 6 As shown, the end cap 114 is fitted inside the cylinder body 113 and is fixedly connected to the cylinder body 113 by welding methods such as laser welding. A radial sealing ring 170 is provided at the mating surface between the end cap 114 and the cylinder body 113.

[0065] The other parts not mentioned are the same as in Example 2.

[0066] Example 4

[0067] Based on any of the above embodiments, combined with Figure 7 As shown, a spring ring 150 is also installed on the inner side of the main lip 1832 of the double-lip sealing ring 183 to improve durability and sealing performance.

[0068] This utility model provides a concept and method for a sealing structure of a wind damper for photovoltaic modules. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A sealing structure for a wind damper in a photovoltaic module, characterized in that, include: The damper body (110) has a receiving cavity (111) that can be filled with damping fluid and a through hole (112) at at least one end. The damping rotor (120) includes a rotor body (121) disposed in the accommodating cavity (111) and a shaft (122) connected to the rotor body (121). The shaft (122) is rotatably disposed inside the through hole (112) to drive the rotor body (121) to rotate within the accommodating cavity (111). An oil seal portion (130) is disposed between the damper body (110) and the shaft portion (122); the oil seal portion (130) is configured to prevent the damping fluid in the accommodating cavity (111) from flowing out through the through hole (112); And a dust seal portion (140) for preventing external dust from entering, the dust seal portion (140) being disposed between the damper body (110) and the shaft portion (122) and located on the side of the oil seal portion (130) away from the receiving cavity (111).

2. The sealing structure for a wind damper of a photovoltaic module according to claim 1, characterized in that, The dust seal portion (140) and the oil seal portion (130) are provided by independent sealing parts. The sealing part for the dust seal portion (140) is a single-lip seal ring (181) or a double-lip seal ring (183) with a main lip and a secondary lip (1831). The sealing part for the oil seal portion (130) is an O-ring seal (182), a single-lip seal ring (181), or a double-lip seal ring (183) with a main lip and a secondary lip (1831).

3. The sealing structure for a wind damper of a photovoltaic module according to claim 2, characterized in that, The dust seal portion (140) and the oil seal portion (130) are provided by the same sealing element, which is a double-lip seal ring (183) having a main lip and a secondary lip (1831).

4. The sealing structure for a wind damper for photovoltaic modules according to claim 2 or 3, characterized in that, The dust seal portion (140) is the secondary lip (1831) of the double-lip seal ring (183), which is in contact with the external environment first; the oil seal portion (130) is the main lip (1832) of the same double-lip seal ring (183), which is close to the damping fluid.

5. The sealing structure for a wind damper of a photovoltaic module according to claim 4, characterized in that, A spring ring (150) is also installed on the main lip (1832).

6. The sealing structure for a wind damper of a photovoltaic module according to claim 3, characterized in that, The shaft portion (122) includes a journal section (1221), and the through hole (112) includes a cylindrical hole (1121) adapted to the journal section (1221) and a stepped groove (1122) located on the axially outer side of the cylindrical hole (1121) for embedding the double-lip seal ring (183). By fitting the journal section (1221) inside the cylindrical hole (1121) with a clearance fit, the shaft portion (122) can be rotatably inserted into the through hole (112). It also includes a retaining ring (116), which is fixedly connected to the damper body (110) and presses the oil seal portion (130) into the stepped groove (1122).

7. The sealing structure for a wind damper of a photovoltaic module according to claim 2, characterized in that, It also includes a bearing (190), which is mounted on the shaft (122), and the shaft (122) is rotatably disposed in the through hole (112) of the damper body (110) through the bearing (190); The damper body (110) has a limiting step (124) in the through hole (112) so that the sealing part of the dust sealing part (140) and the bearing (190) are axially limited by the limiting step (124).

8. The sealing structure for a wind damper of a photovoltaic module according to claim 1, characterized in that, The damper body (110) includes a cylinder (113) and an end cap (114). The cylinder (113) has at least one open end (115) for placing the damping rotor (120) into the receiving cavity (111). The end cap (114) is statically sealed at the open end (115) of the cylinder (113).

9. The sealing structure for a wind damper of a photovoltaic module according to claim 8, characterized in that, The end cap (114) is fitted inside the cylinder body (113) and is fixedly connected to the cylinder body (113) by an axial fastener (160), the axial fastener (160) being parallel to the axial direction of the shaft (122); a radial sealing ring (170) is provided at the mating surface between the end cap (114) and the cylinder body (113).

10. The sealing structure for a wind damper of a photovoltaic module according to claim 8, characterized in that, The end cap (114) is fitted inside the cylinder body (113) and welded to the cylinder body (113); a radial sealing ring (170) is provided at the mating surface of the end cap (114) and the cylinder body (113).

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