Process for producing wind power generator by casting technique

Abstract

The invention provides a method for producing the main shafts of a wind-driven generator by using the casting technology. The method comprises the following steps: firstly, the low and medium alloy steel contained with 0.1-0.6 percent of content of carbon is smelted, then the 0.001 to 0.2 percent of inoculant is scattered in and fully stirred, then is poured to a metallic mold, meanwhile, the magnetic field with strength of 1.5-10T is applied, and when the alloy liquid is crystallized, the variable-speed rotation is continuously carried out within the rotational speed of 50-300rpm under the driving action of a vertical centrifugal casting machine, the alloy liquid is filled and solidifies under the combined action of the feeding of the liquid metal of the dead head and the centrifugal force to form casting parts, the casting parts are taken out after being cooled to the temperature ranged from 650 to 750 DEG C, and finally, the annealing treatment is carried out. The provided casting process not only can replace the traditional forging process, ensures the shaping of the products easy, the texture of the casting parts dense and the mechanical property excellent, but also has high production efficiency, has low manufacture cost (the production cost can be reduced by above 40 percent), meanwhile, can reduce the rigorous threshold requirement of production of the main shaft of the wind-driven generator and enables the casting enterprises to produce the main shafts of the wind-driven generator.

Description

technical field [0001] The invention belongs to the technical field of the production method of the main shaft of the wind power generator, and in particular relates to a method for producing the main shaft of the wind power generator by combining the technology of gravity casting and centrifugal casting. Background technique [0002] At present, with the increasingly serious problems of global energy shortage and environmental pollution, finding and choosing green, environmentally friendly and renewable energy has become a major issue faced by countries all over the world. Compared with other energy sources, wind energy in nature not only has large reserves, is widely distributed, and is never exhausted, which is 10 times that of water energy, but also has the advantages of fast start-up, short construction period, less basic investment than hydropower station construction, and strong flexibility , and can effectively curb the greenhouse effect and sandstorm disasters, gree...

AI Technical Summary

Problems solved by technology

Although the traditional gravity casting method can produce thick and large castings, due to the influence of factors such as slow cooling rate of liquid metal in the mold, unbalanced crystallization, and insufficient feeding, it is easy to have coarse grains, Problems such as composition segregation (that is, uneven composition) and shrinkage cavity shrinkage make the strength and toughness of castings lower

Obviously, if the traditional gravity casting method is used to produce a thick fan shaft, it will inevitably fail to meet the requirements of use due to the low tensile strength, elongation and impact toughness of the fan shaft.

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