Wind power generating set blade pitch changing device, pitch changing method and wind power generating set

Abstract

The present invention provides a blade pitch changing device of a wind power generating set, a pitch changing method and a wind power generating set, wherein the pitch changing device includes: a disc driving structure, which is perpendicular to the axis of the pitch bearing, and is arranged on the disc driving structure. There is a track arranged around the axis of the pitch bearing; the first linear telescopic drive mechanism is connected to the track through the first clamping part that can be clamped on the track, and the first linear telescopic drive mechanism and the first clamping part are hinged Connection; the second linear telescopic drive mechanism is connected to the track through a second clamping part that can be clamped on the track, and the second linear telescopic drive mechanism is connected to the second clamping part in a hinged manner. The blade pitch change device of the wind power generating set provided by the present invention replaces the existing integral gear-driven pitch changing system, and realizes segmental pitch changing of the wind power generating set, thereby overcoming the gap between the drive gear and the pitch bearing during the pitch change process. The friction loss between the surfaces prolongs the service life of the pitch bearing.

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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