Method for casting rotary axis casts of aerogenerators

Abstract

The invention discloses a method for casting rotary axis casts of aerogenerators, which comprises the steps of mould manufacture, the manufacture of sand moulds and moulding by casting. In the step b of the manufacture of sand moulds, a top sprue (1) is used as an inlet of iron liquor, and is alternately communicated with runners; a bottom runner is communicated with an ingate communicated with a cast mould cavity; the runners are designed into a first runner (3), a second runner (4) and a circular runner (5); the ingate is designed into a plurality of radial runners (6) for communicating the circular runner (5) and the cast mould cavity; filtering apparatuses are arranged on the first runner (3) and the second runner (4), and are also arranged between each radial runner (6) and the circular runner (5); and in the step c of moulding by casting, the casting temperature is controlled from 1310 DEG C to 1350DEG C; and finally, a cast (2) is obtained. The method for casting rotary axis cast of aerogenerator has the advantages of good residue blocking effect and low production cost.

Description

technical field [0001] The invention relates to the field of casting, in particular to a casting method for a rotating shaft casting of a wind power generator. Background technique [0002] Wind energy is a very important energy with huge reserves. It is safe, clean and abundant, and can provide an endless and stable energy source. At present, wind power generation has become the main form of wind energy utilization, so it is highly valued by countries all over the world, and its development speed is very fast. With the development and utilization of wind power generation technology, the quality requirements for wind power generator products are getting higher and higher, especially the rotating shaft parts, which are generally cast. For large-scale wind turbines, the weight of the rotating shaft casting reaches 5000kg, and the overall size reaches 1950mm×Φ1380mm×Φ800mm. [0003] For such large shaft parts, the slag substances in the molten iron in the casting system of th...

AI Technical Summary

Problems solved by technology

[0003] For such large shaft parts, the slag substances in the molten iron in the casting system of the traditional casting method will inevitably deposit in the casting, which is prone to casting defects, that is, slag inclusions, and also increases shrinkage cavities, The probability of shrinkage porosity will eventually lead to the scrapping of castings and the low yield of castings

In order to reduce the impact of slag inclusion on the quality of castings, a 300mm-1000mm long body riser is generally added on the top of the casting, so that the slag in the casting floats up during casting and concentrates in the body riser, and the body riser is removed after casting. Cut off from the casting to reduce the slag in the casting, but this method increases the production cost of the finished casting, and the effect of slag removal is still unsatisfactory

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