What Is Nacelle Wind Turbine? Protective Casing of Wind Turbine Generator Sets

Overview of The Wind Turbine Nacelle Cover

The wind turbine nacelle cover serves as the protective shell for the wind turbine generator set, and its reliability determines the stability and lifespan of the wind turbine.

The wind turbine nacelle cover encloses all the components inside the nacelle and isolates it from the outside. Usually, the nacelle cover is made of glass fiber reinforced plastic. Product Introduction

The nacelle cover, as an important component of the wind turbine generator, serves as the protective structure of the wind turbine. It enables the wind turbine to operate normally in harsh weather conditions, protecting the internal equipment and personnel from external environmental factors such as wind, rain, snow, salt fog, and ultraviolet radiation. Under such conditions, to ensure the normal operation of the wind turbine for 20 years, the nacelle cover must have high quality and high reliability.

The nacelle cover product is large and requires many auxiliary components. For complex models, the accessories of the nacelle cover can amount to dozens of pieces. Only by integrating all these components completely into an organic whole can it be delivered for use by the user.

Manufacturing process

The selection of the forming process for the cabin cover should meet the requirements of material properties, product quality, manufacturing cost, and production efficiency, and it needs to be based on the structural shape and size of the product to choose the appropriate process. The selection of the process directly determines the quality of the finished cabin cover. Common forming processes for fiberglass cabin covers include the hand layup forming process, vacuum bag forming process, LRTM forming process, and spray forming process etc. The selection of the process can be based on factors such as the size and shape of the cabin cover, the structure, the type of mold, the cost of the mold, the surface quality of the product, and the required thickness accuracy of the product, and the optimal forming process can be selected based on the actual situation.

Material for production

Glass fiber has many excellent properties such as light weight, high strength, resistance to chemical corrosion, electrical insulation, and microwave transmission. Moreover, the forming method is simple, and it can be used to form various large-sized or complex-shaped products at one time. The specific strength of polyester fiberglass is higher than that of steel, hard aluminum, and fir wood, but its modulus of elasticity is lower. By reasonable structural design, the deficiency in elastic modulus can be compensated, and its specific strength and other excellent properties can be fully utilized. Considering the performance requirements of the cabin cover, fiberglass is selected as the appropriate material for manufacturing the cabin cover. The fiberglass for the cabin cover is composed of unsaturated polyester resin and glass fiber reinforcement materials.

Unsaturated polyester resin

Unsaturated polyester resin has low viscosity, easy penetration of reinforcement materials, light appearance color, adjustable viscosity and gelation and curing time, and the comprehensive performance of the cured resin is good, with good toughness, acid resistance, corrosion resistance, and aging resistance. It also has the characteristics of a relatively low price and a wide variety of types.

Glass fiber reinforcement materials

Glass fiber reinforcement materials are the main load-bearing materials of fiberglass. They can significantly increase the strength and modulus of elasticity of the resin, reduce shrinkage during the molding process of composite materials, and improve the heat deformation temperature. E-glass fiber is an aluminum-boron-silicate fiber, with the content of alkali metal oxides less than 0.8%. This fiber has high strength, good aging resistance, and excellent electrical properties. Its disadvantage is that inorganic acids easily erode it. It is widely used in glass fiber products with high strength and water resistance requirements. The selection of glass fiber reinforcement materials should be based on the performance requirements of the product, such as mechanical properties, heat resistance, corrosion resistance, electrical properties, etc., as well as the molding process and cost requirements of the product. It is necessary to pay attention to that the resin should easily wet the selected glass fiber and its fabric; have good deformability to meet the molding needs of complex-shaped products; meet the performance requirements of the product, and be inexpensive under the premise of meeting the performance requirements.

Cabin cover mold

The mold is the main equipment in the cabin cover forming process. The structural form, strength, and surface quality of the mold have a significant impact on the quality, production cost, and production efficiency of the cabin cover product. Therefore, the manufacturing of the mold should follow the following basic principles:

(1) The mold must first meet the precision requirements of the product design. A mold with small deformation and high precision can ensure the accurate size of the product, so for products with high size precision requirements, shrinkage allowance and deformation allowance are generally given based on experience.

(2) The mold should have sufficient strength and rigidity. Sufficient strength and rigidity can reduce mold deformation and reduce the damage to the mold caused by external forces such as mold removal and transportation during the product manufacturing process, and extend the service life of the mold.

(3) The mold should be easy to use and facilitate demolding. Currently, the size of the cabin cover mold for 2.0MW units is about 17m in length, 4-6m in width and height, and for 6.0MW units, the size will be even larger. Therefore, in mold design, the manufacturing and demolding methods of the product should be fully considered, and corresponding demolding angles and mechanisms should be set to improve production efficiency.

(4) The appropriate mold material should be selected based on the quality and production volume requirements of the cabin cover product. Molds are generally quite expensive, so choosing different materials has a significant impact on the quality and cost of the molds. Therefore, the selection of materials should be based on the cost of the mold itself and its service life.

Key points to note:

(1) Select appropriate base materials and reinforcing materials based on the required mechanical performance data for the design.

(2) Since this product has a long service life and operates in harsh environments, the product coating should have aging resistance.

(3) Design the layup based on the thickness of the product to determine a reasonable production process;

(4) The laying and overlapping of reinforcing materials should be strictly controlled;

(5) Control the size of subsequent reinforcement and maintenance components to avoid interference that affects the cooperation during the installation process;

6) Control the size during the assembly and mold joining process to ensure the universality of the produced product;

(7) Publicize the production process of the product.

Product inspection

In the current environment where the wind power generation market is expanding and product competition is fierce, only high-quality products can survive. Moreover, the cabin cover product itself has a large shape, many processes, complex components, and many coordination dimensions with small tolerances. This requires the inspection to be fully tracked, from the design and production of the mold to the incoming inspection of raw materials, all must be strictly controlled. First, formulate a reasonable inspection process, control key points for critical stations, and prepare and fill in relevant inspection record sheets and transfer cards. Based on these circumstances, set up dedicated quality inspectors for each key process to conduct process supervision and inspection, and design inspection records for key dimensions in the cooperation, so as to ensure the batch production of the product.

Supplier

Luoyang Fonyo Heavy Industries Co., Ltd, founded in 1998,is a manufacturer in cast railway parts.Our factory covers an area of 72,600㎡, with more than 300 employees, 32 technicians, including 5 senior engineers, 11 assistant engineers, and 16 technicians. Our production capacity is 30,000 tons per year. Currently, we mainly produce casting, machining, and assembly for locomotive, railcar, high-speed trains, mining equipment, wind power, etc. Our products have been exported to Russia, the United States, Germany, Argentina, Japan, France, South Africa, Italy and other countries.
Contact: Cathy
Email:sales@railwaypart.com
Mobile:008615515321683