Cabin shell of wind driven generator

Abstract

The utility model relates to the technical field of wind driven generator equipment, and aims to solve the technical problems that the cost is high, the mounting and the dismounting are inconvenient, and the load of a tower and a foundation is large. In order to solve the technical problem, the utility model provides the cabin shell of the wind driven generator. The shaping framework comprises a plurality of annular keels and a plurality of strip-shaped keels; the annular keels are arranged at intervals in the axial direction of the cabin shell; every two adjacent annular keels are connected through a plurality of strip-shaped keels; the film layer is coated outside the shaping frame; the film layer comprises a plurality of tensile films which are in lap joint in a heat sealing manner; and the tensile membrane is connected with the annular keel and the strip-shaped keel. According to the utility model, the weight of the cabin shell is greatly reduced, and the load of a tower drum foundation is reduced; the transportation cost is reduced; the preparation cost is reduced; and installation on the tower drum is more convenient and quicker.

Description

Technical Field

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

[0002] Wind power generation is a method of generating electricity by converting the kinetic energy of wind into electrical energy. It is a clean and pollution-free renewable energy source. Utilizing wind power is very environmentally friendly, and wind energy reserves are enormous. Therefore, wind power generation is receiving increasing attention from countries around the world. Wind turbine generators absorb wind energy through wind turbine blades, and use a transmission system to transfer the absorbed wind energy to the generator shaft, where the generator converts mechanical energy into electrical energy.

[0003] A wind turbine consists of a tower, nacelle, rotor blades, and shaft. The wind turbine rotor, including the blades and shaft, is located at the left end of the nacelle. The gearbox and generator are housed inside the nacelle. Existing nacelle shells are made of metal frames and fiberglass, which present the following problems:

[0004] 1. High cost: The manufacturing process is relatively complex, resulting in high manufacturing costs for the nacelle shell. It needs to be manufactured as a finished product in the factory and then transported to the installation site by transport vehicles. Due to the large size and length of the nacelle shell, it is not convenient to transport, so the transportation cost is high.

[0005] 2. Inconvenient to install and disassemble: It is manufactured as a finished product in the factory and then transported to the construction site. It needs to be hoisted and installed as a whole at the construction site (fiberglass is heavy), so installation and disassembly are inconvenient.

[0006] 3. High load on tower and foundation: Fiberglass is heavy, so it puts a high load on the tower and foundation. Utility Model Content

[0007] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model provides a wind turbine nacelle shell, comprising:

[0009] The shaped frame includes multiple annular keels and multiple strip keels; the annular keels are spaced apart along the axial direction of the cabin shell; adjacent annular keels are connected by multiple strip keels.

[0010] The membrane layer covers the outside of the shaped frame; the membrane layer includes multiple tensile membranes, which are overlapped by heat sealing; the tensile membrane is connected to the annular keel and the strip keel.

[0011] In one embodiment of this utility model, this application further includes a connecting component for connecting the tensile membrane and the shaping frame; the connecting component includes multiple pressure strips and multiple self-tapping screws; the pressure strips are disposed on the outer wall of the tensile membrane, and the pressure strips are connected to the shaping frame by multiple self-tapping screws.

[0012] In one embodiment of this utility model, the pressure strip is made of aluminum.

[0013] In one embodiment of the present invention, the connecting component further includes a protective pad disposed between the tension membrane and the shaping frame.

[0014] In one embodiment of this utility model, a washer is fitted onto the self-tapping screw, and the washer is located between the head of the self-tapping screw and the pressure strip.

[0015] In one embodiment of this utility model, the shaping frame further includes an inclined reinforcing keel; the reinforcing keel is connected between two adjacent annular keels.

[0016] In one embodiment of this invention, the ring-shaped keel and the strip-shaped keel are detachably connected, facilitating rapid on-site assembly.

[0017] In one embodiment of this utility model, the annular keel and the strip keel are detachably connected by a flange and multiple bolts; the end of the strip keel is provided with a flange, the flange is provided with multiple first connection holes, and the annular keel is provided with multiple second connection holes; the first connection holes and the second connection holes are connected by bolts.

[0018] In one embodiment of this utility model, the bolt is a high-strength bolt.

