Cast main frame of a wind power generating set

Abstract

The invention discloses a casting main frame of a wind turbine generating set. The casting main frame comprises a hollow shell, a top plate, a bottom plate and rear end flanges, wherein the top plateis used for connecting a main transmission chain mounting carrier, the bottom plate is used for connecting a yaw system mounting carrier, and the two rear end flanges are used for connecting a rear rack; the top plate is arranged at the upper part of the shell, the bottom plate is arranged at the lower part of the shell, a bulge is arranged at the front part of the shell, and the bulge is providedwith a front-end blast hole used for locking a wind wheel; first extending parts which extend towards the rear part of the shell are arranged on the left side and the right side of the rear part of the top plate, and the two first extending parts are connected to the upper parts of the two rear end flanges in a one-to-one correspondence mode; second extending parts which extend towards the rear part of the shell are arranged on the left side and the right side of the bottom plate, and the two second extending parts are connected to the lower parts of the two rear end flanges in a one-to-one correspondence mode; and third extending parts which extend towards the front part of the shell are arranged on the left side and the right side of the front part of the top plate. According to the casting main frame of the wind turbine generating set, the load requirements of a medium or large power wind turbine generating set and the assembling requirements of a transmission chain and a yaw system can be met, the strength is high, the weight is light, the manufacturing cost is low, and the universality is good.

Description

technical field [0001] The invention relates to a wind power generator set, in particular to a cast main frame of a wind power generator set. Background technique [0002] With the continuous maturity of my country's wind power generation technology, especially in recent years, the competition in the wind power industry has become more and more exciting. Minimizing the cost of electricity has become the development goal of wind farm owners and wind power host enterprises. On the premise of meeting the performance requirements of the wind turbine, selecting the appropriate forming method for each structural part and the formed structure can improve the cost performance of the wind turbine. The main structural parts of high-power generator sets include hubs, frames, shafting, wind wheel lock discs, etc. As the load-bearing structure of the main transmission system of the wind turbine, the main frame of the wind turbine transfers almost all the loads on the wind turbine to the...

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Problems solved by technology

[0003] At present, the manufacturing process of the main frame of the wind turbine generally adopts a welded structure. However, with the increase of the power of the wind turbine (up to megawatt level), the diameter of the main shaft, the power and size of the gearbox will also increase accordingly, and the main frame of the welded structure The frame has gradually lost its cost advantage, and the structural aspects of the main frame also need to be optimized to meet the installation requirements of the drive chain, yaw and other components

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