Sealing fastener for wind power cabin

Abstract

The utility model discloses a wind power cabin sealing fastener which comprises an inner lap joint edge, an outer lap joint edge, a nut, a bolt, a housing and a double-lip sealing ring, and the inner lap joint edge and the outer lap joint edge are in lap joint with each other; wherein the bolt penetrates through the inner lap joint edge and the outer lap joint edge from inside to outside, the part, penetrating out of the inner lap joint edge and the outer lap joint edge, of the bolt is in threaded fit with the nut and the housing, a double-lip sealing ring is installed on the edge of the housing, and the bolt penetrates through the inner lap joint edge and the outer lap joint edge from inside to outside and is in threaded fit with the nut. The inner lap joint edge and the outer lap joint edge can be tightly connected and prevented from loosening, the inner threaded sleeve is in threaded connection with the bolt and abuts against the nut, the stability of the fastener is enhanced, and the connecting structure of the bolt and the nut can be prevented from loosening. The double-lip sealing ring is clamped between the cover shell and the outer lap joint edge, the double-lip sealing ring is provided with two lip rings, double-layer sealing can be formed by the double-lip sealing ring and the outer lap joint edge, and dust, water and other impurities can be effectively prevented from entering the containing groove.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine generator equipment, and in particular to a wind turbine nacelle sealing fastener. Background Technology

[0002] Wind turbine nacelle sealing fasteners are key components in wind turbine generator sets used to ensure the airtightness and structural connection reliability of the nacelle. They prevent external environmental factors such as rainwater, dust, and salt spray from entering the nacelle, protect the equipment and electrical components inside the nacelle, ensure the stability of the nacelle structure, and prevent loosening caused by factors such as vibration and wind.

[0003] Chinese Patent Publication No. CN202883270U discloses a wind turbine nacelle cover overlapping edge welded nut protection assembly, including an inner overlapping edge and an outer overlapping edge that overlap each other, as well as a bolt and a nut for connecting and fixing the inner and outer overlapping edges. The nut is welded and fixed to the outer overlapping edge, and the bolt passes through the inner overlapping edge from the inside and is fastened to the nut. It also includes a cover covering the outside of the nut and bolt shank. The cover is sealed to the outer wall of the outer overlapping edge to form a sealed protective cavity. This utility model wind turbine nacelle cover overlapping edge welded nut protection assembly provides a cover outside the connector, which can effectively protect the connector from environmental corrosion, ensure its connection strength and service life, and compensate for the color difference between the connector and the wind turbine nacelle cover, thereby improving the aesthetics of the wind turbine nacelle cover.

[0004] The above-mentioned technologies effectively protect the connection structure through covers and adhesives, but the adhesive strength of the adhesive is limited, making it difficult to guarantee the stability of the connection structure and the sealing of the inside of the cover. Moreover, the construction steps are complicated. Therefore, this utility model discloses a wind turbine nacelle sealing fastener to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a wind turbine nacelle sealing fastener to solve the problems mentioned in the background art. Traditional wind turbine nacelle sealing fasteners effectively protect the connection structure through a cover and adhesive, but the adhesive strength of the adhesive is limited, making it difficult to ensure the stability of the connection structure and the sealing of the cover, and the construction steps are complicated.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems:

[0007] A wind turbine nacelle sealing fastener includes an inner overlapping edge, an outer overlapping edge, a nut, a bolt, a cover, and a double-lip sealing ring, wherein the inner overlapping edge and the outer overlapping edge overlap each other.

[0008] The bolt is designed to pass through the inner and outer lap edges from the inside out, and the portion of the bolt that passes through the inner and outer lap edges engages with the nut and the cover thread. A double-lip sealing ring is installed on the edge of the cover, and the side of the double-lip sealing ring away from the cover is in contact with the outer lap edge.

[0009] As a further embodiment of this utility model, one side of the cover is a curved structure, and the other side is provided with a receiving groove. An internal threaded sleeve is provided in the center of the receiving groove, and the internal threaded sleeve is threadedly connected to the bolt.

[0010] As a further embodiment of this utility model, the nut abuts against the internal threaded sleeve.

[0011] As a further embodiment of this utility model, the double-lip sealing ring is annular, with an enlarged ring on one side and an outer lip ring and an inner lip ring on the other side.

[0012] As a further embodiment of this utility model, an annular groove is provided on the side of the cover facing the outer overlapping edge, and an expansion ring is interference-fitted into the annular groove.

[0013] As a further embodiment of this utility model, a reinforcing cylinder is provided on one side of the inner diameter of the nut, and the reinforcing cylinder is provided to pass through the outer overlapping edge and the inner overlapping edge from the outside to the inside.