[0019] In one embodiment of this utility model, the outer wall at the connection position between the annular keel and the strip keel is polished smooth.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] The wind turbine nacelle shell of this utility model comprises a shaped frame formed by connecting annular and strip keels to shape the outer form of the nacelle shell and provide support for the membrane layer, ensuring the strength of the nacelle shell. A membrane layer, composed of multiple overlapping tensile membranes, is then wrapped around the shaped frame. The tensile membrane is easy to cut, shape, and paint, making it suitable for irregularly shaped nacelle shells. Furthermore, the tensile membrane is very lightweight, significantly reducing the weight of the nacelle shell and lessening the load on the tower foundation. This application allows for the prefabrication of the annular and strip keels and the tensile membrane in the factory, followed by on-site assembly, facilitating transportation and reducing transportation costs. The tensile membrane technology is mature and not complex, resulting in low cost and thus reducing the manufacturing cost of this application. Because the tensile membrane is very lightweight, the weight of the nacelle shell is significantly reduced, making its installation on the tower more convenient and faster. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a wind turbine nacelle shell in a preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of the plastic frame in the nacelle shell of a wind turbine generator;

[0025] Figure 3 yes Figure 1 A schematic diagram showing the connection between the plastic frame and the tensile membrane in the nacelle shell of a wind turbine generator;

[0026] Figure 4 yes Figure 1 A schematic diagram showing the connection between the annular keel and the strip keel in the nacelle shell of a wind turbine generator;

[0027] Explanation of reference numerals in the accompanying drawings: 100, molded frame; 110, ring keel; 120, strip keel; 130, reinforcing keel; 140, flange; 150, bolt;

[0028] 200. Membrane layer; 210. Tensioned membrane;

[0029] 300. Connecting component; 310. Pressure strip; 320. Self-tapping screw; 330. Protective pad; 340. Washer. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] Reference Figures 1-4 As shown, this utility model embodiment provides a wind turbine nacelle shell, comprising:

[0032] The shaped frame 100 includes multiple annular keels 110 and multiple strip keels 120; the annular keels 110 are spaced apart along the axial direction of the cabin shell; adjacent annular keels 110 are connected by multiple strip keels 120.

[0033] The membrane layer 200 covers the outside of the shaping frame 100; the membrane layer 200 includes multiple tensile membranes 210, which are overlapped by heat sealing; the tensile membranes 210 are connected to the annular keel 110 and the strip keel 120.

[0034] Specifically, in this embodiment, a shaping frame 100 is formed by connecting annular keels 110 and strip keels 120 to shape the outer shape of the nacelle shell and provide support for the membrane layer 200, ensuring the strength of the nacelle shell. Then, a membrane layer 200 is wrapped around the shaping frame 100. The membrane layer 200 is composed of multiple overlapping tensile membranes 210. The tensile membrane 210 is easy to cut, shape, and paint, making it suitable for irregularly shaped nacelle shells. Furthermore, the tensile membrane 210 is very light, greatly reducing the weight of the nacelle shell and lessening the load on the tower foundation. This application allows for the prefabrication of the annular keel 110, strip keels 120, and tensile membrane 210 in a factory, followed by on-site assembly, facilitating transportation and reducing transportation costs. The tensile membrane 210 has a mature and simple manufacturing process, resulting in low cost and reducing the overall manufacturing cost of this application. Because the tensile membrane 210 is very light, the weight of the nacelle shell is significantly reduced, making its installation on the tower more convenient and faster.

[0035] Furthermore, this application also includes a connecting assembly 300 for connecting the tensile membrane 210 and the shaping frame 100; the connecting assembly 300 includes a plurality of pressure strips 310 and a plurality of self-tapping screws 320; the pressure strips 310 are disposed on the outer wall of the tensile membrane 210, and the pressure strips 310 are connected to the shaping frame 100 by the plurality of self-tapping screws 320.

[0036] Furthermore, the pressure strip 310 is made of aluminum. Specifically, the aluminum pressure strip 310 is rust-free and has good corrosion resistance, making it suitable for outdoor applications of wind turbines. In addition, its light weight reduces the load on the membrane layer 200 and the shaping frame 100. Secondly, its strength is sufficient to ensure the connection and fixation of the tension membrane 210 and the shaping frame 100.

