CN201162631Y - Large Wind Turbine Canopy - Google Patents

Abstract

The large-scale wind turbine cabin cover belongs to the equipment for wind power generating units, including an upper cover body and a lower cover body. The upper cover body and the lower cover body made of multi-directional glass fiber cloth are connected by an inner flange. The upper cover body and the lower cover body Hollow reinforcing ribs are placed on the inner side. By changing the structure and connection method of the wind turbine nacelle cover, the mechanical strength of the product is improved, the anti-aging and wind load resistance are enhanced, and the nacelle cover is enlarged. High, large bearing capacity, economical, safe, and easy to install, especially suitable for wind turbines above 1.5 MW.

Description

Large Wind Turbine Canopy

technical field

The utility model belongs to equipment for wind power generating sets, in particular to a large-scale wind generator nacelle cover for wind power generating sets with high installed capacity (above 1.5 megawatts).

Background technique

Existing wind turbine nacelles are divided into small and medium-sized types, which are formed by hand lay-up of reinforced fibers. This type of nacelle cover is only used for wind turbines below 1 MW. Due to the small size and low installation height of small and medium wind turbines, it is difficult to The requirements for the mechanical strength of the nacelle cover are not high, but the wind turbines above 1.5 MW have a large installation space (about 10m in length, about 3.6m in width, and about 3.8m in height) and a high installation height (50-60m). The overall structure of the nacelle is required to be compact, light in weight, strong in mechanical strength, wind load resistance, anti-aging, and long in service life. Therefore, the performance and structure of some small and medium-sized wind turbine nacelles on site cannot meet the needs of high-capacity wind turbines. Require. In addition, the reinforcing fiber used to manufacture this kind of wind turbine canopy is two-way cloth in warp and weft, and the strength of the product is only two-way. The assembly joints of the upper and lower covers are butt-joint, and the joints must be post-processed during installation. Many installation processes lead to long installation periods.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide an economical, safe, high-strength, and convenient installation large-scale wind turbine cabin cover suitable for wind turbines above 1.5 MW. The main innovation is that the multi-directional glass fiber cloth is used as the Material, the stress in all directions of the product is increased, and the overall strength is enhanced; the upper and lower covers of the wind turbine cover are connected by flanges, and the structure of the thin shell and ribs is used to control the weight of the cover. Specifically, it is implemented as follows: the large-scale wind turbine cabin cover includes an upper cover body and a lower cover body, which is characterized in that the upper cover body and the lower cover body made of multi-directional glass fiber cloth are connected by an inner flange, the upper cover body and the lower cover body Hollow reinforcing ribs are arranged on the inner side of the cover body. Since the wind turbine is installed at a high altitude, the weight of the nacelle cover must be strictly controlled in consideration of the load bearing of the entire unit. Therefore, a thin shell and ribbed structure is used to control the weight of the nacelle cover. The thickness of the nacelle cover is only 7-8mm, compared with The wall thickness (10mm) of small and medium-sized engine room covers is still small. Due to the large area of the engine room cover, the rigidity of the cover body is insufficient. Therefore, hollow reinforcing ribs are installed on the inner side of the engine room cover to increase the rigidity of the bulkhead and prevent the deformation of the bulkhead; The upper and lower covers are connected by means of inner flanges, which is convenient and quick to install. After the installation is completed, the splicing flanges cannot be seen in the shape of the nacelle cover. This flange connection can improve the overall aesthetics of the nacelle cover, and the flange can be used as a Wall transverse stiffeners. The upper and lower covers are made of multi-directional glass fiber cloth. Due to the increase in stress in all directions, the overall strength is also enhanced. At the same time, the matrix resin with high toughness, high mechanical strength, good heat resistance and low shrinkage rate is selected to ensure the mechanical stability of the product body. Strength, during construction, a mixed construction process is adopted, that is, the construction method of spraying + hand lay-up, which overcomes the shortcomings that the existing small and medium-sized nacelle covers are usually processed by hand lay-up molding, and the uniformity of the resin glue amount of the fiber cannot be controlled. , After using the injection method, it can ensure that the glue content of the fiber is uniform, so that the strength of the product is uniform everywhere.

All the surfaces of the upper and lower covers of the large-scale wind turbine cabin cover of the utility model are curved surface structures, and the connecting corners of each surface are circular arcs that are smooth and excessive. Compared with the square structure of the existing wind turbine cabin cover, this structure greatly reduces The resistance of the surface to the flowing air enhances the conductivity of the air and improves the wind load resistance of the nacelle cover.

The utility model improves the mechanical strength of the product by changing the structure and connection mode of the wind turbine cabin cover, enhances the anti-aging and wind load resistance, and enlarges the cabin cover, which is not only light in weight, high in strength and large in bearing capacity, but also economical and safe. , Easy to install, especially suitable for wind turbines above 1.5 MW.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

Large-scale wind turbine cabin cover, the upper cover body 1 and the lower cover body 2 are made of multi-directional glass fiber cloth and matrix resin by a combination of spraying and hand lay-up, with a thickness of 7-8mm, and all surfaces of the upper and lower covers are curved. Structure, the upper cover body 1 and the lower cover body 2 are connected by the inner flange 4, and the inner sides of the upper cover body 1 and the lower cover body 2 are provided with hollow reinforcing ribs 3.

Claims (3)

1. the large-scale wind electricity engine room cover comprises upper outlet body, lower cover, it is characterized in that the upper outlet body that multidirectional glass fiber cloth is made is connected by inner flange with lower cover, all is equipped with hollow strengthening rib on the inner side surface of upper outlet body and lower cover.

2. large-scale wind electricity engine room cover according to claim 1, the thickness that it is characterized in that lower cover is 7-8mm.

3. large-scale wind electricity engine room cover according to claim 1 and 2 is characterized in that all surface of lower cover is curved-surface structure.

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