[0014] As a further embodiment of this utility model, a washer is fitted on the outer side of the bolt and between the inner lap edge and the nut.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model discloses a wind turbine nacelle sealing fastener. The bolt passes through the inner and outer lap edges from the inside to the outside and engages with the nut thread, which can ensure that the inner and outer lap edges are tightly connected and prevent loosening. In addition, the inner thread sleeve is threadedly connected to the bolt and abuts against the nut, which enhances the stability of the fastener and can prevent the connection structure between the bolt and nut from loosening.

[0017] This utility model discloses a wind turbine nacelle sealing fastener, which includes a double-lip sealing ring sandwiched between the cover and the outer overlapping edge. The double-lip sealing ring has two lips, which can form a double-layer seal with the outer overlapping edge, effectively preventing dust, moisture and other impurities from entering the receiving groove, ensuring the service life of the fastener and ensuring that the fastener remains stable during long-term use. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a structural cross-sectional view of a wind turbine nacelle sealing fastener according to the present invention;

[0020] Figure 2 This utility model provides a sealing fastener for a wind turbine nacelle. Figure 1 Enlarged view of the structure at point A in the image;

[0021] Figure 3 This is a three-dimensional structural diagram of a double-lip sealing ring in a wind turbine nacelle sealing fastener according to the present invention.

[0022] Figure 4 This is a structural diagram of the cover in a wind turbine nacelle sealing fastener of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Inner lap joint; 2. Outer lap joint; 3. Nut; 4. Bolt; 5. Cover; 6. Double lip seal; 31. Reinforcing sleeve; 41. Washer; 51. Receiving groove; 52. Internal threaded sleeve; 53. Annular groove; 61. Expansion ring; 62. Outer lip ring; 63. Inner lip ring. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments.

[0026] Please see Figure 1-4 This utility model provides a wind turbine nacelle sealing fastener, including an inner overlapping edge 1, an outer overlapping edge 2, a nut 3, a bolt 4, a cover 5, and a double-lip sealing ring 6. The inner overlapping edge 1 and the outer overlapping edge 2 overlap each other, and the contact area between the inner overlapping edge 1 and the outer overlapping edge 2 is provided with sealant or sealing element to ensure the airtightness of the wind turbine nacelle.

[0027] Furthermore, the bolt 4 is provided to pass through the inner lap edge 1 and the outer lap edge 2 from the inside to the outside, and a washer 41 is provided on the outside of the bolt 4 and between the inner lap edge 1 and the nut;

[0028] Specifically, washer 41 can increase the contact area between bolt 4 and inner lap edge 1, reduce pressure, avoid damage to inner lap edge 1 caused by excessive local pressure, extend the service life of fasteners, prevent loosening between bolt 4 and nut 3 due to vibration, wind and other factors, and ensure the stability of fasteners.

[0029] Furthermore, a reinforcing cylinder 31 is provided on one side of the inner diameter of the nut 3, and the reinforcing cylinder 31 is provided to pass through the outer overlapping edge 2 and the inner overlapping edge 1 from the outside to the inside;

[0030] Specifically, mounting holes are provided on both the outer overlapping edge 2 and the inner overlapping edge 1. After inserting the reinforcing cylinder 31 into the two mutually aligned mounting holes, misalignment of the outer overlapping edge 2 and the inner overlapping edge 1 can be prevented, which facilitates subsequent assembly steps. On the other hand, the reinforcing cylinder 31 can evenly distribute stress on the outer overlapping edge 2 and the inner overlapping edge 1, avoiding deformation or breakage caused by local stress concentration.

[0031] Furthermore, the portion of the bolt 4 that extends through the inner lap edge 1 and the outer lap edge 2 is threadedly engaged with the nut 3 and the cover 5. One side of the cover 5 has a curved surface structure, and the other side is provided with a receiving groove 51. An internal threaded sleeve 52 is provided in the center of the receiving groove 51, and the internal threaded sleeve 52 is threadedly connected to the bolt 4.

[0032] Specifically, one side of the curved structure of the cover 5 is adapted to the external structure of the wind turbine nacelle to meet aerodynamic or other design requirements, while the side with the receiving groove 51 faces the inner overlapping edge 1 and the outer overlapping edge 2 to accommodate bolts 4, nuts 3 and related connecting parts.

[0033] Furthermore, the nut 3 abuts against the internal threaded sleeve 52;

[0034] Specifically, after the bolt 4 passes through the inner lap edge 1 and the outer lap edge 2 in sequence, the nut 3 and the inner threaded sleeve 52 abut against each other and work together on the bolt 4 to form a stable connection structure, reducing the gap between the inner lap edge 1 and the outer lap edge 2 caused by vibration or fatigue of the threaded connection structure.

[0035] Furthermore, a double-lip sealing ring 6 is installed on the edge of the cover 5. The side of the double-lip sealing ring 6 away from the cover 5 is in contact with the outer overlapping edge 2. The double-lip sealing ring 6 is annular, and an expansion ring 61 is provided on one side, and an outer lip ring 62 and an inner lip ring 63 are provided on the other side.

