Casting method for main shaft of wind generating set

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...