Blade pitch adjusting device and method of wind-driven generator set and wind-driven generator set

Abstract

The invention provides a blade pitch adjusting device and method of a wind-driven generator set and the wind-driven generator set. The blade pitch adjusting device comprises a plate type driving structure, a first linear telescoping driving mechanism and a second linear telescoping driving mechanism, wherein the plate type driving structure is vertical to an axis of a pitch adjusting bearing; an axis arrangement track which surrounds the pitch adjusting bearing is arranged on the plate type driving structure; the first linear telescoping driving mechanism can be connected to the track througha first clamping part which can be clamped to the track, and the first linear telescoping driving mechanism is connected to the first clamping part in a hinging manner; the second linear telescoping driving mechanism is connected to the track through a second clamping part which can be clamped to the track; and the second linear telescoping driving mechanism is connected to the second clamping part in a hinging manner. The blade pitch adjusting device of the wind-driven generator set replaces an existing integrated gear driving type pitch adjusting system to realize sectional pitch adjusting of the wind-driven generator set, and thus the problem of frictional loss between a driving gear and tooth surfaces of the pitch adjusting bearing in the pitch adjusting process can be overcome; and the service life of the pitch adjusting bearing is prolonged.

Description

technical field [0001] The invention relates to the field of wind power generation equipment, in particular to a blade pitch changing device of a wind power generator set, a pitch changing method and a wind power generator set. Background technique [0002] The pitch system of the wind turbine is used to adjust the pitch angle of the blades so that the wind turbine can be in the best working condition. emergency shutdown. About 70% of the working time of the wind turbine is at a small angle of pitch, which requires high precision of the pitch system and a short execution stroke of the pitch mechanism; about 30% of the working time of the wind turbine is at a large pitch angle, which requires a fast response of the pitch system , The pitch-changing mechanism executes a long stroke. [0003] The existing gear-driven pitch system is a set of pitch actuators, in which the pitch motor drives the pitch reducer, the pitch reducer drives the pitch output gear to rotate, the pitch ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a blade pitch changing device, a pitch changing method and a wind power generating set for a wind power generating set, which solves the problem in the prior art that the wind generating set uses a gear drive system to change the pitch at a small angle, which causes serious wear of the transmission teeth

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