[0036] Specifically, the double-lip sealing ring 6 is made of silicone or rubber. When the cover 5 is installed on the outer overlapping edge 2, the double-lip sealing ring 6 fits tightly with the outer overlapping edge 2 through the outer lip ring 62 and the inner lip ring 63, forming a double seal. This effectively prevents dust, moisture and other impurities from entering the receiving groove 51, thereby protecting the internal connecting parts such as bolts 4 and nuts 3 from corrosion and extending the service life of the fasteners. It is worth noting that the outer lip ring 62 and the inner lip ring 63 together form a "V" shaped structure. The closer the cover 5 is to the outer overlapping edge 2, the greater the deformation of the "V" shaped structure, the greater the reaction force exerted by the double-lip sealing ring 6 on the outer overlapping edge 2, and the better the sealing effect.

[0037] Furthermore, an annular groove 53 is provided on the side of the cover 5 facing the outer overlapping edge 2, and an expansion ring 61 is interference-fitted into the annular groove 53;

[0038] Specifically, the expansion ring 61 has a circular cross-section. The circular cross-section of the expansion ring 61 has relatively uniform elastic properties in all directions, which can be easily embedded into the annular groove 53. The expansion ring 61 is embedded in the annular groove 53 of the cover 5 through interference fit, and generates elastic deformation, thereby providing a certain pre-tightening force, so that the double lip sealing ring 6 and the outer overlapping edge 2 fit tightly, enhancing the sealing effect. After the expansion ring 61 is installed, it can effectively prevent dust, moisture, salt spray and other impurities from entering the receiving groove 51, thereby protecting the internal bolts 4, nuts 3 and other connecting parts from corrosion and extending the service life of the fasteners.

[0039] Working principle:

[0040] In use, first install the inner overlapping edge 1 and the outer overlapping edge 2 into the holes. Then, insert the reinforcing cylinder 31 into the holes of the inner overlapping edge 1 and the outer overlapping edge 2 from the outside to the inside. Next, put the washer 41 on the outside of the bolt 4, pass the bolt 4 from the inside to the outside, and tighten the nut 3. This will fasten the inner overlapping edge 1 and the outer overlapping edge 2 into one piece. Then, rotate the cover 5 to engage the inner threaded sleeve 52 with the bolt 4. The outer lip 62 and the inner lip 63 of the double-lip sealing ring 6 will abut against the outer overlapping edge 2 to form a double-layer sealing structure. Continue to rotate the cover 5 until the inner threaded sleeve 52 abuts against the nut 3. This will prevent the connection structure between the bolt 4 and the nut 3 from loosening.

Claims

1. A wind turbine nacelle sealing fastener, characterized in that, It includes an inner overlapping edge (1), an outer overlapping edge (2), a nut (3), a bolt (4), a cover (5), and a double-lip sealing ring (6), wherein the inner overlapping edge (1) and the outer overlapping edge (2) overlap each other; The bolt (4) is installed from the inside to the outside through the inner overlapping edge (1) and the outer overlapping edge (2), and the part of the bolt (4) that passes through the inner overlapping edge (1) and the outer overlapping edge (2) is threadedly engaged with the nut (3) and the cover (5). A double-lip sealing ring (6) is installed on the edge of the cover (5), and the side of the double-lip sealing ring (6) away from the cover (5) is in contact with the outer overlapping edge (2).

2. The wind turbine nacelle sealing fastener according to claim 1, characterized in that: One side of the cover (5) is a curved structure, and the other side is provided with a receiving groove (51). An internal thread sleeve (52) is provided in the center of the receiving groove (51), and the internal thread sleeve (52) is threadedly connected to the bolt (4).

3. A wind turbine nacelle sealing fastener according to claim 2, characterized in that: The nut (3) abuts against the internal threaded sleeve (52).

4. A wind turbine nacelle sealing fastener according to claim 1, characterized in that: The double-lip sealing ring (6) is annular, with an enlarged ring (61) on one side and an outer lip ring (62) and an inner lip ring (63) on the other side.

5. A wind turbine nacelle sealing fastener according to claim 4, characterized in that: The cover (5) has an annular groove (53) on the side facing the outer overlapping edge (2), and an expansion ring (61) is inserted into the annular groove (53).

6. A wind turbine nacelle sealing fastener according to claim 1, characterized in that: A reinforcing sleeve (31) is provided on one side of the inner diameter of the nut (3), and the reinforcing sleeve (31) is provided to pass through the outer overlapping edge (2) and the inner overlapping edge (1) from the outside to the inside.

7. A wind turbine nacelle sealing fastener according to claim 1, characterized in that: A washer (41) is fitted on the outside of the bolt (4) and between the inner lap edge (1) and the nut.

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