Method for casting cabin casts of aerogenerators

A technology for wind power generators and castings, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of easy deformation, large residual stress, low casting yield, etc. non-deformable effect

CN101618427AActive Publication Date: 2010-01-06宁波日星铸业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-01-06

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Abstract

The invention discloses a method for casting cabin casts of aerogenerators, comprising the steps of mould manufacture, the manufacture of sand moulds and moulding by pouring. During the manufacture of sand moulds, a bottom pouring type pouring system is adopted; an ingate II (2) is arranged in a round hole of a main bearing on the bottom surface of a cast mould cavity; an outer sprue is a quantitative ladle stopper pouring sprue; the ratio of cross-sectional areas of a sprue I to a side runner to a sprue II to an ingate I to the ingate II is (0.20 to 0.80) to (1.80 to 2.60) to 1 to (4.0 to 6.0) to (2 to 4); during the moulding by pouring, the taphole temperature of iron liquor is from 1430 DEG C to 1500 DEG C; the magnesium explosion time is from 1.20 seconds to 4.50 seconds; the pouring temperature is controlled from 1275 DEG C to 1370 DEG C; the pouring time is from 30 seconds to 70 seconds; and then a cast (1) is obtained. Compared with the prior art, the method ensures that a large cast is not easy to deform or to produce a shrinkage hole, shrinkage porosity or entrapped slag, and the rate of finished products is high.
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Description

Technical field:

[0001] The invention relates to a casting method of a wind power generator nacelle casting. Background technique:

[0002] At present, the sand casting process of ordinary parts is adopted for the castings of the wind turbine nacelle, but the weight of the castings of the wind turbine nacelle is about 7.2 tons, and the dimensions of the castings are 2480mm×2800mm×1860mm. Higher, longer length, while the sand box rigidity, sand strength, exhaust and slag retaining design and pouring temperature of the sand casting process of ordinary parts are not suitable for the casting of large parts, so the residual stress is large and easy to deform during casting , Shrinkage cavity, shrinkage porosity and slag inclusions are scrapped, and the casting yield is low. Invention content:

[0003] Aiming at the above problems, the present invention provides a casting method for a wind power generator nacelle casting that can make large castings less likely to be deformed, ...

Examples

Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific implementation example, the present invention will be further described:

[0018] A casting method for a wind turbine nacelle casting, which comprises the following steps:

[0019] 1) Mold manufacturing, carry out mold design and determine the parting surface, the mold adopts three-box shape, the model adopts Northeast Korean pine as material, and the bottom frame of the model is welded by 200mm×200mm×10mm thick square tube, and The length direction is made of a whole square tube, mainly to prevent the mold from deforming and improve the overall comprehensive performance of the mold. Lay 2 layers of wood boards and 1 layer of plywood with a thickness of not less than 20mm on the template;

[0020] 2) sand mold manufacturing, the ingate II2 is set in the main bearing round hole on the bottom surface of the casting cavity, the number of ingate II2 is 4, and the ingate II2 is a split gate with a thickness of 10mm...