Casting method for main shaft of wind generating set

A technology for wind turbines and main shafts, which is used in casting and molding equipment, molds, molding machines, etc., to achieve smooth flow, avoid sand inclusion, and prevent involvement.

Active Publication Date: 2013-02-13
KOCEL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no casting method suitable for 1.5MW and 2.5MW stator shafts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for casting two kinds of shaft castings of the main shaft of a wind power generating set, that is, 1.5MW series, the method includes the following steps:

[0029] a. Design pouring system: The pouring system is composed of sprue and runner. The sprue is bent, and there is a filter screen for filtering molten iron between the runners, and the bottom pour is open pouring;

[0030] b. Mold production: use a special sand box for resinization, the mold is made of resin, the interior is made of wood, the surface is made of resin, the template is made of steel and wood structure, and after the design is completed, it is molded with resin sand;

[0031] c. Modeling: Vibration compaction is used to make a sand box with a shape notch. Before modeling, place the sand-separating cold iron on the hot joint, that is, the position where the wall thickness of the casting is very different, generally the thick part of the casting; then use The bosses of the cold iron are fixed,...

Embodiment 2

[0042]1. A method for casting the main shaft of a wind power generating set, that is, two types of shaft castings of the 2.5MW series, is characterized in that the method includes the following steps:

[0043] a. Design pouring system: The pouring system is composed of sprue and runner. The sprue is bent, and there is a filter screen for filtering molten iron between the runners, and the bottom pour is open pouring;

[0044] b. Mold production: use a special sand box for resinization, the mold is made of resin, the interior is made of wood, and the surface is made of resin. The formwork adopts steel-wood structure. After the design is completed, it is molded with resin sand;

[0045] c. Modeling: Vibration compaction is used to make a sand box with a shape notch. Before modeling, place the sand-separating cold iron on the hot joint, that is, the position where the wall thickness of the casting is very different, generally the thick part of the casting; then use The bosses o...

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Abstract

The invention relates to a casting method, in particular to a casting method for a main shaft of a wind generating set. The casting method provided by the invention comprises the following steps of: designing a pouring system, manufacturing a mould, shaping, manufacturing a core, assembling the mould, compounding, smelting, adopting a stokehold spheroidization process and multistage inoculation, pouring and shakeout clearing. The casting method for the main shaft of the wind generating set is unique, meets quality index requirements on size, performance, and internal and external quality, and can realize volume production for moving/fixed shafts.

Description

technical field [0001] The invention relates to a casting method, in particular to a casting method for a main shaft of a wind power generating set. Background technique [0002] At present, the main wall thickness of the 1.5MW stator shaft of wind turbines is 80~150mm, the main wall thickness of the 1.5MW rotating shaft is 73~145mm, the main wall thickness of the 2.5MW stator shaft is 45~243mm, and the main wall thickness of the 2.5MW rotating shaft is 45~ 160mm. Among them, the 1.5MW stator shaft is a slender tubular part with the worst heat dissipation conditions, and the internal quality of its key areas must reach UT2 level. The material requirements are QT400-18AL (EN-GJS-400-18U-LT), and the performance index requirements are: tensile strength ≥ 370 MPa, yield strength ≥ 220 MPa, elongation ≥ 12%, single impact value ≥ 7J, average value ≥ 10J; casting surface quality requirements meet ISO11971-1997. [0003] At present, the main shafts of wind turbines are produced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C15/10B22C9/08
Inventor 李旭刘利平陈洪涛刘兴军孙升张守全徐国强
Owner KOCEL EQUIP
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