Wind generating set

Abstract

The invention discloses a wind power generator group, mainly comprising a wind wheel, a gear box, a main shaft brake disc and a generator. A hub of the wind wheel is directly connected with the main shaft of a planet carrier of the gear box; the main shaft brake disc is connected with the rotor shaft of the generator by integral keys or flat keys; coaxial encapsulation is carried out on the whole or part of the output shaft of the gear box by the rotor shaft of the generator, therefore the gear box and the generator form a coaxial transportation chain with small size in axial direction and compact whole structure. The gear box uses a second class planet gear typed gear box, with a transmission ratio ranging between 1:15 to 1:25. By using the transmission form, the gear box has the advantages of more compact structure, smaller volume, and lighter weight in the situation of the same speed increasing ratio. The rated rev of the output shaft of the gear box, namely a high speed shaft, is only 375rpm, thus having low rotate speed, low noise and long service life.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind power generating set. Background technique [0002] With the development of science and technology, wind power generation technology has gradually matured. Researchers dedicated to wind power technology have developed larger and better-performing wind power generation units and put them into production and trial operation. At present, the commonly used models of wind turbines are doubly-fed and direct-drive. [0003] The doubly-fed wind turbine adopts the structure of "wind wheel + main shaft and bearing + speed-up box + coupling + generator". The hub of the wind wheel is connected to the input end of the speed-up box through the main shaft and The coupling is connected with the generator. The power generated by the wind wheel is transmitted to the gearbox through the main shaft, and then after being accelerated by the gearbox, it is transmitted to the gene...

AI Technical Summary

Problems solved by technology

The generator speed is very low, the number of poles is large, and the diameter is large. The diameter of a 1.5MW direct-drive generator is generally more than 5m, which requires large-scale processing equipment. Land transportation cannot pass through toll stations, tunnels and culverts smoothly, which brings great inconvenience to transportation, and the production and development of MW-level large-scale wind turbines are severely restricted

[0005] A small number of units using hybrid drive in foreign countries, the gear box adopts a one-stage planetary speed increase, and the speed ratio is about 1:10. The overall structure is in poor stress condition, and maintenance is extremely inconvenient.

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