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Processing method for casting low temperature ball iron hub of high-power wind electricity generator without cold iron or feeder

A technology of wind power generators and process methods, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of not being able to guarantee a high pass rate of products, improve self-feeding capacity, reduce shrinkage porosity, and facilitate slag discharge Effect

Active Publication Date: 2012-07-18
JIANGSU JIXIN WIND ENERGY TECH
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  • Abstract
  • Description
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Problems solved by technology

But the above method can not guarantee the high pass rate of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Example: According to the molding process of casting high-power wind turbine parts without chilled iron and no riser—wheel hub, it was implemented on the 1.5MW hub of American GE Company, 1.5MW hub of Goldwind Technology, and 1.5MW hub of Beijing Heavy Machinery. The wheel hub has reached the level 2 standard of EN12680-3 of UT flaw detection and the level 3 standard of EN-DIN1369 of MT. It has been recognized by customers and has been produced stably. The output has reached more than 1,000 pieces of 1.5MW wheels, and the excellent yield rate of the product has reached 95 %the above.

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Abstract

The invention discloses a process method for casting a low-temperature ductile iron hub for a high-power wind driven generator in a way of no frozen iron and riser, the hub is cast by adopting a low-temperature erosion-resistant ductile iron casting, and furan resin-sand is taken as molding sand; the sand mold has no riser and frozen iron, microvibration is carried out after the completion of themolding for compaction, the pouring speed of the cast liquid entering a mold cavity is controlled between 0.3m / s and 0.8m / s, and the pouring time is controlled at 160-600s, a filter screen is adoptedto filter the cast liquid when casting the cast liquid. Mold parting and core parting of the sand mold place the heavy section which is the junction surface with a main shaft at the highest place of the upper box of the sand mold. The process method can cast the hub for the high-power wind driven generator without using frozen iron and riser, which greatly reduces labor intensity, improves process casting yield and production efficiency, reduces production cost and improves inherent quality and surface quality of castings.

Description

Technical field [0001] The invention relates to an important part in the technical field of wind power, a casting molding process for low-temperature ductile iron hubs of MW-class wind generators, in particular to a casting method for casting high-power wind power parts hubs without chilled iron and no risers. Background technique [0002] At present, under the conditions of high global energy prices and oil crisis, wind energy, as a renewable energy and green energy, is the first choice for all countries to vigorously promote. MW-class wind turbines have become a mainstream product in the wind power industry and will become an important source of power for the grid. [0003] The hub is a key component of a high-power wind generator. Its working environment is harsh, it bears huge dynamic and static loads, and its service life is more than 20 years. The requirements for the external surface quality and internal structure of the castings are very dense, shrinkage cavity, and shrink...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D3/00B22C9/02B22D27/09
Inventor 华永荦陈玉芳王建宏王强吴跃彬
Owner JIANGSU JIXIN WIND ENERGY TECH
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