[0037] Furthermore, the connecting assembly 300 also includes a protective pad 330, which is disposed between the tension membrane 210 and the shaping frame 100. Specifically, this embodiment can protect the tension membrane 210 and prevent damage caused by direct contact between the tension membrane 210 and the shaping frame 100.

[0038] Furthermore, a washer 340 is fitted onto the self-tapping screw 320, and the washer 340 is located between the head of the self-tapping screw 320 and the pressure strip 310. Specifically, in this embodiment, the washer 340 can increase the force-bearing area, reduce the pressure, and protect the pressure strip 310 from damage.

[0039] Furthermore, the shaping frame 100 also includes inclined reinforcing keels 130; the reinforcing keels 130 are connected between two adjacent annular keels 110. In some other embodiments, the reinforcing keels 130 may also be connected between interconnected annular keels 110 and strip keels 120. In still other embodiments, the reinforcing keels 130 may also be connected between two adjacent strip keels 120. Specifically, the reinforcing keels 130 can provide support for the shaping frame 100, thereby improving the overall strength of the shaping frame 100.

[0040] Furthermore, the ring-shaped keel 110 and the strip-shaped keel 120 are detachably connected, facilitating rapid on-site assembly.

[0041] Furthermore, the annular keel 110 and the strip keel 120 are detachably connected via a flange 140 and multiple bolts 150; the end of the strip keel 120 is provided with a flange 140, which has multiple first connection holes, and the annular keel 110 has multiple second connection holes; the first connection holes and the second connection holes are connected by bolts 150. In some embodiments, the bolts 150 are high-strength bolts. Specifically, the connection structure of this embodiment makes the molded frame 100 more stable.

[0042] Furthermore, the outer wall at the connection point between the annular keel 110 and the strip keel 120 is polished smooth. Specifically, during actual installation, after the annular keel 110 and the strip keel 120 are connected, the outer wall at the connection point needs to be polished smooth to prevent any roughness from damaging the tensile membrane 210 during installation.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A wind generator nacelle housing, characterized in that: The application relates to a plastic frame and a membrane layer. The plastic frame comprises a plurality of ring keels and a plurality of strip keels; the ring keels are arranged at intervals along the axial direction of a cabin shell; two adjacent ring keels are connected through the strip keels. The membrane layer is wrapped outside the plastic frame; the membrane layer comprises a plurality of tension membranes which are connected through heat sealing; the tension membranes are connected with the ring keels and the strip keels.

2. A wind generator nacelle housing according to claim 1, characterised in that: The application further comprises a connecting assembly for connecting the tension membranes and the plastic frame; the connecting assembly comprises a plurality of pressing strips and a plurality of self-tapping screws; the pressing strips are arranged on the outer wall of the tension membranes and are connected with the plastic frame through the self-tapping screws.

3. A wind generator nacelle housing according to claim 2, characterised in that: The pressing strips are made of aluminum.

4. A wind generator nacelle housing according to claim 2, characterised in that: The connecting assembly further comprises a protective pad arranged between the tension membranes and the plastic frame.

5. A wind generator nacelle housing according to claim 2, characterised in that: A gasket is arranged on the self-tapping screw and is located between the head of the self-tapping screw and the pressing strip.

6. A wind generator nacelle housing according to claim 1, characterized in that: The plastic frame further comprises an inclined reinforcing keel connected between two adjacent ring keels.

7. A wind generator nacelle housing according to claim 1, characterized in that: The ring keels and the strip keels are detachably connected.

8. A wind generator nacelle housing according to claim 7, characterised in that: The ring keels and the strip keels are detachably connected through flanges and a plurality of bolts; the end of the strip keel is provided with a flange, the flange is provided with a plurality of first connecting holes, the ring keel is provided with a plurality of second connecting holes, and the first connecting holes and the second connecting holes are connected through bolts.

9. A wind generator nacelle housing according to claim 8, characterised in that: The bolts are high-strength bolts.

10. A wind generator nacelle housing according to claim 1, characterized in that: The outer wall at the connecting position of the ring keel and the strip keel is polished smooth.

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